Workaround for dual port PS dispatch on GT1.
v2: pull in register definition & offset handling
v3: use IVB GT1 macro to get the right regs (Ben)
v4: add for VLV too (Ben)
v5: don't read the reg, it's masked so we'll only enable the one extra bit (Chris)
v6: use a _GT2 suffix for the second reg (Chris)
Signed-off-by: Jesse Barnes <jbarnes at virtuousgeek.org>
---
drivers/gpu/drm/i915/i915_drv.c | 1 +
drivers/gpu/drm/i915/i915_reg.h | 5 +++++
drivers/gpu/drm/i915/intel_pm.c | 11 +++++++++++
3 files changed, 17 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 39282a4..6f03b26 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -1131,6 +1131,7 @@ static bool IS_DISPLAYREG(u32 reg)
switch (reg) {
case GEN7_ROW_CHICKEN2:
+ case GEN7_HALF_SLICE_CHICKEN1:
return false;
default:
break;
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index ecb28be..34067b5 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -4268,6 +4268,11 @@
#define GEN7_L3LOG_BASE 0xB070
#define GEN7_L3LOG_SIZE 0x80
+#define GEN7_HALF_SLICE_CHICKEN1 0xe100 /* IVB GT1 + VLV */
+#define GEN7_HALF_SLICE_CHICKEN1_GT2 0xf100
+#define GEN7_MAX_PS_THREAD_DEP (8<<12)
+#define GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE (1<<3)
+
#define GEN7_ROW_CHICKEN2 0xe4f4
#define GEN7_ROW_CHICKEN2_GT2 0xf4f4
#define DOP_CLOCK_GATING_DISABLE (1<<0)
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 4c86549..0c1b270 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3527,6 +3527,14 @@ static void ivybridge_init_clock_gating(struct drm_device *dev)
CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE |
CHICKEN3_DGMG_DONE_FIX_DISABLE);
+ /* WaDisablePSDDualDispatchEnable */
+ if (IS_IVB_GT1(dev))
+ I915_WRITE(GEN7_HALF_SLICE_CHICKEN1,
+ _MASKED_BIT_ENABLE(GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE));
+ else
+ I915_WRITE(GEN7_HALF_SLICE_CHICKEN1_GT2,
+ _MASKED_BIT_ENABLE(GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE));
+
/* Apply the WaDisableRHWOOptimizationForRenderHang workaround. */
I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1,
GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC);
@@ -3615,6 +3623,9 @@ static void valleyview_init_clock_gating(struct drm_device *dev)
CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE |
CHICKEN3_DGMG_DONE_FIX_DISABLE);
+ I915_WRITE(GEN7_HALF_SLICE_CHICKEN1,
+ _MASKED_BIT_ENABLE(GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE));
+
/* Apply the WaDisableRHWOOptimizationForRenderHang workaround. */
I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1,
GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC);
--
1.7.9.5
