From: Sagar Kamble <sagar.a.kamble@xxxxxxxxx> When RC6 along with Render power gating is enabled, GPU hang happens due to lack of synchronization between GTI and Render power gating. Change-Id: If1614206341eb52a21eadae8c5ebb2655029b50c Signed-off-by: Sagar Kamble <sagar.a.kamble@xxxxxxxxx> --- drivers/gpu/drm/i915/intel_pm.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 9975401..4dd8b41 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -4350,9 +4350,12 @@ static void gen9_enable_rc6(struct drm_device *dev) GEN6_RC_CTL_EI_MODE(1) | rc6_mask); - /* 3b: Enable Coarse Power Gating only when RC6 is enabled */ + /* + * 3b: Enable Coarse Power Gating only when RC6 is enabled. + * WaDisableRenderPowerGating:skl,bxt - Render PG need to be disabled with RC6. + */ I915_WRITE(GEN9_PG_ENABLE, (rc6_mask & GEN6_RC_CTL_RC6_ENABLE) ? - (GEN9_RENDER_PG_ENABLE | GEN9_MEDIA_PG_ENABLE) : 0); + GEN9_MEDIA_PG_ENABLE : 0); intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL); -- 1.8.5 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
