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drm/i915/bxt: add GEN8_SDEUNIT_CLOCK_GATE_DISABLE workaround 

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Nick Hoath <nicholas.hoath@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Imre Deak 2015-03-11 11:10:27 +02:00 committed by Daniel Vetter
parent a82abe43ce
commit 32608ca255
1 changed files with 11 additions and 0 deletions
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11
drivers/gpu/drm/i915/intel_pm.c
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@ -96,7 +96,18 @@ static void skl_init_clock_gating(struct drm_device *dev)
static void bxt_init_clock_gating(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
gen9_init_clock_gating(dev);
/*
* FIXME:
* GEN8_SDEUNIT_CLOCK_GATE_DISABLE applies on A0 only.
*/
/* WaDisableSDEUnitClockGating:bxt */
I915_WRITE(GEN8_UCGCTL6, I915_READ(GEN8_UCGCTL6) |
GEN8_SDEUNIT_CLOCK_GATE_DISABLE);
}
static void i915_pineview_get_mem_freq(struct drm_device *dev)