[Intel-gfx] [PATCH] drm/i915: add dynamic performance control support for Ironlake
Jesse Barnes
jbarnes at virtuousgeek.org
Wed Jan 6 21:36:26 CET 2010
Ironlake (and 965GM, which this patch doesn't support) supports a
hardware performance and power management feature that allows it to
adjust to changes in GPU load over time with software help. The goal
if this is to maximize performance/power for a given workload.
This patch enables that feature, which is also a requirement for
supporting Intelligent Power Sharing, a feature which allows for
dynamic budgeting of power between the CPU and GPU in Arrandale
platforms.
This patch has only seen light testing, and since my Calpella system
just died (bricked it trying to do a BIOS upgrade) I'd like to get
Zhenyu's ack on it (preferably after some more testing) before it's
applied. I threw a few fairly light loads at it but didn't see any hw
change request interrupts, but I may not have been pushing it hard
enough.
Signed-off-by: Jesse Barnes <jbarnes at virtuousgeek.org>
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 463e8d0..a22c81d 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -386,6 +386,97 @@ out:
return 0;
}
+static int i915_rstdby_delays(struct seq_file *m, void *unused)
+{
+ struct drm_info_node *node = (struct drm_info_node *) m->private;
+ struct drm_device *dev = node->minor->dev;
+ drm_i915_private_t *dev_priv = dev->dev_private;
+ u16 crstanddelay = I915_READ16(CRSTANDVID);
+
+ seq_printf(m, "w/ctx: %d, w/o ctx: %d\n", (crstanddelay >> 8) & 0x3f, (crstanddelay & 0x3f));
+
+ return 0;
+}
+
+static int i915_cur_delayinfo(struct seq_file *m, void *unused)
+{
+ struct drm_info_node *node = (struct drm_info_node *) m->private;
+ struct drm_device *dev = node->minor->dev;
+ drm_i915_private_t *dev_priv = dev->dev_private;
+ u16 rgvswctl = I915_READ16(MEMSWCTL);
+
+ seq_printf(m, "Last command: 0x%01x\n", (rgvswctl >> 13) & 0x3);
+ seq_printf(m, "Command status: %d\n", (rgvswctl >> 12) & 1);
+ seq_printf(m, "P%d DELAY 0x%02x\n", (rgvswctl >> 8) & 0xf,
+ rgvswctl & 0x3f);
+
+ return 0;
+}
+
+static int i915_delayfreq_table(struct seq_file *m, void *unused)
+{
+ struct drm_info_node *node = (struct drm_info_node *) m->private;
+ struct drm_device *dev = node->minor->dev;
+ drm_i915_private_t *dev_priv = dev->dev_private;
+ u32 delayfreq;
+ int i;
+
+ for (i = 0; i < 16; i++) {
+ delayfreq = I915_READ(PXVFREQ_BASE + i * 4);
+ seq_printf(m, "P%02dVIDFREQ: 0x%08x\n", i, delayfreq);
+ }
+
+ return 0;
+}
+
+static inline int MAP_TO_MV(int map)
+{
+ return 1250 - (map * 25);
+}
+
+static int i915_inttoext_table(struct seq_file *m, void *unused)
+{
+ struct drm_info_node *node = (struct drm_info_node *) m->private;
+ struct drm_device *dev = node->minor->dev;
+ drm_i915_private_t *dev_priv = dev->dev_private;
+ u32 inttoext;
+ int i;
+
+ for (i = 1; i <= 32; i++) {
+ inttoext = I915_READ(INTTOEXT_BASE_ILK + i * 4);
+ seq_printf(m, "INTTOEXT%02d: 0x%08x\n", i, inttoext);
+ }
+
+ return 0;
+}
+
+static int i915_drpc_info(struct seq_file *m, void *unused)
+{
+ struct drm_info_node *node = (struct drm_info_node *) m->private;
+ struct drm_device *dev = node->minor->dev;
+ drm_i915_private_t *dev_priv = dev->dev_private;
+ u32 rgvmodectl = I915_READ(MEMMODECTL);
+
+ seq_printf(m, "HD boost: %s\n", (rgvmodectl & MEMMODE_BOOST_EN) ?
