From: Sagar Kamble <sagar.a.kam...@intel.com>
When RC6 along with Render power gating is enabled, GPU hang
happens due to lack of synchronization between GTI and Render
power gating.
v2: Updated commit message and WA name (Damien)
Change-Id: If1614206341eb52a21eadae8c5ebb2655029b50c
Reviewed-by: Damien Lespiau <damien.lesp...@intel.com>
Signed-off-by: Sagar Kamble <sagar.a.kam...@intel.com>
---
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@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/intel-gfx
