[Intel-gfx] [PATCH 1/2] drm/i915: Document that we are implementing WaDisableBackToBackFlipFix

[Damien Lespiau]

From: Damien Lespiau <damien.lespiau at intel.com>

For the next person that checks these kind of things, without having to
dig up the register definition.

Signed-off-by: Damien Lespiau <damien.lespiau at intel.com>
---
 drivers/gpu/drm/i915/intel_pm.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 62fe848..3d219ec 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3541,6 +3541,7 @@ static void ivybridge_init_clock_gating(struct drm_device *dev)
 	I915_WRITE(_3D_CHICKEN3,
 		   _MASKED_BIT_ENABLE(_3D_CHICKEN_SF_DISABLE_OBJEND_CULL));
 
+	/* WaDisableBackToBackFlipFix */
 	I915_WRITE(IVB_CHICKEN3,
 		   CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE |
 		   CHICKEN3_DGMG_DONE_FIX_DISABLE);
@@ -3621,6 +3622,7 @@ static void valleyview_init_clock_gating(struct drm_device *dev)
 	I915_WRITE(_3D_CHICKEN3,
 		   _MASKED_BIT_ENABLE(_3D_CHICKEN_SF_DISABLE_OBJEND_CULL));
 
+	/* WaDisableBackToBackFlipFix */
 	I915_WRITE(IVB_CHICKEN3,
 		   CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE |
 		   CHICKEN3_DGMG_DONE_FIX_DISABLE);
-- 
1.7.7.5