diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_runtime_pm.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_runtime_pm.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c index fefe22c3c163..dc74f38d945f 100644 --- a/drivers/gpu/drm/i915/intel_runtime_pm.c +++ b/drivers/gpu/drm/i915/intel_runtime_pm.c @@ -2176,6 +2176,28 @@ static void intel_power_domains_sync_hw(struct drm_i915_private *dev_priv) mutex_unlock(&power_domains->lock); } +static void gen9_dbuf_enable(struct drm_i915_private *dev_priv) +{ + I915_WRITE(DBUF_CTL, I915_READ(DBUF_CTL) | DBUF_POWER_REQUEST); + POSTING_READ(DBUF_CTL); + + udelay(10); + + if (!(I915_READ(DBUF_CTL) & DBUF_POWER_STATE)) + DRM_ERROR("DBuf power enable timeout\n"); +} + +static void gen9_dbuf_disable(struct drm_i915_private *dev_priv) +{ + I915_WRITE(DBUF_CTL, I915_READ(DBUF_CTL) & ~DBUF_POWER_REQUEST); + POSTING_READ(DBUF_CTL); + + udelay(10); + + if (I915_READ(DBUF_CTL) & DBUF_POWER_STATE) + DRM_ERROR("DBuf power disable timeout!\n"); +} + static void skl_display_core_init(struct drm_i915_private *dev_priv, bool resume) { @@ -2202,6 +2224,8 @@ static void skl_display_core_init(struct drm_i915_private *dev_priv, skl_init_cdclk(dev_priv); + gen9_dbuf_enable(dev_priv); + if (resume && dev_priv->csr.dmc_payload) intel_csr_load_program(dev_priv); } @@ -2213,6 +2237,8 @@ static void skl_display_core_uninit(struct drm_i915_private *dev_priv) gen9_set_dc_state(dev_priv, DC_STATE_DISABLE); + gen9_dbuf_disable(dev_priv); + skl_uninit_cdclk(dev_priv); /* The spec doesn't call for removing the reset handshake flag */ @@ -2257,6 +2283,9 @@ void bxt_display_core_init(struct drm_i915_private *dev_priv, mutex_unlock(&power_domains->lock); broxton_init_cdclk(dev_priv); + + gen9_dbuf_enable(dev_priv); + broxton_ddi_phy_init(dev_priv); broxton_cdclk_verify_state(dev_priv); @@ -2274,6 +2303,9 @@ void bxt_display_core_uninit(struct drm_i915_private *dev_priv) gen9_set_dc_state(dev_priv, DC_STATE_DISABLE); broxton_ddi_phy_uninit(dev_priv); + + gen9_dbuf_disable(dev_priv); + broxton_uninit_cdclk(dev_priv); /* The spec doesn't call for removing the reset handshake flag */ |