[PATCH 11/14] drm/i915: Split GT powermanagement functions to intel_gt_pm.c

Chris Wilson chris at chris-wilson.co.uk
Sat Dec 9 00:37:15 UTC 2017


intel_pm.c has grown to several thousand lines of loosely connected code
handling various powermanagement tasks. Split out the GT portion (IPS,
RPS and RC6) into its own file for easily maintenance.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/Makefile           |    1 +
 drivers/gpu/drm/i915/i915_debugfs.c     |    2 +
 drivers/gpu/drm/i915/i915_drv.c         |    5 +
 drivers/gpu/drm/i915/i915_drv.h         |    2 -
 drivers/gpu/drm/i915/i915_gem.c         |   19 +-
 drivers/gpu/drm/i915/i915_gem_request.c |    1 +
 drivers/gpu/drm/i915/i915_pmu.c         |    1 +
 drivers/gpu/drm/i915/i915_sysfs.c       |    2 +
 drivers/gpu/drm/i915/intel_display.c    |    1 +
 drivers/gpu/drm/i915/intel_drv.h        |   13 -
 drivers/gpu/drm/i915/intel_gt_pm.c      | 2336 ++++++++++++++++++++++++++
 drivers/gpu/drm/i915/intel_gt_pm.h      |   46 +
 drivers/gpu/drm/i915/intel_pm.c         | 2721 +++----------------------------
 drivers/gpu/drm/i915/intel_uncore.c     |    2 -
 14 files changed, 2614 insertions(+), 2538 deletions(-)
 create mode 100644 drivers/gpu/drm/i915/intel_gt_pm.c
 create mode 100644 drivers/gpu/drm/i915/intel_gt_pm.h

diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index 091aef281963..209157890df1 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -41,6 +41,7 @@ i915-y := i915_drv.o \
 	  i915_sysfs.o \
 	  intel_csr.o \
 	  intel_device_info.o \
+	  intel_gt_pm.o \
 	  intel_pm.o \
 	  intel_runtime_pm.o
 
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 9ccc6bcc7069..91f0c0a7ee2b 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -29,7 +29,9 @@
 #include <linux/debugfs.h>
 #include <linux/sort.h>
 #include <linux/sched/mm.h>
+
 #include "intel_drv.h"
+#include "intel_gt_pm.h"
 #include "intel_guc_submission.h"
 
 static inline struct drm_i915_private *node_to_i915(struct drm_info_node *node)
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 0054d4074c34..2cdb39e28842 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -51,6 +51,7 @@
 #include "i915_pmu.h"
 #include "i915_vgpu.h"
 #include "intel_drv.h"
+#include "intel_gt_pm.h"
 #include "intel_uc.h"
 
 static struct drm_driver driver;
@@ -1044,6 +1045,7 @@ static int i915_driver_init_mmio(struct drm_i915_private *dev_priv)
  */
 static void i915_driver_cleanup_mmio(struct drm_i915_private *dev_priv)
 {
+	intel_sanitize_gt_powersave(dev_priv);
 	intel_uncore_fini(dev_priv);
 	i915_mmio_cleanup(dev_priv);
 	pci_dev_put(dev_priv->bridge_dev);
@@ -1151,6 +1153,9 @@ static int i915_driver_init_hw(struct drm_i915_private *dev_priv)
 
 	intel_uncore_sanitize(dev_priv);
 
+	/* BIOS often leaves RC6 enabled, but disable it for hw init */
+	intel_sanitize_gt_powersave(dev_priv);
+
 	intel_opregion_setup(dev_priv);
 
 	i915_gem_load_init_fences(dev_priv);
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 9d7c9cf0fd70..8ac3d4690de8 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -4238,8 +4238,6 @@ void vlv_phy_pre_encoder_enable(struct intel_encoder *encoder,
 void vlv_phy_reset_lanes(struct intel_encoder *encoder,
 			 const struct intel_crtc_state *old_crtc_state);
 
-int intel_gpu_freq(struct drm_i915_private *dev_priv, int val);
-int intel_freq_opcode(struct drm_i915_private *dev_priv, int val);
 u64 intel_rc6_residency_ns(struct drm_i915_private *dev_priv,
 			   const i915_reg_t reg);
 
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 1e1ba92b47d1..980d67ea5d1d 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -28,14 +28,7 @@
 #include <drm/drmP.h>
 #include <drm/drm_vma_manager.h>
 #include <drm/i915_drm.h>
-#include "i915_drv.h"
-#include "i915_gem_clflush.h"
-#include "i915_vgpu.h"
-#include "i915_trace.h"
-#include "intel_drv.h"
-#include "intel_frontbuffer.h"
-#include "intel_mocs.h"
-#include "i915_gemfs.h"
+
 #include <linux/dma-fence-array.h>
 #include <linux/kthread.h>
 #include <linux/reservation.h>
@@ -46,6 +39,16 @@
 #include <linux/pci.h>
 #include <linux/dma-buf.h>
 
+#include "i915_drv.h"
+#include "i915_gemfs.h"
+#include "i915_gem_clflush.h"
+#include "i915_vgpu.h"
+#include "i915_trace.h"
+#include "intel_drv.h"
+#include "intel_frontbuffer.h"
+#include "intel_gt_pm.h"
+#include "intel_mocs.h"
+
 static void i915_gem_flush_free_objects(struct drm_i915_private *i915);
 
 static bool cpu_write_needs_clflush(struct drm_i915_gem_object *obj)
diff --git a/drivers/gpu/drm/i915/i915_gem_request.c b/drivers/gpu/drm/i915/i915_gem_request.c
index 3d12d7530cc9..093fc9e50b2d 100644
--- a/drivers/gpu/drm/i915/i915_gem_request.c
+++ b/drivers/gpu/drm/i915/i915_gem_request.c
@@ -29,6 +29,7 @@
 #include <linux/sched/signal.h>
 
 #include "i915_drv.h"
+#include "intel_gt_pm.h"
 
 static const char *i915_fence_get_driver_name(struct dma_fence *fence)
 {
diff --git a/drivers/gpu/drm/i915/i915_pmu.c b/drivers/gpu/drm/i915/i915_pmu.c
index 55a8a1e29424..ed32f3ca9df5 100644
--- a/drivers/gpu/drm/i915/i915_pmu.c
+++ b/drivers/gpu/drm/i915/i915_pmu.c
@@ -27,6 +27,7 @@
 
 #include "i915_drv.h"
 #include "i915_pmu.h"
+#include "intel_gt_pm.h"
 #include "intel_ringbuffer.h"
 
 /* Frequency for the sampling timer for events which need it. */
diff --git a/drivers/gpu/drm/i915/i915_sysfs.c b/drivers/gpu/drm/i915/i915_sysfs.c
index c74a20b80182..75d19749e81b 100644
--- a/drivers/gpu/drm/i915/i915_sysfs.c
+++ b/drivers/gpu/drm/i915/i915_sysfs.c
@@ -29,7 +29,9 @@
 #include <linux/module.h>
 #include <linux/stat.h>
 #include <linux/sysfs.h>
+
 #include "intel_drv.h"
+#include "intel_gt_pm.h"
 #include "i915_drv.h"
 