+ "yes" : "no");
+ seq_printf(m, "Boost freq: %d\n",
+ (rgvmodectl & MEMMODE_BOOST_FREQ_MASK) >>
+ MEMMODE_BOOST_FREQ_SHIFT);
+ seq_printf(m, "HW control enabled: %s\n",
+ rgvmodectl & MEMMODE_HWIDLE_EN ? "yes" : "no");
+ seq_printf(m, "SW control enabled: %s\n",
+ rgvmodectl & MEMMODE_SWMODE_EN ? "yes" : "no");
+ seq_printf(m, "Gated voltage change: %s\n",
+ rgvmodectl & MEMMODE_RCLK_GATE ? "yes" : "no");
+ seq_printf(m, "Starting frequency: P%d\n",
+ (rgvmodectl & MEMMODE_FSTART_MASK) >> MEMMODE_FSTART_SHIFT);
+ seq_printf(m, "Max frequency: P%d\n",
+ (rgvmodectl & MEMMODE_FMAX_MASK) >> MEMMODE_FMAX_SHIFT);
+ seq_printf(m, "Min frequency: P%d\n", (rgvmodectl & MEMMODE_FMIN_MASK));
+
+ return 0;
+}
+
static int i915_registers_info(struct seq_file *m, void *data) {
struct drm_info_node *node = (struct drm_info_node *) m->private;
struct drm_device *dev = node->minor->dev;
@@ -532,6 +623,11 @@ static struct drm_info_list i915_debugfs_list[] = {
{"i915_ringbuffer_info", i915_ringbuffer_info, 0},
{"i915_batchbuffers", i915_batchbuffer_info, 0},
{"i915_error_state", i915_error_state, 0},
+ {"i915_rstdby_delays", i915_rstdby_delays, 0},
+ {"i915_cur_delayinfo", i915_cur_delayinfo, 0},
+ {"i915_delayfreq_table", i915_delayfreq_table, 0},
+ {"i915_inttoext_table", i915_inttoext_table, 0},
+ {"i915_drpc_info", i915_drpc_info, 0},
};
#define I915_DEBUGFS_ENTRIES ARRAY_SIZE(i915_debugfs_list)
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index d67be65..f74c039 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -1339,6 +1339,9 @@ static void i915_get_mem_freq(struct drm_device *dev)
dev_priv->mem_freq = 800;
break;
}
+
+ DRM_DEBUG_DRIVER("detected %dMHz fsb frequency and %dMHz memory frequency\n",
+ dev_priv->fsb_freq, dev_priv->mem_freq);
}
/**
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 29dd676..2eae9ca 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -451,6 +451,7 @@ typedef struct drm_i915_private {
u32 savePIPEB_DATA_N1;
u32 savePIPEB_LINK_M1;
u32 savePIPEB_LINK_N1;
+ u32 saveRSTDBYCTL;
struct {
struct drm_mm gtt_space;
@@ -580,6 +581,9 @@ typedef struct drm_i915_private {
int child_dev_num;
struct child_device_config *child_dev;
struct drm_connector *int_lvds_connector;
+ u8 cur_delay;
+ u8 min_delay;
+ u8 max_delay;
} drm_i915_private_t;
/** driver private structure attached to each drm_gem_object */
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 7cd8110..f982b83 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -269,6 +269,55 @@ static void i915_hotplug_work_func(struct work_struct *work)
drm_sysfs_hotplug_event(dev);
}
+static void i915_handle_rps_change(struct drm_device *dev)
+{
+ drm_i915_private_t *dev_priv = dev->dev_private;
+ u32 slow_up, slow_down, max_avg, min_avg;
+ u16 rgvswctl;
+ u8 new_delay = dev_priv->cur_delay;
