[PATCH 20/23] drm/i915/hsw: Add has_fuses power well attribute
Imre Deak
imre.deak at intel.com
Wed Jul 5 20:00:37 UTC 2017
The pattern of a power well backing a set of fuse and strap HW signals
that need to be waited upon during power well enabling is common to all
GEN9+ platforms. Adding support for this to the HSW power well enable
helper allows us to use the HSW/BDW power well code for GEN9+ as well in
a follow-up patch.
Signed-off-by: Imre Deak <imre.deak at intel.com>
---
drivers/gpu/drm/i915/gvt/display.c | 6 +++---
drivers/gpu/drm/i915/i915_drv.h | 1 +
drivers/gpu/drm/i915/i915_reg.h | 9 ++++++---
drivers/gpu/drm/i915/intel_runtime_pm.c | 34 ++++++++++++++++++++++++++-------
4 files changed, 37 insertions(+), 13 deletions(-)
diff --git a/drivers/gpu/drm/i915/gvt/display.c b/drivers/gpu/drm/i915/gvt/display.c
index 2deb05f..13599bb 100644
--- a/drivers/gpu/drm/i915/gvt/display.c
+++ b/drivers/gpu/drm/i915/gvt/display.c
@@ -178,9 +178,9 @@ static void emulate_monitor_status_change(struct intel_vgpu *vgpu)
SDE_PORTE_HOTPLUG_SPT);
vgpu_vreg(vgpu, SKL_FUSE_STATUS) |=
SKL_FUSE_DOWNLOAD_STATUS |
- SKL_FUSE_PG0_DIST_STATUS |
- SKL_FUSE_PG1_DIST_STATUS |
- SKL_FUSE_PG2_DIST_STATUS;
+ SKL_FUSE_PG_DIST_STATUS(0) |
+ SKL_FUSE_PG_DIST_STATUS(1) |
+ SKL_FUSE_PG_DIST_STATUS(2);
vgpu_vreg(vgpu, LCPLL1_CTL) |=
LCPLL_PLL_ENABLE |
LCPLL_PLL_LOCK;
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 5538fa4..7ff3322 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1394,6 +1394,7 @@ struct i915_power_well {
struct {
u32 pipe_mask;
bool has_vga:1;
+ bool has_fuses:1;
} hsw;
};
const struct i915_power_well_ops *ops;
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 272de86..1a23c7d 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -8024,9 +8024,12 @@ enum {
/* SKL Fuse Status */
#define SKL_FUSE_STATUS _MMIO(0x42000)
#define SKL_FUSE_DOWNLOAD_STATUS (1<<31)
-#define SKL_FUSE_PG0_DIST_STATUS (1<<27)
-#define SKL_FUSE_PG1_DIST_STATUS (1<<26)
-#define SKL_FUSE_PG2_DIST_STATUS (1<<25)
+#define SKL_FUSE_PG_DIST_STATUS(pg) (1 << (27 - (pg)))
+/*
+ * Power well ID to PG index. PG0 doesn't have a corresponding power well ID,
+ * since it's handled by the HW automatically.
+ */
+#define SKL_PW_TO_PG(pw) ((pw) - SKL_DISP_PW_1 + 1)
/* Per-pipe DDI Function Control */
#define _TRANS_DDI_FUNC_CTL_A 0x60400
diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c
index 9e1a0e8..a183b9c 100644
--- a/drivers/gpu/drm/i915/intel_runtime_pm.c
+++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
@@ -400,18 +400,38 @@ static void hsw_wait_for_power_well_disable(struct drm_i915_private *dev_priv,
!!(reqs & 1), !!(reqs & 2), !!(reqs & 4), !!(reqs & 8));
}
+static void gen9_wait_for_power_well_fuses(struct drm_i915_private *dev_priv,
+ int pg)
+{
+ /* Timeout 5us for PG#0, for other PGs 1us */
+ WARN_ON(intel_wait_for_register(dev_priv, SKL_FUSE_STATUS,
+ SKL_FUSE_PG_DIST_STATUS(pg),
+ SKL_FUSE_PG_DIST_STATUS(pg), 1));
+}
+
static void hsw_power_well_enable(struct drm_i915_private *dev_priv,
struct i915_power_well *power_well)
{
enum i915_power_well_id id = power_well->id;
+ bool wait_fuses = power_well->hsw.has_fuses;
+ int pg;
u32 val;
+ if (wait_fuses) {
+ pg = SKL_PW_TO_PG(id);
+ if (pg == 1)
+ gen9_wait_for_power_well_fuses(dev_priv, pg - 1);
+ }
+
val = I915_READ(HSW_PWR_WELL_DRIVER);
I915_WRITE(HSW_PWR_WELL_DRIVER, val | HSW_PWR_WELL_CTL_REQ(id));
DRM_DEBUG_KMS("Enabling power well\n");
hsw_wait_for_power_well_enable(dev_priv, power_well);
+ if (wait_fuses)
+ gen9_wait_for_power_well_fuses(dev_priv, pg);
+
hsw_power_well_post_enable(dev_priv, power_well->hsw.pipe_mask,
power_well->hsw.has_vga);
}
@@ -815,15 +835,15 @@ static void skl_set_power_well(struct drm_i915_private *dev_priv,
case SKL_DISP_PW_1:
if (intel_wait_for_register(dev_priv,
SKL_FUSE_STATUS,
- SKL_FUSE_PG0_DIST_STATUS,
- SKL_FUSE_PG0_DIST_STATUS,
+ SKL_FUSE_PG_DIST_STATUS(0),
+ SKL_FUSE_PG_DIST_STATUS(0),
1)) {
DRM_ERROR("PG0 not enabled\n");
return;
}
break;
case SKL_DISP_PW_2:
- if (!(fuse_status & SKL_FUSE_PG1_DIST_STATUS)) {
+ if (!(fuse_status & SKL_FUSE_PG_DIST_STATUS(1))) {
DRM_ERROR("PG1 in disabled state\n");
return;
}
@@ -868,15 +888,15 @@ static void skl_set_power_well(struct drm_i915_private *dev_priv,
if (power_well->id == SKL_DISP_PW_1) {
if (intel_wait_for_register(dev_priv,
SKL_FUSE_STATUS,
- SKL_FUSE_PG1_DIST_STATUS,
- SKL_FUSE_PG1_DIST_STATUS,
+ SKL_FUSE_PG_DIST_STATUS(1),
+ SKL_FUSE_PG_DIST_STATUS(1),
1))
DRM_ERROR("PG1 distributing status timeout\n");
} else if (power_well->id == SKL_DISP_PW_2) {
if (intel_wait_for_register(dev_priv,
SKL_FUSE_STATUS,
- SKL_FUSE_PG2_DIST_STATUS,
- SKL_FUSE_PG2_DIST_STATUS,
+ SKL_FUSE_PG_DIST_STATUS(2),
+ SKL_FUSE_PG_DIST_STATUS(2),
1))
DRM_ERROR("PG2 distributing status timeout\n");
}
--
2.7.4
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