 static inline struct drm_i915_private *kdev_minor_to_i915(struct device *kdev)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index f0a8686f0513..418ab314b2bb 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -35,6 +35,7 @@
 #include <drm/drmP.h>
 #include "intel_drv.h"
 #include "intel_frontbuffer.h"
+#include "intel_gt_pm.h"
 #include <drm/i915_drm.h>
 #include "i915_drv.h"
 #include "i915_gem_clflush.h"
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 30f791f89d64..ca691d172dff 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1875,19 +1875,6 @@ void intel_update_watermarks(struct intel_crtc *crtc);
 void intel_init_pm(struct drm_i915_private *dev_priv);
 void intel_init_clock_gating_hooks(struct drm_i915_private *dev_priv);
 void intel_pm_setup(struct drm_i915_private *dev_priv);
-void intel_gpu_ips_init(struct drm_i915_private *dev_priv);
-void intel_gpu_ips_teardown(void);
-void intel_init_gt_powersave(struct drm_i915_private *dev_priv);
-void intel_cleanup_gt_powersave(struct drm_i915_private *dev_priv);
-void intel_sanitize_gt_powersave(struct drm_i915_private *dev_priv);
-void intel_enable_gt_powersave(struct drm_i915_private *dev_priv);
-void intel_disable_gt_powersave(struct drm_i915_private *dev_priv);
-void intel_suspend_gt_powersave(struct drm_i915_private *dev_priv);
-void gen6_rps_busy(struct drm_i915_private *dev_priv);
-void gen6_rps_reset_ei(struct drm_i915_private *dev_priv);
-void gen6_rps_idle(struct drm_i915_private *dev_priv);
-void gen6_rps_boost(struct drm_i915_gem_request *rq,
-		    struct intel_rps_client *rps);
 void g4x_wm_get_hw_state(struct drm_device *dev);
 void vlv_wm_get_hw_state(struct drm_device *dev);
 void ilk_wm_get_hw_state(struct drm_device *dev);
diff --git a/drivers/gpu/drm/i915/intel_gt_pm.c b/drivers/gpu/drm/i915/intel_gt_pm.c
new file mode 100644
index 000000000000..edfc4d8ab3bf
--- /dev/null
+++ b/drivers/gpu/drm/i915/intel_gt_pm.c
@@ -0,0 +1,2336 @@
+/*
+ * Copyright © 2012 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include <linux/cpufreq.h>
+#include <linux/module.h>
+
+#include "i915_drv.h"
+#include "intel_drv.h"
+#include "../../../platform/x86/intel_ips.h"
+
+#include "intel_gt_pm.h"
+
+/**
+ * DOC: RC6
+ *
+ * RC6 is a special power stage which allows the GPU to enter an very
+ * low-voltage mode when idle, using down to 0V while at this stage.  This
+ * stage is entered automatically when the GPU is idle when RC6 support is
+ * enabled, and as soon as new workload arises GPU wakes up automatically as well.
+ *
+ * There are different RC6 modes available in Intel GPU, which differentiate
+ * among each other with the latency required to enter and leave RC6 and
+ * voltage consumed by the GPU in different states.
+ *
+ * The combination of the following flags define which states GPU is allowed
+ * to enter, while RC6 is the normal RC6 state, RC6p is the deep RC6, and
+ * RC6pp is deepest RC6. Their support by hardware varies according to the
+ * GPU, BIOS, chipset and platform. RC6 is usually the safest one and the one
+ * which brings the most power savings; deeper states save more power, but
+ * require higher latency to switch to and wake up.
+ */
+
+
+/*
+ * Lock protecting IPS related data structures
+ */
+DEFINE_SPINLOCK(mchdev_lock);
+
+bool ironlake_set_drps(struct drm_i915_private *dev_priv, u8 val)
+{
+	u16 rgvswctl;
+
+	lockdep_assert_held(&mchdev_lock);
+
+	rgvswctl = I915_READ16(MEMSWCTL);
+	if (rgvswctl & MEMCTL_CMD_STS) {
+		DRM_DEBUG("gpu busy, RCS change rejected\n");
+		return false; /* still busy with another command */
+	}
+
+	rgvswctl = (MEMCTL_CMD_CHFREQ << MEMCTL_CMD_SHIFT) |
+		(val << MEMCTL_FREQ_SHIFT) | MEMCTL_SFCAVM;
+	I915_WRITE16(MEMSWCTL, rgvswctl);
+	POSTING_READ16(MEMSWCTL);
+
+	rgvswctl |= MEMCTL_CMD_STS;
+	I915_WRITE16(MEMSWCTL, rgvswctl);
+
+	return true;
+}
+
+static void ironlake_enable_drps(struct drm_i915_private *dev_priv)
+{
+	u32 rgvmodectl;
+	u8 fmax, fmin, fstart, vstart;
+
+	spin_lock_irq(&mchdev_lock);
+
+	rgvmodectl = I915_READ(MEMMODECTL);
+
+	/* Enable temp reporting */
+	I915_WRITE16(PMMISC, I915_READ(PMMISC) | MCPPCE_EN);
+	I915_WRITE16(TSC1, I915_READ(TSC1) | TSE);
+
+	/* 100ms RC evaluation intervals */
+	I915_WRITE(RCUPEI, 100000);
+	I915_WRITE(RCDNEI, 100000);
+
+	/* Set max/min thresholds to 90ms and 80ms respectively */
+	I915_WRITE(RCBMAXAVG, 90000);
+	I915_WRITE(RCBMINAVG, 80000);
+
+	I915_WRITE(MEMIHYST, 1);
+
+	/* Set up min, max, and cur for interrupt handling */
+	fmax = (rgvmodectl & MEMMODE_FMAX_MASK) >> MEMMODE_FMAX_SHIFT;
+	fmin = (rgvmodectl & MEMMODE_FMIN_MASK);
+	fstart = (rgvmodectl & MEMMODE_FSTART_MASK) >>
+		MEMMODE_FSTART_SHIFT;
+
+	vstart = (I915_READ(PXVFREQ(fstart)) & PXVFREQ_PX_MASK) >>
+		PXVFREQ_PX_SHIFT;
+
+	dev_priv->ips.fmax = fmax; /* IPS callback will increase this */
+	dev_priv->ips.fstart = fstart;
+
+	dev_priv->ips.max_delay = fstart;
+	dev_priv->ips.min_delay = fmin;
+	dev_priv->ips.cur_delay = fstart;
+
+	DRM_DEBUG_DRIVER("fmax: %d, fmin: %d, fstart: %d\n",
+			 fmax, fmin, fstart);
+
+	I915_WRITE(MEMINTREN, MEMINT_CX_SUPR_EN | MEMINT_EVAL_CHG_EN);
+
+	/*
+	 * Interrupts will be enabled in ironlake_irq_postinstall
+	 */
+
+	I915_WRITE(VIDSTART, vstart);
+	POSTING_READ(VIDSTART);
+
+	rgvmodectl |= MEMMODE_SWMODE_EN;
+	I915_WRITE(MEMMODECTL, rgvmodectl);
+
+	if (wait_for_atomic((I915_READ(MEMSWCTL) & MEMCTL_CMD_STS) == 0, 10))
+		DRM_ERROR("stuck trying to change perf mode\n");
+	mdelay(1);
+
+	ironlake_set_drps(dev_priv, fstart);
+
+	dev_priv->ips.last_count1 = I915_READ(DMIEC) +
+		I915_READ(DDREC) + I915_READ(CSIEC);
+	dev_priv->ips.last_time1 = jiffies_to_msecs(jiffies);
+	dev_priv->ips.last_count2 = I915_READ(GFXEC);
+	dev_priv->ips.last_time2 = ktime_get_raw_ns();
+
+	spin_unlock_irq(&mchdev_lock);
+}
+
+static void ironlake_disable_drps(struct drm_i915_private *dev_priv)
+{
+	u16 rgvswctl;
+
+	spin_lock_irq(&mchdev_lock);
+
+	rgvswctl = I915_READ16(MEMSWCTL);
+
+	/* Ack interrupts, disable EFC interrupt */
+	I915_WRITE(MEMINTREN, I915_READ(MEMINTREN) & ~MEMINT_EVAL_CHG_EN);
+	I915_WRITE(MEMINTRSTS, MEMINT_EVAL_CHG);
+	I915_WRITE(DEIER, I915_READ(DEIER) & ~DE_PCU_EVENT);
+	I915_WRITE(DEIIR, DE_PCU_EVENT);
+	I915_WRITE(DEIMR, I915_READ(DEIMR) | DE_PCU_EVENT);
+
+	/* Go back to the starting frequency */
+	ironlake_set_drps(dev_priv, dev_priv->ips.fstart);
+	mdelay(1);
+	rgvswctl |= MEMCTL_CMD_STS;
+	I915_WRITE(MEMSWCTL, rgvswctl);
+	mdelay(1);
+
+	spin_unlock_irq(&mchdev_lock);
+}
+
+/* There's a funny hw issue where the hw returns all 0 when reading from
+ * GEN6_RP_INTERRUPT_LIMITS. Hence we always need to compute the desired value
+ * ourselves, instead of doing a rmw cycle (which might result in us clearing
+ * all limits and the gpu stuck at whatever frequency it is at atm).
+ */
+static u32 intel_rps_limits(struct drm_i915_private *dev_priv, u8 val)
+{
+	struct intel_rps *rps = &dev_priv->gt_pm.rps;
+	u32 limits;
+
+	/* Only set the down limit when we've reached the lowest level to avoid
+	 * getting more interrupts, otherwise leave this clear. This prevents a
+	 * race in the hw when coming out of rc6: There's a tiny window where
+	 * the hw runs at the minimal clock before selecting the desired
+	 * frequency, if the down threshold expires in that window we will not
+	 * receive a down interrupt. */
+	if (INTEL_GEN(dev_priv) >= 9) {
+		limits = (rps->max_freq_softlimit) << 23;
+		if (val <= rps->min_freq_softlimit)
+			limits |= (rps->min_freq_softlimit) << 14;
+	} else {
+		limits = rps->max_freq_softlimit << 24;
+		if (val <= rps->min_freq_softlimit)
+			limits |= rps->min_freq_softlimit << 16;
+	}
+
+	return limits;
+}
+
+static void gen6_set_rps_thresholds(struct drm_i915_private *dev_priv, u8 val)
+{
+	struct intel_rps *rps = &dev_priv->gt_pm.rps;
+	int new_power;
+	u32 threshold_up = 0, threshold_down = 0; /* in % */
+	u32 ei_up = 0, ei_down = 0;
+
+	new_power = rps->power;
+	switch (rps->power) {
+	case LOW_POWER:
+		if (val > rps->efficient_freq + 1 &&
+		    val > rps->cur_freq)
+			new_power = BETWEEN;
+		break;
+
+	case BETWEEN:
+		if (val <= rps->efficient_freq &&
+		    val < rps->cur_freq)
+			new_power = LOW_POWER;
+		else if (val >= rps->rp0_freq &&
+			 val > rps->cur_freq)
+			new_power = HIGH_POWER;
+		break;
+
+	case HIGH_POWER:
+		if (val < (rps->rp1_freq + rps->rp0_freq) >> 1 &&
+		    val < rps->cur_freq)
+			new_power = BETWEEN;
+		break;
+	}
+	/* Max/min bins are special */
+	if (val <= rps->min_freq_softlimit)
+		new_power = LOW_POWER;
+	if (val >= rps->max_freq_softlimit)
+		new_power = HIGH_POWER;
+	if (new_power == rps->power)
+		return;
+
+	/* Note the units here are not exactly 1us, but 1280ns. */
+	switch (new_power) {
+	case LOW_POWER:
+		/* Upclock if more than 95% busy over 16ms */
+		ei_up = 16000;
+		threshold_up = 95;
+
+		/* Downclock if less than 85% busy over 32ms */
+		ei_down = 32000;
+		threshold_down = 85;
+		break;
+
+	case BETWEEN:
+		/* Upclock if more than 90% busy over 13ms */
+		ei_up = 13000;
+		threshold_up = 90;
+
+		/* Downclock if less than 75% busy over 32ms */
+		ei_down = 32000;
+		threshold_down = 75;
+		break;
+
+	case HIGH_POWER:
+		/* Upclock if more than 85% busy over 10ms */
+		ei_up = 10000;
+		threshold_up = 85;
+
+		/* Downclock if less than 60% busy over 32ms */
+		ei_down = 32000;
+		threshold_down = 60;
+		break;
+	}
+
+	/* When byt can survive without system hang with dynamic
+	 * sw freq adjustments, this restriction can be lifted.
+	 */
+	if (IS_VALLEYVIEW(dev_priv))
+		goto skip_hw_write;
+
+	I915_WRITE(GEN6_RP_UP_EI,
+		   GT_INTERVAL_FROM_US(dev_priv, ei_up));
+	I915_WRITE(GEN6_RP_UP_THRESHOLD,
+		   GT_INTERVAL_FROM_US(dev_priv,
+				       ei_up * threshold_up / 100));
+
+	I915_WRITE(GEN6_RP_DOWN_EI,
+		   GT_INTERVAL_FROM_US(dev_priv, ei_down));
+	I915_WRITE(GEN6_RP_DOWN_THRESHOLD,
+		   GT_INTERVAL_FROM_US(dev_priv,
+				       ei_down * threshold_down / 100));
+
+	I915_WRITE(GEN6_RP_CONTROL,
+		   GEN6_RP_MEDIA_TURBO |
+		   GEN6_RP_MEDIA_HW_NORMAL_MODE |
+		   GEN6_RP_MEDIA_IS_GFX |
+		   GEN6_RP_ENABLE |
+		   GEN6_RP_UP_BUSY_AVG |
+		   GEN6_RP_DOWN_IDLE_AVG);
+
+skip_hw_write:
+	rps->power = new_power;
+	rps->up_threshold = threshold_up;
+	rps->down_threshold = threshold_down;
+	rps->last_adj = 0;
+}
+
+static u32 gen6_rps_pm_mask(struct drm_i915_private *dev_priv, u8 val)
+{
+	struct intel_rps *rps = &dev_priv->gt_pm.rps;
+	u32 mask = 0;
+
+	/* We use UP_EI_EXPIRED interupts for both up/down in manual mode */
+	if (val > rps->min_freq_softlimit)
+		mask |= GEN6_PM_RP_UP_EI_EXPIRED | GEN6_PM_RP_DOWN_THRESHOLD | GEN6_PM_RP_DOWN_TIMEOUT;
+	if (val < rps->max_freq_softlimit)
+		mask |= GEN6_PM_RP_UP_EI_EXPIRED | GEN6_PM_RP_UP_THRESHOLD;
+
+	mask &= dev_priv->pm_rps_events;
+
+	return gen6_sanitize_rps_pm_mask(dev_priv, ~mask);
+}
+
+/* gen6_set_rps is called to update the frequency request, but should also be
+ * called when the range (min_delay and max_delay) is modified so that we can
+ * update the GEN6_RP_INTERRUPT_LIMITS register accordingly. */
+static int gen6_set_rps(struct drm_i915_private *dev_priv, u8 val)
+{
+	struct intel_rps *rps = &dev_priv->gt_pm.rps;
+
+	/* min/max delay may still have been modified so be sure to
+	 * write the limits value.
+	 */
+	if (val != rps->cur_freq) {
+		gen6_set_rps_thresholds(dev_priv, val);
+
+		if (INTEL_GEN(dev_priv) >= 9)
+			I915_WRITE(GEN6_RPNSWREQ,
+				   GEN9_FREQUENCY(val));
+		else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
+			I915_WRITE(GEN6_RPNSWREQ,
+				   HSW_FREQUENCY(val));
+		else
+			I915_WRITE(GEN6_RPNSWREQ,
+				   GEN6_FREQUENCY(val) |
+				   GEN6_OFFSET(0) |
+				   GEN6_AGGRESSIVE_TURBO);
+	}
+
+	/* Make sure we continue to get interrupts
+	 * until we hit the minimum or maximum frequencies.
+	 */
+	I915_WRITE(GEN6_RP_INTERRUPT_LIMITS, intel_rps_limits(dev_priv, val));
+	I915_WRITE(GEN6_PMINTRMSK, gen6_rps_pm_mask(dev_priv, val));
+
+	rps->cur_freq = val;
+	trace_intel_gpu_freq_change(intel_gpu_freq(dev_priv, val));
+
+	return 0;
+}
+
+static int valleyview_set_rps(struct drm_i915_private *dev_priv, u8 val)
+{
+	int err;
+
+	if (WARN_ONCE(IS_CHERRYVIEW(dev_priv) && (val & 1),
+		      "Odd GPU freq value\n"))
+		val &= ~1;
+
+	I915_WRITE(GEN6_PMINTRMSK, gen6_rps_pm_mask(dev_priv, val));
+
+	if (val != dev_priv->gt_pm.rps.cur_freq) {
+		err = vlv_punit_write(dev_priv, PUNIT_REG_GPU_FREQ_REQ, val);
+		if (err)
+			return err;
+
+		gen6_set_rps_thresholds(dev_priv, val);
+	}
+
+	dev_priv->gt_pm.rps.cur_freq = val;
+	trace_intel_gpu_freq_change(intel_gpu_freq(dev_priv, val));
+
+	return 0;
+}
+
+/* vlv_set_rps_idle: Set the frequency to idle, if Gfx clocks are down
+ *
+ * * If Gfx is Idle, then
+ * 1. Forcewake Media well.
+ * 2. Request idle freq.
+ * 3. Release Forcewake of Media well.
+*/
+static void vlv_set_rps_idle(struct drm_i915_private *dev_priv)
+{
+	struct intel_rps *rps = &dev_priv->gt_pm.rps;
+	u32 val = rps->idle_freq;
+	int err;
+
+	if (rps->cur_freq <= val)
+		return;
+
+	/* The punit delays the write of the frequency and voltage until it
+	 * determines the GPU is awake. During normal usage we don't want to
+	 * waste power changing the frequency if the GPU is sleeping (rc6).
+	 * However, the GPU and driver is now idle and we do not want to delay
+	 * switching to minimum voltage (reducing power whilst idle) as we do
+	 * not expect to be woken in the near future and so must flush the
+	 * change by waking the device.
+	 *
+	 * We choose to take the media powerwell (either would do to trick the
+	 * punit into committing the voltage change) as that takes a lot less
+	 * power than the render powerwell.
+	 */
+	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_MEDIA);
+	err = valleyview_set_rps(dev_priv, val);
+	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_MEDIA);
+
+	if (err)
+		DRM_ERROR("Failed to set RPS for idle\n");
+}
+
+void gen6_rps_busy(struct drm_i915_private *dev_priv)
+{
+	struct intel_rps *rps = &dev_priv->gt_pm.rps;
+
+	mutex_lock(&dev_priv->pcu_lock);
+	if (rps->enabled) {
+		u8 freq;
+
+		if (dev_priv->pm_rps_events & GEN6_PM_RP_UP_EI_EXPIRED)
+			gen6_rps_reset_ei(dev_priv);
+		I915_WRITE(GEN6_PMINTRMSK,
+			   gen6_rps_pm_mask(dev_priv, rps->cur_freq));
+
+		gen6_enable_rps_interrupts(dev_priv);
+
+		/* Use the user's desired frequency as a guide, but for better
+		 * performance, jump directly to RPe as our starting frequency.
+		 */
+		freq = max(rps->cur_freq,
+			   rps->efficient_freq);
+
+		if (intel_set_rps(dev_priv,
+				  clamp(freq,
+					rps->min_freq_softlimit,
+					rps->max_freq_softlimit)))
+			DRM_DEBUG_DRIVER("Failed to set idle frequency\n");
+	}
+	mutex_unlock(&dev_priv->pcu_lock);
+}
+
+void gen6_rps_idle(struct drm_i915_private *dev_priv)
+{
+	struct intel_rps *rps = &dev_priv->gt_pm.rps;
+
+	/* Flush our bottom-half so that it does not race with us
+	 * setting the idle frequency and so that it is bounded by
+	 * our rpm wakeref. And then disable the interrupts to stop any
+	 * futher RPS reclocking whilst we are asleep.
+	 */
+	gen6_disable_rps_interrupts(dev_priv);
+
+	mutex_lock(&dev_priv->pcu_lock);
+	if (rps->enabled) {
+		if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
+			vlv_set_rps_idle(dev_priv);
+		else
+			gen6_set_rps(dev_priv, rps->idle_freq);
+		rps->last_adj = 0;
+		I915_WRITE(GEN6_PMINTRMSK,
+			   gen6_sanitize_rps_pm_mask(dev_priv, ~0));
+	}
+	mutex_unlock(&dev_priv->pcu_lock);
+}
+
+void gen6_rps_boost(struct drm_i915_gem_request *rq,
+		    struct intel_rps_client *rps_client)
+{
+	struct intel_rps *rps = &rq->i915->gt_pm.rps;
+	unsigned long flags;
+	bool boost;
+
+	/* This is intentionally racy! We peek at the state here, then
+	 * validate inside the RPS worker.
+	 */
+	if (!rps->enabled)
+		return;
+
+	boost = false;
+	spin_lock_irqsave(&rq->lock, flags);
+	if (!rq->waitboost && !i915_gem_request_completed(rq)) {
+		atomic_inc(&rps->num_waiters);
+		rq->waitboost = true;
+		boost = true;
+	}
+	spin_unlock_irqrestore(&rq->lock, flags);
+	if (!boost)
+		return;
+
+	if (READ_ONCE(rps->cur_freq) < rps->boost_freq)
+		schedule_work(&rps->work);
+
+	atomic_inc(rps_client ? &rps_client->boosts : &rps->boosts);
+}
+
+int intel_set_rps(struct drm_i915_private *dev_priv, u8 val)
+{
+	struct intel_rps *rps = &dev_priv->gt_pm.rps;
+	int err;
+
+	lockdep_assert_held(&dev_priv->pcu_lock);
+	GEM_BUG_ON(val > rps->max_freq);
+	GEM_BUG_ON(val < rps->min_freq);
+
+	if (!rps->enabled) {
+		rps->cur_freq = val;
+		return 0;
+	}
+
+	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
+		err = valleyview_set_rps(dev_priv, val);
+	else
+		err = gen6_set_rps(dev_priv, val);
+
+	return err;
+}
+
+static void gen9_disable_rc6(struct drm_i915_private *dev_priv)
+{
+	I915_WRITE(GEN6_RC_CONTROL, 0);
+	I915_WRITE(GEN9_PG_ENABLE, 0);
+}
+
+static void gen9_disable_rps(struct drm_i915_private *dev_priv)
+{
+	I915_WRITE(GEN6_RP_CONTROL, 0);
+}
+
+static void gen6_disable_rc6(struct drm_i915_private *dev_priv)
+{
+	I915_WRITE(GEN6_RC_CONTROL, 0);
+}
+
+static void gen6_disable_rps(struct drm_i915_private *dev_priv)
+{
+	I915_WRITE(GEN6_RPNSWREQ, 1 << 31);
+	I915_WRITE(GEN6_RP_CONTROL, 0);
+}
+
+static void cherryview_disable_rc6(struct drm_i915_private *dev_priv)
+{
+	I915_WRITE(GEN6_RC_CONTROL, 0);
+}
+
+static void cherryview_disable_rps(struct drm_i915_private *dev_priv)
+{
+	I915_WRITE(GEN6_RP_CONTROL, 0);
+}
+
+static void valleyview_disable_rc6(struct drm_i915_private *dev_priv)
+{
+	/* We're doing forcewake before Disabling RC6,
+	 * This what the BIOS expects when going into suspend */
+	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
+
+	I915_WRITE(GEN6_RC_CONTROL, 0);
+
+	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
+}
+
+static void valleyview_disable_rps(struct drm_i915_private *dev_priv)
+{
+	I915_WRITE(GEN6_RP_CONTROL, 0);
+}
+
+static bool bxt_check_bios_rc6_setup(struct drm_i915_private *dev_priv)
+{
+	struct i915_ggtt *ggtt = &dev_priv->ggtt;
+	bool enable_rc6 = true;
+	unsigned long rc6_ctx_base;
+	u32 rc_ctl;
+	int rc_sw_target;
+
+	rc_ctl = I915_READ(GEN6_RC_CONTROL);
+	rc_sw_target = (I915_READ(GEN6_RC_STATE) & RC_SW_TARGET_STATE_MASK) >>
+		       RC_SW_TARGET_STATE_SHIFT;
+	DRM_DEBUG_DRIVER("BIOS enabled RC states: "
+			 "HW_CTRL %s HW_RC6 %s SW_TARGET_STATE %x\n",
+			 onoff(rc_ctl & GEN6_RC_CTL_HW_ENABLE),
+			 onoff(rc_ctl & GEN6_RC_CTL_RC6_ENABLE),
+			 rc_sw_target);
+
+	if (!(I915_READ(RC6_LOCATION) & RC6_CTX_IN_DRAM)) {
+		DRM_DEBUG_DRIVER("RC6 Base location not set properly.\n");
+		enable_rc6 = false;
+	}
+
+	/*
+	 * The exact context size is not known for BXT, so assume a page size
+	 * for this check.
+	 */
+	rc6_ctx_base = I915_READ(RC6_CTX_BASE) & RC6_CTX_BASE_MASK;
+	if (!((rc6_ctx_base >= ggtt->stolen_reserved_base) &&
+	      (rc6_ctx_base + PAGE_SIZE <= ggtt->stolen_reserved_base +
+					ggtt->stolen_reserved_size))) {
+		DRM_DEBUG_DRIVER("RC6 Base address not as expected.\n");
+		enable_rc6 = false;
+	}
+
+	if (!(((I915_READ(PWRCTX_MAXCNT_RCSUNIT) & IDLE_TIME_MASK) > 1) &&
+	      ((I915_READ(PWRCTX_MAXCNT_VCSUNIT0) & IDLE_TIME_MASK) > 1) &&
+	      ((I915_READ(PWRCTX_MAXCNT_BCSUNIT) & IDLE_TIME_MASK) > 1) &&
+	      ((I915_READ(PWRCTX_MAXCNT_VECSUNIT) & IDLE_TIME_MASK) > 1))) {
+		DRM_DEBUG_DRIVER("Engine Idle wait time not set properly.\n");
+		enable_rc6 = false;
+	}
+
+	if (!I915_READ(GEN8_PUSHBUS_CONTROL) ||
+	    !I915_READ(GEN8_PUSHBUS_ENABLE) ||
+	    !I915_READ(GEN8_PUSHBUS_SHIFT)) {
+		DRM_DEBUG_DRIVER("Pushbus not setup properly.\n");
+		enable_rc6 = false;
+	}
+
+	if (!I915_READ(GEN6_GFXPAUSE)) {
+		DRM_DEBUG_DRIVER("GFX pause not setup properly.\n");
+		enable_rc6 = false;
+	}
+
+	if (!I915_READ(GEN8_MISC_CTRL0)) {
+		DRM_DEBUG_DRIVER("GPM control not setup properly.\n");
+		enable_rc6 = false;
+	}
+
+	return enable_rc6;
+}
+
+static bool sanitize_rc6(struct drm_i915_private *i915)
+{
+	struct intel_device_info *info = mkwrite_device_info(i915);
+
+	/* Powersaving is controlled by the host when inside a VM */
+	if (intel_vgpu_active(i915))
+		info->has_rc6 = 0;
+
+	if (info->has_rc6 &&
+	    IS_GEN9_LP(i915) && !bxt_check_bios_rc6_setup(i915)) {
+		DRM_INFO("RC6 disabled by BIOS\n");
+		info->has_rc6 = 0;
+	}
+
+	/*
+	 * We assume that we do not have any deep rc6 levels if we don't have
+	 * have the previous rc6 level supported, i.e. we use HAS_RC6()
+	 * as the initial coarse check for rc6 in general, moving on to
+	 * progressively finer/deeper levels.
+	 */
+	if (!info->has_rc6 && info->has_rc6p)
+		info->has_rc6p = 0;
+
+	return info->has_rc6;
+}
+
+static void gen6_init_rps_frequencies(struct drm_i915_private *dev_priv)
+{
+	struct intel_rps *rps = &dev_priv->gt_pm.rps;
+
+	/* All of these values are in units of 50MHz */
+
+	/* static values from HW: RP0 > RP1 > RPn (min_freq) */
+	if (IS_GEN9_LP(dev_priv)) {
+		u32 rp_state_cap = I915_READ(BXT_RP_STATE_CAP);
+		rps->rp0_freq = (rp_state_cap >> 16) & 0xff;
+		rps->rp1_freq = (rp_state_cap >>  8) & 0xff;
+		rps->min_freq = (rp_state_cap >>  0) & 0xff;
+	} else {
+		u32 rp_state_cap = I915_READ(GEN6_RP_STATE_CAP);
+		rps->rp0_freq = (rp_state_cap >>  0) & 0xff;
+		rps->rp1_freq = (rp_state_cap >>  8) & 0xff;
+		rps->min_freq = (rp_state_cap >> 16) & 0xff;
+	}
+	/* hw_max = RP0 until we check for overclocking */
+	rps->max_freq = rps->rp0_freq;
+
+	rps->efficient_freq = rps->rp1_freq;
+	if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv) ||
+	    IS_GEN9_BC(dev_priv) || IS_CANNONLAKE(dev_priv)) {
+		u32 ddcc_status = 0;
+
+		if (sandybridge_pcode_read(dev_priv,
+					   HSW_PCODE_DYNAMIC_DUTY_CYCLE_CONTROL,
+					   &ddcc_status) == 0)
+			rps->efficient_freq =
+				clamp_t(u8,
+					((ddcc_status >> 8) & 0xff),
+					rps->min_freq,
+					rps->max_freq);
+	}
+
+	if (IS_GEN9_BC(dev_priv) || IS_CANNONLAKE(dev_priv)) {
+		/* Store the frequency values in 16.66 MHZ units, which is
+		 * the natural hardware unit for SKL
+		 */
+		rps->rp0_freq *= GEN9_FREQ_SCALER;
+		rps->rp1_freq *= GEN9_FREQ_SCALER;
+		rps->min_freq *= GEN9_FREQ_SCALER;
+		rps->max_freq *= GEN9_FREQ_SCALER;
+		rps->efficient_freq *= GEN9_FREQ_SCALER;
+	}
+}
+
+static void reset_rps(struct drm_i915_private *dev_priv,
+		      int (*set)(struct drm_i915_private *, u8))
+{
+	struct intel_rps *rps = &dev_priv->gt_pm.rps;
+	u8 freq = rps->cur_freq;
+
+	/* force a reset */
+	rps->power = -1;
+	rps->cur_freq = -1;
+
+	if (set(dev_priv, freq))
+		DRM_ERROR("Failed to reset RPS to initial values\n");
+}
+
+/* See the Gen9_GT_PM_Programming_Guide doc for the below */
+static void gen9_enable_rps(struct drm_i915_private *dev_priv)
+{
+	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
+
+	/* Program defaults and thresholds for RPS */
+	if (IS_GEN9(dev_priv))
+		I915_WRITE(GEN6_RC_VIDEO_FREQ,
+			GEN9_FREQUENCY(dev_priv->gt_pm.rps.rp1_freq));
+
+	/* 1 second timeout*/
+	I915_WRITE(GEN6_RP_DOWN_TIMEOUT,
+		GT_INTERVAL_FROM_US(dev_priv, 1000000));
+
+	I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 0xa);
+
+	/* Leaning on the below call to gen6_set_rps to program/setup the
+	 * Up/Down EI & threshold registers, as well as the RP_CONTROL,
+	 * RP_INTERRUPT_LIMITS & RPNSWREQ registers */
+	reset_rps(dev_priv, gen6_set_rps);
+
+	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
+}
+
+static void gen9_enable_rc6(struct drm_i915_private *dev_priv)
+{
+	struct intel_engine_cs *engine;
+	enum intel_engine_id id;
+	u32 rc6_mode;
+
+	/* 1a: Software RC state - RC0 */
+	I915_WRITE(GEN6_RC_STATE, 0);
+
+	/* 1b: Get forcewake during program sequence. Although the driver
+	 * hasn't enabled a state yet where we need forcewake, BIOS may have.*/
+	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
+
+	/* 2a: Disable RC states. */
+	I915_WRITE(GEN6_RC_CONTROL, 0);
+
+	/* 2b: Program RC6 thresholds.*/
+	if (INTEL_GEN(dev_priv) >= 10) {
+		I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 54 << 16 | 85);
+		I915_WRITE(GEN10_MEDIA_WAKE_RATE_LIMIT, 150);
+	} else if (IS_SKYLAKE(dev_priv)) {
+		/*
+		 * WaRsDoubleRc6WrlWithCoarsePowerGating:skl Doubling WRL only
+		 * when CPG is enabled
+		 */
+		I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 108 << 16);
+	} else {
+		I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 54 << 16);
+	}
+
+	I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000); /* 12500 * 1280ns */
+	I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25); /* 25 * 1280ns */
+	for_each_engine(engine, dev_priv, id)
+		I915_WRITE(RING_MAX_IDLE(engine->mmio_base), 10);
+
+	if (HAS_GUC(dev_priv))
+		I915_WRITE(GUC_MAX_IDLE_COUNT, 0xA);
+
+	I915_WRITE(GEN6_RC_SLEEP, 0);
+
+	/* 2c: Program Coarse Power Gating Policies. */
+	I915_WRITE(GEN9_MEDIA_PG_IDLE_HYSTERESIS, 25);
+	I915_WRITE(GEN9_RENDER_PG_IDLE_HYSTERESIS, 25);
+
+	/* 3a: Enable RC6 */
+	I915_WRITE(GEN6_RC6_THRESHOLD, 37500); /* 37.5/125ms per EI */
+
+	/* WaRsUseTimeoutMode:cnl (pre-prod) */
+	if (IS_CNL_REVID(dev_priv, CNL_REVID_A0, CNL_REVID_C0))
+		rc6_mode = GEN7_RC_CTL_TO_MODE;
+	else
+		rc6_mode = GEN6_RC_CTL_EI_MODE(1);
+
+	I915_WRITE(GEN6_RC_CONTROL,
+		   GEN6_RC_CTL_HW_ENABLE |
+		   GEN6_RC_CTL_RC6_ENABLE |
+		   rc6_mode);
+
+	/*
+	 * 3b: Enable Coarse Power Gating only when RC6 is enabled.
+	 * WaRsDisableCoarsePowerGating:skl,bxt - Render/Media PG need to be disabled with RC6.
+	 */
+	if (NEEDS_WaRsDisableCoarsePowerGating(dev_priv))
+		I915_WRITE(GEN9_PG_ENABLE, 0);
+	else
+		I915_WRITE(GEN9_PG_ENABLE,
+			   GEN9_RENDER_PG_ENABLE | GEN9_MEDIA_PG_ENABLE);
+
+	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
+}
+
+static void gen8_enable_rc6(struct drm_i915_private *dev_priv)
+{
+	struct intel_engine_cs *engine;
+	enum intel_engine_id id;
+
+	/* 1a: Software RC state - RC0 */
+	I915_WRITE(GEN6_RC_STATE, 0);
+
+	/* 1b: Get forcewake during program sequence. Although the driver
+	 * hasn't enabled a state yet where we need forcewake, BIOS may have.*/
+	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
+
+	/* 2a: Disable RC states. */
+	I915_WRITE(GEN6_RC_CONTROL, 0);
+
+	/* 2b: Program RC6 thresholds.*/
+	I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 40 << 16);
+	I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000); /* 12500 * 1280ns */
+	I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25); /* 25 * 1280ns */
+	for_each_engine(engine, dev_priv, id)
+		I915_WRITE(RING_MAX_IDLE(engine->mmio_base), 10);
+	I915_WRITE(GEN6_RC_SLEEP, 0);
+	I915_WRITE(GEN6_RC6_THRESHOLD, 625); /* 800us/1.28 for TO */
+
+	/* 3: Enable RC6 */
+
+	I915_WRITE(GEN6_RC_CONTROL,
+		   GEN6_RC_CTL_HW_ENABLE |
+		   GEN7_RC_CTL_TO_MODE |
+		   GEN6_RC_CTL_RC6_ENABLE);
+
+	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
+}
+
+static void gen8_enable_rps(struct drm_i915_private *dev_priv)
+{
+	struct intel_rps *rps = &dev_priv->gt_pm.rps;
+
+	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
+
+	/* 1 Program defaults and thresholds for RPS*/
+	I915_WRITE(GEN6_RPNSWREQ,
+		   HSW_FREQUENCY(rps->rp1_freq));
+	I915_WRITE(GEN6_RC_VIDEO_FREQ,
+		   HSW_FREQUENCY(rps->rp1_freq));
+	/* NB: Docs say 1s, and 1000000 - which aren't equivalent */
+	I915_WRITE(GEN6_RP_DOWN_TIMEOUT, 100000000 / 128); /* 1 second timeout */
+
+	/* Docs recommend 900MHz, and 300 MHz respectively */
+	I915_WRITE(GEN6_RP_INTERRUPT_LIMITS,
+		   rps->max_freq_softlimit << 24 |
+		   rps->min_freq_softlimit << 16);
+
+	I915_WRITE(GEN6_RP_UP_THRESHOLD, 7600000 / 128); /* 76ms busyness per EI, 90% */
+	I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 31300000 / 128); /* 313ms busyness per EI, 70%*/
+	I915_WRITE(GEN6_RP_UP_EI, 66000); /* 84.48ms, XXX: random? */
+	I915_WRITE(GEN6_RP_DOWN_EI, 350000); /* 448ms, XXX: random? */
+
+	I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10);
+
+	/* 2: Enable RPS */
+	I915_WRITE(GEN6_RP_CONTROL,
+		   GEN6_RP_MEDIA_TURBO |
+		   GEN6_RP_MEDIA_HW_NORMAL_MODE |
+		   GEN6_RP_MEDIA_IS_GFX |
+		   GEN6_RP_ENABLE |
+		   GEN6_RP_UP_BUSY_AVG |
+		   GEN6_RP_DOWN_IDLE_AVG);
+
+	reset_rps(dev_priv, gen6_set_rps);
+
+	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
+}
+
+static void gen6_enable_rc6(struct drm_i915_private *dev_priv)
+{
+	struct intel_engine_cs *engine;
+	enum intel_engine_id id;
+	u32 rc6vids, rc6_mask;
+	u32 gtfifodbg;
+	int ret;
+
+	I915_WRITE(GEN6_RC_STATE, 0);
+
+	/* Clear the DBG now so we don't confuse earlier errors */
+	gtfifodbg = I915_READ(GTFIFODBG);
+	if (gtfifodbg) {
+		DRM_ERROR("GT fifo had a previous error %x\n", gtfifodbg);
+		I915_WRITE(GTFIFODBG, gtfifodbg);
+	}
+
+	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
+
+	/* disable the counters and set deterministic thresholds */
+	I915_WRITE(GEN6_RC_CONTROL, 0);
+
+	I915_WRITE(GEN6_RC1_WAKE_RATE_LIMIT, 1000 << 16);
+	I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 40 << 16 | 30);
+	I915_WRITE(GEN6_RC6pp_WAKE_RATE_LIMIT, 30);
+	I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000);
+	I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25);
+
+	for_each_engine(engine, dev_priv, id)
+		I915_WRITE(RING_MAX_IDLE(engine->mmio_base), 10);
+
+	I915_WRITE(GEN6_RC_SLEEP, 0);
+	I915_WRITE(GEN6_RC1e_THRESHOLD, 1000);
+	if (IS_IVYBRIDGE(dev_priv))
+		I915_WRITE(GEN6_RC6_THRESHOLD, 125000);
+	else
+		I915_WRITE(GEN6_RC6_THRESHOLD, 50000);
+	I915_WRITE(GEN6_RC6p_THRESHOLD, 150000);
+	I915_WRITE(GEN6_RC6pp_THRESHOLD, 64000); /* unused */
+
+	/* We don't use those on Haswell */
+	rc6_mask = GEN6_RC_CTL_RC6_ENABLE;
+	if (HAS_RC6p(dev_priv))
+		rc6_mask |= GEN6_RC_CTL_RC6p_ENABLE;
+	if (HAS_RC6pp(dev_priv))
+		rc6_mask |= GEN6_RC_CTL_RC6pp_ENABLE;
+	I915_WRITE(GEN6_RC_CONTROL,
+		   rc6_mask |
+		   GEN6_RC_CTL_EI_MODE(1) |
+		   GEN6_RC_CTL_HW_ENABLE);
+
+	rc6vids = 0;
+	ret = sandybridge_pcode_read(dev_priv, GEN6_PCODE_READ_RC6VIDS, &rc6vids);
+	if (IS_GEN6(dev_priv) && ret) {
+		DRM_DEBUG_DRIVER("Couldn't check for BIOS workaround\n");
+	} else if (IS_GEN6(dev_priv) && (GEN6_DECODE_RC6_VID(rc6vids & 0xff) < 450)) {
+		DRM_DEBUG_DRIVER("You should update your BIOS. Correcting minimum rc6 voltage (%dmV->%dmV)\n",
+			  GEN6_DECODE_RC6_VID(rc6vids & 0xff), 450);
+		rc6vids &= 0xffff00;
+		rc6vids |= GEN6_ENCODE_RC6_VID(450);
+		ret = sandybridge_pcode_write(dev_priv, GEN6_PCODE_WRITE_RC6VIDS, rc6vids);
+		if (ret)
+			DRM_ERROR("Couldn't fix incorrect rc6 voltage\n");
+	}
+
+	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
+}
+
+static void gen6_enable_rps(struct drm_i915_private *dev_priv)
+{
+	/* Here begins a magic sequence of register writes to enable
+	 * auto-downclocking.
+	 *
+	 * Perhaps there might be some value in exposing these to
+	 * userspace...
+	 */
+	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
+
+	/* Power down if completely idle for over 50ms */
+	I915_WRITE(GEN6_RP_DOWN_TIMEOUT, 50000);
+	I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10);
+
+	reset_rps(dev_priv, gen6_set_rps);
+
+	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
+}
+
+static void gen6_update_ring_freq(struct drm_i915_private *dev_priv)
+{
+	struct intel_rps *rps = &dev_priv->gt_pm.rps;
+	int min_freq = 15;
+	unsigned int gpu_freq;
+	unsigned int max_ia_freq, min_ring_freq;
+	unsigned int max_gpu_freq, min_gpu_freq;
+	int scaling_factor = 180;
+	struct cpufreq_policy *policy;
+
+	WARN_ON(!mutex_is_locked(&dev_priv->pcu_lock));
+
+	policy = cpufreq_cpu_get(0);
+	if (policy) {
+		max_ia_freq = policy->cpuinfo.max_freq;
+		cpufreq_cpu_put(policy);
+	} else {
+		/*
+		 * Default to measured freq if none found, PCU will ensure we
+		 * don't go over
+		 */
+		max_ia_freq = tsc_khz;
+	}
+
+	/* Convert from kHz to MHz */
+	max_ia_freq /= 1000;
+
+	min_ring_freq = I915_READ(DCLK) & 0xf;
+	/* convert DDR frequency from units of 266.6MHz to bandwidth */
+	min_ring_freq = mult_frac(min_ring_freq, 8, 3);
+
+	if (IS_GEN9_BC(dev_priv) || IS_CANNONLAKE(dev_priv)) {
+		/* Convert GT frequency to 50 HZ units */
+		min_gpu_freq = rps->min_freq / GEN9_FREQ_SCALER;
+		max_gpu_freq = rps->max_freq / GEN9_FREQ_SCALER;
+	} else {
+		min_gpu_freq = rps->min_freq;
+		max_gpu_freq = rps->max_freq;
+	}
+
+	/*
+	 * For each potential GPU frequency, load a ring frequency we'd like
+	 * to use for memory access.  We do this by specifying the IA frequency
+	 * the PCU should use as a reference to determine the ring frequency.
+	 */
+	for (gpu_freq = max_gpu_freq; gpu_freq >= min_gpu_freq; gpu_freq--) {
+		int diff = max_gpu_freq - gpu_freq;
+		unsigned int ia_freq = 0, ring_freq = 0;
+
+		if (IS_GEN9_BC(dev_priv) || IS_CANNONLAKE(dev_priv)) {
+			/*
+			 * ring_freq = 2 * GT. ring_freq is in 100MHz units
+			 * No floor required for ring frequency on SKL.
+			 */
+			ring_freq = gpu_freq;
+		} else if (INTEL_INFO(dev_priv)->gen >= 8) {
+			/* max(2 * GT, DDR). NB: GT is 50MHz units */
+			ring_freq = max(min_ring_freq, gpu_freq);
+		} else if (IS_HASWELL(dev_priv)) {
+			ring_freq = mult_frac(gpu_freq, 5, 4);
+			ring_freq = max(min_ring_freq, ring_freq);
+			/* leave ia_freq as the default, chosen by cpufreq */
+		} else {
+			/* On older processors, there is no separate ring
+			 * clock domain, so in order to boost the bandwidth
+			 * of the ring, we need to upclock the CPU (ia_freq).
+			 *
+			 * For GPU frequencies less than 750MHz,
+			 * just use the lowest ring freq.
+			 */
+			if (gpu_freq < min_freq)
+				ia_freq = 800;
+			else
+				ia_freq = max_ia_freq - ((diff * scaling_factor) / 2);
+			ia_freq = DIV_ROUND_CLOSEST(ia_freq, 100);
+		}
+
+		sandybridge_pcode_write(dev_priv,
+					GEN6_PCODE_WRITE_MIN_FREQ_TABLE,
+					ia_freq << GEN6_PCODE_FREQ_IA_RATIO_SHIFT |
+					ring_freq << GEN6_PCODE_FREQ_RING_RATIO_SHIFT |
+					gpu_freq);
+	}
+}
+
+static int cherryview_rps_max_freq(struct drm_i915_private *dev_priv)
+{
+	u32 val, rp0;
+
+	val = vlv_punit_read(dev_priv, FB_GFX_FMAX_AT_VMAX_FUSE);
+
+	switch (INTEL_INFO(dev_priv)->sseu.eu_total) {
+	case 8:
+		/* (2 * 4) config */
+		rp0 = (val >> FB_GFX_FMAX_AT_VMAX_2SS4EU_FUSE_SHIFT);
+		break;
+	case 12:
+		/* (2 * 6) config */
+		rp0 = (val >> FB_GFX_FMAX_AT_VMAX_2SS6EU_FUSE_SHIFT);