+
+ I915_WRITE(MEMINTRSTS, I915_READ(MEMINTRSTS) & ~MEMINT_EVAL_CHG);
+ slow_up = I915_READ(RCPREVBSYTUPAVG);
+ slow_down = I915_READ(RCPREVBSYTDNAVG);
+ max_avg = I915_READ(RCBMAXAVG);
+ min_avg = I915_READ(RCBMINAVG);
+
+ /* Handle RCS change request from hw */
+ if (slow_up > max_avg) {
+ if (dev_priv->cur_delay != dev_priv->max_delay)
+ new_delay = dev_priv->cur_delay - 1;
+ if (new_delay < dev_priv->max_delay)
+ new_delay = dev_priv->max_delay;
+ } else if (slow_down < min_avg) {
+ if (dev_priv->cur_delay != dev_priv->min_delay)
+ new_delay = dev_priv->cur_delay + 1;
+ if (new_delay > dev_priv->min_delay)
+ new_delay = dev_priv->min_delay;
+ }
+
+ DRM_DEBUG("rps change requested: %d -> %d\n",
+ dev_priv->cur_delay, new_delay);
+
+ rgvswctl = I915_READ(MEMSWCTL);
+ if (rgvswctl & MEMCTL_CMD_STS) {
+ DRM_ERROR("gpu slow, RCS change rejected\n");
+ return; /* still slow with another command */
+ }
+
+ /* Program the new state */
+ rgvswctl = (MEMCTL_CMD_CHFREQ << MEMCTL_CMD_SHIFT) |
+ (new_delay << MEMCTL_FREQ_SHIFT);
+ I915_WRITE(MEMSWCTL, rgvswctl);
+ rgvswctl |= MEMCTL_CMD_STS;
+ I915_WRITE(MEMSWCTL, rgvswctl);
+
+ dev_priv->cur_delay = new_delay;
+
+ DRM_DEBUG("rps changed\n");
+
+ return;
+}
+
irqreturn_t ironlake_irq_handler(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
@@ -326,6 +375,11 @@ irqreturn_t ironlake_irq_handler(struct drm_device *dev)
queue_work(dev_priv->wq, &dev_priv->hotplug_work);
}
+ if (de_iir & DE_PCU_EVENT) {
+ I915_WRITE(MEMINTRSTS, I915_READ(MEMINTRSTS));
+ i915_handle_rps_change(dev);
+ }
+
de_iir = new_de_iir;
gt_iir = new_gt_iir;
pch_iir = new_pch_iir;
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index f79b133..7a1757a 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -61,6 +61,7 @@
#define GC_CLOCK_100_200 (1 << 0)
#define GC_CLOCK_100_133 (2 << 0)
#define GC_CLOCK_166_250 (3 << 0)
+#define GCFGC2 0xda
#define GCFGC 0xf0 /* 915+ only */
#define GC_LOW_FREQUENCY_ENABLE (1 << 7)
#define GC_DISPLAY_CLOCK_190_200_MHZ (0 << 4)
@@ -282,7 +283,7 @@
#define I915_PIPE_CONTROL_NOTIFY_INTERRUPT (1<<18)
#define I915_DISPLAY_PORT_INTERRUPT (1<<17)
#define I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT (1<<15)
-#define I915_GMCH_THERMAL_SENSOR_EVENT_INTERRUPT (1<<14)
+#define I915_GMCH_THERMAL_SENSOR_EVENT_INTERRUPT (1<<14) /* p-state */
#define I915_HWB_OOM_INTERRUPT (1<<13)
#define I915_SYNC_STATUS_INTERRUPT (1<<12)
#define I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT (1<<11)
@@ -783,10 +784,152 @@
#define CLKCFG_MEM_800 (3 << 4)
#define CLKCFG_MEM_MASK (7 << 4)
-/** GM965 GM45 render standby register */
-#define MCHBAR_RENDER_STANDBY 0x111B8
+#define CRSTANDVID 0x11100
+#define PXVFREQ_BASE 0x11110 /* P[0-15]VIDFREQ (0x1114c) (ILK) */
+#define PXVFREQ_PX_MASK 0x7f000000
