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drm/i915/bdw: Implement Wa4x4STCOptimizationDisable:bdw

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Not implementing this W/A can lead to hangs.

Cc: Ben Widawsky <benjamin.widawsky@intel.com>
Cc: Rafael Barbalho <rafael.barbalho@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Cc: stable@vger.kernel.org
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Damien Lespiau
2014-03-26 18:41:51 +00:00
committed by Daniel Vetter
parent e568af1c62
commit 5d708680ea
2 changed files with 6 additions and 1 deletions
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4
drivers/gpu/drm/i915/intel_pm.c
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@@ -4882,6 +4882,10 @@ static void gen8_init_clock_gating(struct drm_device *dev)
/* WaDisableSDEUnitClockGating:bdw */
I915_WRITE(GEN8_UCGCTL6, I915_READ(GEN8_UCGCTL6) |
GEN8_SDEUNIT_CLOCK_GATE_DISABLE);
/* Wa4x4STCOptimizationDisable:bdw */
I915_WRITE(CACHE_MODE_1,
_MASKED_BIT_ENABLE(GEN8_4x4_STC_OPTIMIZATION_DISABLE));
}
static void haswell_init_clock_gating(struct drm_device *dev)