+		break;
+	case 16:
+		/* (2 * 8) config */
+	default:
+		/* Setting (2 * 8) Min RP0 for any other combination */
+		rp0 = (val >> FB_GFX_FMAX_AT_VMAX_2SS8EU_FUSE_SHIFT);
+		break;
+	}
+
+	rp0 = (rp0 & FB_GFX_FREQ_FUSE_MASK);
+
+	return rp0;
+}
+
+static int cherryview_rps_rpe_freq(struct drm_i915_private *dev_priv)
+{
+	u32 val, rpe;
+
+	val = vlv_punit_read(dev_priv, PUNIT_GPU_DUTYCYCLE_REG);
+	rpe = (val >> PUNIT_GPU_DUTYCYCLE_RPE_FREQ_SHIFT) & PUNIT_GPU_DUTYCYCLE_RPE_FREQ_MASK;
+
+	return rpe;
+}
+
+static int cherryview_rps_guar_freq(struct drm_i915_private *dev_priv)
+{
+	u32 val, rp1;
+
+	val = vlv_punit_read(dev_priv, FB_GFX_FMAX_AT_VMAX_FUSE);
+	rp1 = (val & FB_GFX_FREQ_FUSE_MASK);
+
+	return rp1;
+}
+
+static u32 cherryview_rps_min_freq(struct drm_i915_private *dev_priv)
+{
+	u32 val, rpn;
+
+	val = vlv_punit_read(dev_priv, FB_GFX_FMIN_AT_VMIN_FUSE);
+	rpn = ((val >> FB_GFX_FMIN_AT_VMIN_FUSE_SHIFT) &
+		       FB_GFX_FREQ_FUSE_MASK);
+
+	return rpn;
+}
+
+static int valleyview_rps_guar_freq(struct drm_i915_private *dev_priv)
+{
+	u32 val, rp1;
+
+	val = vlv_nc_read(dev_priv, IOSF_NC_FB_GFX_FREQ_FUSE);
+
+	rp1 = (val & FB_GFX_FGUARANTEED_FREQ_FUSE_MASK) >> FB_GFX_FGUARANTEED_FREQ_FUSE_SHIFT;
+
+	return rp1;
+}
+
+static int valleyview_rps_max_freq(struct drm_i915_private *dev_priv)
+{
+	u32 val, rp0;
+
+	val = vlv_nc_read(dev_priv, IOSF_NC_FB_GFX_FREQ_FUSE);
+
+	rp0 = (val & FB_GFX_MAX_FREQ_FUSE_MASK) >> FB_GFX_MAX_FREQ_FUSE_SHIFT;
+	/* Clamp to max */
+	rp0 = min_t(u32, rp0, 0xea);
+
+	return rp0;
+}
+
+static int valleyview_rps_rpe_freq(struct drm_i915_private *dev_priv)
+{
+	u32 val, rpe;
+
+	val = vlv_nc_read(dev_priv, IOSF_NC_FB_GFX_FMAX_FUSE_LO);
+	rpe = (val & FB_FMAX_VMIN_FREQ_LO_MASK) >> FB_FMAX_VMIN_FREQ_LO_SHIFT;
+	val = vlv_nc_read(dev_priv, IOSF_NC_FB_GFX_FMAX_FUSE_HI);
+	rpe |= (val & FB_FMAX_VMIN_FREQ_HI_MASK) << 5;
+
+	return rpe;
+}
+
+static int valleyview_rps_min_freq(struct drm_i915_private *dev_priv)
+{
+	u32 val;
+
+	val = vlv_punit_read(dev_priv, PUNIT_REG_GPU_LFM) & 0xff;
+	/*
+	 * According to the BYT Punit GPU turbo HAS 1.1.6.3 the minimum value
+	 * for the minimum frequency in GPLL mode is 0xc1. Contrary to this on
+	 * a BYT-M B0 the above register contains 0xbf. Moreover when setting
+	 * a frequency Punit will not allow values below 0xc0. Clamp it 0xc0
+	 * to make sure it matches what Punit accepts.
+	 */
+	return max_t(u32, val, 0xc0);
+}
+
+/* Check that the pctx buffer wasn't move under us. */
+static void valleyview_check_pctx(struct drm_i915_private *dev_priv)
+{
+	unsigned long pctx_addr = I915_READ(VLV_PCBR) & ~4095;
+
+	WARN_ON(pctx_addr != dev_priv->mm.stolen_base +
+			     dev_priv->vlv_pctx->stolen->start);
+}
+
+
+/* Check that the pcbr address is not empty. */
+static void cherryview_check_pctx(struct drm_i915_private *dev_priv)
+{
+	unsigned long pctx_addr = I915_READ(VLV_PCBR) & ~4095;
+
+	WARN_ON((pctx_addr >> VLV_PCBR_ADDR_SHIFT) == 0);
+}
+
+static void cherryview_setup_pctx(struct drm_i915_private *dev_priv)
+{
+	struct i915_ggtt *ggtt = &dev_priv->ggtt;
+	unsigned long pctx_paddr, paddr;
+	u32 pcbr;
+	int pctx_size = 32*1024;
+
+	pcbr = I915_READ(VLV_PCBR);
+	if ((pcbr >> VLV_PCBR_ADDR_SHIFT) == 0) {
+		DRM_DEBUG_DRIVER("BIOS didn't set up PCBR, fixing up\n");
+		paddr = (dev_priv->mm.stolen_base +
+			 (ggtt->stolen_size - pctx_size));
+
+		pctx_paddr = (paddr & (~4095));
+		I915_WRITE(VLV_PCBR, pctx_paddr);
+	}
+
+	DRM_DEBUG_DRIVER("PCBR: 0x%08x\n", I915_READ(VLV_PCBR));
+}
+
+static void valleyview_setup_pctx(struct drm_i915_private *dev_priv)
+{
+	struct drm_i915_gem_object *pctx;
+	unsigned long pctx_paddr;
+	u32 pcbr;
+	int pctx_size = 24*1024;
+
+	pcbr = I915_READ(VLV_PCBR);
+	if (pcbr) {
+		/* BIOS set it up already, grab the pre-alloc'd space */
+		int pcbr_offset;
+
+		pcbr_offset = (pcbr & (~4095)) - dev_priv->mm.stolen_base;
+		pctx = i915_gem_object_create_stolen_for_preallocated(dev_priv,
+								      pcbr_offset,
+								      I915_GTT_OFFSET_NONE,
+								      pctx_size);
+		goto out;
+	}
+
+	DRM_DEBUG_DRIVER("BIOS didn't set up PCBR, fixing up\n");
+
+	/*
+	 * From the Gunit register HAS:
+	 * The Gfx driver is expected to program this register and ensure
+	 * proper allocation within Gfx stolen memory.  For example, this
+	 * register should be programmed such than the PCBR range does not
+	 * overlap with other ranges, such as the frame buffer, protected
+	 * memory, or any other relevant ranges.
+	 */
+	pctx = i915_gem_object_create_stolen(dev_priv, pctx_size);
+	if (!pctx) {
+		DRM_DEBUG("not enough stolen space for PCTX, disabling\n");
+		goto out;
+	}
+
+	pctx_paddr = dev_priv->mm.stolen_base + pctx->stolen->start;
+	I915_WRITE(VLV_PCBR, pctx_paddr);
+
+out:
+	DRM_DEBUG_DRIVER("PCBR: 0x%08x\n", I915_READ(VLV_PCBR));
+	dev_priv->vlv_pctx = pctx;
+}
+
+static void valleyview_cleanup_pctx(struct drm_i915_private *dev_priv)
+{
+	if (WARN_ON(!dev_priv->vlv_pctx))
+		return;
+
+	i915_gem_object_put(dev_priv->vlv_pctx);
+	dev_priv->vlv_pctx = NULL;
+}
+
+static void vlv_init_gpll_ref_freq(struct drm_i915_private *dev_priv)
+{
+	dev_priv->gt_pm.rps.gpll_ref_freq =
+		vlv_get_cck_clock(dev_priv, "GPLL ref",
+				  CCK_GPLL_CLOCK_CONTROL,
+				  dev_priv->czclk_freq);
+
+	DRM_DEBUG_DRIVER("GPLL reference freq: %d kHz\n",
+			 dev_priv->gt_pm.rps.gpll_ref_freq);
+}
+
+static void valleyview_init_gt_powersave(struct drm_i915_private *dev_priv)
+{
+	struct intel_rps *rps = &dev_priv->gt_pm.rps;
+	u32 val;
+
+	valleyview_setup_pctx(dev_priv);
+
+	vlv_init_gpll_ref_freq(dev_priv);
+
+	val = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS);
+	switch ((val >> 6) & 3) {
+	case 0:
+	case 1:
+		dev_priv->mem_freq = 800;
+		break;
+	case 2:
+		dev_priv->mem_freq = 1066;
+		break;
+	case 3:
+		dev_priv->mem_freq = 1333;
+		break;
+	}
+	DRM_DEBUG_DRIVER("DDR speed: %d MHz\n", dev_priv->mem_freq);
+
+	rps->max_freq = valleyview_rps_max_freq(dev_priv);
+	rps->rp0_freq = rps->max_freq;
+	DRM_DEBUG_DRIVER("max GPU freq: %d MHz (%u)\n",
+			 intel_gpu_freq(dev_priv, rps->max_freq),
+			 rps->max_freq);
+
+	rps->efficient_freq = valleyview_rps_rpe_freq(dev_priv);
+	DRM_DEBUG_DRIVER("RPe GPU freq: %d MHz (%u)\n",
+			 intel_gpu_freq(dev_priv, rps->efficient_freq),
+			 rps->efficient_freq);
+
+	rps->rp1_freq = valleyview_rps_guar_freq(dev_priv);
+	DRM_DEBUG_DRIVER("RP1(Guar Freq) GPU freq: %d MHz (%u)\n",
+			 intel_gpu_freq(dev_priv, rps->rp1_freq),
+			 rps->rp1_freq);
+
+	rps->min_freq = valleyview_rps_min_freq(dev_priv);
+	DRM_DEBUG_DRIVER("min GPU freq: %d MHz (%u)\n",
+			 intel_gpu_freq(dev_priv, rps->min_freq),
+			 rps->min_freq);
+}
+
+static void cherryview_init_gt_powersave(struct drm_i915_private *dev_priv)
+{
+	struct intel_rps *rps = &dev_priv->gt_pm.rps;
+	u32 val;
+
+	cherryview_setup_pctx(dev_priv);
+
+	vlv_init_gpll_ref_freq(dev_priv);
+
+	mutex_lock(&dev_priv->sb_lock);
+	val = vlv_cck_read(dev_priv, CCK_FUSE_REG);
+	mutex_unlock(&dev_priv->sb_lock);
+
+	switch ((val >> 2) & 0x7) {
+	case 3:
+		dev_priv->mem_freq = 2000;
+		break;
+	default:
+		dev_priv->mem_freq = 1600;
+		break;
+	}
+	DRM_DEBUG_DRIVER("DDR speed: %d MHz\n", dev_priv->mem_freq);
+
+	rps->max_freq = cherryview_rps_max_freq(dev_priv);
+	rps->rp0_freq = rps->max_freq;
+	DRM_DEBUG_DRIVER("max GPU freq: %d MHz (%u)\n",
+			 intel_gpu_freq(dev_priv, rps->max_freq),
+			 rps->max_freq);
+
+	rps->efficient_freq = cherryview_rps_rpe_freq(dev_priv);
+	DRM_DEBUG_DRIVER("RPe GPU freq: %d MHz (%u)\n",
+			 intel_gpu_freq(dev_priv, rps->efficient_freq),
+			 rps->efficient_freq);
+
+	rps->rp1_freq = cherryview_rps_guar_freq(dev_priv);
+	DRM_DEBUG_DRIVER("RP1(Guar) GPU freq: %d MHz (%u)\n",
+			 intel_gpu_freq(dev_priv, rps->rp1_freq),
+			 rps->rp1_freq);
+
+	rps->min_freq = cherryview_rps_min_freq(dev_priv);
+	DRM_DEBUG_DRIVER("min GPU freq: %d MHz (%u)\n",
+			 intel_gpu_freq(dev_priv, rps->min_freq),
+			 rps->min_freq);
+
+	WARN_ONCE((rps->max_freq | rps->efficient_freq | rps->rp1_freq |
+		   rps->min_freq) & 1,
+		  "Odd GPU freq values\n");
+}
+
+static void valleyview_cleanup_gt_powersave(struct drm_i915_private *dev_priv)
+{
+	valleyview_cleanup_pctx(dev_priv);
+}
+
+static void cherryview_enable_rc6(struct drm_i915_private *dev_priv)
+{
+	struct intel_engine_cs *engine;
+	enum intel_engine_id id;
+	u32 gtfifodbg, rc6_mode, pcbr;
+
+	gtfifodbg = I915_READ(GTFIFODBG) & ~(GT_FIFO_SBDEDICATE_FREE_ENTRY_CHV |
+					     GT_FIFO_FREE_ENTRIES_CHV);
+	if (gtfifodbg) {
+		DRM_DEBUG_DRIVER("GT fifo had a previous error %x\n",
+				 gtfifodbg);
+		I915_WRITE(GTFIFODBG, gtfifodbg);
+	}
+
+	cherryview_check_pctx(dev_priv);
+
+	/* 1a & 1b: Get forcewake during program sequence. Although the driver
+	 * hasn't enabled a state yet where we need forcewake, BIOS may have.*/
+	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
+
+	/*  Disable RC states. */
+	I915_WRITE(GEN6_RC_CONTROL, 0);
+
+	/* 2a: Program RC6 thresholds.*/
+	I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 40 << 16);
+	I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000); /* 12500 * 1280ns */
+	I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25); /* 25 * 1280ns */
+
+	for_each_engine(engine, dev_priv, id)
+		I915_WRITE(RING_MAX_IDLE(engine->mmio_base), 10);
+	I915_WRITE(GEN6_RC_SLEEP, 0);
+
+	/* TO threshold set to 500 us ( 0x186 * 1.28 us) */
+	I915_WRITE(GEN6_RC6_THRESHOLD, 0x186);
+
+	/* Allows RC6 residency counter to work */
+	I915_WRITE(VLV_COUNTER_CONTROL,
+		   _MASKED_BIT_ENABLE(VLV_COUNT_RANGE_HIGH |
+				      VLV_MEDIA_RC6_COUNT_EN |
+				      VLV_RENDER_RC6_COUNT_EN));
+
+	/* For now we assume BIOS is allocating and populating the PCBR  */
+	pcbr = I915_READ(VLV_PCBR);
+
+	/* 3: Enable RC6 */
+	rc6_mode = 0;
+	if (pcbr >> VLV_PCBR_ADDR_SHIFT)
+		rc6_mode = GEN7_RC_CTL_TO_MODE;
+	I915_WRITE(GEN6_RC_CONTROL, rc6_mode);
+
+	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
+}
+
+static void cherryview_enable_rps(struct drm_i915_private *dev_priv)
+{
+	u32 val;
+
+	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
+
+	/* 1: Program defaults and thresholds for RPS*/
+	I915_WRITE(GEN6_RP_DOWN_TIMEOUT, 1000000);
+	I915_WRITE(GEN6_RP_UP_THRESHOLD, 59400);
+	I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 245000);
+	I915_WRITE(GEN6_RP_UP_EI, 66000);
+	I915_WRITE(GEN6_RP_DOWN_EI, 350000);
+
+	I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10);
+
+	/* 2: Enable RPS */
+	I915_WRITE(GEN6_RP_CONTROL,
+		   GEN6_RP_MEDIA_HW_NORMAL_MODE |
+		   GEN6_RP_MEDIA_IS_GFX |
+		   GEN6_RP_ENABLE |
+		   GEN6_RP_UP_BUSY_AVG |
+		   GEN6_RP_DOWN_IDLE_AVG);
+
+	/* Setting Fixed Bias */
+	val = VLV_OVERRIDE_EN |
+		  VLV_SOC_TDP_EN |
+		  CHV_BIAS_CPU_50_SOC_50;
+	vlv_punit_write(dev_priv, VLV_TURBO_SOC_OVERRIDE, val);
+
+	val = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS);
+
+	/* RPS code assumes GPLL is used */
+	WARN_ONCE((val & GPLLENABLE) == 0, "GPLL not enabled\n");
+
+	DRM_DEBUG_DRIVER("GPLL enabled? %s\n", yesno(val & GPLLENABLE));
+	DRM_DEBUG_DRIVER("GPU status: 0x%08x\n", val);
+
+	reset_rps(dev_priv, valleyview_set_rps);
+
+	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
+}
+
+static void valleyview_enable_rc6(struct drm_i915_private *dev_priv)
+{
+	struct intel_engine_cs *engine;
+	enum intel_engine_id id;
+	u32 gtfifodbg;
+
+	valleyview_check_pctx(dev_priv);
+
+	gtfifodbg = I915_READ(GTFIFODBG);
+	if (gtfifodbg) {
+		DRM_DEBUG_DRIVER("GT fifo had a previous error %x\n",
+				 gtfifodbg);
+		I915_WRITE(GTFIFODBG, gtfifodbg);
+	}
+
+	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
+
+	/*  Disable RC states. */
+	I915_WRITE(GEN6_RC_CONTROL, 0);
+
+	I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 0x00280000);
+	I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000);
+	I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25);
+
+	for_each_engine(engine, dev_priv, id)
+		I915_WRITE(RING_MAX_IDLE(engine->mmio_base), 10);
+
+	I915_WRITE(GEN6_RC6_THRESHOLD, 0x557);
+
+	/* Allows RC6 residency counter to work */
+	I915_WRITE(VLV_COUNTER_CONTROL,
+		   _MASKED_BIT_ENABLE(VLV_COUNT_RANGE_HIGH |
+				      VLV_MEDIA_RC0_COUNT_EN |
+				      VLV_RENDER_RC0_COUNT_EN |
+				      VLV_MEDIA_RC6_COUNT_EN |
+				      VLV_RENDER_RC6_COUNT_EN));
+
+	I915_WRITE(GEN6_RC_CONTROL,
+		   GEN7_RC_CTL_TO_MODE | VLV_RC_CTL_CTX_RST_PARALLEL);
+
+	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
+}
+
+static void valleyview_enable_rps(struct drm_i915_private *dev_priv)
+{
+	u32 val;
+
+	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
+
+	I915_WRITE(GEN6_RP_DOWN_TIMEOUT, 1000000);
+	I915_WRITE(GEN6_RP_UP_THRESHOLD, 59400);
+	I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 245000);
+	I915_WRITE(GEN6_RP_UP_EI, 66000);
+	I915_WRITE(GEN6_RP_DOWN_EI, 350000);
+
+	I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10);
+
+	I915_WRITE(GEN6_RP_CONTROL,
+		   GEN6_RP_MEDIA_TURBO |
+		   GEN6_RP_MEDIA_HW_NORMAL_MODE |
+		   GEN6_RP_MEDIA_IS_GFX |
+		   GEN6_RP_ENABLE |
+		   GEN6_RP_UP_BUSY_AVG |
+		   GEN6_RP_DOWN_IDLE_CONT);
+
+	/* Setting Fixed Bias */
+	val = VLV_OVERRIDE_EN |
+		  VLV_SOC_TDP_EN |
+		  VLV_BIAS_CPU_125_SOC_875;
+	vlv_punit_write(dev_priv, VLV_TURBO_SOC_OVERRIDE, val);
+
+	val = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS);
+
+	/* RPS code assumes GPLL is used */
+	WARN_ONCE((val & GPLLENABLE) == 0, "GPLL not enabled\n");
+
+	DRM_DEBUG_DRIVER("GPLL enabled? %s\n", yesno(val & GPLLENABLE));
+	DRM_DEBUG_DRIVER("GPU status: 0x%08x\n", val);
+
+	reset_rps(dev_priv, valleyview_set_rps);
+
+	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
+}
+
+static unsigned long intel_pxfreq(u32 vidfreq)
+{
+	unsigned long freq;
+	int div = (vidfreq & 0x3f0000) >> 16;
+	int post = (vidfreq & 0x3000) >> 12;
+	int pre = (vidfreq & 0x7);
+
+	if (!pre)
+		return 0;
+
+	freq = ((div * 133333) / ((1<<post) * pre));
+
+	return freq;
+}
+
+static const struct cparams {
+	u16 i;
+	u16 t;
+	u16 m;
+	u16 c;
+} cparams[] = {
+	{ 1, 1333, 301, 28664 },
+	{ 1, 1066, 294, 24460 },
+	{ 1, 800, 294, 25192 },
+	{ 0, 1333, 276, 27605 },
+	{ 0, 1066, 276, 27605 },
+	{ 0, 800, 231, 23784 },
+};
+
+static unsigned long __i915_chipset_val(struct drm_i915_private *dev_priv)
+{
+	u64 total_count, diff, ret;
+	u32 count1, count2, count3, m = 0, c = 0;
+	unsigned long now = jiffies_to_msecs(jiffies), diff1;
+	int i;
+
+	lockdep_assert_held(&mchdev_lock);
+
+	diff1 = now - dev_priv->ips.last_time1;
+
+	/* Prevent division-by-zero if we are asking too fast.
+	 * Also, we don't get interesting results if we are polling
+	 * faster than once in 10ms, so just return the saved value
+	 * in such cases.
+	 */
+	if (diff1 <= 10)
+		return dev_priv->ips.chipset_power;
+
+	count1 = I915_READ(DMIEC);
+	count2 = I915_READ(DDREC);
+	count3 = I915_READ(CSIEC);
+
+	total_count = count1 + count2 + count3;
+
+	/* FIXME: handle per-counter overflow */
+	if (total_count < dev_priv->ips.last_count1) {
+		diff = ~0UL - dev_priv->ips.last_count1;
+		diff += total_count;
+	} else {
+		diff = total_count - dev_priv->ips.last_count1;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(cparams); i++) {
+		if (cparams[i].i == dev_priv->ips.c_m &&
+		    cparams[i].t == dev_priv->ips.r_t) {
+			m = cparams[i].m;
+			c = cparams[i].c;
+			break;
+		}
+	}
+
+	diff = div_u64(diff, diff1);
+	ret = ((m * diff) + c);
+	ret = div_u64(ret, 10);
+
+	dev_priv->ips.last_count1 = total_count;
+	dev_priv->ips.last_time1 = now;
+
+	dev_priv->ips.chipset_power = ret;
+
+	return ret;
+}
+
+unsigned long i915_chipset_val(struct drm_i915_private *dev_priv)
+{
+	unsigned long val;
+
+	if (INTEL_INFO(dev_priv)->gen != 5)
+		return 0;
+
+	intel_runtime_pm_get(dev_priv);
+	spin_lock_irq(&mchdev_lock);
+
+	val = __i915_chipset_val(dev_priv);
+
+	spin_unlock_irq(&mchdev_lock);
+	intel_runtime_pm_put(dev_priv);
+
+	return val;
+}
+
+unsigned long i915_mch_val(struct drm_i915_private *dev_priv)
+{
+	unsigned long m, x, b;
+	u32 tsfs;
+
+	tsfs = I915_READ(TSFS);
+
+	m = ((tsfs & TSFS_SLOPE_MASK) >> TSFS_SLOPE_SHIFT);
+	x = I915_READ8(TR1);
+
+	b = tsfs & TSFS_INTR_MASK;
+
+	return ((m * x) / 127) - b;
+}
+
+static int _pxvid_to_vd(u8 pxvid)
+{
+	if (pxvid == 0)
+		return 0;
+
+	if (pxvid >= 8 && pxvid < 31)
+		pxvid = 31;
+
+	return (pxvid + 2) * 125;
+}
+
+static u32 pvid_to_extvid(struct drm_i915_private *dev_priv, u8 pxvid)
+{
+	const int vd = _pxvid_to_vd(pxvid);
+	const int vm = vd - 1125;
+
+	if (INTEL_INFO(dev_priv)->is_mobile)
+		return vm > 0 ? vm : 0;
+
+	return vd;
+}
+
+static void __i915_update_gfx_val(struct drm_i915_private *dev_priv)
+{
+	u64 now, diff, diffms;
+	u32 count;
+
+	lockdep_assert_held(&mchdev_lock);
+
+	now = ktime_get_raw_ns();
+	diffms = now - dev_priv->ips.last_time2;
+	do_div(diffms, NSEC_PER_MSEC);
+
+	/* Don't divide by 0 */
+	if (!diffms)
+		return;
+
+	count = I915_READ(GFXEC);
+
+	if (count < dev_priv->ips.last_count2) {
+		diff = ~0UL - dev_priv->ips.last_count2;
+		diff += count;
+	} else {
+		diff = count - dev_priv->ips.last_count2;
+	}
+
+	dev_priv->ips.last_count2 = count;
+	dev_priv->ips.last_time2 = now;
+
+	/* More magic constants... */
+	diff = diff * 1181;
+	diff = div_u64(diff, diffms * 10);
+	dev_priv->ips.gfx_power = diff;
+}
+
+void i915_update_gfx_val(struct drm_i915_private *dev_priv)
+{
+	if (INTEL_INFO(dev_priv)->gen != 5)
+		return;
+
+	intel_runtime_pm_get(dev_priv);
+	spin_lock_irq(&mchdev_lock);
+
+	__i915_update_gfx_val(dev_priv);
+
+	spin_unlock_irq(&mchdev_lock);
+	intel_runtime_pm_put(dev_priv);
+}
+
+static unsigned long __i915_gfx_val(struct drm_i915_private *dev_priv)
+{
+	unsigned long t, corr, state1, corr2, state2;
+	u32 pxvid, ext_v;
+
+	lockdep_assert_held(&mchdev_lock);
+
+	pxvid = I915_READ(PXVFREQ(dev_priv->gt_pm.rps.cur_freq));
+	pxvid = (pxvid >> 24) & 0x7f;
+	ext_v = pvid_to_extvid(dev_priv, pxvid);
+
+	state1 = ext_v;
+
+	t = i915_mch_val(dev_priv);
+
+	/* Revel in the empirically derived constants */
+
+	/* Correction factor in 1/100000 units */
+	if (t > 80)
+		corr = ((t * 2349) + 135940);
+	else if (t >= 50)
+		corr = ((t * 964) + 29317);
+	else /* < 50 */
+		corr = ((t * 301) + 1004);
+
+	corr = corr * ((150142 * state1) / 10000 - 78642);
+	corr /= 100000;
+	corr2 = (corr * dev_priv->ips.corr);
+
+	state2 = (corr2 * state1) / 10000;
+	state2 /= 100; /* convert to mW */
+
+	__i915_update_gfx_val(dev_priv);
+
+	return dev_priv->ips.gfx_power + state2;
+}
+
+unsigned long i915_gfx_val(struct drm_i915_private *dev_priv)
+{
+	unsigned long val;
+
+	if (INTEL_INFO(dev_priv)->gen != 5)
+		return 0;
+
+	intel_runtime_pm_get(dev_priv);
+	spin_lock_irq(&mchdev_lock);
+
+	val = __i915_gfx_val(dev_priv);
+
+	spin_unlock_irq(&mchdev_lock);
+	intel_runtime_pm_put(dev_priv);
+
+	return val;
+}
+
+static struct drm_i915_private *i915_mch_dev;
+
+static struct drm_i915_private *mchdev_get(void)
+{
+	struct drm_i915_private *i915;
+
+	rcu_read_lock();
+	i915 = i915_mch_dev;
+	if (!kref_get_unless_zero(&i915->drm.ref))
+		i915 = NULL;
+	rcu_read_unlock();
+
+	return i915;
+}
+
+/**
+ * i915_read_mch_val - return value for IPS use
+ *
+ * Calculate and return a value for the IPS driver to use when deciding whether
+ * we have thermal and power headroom to increase CPU or GPU power budget.
+ */
+unsigned long i915_read_mch_val(void)
+{
+	struct drm_i915_private *i915;
+	unsigned long chipset_val, graphics_val;
+
+	i915 = mchdev_get();
+	if (!i915)
+		return 0;
+
+	intel_runtime_pm_get(i915);
+	spin_lock_irq(&mchdev_lock);
+	chipset_val = __i915_chipset_val(i915);
+	graphics_val = __i915_gfx_val(i915);
+	spin_unlock_irq(&mchdev_lock);
+	intel_runtime_pm_put(i915);
+
+	drm_dev_put(&i915->drm);
+	return chipset_val + graphics_val;
+}
+EXPORT_SYMBOL_GPL(i915_read_mch_val);
+
+/**
+ * i915_gpu_raise - raise GPU frequency limit
+ *
+ * Raise the limit; IPS indicates we have thermal headroom.
+ */
+bool i915_gpu_raise(void)
+{
+	struct drm_i915_private *i915;
+
+	i915 = mchdev_get();
+	if (!i915)
+		return false;
+
+	spin_lock_irq(&mchdev_lock);
+	if (i915->ips.max_delay > i915->ips.fmax)
+		i915->ips.max_delay--;
+	spin_unlock_irq(&mchdev_lock);
+
+	drm_dev_put(&i915->drm);
+	return true;
+}
+EXPORT_SYMBOL_GPL(i915_gpu_raise);
+
+/**
+ * i915_gpu_lower - lower GPU frequency limit
+ *
+ * IPS indicates we're close to a thermal limit, so throttle back the GPU
+ * frequency maximum.
+ */
+bool i915_gpu_lower(void)
+{
+	struct drm_i915_private *i915;
+
+	i915 = mchdev_get();
+	if (!i915)
+		return false;
+
+	spin_lock_irq(&mchdev_lock);
+	if (i915->ips.max_delay < i915->ips.min_delay)
+		i915->ips.max_delay++;
+	spin_unlock_irq(&mchdev_lock);
+
+	drm_dev_put(&i915->drm);
+	return true;
+}
+EXPORT_SYMBOL_GPL(i915_gpu_lower);
+
+/**
+ * i915_gpu_busy - indicate GPU business to IPS
+ *
+ * Tell the IPS driver whether or not the GPU is busy.
+ */
+bool i915_gpu_busy(void)
+{
+	struct drm_i915_private *i915;
+	bool ret;
+
+	i915 = mchdev_get();
+	if (!i915)
+		return false;
+
+	ret = i915->gt.awake;
+
+	drm_dev_put(&i915->drm);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(i915_gpu_busy);
+
+/**
+ * i915_gpu_turbo_disable - disable graphics turbo
+ *
+ * Disable graphics turbo by resetting the max frequency and setting the
+ * current frequency to the default.
+ */
+bool i915_gpu_turbo_disable(void)
+{
+	struct drm_i915_private *i915;
+	bool ret;
+
+	i915 = mchdev_get();
+	if (!i915)
+		return false;
+
+	spin_lock_irq(&mchdev_lock);
+	i915->ips.max_delay = i915->ips.fstart;
+	ret = ironlake_set_drps(i915, i915->ips.fstart);
+	spin_unlock_irq(&mchdev_lock);
+
+	drm_dev_put(&i915->drm);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(i915_gpu_turbo_disable);
+
+/**
+ * Tells the intel_ips driver that the i915 driver is now loaded, if
+ * IPS got loaded first.
+ *
+ * This awkward dance is so that neither module has to depend on the
+ * other in order for IPS to do the appropriate communication of
+ * GPU turbo limits to i915.
+ */
+static void
+ips_ping_for_i915_load(void)
+{
+	void (*link)(void);
+
+	link = symbol_get(ips_link_to_i915_driver);
+	if (link) {
+		link();
+		symbol_put(ips_link_to_i915_driver);
+	}
+}
+
+void intel_gpu_ips_init(struct drm_i915_private *dev_priv)
+{
+	/* We only register the i915 ips part with intel-ips once everything is
+	 * set up, to avoid intel-ips sneaking in and reading bogus values. */
+	smp_store_mb(i915_mch_dev, dev_priv);
+
+	ips_ping_for_i915_load();
+}
+
+void intel_gpu_ips_teardown(void)
+{
+	smp_store_mb(i915_mch_dev, NULL);
+}
+
+static void intel_init_emon(struct drm_i915_private *dev_priv)
+{
+	u32 lcfuse;
+	u8 pxw[16];
+	int i;
+
+	/* Disable to program */
+	I915_WRITE(ECR, 0);
+	POSTING_READ(ECR);
+
+	/* Program energy weights for various events */
+	I915_WRITE(SDEW, 0x15040d00);
+	I915_WRITE(CSIEW0, 0x007f0000);
+	I915_WRITE(CSIEW1, 0x1e220004);
+	I915_WRITE(CSIEW2, 0x04000004);
+
+	for (i = 0; i < 5; i++)
+		I915_WRITE(PEW(i), 0);
+	for (i = 0; i < 3; i++)
+		I915_WRITE(DEW(i), 0);
+
+	/* Program P-state weights to account for frequency power adjustment */
+	for (i = 0; i < 16; i++) {
+		u32 pxvidfreq = I915_READ(PXVFREQ(i));
+		unsigned long freq = intel_pxfreq(pxvidfreq);
+		unsigned long vid = (pxvidfreq & PXVFREQ_PX_MASK) >>
+			PXVFREQ_PX_SHIFT;
+		unsigned long val;
+
+		val = vid * vid;
+		val *= (freq / 1000);
+		val *= 255;
+		val /= (127*127*900);
+		if (val > 0xff)
+			DRM_ERROR("bad pxval: %ld\n", val);
+		pxw[i] = val;
+	}
+	/* Render standby states get 0 weight */
+	pxw[14] = 0;
+	pxw[15] = 0;
+
+	for (i = 0; i < 4; i++) {
+		u32 val = (pxw[i*4] << 24) | (pxw[(i*4)+1] << 16) |
+			(pxw[(i*4)+2] << 8) | (pxw[(i*4)+3]);
+		I915_WRITE(PXW(i), val);
+	}
+
+	/* Adjust magic regs to magic values (more experimental results) */
+	I915_WRITE(OGW0, 0);
+	I915_WRITE(OGW1, 0);
+	I915_WRITE(EG0, 0x00007f00);
+	I915_WRITE(EG1, 0x0000000e);
+	I915_WRITE(EG2, 0x000e0000);
+	I915_WRITE(EG3, 0x68000300);
+	I915_WRITE(EG4, 0x42000000);
+	I915_WRITE(EG5, 0x00140031);
+	I915_WRITE(EG6, 0);
+	I915_WRITE(EG7, 0);
+
+	for (i = 0; i < 8; i++)
+		I915_WRITE(PXWL(i), 0);
+
+	/* Enable PMON + select events */
+	I915_WRITE(ECR, 0x80000019);
+
+	lcfuse = I915_READ(LCFUSE02);
+
+	dev_priv->ips.corr = (lcfuse & LCFUSE_HIV_MASK);
+}
+
+void intel_init_gt_powersave(struct drm_i915_private *dev_priv)
+{
+	struct intel_rps *rps = &dev_priv->gt_pm.rps;
+
+	/*
+	 * RPM depends on RC6 to save restore the GT HW context, so make RC6 a
+	 * requirement.
+	 */
+	if (!sanitize_rc6(dev_priv)) {
+		DRM_INFO("RC6 disabled, disabling runtime PM support\n");
+		intel_runtime_pm_get(dev_priv);
+	}
+
+	mutex_lock(&dev_priv->pcu_lock);
+
+	/* Initialize RPS limits (for userspace) */
+	if (IS_CHERRYVIEW(dev_priv))
+		cherryview_init_gt_powersave(dev_priv);
+	else if (IS_VALLEYVIEW(dev_priv))
+		valleyview_init_gt_powersave(dev_priv);
+	else if (INTEL_GEN(dev_priv) >= 6)
+		gen6_init_rps_frequencies(dev_priv);
+
+	/* Derive initial user preferences/limits from the hardware limits */
+	rps->idle_freq = rps->min_freq;
+	rps->cur_freq = rps->idle_freq;
+
+	rps->max_freq_softlimit = rps->max_freq;
+	rps->min_freq_softlimit = rps->min_freq;
+
+	if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
+		rps->min_freq_softlimit =
+			max_t(int,
+			      rps->efficient_freq,
+			      intel_freq_opcode(dev_priv, 450));
+
+	/* After setting max-softlimit, find the overclock max freq */
+	if (IS_GEN6(dev_priv) ||
+	    IS_IVYBRIDGE(dev_priv) || IS_HASWELL(dev_priv)) {
+		u32 params = 0;
+
+		sandybridge_pcode_read(dev_priv, GEN6_READ_OC_PARAMS, &params);
+		if (params & BIT(31)) { /* OC supported */
+			DRM_DEBUG_DRIVER("Overclocking supported, max: %dMHz, overclock: %dMHz\n",
+					 (rps->max_freq & 0xff) * 50,
+					 (params & 0xff) * 50);
+			rps->max_freq = params & 0xff;
+		}
+	}
+
+	/* Finally allow us to boost to max by default */
+	rps->boost_freq = rps->max_freq;
+
+	mutex_unlock(&dev_priv->pcu_lock);
+}
+
+void intel_cleanup_gt_powersave(struct drm_i915_private *dev_priv)
+{
+	if (IS_VALLEYVIEW(dev_priv))
+		valleyview_cleanup_gt_powersave(dev_priv);
+
+	if (!HAS_RC6(dev_priv))
+		intel_runtime_pm_put(dev_priv);
+}
+
+/**
+ * intel_suspend_gt_powersave - suspend PM work and helper threads
+ * @dev_priv: i915 device
+ *
+ * We don't want to disable RC6 or other features here, we just want
+ * to make sure any work we've queued has finished and won't bother
+ * us while we're suspended.
+ */
+void intel_suspend_gt_powersave(struct drm_i915_private *dev_priv)
+{
+	if (INTEL_GEN(dev_priv) < 6)
+		return;
+
+	/* gen6_rps_idle() will be called later to disable interrupts */
+}
+
+void intel_sanitize_gt_powersave(struct drm_i915_private *dev_priv)
+{
+	dev_priv->gt_pm.rps.enabled = true; /* force RPS disabling */
+	dev_priv->gt_pm.rc6.enabled = true; /* force RC6 disabling */
+	intel_disable_gt_powersave(dev_priv);
+
+	gen6_reset_rps_interrupts(dev_priv);
+}
+
+static inline void intel_disable_llc_pstate(struct drm_i915_private *i915)
+{
+	lockdep_assert_held(&i915->pcu_lock);
+
+	if (!i915->gt_pm.llc_pstate.enabled)
+		return;
+
+	/* Currently there is no HW configuration to be done to disable. */
+
+	i915->gt_pm.llc_pstate.enabled = false;
+}
+
+static void intel_disable_rc6(struct drm_i915_private *dev_priv)
+{
+	lockdep_assert_held(&dev_priv->pcu_lock);
+
+	if (!dev_priv->gt_pm.rc6.enabled)
+		return;
+
+	if (INTEL_GEN(dev_priv) >= 9)
+		gen9_disable_rc6(dev_priv);
+	else if (IS_CHERRYVIEW(dev_priv))
+		cherryview_disable_rc6(dev_priv);
+	else if (IS_VALLEYVIEW(dev_priv))
+		valleyview_disable_rc6(dev_priv);
+	else if (INTEL_GEN(dev_priv) >= 6)
+		gen6_disable_rc6(dev_priv);
+
+	dev_priv->gt_pm.rc6.enabled = false;
+}
+
+static void intel_disable_rps(struct drm_i915_private *dev_priv)
+{
+	lockdep_assert_held(&dev_priv->pcu_lock);
+
+	if (!dev_priv->gt_pm.rps.enabled)
+		return;
+
+	if (INTEL_GEN(dev_priv) >= 9)
+		gen9_disable_rps(dev_priv);
+	else if (IS_CHERRYVIEW(dev_priv))
+		cherryview_disable_rps(dev_priv);
+	else if (IS_VALLEYVIEW(dev_priv))
+		valleyview_disable_rps(dev_priv);
+	else if (INTEL_GEN(dev_priv) >= 6)
+		gen6_disable_rps(dev_priv);
+	else if (IS_IRONLAKE_M(dev_priv))
+		ironlake_disable_drps(dev_priv);
+
+	dev_priv->gt_pm.rps.enabled = false;
+}
+
+void intel_disable_gt_powersave(struct drm_i915_private *dev_priv)
+{
+	mutex_lock(&dev_priv->pcu_lock);
+
+	intel_disable_rc6(dev_priv);
+	intel_disable_rps(dev_priv);
+	if (HAS_LLC(dev_priv))
+		intel_disable_llc_pstate(dev_priv);
+
+	mutex_unlock(&dev_priv->pcu_lock);
+}
+
+static inline void intel_enable_llc_pstate(struct drm_i915_private *i915)
+{
+	lockdep_assert_held(&i915->pcu_lock);
+
+	if (i915->gt_pm.llc_pstate.enabled)
+		return;
+
+	gen6_update_ring_freq(i915);
+
+	i915->gt_pm.llc_pstate.enabled = true;
+}
+
+static void intel_enable_rc6(struct drm_i915_private *dev_priv)
+{
+	lockdep_assert_held(&dev_priv->pcu_lock);
+
+	if (dev_priv->gt_pm.rc6.enabled)
+		return;
+
+	if (IS_CHERRYVIEW(dev_priv))
+		cherryview_enable_rc6(dev_priv);
+	else if (IS_VALLEYVIEW(dev_priv))
+		valleyview_enable_rc6(dev_priv);
+	else if (INTEL_GEN(dev_priv) >= 9)
+		gen9_enable_rc6(dev_priv);
+	else if (IS_BROADWELL(dev_priv))
+		gen8_enable_rc6(dev_priv);
+	else if (INTEL_GEN(dev_priv) >= 6)
+		gen6_enable_rc6(dev_priv);
+
+	dev_priv->gt_pm.rc6.enabled = true;
+}
+
+static void intel_enable_rps(struct drm_i915_private *dev_priv)
+{
+	struct intel_rps *rps = &dev_priv->gt_pm.rps;
+
+	lockdep_assert_held(&dev_priv->pcu_lock);
+
+	if (rps->enabled)
+		return;
+
+	if (IS_CHERRYVIEW(dev_priv)) {
+		cherryview_enable_rps(dev_priv);
+	} else if (IS_VALLEYVIEW(dev_priv)) {
+		valleyview_enable_rps(dev_priv);
+	} else if (INTEL_GEN(dev_priv) >= 9) {
+		gen9_enable_rps(dev_priv);
+	} else if (IS_BROADWELL(dev_priv)) {
+		gen8_enable_rps(dev_priv);
+	} else if (INTEL_GEN(dev_priv) >= 6) {
+		gen6_enable_rps(dev_priv);
+	} else if (IS_IRONLAKE_M(dev_priv)) {
+		ironlake_enable_drps(dev_priv);
+		intel_init_emon(dev_priv);
+	}
+
+	WARN_ON(rps->max_freq < rps->min_freq);
+	WARN_ON(rps->idle_freq > rps->max_freq);
+
+	WARN_ON(rps->efficient_freq < rps->min_freq);
+	WARN_ON(rps->efficient_freq > rps->max_freq);
+
+	rps->enabled = true;
+}
+
+void intel_enable_gt_powersave(struct drm_i915_private *dev_priv)
+{
+	/* Powersaving is controlled by the host when inside a VM */
+	if (intel_vgpu_active(dev_priv))
+		return;
+
+	mutex_lock(&dev_priv->pcu_lock);
+
+	if (HAS_RC6(dev_priv))
+		intel_enable_rc6(dev_priv);
+	intel_enable_rps(dev_priv);
+	if (HAS_LLC(dev_priv))
+		intel_enable_llc_pstate(dev_priv);
+
+	mutex_unlock(&dev_priv->pcu_lock);
+}
+
+static int byt_gpu_freq(struct drm_i915_private *dev_priv, int val)
+{
+	struct intel_rps *rps = &dev_priv->gt_pm.rps;
+
+	/*
+	 * N = val - 0xb7
+	 * Slow = Fast = GPLL ref * N
+	 */
+	return DIV_ROUND_CLOSEST(rps->gpll_ref_freq * (val - 0xb7), 1000);
+}
+
+static int byt_freq_opcode(struct drm_i915_private *dev_priv, int val)
+{
+	struct intel_rps *rps = &dev_priv->gt_pm.rps;
+
+	return DIV_ROUND_CLOSEST(1000 * val, rps->gpll_ref_freq) + 0xb7;
+}
+
+static int chv_gpu_freq(struct drm_i915_private *dev_priv, int val)
+{
+	struct intel_rps *rps = &dev_priv->gt_pm.rps;
+
+	/*
+	 * N = val / 2
+	 * CU (slow) = CU2x (fast) / 2 = GPLL ref * N / 2
+	 */
+	return DIV_ROUND_CLOSEST(rps->gpll_ref_freq * val, 2 * 2 * 1000);
+}
+
+static int chv_freq_opcode(struct drm_i915_private *dev_priv, int val)
+{
+	struct intel_rps *rps = &dev_priv->gt_pm.rps;
+
+	/* CHV needs even values */
+	return DIV_ROUND_CLOSEST(2 * 1000 * val, rps->gpll_ref_freq) * 2;
+}
+
+int intel_gpu_freq(struct drm_i915_private *dev_priv, int val)
+{
+	if (INTEL_GEN(dev_priv) >= 9)
+		return DIV_ROUND_CLOSEST(val * GT_FREQUENCY_MULTIPLIER,
+					 GEN9_FREQ_SCALER);
+	else if (IS_CHERRYVIEW(dev_priv))
+		return chv_gpu_freq(dev_priv, val);
+	else if (IS_VALLEYVIEW(dev_priv))
+		return byt_gpu_freq(dev_priv, val);
+	else
+		return val * GT_FREQUENCY_MULTIPLIER;
+}
+
+int intel_freq_opcode(struct drm_i915_private *dev_priv, int val)
+{
+	if (INTEL_GEN(dev_priv) >= 9)
+		return DIV_ROUND_CLOSEST(val * GEN9_FREQ_SCALER,
+					 GT_FREQUENCY_MULTIPLIER);
+	else if (IS_CHERRYVIEW(dev_priv))
+		return chv_freq_opcode(dev_priv, val);
+	else if (IS_VALLEYVIEW(dev_priv))
+		return byt_freq_opcode(dev_priv, val);
+	else
+		return DIV_ROUND_CLOSEST(val, GT_FREQUENCY_MULTIPLIER);
+}
diff --git a/drivers/gpu/drm/i915/intel_gt_pm.h b/drivers/gpu/drm/i915/intel_gt_pm.h
new file mode 100644
index 000000000000..ba31409e3663
--- /dev/null
+++ b/drivers/gpu/drm/i915/intel_gt_pm.h
@@ -0,0 +1,46 @@
+/*
+ * Copyright © 2012 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#ifndef __INTEL_GT_PM_H__
+#define __INTEL_GT_PM_H__
+
+void intel_gpu_ips_init(struct drm_i915_private *dev_priv);
+void intel_gpu_ips_teardown(void);
+
+void intel_init_gt_powersave(struct drm_i915_private *dev_priv);
+void intel_cleanup_gt_powersave(struct drm_i915_private *dev_priv);
+void intel_sanitize_gt_powersave(struct drm_i915_private *dev_priv);
+void intel_enable_gt_powersave(struct drm_i915_private *dev_priv);
+void intel_disable_gt_powersave(struct drm_i915_private *dev_priv);
+void intel_suspend_gt_powersave(struct drm_i915_private *dev_priv);
+
+void gen6_rps_busy(struct drm_i915_private *dev_priv);
+void gen6_rps_reset_ei(struct drm_i915_private *dev_priv);
+void gen6_rps_idle(struct drm_i915_private *dev_priv);
+void gen6_rps_boost(struct drm_i915_gem_request *rq,
+		    struct intel_rps_client *rps);
+
+int intel_gpu_freq(struct drm_i915_private *dev_priv, int val);
+int intel_freq_opcode(struct drm_i915_private *dev_priv, int val);
+
+#endif /* __INTEL_GT_PM_H__ */
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 85ff19c5beb6..f047b733b19f 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -29,30 +29,9 @@
 #include <drm/drm_plane_helper.h>
 #include "i915_drv.h"
 #include "intel_drv.h"
-#include "../../../platform/x86/intel_ips.h"
 #include <linux/module.h>
 #include <drm/drm_atomic_helper.h>
 