+#define PXVFREQ_PX_SHIFT 24
+#define VIDFREQ_BASE 0x11110
+#define VIDFREQ1 0x11110 /* VIDFREQ1-4 (0x1111c) (CTG) */
+#define VIDFREQ2 0x11114
+#define VIDFREQ3 0x11118
+#define VIDFREQ4 0x1111c
+#define VIDFREQ_P0_MASK 0x1f000000
+#define VIDFREQ_P0_SHIFT 24
+#define VIDFREQ_P0_CSCLK_MASK 0x00f00000
+#define VIDFREQ_P0_CSCLK_SHIFT 20
+#define VIDFREQ_P0_CRCLK_MASK 0x000f0000
+#define VIDFREQ_P0_CRCLK_SHIFT 16
+#define VIDFREQ_P1_MASK 0x00001f00
+#define VIDFREQ_P1_SHIFT 8
+#define VIDFREQ_P1_CSCLK_MASK 0x000000f0
+#define VIDFREQ_P1_CSCLK_SHIFT 4
+#define VIDFREQ_P1_CRCLK_MASK 0x0000000f
+#define INTTOEXT_BASE_ILK 0x11300
+#define INTTOEXT_BASE 0x11120 /* INTTOEXT1-8 (0x1113c) */
+#define INTTOEXT1 0X11120
+#define INTTOEXT2 0X11124
+#define INTTOEXT3 0X11128
+#define INTTOEXT4 0X1112c
+#define INTTOEXT5 0X11130
+#define INTTOEXT6 0X11134
+#define INTTOEXT7 0X11138
+#define INTTOEXT8 0X1113c
+#define INTTOEXT_MAP3_SHIFT 24
+#define INTTOEXT_MAP3_MASK (0x1f << INTTOEXT_MAP3_SHIFT)
+#define INTTOEXT_MAP2_SHIFT 16
+#define INTTOEXT_MAP2_MASK (0x1f << INTTOEXT_MAP2_SHIFT)
+#define INTTOEXT_MAP1_SHIFT 8
+#define INTTOEXT_MAP1_MASK (0x1f << INTTOEXT_MAP1_SHIFT)
+#define INTTOEXT_MAP0_SHIFT 0
+#define INTTOEXT_MAP0_MASK (0x1f << INTTOEXT_MAP0_SHIFT)
+#define MEMSWCTL 0x11170 /* Ironlake only */
+#define MEMCTL_CMD_MASK 0xe000
+#define MEMCTL_CMD_SHIFT 13
+#define MEMCTL_CMD_RCLK_OFF 0
+#define MEMCTL_CMD_RCLK_ON 1
+#define MEMCTL_CMD_CHFREQ 2
+#define MEMCTL_CMD_CHVID 3
+#define MEMCTL_CMD_VMMOFF 4
+#define MEMCTL_CMD_VMMON 5
+#define MEMCTL_CMD_STS (1<<12) /* write 1 triggers command, clears
+ when command complete */
+#define MEMCTL_FREQ_MASK 0x0f00 /* jitter, from 0-15 */
+#define MEMCTL_FREQ_SHIFT 8
+#define MEMCTL_SFCAVM (1<<7)
+#define MEMCTL_TGT_VID_MASK 0x007f
+#define MEMIHYST 0x1117c
+#define MEMINTREN 0x11180 /* 16 bits */
+#define MEMINT_RSEXIT_EN (1<<8)
+#define MEMINT_CX_SUPR_EN (1<<7)
+#define MEMINT_CONT_BUSY_EN (1<<6)
+#define MEMINT_AVG_BUSY_EN (1<<5)
+#define MEMINT_EVAL_CHG_EN (1<<4)
+#define MEMINT_MON_IDLE_EN (1<<3)
+#define MEMINT_UP_EVAL_EN (1<<2)
+#define MEMINT_DOWN_EVAL_EN (1<<1)
+#define MEMINT_SW_CMD_EN (1<<0)
+#define MEMINTRSTR 0x11182 /* 16 bits */
+#define MEM_RSEXIT_MASK 0xc000
+#define MEM_RSEXIT_SHIFT 14
+#define MEM_CONT_BUSY_MASK 0x3000
+#define MEM_CONT_BUSY_SHIFT 12
+#define MEM_AVG_BUSY_MASK 0x0c00
+#define MEM_AVG_BUSY_SHIFT 10
+#define MEM_EVAL_CHG_MASK 0x0300
+#define MEM_EVAL_BUSY_SHIFT 8
+#define MEM_MON_IDLE_MASK 0x00c0
+#define MEM_MON_IDLE_SHIFT 6
+#define MEM_UP_EVAL_MASK 0x0030
+#define MEM_UP_EVAL_SHIFT 4
+#define MEM_DOWN_EVAL_MASK 0x000c
+#define MEM_DOWN_EVAL_SHIFT 2
+#define MEM_SW_CMD_MASK 0x0003
+#define MEM_INT_STEER_GFX 0
+#define MEM_INT_STEER_CMR 1
+#define MEM_INT_STEER_SMI 2
