[PATCH 12/30] drm/i915: Drop WaDisablePSDDualDispatchEnable:ivb for IVB GT2

ville.syrjala
2013-07-05T13:49:35Z

Both Bspec and the W/A database state that WaDisablePSDDualDispatchEnable
is only needed for IVB GT1.

The only real confusion here is that the the W/A database also says to
write to the GT2 only register as well, which is strange if the W/A is
only for GT1.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
drivers/gpu/drm/i915/intel_pm.c | 7 -------
1 file changed, 7 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 530eb6b..fe7f147 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -4754,13 +4754,6 @@ static void ivybridge_init_clock_gating(struct drm_device *dev)
if (IS_IVB_GT1(dev))
I915_WRITE(GEN7_HALF_SLICE_CHICKEN1,
_MASKED_BIT_ENABLE(GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE));
- else {
- /* must write both registers */
- I915_WRITE(GEN7_HALF_SLICE_CHICKEN1,
- _MASKED_BIT_ENABLE(GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE));
- I915_WRITE(GEN7_HALF_SLICE_CHICKEN1_GT2,
- _MASKED_BIT_ENABLE(GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE));
- }

/* Apply the WaDisableRHWOOptimizationForRenderHang:ivb workaround. */
I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1,