-/**
- * DOC: RC6
- *
- * RC6 is a special power stage which allows the GPU to enter an very
- * low-voltage mode when idle, using down to 0V while at this stage.  This
- * stage is entered automatically when the GPU is idle when RC6 support is
- * enabled, and as soon as new workload arises GPU wakes up automatically as well.
- *
- * There are different RC6 modes available in Intel GPU, which differentiate
- * among each other with the latency required to enter and leave RC6 and
- * voltage consumed by the GPU in different states.
- *
- * The combination of the following flags define which states GPU is allowed
- * to enter, while RC6 is the normal RC6 state, RC6p is the deep RC6, and
- * RC6pp is deepest RC6. Their support by hardware varies according to the
- * GPU, BIOS, chipset and platform. RC6 is usually the safest one and the one
- * which brings the most power savings; deeper states save more power, but
- * require higher latency to switch to and wake up.
- */
-
 static void gen9_init_clock_gating(struct drm_i915_private *dev_priv)
 {
 	if (HAS_LLC(dev_priv)) {
@@ -5887,2490 +5866,269 @@ void intel_init_ipc(struct drm_i915_private *dev_priv)
 	intel_enable_ipc(dev_priv);
 }
 
-/*
- * Lock protecting IPS related data structures
- */
-DEFINE_SPINLOCK(mchdev_lock);
+static void ibx_init_clock_gating(struct drm_i915_private *dev_priv)
+{
+	/*
+	 * On Ibex Peak and Cougar Point, we need to disable clock
+	 * gating for the panel power sequencer or it will fail to
+	 * start up when no ports are active.
+	 */
+	I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE);
+}
 
-bool ironlake_set_drps(struct drm_i915_private *dev_priv, u8 val)
+static void g4x_disable_trickle_feed(struct drm_i915_private *dev_priv)
 {
-	u16 rgvswctl;
+	enum pipe pipe;
 
-	lockdep_assert_held(&mchdev_lock);
+	for_each_pipe(dev_priv, pipe) {
+		I915_WRITE(DSPCNTR(pipe),
+			   I915_READ(DSPCNTR(pipe)) |
+			   DISPPLANE_TRICKLE_FEED_DISABLE);
 
-	rgvswctl = I915_READ16(MEMSWCTL);
-	if (rgvswctl & MEMCTL_CMD_STS) {
-		DRM_DEBUG("gpu busy, RCS change rejected\n");
-		return false; /* still busy with another command */
+		I915_WRITE(DSPSURF(pipe), I915_READ(DSPSURF(pipe)));
+		POSTING_READ(DSPSURF(pipe));
 	}
-
-	rgvswctl = (MEMCTL_CMD_CHFREQ << MEMCTL_CMD_SHIFT) |
-		(val << MEMCTL_FREQ_SHIFT) | MEMCTL_SFCAVM;
-	I915_WRITE16(MEMSWCTL, rgvswctl);
-	POSTING_READ16(MEMSWCTL);
-
-	rgvswctl |= MEMCTL_CMD_STS;
-	I915_WRITE16(MEMSWCTL, rgvswctl);
-
-	return true;
 }
 
-static void ironlake_enable_drps(struct drm_i915_private *dev_priv)
+static void ilk_init_clock_gating(struct drm_i915_private *dev_priv)
 {
-	u32 rgvmodectl;
-	u8 fmax, fmin, fstart, vstart;
-
-	spin_lock_irq(&mchdev_lock);
-
-	rgvmodectl = I915_READ(MEMMODECTL);
-
-	/* Enable temp reporting */
-	I915_WRITE16(PMMISC, I915_READ(PMMISC) | MCPPCE_EN);
-	I915_WRITE16(TSC1, I915_READ(TSC1) | TSE);
-
-	/* 100ms RC evaluation intervals */
-	I915_WRITE(RCUPEI, 100000);
-	I915_WRITE(RCDNEI, 100000);
-
-	/* Set max/min thresholds to 90ms and 80ms respectively */
-	I915_WRITE(RCBMAXAVG, 90000);
-	I915_WRITE(RCBMINAVG, 80000);
-
-	I915_WRITE(MEMIHYST, 1);
-
-	/* Set up min, max, and cur for interrupt handling */
-	fmax = (rgvmodectl & MEMMODE_FMAX_MASK) >> MEMMODE_FMAX_SHIFT;
-	fmin = (rgvmodectl & MEMMODE_FMIN_MASK);
-	fstart = (rgvmodectl & MEMMODE_FSTART_MASK) >>
-		MEMMODE_FSTART_SHIFT;
-
-	vstart = (I915_READ(PXVFREQ(fstart)) & PXVFREQ_PX_MASK) >>
-		PXVFREQ_PX_SHIFT;
-
-	dev_priv->ips.fmax = fmax; /* IPS callback will increase this */
-	dev_priv->ips.fstart = fstart;
+	uint32_t dspclk_gate = ILK_VRHUNIT_CLOCK_GATE_DISABLE;
 
-	dev_priv->ips.max_delay = fstart;
-	dev_priv->ips.min_delay = fmin;
-	dev_priv->ips.cur_delay = fstart;
+	/*
+	 * Required for FBC
+	 * WaFbcDisableDpfcClockGating:ilk
+	 */
+	dspclk_gate |= ILK_DPFCRUNIT_CLOCK_GATE_DISABLE |
+		   ILK_DPFCUNIT_CLOCK_GATE_DISABLE |
+		   ILK_DPFDUNIT_CLOCK_GATE_ENABLE;
 
-	DRM_DEBUG_DRIVER("fmax: %d, fmin: %d, fstart: %d\n",
-			 fmax, fmin, fstart);
+	I915_WRITE(PCH_3DCGDIS0,
+		   MARIUNIT_CLOCK_GATE_DISABLE |
+		   SVSMUNIT_CLOCK_GATE_DISABLE);
+	I915_WRITE(PCH_3DCGDIS1,
+		   VFMUNIT_CLOCK_GATE_DISABLE);
 
-	I915_WRITE(MEMINTREN, MEMINT_CX_SUPR_EN | MEMINT_EVAL_CHG_EN);
+	/*
+	 * According to the spec the following bits should be set in
+	 * order to enable memory self-refresh
+	 * The bit 22/21 of 0x42004
+	 * The bit 5 of 0x42020
+	 * The bit 15 of 0x45000
+	 */
+	I915_WRITE(ILK_DISPLAY_CHICKEN2,
+		   (I915_READ(ILK_DISPLAY_CHICKEN2) |
+		    ILK_DPARB_GATE | ILK_VSDPFD_FULL));
+	dspclk_gate |= ILK_DPARBUNIT_CLOCK_GATE_ENABLE;
+	I915_WRITE(DISP_ARB_CTL,
+		   (I915_READ(DISP_ARB_CTL) |
+		    DISP_FBC_WM_DIS));
 
 	/*
-	 * Interrupts will be enabled in ironlake_irq_postinstall
+	 * Based on the document from hardware guys the following bits
+	 * should be set unconditionally in order to enable FBC.
+	 * The bit 22 of 0x42000
+	 * The bit 22 of 0x42004
+	 * The bit 7,8,9 of 0x42020.
 	 */
+	if (IS_IRONLAKE_M(dev_priv)) {
+		/* WaFbcAsynchFlipDisableFbcQueue:ilk */
+		I915_WRITE(ILK_DISPLAY_CHICKEN1,
+			   I915_READ(ILK_DISPLAY_CHICKEN1) |
+			   ILK_FBCQ_DIS);
+		I915_WRITE(ILK_DISPLAY_CHICKEN2,
+			   I915_READ(ILK_DISPLAY_CHICKEN2) |
+			   ILK_DPARB_GATE);
+	}
 
