diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_reg.h | 4 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_pm.c | 10 |
2 files changed, 14 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 20673cc450c..b7b2e63c14d 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -1272,6 +1272,10 @@ enum punit_power_well { #define INSTPM_TLB_INVALIDATE (1<<9) #define INSTPM_SYNC_FLUSH (1<<5) #define ACTHD 0x020c8 +#define MEM_MODE 0x020cc +#define MEM_DISPLAY_B_TRICKLE_FEED_DISABLE (1<<3) /* 830 only */ +#define MEM_DISPLAY_A_TRICKLE_FEED_DISABLE (1<<2) /* 830/845 only */ +#define MEM_DISPLAY_TRICKLE_FEED_DISABLE (1<<2) /* 85x only */ #define FW_BLC 0x020d8 #define FW_BLC2 0x020dc #define FW_BLC_SELF 0x020e0 /* 915+ only */ diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 38b61e4d17a..8541feb893f 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -6138,6 +6138,9 @@ static void gen3_init_clock_gating(struct drm_device *dev) /* On GEN3 we really need to make sure the ARB C3 LP bit is set */ I915_WRITE(MI_ARB_STATE, _MASKED_BIT_ENABLE(MI_ARB_C3_LP_WRITE_ENABLE)); + + I915_WRITE(MI_ARB_STATE, + _MASKED_BIT_ENABLE(MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE)); } static void i85x_init_clock_gating(struct drm_device *dev) @@ -6149,6 +6152,9 @@ static void i85x_init_clock_gating(struct drm_device *dev) /* interrupts should cause a wake up from C3 */ I915_WRITE(MI_STATE, _MASKED_BIT_ENABLE(MI_AGPBUSY_INT_EN) | _MASKED_BIT_DISABLE(MI_AGPBUSY_830_MODE)); + + I915_WRITE(MEM_MODE, + _MASKED_BIT_ENABLE(MEM_DISPLAY_TRICKLE_FEED_DISABLE)); } static void i830_init_clock_gating(struct drm_device *dev) @@ -6156,6 +6162,10 @@ static void i830_init_clock_gating(struct drm_device *dev) struct drm_i915_private *dev_priv = dev->dev_private; I915_WRITE(DSPCLK_GATE_D, OVRUNIT_CLOCK_GATE_DISABLE); + + I915_WRITE(MEM_MODE, + _MASKED_BIT_ENABLE(MEM_DISPLAY_A_TRICKLE_FEED_DISABLE) | + _MASKED_BIT_ENABLE(MEM_DISPLAY_B_TRICKLE_FEED_DISABLE)); } void intel_init_clock_gating(struct drm_device *dev) |