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| author | Imre Deak <imre.deak@intel.com> | 2019-08-16 12:55:23 +0300 |
|---|---|---|
| committer | Imre Deak <imre.deak@intel.com> | 2019-08-20 16:17:55 +0300 |
| commit | 149d6deb880c3a9002161bb6f978bc81c7c1ca8e (patch) | |
| tree | 7b23223fb5075eb7f9fdb72d2e2a24095c70b8b0 /drivers/gpu/drm/i915/display/intel_display_power.c | |
| parent | 2969a78aead38b49e80c821a5c683544ab16160d (diff) | |
| download | lwn-149d6deb880c3a9002161bb6f978bc81c7c1ca8e.tar.gz lwn-149d6deb880c3a9002161bb6f978bc81c7c1ca8e.zip | |
drm/i915: Sanitize PHY state during display core uninit
To work around a DMC/Punit issue on ICL where the driver's
ICL_PORT_COMP_DW8/IREFGEN PHY setting is lost when entering/exiting DC6
state, make sure to reinit the PHY whenever disabling DC states.
Similarly the driver's PHY/DBUF/CDCLK settings should have been preserved
across DC5/6 transitions, so check this on all platforms.
This gets rid of the following WARN during suspend:
Combo PHY A HW state changed unexpectedly
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190816095523.15800-1-imre.deak@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_display_power.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_display_power.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c index 02f8c3911c59..376449022c60 100644 --- a/drivers/gpu/drm/i915/display/intel_display_power.c +++ b/drivers/gpu/drm/i915/display/intel_display_power.c @@ -963,8 +963,7 @@ static void gen9_assert_dbuf_enabled(struct drm_i915_private *dev_priv) "Unexpected DBuf power power state (0x%08x)\n", tmp); } -static void gen9_dc_off_power_well_enable(struct drm_i915_private *dev_priv, - struct i915_power_well *power_well) +static void gen9_disable_dc_states(struct drm_i915_private *dev_priv) { struct intel_cdclk_state cdclk_state = {}; @@ -988,6 +987,12 @@ static void gen9_dc_off_power_well_enable(struct drm_i915_private *dev_priv, intel_combo_phy_init(dev_priv); } +static void gen9_dc_off_power_well_enable(struct drm_i915_private *dev_priv, + struct i915_power_well *power_well) +{ + gen9_disable_dc_states(dev_priv); +} + static void gen9_dc_off_power_well_disable(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { @@ -4510,7 +4515,7 @@ static void skl_display_core_uninit(struct drm_i915_private *dev_priv) struct i915_power_domains *power_domains = &dev_priv->power_domains; struct i915_power_well *well; - gen9_set_dc_state(dev_priv, DC_STATE_DISABLE); + gen9_disable_dc_states(dev_priv); gen9_dbuf_disable(dev_priv); @@ -4571,7 +4576,7 @@ static void bxt_display_core_uninit(struct drm_i915_private *dev_priv) struct i915_power_domains *power_domains = &dev_priv->power_domains; struct i915_power_well *well; - gen9_set_dc_state(dev_priv, DC_STATE_DISABLE); + gen9_disable_dc_states(dev_priv); gen9_dbuf_disable(dev_priv); @@ -4631,7 +4636,7 @@ static void cnl_display_core_uninit(struct drm_i915_private *dev_priv) struct i915_power_domains *power_domains = &dev_priv->power_domains; struct i915_power_well *well; - gen9_set_dc_state(dev_priv, DC_STATE_DISABLE); + gen9_disable_dc_states(dev_priv); /* 1. Disable all display engine functions -> aready done */ @@ -4698,7 +4703,7 @@ static void icl_display_core_uninit(struct drm_i915_private *dev_priv) struct i915_power_domains *power_domains = &dev_priv->power_domains; struct i915_power_well *well; - gen9_set_dc_state(dev_priv, DC_STATE_DISABLE); + gen9_disable_dc_states(dev_priv); /* 1. Disable all display engine functions -> aready done */ |