-	I915_WRITE(VIDSTART, vstart);
-	POSTING_READ(VIDSTART);
+	I915_WRITE(ILK_DSPCLK_GATE_D, dspclk_gate);
 
-	rgvmodectl |= MEMMODE_SWMODE_EN;
-	I915_WRITE(MEMMODECTL, rgvmodectl);
+	I915_WRITE(ILK_DISPLAY_CHICKEN2,
+		   I915_READ(ILK_DISPLAY_CHICKEN2) |
+		   ILK_ELPIN_409_SELECT);
+	I915_WRITE(_3D_CHICKEN2,
+		   _3D_CHICKEN2_WM_READ_PIPELINED << 16 |
+		   _3D_CHICKEN2_WM_READ_PIPELINED);
 
-	if (wait_for_atomic((I915_READ(MEMSWCTL) & MEMCTL_CMD_STS) == 0, 10))
-		DRM_ERROR("stuck trying to change perf mode\n");
-	mdelay(1);
+	/* WaDisableRenderCachePipelinedFlush:ilk */
+	I915_WRITE(CACHE_MODE_0,
+		   _MASKED_BIT_ENABLE(CM0_PIPELINED_RENDER_FLUSH_DISABLE));
 
-	ironlake_set_drps(dev_priv, fstart);
+	/* WaDisable_RenderCache_OperationalFlush:ilk */
+	I915_WRITE(CACHE_MODE_0, _MASKED_BIT_DISABLE(RC_OP_FLUSH_ENABLE));
 
-	dev_priv->ips.last_count1 = I915_READ(DMIEC) +
-		I915_READ(DDREC) + I915_READ(CSIEC);
-	dev_priv->ips.last_time1 = jiffies_to_msecs(jiffies);
-	dev_priv->ips.last_count2 = I915_READ(GFXEC);
-	dev_priv->ips.last_time2 = ktime_get_raw_ns();
+	g4x_disable_trickle_feed(dev_priv);
 
-	spin_unlock_irq(&mchdev_lock);
+	ibx_init_clock_gating(dev_priv);
 }
 
-static void ironlake_disable_drps(struct drm_i915_private *dev_priv)
+static void cpt_init_clock_gating(struct drm_i915_private *dev_priv)
 {
-	u16 rgvswctl;
-
-	spin_lock_irq(&mchdev_lock);
-
-	rgvswctl = I915_READ16(MEMSWCTL);
-
-	/* Ack interrupts, disable EFC interrupt */
-	I915_WRITE(MEMINTREN, I915_READ(MEMINTREN) & ~MEMINT_EVAL_CHG_EN);
-	I915_WRITE(MEMINTRSTS, MEMINT_EVAL_CHG);
-	I915_WRITE(DEIER, I915_READ(DEIER) & ~DE_PCU_EVENT);
-	I915_WRITE(DEIIR, DE_PCU_EVENT);
-	I915_WRITE(DEIMR, I915_READ(DEIMR) | DE_PCU_EVENT);
-
-	/* Go back to the starting frequency */
-	ironlake_set_drps(dev_priv, dev_priv->ips.fstart);
-	mdelay(1);
-	rgvswctl |= MEMCTL_CMD_STS;
-	I915_WRITE(MEMSWCTL, rgvswctl);
-	mdelay(1);
+	int pipe;
+	uint32_t val;
 
-	spin_unlock_irq(&mchdev_lock);
+	/*
+	 * On Ibex Peak and Cougar Point, we need to disable clock
+	 * gating for the panel power sequencer or it will fail to
+	 * start up when no ports are active.
+	 */
+	I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE |
+		   PCH_DPLUNIT_CLOCK_GATE_DISABLE |
+		   PCH_CPUNIT_CLOCK_GATE_DISABLE);
+	I915_WRITE(SOUTH_CHICKEN2, I915_READ(SOUTH_CHICKEN2) |
+		   DPLS_EDP_PPS_FIX_DIS);
+	/* The below fixes the weird display corruption, a few pixels shifted
+	 * downward, on (only) LVDS of some HP laptops with IVY.
+	 */
+	for_each_pipe(dev_priv, pipe) {
+		val = I915_READ(TRANS_CHICKEN2(pipe));
+		val |= TRANS_CHICKEN2_TIMING_OVERRIDE;
+		val &= ~TRANS_CHICKEN2_FDI_POLARITY_REVERSED;
+		if (dev_priv->vbt.fdi_rx_polarity_inverted)
+			val |= TRANS_CHICKEN2_FDI_POLARITY_REVERSED;
+		val &= ~TRANS_CHICKEN2_FRAME_START_DELAY_MASK;
+		val &= ~TRANS_CHICKEN2_DISABLE_DEEP_COLOR_COUNTER;
+		val &= ~TRANS_CHICKEN2_DISABLE_DEEP_COLOR_MODESWITCH;
+		I915_WRITE(TRANS_CHICKEN2(pipe), val);
+	}
+	/* WADP0ClockGatingDisable */
+	for_each_pipe(dev_priv, pipe) {
+		I915_WRITE(TRANS_CHICKEN1(pipe),
+			   TRANS_CHICKEN1_DP0UNIT_GC_DISABLE);
+	}
 }
 
-/* There's a funny hw issue where the hw returns all 0 when reading from
- * GEN6_RP_INTERRUPT_LIMITS. Hence we always need to compute the desired value
- * ourselves, instead of doing a rmw cycle (which might result in us clearing
- * all limits and the gpu stuck at whatever frequency it is at atm).
- */
-static u32 intel_rps_limits(struct drm_i915_private *dev_priv, u8 val)
+static void gen6_check_mch_setup(struct drm_i915_private *dev_priv)
 {
-	struct intel_rps *rps = &dev_priv->gt_pm.rps;
-	u32 limits;
-
-	/* Only set the down limit when we've reached the lowest level to avoid
-	 * getting more interrupts, otherwise leave this clear. This prevents a
-	 * race in the hw when coming out of rc6: There's a tiny window where
-	 * the hw runs at the minimal clock before selecting the desired
-	 * frequency, if the down threshold expires in that window we will not
-	 * receive a down interrupt. */
-	if (INTEL_GEN(dev_priv) >= 9) {
-		limits = (rps->max_freq_softlimit) << 23;
-		if (val <= rps->min_freq_softlimit)
-			limits |= (rps->min_freq_softlimit) << 14;
-	} else {
-		limits = rps->max_freq_softlimit << 24;
-		if (val <= rps->min_freq_softlimit)
-			limits |= rps->min_freq_softlimit << 16;
-	}
+	uint32_t tmp;
 
-	return limits;
+	tmp = I915_READ(MCH_SSKPD);
+	if ((tmp & MCH_SSKPD_WM0_MASK) != MCH_SSKPD_WM0_VAL)
+		DRM_DEBUG_KMS("Wrong MCH_SSKPD value: 0x%08x This can cause underruns.\n",
+			      tmp);
 }
 
-static void gen6_set_rps_thresholds(struct drm_i915_private *dev_priv, u8 val)
+static void gen6_init_clock_gating(struct drm_i915_private *dev_priv)
 {
-	struct intel_rps *rps = &dev_priv->gt_pm.rps;
-	int new_power;
-	u32 threshold_up = 0, threshold_down = 0; /* in % */
-	u32 ei_up = 0, ei_down = 0;
+	uint32_t dspclk_gate = ILK_VRHUNIT_CLOCK_GATE_DISABLE;
 
-	new_power = rps->power;
-	switch (rps->power) {
-	case LOW_POWER:
-		if (val > rps->efficient_freq + 1 &&
-		    val > rps->cur_freq)
-			new_power = BETWEEN;
-		break;
+	I915_WRITE(ILK_DSPCLK_GATE_D, dspclk_gate);
 
-	case BETWEEN:
-		if (val <= rps->efficient_freq &&
-		    val < rps->cur_freq)
-			new_power = LOW_POWER;
-		else if (val >= rps->rp0_freq &&
-			 val > rps->cur_freq)
-			new_power = HIGH_POWER;
-		break;
+	I915_WRITE(ILK_DISPLAY_CHICKEN2,
+		   I915_READ(ILK_DISPLAY_CHICKEN2) |
+		   ILK_ELPIN_409_SELECT);
 
-	case HIGH_POWER:
-		if (val < (rps->rp1_freq + rps->rp0_freq) >> 1 &&
-		    val < rps->cur_freq)
-			new_power = BETWEEN;
-		break;
-	}
-	/* Max/min bins are special */
-	if (val <= rps->min_freq_softlimit)
-		new_power = LOW_POWER;
-	if (val >= rps->max_freq_softlimit)
-		new_power = HIGH_POWER;
-	if (new_power == rps->power)
-		return;
+	/* WaDisableHiZPlanesWhenMSAAEnabled:snb */
+	I915_WRITE(_3D_CHICKEN,
+		   _MASKED_BIT_ENABLE(_3D_CHICKEN_HIZ_PLANE_DISABLE_MSAA_4X_SNB));
 
-	/* Note the units here are not exactly 1us, but 1280ns. */
-	switch (new_power) {
-	case LOW_POWER:
-		/* Upclock if more than 95% busy over 16ms */
-		ei_up = 16000;
-		threshold_up = 95;
+	/* WaDisable_RenderCache_OperationalFlush:snb */
+	I915_WRITE(CACHE_MODE_0, _MASKED_BIT_DISABLE(RC_OP_FLUSH_ENABLE));
 
-		/* Downclock if less than 85% busy over 32ms */
-		ei_down = 32000;
-		threshold_down = 85;
-		break;
+	/*
+	 * BSpec recoomends 8x4 when MSAA is used,
+	 * however in practice 16x4 seems fastest.
+	 *
+	 * Note that PS/WM thread counts depend on the WIZ hashing
+	 * disable bit, which we don't touch here, but it's good
+	 * to keep in mind (see 3DSTATE_PS and 3DSTATE_WM).
+	 */
+	I915_WRITE(GEN6_GT_MODE,
+		   _MASKED_FIELD(GEN6_WIZ_HASHING_MASK, GEN6_WIZ_HASHING_16x4));
 
-	case BETWEEN:
-		/* Upclock if more than 90% busy over 13ms */
-		ei_up = 13000;
-		threshold_up = 90;
+	I915_WRITE(CACHE_MODE_0,
+		   _MASKED_BIT_DISABLE(CM0_STC_EVICT_DISABLE_LRA_SNB));
 
-		/* Downclock if less than 75% busy over 32ms */
-		ei_down = 32000;
-		threshold_down = 75;
-		break;
+	I915_WRITE(GEN6_UCGCTL1,
+		   I915_READ(GEN6_UCGCTL1) |
+		   GEN6_BLBUNIT_CLOCK_GATE_DISABLE |
+		   GEN6_CSUNIT_CLOCK_GATE_DISABLE);
 
-	case HIGH_POWER:
-		/* Upclock if more than 85% busy over 10ms */
-		ei_up = 10000;
-		threshold_up = 85;
+	/* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock
+	 * gating disable must be set.  Failure to set it results in
+	 * flickering pixels due to Z write ordering failures after
+	 * some amount of runtime in the Mesa "fire" demo, and Unigine
+	 * Sanctuary and Tropics, and apparently anything else with
+	 * alpha test or pixel discard.
+	 *
+	 * According to the spec, bit 11 (RCCUNIT) must also be set,
+	 * but we didn't debug actual testcases to find it out.
+	 *
+	 * WaDisableRCCUnitClockGating:snb
+	 * WaDisableRCPBUnitClockGating:snb
+	 */
+	I915_WRITE(GEN6_UCGCTL2,
+		   GEN6_RCPBUNIT_CLOCK_GATE_DISABLE |
+		   GEN6_RCCUNIT_CLOCK_GATE_DISABLE);
 
-		/* Downclock if less than 60% busy over 32ms */
-		ei_down = 32000;
-		threshold_down = 60;
-		break;
-	}
+	/* WaStripsFansDisableFastClipPerformanceFix:snb */
+	I915_WRITE(_3D_CHICKEN3,
+		   _MASKED_BIT_ENABLE(_3D_CHICKEN3_SF_DISABLE_FASTCLIP_CULL));
 
-	/* When byt can survive without system hang with dynamic
-	 * sw freq adjustments, this restriction can be lifted.
+	/*
+	 * Bspec says:
+	 * "This bit must be set if 3DSTATE_CLIP clip mode is set to normal and
+	 * 3DSTATE_SF number of SF output attributes is more than 16."
 	 */
-	if (IS_VALLEYVIEW(dev_priv))
-		goto skip_hw_write;
+	I915_WRITE(_3D_CHICKEN3,
+		   _MASKED_BIT_ENABLE(_3D_CHICKEN3_SF_DISABLE_PIPELINED_ATTR_FETCH));
 
-	I915_WRITE(GEN6_RP_UP_EI,
-		   GT_INTERVAL_FROM_US(dev_priv, ei_up));
-	I915_WRITE(GEN6_RP_UP_THRESHOLD,
-		   GT_INTERVAL_FROM_US(dev_priv,
-				       ei_up * threshold_up / 100));
+	/*
+	 * According to the spec the following bits should be
+	 * set in order to enable memory self-refresh and fbc:
+	 * The bit21 and bit22 of 0x42000
+	 * The bit21 and bit22 of 0x42004
+	 * The bit5 and bit7 of 0x42020
+	 * The bit14 of 0x70180
+	 * The bit14 of 0x71180
+	 *
+	 * WaFbcAsynchFlipDisableFbcQueue:snb
+	 */
+	I915_WRITE(ILK_DISPLAY_CHICKEN1,
+		   I915_READ(ILK_DISPLAY_CHICKEN1) |
+		   ILK_FBCQ_DIS | ILK_PABSTRETCH_DIS);
+	I915_WRITE(ILK_DISPLAY_CHICKEN2,
+		   I915_READ(ILK_DISPLAY_CHICKEN2) |
+		   ILK_DPARB_GATE | ILK_VSDPFD_FULL);
+	I915_WRITE(ILK_DSPCLK_GATE_D,
+		   I915_READ(ILK_DSPCLK_GATE_D) |
+		   ILK_DPARBUNIT_CLOCK_GATE_ENABLE  |
+		   ILK_DPFDUNIT_CLOCK_GATE_ENABLE);
 
-	I915_WRITE(GEN6_RP_DOWN_EI,
-		   GT_INTERVAL_FROM_US(dev_priv, ei_down));
-	I915_WRITE(GEN6_RP_DOWN_THRESHOLD,
-		   GT_INTERVAL_FROM_US(dev_priv,
-				       ei_down * threshold_down / 100));
+	g4x_disable_trickle_feed(dev_priv);
 
-	I915_WRITE(GEN6_RP_CONTROL,
-		   GEN6_RP_MEDIA_TURBO |
-		   GEN6_RP_MEDIA_HW_NORMAL_MODE |
-		   GEN6_RP_MEDIA_IS_GFX |
-		   GEN6_RP_ENABLE |
-		   GEN6_RP_UP_BUSY_AVG |
-		   GEN6_RP_DOWN_IDLE_AVG);
+	cpt_init_clock_gating(dev_priv);
 
-skip_hw_write:
-	rps->power = new_power;
-	rps->up_threshold = threshold_up;
-	rps->down_threshold = threshold_down;
-	rps->last_adj = 0;
+	gen6_check_mch_setup(dev_priv);
 }
 
-static u32 gen6_rps_pm_mask(struct drm_i915_private *dev_priv, u8 val)
+static void gen7_setup_fixed_func_scheduler(struct drm_i915_private *dev_priv)
 {
-	struct intel_rps *rps = &dev_priv->gt_pm.rps;
-	u32 mask = 0;
-
-	/* We use UP_EI_EXPIRED interupts for both up/down in manual mode */
-	if (val > rps->min_freq_softlimit)
-		mask |= GEN6_PM_RP_UP_EI_EXPIRED | GEN6_PM_RP_DOWN_THRESHOLD | GEN6_PM_RP_DOWN_TIMEOUT;
-	if (val < rps->max_freq_softlimit)
-		mask |= GEN6_PM_RP_UP_EI_EXPIRED | GEN6_PM_RP_UP_THRESHOLD;
+	uint32_t reg = I915_READ(GEN7_FF_THREAD_MODE);
 
-	mask &= dev_priv->pm_rps_events;
+	/*
+	 * WaVSThreadDispatchOverride:ivb,vlv
+	 *
+	 * This actually overrides the dispatch
+	 * mode for all thread types.
+	 */
+	reg &= ~GEN7_FF_SCHED_MASK;
+	reg |= GEN7_FF_TS_SCHED_HW;
+	reg |= GEN7_FF_VS_SCHED_HW;
+	reg |= GEN7_FF_DS_SCHED_HW;
 
-	return gen6_sanitize_rps_pm_mask(dev_priv, ~mask);
+	I915_WRITE(GEN7_FF_THREAD_MODE, reg);
 }
 
