This adds two cache-related workarounds for Ivy Bridge which can lead to
3D ring hangs and corruptions.
Signed-off-by: Eugeni Dodonov <eugeni.dodo...@intel.com>
---
drivers/gpu/drm/i915/i915_reg.h | 7 +++++++
drivers/gpu/drm/i915/intel_display.c | 6 ++++++
2 files changed, 13 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 80fd6b5..92274b1 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -3028,6 +3028,13 @@
#define DISP_TILE_SURFACE_SWIZZLING (1<<13)
#define DISP_FBC_WM_DIS (1<<15)
+/* GEN7 chicken */
+#define GEN7_COMMON_SLICE_CHICKEN1 0x7010
+#define GEN7_WA_FOR_GEN7_L3_CONTROL 0x3C4FFF8C
+
+#define GEN7_L3_CHICKEN_MODE_REGISTER 0xB030
+#define GEN7_WA_L3_CHICKEN_MODE 0x20000000
+
/* PCH */
/* south display engine interrupt */
diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index 1defd42..eee0e75 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -8475,6 +8475,12 @@ static void ivybridge_init_clock_gating(struct
drm_device *dev)
CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE |
CHICKEN3_DGMG_DONE_FIX_DISABLE);
+ /* WaApplyL3ControlAndL3ChickenMode requires those two on Ivy Bridge */
+ I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1,
+ GEN7_WA_FOR_GEN7_L3_CONTROL);
+ I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER,
+ GEN7_WA_L3_CHICKEN_MODE);
+
for_each_pipe(pipe) {
I915_WRITE(DSPCNTR(pipe),
I915_READ(DSPCNTR(pipe)) |
--
1.7.8.4
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