+#define MEM_INT_STEER_SCI 3
+#define MEMINTRSTS 0x11184
+#define MEMINT_RSEXIT (1<<7)
+#define MEMINT_CONT_BUSY (1<<6)
+#define MEMINT_AVG_BUSY (1<<5)
+#define MEMINT_EVAL_CHG (1<<4)
+#define MEMINT_MON_IDLE (1<<3)
+#define MEMINT_UP_EVAL (1<<2)
+#define MEMINT_DOWN_EVAL (1<<1)
+#define MEMINT_SW_CMD (1<<0)
+#define MEMMODECTL 0x11190
+#define MEMMODE_BOOST_EN (1<<31)
+#define MEMMODE_BOOST_FREQ_MASK 0x0f000000 /* jitter for boost, 0-15 */
+#define MEMMODE_BOOST_FREQ_SHIFT 24
+#define MEMMODE_IDLE_MODE_MASK 0x00030000
+#define MEMMODE_IDLE_MODE_SHIFT 16
+#define MEMMODE_IDLE_MODE_EVAL 0
+#define MEMMODE_IDLE_MODE_CONT 1
+#define MEMMODE_HWIDLE_EN (1<<15)
+#define MEMMODE_SWMODE_EN (1<<14)
+#define MEMMODE_RCLK_GATE (1<<13)
+#define MEMMODE_HW_UPDATE (1<<12)
+#define MEMMODE_FSTART_MASK 0x00000f00 /* starting jitter, 0-15 */
+#define MEMMODE_FSTART_SHIFT 8
+#define MEMMODE_FMAX_MASK 0x000000f0 /* max jitter, 0-15 */
+#define MEMMODE_FMAX_SHIFT 4
+#define MEMMODE_FMIN_MASK 0x0000000f /* min jitter, 0-15 */
+#define RCBMAXAVG 0x1119c
+#define MEMSWCTL2 0x1119e /* Cantiga only */
+#define SWMEMCMD_RENDER_OFF (0 << 13)
+#define SWMEMCMD_RENDER_ON (1 << 13)
+#define SWMEMCMD_SWFREQ (2 << 13)
+#define SWMEMCMD_TARVID (3 << 13)
+#define SWMEMCMD_VRM_OFF (4 << 13)
+#define SWMEMCMD_VRM_ON (5 << 13)
+#define CMDSTS (1<<12)
+#define SFCAVM (1<<11)
+#define SWFREQ_MASK 0x0380 /* P0-7 */
+#define SWFREQ_SHIFT 7
+#define TARVID_MASK 0x001f
+#define MEMSTAT_CTG 0x111a0
+#define RCBMINAVG 0x111a0
+#define RCUPEI 0x111b0
+#define RCDNEI 0x111b4
+#define RSTDBYCTL 0x111b8
#define RCX_SW_EXIT (1<<23)
#define RSX_STATUS_MASK 0x00700000
+#define VIDCTL 0x111c0
+#define VIDSTS 0x111c8
+#define VIDSTART 0x111cc /* 8 bits */
+#define MEMSTAT_ILK 0x111f8
+#define MEMSTAT_VID_MASK 0x7f00
+#define MEMSTAT_VID_SHIFT 8
+#define MEMSTAT_PSTATE_MASK 0x00f8
+#define MEMSTAT_PSTATE_SHIFT 3
+#define MEMSTAT_MON_ACTV (1<<2)
+#define MEMSTAT_SRC_CTL_MASK 0x0003
+#define MEMSTAT_SRC_CTL_CORE 0
+#define MEMSTAT_SRC_CTL_TRB 1
+#define MEMSTAT_SRC_CTL_THM 2
+#define MEMSTAT_SRC_CTL_STDBY 3
+#define RCPREVBSYTUPAVG 0x113b8
+#define RCPREVBSYTDNAVG 0x113bc
#define PEG_BAND_GAP_DATA 0x14d68
/*
diff --git a/drivers/gpu/drm/i915/i915_suspend.c b/drivers/gpu/drm/i915/i915_suspend.c
index a3b90c9..2c34664 100644
--- a/drivers/gpu/drm/i915/i915_suspend.c
+++ b/drivers/gpu/drm/i915/i915_suspend.c
@@ -682,6 +682,7 @@ void i915_restore_display(struct drm_device *dev)
I915_WRITE(PCH_PP_OFF_DELAYS, dev_priv->savePP_OFF_DELAYS);
I915_WRITE(PCH_PP_DIVISOR, dev_priv->savePP_DIVISOR);
I915_WRITE(PCH_PP_CONTROL, dev_priv->savePP_CONTROL);
+ I915_WRITE(RSTDBYCTL, dev_priv->saveRSTDBYCTL);
} else {
I915_WRITE(PFIT_PGM_RATIOS, dev_priv->savePFIT_PGM_RATIOS);
I915_WRITE(BLC_PWM_CTL, dev_priv->saveBLC_PWM_CTL);