-/* gen6_set_rps is called to update the frequency request, but should also be
- * called when the range (min_delay and max_delay) is modified so that we can
- * update the GEN6_RP_INTERRUPT_LIMITS register accordingly. */
-static int gen6_set_rps(struct drm_i915_private *dev_priv, u8 val)
+static void lpt_init_clock_gating(struct drm_i915_private *dev_priv)
 {
-	struct intel_rps *rps = &dev_priv->gt_pm.rps;
-
-	/* min/max delay may still have been modified so be sure to
-	 * write the limits value.
-	 */
-	if (val != rps->cur_freq) {
-		gen6_set_rps_thresholds(dev_priv, val);
-
-		if (INTEL_GEN(dev_priv) >= 9)
-			I915_WRITE(GEN6_RPNSWREQ,
-				   GEN9_FREQUENCY(val));
-		else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
-			I915_WRITE(GEN6_RPNSWREQ,
-				   HSW_FREQUENCY(val));
-		else
-			I915_WRITE(GEN6_RPNSWREQ,
-				   GEN6_FREQUENCY(val) |
-				   GEN6_OFFSET(0) |
-				   GEN6_AGGRESSIVE_TURBO);
-	}
-
-	/* Make sure we continue to get interrupts
-	 * until we hit the minimum or maximum frequencies.
+	/*
+	 * TODO: this bit should only be enabled when really needed, then
+	 * disabled when not needed anymore in order to save power.
 	 */
-	I915_WRITE(GEN6_RP_INTERRUPT_LIMITS, intel_rps_limits(dev_priv, val));
-	I915_WRITE(GEN6_PMINTRMSK, gen6_rps_pm_mask(dev_priv, val));
-
-	rps->cur_freq = val;
-	trace_intel_gpu_freq_change(intel_gpu_freq(dev_priv, val));
-
-	return 0;
-}
-
-static int valleyview_set_rps(struct drm_i915_private *dev_priv, u8 val)
-{
-	int err;
-
-	if (WARN_ONCE(IS_CHERRYVIEW(dev_priv) && (val & 1),
-		      "Odd GPU freq value\n"))
-		val &= ~1;
-
-	I915_WRITE(GEN6_PMINTRMSK, gen6_rps_pm_mask(dev_priv, val));
-
-	if (val != dev_priv->gt_pm.rps.cur_freq) {
-		err = vlv_punit_write(dev_priv, PUNIT_REG_GPU_FREQ_REQ, val);
-		if (err)
-			return err;
-
-		gen6_set_rps_thresholds(dev_priv, val);
-	}
-
-	dev_priv->gt_pm.rps.cur_freq = val;
-	trace_intel_gpu_freq_change(intel_gpu_freq(dev_priv, val));
-
-	return 0;
-}
-
-/* vlv_set_rps_idle: Set the frequency to idle, if Gfx clocks are down
- *
- * * If Gfx is Idle, then
- * 1. Forcewake Media well.
- * 2. Request idle freq.
- * 3. Release Forcewake of Media well.
-*/
-static void vlv_set_rps_idle(struct drm_i915_private *dev_priv)
-{
-	struct intel_rps *rps = &dev_priv->gt_pm.rps;
-	u32 val = rps->idle_freq;
-	int err;
-
-	if (rps->cur_freq <= val)
-		return;
-
-	/* The punit delays the write of the frequency and voltage until it
-	 * determines the GPU is awake. During normal usage we don't want to
-	 * waste power changing the frequency if the GPU is sleeping (rc6).
-	 * However, the GPU and driver is now idle and we do not want to delay
-	 * switching to minimum voltage (reducing power whilst idle) as we do
-	 * not expect to be woken in the near future and so must flush the
-	 * change by waking the device.
-	 *
-	 * We choose to take the media powerwell (either would do to trick the
-	 * punit into committing the voltage change) as that takes a lot less
-	 * power than the render powerwell.
-	 */
-	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_MEDIA);
-	err = valleyview_set_rps(dev_priv, val);
-	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_MEDIA);
-
-	if (err)
-		DRM_ERROR("Failed to set RPS for idle\n");
-}
-
-void gen6_rps_busy(struct drm_i915_private *dev_priv)
-{
-	struct intel_rps *rps = &dev_priv->gt_pm.rps;
-
-	mutex_lock(&dev_priv->pcu_lock);
-	if (rps->enabled) {
-		u8 freq;
-
-		if (dev_priv->pm_rps_events & GEN6_PM_RP_UP_EI_EXPIRED)
-			gen6_rps_reset_ei(dev_priv);
-		I915_WRITE(GEN6_PMINTRMSK,
-			   gen6_rps_pm_mask(dev_priv, rps->cur_freq));
-
-		gen6_enable_rps_interrupts(dev_priv);
-
-		/* Use the user's desired frequency as a guide, but for better
-		 * performance, jump directly to RPe as our starting frequency.
-		 */
-		freq = max(rps->cur_freq,
-			   rps->efficient_freq);
-
-		if (intel_set_rps(dev_priv,
-				  clamp(freq,
-					rps->min_freq_softlimit,
-					rps->max_freq_softlimit)))
-			DRM_DEBUG_DRIVER("Failed to set idle frequency\n");
-	}
-	mutex_unlock(&dev_priv->pcu_lock);
-}
-
-void gen6_rps_idle(struct drm_i915_private *dev_priv)
-{
-	struct intel_rps *rps = &dev_priv->gt_pm.rps;
-
-	/* Flush our bottom-half so that it does not race with us
-	 * setting the idle frequency and so that it is bounded by
-	 * our rpm wakeref. And then disable the interrupts to stop any
-	 * futher RPS reclocking whilst we are asleep.
-	 */
-	gen6_disable_rps_interrupts(dev_priv);
-
-	mutex_lock(&dev_priv->pcu_lock);
-	if (rps->enabled) {
-		if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
-			vlv_set_rps_idle(dev_priv);
-		else
-			gen6_set_rps(dev_priv, rps->idle_freq);
-		rps->last_adj = 0;
-		I915_WRITE(GEN6_PMINTRMSK,
-			   gen6_sanitize_rps_pm_mask(dev_priv, ~0));
-	}
-	mutex_unlock(&dev_priv->pcu_lock);
-}
-
-void gen6_rps_boost(struct drm_i915_gem_request *rq,
-		    struct intel_rps_client *rps_client)
-{
-	struct intel_rps *rps = &rq->i915->gt_pm.rps;
-	unsigned long flags;
-	bool boost;
-
-	/* This is intentionally racy! We peek at the state here, then
-	 * validate inside the RPS worker.
-	 */
-	if (!rps->enabled)
-		return;
-
-	boost = false;
-	spin_lock_irqsave(&rq->lock, flags);
-	if (!rq->waitboost && !i915_gem_request_completed(rq)) {
-		atomic_inc(&rps->num_waiters);
-		rq->waitboost = true;
-		boost = true;
-	}
-	spin_unlock_irqrestore(&rq->lock, flags);
-	if (!boost)
-		return;
-
-	if (READ_ONCE(rps->cur_freq) < rps->boost_freq)
-		schedule_work(&rps->work);
-
-	atomic_inc(rps_client ? &rps_client->boosts : &rps->boosts);
-}
-
-int intel_set_rps(struct drm_i915_private *dev_priv, u8 val)
-{
-	struct intel_rps *rps = &dev_priv->gt_pm.rps;
-	int err;
-
-	lockdep_assert_held(&dev_priv->pcu_lock);
-	GEM_BUG_ON(val > rps->max_freq);
-	GEM_BUG_ON(val < rps->min_freq);
-
-	if (!rps->enabled) {
-		rps->cur_freq = val;
-		return 0;
-	}
-
-	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
-		err = valleyview_set_rps(dev_priv, val);
-	else
-		err = gen6_set_rps(dev_priv, val);
-
-	return err;
-}
-
-static void gen9_disable_rc6(struct drm_i915_private *dev_priv)
-{
-	I915_WRITE(GEN6_RC_CONTROL, 0);
-	I915_WRITE(GEN9_PG_ENABLE, 0);
-}
-
-static void gen9_disable_rps(struct drm_i915_private *dev_priv)
-{
-	I915_WRITE(GEN6_RP_CONTROL, 0);
-}
-
-static void gen6_disable_rc6(struct drm_i915_private *dev_priv)
-{
-	I915_WRITE(GEN6_RC_CONTROL, 0);
-}
-
-static void gen6_disable_rps(struct drm_i915_private *dev_priv)
-{
-	I915_WRITE(GEN6_RPNSWREQ, 1 << 31);
-	I915_WRITE(GEN6_RP_CONTROL, 0);
-}
-
-static void cherryview_disable_rc6(struct drm_i915_private *dev_priv)
-{
-	I915_WRITE(GEN6_RC_CONTROL, 0);
-}
-
-static void cherryview_disable_rps(struct drm_i915_private *dev_priv)
-{
-	I915_WRITE(GEN6_RP_CONTROL, 0);
-}
-
-static void valleyview_disable_rc6(struct drm_i915_private *dev_priv)
-{
-	/* We're doing forcewake before Disabling RC6,
-	 * This what the BIOS expects when going into suspend */
-	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
-
-	I915_WRITE(GEN6_RC_CONTROL, 0);
-
-	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
-}
-
-static void valleyview_disable_rps(struct drm_i915_private *dev_priv)
-{
-	I915_WRITE(GEN6_RP_CONTROL, 0);
-}
-
-static bool bxt_check_bios_rc6_setup(struct drm_i915_private *dev_priv)
-{
-	struct i915_ggtt *ggtt = &dev_priv->ggtt;
-	bool enable_rc6 = true;
-	unsigned long rc6_ctx_base;
-	u32 rc_ctl;
-	int rc_sw_target;
-
-	rc_ctl = I915_READ(GEN6_RC_CONTROL);
-	rc_sw_target = (I915_READ(GEN6_RC_STATE) & RC_SW_TARGET_STATE_MASK) >>
-		       RC_SW_TARGET_STATE_SHIFT;
-	DRM_DEBUG_DRIVER("BIOS enabled RC states: "
-			 "HW_CTRL %s HW_RC6 %s SW_TARGET_STATE %x\n",
-			 onoff(rc_ctl & GEN6_RC_CTL_HW_ENABLE),
-			 onoff(rc_ctl & GEN6_RC_CTL_RC6_ENABLE),
-			 rc_sw_target);
-
-	if (!(I915_READ(RC6_LOCATION) & RC6_CTX_IN_DRAM)) {
-		DRM_DEBUG_DRIVER("RC6 Base location not set properly.\n");
-		enable_rc6 = false;
-	}
-
-	/*
-	 * The exact context size is not known for BXT, so assume a page size
-	 * for this check.
-	 */
-	rc6_ctx_base = I915_READ(RC6_CTX_BASE) & RC6_CTX_BASE_MASK;
-	if (!((rc6_ctx_base >= ggtt->stolen_reserved_base) &&
-	      (rc6_ctx_base + PAGE_SIZE <= ggtt->stolen_reserved_base +
-					ggtt->stolen_reserved_size))) {
-		DRM_DEBUG_DRIVER("RC6 Base address not as expected.\n");
-		enable_rc6 = false;
-	}
-
-	if (!(((I915_READ(PWRCTX_MAXCNT_RCSUNIT) & IDLE_TIME_MASK) > 1) &&
-	      ((I915_READ(PWRCTX_MAXCNT_VCSUNIT0) & IDLE_TIME_MASK) > 1) &&
-	      ((I915_READ(PWRCTX_MAXCNT_BCSUNIT) & IDLE_TIME_MASK) > 1) &&
-	      ((I915_READ(PWRCTX_MAXCNT_VECSUNIT) & IDLE_TIME_MASK) > 1))) {
-		DRM_DEBUG_DRIVER("Engine Idle wait time not set properly.\n");
-		enable_rc6 = false;
-	}
-
-	if (!I915_READ(GEN8_PUSHBUS_CONTROL) ||
-	    !I915_READ(GEN8_PUSHBUS_ENABLE) ||
-	    !I915_READ(GEN8_PUSHBUS_SHIFT)) {
-		DRM_DEBUG_DRIVER("Pushbus not setup properly.\n");
-		enable_rc6 = false;
-	}
-
-	if (!I915_READ(GEN6_GFXPAUSE)) {
-		DRM_DEBUG_DRIVER("GFX pause not setup properly.\n");
-		enable_rc6 = false;
-	}
-
-	if (!I915_READ(GEN8_MISC_CTRL0)) {
-		DRM_DEBUG_DRIVER("GPM control not setup properly.\n");
-		enable_rc6 = false;
-	}
-
-	return enable_rc6;
-}
-
-static bool sanitize_rc6(struct drm_i915_private *i915)
-{
-	struct intel_device_info *info = mkwrite_device_info(i915);
-
-	/* Powersaving is controlled by the host when inside a VM */
-	if (intel_vgpu_active(i915))
-		info->has_rc6 = 0;
-
-	if (info->has_rc6 &&
-	    IS_GEN9_LP(i915) && !bxt_check_bios_rc6_setup(i915)) {
-		DRM_INFO("RC6 disabled by BIOS\n");
-		info->has_rc6 = 0;
-	}
-
-	/*
-	 * We assume that we do not have any deep rc6 levels if we don't have
-	 * have the previous rc6 level supported, i.e. we use HAS_RC6()
-	 * as the initial coarse check for rc6 in general, moving on to
-	 * progressively finer/deeper levels.
-	 */
-	if (!info->has_rc6 && info->has_rc6p)
-		info->has_rc6p = 0;
-
-	return info->has_rc6;
-}
-
-static void gen6_init_rps_frequencies(struct drm_i915_private *dev_priv)
-{
-	struct intel_rps *rps = &dev_priv->gt_pm.rps;
-
-	/* All of these values are in units of 50MHz */
-
-	/* static values from HW: RP0 > RP1 > RPn (min_freq) */
-	if (IS_GEN9_LP(dev_priv)) {
-		u32 rp_state_cap = I915_READ(BXT_RP_STATE_CAP);
-		rps->rp0_freq = (rp_state_cap >> 16) & 0xff;
-		rps->rp1_freq = (rp_state_cap >>  8) & 0xff;
-		rps->min_freq = (rp_state_cap >>  0) & 0xff;
-	} else {
-		u32 rp_state_cap = I915_READ(GEN6_RP_STATE_CAP);
-		rps->rp0_freq = (rp_state_cap >>  0) & 0xff;
-		rps->rp1_freq = (rp_state_cap >>  8) & 0xff;
-		rps->min_freq = (rp_state_cap >> 16) & 0xff;
-	}
-	/* hw_max = RP0 until we check for overclocking */
-	rps->max_freq = rps->rp0_freq;
-
-	rps->efficient_freq = rps->rp1_freq;
-	if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv) ||
-	    IS_GEN9_BC(dev_priv) || IS_CANNONLAKE(dev_priv)) {
-		u32 ddcc_status = 0;
-
-		if (sandybridge_pcode_read(dev_priv,
-					   HSW_PCODE_DYNAMIC_DUTY_CYCLE_CONTROL,
-					   &ddcc_status) == 0)
-			rps->efficient_freq =
-				clamp_t(u8,
-					((ddcc_status >> 8) & 0xff),
-					rps->min_freq,
-					rps->max_freq);
-	}
-
-	if (IS_GEN9_BC(dev_priv) || IS_CANNONLAKE(dev_priv)) {
-		/* Store the frequency values in 16.66 MHZ units, which is
-		 * the natural hardware unit for SKL
-		 */
-		rps->rp0_freq *= GEN9_FREQ_SCALER;
-		rps->rp1_freq *= GEN9_FREQ_SCALER;
-		rps->min_freq *= GEN9_FREQ_SCALER;
-		rps->max_freq *= GEN9_FREQ_SCALER;
-		rps->efficient_freq *= GEN9_FREQ_SCALER;
-	}
-}
-
-static void reset_rps(struct drm_i915_private *dev_priv,
-		      int (*set)(struct drm_i915_private *, u8))
-{
-	struct intel_rps *rps = &dev_priv->gt_pm.rps;
-	u8 freq = rps->cur_freq;
-
-	/* force a reset */
-	rps->power = -1;
-	rps->cur_freq = -1;
-
-	if (set(dev_priv, freq))
-		DRM_ERROR("Failed to reset RPS to initial values\n");
-}
-
-/* See the Gen9_GT_PM_Programming_Guide doc for the below */
-static void gen9_enable_rps(struct drm_i915_private *dev_priv)
-{
-	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
-
-	/* Program defaults and thresholds for RPS */
-	if (IS_GEN9(dev_priv))
-		I915_WRITE(GEN6_RC_VIDEO_FREQ,
-			GEN9_FREQUENCY(dev_priv->gt_pm.rps.rp1_freq));
-
-	/* 1 second timeout*/
-	I915_WRITE(GEN6_RP_DOWN_TIMEOUT,
-		GT_INTERVAL_FROM_US(dev_priv, 1000000));
-
-	I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 0xa);
-
-	/* Leaning on the below call to gen6_set_rps to program/setup the
-	 * Up/Down EI & threshold registers, as well as the RP_CONTROL,
-	 * RP_INTERRUPT_LIMITS & RPNSWREQ registers */
-	reset_rps(dev_priv, gen6_set_rps);
-
-	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
-}
-
-static void gen9_enable_rc6(struct drm_i915_private *dev_priv)
-{
-	struct intel_engine_cs *engine;
-	enum intel_engine_id id;
-	u32 rc6_mode;
-
-	/* 1a: Software RC state - RC0 */
-	I915_WRITE(GEN6_RC_STATE, 0);
-
-	/* 1b: Get forcewake during program sequence. Although the driver
-	 * hasn't enabled a state yet where we need forcewake, BIOS may have.*/
-	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
-
-	/* 2a: Disable RC states. */
-	I915_WRITE(GEN6_RC_CONTROL, 0);
-
-	/* 2b: Program RC6 thresholds.*/
-	if (INTEL_GEN(dev_priv) >= 10) {
-		I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 54 << 16 | 85);
-		I915_WRITE(GEN10_MEDIA_WAKE_RATE_LIMIT, 150);
-	} else if (IS_SKYLAKE(dev_priv)) {
-		/*
-		 * WaRsDoubleRc6WrlWithCoarsePowerGating:skl Doubling WRL only
-		 * when CPG is enabled
-		 */
-		I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 108 << 16);
-	} else {
-		I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 54 << 16);
-	}
-
-	I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000); /* 12500 * 1280ns */
-	I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25); /* 25 * 1280ns */
-	for_each_engine(engine, dev_priv, id)
-		I915_WRITE(RING_MAX_IDLE(engine->mmio_base), 10);
-
-	if (HAS_GUC(dev_priv))
-		I915_WRITE(GUC_MAX_IDLE_COUNT, 0xA);
-
-	I915_WRITE(GEN6_RC_SLEEP, 0);
-
-	/* 2c: Program Coarse Power Gating Policies. */
-	I915_WRITE(GEN9_MEDIA_PG_IDLE_HYSTERESIS, 25);
-	I915_WRITE(GEN9_RENDER_PG_IDLE_HYSTERESIS, 25);
-
-	/* 3a: Enable RC6 */
-	I915_WRITE(GEN6_RC6_THRESHOLD, 37500); /* 37.5/125ms per EI */
-
-	/* WaRsUseTimeoutMode:cnl (pre-prod) */
-	if (IS_CNL_REVID(dev_priv, CNL_REVID_A0, CNL_REVID_C0))
-		rc6_mode = GEN7_RC_CTL_TO_MODE;
-	else
-		rc6_mode = GEN6_RC_CTL_EI_MODE(1);
-
-	I915_WRITE(GEN6_RC_CONTROL,
-		   GEN6_RC_CTL_HW_ENABLE |
-		   GEN6_RC_CTL_RC6_ENABLE |
-		   rc6_mode);
-
-	/*
-	 * 3b: Enable Coarse Power Gating only when RC6 is enabled.
-	 * WaRsDisableCoarsePowerGating:skl,bxt - Render/Media PG need to be disabled with RC6.
-	 */
-	if (NEEDS_WaRsDisableCoarsePowerGating(dev_priv))
-		I915_WRITE(GEN9_PG_ENABLE, 0);
-	else
-		I915_WRITE(GEN9_PG_ENABLE,
-			   GEN9_RENDER_PG_ENABLE | GEN9_MEDIA_PG_ENABLE);
-
-	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
-}
-
-static void gen8_enable_rc6(struct drm_i915_private *dev_priv)
-{
-	struct intel_engine_cs *engine;
-	enum intel_engine_id id;
-
-	/* 1a: Software RC state - RC0 */
-	I915_WRITE(GEN6_RC_STATE, 0);
-
-	/* 1b: Get forcewake during program sequence. Although the driver
-	 * hasn't enabled a state yet where we need forcewake, BIOS may have.*/
-	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
-
-	/* 2a: Disable RC states. */
-	I915_WRITE(GEN6_RC_CONTROL, 0);
-
-	/* 2b: Program RC6 thresholds.*/
-	I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 40 << 16);
-	I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000); /* 12500 * 1280ns */
-	I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25); /* 25 * 1280ns */
-	for_each_engine(engine, dev_priv, id)
-		I915_WRITE(RING_MAX_IDLE(engine->mmio_base), 10);
-	I915_WRITE(GEN6_RC_SLEEP, 0);
-	I915_WRITE(GEN6_RC6_THRESHOLD, 625); /* 800us/1.28 for TO */
-
-	/* 3: Enable RC6 */
-
-	I915_WRITE(GEN6_RC_CONTROL,
-		   GEN6_RC_CTL_HW_ENABLE |
-		   GEN7_RC_CTL_TO_MODE |
-		   GEN6_RC_CTL_RC6_ENABLE);
-
-	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
-}
-
-static void gen8_enable_rps(struct drm_i915_private *dev_priv)
-{
-	struct intel_rps *rps = &dev_priv->gt_pm.rps;
-
-	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
-
-	/* 1 Program defaults and thresholds for RPS*/
-	I915_WRITE(GEN6_RPNSWREQ,
-		   HSW_FREQUENCY(rps->rp1_freq));
-	I915_WRITE(GEN6_RC_VIDEO_FREQ,
-		   HSW_FREQUENCY(rps->rp1_freq));
-	/* NB: Docs say 1s, and 1000000 - which aren't equivalent */
-	I915_WRITE(GEN6_RP_DOWN_TIMEOUT, 100000000 / 128); /* 1 second timeout */
-
-	/* Docs recommend 900MHz, and 300 MHz respectively */
-	I915_WRITE(GEN6_RP_INTERRUPT_LIMITS,
-		   rps->max_freq_softlimit << 24 |
-		   rps->min_freq_softlimit << 16);
-
-	I915_WRITE(GEN6_RP_UP_THRESHOLD, 7600000 / 128); /* 76ms busyness per EI, 90% */
-	I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 31300000 / 128); /* 313ms busyness per EI, 70%*/
-	I915_WRITE(GEN6_RP_UP_EI, 66000); /* 84.48ms, XXX: random? */
-	I915_WRITE(GEN6_RP_DOWN_EI, 350000); /* 448ms, XXX: random? */
-
-	I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10);
-
-	/* 2: Enable RPS */
-	I915_WRITE(GEN6_RP_CONTROL,
-		   GEN6_RP_MEDIA_TURBO |
-		   GEN6_RP_MEDIA_HW_NORMAL_MODE |
-		   GEN6_RP_MEDIA_IS_GFX |
-		   GEN6_RP_ENABLE |
-		   GEN6_RP_UP_BUSY_AVG |
-		   GEN6_RP_DOWN_IDLE_AVG);
-
-	reset_rps(dev_priv, gen6_set_rps);
-
-	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
-}
-
-static void gen6_enable_rc6(struct drm_i915_private *dev_priv)
-{
-	struct intel_engine_cs *engine;
-	enum intel_engine_id id;
-	u32 rc6vids, rc6_mask;
-	u32 gtfifodbg;
-	int ret;
-
-	I915_WRITE(GEN6_RC_STATE, 0);
-
-	/* Clear the DBG now so we don't confuse earlier errors */
-	gtfifodbg = I915_READ(GTFIFODBG);
-	if (gtfifodbg) {
-		DRM_ERROR("GT fifo had a previous error %x\n", gtfifodbg);
-		I915_WRITE(GTFIFODBG, gtfifodbg);
-	}
-
-	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
-
-	/* disable the counters and set deterministic thresholds */
-	I915_WRITE(GEN6_RC_CONTROL, 0);
-
-	I915_WRITE(GEN6_RC1_WAKE_RATE_LIMIT, 1000 << 16);
-	I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 40 << 16 | 30);
-	I915_WRITE(GEN6_RC6pp_WAKE_RATE_LIMIT, 30);
-	I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000);
-	I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25);
-
-	for_each_engine(engine, dev_priv, id)
-		I915_WRITE(RING_MAX_IDLE(engine->mmio_base), 10);
-
-	I915_WRITE(GEN6_RC_SLEEP, 0);
-	I915_WRITE(GEN6_RC1e_THRESHOLD, 1000);
-	if (IS_IVYBRIDGE(dev_priv))
-		I915_WRITE(GEN6_RC6_THRESHOLD, 125000);
-	else
-		I915_WRITE(GEN6_RC6_THRESHOLD, 50000);
-	I915_WRITE(GEN6_RC6p_THRESHOLD, 150000);
-	I915_WRITE(GEN6_RC6pp_THRESHOLD, 64000); /* unused */
-
-	/* We don't use those on Haswell */
-	rc6_mask = GEN6_RC_CTL_RC6_ENABLE;
-	if (HAS_RC6p(dev_priv))
-		rc6_mask |= GEN6_RC_CTL_RC6p_ENABLE;
-	if (HAS_RC6pp(dev_priv))
-		rc6_mask |= GEN6_RC_CTL_RC6pp_ENABLE;
-	I915_WRITE(GEN6_RC_CONTROL,
-		   rc6_mask |
-		   GEN6_RC_CTL_EI_MODE(1) |
-		   GEN6_RC_CTL_HW_ENABLE);
-
-	rc6vids = 0;
-	ret = sandybridge_pcode_read(dev_priv, GEN6_PCODE_READ_RC6VIDS, &rc6vids);
-	if (IS_GEN6(dev_priv) && ret) {
-		DRM_DEBUG_DRIVER("Couldn't check for BIOS workaround\n");
-	} else if (IS_GEN6(dev_priv) && (GEN6_DECODE_RC6_VID(rc6vids & 0xff) < 450)) {
-		DRM_DEBUG_DRIVER("You should update your BIOS. Correcting minimum rc6 voltage (%dmV->%dmV)\n",
-			  GEN6_DECODE_RC6_VID(rc6vids & 0xff), 450);
-		rc6vids &= 0xffff00;
-		rc6vids |= GEN6_ENCODE_RC6_VID(450);
-		ret = sandybridge_pcode_write(dev_priv, GEN6_PCODE_WRITE_RC6VIDS, rc6vids);
-		if (ret)
-			DRM_ERROR("Couldn't fix incorrect rc6 voltage\n");
-	}
-
-	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
-}
-
-static void gen6_enable_rps(struct drm_i915_private *dev_priv)
-{
-	/* Here begins a magic sequence of register writes to enable
-	 * auto-downclocking.
-	 *
-	 * Perhaps there might be some value in exposing these to
-	 * userspace...
-	 */
-	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
-
-	/* Power down if completely idle for over 50ms */
-	I915_WRITE(GEN6_RP_DOWN_TIMEOUT, 50000);
-	I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10);
-
-	reset_rps(dev_priv, gen6_set_rps);
-
-	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
-}
-
-static void gen6_update_ring_freq(struct drm_i915_private *dev_priv)
-{
-	struct intel_rps *rps = &dev_priv->gt_pm.rps;
-	int min_freq = 15;
-	unsigned int gpu_freq;
-	unsigned int max_ia_freq, min_ring_freq;
-	unsigned int max_gpu_freq, min_gpu_freq;
-	int scaling_factor = 180;
-	struct cpufreq_policy *policy;
-
-	WARN_ON(!mutex_is_locked(&dev_priv->pcu_lock));
-
-	policy = cpufreq_cpu_get(0);
-	if (policy) {
-		max_ia_freq = policy->cpuinfo.max_freq;
-		cpufreq_cpu_put(policy);
-	} else {
-		/*
-		 * Default to measured freq if none found, PCU will ensure we
-		 * don't go over
-		 */
-		max_ia_freq = tsc_khz;
-	}
-
-	/* Convert from kHz to MHz */
-	max_ia_freq /= 1000;
-
-	min_ring_freq = I915_READ(DCLK) & 0xf;
-	/* convert DDR frequency from units of 266.6MHz to bandwidth */
-	min_ring_freq = mult_frac(min_ring_freq, 8, 3);
-
-	if (IS_GEN9_BC(dev_priv) || IS_CANNONLAKE(dev_priv)) {
-		/* Convert GT frequency to 50 HZ units */
-		min_gpu_freq = rps->min_freq / GEN9_FREQ_SCALER;
-		max_gpu_freq = rps->max_freq / GEN9_FREQ_SCALER;
-	} else {
-		min_gpu_freq = rps->min_freq;
-		max_gpu_freq = rps->max_freq;
-	}
-
-	/*
-	 * For each potential GPU frequency, load a ring frequency we'd like
-	 * to use for memory access.  We do this by specifying the IA frequency
-	 * the PCU should use as a reference to determine the ring frequency.
-	 */
-	for (gpu_freq = max_gpu_freq; gpu_freq >= min_gpu_freq; gpu_freq--) {
-		int diff = max_gpu_freq - gpu_freq;
-		unsigned int ia_freq = 0, ring_freq = 0;
-
-		if (IS_GEN9_BC(dev_priv) || IS_CANNONLAKE(dev_priv)) {
-			/*
-			 * ring_freq = 2 * GT. ring_freq is in 100MHz units
-			 * No floor required for ring frequency on SKL.
-			 */
-			ring_freq = gpu_freq;
-		} else if (INTEL_INFO(dev_priv)->gen >= 8) {
-			/* max(2 * GT, DDR). NB: GT is 50MHz units */
-			ring_freq = max(min_ring_freq, gpu_freq);
-		} else if (IS_HASWELL(dev_priv)) {
-			ring_freq = mult_frac(gpu_freq, 5, 4);
-			ring_freq = max(min_ring_freq, ring_freq);
-			/* leave ia_freq as the default, chosen by cpufreq */
-		} else {
-			/* On older processors, there is no separate ring
-			 * clock domain, so in order to boost the bandwidth
-			 * of the ring, we need to upclock the CPU (ia_freq).
-			 *
-			 * For GPU frequencies less than 750MHz,
-			 * just use the lowest ring freq.
-			 */
-			if (gpu_freq < min_freq)
-				ia_freq = 800;
-			else
-				ia_freq = max_ia_freq - ((diff * scaling_factor) / 2);
-			ia_freq = DIV_ROUND_CLOSEST(ia_freq, 100);
-		}
-
-		sandybridge_pcode_write(dev_priv,
-					GEN6_PCODE_WRITE_MIN_FREQ_TABLE,
-					ia_freq << GEN6_PCODE_FREQ_IA_RATIO_SHIFT |
-					ring_freq << GEN6_PCODE_FREQ_RING_RATIO_SHIFT |
-					gpu_freq);
-	}
-}
-
-static int cherryview_rps_max_freq(struct drm_i915_private *dev_priv)
-{
-	u32 val, rp0;
-
-	val = vlv_punit_read(dev_priv, FB_GFX_FMAX_AT_VMAX_FUSE);
-
-	switch (INTEL_INFO(dev_priv)->sseu.eu_total) {
-	case 8:
-		/* (2 * 4) config */
-		rp0 = (val >> FB_GFX_FMAX_AT_VMAX_2SS4EU_FUSE_SHIFT);
-		break;
-	case 12:
-		/* (2 * 6) config */
-		rp0 = (val >> FB_GFX_FMAX_AT_VMAX_2SS6EU_FUSE_SHIFT);
-		break;
-	case 16:
-		/* (2 * 8) config */
-	default:
-		/* Setting (2 * 8) Min RP0 for any other combination */
-		rp0 = (val >> FB_GFX_FMAX_AT_VMAX_2SS8EU_FUSE_SHIFT);
-		break;
-	}
-
-	rp0 = (rp0 & FB_GFX_FREQ_FUSE_MASK);
-
-	return rp0;
-}
-
-static int cherryview_rps_rpe_freq(struct drm_i915_private *dev_priv)
-{
-	u32 val, rpe;
-
-	val = vlv_punit_read(dev_priv, PUNIT_GPU_DUTYCYCLE_REG);
-	rpe = (val >> PUNIT_GPU_DUTYCYCLE_RPE_FREQ_SHIFT) & PUNIT_GPU_DUTYCYCLE_RPE_FREQ_MASK;
-
-	return rpe;
-}
-
-static int cherryview_rps_guar_freq(struct drm_i915_private *dev_priv)
-{
-	u32 val, rp1;
-
-	val = vlv_punit_read(dev_priv, FB_GFX_FMAX_AT_VMAX_FUSE);
-	rp1 = (val & FB_GFX_FREQ_FUSE_MASK);
-
-	return rp1;
-}
-
-static u32 cherryview_rps_min_freq(struct drm_i915_private *dev_priv)
-{
-	u32 val, rpn;
-
-	val = vlv_punit_read(dev_priv, FB_GFX_FMIN_AT_VMIN_FUSE);
-	rpn = ((val >> FB_GFX_FMIN_AT_VMIN_FUSE_SHIFT) &
-		       FB_GFX_FREQ_FUSE_MASK);
-
-	return rpn;
-}
-
-static int valleyview_rps_guar_freq(struct drm_i915_private *dev_priv)
-{
-	u32 val, rp1;
-
-	val = vlv_nc_read(dev_priv, IOSF_NC_FB_GFX_FREQ_FUSE);
-
-	rp1 = (val & FB_GFX_FGUARANTEED_FREQ_FUSE_MASK) >> FB_GFX_FGUARANTEED_FREQ_FUSE_SHIFT;
-
-	return rp1;
-}
-
-static int valleyview_rps_max_freq(struct drm_i915_private *dev_priv)
-{
-	u32 val, rp0;
-
-	val = vlv_nc_read(dev_priv, IOSF_NC_FB_GFX_FREQ_FUSE);
-
-	rp0 = (val & FB_GFX_MAX_FREQ_FUSE_MASK) >> FB_GFX_MAX_FREQ_FUSE_SHIFT;
-	/* Clamp to max */
-	rp0 = min_t(u32, rp0, 0xea);
-
-	return rp0;
-}
-
-static int valleyview_rps_rpe_freq(struct drm_i915_private *dev_priv)
-{
-	u32 val, rpe;
-
-	val = vlv_nc_read(dev_priv, IOSF_NC_FB_GFX_FMAX_FUSE_LO);
-	rpe = (val & FB_FMAX_VMIN_FREQ_LO_MASK) >> FB_FMAX_VMIN_FREQ_LO_SHIFT;
-	val = vlv_nc_read(dev_priv, IOSF_NC_FB_GFX_FMAX_FUSE_HI);
-	rpe |= (val & FB_FMAX_VMIN_FREQ_HI_MASK) << 5;
-
-	return rpe;
-}
-
-static int valleyview_rps_min_freq(struct drm_i915_private *dev_priv)
-{
-	u32 val;
-
-	val = vlv_punit_read(dev_priv, PUNIT_REG_GPU_LFM) & 0xff;
-	/*
-	 * According to the BYT Punit GPU turbo HAS 1.1.6.3 the minimum value
-	 * for the minimum frequency in GPLL mode is 0xc1. Contrary to this on
-	 * a BYT-M B0 the above register contains 0xbf. Moreover when setting
-	 * a frequency Punit will not allow values below 0xc0. Clamp it 0xc0
-	 * to make sure it matches what Punit accepts.
-	 */
-	return max_t(u32, val, 0xc0);
-}
-
-/* Check that the pctx buffer wasn't move under us. */
-static void valleyview_check_pctx(struct drm_i915_private *dev_priv)
-{
-	unsigned long pctx_addr = I915_READ(VLV_PCBR) & ~4095;
-
-	WARN_ON(pctx_addr != dev_priv->mm.stolen_base +
-			     dev_priv->vlv_pctx->stolen->start);
-}
-
-
-/* Check that the pcbr address is not empty. */
-static void cherryview_check_pctx(struct drm_i915_private *dev_priv)
-{
-	unsigned long pctx_addr = I915_READ(VLV_PCBR) & ~4095;
-
-	WARN_ON((pctx_addr >> VLV_PCBR_ADDR_SHIFT) == 0);
-}
-
-static void cherryview_setup_pctx(struct drm_i915_private *dev_priv)
-{
-	struct i915_ggtt *ggtt = &dev_priv->ggtt;
-	unsigned long pctx_paddr, paddr;
-	u32 pcbr;
-	int pctx_size = 32*1024;
-
-	pcbr = I915_READ(VLV_PCBR);
-	if ((pcbr >> VLV_PCBR_ADDR_SHIFT) == 0) {
-		DRM_DEBUG_DRIVER("BIOS didn't set up PCBR, fixing up\n");
-		paddr = (dev_priv->mm.stolen_base +
-			 (ggtt->stolen_size - pctx_size));
-
-		pctx_paddr = (paddr & (~4095));
-		I915_WRITE(VLV_PCBR, pctx_paddr);
-	}
-
-	DRM_DEBUG_DRIVER("PCBR: 0x%08x\n", I915_READ(VLV_PCBR));
-}
-
-static void valleyview_setup_pctx(struct drm_i915_private *dev_priv)
-{
-	struct drm_i915_gem_object *pctx;
-	unsigned long pctx_paddr;
-	u32 pcbr;
-	int pctx_size = 24*1024;
-
-	pcbr = I915_READ(VLV_PCBR);
-	if (pcbr) {
-		/* BIOS set it up already, grab the pre-alloc'd space */
-		int pcbr_offset;
-
-		pcbr_offset = (pcbr & (~4095)) - dev_priv->mm.stolen_base;
-		pctx = i915_gem_object_create_stolen_for_preallocated(dev_priv,
-								      pcbr_offset,
-								      I915_GTT_OFFSET_NONE,
-								      pctx_size);
-		goto out;
-	}
-
-	DRM_DEBUG_DRIVER("BIOS didn't set up PCBR, fixing up\n");
-
-	/*
-	 * From the Gunit register HAS:
-	 * The Gfx driver is expected to program this register and ensure
-	 * proper allocation within Gfx stolen memory.  For example, this
-	 * register should be programmed such than the PCBR range does not
-	 * overlap with other ranges, such as the frame buffer, protected
-	 * memory, or any other relevant ranges.
-	 */
-	pctx = i915_gem_object_create_stolen(dev_priv, pctx_size);
-	if (!pctx) {
-		DRM_DEBUG("not enough stolen space for PCTX, disabling\n");
-		goto out;
-	}
-
-	pctx_paddr = dev_priv->mm.stolen_base + pctx->stolen->start;
-	I915_WRITE(VLV_PCBR, pctx_paddr);
-
-out:
-	DRM_DEBUG_DRIVER("PCBR: 0x%08x\n", I915_READ(VLV_PCBR));
-	dev_priv->vlv_pctx = pctx;
-}
-
-static void valleyview_cleanup_pctx(struct drm_i915_private *dev_priv)
-{
-	if (WARN_ON(!dev_priv->vlv_pctx))
-		return;
-
-	i915_gem_object_put(dev_priv->vlv_pctx);
-	dev_priv->vlv_pctx = NULL;
-}
-
-static void vlv_init_gpll_ref_freq(struct drm_i915_private *dev_priv)
-{
-	dev_priv->gt_pm.rps.gpll_ref_freq =
-		vlv_get_cck_clock(dev_priv, "GPLL ref",
-				  CCK_GPLL_CLOCK_CONTROL,
-				  dev_priv->czclk_freq);
-
-	DRM_DEBUG_DRIVER("GPLL reference freq: %d kHz\n",
-			 dev_priv->gt_pm.rps.gpll_ref_freq);
-}
-
-static void valleyview_init_gt_powersave(struct drm_i915_private *dev_priv)
-{
-	struct intel_rps *rps = &dev_priv->gt_pm.rps;
-	u32 val;
-
-	valleyview_setup_pctx(dev_priv);
-
-	vlv_init_gpll_ref_freq(dev_priv);
-
-	val = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS);
-	switch ((val >> 6) & 3) {
-	case 0:
-	case 1:
-		dev_priv->mem_freq = 800;
-		break;
-	case 2:
-		dev_priv->mem_freq = 1066;
-		break;
-	case 3:
-		dev_priv->mem_freq = 1333;
-		break;
-	}
-	DRM_DEBUG_DRIVER("DDR speed: %d MHz\n", dev_priv->mem_freq);
-
-	rps->max_freq = valleyview_rps_max_freq(dev_priv);
-	rps->rp0_freq = rps->max_freq;
-	DRM_DEBUG_DRIVER("max GPU freq: %d MHz (%u)\n",
-			 intel_gpu_freq(dev_priv, rps->max_freq),
-			 rps->max_freq);
-
-	rps->efficient_freq = valleyview_rps_rpe_freq(dev_priv);
-	DRM_DEBUG_DRIVER("RPe GPU freq: %d MHz (%u)\n",
-			 intel_gpu_freq(dev_priv, rps->efficient_freq),
-			 rps->efficient_freq);
-
-	rps->rp1_freq = valleyview_rps_guar_freq(dev_priv);
-	DRM_DEBUG_DRIVER("RP1(Guar Freq) GPU freq: %d MHz (%u)\n",
-			 intel_gpu_freq(dev_priv, rps->rp1_freq),
-			 rps->rp1_freq);
-
-	rps->min_freq = valleyview_rps_min_freq(dev_priv);
-	DRM_DEBUG_DRIVER("min GPU freq: %d MHz (%u)\n",
-			 intel_gpu_freq(dev_priv, rps->min_freq),
-			 rps->min_freq);
-}
-
-static void cherryview_init_gt_powersave(struct drm_i915_private *dev_priv)
-{
-	struct intel_rps *rps = &dev_priv->gt_pm.rps;
-	u32 val;
-
-	cherryview_setup_pctx(dev_priv);
-
-	vlv_init_gpll_ref_freq(dev_priv);
-
-	mutex_lock(&dev_priv->sb_lock);
-	val = vlv_cck_read(dev_priv, CCK_FUSE_REG);
-	mutex_unlock(&dev_priv->sb_lock);
-
-	switch ((val >> 2) & 0x7) {
-	case 3:
-		dev_priv->mem_freq = 2000;
-		break;
-	default:
-		dev_priv->mem_freq = 1600;
-		break;
-	}
-	DRM_DEBUG_DRIVER("DDR speed: %d MHz\n", dev_priv->mem_freq);
-
-	rps->max_freq = cherryview_rps_max_freq(dev_priv);
-	rps->rp0_freq = rps->max_freq;
-	DRM_DEBUG_DRIVER("max GPU freq: %d MHz (%u)\n",
-			 intel_gpu_freq(dev_priv, rps->max_freq),
-			 rps->max_freq);
-
-	rps->efficient_freq = cherryview_rps_rpe_freq(dev_priv);
-	DRM_DEBUG_DRIVER("RPe GPU freq: %d MHz (%u)\n",
-			 intel_gpu_freq(dev_priv, rps->efficient_freq),
-			 rps->efficient_freq);
-
-	rps->rp1_freq = cherryview_rps_guar_freq(dev_priv);
-	DRM_DEBUG_DRIVER("RP1(Guar) GPU freq: %d MHz (%u)\n",
