V2: edit the commit message to contain more info The W/A spreadsheet says this is still required, but the b-spec says it's not for BYT-T. So the documentation is not clear. However, our experience with the other SKUs of BYT-I/M on Android and Linux suggests that setting this bit actually causes GPU hang for certain OGL benchmark applications. Removing this bit completely resolves the GPU hangs. --- drivers/gpu/drm/i915/intel_pm.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index a6b877a..3ba037e 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -5004,9 +5004,6 @@ static void valleyview_init_clock_gating(struct drm_device *dev) _MASKED_BIT_ENABLE(GEN7_MAX_PS_THREAD_DEP | GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE)); - /* WaDisableL3CacheAging:vlv */ - I915_WRITE(GEN7_L3CNTLREG1, I915_READ(GEN7_L3CNTLREG1) | GEN7_L3AGDIS); - /* WaForceL3Serialization:vlv */ I915_WRITE(GEN7_L3SQCREG4, I915_READ(GEN7_L3SQCREG4) & ~L3SQ_URB_READ_CAM_MATCH_DISABLE); -- 1.8.1.4 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
