diff options
| -rw-r--r-- | drivers/gpu/drm/i915/intel_runtime_pm.c | 27 |
1 files changed, 25 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c index 5bd7f083aa34..39810844a9c9 100644 --- a/drivers/gpu/drm/i915/intel_runtime_pm.c +++ b/drivers/gpu/drm/i915/intel_runtime_pm.c @@ -498,12 +498,35 @@ static void gen9_disable_dc5(struct drm_i915_private *dev_priv) static void skl_enable_dc6(struct drm_i915_private *dev_priv) { - /* TODO: Implementation to be done. */ + struct drm_device *dev = dev_priv->dev; + uint32_t val; + + WARN_ON(!IS_SKYLAKE(dev)); + + DRM_DEBUG_KMS("Enabling DC6\n"); + + gen9_set_dc_state_debugmask_memory_up(dev_priv); + + val = I915_READ(DC_STATE_EN); + val &= ~DC_STATE_EN_UPTO_DC5_DC6_MASK; + val |= DC_STATE_EN_UPTO_DC6; + I915_WRITE(DC_STATE_EN, val); + POSTING_READ(DC_STATE_EN); } static void skl_disable_dc6(struct drm_i915_private *dev_priv) { - /* TODO: Implementation to be done. */ + struct drm_device *dev = dev_priv->dev; + uint32_t val; + + WARN_ON(!IS_SKYLAKE(dev)); + + DRM_DEBUG_KMS("Disabling DC6\n"); + + val = I915_READ(DC_STATE_EN); + val &= ~DC_STATE_EN_UPTO_DC6; + I915_WRITE(DC_STATE_EN, val); + POSTING_READ(DC_STATE_EN); } static void skl_set_power_well(struct drm_i915_private *dev_priv, |