-			 intel_gpu_freq(dev_priv, rps->rp1_freq),
-			 rps->rp1_freq);
-
-	rps->min_freq = cherryview_rps_min_freq(dev_priv);
-	DRM_DEBUG_DRIVER("min GPU freq: %d MHz (%u)\n",
-			 intel_gpu_freq(dev_priv, rps->min_freq),
-			 rps->min_freq);
-
-	WARN_ONCE((rps->max_freq | rps->efficient_freq | rps->rp1_freq |
-		   rps->min_freq) & 1,
-		  "Odd GPU freq values\n");
-}
-
-static void valleyview_cleanup_gt_powersave(struct drm_i915_private *dev_priv)
-{
-	valleyview_cleanup_pctx(dev_priv);
-}
-
-static void cherryview_enable_rc6(struct drm_i915_private *dev_priv)
-{
-	struct intel_engine_cs *engine;
-	enum intel_engine_id id;
-	u32 gtfifodbg, rc6_mode, pcbr;
-
-	gtfifodbg = I915_READ(GTFIFODBG) & ~(GT_FIFO_SBDEDICATE_FREE_ENTRY_CHV |
-					     GT_FIFO_FREE_ENTRIES_CHV);
-	if (gtfifodbg) {
-		DRM_DEBUG_DRIVER("GT fifo had a previous error %x\n",
-				 gtfifodbg);
-		I915_WRITE(GTFIFODBG, gtfifodbg);
-	}
-
-	cherryview_check_pctx(dev_priv);
-
-	/* 1a & 1b: Get forcewake during program sequence. Although the driver
-	 * hasn't enabled a state yet where we need forcewake, BIOS may have.*/
-	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
-
-	/*  Disable RC states. */
-	I915_WRITE(GEN6_RC_CONTROL, 0);
-
-	/* 2a: Program RC6 thresholds.*/
-	I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 40 << 16);
-	I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000); /* 12500 * 1280ns */
-	I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25); /* 25 * 1280ns */
-
-	for_each_engine(engine, dev_priv, id)
-		I915_WRITE(RING_MAX_IDLE(engine->mmio_base), 10);
-	I915_WRITE(GEN6_RC_SLEEP, 0);
-
-	/* TO threshold set to 500 us ( 0x186 * 1.28 us) */
-	I915_WRITE(GEN6_RC6_THRESHOLD, 0x186);
-
-	/* Allows RC6 residency counter to work */
-	I915_WRITE(VLV_COUNTER_CONTROL,
-		   _MASKED_BIT_ENABLE(VLV_COUNT_RANGE_HIGH |
-				      VLV_MEDIA_RC6_COUNT_EN |
-				      VLV_RENDER_RC6_COUNT_EN));
-
-	/* For now we assume BIOS is allocating and populating the PCBR  */
-	pcbr = I915_READ(VLV_PCBR);
-
-	/* 3: Enable RC6 */
-	rc6_mode = 0;
-	if (pcbr >> VLV_PCBR_ADDR_SHIFT)
-		rc6_mode = GEN7_RC_CTL_TO_MODE;
-	I915_WRITE(GEN6_RC_CONTROL, rc6_mode);
-
-	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
-}
-
-static void cherryview_enable_rps(struct drm_i915_private *dev_priv)
-{
-	u32 val;
-
-	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
-
-	/* 1: Program defaults and thresholds for RPS*/
-	I915_WRITE(GEN6_RP_DOWN_TIMEOUT, 1000000);
-	I915_WRITE(GEN6_RP_UP_THRESHOLD, 59400);
-	I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 245000);
-	I915_WRITE(GEN6_RP_UP_EI, 66000);
-	I915_WRITE(GEN6_RP_DOWN_EI, 350000);
-
-	I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10);
-
-	/* 2: Enable RPS */
-	I915_WRITE(GEN6_RP_CONTROL,
-		   GEN6_RP_MEDIA_HW_NORMAL_MODE |
-		   GEN6_RP_MEDIA_IS_GFX |
-		   GEN6_RP_ENABLE |
-		   GEN6_RP_UP_BUSY_AVG |
-		   GEN6_RP_DOWN_IDLE_AVG);
-
-	/* Setting Fixed Bias */
-	val = VLV_OVERRIDE_EN |
-		  VLV_SOC_TDP_EN |
-		  CHV_BIAS_CPU_50_SOC_50;
-	vlv_punit_write(dev_priv, VLV_TURBO_SOC_OVERRIDE, val);
-
-	val = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS);
-
-	/* RPS code assumes GPLL is used */
-	WARN_ONCE((val & GPLLENABLE) == 0, "GPLL not enabled\n");
-
-	DRM_DEBUG_DRIVER("GPLL enabled? %s\n", yesno(val & GPLLENABLE));
-	DRM_DEBUG_DRIVER("GPU status: 0x%08x\n", val);
-
-	reset_rps(dev_priv, valleyview_set_rps);
-
-	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
-}
-
-static void valleyview_enable_rc6(struct drm_i915_private *dev_priv)
-{
-	struct intel_engine_cs *engine;
-	enum intel_engine_id id;
-	u32 gtfifodbg;
-
-	valleyview_check_pctx(dev_priv);
-
-	gtfifodbg = I915_READ(GTFIFODBG);
-	if (gtfifodbg) {
-		DRM_DEBUG_DRIVER("GT fifo had a previous error %x\n",
-				 gtfifodbg);
-		I915_WRITE(GTFIFODBG, gtfifodbg);
-	}
-
-	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
-
-	/*  Disable RC states. */
-	I915_WRITE(GEN6_RC_CONTROL, 0);
-
-	I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 0x00280000);
-	I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000);
-	I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25);
-
-	for_each_engine(engine, dev_priv, id)
-		I915_WRITE(RING_MAX_IDLE(engine->mmio_base), 10);
-
-	I915_WRITE(GEN6_RC6_THRESHOLD, 0x557);
-
-	/* Allows RC6 residency counter to work */
-	I915_WRITE(VLV_COUNTER_CONTROL,
-		   _MASKED_BIT_ENABLE(VLV_COUNT_RANGE_HIGH |
-				      VLV_MEDIA_RC0_COUNT_EN |
-				      VLV_RENDER_RC0_COUNT_EN |
-				      VLV_MEDIA_RC6_COUNT_EN |
-				      VLV_RENDER_RC6_COUNT_EN));
-
-	I915_WRITE(GEN6_RC_CONTROL,
-		   GEN7_RC_CTL_TO_MODE | VLV_RC_CTL_CTX_RST_PARALLEL);
-
-	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
-}
-
-static void valleyview_enable_rps(struct drm_i915_private *dev_priv)
-{
-	u32 val;
-
-	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
-
-	I915_WRITE(GEN6_RP_DOWN_TIMEOUT, 1000000);
-	I915_WRITE(GEN6_RP_UP_THRESHOLD, 59400);
-	I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 245000);
-	I915_WRITE(GEN6_RP_UP_EI, 66000);
-	I915_WRITE(GEN6_RP_DOWN_EI, 350000);
-
-	I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10);
-
-	I915_WRITE(GEN6_RP_CONTROL,
-		   GEN6_RP_MEDIA_TURBO |
-		   GEN6_RP_MEDIA_HW_NORMAL_MODE |
-		   GEN6_RP_MEDIA_IS_GFX |
-		   GEN6_RP_ENABLE |
-		   GEN6_RP_UP_BUSY_AVG |
-		   GEN6_RP_DOWN_IDLE_CONT);
-
-	/* Setting Fixed Bias */
-	val = VLV_OVERRIDE_EN |
-		  VLV_SOC_TDP_EN |
-		  VLV_BIAS_CPU_125_SOC_875;
-	vlv_punit_write(dev_priv, VLV_TURBO_SOC_OVERRIDE, val);
-
-	val = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS);
-
-	/* RPS code assumes GPLL is used */
-	WARN_ONCE((val & GPLLENABLE) == 0, "GPLL not enabled\n");
-
-	DRM_DEBUG_DRIVER("GPLL enabled? %s\n", yesno(val & GPLLENABLE));
-	DRM_DEBUG_DRIVER("GPU status: 0x%08x\n", val);
-
-	reset_rps(dev_priv, valleyview_set_rps);
-
-	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
-}
-
-static unsigned long intel_pxfreq(u32 vidfreq)
-{
-	unsigned long freq;
-	int div = (vidfreq & 0x3f0000) >> 16;
-	int post = (vidfreq & 0x3000) >> 12;
-	int pre = (vidfreq & 0x7);
-
-	if (!pre)
-		return 0;
-
-	freq = ((div * 133333) / ((1<<post) * pre));
-
-	return freq;
-}
-
-static const struct cparams {
-	u16 i;
-	u16 t;
-	u16 m;
-	u16 c;
-} cparams[] = {
-	{ 1, 1333, 301, 28664 },
-	{ 1, 1066, 294, 24460 },
-	{ 1, 800, 294, 25192 },
-	{ 0, 1333, 276, 27605 },
-	{ 0, 1066, 276, 27605 },
-	{ 0, 800, 231, 23784 },
-};
-
-static unsigned long __i915_chipset_val(struct drm_i915_private *dev_priv)
-{
-	u64 total_count, diff, ret;
-	u32 count1, count2, count3, m = 0, c = 0;
-	unsigned long now = jiffies_to_msecs(jiffies), diff1;
-	int i;
-
-	lockdep_assert_held(&mchdev_lock);
-
-	diff1 = now - dev_priv->ips.last_time1;
-
-	/* Prevent division-by-zero if we are asking too fast.
-	 * Also, we don't get interesting results if we are polling
-	 * faster than once in 10ms, so just return the saved value
-	 * in such cases.
-	 */
-	if (diff1 <= 10)
-		return dev_priv->ips.chipset_power;
-
-	count1 = I915_READ(DMIEC);
-	count2 = I915_READ(DDREC);
-	count3 = I915_READ(CSIEC);
-
-	total_count = count1 + count2 + count3;
-
-	/* FIXME: handle per-counter overflow */
-	if (total_count < dev_priv->ips.last_count1) {
-		diff = ~0UL - dev_priv->ips.last_count1;
-		diff += total_count;
-	} else {
-		diff = total_count - dev_priv->ips.last_count1;
-	}
-
-	for (i = 0; i < ARRAY_SIZE(cparams); i++) {
-		if (cparams[i].i == dev_priv->ips.c_m &&
-		    cparams[i].t == dev_priv->ips.r_t) {
-			m = cparams[i].m;
-			c = cparams[i].c;
-			break;
-		}
-	}
-
-	diff = div_u64(diff, diff1);
-	ret = ((m * diff) + c);
-	ret = div_u64(ret, 10);
-
-	dev_priv->ips.last_count1 = total_count;
-	dev_priv->ips.last_time1 = now;
-
-	dev_priv->ips.chipset_power = ret;
-
-	return ret;
-}
-
-unsigned long i915_chipset_val(struct drm_i915_private *dev_priv)
-{
-	unsigned long val;
-
-	if (INTEL_INFO(dev_priv)->gen != 5)
-		return 0;
-
-	intel_runtime_pm_get(dev_priv);
-	spin_lock_irq(&mchdev_lock);
-
-	val = __i915_chipset_val(dev_priv);
-
-	spin_unlock_irq(&mchdev_lock);
-	intel_runtime_pm_put(dev_priv);
-
-	return val;
-}
-
-unsigned long i915_mch_val(struct drm_i915_private *dev_priv)
-{
-	unsigned long m, x, b;
-	u32 tsfs;
-
-	tsfs = I915_READ(TSFS);
-
-	m = ((tsfs & TSFS_SLOPE_MASK) >> TSFS_SLOPE_SHIFT);
-	x = I915_READ8(TR1);
-
-	b = tsfs & TSFS_INTR_MASK;
-
-	return ((m * x) / 127) - b;
-}
-
-static int _pxvid_to_vd(u8 pxvid)
-{
-	if (pxvid == 0)
-		return 0;
-
-	if (pxvid >= 8 && pxvid < 31)
-		pxvid = 31;
-
-	return (pxvid + 2) * 125;
-}
-
-static u32 pvid_to_extvid(struct drm_i915_private *dev_priv, u8 pxvid)
-{
-	const int vd = _pxvid_to_vd(pxvid);
-	const int vm = vd - 1125;
-
-	if (INTEL_INFO(dev_priv)->is_mobile)
-		return vm > 0 ? vm : 0;
-
-	return vd;
-}
-
-static void __i915_update_gfx_val(struct drm_i915_private *dev_priv)
-{
-	u64 now, diff, diffms;
-	u32 count;
-
-	lockdep_assert_held(&mchdev_lock);
-
-	now = ktime_get_raw_ns();
-	diffms = now - dev_priv->ips.last_time2;
-	do_div(diffms, NSEC_PER_MSEC);
-
-	/* Don't divide by 0 */
-	if (!diffms)
-		return;
-
-	count = I915_READ(GFXEC);
-
-	if (count < dev_priv->ips.last_count2) {
-		diff = ~0UL - dev_priv->ips.last_count2;
-		diff += count;
-	} else {
-		diff = count - dev_priv->ips.last_count2;
-	}
-
-	dev_priv->ips.last_count2 = count;
-	dev_priv->ips.last_time2 = now;
-
-	/* More magic constants... */
-	diff = diff * 1181;
-	diff = div_u64(diff, diffms * 10);
-	dev_priv->ips.gfx_power = diff;
-}
-
-void i915_update_gfx_val(struct drm_i915_private *dev_priv)
-{
-	if (INTEL_INFO(dev_priv)->gen != 5)
-		return;
-
-	intel_runtime_pm_get(dev_priv);
-	spin_lock_irq(&mchdev_lock);
-
-	__i915_update_gfx_val(dev_priv);
-
-	spin_unlock_irq(&mchdev_lock);
-	intel_runtime_pm_put(dev_priv);
-}
-
-static unsigned long __i915_gfx_val(struct drm_i915_private *dev_priv)
-{
-	unsigned long t, corr, state1, corr2, state2;
-	u32 pxvid, ext_v;
-
-	lockdep_assert_held(&mchdev_lock);
-
-	pxvid = I915_READ(PXVFREQ(dev_priv->gt_pm.rps.cur_freq));
-	pxvid = (pxvid >> 24) & 0x7f;
-	ext_v = pvid_to_extvid(dev_priv, pxvid);
-
-	state1 = ext_v;
-
-	t = i915_mch_val(dev_priv);
-
-	/* Revel in the empirically derived constants */
-
-	/* Correction factor in 1/100000 units */
-	if (t > 80)
-		corr = ((t * 2349) + 135940);
-	else if (t >= 50)
-		corr = ((t * 964) + 29317);
-	else /* < 50 */
-		corr = ((t * 301) + 1004);
-
-	corr = corr * ((150142 * state1) / 10000 - 78642);
-	corr /= 100000;
-	corr2 = (corr * dev_priv->ips.corr);
-
-	state2 = (corr2 * state1) / 10000;
-	state2 /= 100; /* convert to mW */
-
-	__i915_update_gfx_val(dev_priv);
-
-	return dev_priv->ips.gfx_power + state2;
-}
-
-unsigned long i915_gfx_val(struct drm_i915_private *dev_priv)
-{
-	unsigned long val;
-
-	if (INTEL_INFO(dev_priv)->gen != 5)
-		return 0;
-
-	intel_runtime_pm_get(dev_priv);
-	spin_lock_irq(&mchdev_lock);
-
-	val = __i915_gfx_val(dev_priv);
-
-	spin_unlock_irq(&mchdev_lock);
-	intel_runtime_pm_put(dev_priv);
-
-	return val;
-}
-
-static struct drm_i915_private *i915_mch_dev;
-
-static struct drm_i915_private *mchdev_get(void)
-{
-	struct drm_i915_private *i915;
-
-	rcu_read_lock();
-	i915 = i915_mch_dev;
-	if (!kref_get_unless_zero(&i915->drm.ref))
-		i915 = NULL;
-	rcu_read_unlock();
-
-	return i915;
-}
-
-/**
- * i915_read_mch_val - return value for IPS use
- *
- * Calculate and return a value for the IPS driver to use when deciding whether
- * we have thermal and power headroom to increase CPU or GPU power budget.
- */
-unsigned long i915_read_mch_val(void)
-{
-	struct drm_i915_private *i915;
-	unsigned long chipset_val, graphics_val;
-
-	i915 = mchdev_get();
-	if (!i915)
-		return 0;
-
-	intel_runtime_pm_get(i915);
-	spin_lock_irq(&mchdev_lock);
-	chipset_val = __i915_chipset_val(i915);
-	graphics_val = __i915_gfx_val(i915);
-	spin_unlock_irq(&mchdev_lock);
-	intel_runtime_pm_put(i915);
-
-	drm_dev_put(&i915->drm);
-	return chipset_val + graphics_val;
-}
-EXPORT_SYMBOL_GPL(i915_read_mch_val);
-
-/**
- * i915_gpu_raise - raise GPU frequency limit
- *
- * Raise the limit; IPS indicates we have thermal headroom.
- */
-bool i915_gpu_raise(void)
-{
-	struct drm_i915_private *i915;
-
-	i915 = mchdev_get();
-	if (!i915)
-		return false;
-
-	spin_lock_irq(&mchdev_lock);
-	if (i915->ips.max_delay > i915->ips.fmax)
-		i915->ips.max_delay--;
-	spin_unlock_irq(&mchdev_lock);
-
-	drm_dev_put(&i915->drm);
-	return true;
-}
-EXPORT_SYMBOL_GPL(i915_gpu_raise);
-
-/**
- * i915_gpu_lower - lower GPU frequency limit
- *
- * IPS indicates we're close to a thermal limit, so throttle back the GPU
- * frequency maximum.
- */
-bool i915_gpu_lower(void)
-{
-	struct drm_i915_private *i915;
-
-	i915 = mchdev_get();
-	if (!i915)
-		return false;
-
-	spin_lock_irq(&mchdev_lock);
-	if (i915->ips.max_delay < i915->ips.min_delay)
-		i915->ips.max_delay++;
-	spin_unlock_irq(&mchdev_lock);
-
-	drm_dev_put(&i915->drm);
-	return true;
-}
-EXPORT_SYMBOL_GPL(i915_gpu_lower);
-
-/**
- * i915_gpu_busy - indicate GPU business to IPS
- *
- * Tell the IPS driver whether or not the GPU is busy.
- */
-bool i915_gpu_busy(void)
-{
-	struct drm_i915_private *i915;
-	bool ret;
-
-	i915 = mchdev_get();
-	if (!i915)
-		return false;
-
-	ret = i915->gt.awake;
-
-	drm_dev_put(&i915->drm);
-	return ret;
-}
-EXPORT_SYMBOL_GPL(i915_gpu_busy);
-
-/**
- * i915_gpu_turbo_disable - disable graphics turbo
- *
- * Disable graphics turbo by resetting the max frequency and setting the
- * current frequency to the default.
- */
-bool i915_gpu_turbo_disable(void)
-{
-	struct drm_i915_private *i915;
-	bool ret;
-
-	i915 = mchdev_get();
-	if (!i915)
-		return false;
-
-	spin_lock_irq(&mchdev_lock);
-	i915->ips.max_delay = i915->ips.fstart;
-	ret = ironlake_set_drps(i915, i915->ips.fstart);
-	spin_unlock_irq(&mchdev_lock);
-
-	drm_dev_put(&i915->drm);
-	return ret;
-}
-EXPORT_SYMBOL_GPL(i915_gpu_turbo_disable);
-
-/**
- * Tells the intel_ips driver that the i915 driver is now loaded, if
- * IPS got loaded first.
- *
- * This awkward dance is so that neither module has to depend on the
- * other in order for IPS to do the appropriate communication of
- * GPU turbo limits to i915.
- */
-static void
-ips_ping_for_i915_load(void)
-{
-	void (*link)(void);
-
-	link = symbol_get(ips_link_to_i915_driver);
-	if (link) {
-		link();
-		symbol_put(ips_link_to_i915_driver);
-	}
-}
-
-void intel_gpu_ips_init(struct drm_i915_private *dev_priv)
-{
-	/* We only register the i915 ips part with intel-ips once everything is
-	 * set up, to avoid intel-ips sneaking in and reading bogus values. */
-	smp_store_mb(i915_mch_dev, dev_priv);
-
-	ips_ping_for_i915_load();
-}
-
-void intel_gpu_ips_teardown(void)
-{
-	smp_store_mb(i915_mch_dev, NULL);
-}
-
-static void intel_init_emon(struct drm_i915_private *dev_priv)
-{
-	u32 lcfuse;
-	u8 pxw[16];
-	int i;
-
-	/* Disable to program */
-	I915_WRITE(ECR, 0);
-	POSTING_READ(ECR);
-
-	/* Program energy weights for various events */
-	I915_WRITE(SDEW, 0x15040d00);
-	I915_WRITE(CSIEW0, 0x007f0000);
-	I915_WRITE(CSIEW1, 0x1e220004);
-	I915_WRITE(CSIEW2, 0x04000004);
-
-	for (i = 0; i < 5; i++)
-		I915_WRITE(PEW(i), 0);
-	for (i = 0; i < 3; i++)
-		I915_WRITE(DEW(i), 0);
-
-	/* Program P-state weights to account for frequency power adjustment */
-	for (i = 0; i < 16; i++) {
-		u32 pxvidfreq = I915_READ(PXVFREQ(i));
-		unsigned long freq = intel_pxfreq(pxvidfreq);
-		unsigned long vid = (pxvidfreq & PXVFREQ_PX_MASK) >>
-			PXVFREQ_PX_SHIFT;
-		unsigned long val;
-
-		val = vid * vid;
-		val *= (freq / 1000);
-		val *= 255;
-		val /= (127*127*900);
-		if (val > 0xff)
-			DRM_ERROR("bad pxval: %ld\n", val);
-		pxw[i] = val;
-	}
-	/* Render standby states get 0 weight */
-	pxw[14] = 0;
-	pxw[15] = 0;
-
-	for (i = 0; i < 4; i++) {
-		u32 val = (pxw[i*4] << 24) | (pxw[(i*4)+1] << 16) |
-			(pxw[(i*4)+2] << 8) | (pxw[(i*4)+3]);
-		I915_WRITE(PXW(i), val);
-	}
-
-	/* Adjust magic regs to magic values (more experimental results) */
-	I915_WRITE(OGW0, 0);
-	I915_WRITE(OGW1, 0);
-	I915_WRITE(EG0, 0x00007f00);
-	I915_WRITE(EG1, 0x0000000e);
-	I915_WRITE(EG2, 0x000e0000);
-	I915_WRITE(EG3, 0x68000300);
-	I915_WRITE(EG4, 0x42000000);
-	I915_WRITE(EG5, 0x00140031);
-	I915_WRITE(EG6, 0);
-	I915_WRITE(EG7, 0);
-
-	for (i = 0; i < 8; i++)
-		I915_WRITE(PXWL(i), 0);
-
-	/* Enable PMON + select events */
-	I915_WRITE(ECR, 0x80000019);
-
-	lcfuse = I915_READ(LCFUSE02);
-
-	dev_priv->ips.corr = (lcfuse & LCFUSE_HIV_MASK);
-}
-
-void intel_init_gt_powersave(struct drm_i915_private *dev_priv)
-{
-	struct intel_rps *rps = &dev_priv->gt_pm.rps;
-
-	/*
-	 * RPM depends on RC6 to save restore the GT HW context, so make RC6 a
-	 * requirement.
-	 */
-	if (!sanitize_rc6(dev_priv)) {
-		DRM_INFO("RC6 disabled, disabling runtime PM support\n");
-		intel_runtime_pm_get(dev_priv);
-	}
-
-	mutex_lock(&dev_priv->pcu_lock);
-
-	/* Initialize RPS limits (for userspace) */
-	if (IS_CHERRYVIEW(dev_priv))
-		cherryview_init_gt_powersave(dev_priv);
-	else if (IS_VALLEYVIEW(dev_priv))
-		valleyview_init_gt_powersave(dev_priv);
-	else if (INTEL_GEN(dev_priv) >= 6)
-		gen6_init_rps_frequencies(dev_priv);
-
-	/* Derive initial user preferences/limits from the hardware limits */
-	rps->idle_freq = rps->min_freq;
-	rps->cur_freq = rps->idle_freq;
-
-	rps->max_freq_softlimit = rps->max_freq;
-	rps->min_freq_softlimit = rps->min_freq;
-
-	if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
-		rps->min_freq_softlimit =
-			max_t(int,
-			      rps->efficient_freq,
-			      intel_freq_opcode(dev_priv, 450));
-
-	/* After setting max-softlimit, find the overclock max freq */
-	if (IS_GEN6(dev_priv) ||
-	    IS_IVYBRIDGE(dev_priv) || IS_HASWELL(dev_priv)) {
-		u32 params = 0;
-
-		sandybridge_pcode_read(dev_priv, GEN6_READ_OC_PARAMS, &params);
-		if (params & BIT(31)) { /* OC supported */
-			DRM_DEBUG_DRIVER("Overclocking supported, max: %dMHz, overclock: %dMHz\n",
-					 (rps->max_freq & 0xff) * 50,
-					 (params & 0xff) * 50);
-			rps->max_freq = params & 0xff;
-		}
-	}
-
-	/* Finally allow us to boost to max by default */
-	rps->boost_freq = rps->max_freq;
-
-	mutex_unlock(&dev_priv->pcu_lock);
-}
-
-void intel_cleanup_gt_powersave(struct drm_i915_private *dev_priv)
-{
-	if (IS_VALLEYVIEW(dev_priv))
-		valleyview_cleanup_gt_powersave(dev_priv);
-
-	if (!HAS_RC6(dev_priv))
-		intel_runtime_pm_put(dev_priv);
-}
-
-/**
- * intel_suspend_gt_powersave - suspend PM work and helper threads
- * @dev_priv: i915 device
- *
- * We don't want to disable RC6 or other features here, we just want
- * to make sure any work we've queued has finished and won't bother
- * us while we're suspended.
- */
-void intel_suspend_gt_powersave(struct drm_i915_private *dev_priv)
-{
-	if (INTEL_GEN(dev_priv) < 6)
-		return;
-
-	/* gen6_rps_idle() will be called later to disable interrupts */
-}
-
-void intel_sanitize_gt_powersave(struct drm_i915_private *dev_priv)
-{
-	dev_priv->gt_pm.rps.enabled = true; /* force RPS disabling */
-	dev_priv->gt_pm.rc6.enabled = true; /* force RC6 disabling */
-	intel_disable_gt_powersave(dev_priv);
-
-	gen6_reset_rps_interrupts(dev_priv);
-}
-
-static inline void intel_disable_llc_pstate(struct drm_i915_private *i915)
-{
-	lockdep_assert_held(&i915->pcu_lock);
-
-	if (!i915->gt_pm.llc_pstate.enabled)
-		return;
-
-	/* Currently there is no HW configuration to be done to disable. */
-
-	i915->gt_pm.llc_pstate.enabled = false;
-}
-
-static void intel_disable_rc6(struct drm_i915_private *dev_priv)
-{
-	lockdep_assert_held(&dev_priv->pcu_lock);
-
-	if (!dev_priv->gt_pm.rc6.enabled)
-		return;
-
-	if (INTEL_GEN(dev_priv) >= 9)
-		gen9_disable_rc6(dev_priv);
-	else if (IS_CHERRYVIEW(dev_priv))
-		cherryview_disable_rc6(dev_priv);
-	else if (IS_VALLEYVIEW(dev_priv))
-		valleyview_disable_rc6(dev_priv);
-	else if (INTEL_GEN(dev_priv) >= 6)
-		gen6_disable_rc6(dev_priv);
-
-	dev_priv->gt_pm.rc6.enabled = false;
-}
-
-static void intel_disable_rps(struct drm_i915_private *dev_priv)
-{
-	lockdep_assert_held(&dev_priv->pcu_lock);
-
-	if (!dev_priv->gt_pm.rps.enabled)
-		return;
-
-	if (INTEL_GEN(dev_priv) >= 9)
-		gen9_disable_rps(dev_priv);
-	else if (IS_CHERRYVIEW(dev_priv))
-		cherryview_disable_rps(dev_priv);
-	else if (IS_VALLEYVIEW(dev_priv))
-		valleyview_disable_rps(dev_priv);
-	else if (INTEL_GEN(dev_priv) >= 6)
-		gen6_disable_rps(dev_priv);
-	else if (IS_IRONLAKE_M(dev_priv))
-		ironlake_disable_drps(dev_priv);
-
-	dev_priv->gt_pm.rps.enabled = false;
-}
-
-void intel_disable_gt_powersave(struct drm_i915_private *dev_priv)
-{
-	mutex_lock(&dev_priv->pcu_lock);
-
-	intel_disable_rc6(dev_priv);
-	intel_disable_rps(dev_priv);
-	if (HAS_LLC(dev_priv))
-		intel_disable_llc_pstate(dev_priv);
-
-	mutex_unlock(&dev_priv->pcu_lock);
-}
-
-static inline void intel_enable_llc_pstate(struct drm_i915_private *i915)
-{
-	lockdep_assert_held(&i915->pcu_lock);
-
-	if (i915->gt_pm.llc_pstate.enabled)
-		return;
-
-	gen6_update_ring_freq(i915);
-
-	i915->gt_pm.llc_pstate.enabled = true;
-}
-
-static void intel_enable_rc6(struct drm_i915_private *dev_priv)
-{
-	lockdep_assert_held(&dev_priv->pcu_lock);
-
-	if (dev_priv->gt_pm.rc6.enabled)
-		return;
-
-	if (IS_CHERRYVIEW(dev_priv))
-		cherryview_enable_rc6(dev_priv);
-	else if (IS_VALLEYVIEW(dev_priv))
-		valleyview_enable_rc6(dev_priv);
-	else if (INTEL_GEN(dev_priv) >= 9)
-		gen9_enable_rc6(dev_priv);
-	else if (IS_BROADWELL(dev_priv))
-		gen8_enable_rc6(dev_priv);
-	else if (INTEL_GEN(dev_priv) >= 6)
-		gen6_enable_rc6(dev_priv);
-
-	dev_priv->gt_pm.rc6.enabled = true;
-}
-
-static void intel_enable_rps(struct drm_i915_private *dev_priv)
-{
-	struct intel_rps *rps = &dev_priv->gt_pm.rps;
-
-	lockdep_assert_held(&dev_priv->pcu_lock);
-
-	if (rps->enabled)
-		return;
-
-	if (IS_CHERRYVIEW(dev_priv)) {
-		cherryview_enable_rps(dev_priv);
-	} else if (IS_VALLEYVIEW(dev_priv)) {
-		valleyview_enable_rps(dev_priv);
-	} else if (INTEL_GEN(dev_priv) >= 9) {
-		gen9_enable_rps(dev_priv);
-	} else if (IS_BROADWELL(dev_priv)) {
-		gen8_enable_rps(dev_priv);
-	} else if (INTEL_GEN(dev_priv) >= 6) {
-		gen6_enable_rps(dev_priv);
-	} else if (IS_IRONLAKE_M(dev_priv)) {
-		ironlake_enable_drps(dev_priv);
-		intel_init_emon(dev_priv);
-	}
-
-	WARN_ON(rps->max_freq < rps->min_freq);
-	WARN_ON(rps->idle_freq > rps->max_freq);
-
-	WARN_ON(rps->efficient_freq < rps->min_freq);
-	WARN_ON(rps->efficient_freq > rps->max_freq);
-
-	rps->enabled = true;
-}
-
-void intel_enable_gt_powersave(struct drm_i915_private *dev_priv)
-{
-	/* Powersaving is controlled by the host when inside a VM */
-	if (intel_vgpu_active(dev_priv))
-		return;
-
-	mutex_lock(&dev_priv->pcu_lock);
-
-	if (HAS_RC6(dev_priv))
-		intel_enable_rc6(dev_priv);
-	intel_enable_rps(dev_priv);
-	if (HAS_LLC(dev_priv))
-		intel_enable_llc_pstate(dev_priv);
-
-	mutex_unlock(&dev_priv->pcu_lock);
-}
-
-static void ibx_init_clock_gating(struct drm_i915_private *dev_priv)
-{
-	/*
-	 * On Ibex Peak and Cougar Point, we need to disable clock
-	 * gating for the panel power sequencer or it will fail to
-	 * start up when no ports are active.
-	 */
-	I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE);
-}
-
-static void g4x_disable_trickle_feed(struct drm_i915_private *dev_priv)
-{
-	enum pipe pipe;
-
-	for_each_pipe(dev_priv, pipe) {
-		I915_WRITE(DSPCNTR(pipe),
-			   I915_READ(DSPCNTR(pipe)) |
-			   DISPPLANE_TRICKLE_FEED_DISABLE);
-
-		I915_WRITE(DSPSURF(pipe), I915_READ(DSPSURF(pipe)));
-		POSTING_READ(DSPSURF(pipe));
-	}
-}
-
-static void ilk_init_clock_gating(struct drm_i915_private *dev_priv)
-{
-	uint32_t dspclk_gate = ILK_VRHUNIT_CLOCK_GATE_DISABLE;
-
-	/*
-	 * Required for FBC
-	 * WaFbcDisableDpfcClockGating:ilk
-	 */
-	dspclk_gate |= ILK_DPFCRUNIT_CLOCK_GATE_DISABLE |
-		   ILK_DPFCUNIT_CLOCK_GATE_DISABLE |
-		   ILK_DPFDUNIT_CLOCK_GATE_ENABLE;
-
-	I915_WRITE(PCH_3DCGDIS0,
-		   MARIUNIT_CLOCK_GATE_DISABLE |
-		   SVSMUNIT_CLOCK_GATE_DISABLE);
-	I915_WRITE(PCH_3DCGDIS1,
-		   VFMUNIT_CLOCK_GATE_DISABLE);
-
-	/*
-	 * According to the spec the following bits should be set in
-	 * order to enable memory self-refresh
-	 * The bit 22/21 of 0x42004
-	 * The bit 5 of 0x42020
-	 * The bit 15 of 0x45000
-	 */
-	I915_WRITE(ILK_DISPLAY_CHICKEN2,
-		   (I915_READ(ILK_DISPLAY_CHICKEN2) |
-		    ILK_DPARB_GATE | ILK_VSDPFD_FULL));
-	dspclk_gate |= ILK_DPARBUNIT_CLOCK_GATE_ENABLE;
-	I915_WRITE(DISP_ARB_CTL,
-		   (I915_READ(DISP_ARB_CTL) |
-		    DISP_FBC_WM_DIS));
-
-	/*
-	 * Based on the document from hardware guys the following bits
-	 * should be set unconditionally in order to enable FBC.
-	 * The bit 22 of 0x42000
-	 * The bit 22 of 0x42004
-	 * The bit 7,8,9 of 0x42020.
-	 */
-	if (IS_IRONLAKE_M(dev_priv)) {
-		/* WaFbcAsynchFlipDisableFbcQueue:ilk */
-		I915_WRITE(ILK_DISPLAY_CHICKEN1,
-			   I915_READ(ILK_DISPLAY_CHICKEN1) |
-			   ILK_FBCQ_DIS);
-		I915_WRITE(ILK_DISPLAY_CHICKEN2,
-			   I915_READ(ILK_DISPLAY_CHICKEN2) |
-			   ILK_DPARB_GATE);
-	}
-
-	I915_WRITE(ILK_DSPCLK_GATE_D, dspclk_gate);
-
-	I915_WRITE(ILK_DISPLAY_CHICKEN2,
-		   I915_READ(ILK_DISPLAY_CHICKEN2) |
-		   ILK_ELPIN_409_SELECT);
-	I915_WRITE(_3D_CHICKEN2,
-		   _3D_CHICKEN2_WM_READ_PIPELINED << 16 |
-		   _3D_CHICKEN2_WM_READ_PIPELINED);
-
-	/* WaDisableRenderCachePipelinedFlush:ilk */
-	I915_WRITE(CACHE_MODE_0,
-		   _MASKED_BIT_ENABLE(CM0_PIPELINED_RENDER_FLUSH_DISABLE));
-
-	/* WaDisable_RenderCache_OperationalFlush:ilk */
-	I915_WRITE(CACHE_MODE_0, _MASKED_BIT_DISABLE(RC_OP_FLUSH_ENABLE));
-
-	g4x_disable_trickle_feed(dev_priv);
-
-	ibx_init_clock_gating(dev_priv);
-}
-
-static void cpt_init_clock_gating(struct drm_i915_private *dev_priv)
-{
-	int pipe;
-	uint32_t val;
-
-	/*
-	 * On Ibex Peak and Cougar Point, we need to disable clock
-	 * gating for the panel power sequencer or it will fail to
-	 * start up when no ports are active.
-	 */
-	I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE |
-		   PCH_DPLUNIT_CLOCK_GATE_DISABLE |
-		   PCH_CPUNIT_CLOCK_GATE_DISABLE);
-	I915_WRITE(SOUTH_CHICKEN2, I915_READ(SOUTH_CHICKEN2) |
-		   DPLS_EDP_PPS_FIX_DIS);
-	/* The below fixes the weird display corruption, a few pixels shifted
-	 * downward, on (only) LVDS of some HP laptops with IVY.
-	 */
-	for_each_pipe(dev_priv, pipe) {
-		val = I915_READ(TRANS_CHICKEN2(pipe));
-		val |= TRANS_CHICKEN2_TIMING_OVERRIDE;
-		val &= ~TRANS_CHICKEN2_FDI_POLARITY_REVERSED;
-		if (dev_priv->vbt.fdi_rx_polarity_inverted)
-			val |= TRANS_CHICKEN2_FDI_POLARITY_REVERSED;
-		val &= ~TRANS_CHICKEN2_FRAME_START_DELAY_MASK;
-		val &= ~TRANS_CHICKEN2_DISABLE_DEEP_COLOR_COUNTER;
-		val &= ~TRANS_CHICKEN2_DISABLE_DEEP_COLOR_MODESWITCH;
-		I915_WRITE(TRANS_CHICKEN2(pipe), val);
-	}
-	/* WADP0ClockGatingDisable */
-	for_each_pipe(dev_priv, pipe) {
-		I915_WRITE(TRANS_CHICKEN1(pipe),
-			   TRANS_CHICKEN1_DP0UNIT_GC_DISABLE);
-	}
-}
-
-static void gen6_check_mch_setup(struct drm_i915_private *dev_priv)
-{
-	uint32_t tmp;
-
-	tmp = I915_READ(MCH_SSKPD);
-	if ((tmp & MCH_SSKPD_WM0_MASK) != MCH_SSKPD_WM0_VAL)
-		DRM_DEBUG_KMS("Wrong MCH_SSKPD value: 0x%08x This can cause underruns.\n",
-			      tmp);
-}
-
-static void gen6_init_clock_gating(struct drm_i915_private *dev_priv)
-{
-	uint32_t dspclk_gate = ILK_VRHUNIT_CLOCK_GATE_DISABLE;
-
-	I915_WRITE(ILK_DSPCLK_GATE_D, dspclk_gate);
-
-	I915_WRITE(ILK_DISPLAY_CHICKEN2,
-		   I915_READ(ILK_DISPLAY_CHICKEN2) |
-		   ILK_ELPIN_409_SELECT);
-
-	/* WaDisableHiZPlanesWhenMSAAEnabled:snb */
-	I915_WRITE(_3D_CHICKEN,
-		   _MASKED_BIT_ENABLE(_3D_CHICKEN_HIZ_PLANE_DISABLE_MSAA_4X_SNB));
-
-	/* WaDisable_RenderCache_OperationalFlush:snb */
-	I915_WRITE(CACHE_MODE_0, _MASKED_BIT_DISABLE(RC_OP_FLUSH_ENABLE));
-
-	/*
-	 * BSpec recoomends 8x4 when MSAA is used,
-	 * however in practice 16x4 seems fastest.
-	 *
-	 * Note that PS/WM thread counts depend on the WIZ hashing
-	 * disable bit, which we don't touch here, but it's good
-	 * to keep in mind (see 3DSTATE_PS and 3DSTATE_WM).
-	 */
-	I915_WRITE(GEN6_GT_MODE,
-		   _MASKED_FIELD(GEN6_WIZ_HASHING_MASK, GEN6_WIZ_HASHING_16x4));
-
-	I915_WRITE(CACHE_MODE_0,
-		   _MASKED_BIT_DISABLE(CM0_STC_EVICT_DISABLE_LRA_SNB));
-
-	I915_WRITE(GEN6_UCGCTL1,
-		   I915_READ(GEN6_UCGCTL1) |
-		   GEN6_BLBUNIT_CLOCK_GATE_DISABLE |
-		   GEN6_CSUNIT_CLOCK_GATE_DISABLE);
-
-	/* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock
-	 * gating disable must be set.  Failure to set it results in
-	 * flickering pixels due to Z write ordering failures after
-	 * some amount of runtime in the Mesa "fire" demo, and Unigine
-	 * Sanctuary and Tropics, and apparently anything else with
-	 * alpha test or pixel discard.
-	 *
-	 * According to the spec, bit 11 (RCCUNIT) must also be set,
-	 * but we didn't debug actual testcases to find it out.
-	 *
-	 * WaDisableRCCUnitClockGating:snb
-	 * WaDisableRCPBUnitClockGating:snb
-	 */
-	I915_WRITE(GEN6_UCGCTL2,
-		   GEN6_RCPBUNIT_CLOCK_GATE_DISABLE |
-		   GEN6_RCCUNIT_CLOCK_GATE_DISABLE);
-
-	/* WaStripsFansDisableFastClipPerformanceFix:snb */
-	I915_WRITE(_3D_CHICKEN3,
-		   _MASKED_BIT_ENABLE(_3D_CHICKEN3_SF_DISABLE_FASTCLIP_CULL));
-
-	/*
-	 * Bspec says:
-	 * "This bit must be set if 3DSTATE_CLIP clip mode is set to normal and
-	 * 3DSTATE_SF number of SF output attributes is more than 16."
-	 */
-	I915_WRITE(_3D_CHICKEN3,
-		   _MASKED_BIT_ENABLE(_3D_CHICKEN3_SF_DISABLE_PIPELINED_ATTR_FETCH));
-
-	/*
-	 * According to the spec the following bits should be
-	 * set in order to enable memory self-refresh and fbc:
-	 * The bit21 and bit22 of 0x42000
-	 * The bit21 and bit22 of 0x42004
-	 * The bit5 and bit7 of 0x42020
-	 * The bit14 of 0x70180
-	 * The bit14 of 0x71180
-	 *
-	 * WaFbcAsynchFlipDisableFbcQueue:snb
-	 */
-	I915_WRITE(ILK_DISPLAY_CHICKEN1,
-		   I915_READ(ILK_DISPLAY_CHICKEN1) |
-		   ILK_FBCQ_DIS | ILK_PABSTRETCH_DIS);
-	I915_WRITE(ILK_DISPLAY_CHICKEN2,
-		   I915_READ(ILK_DISPLAY_CHICKEN2) |
-		   ILK_DPARB_GATE | ILK_VSDPFD_FULL);
-	I915_WRITE(ILK_DSPCLK_GATE_D,
-		   I915_READ(ILK_DSPCLK_GATE_D) |
-		   ILK_DPARBUNIT_CLOCK_GATE_ENABLE  |
-		   ILK_DPFDUNIT_CLOCK_GATE_ENABLE);
-
-	g4x_disable_trickle_feed(dev_priv);
-
-	cpt_init_clock_gating(dev_priv);
-
-	gen6_check_mch_setup(dev_priv);
-}
-
-static void gen7_setup_fixed_func_scheduler(struct drm_i915_private *dev_priv)
-{
-	uint32_t reg = I915_READ(GEN7_FF_THREAD_MODE);
-
-	/*
-	 * WaVSThreadDispatchOverride:ivb,vlv
-	 *
-	 * This actually overrides the dispatch
-	 * mode for all thread types.
-	 */
-	reg &= ~GEN7_FF_SCHED_MASK;
-	reg |= GEN7_FF_TS_SCHED_HW;
-	reg |= GEN7_FF_VS_SCHED_HW;
-	reg |= GEN7_FF_DS_SCHED_HW;
-
-	I915_WRITE(GEN7_FF_THREAD_MODE, reg);
-}
-
-static void lpt_init_clock_gating(struct drm_i915_private *dev_priv)
-{
-	/*
-	 * TODO: this bit should only be enabled when really needed, then
-	 * disabled when not needed anymore in order to save power.
-	 */
-	if (HAS_PCH_LPT_LP(dev_priv))
-		I915_WRITE(SOUTH_DSPCLK_GATE_D,
-			   I915_READ(SOUTH_DSPCLK_GATE_D) |
-			   PCH_LP_PARTITION_LEVEL_DISABLE);
+	if (HAS_PCH_LPT_LP(dev_priv))
+		I915_WRITE(SOUTH_DSPCLK_GATE_D,
+			   I915_READ(SOUTH_DSPCLK_GATE_D) |
+			   PCH_LP_PARTITION_LEVEL_DISABLE);
 