@@ -745,11 +746,15 @@ int i915_save_state(struct drm_device *dev)
dev_priv->saveGTIMR = I915_READ(GTIMR);
dev_priv->saveFDI_RXA_IMR = I915_READ(FDI_RXA_IMR);
dev_priv->saveFDI_RXB_IMR = I915_READ(FDI_RXB_IMR);
+ dev_priv->saveRSTDBYCTL = I915_READ(RSTDBYCTL);
} else {
dev_priv->saveIER = I915_READ(IER);
dev_priv->saveIMR = I915_READ(IMR);
}
+ if (IS_IRONLAKE_M(dev))
+ ironlake_disable_drps(dev);
+
/* Cache mode state */
dev_priv->saveCACHE_MODE_0 = I915_READ(CACHE_MODE_0);
@@ -820,6 +825,9 @@ int i915_restore_state(struct drm_device *dev)
/* Clock gating state */
intel_init_clock_gating(dev);
+ if (IS_IRONLAKE_M(dev))
+ ironlake_enable_drps(dev);
+
/* Cache mode state */
I915_WRITE (CACHE_MODE_0, dev_priv->saveCACHE_MODE_0 | 0xffff0000);
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 9187a17..dbe0e65 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4414,6 +4414,91 @@ static const struct drm_mode_config_funcs intel_mode_funcs = {
.fb_changed = intelfb_probe,
};
+void ironlake_enable_drps(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ u32 rgvmodectl = I915_READ(MEMMODECTL), rgvswctl;
+ u8 fmax, fmin, fstart, vstart;
+
+ /* 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_BASE + (fstart * 4)) & PXVFREQ_PX_MASK) >>
+ PXVFREQ_PX_SHIFT;
+ vstart = 127 - ((I915_READ(MEMSTAT_ILK) & MEMSTAT_VID_MASK) >>
+ MEMSTAT_VID_SHIFT);
+ vstart = 0x66;
+
+ dev_priv->max_delay = fmax;
+ dev_priv->min_delay = fmin;
+ dev_priv->cur_delay = fstart;
+
+ I915_WRITE(MEMINTREN, MEMINT_CX_SUPR_EN | MEMINT_EVAL_CHG_EN);
+
+ /*
+ * Clear & enable PCU event interrupts
+ */
+ I915_WRITE(DEIIR, DE_PCU_EVENT);
+ I915_WRITE(DEIER, I915_READ(DEIER) | DE_PCU_EVENT);
+ I915_WRITE(DEIMR, I915_READ(DEIMR) & ~DE_PCU_EVENT);
+
+ I915_WRITE(VIDSTART, vstart);
+ POSTING_READ(VIDSTART);
+
+ rgvmodectl |= MEMMODE_SWMODE_EN;
+ I915_WRITE(MEMMODECTL, rgvmodectl);
+
+ while (I915_READ(MEMSWCTL) & MEMCTL_CMD_STS)
+ ;
+ msleep(1);
+
+ rgvswctl = (MEMCTL_CMD_CHFREQ << MEMCTL_CMD_SHIFT) |
+ (fstart << MEMCTL_FREQ_SHIFT) | MEMCTL_SFCAVM;
+ I915_WRITE(MEMSWCTL, rgvswctl);
+ POSTING_READ(MEMSWCTL);
+
+ rgvswctl |= MEMCTL_CMD_STS;
+ I915_WRITE(MEMSWCTL, rgvswctl);
+}
+
+void ironlake_disable_drps(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ u32 rgvswctl;
+ u8 fstart;
+
+ /* 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 */
+ fstart = (I915_READ(MEMMODECTL) & MEMMODE_FSTART_MASK) >>
+ MEMMODE_FSTART_SHIFT;
+ rgvswctl = (MEMCTL_CMD_CHFREQ << MEMCTL_CMD_SHIFT) |
+ (fstart << MEMCTL_FREQ_SHIFT);
+ I915_WRITE(MEMSWCTL, rgvswctl);
+ msleep(1);
+ rgvswctl |= MEMCTL_CMD_STS;
+ I915_WRITE(MEMSWCTL, rgvswctl);
+ msleep(1);
+
+}
+
void intel_init_clock_gating(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
@@ -4496,8 +4581,7 @@ void intel_init_clock_gating(struct drm_device *dev)
