Our workaround list kindly lists that this new default value needs to
be updated in Bspec. Naturally, this did not happen.
Acked-by: Ben Widawsky <b...@bwidawsk.net>
Signed-Off-by: Daniel Vetter <daniel.vet...@ffwll.ch>
---
drivers/gpu/drm/i915/i915_reg.h | 1 +
drivers/gpu/drm/i915/intel_display.c | 4 ++++
2 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index cd2d2c7..0ff4456 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -576,6 +576,7 @@
#define CM0_MASK_SHIFT 16
#define CM0_IZ_OPT_DISABLE (1<<6)
#define CM0_ZR_OPT_DISABLE (1<<5)
+#define CM0_STC_EVICT_DISABLE_LRA_SNB (1<<5)
#define CM0_DEPTH_EVICT_DISABLE (1<<4)
#define CM0_COLOR_EVICT_DISABLE (1<<3)
#define CM0_DEPTH_WRITE_DISABLE (1<<1)
diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index 083c741..7d96f53 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -8556,6 +8556,10 @@ static void gen6_init_clock_gating(struct drm_device
*dev)
I915_WRITE(WM2_LP_ILK, 0);
I915_WRITE(WM1_LP_ILK, 0);
+ /* clear masked bit */
+ I915_WRITE(CACHE_MODE_0,
+ CM0_STC_EVICT_DISABLE_LRA_SNB << CM0_MASK_SHIFT);
+
I915_WRITE(GEN6_UCGCTL1,
I915_READ(GEN6_UCGCTL1) |
GEN6_BLBUNIT_CLOCK_GATE_DISABLE |
--
1.7.7.6
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