 	/* WADPOClockGatingDisable:hsw */
 	I915_WRITE(TRANS_CHICKEN1(PIPE_A),
@@ -9268,69 +7026,6 @@ int skl_pcode_request(struct drm_i915_private *dev_priv, u32 mbox, u32 request,
 #undef COND
 }
 
-static int byt_gpu_freq(struct drm_i915_private *dev_priv, int val)
-{
-	struct intel_rps *rps = &dev_priv->gt_pm.rps;
-
-	/*
-	 * N = val - 0xb7
-	 * Slow = Fast = GPLL ref * N
-	 */
-	return DIV_ROUND_CLOSEST(rps->gpll_ref_freq * (val - 0xb7), 1000);
-}
-
-static int byt_freq_opcode(struct drm_i915_private *dev_priv, int val)
-{
-	struct intel_rps *rps = &dev_priv->gt_pm.rps;
-
-	return DIV_ROUND_CLOSEST(1000 * val, rps->gpll_ref_freq) + 0xb7;
-}
-
-static int chv_gpu_freq(struct drm_i915_private *dev_priv, int val)
-{
-	struct intel_rps *rps = &dev_priv->gt_pm.rps;
-
-	/*
-	 * N = val / 2
-	 * CU (slow) = CU2x (fast) / 2 = GPLL ref * N / 2
-	 */
-	return DIV_ROUND_CLOSEST(rps->gpll_ref_freq * val, 2 * 2 * 1000);
-}
-
-static int chv_freq_opcode(struct drm_i915_private *dev_priv, int val)
-{
-	struct intel_rps *rps = &dev_priv->gt_pm.rps;
-
-	/* CHV needs even values */
-	return DIV_ROUND_CLOSEST(2 * 1000 * val, rps->gpll_ref_freq) * 2;
-}
-
-int intel_gpu_freq(struct drm_i915_private *dev_priv, int val)
-{
-	if (INTEL_GEN(dev_priv) >= 9)
-		return DIV_ROUND_CLOSEST(val * GT_FREQUENCY_MULTIPLIER,
-					 GEN9_FREQ_SCALER);
-	else if (IS_CHERRYVIEW(dev_priv))
-		return chv_gpu_freq(dev_priv, val);
-	else if (IS_VALLEYVIEW(dev_priv))
-		return byt_gpu_freq(dev_priv, val);
-	else
-		return val * GT_FREQUENCY_MULTIPLIER;
-}
-
-int intel_freq_opcode(struct drm_i915_private *dev_priv, int val)
-{
-	if (INTEL_GEN(dev_priv) >= 9)
-		return DIV_ROUND_CLOSEST(val * GEN9_FREQ_SCALER,
-					 GT_FREQUENCY_MULTIPLIER);
-	else if (IS_CHERRYVIEW(dev_priv))
-		return chv_freq_opcode(dev_priv, val);
-	else if (IS_VALLEYVIEW(dev_priv))
-		return byt_freq_opcode(dev_priv, val);
-	else
-		return DIV_ROUND_CLOSEST(val, GT_FREQUENCY_MULTIPLIER);
-}
-
 void intel_pm_setup(struct drm_i915_private *dev_priv)
 {
 	mutex_init(&dev_priv->pcu_lock);
diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c
index 89547b614aa6..b0a8d1d9158e 100644
--- a/drivers/gpu/drm/i915/intel_uncore.c
+++ b/drivers/gpu/drm/i915/intel_uncore.c
@@ -565,8 +565,6 @@ void intel_uncore_runtime_resume(struct drm_i915_private *dev_priv)
 
 void intel_uncore_sanitize(struct drm_i915_private *dev_priv)
 {
-	/* BIOS often leaves RC6 enabled, but disable it for hw init */
-	intel_sanitize_gt_powersave(dev_priv);
 }
 
 static void __intel_uncore_forcewake_get(struct drm_i915_private *dev_priv,
-- 
2.15.1



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