diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_pm.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_pm.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 0edb549d143..647dfcc26c4 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -3549,6 +3549,20 @@ static void gen7_setup_fixed_func_scheduler(struct drm_i915_private *dev_priv) I915_WRITE(GEN7_FF_THREAD_MODE, reg); } +static void lpt_init_clock_gating(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + + /* + * TODO: this bit should only be enabled when really needed, then + * disabled when not needed anymore in order to save power. + */ + if (dev_priv->pch_id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE) + I915_WRITE(SOUTH_DSPCLK_GATE_D, + I915_READ(SOUTH_DSPCLK_GATE_D) | + PCH_LP_PARTITION_LEVEL_DISABLE); +} + static void haswell_init_clock_gating(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; @@ -3600,6 +3614,7 @@ static void haswell_init_clock_gating(struct drm_device *dev) WM_DBG_DISALLOW_SPRITE | WM_DBG_DISALLOW_MAXFIFO); + lpt_init_clock_gating(dev); } static void ivybridge_init_clock_gating(struct drm_device *dev) |