}
I915_WRITE(PWRCTXA, obj_priv->gtt_offset | PWRCTX_EN);
- I915_WRITE(MCHBAR_RENDER_STANDBY,
- I915_READ(MCHBAR_RENDER_STANDBY) & ~RCX_SW_EXIT);
+ I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) & ~RCX_SW_EXIT);
}
out:
@@ -4576,8 +4660,10 @@ static void intel_init_display(struct drm_device *dev)
void intel_modeset_init(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
+ int clock, max_clock;
int num_pipe;
int i;
+ u16 gcfgc2;
drm_mode_config_init(dev);
@@ -4617,6 +4703,40 @@ void intel_modeset_init(struct drm_device *dev)
else if (IS_I9XX(dev) || IS_G4X(dev))
pci_read_config_word(dev->pdev, GCFGC, &dev_priv->orig_clock);
+ DRM_DEBUG_DRIVER("GCFGC: 0x%04x\n", dev_priv->orig_clock);
+ if ((dev_priv->orig_clock & 0xf) == 0)
+ clock = 167;
+ if ((dev_priv->orig_clock & 0xf) == 0)
+ clock = 200;
+ if ((dev_priv->orig_clock & 0xf) == 0)
+ clock = 250;
+ if ((dev_priv->orig_clock & 0xf) == 0)
+ clock = 333;
+ if ((dev_priv->orig_clock & 0xf) == 0)
+ clock = 400;
+ if ((dev_priv->orig_clock & 0xf) == 0)
+ clock = 500;
+ if ((dev_priv->orig_clock & 0xf) == 0)
+ clock = 667;
+
+ pci_read_config_word(dev->pdev, GCFGC2, &gcfgc2);
+ if ((gcfgc2 & 0xf) == 0)
+ max_clock = 167;
+ if ((gcfgc2 & 0xf) == 0)
+ max_clock = 200;
+ if ((gcfgc2 & 0xf) == 0)
+ max_clock = 250;
+ if ((gcfgc2 & 0xf) == 0)
+ max_clock = 333;
+ if ((gcfgc2 & 0xf) == 0)
+ max_clock = 400;
+ if ((gcfgc2 & 0xf) == 0)
+ max_clock = 500;
+ if ((gcfgc2 & 0xf) == 0)
+ max_clock = 667;
+
+ DRM_DEBUG_DRIVER("detected %dMHz render clock (max %dMHz)\n", clock, max_clock);
+
for (i = 0; i < num_pipe; i++) {
intel_crtc_init(dev, i);
}
@@ -4625,6 +4745,9 @@ void intel_modeset_init(struct drm_device *dev)
intel_init_clock_gating(dev);
+ if (IS_IRONLAKE_M(dev))
+ ironlake_enable_drps(dev);
+
INIT_WORK(&dev_priv->idle_work, intel_idle_update);
setup_timer(&dev_priv->idle_timer, intel_gpu_idle_timer,
(unsigned long)dev);
@@ -4672,6 +4795,9 @@ void intel_modeset_cleanup(struct drm_device *dev)
drm_gem_object_unreference(dev_priv->pwrctx);
}
+ if (IS_IRONLAKE_M(dev))
+ ironlake_disable_drps(dev);
+
mutex_unlock(&dev->struct_mutex);
drm_mode_config_cleanup(dev);
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index a51573d..3a467ca 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -209,6 +209,8 @@ extern void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
extern void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
u16 *blue, int regno);
extern void intel_init_clock_gating(struct drm_device *dev);
+extern void ironlake_enable_drps(struct drm_device *dev);
+extern void ironlake_disable_drps(struct drm_device *dev);
extern int intel_framebuffer_create(struct drm_device *dev,
struct drm_mode_fb_cmd *mode_cmd,
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