diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2016-11-28 19:37:11 +0200 |
|---|---|---|
| committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2016-12-05 16:23:27 +0200 |
| commit | 3d90e649fa3da5c6e5cb72700584689eb6260082 (patch) | |
| tree | 2a3d85109f005e85baaf47082d2ca3c5662258aa /drivers/gpu/drm/i915/intel_pm.c | |
| parent | 7c951c0025d10b1a568fd27754dc4b6384a50f2e (diff) | |
drm/i915: Protect cxsr state with wm_mutex
Let's protect the cxsr state with the wm_mutex, since it might
get poked from multiple places if there's a parallel plane update
happening with a pipe getting enable/disabled.
It's still pretty racy for the old platforms, but for vlv/chv it
should work, I think. If not, we'll improve it later anyway.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1480354637-14209-10-git-send-email-ville.syrjala@linux.intel.com
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_pm.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_pm.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 472315fd65a7..4a9e1f36d8ff 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -312,14 +312,13 @@ static void chv_set_memory_pm5(struct drm_i915_private *dev_priv, bool enable) #define FW_WM(value, plane) \ (((value) << DSPFW_ ## plane ## _SHIFT) & DSPFW_ ## plane ## _MASK) -void intel_set_memory_cxsr(struct drm_i915_private *dev_priv, bool enable) +static void _intel_set_memory_cxsr(struct drm_i915_private *dev_priv, bool enable) { u32 val; if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) { I915_WRITE(FW_BLC_SELF_VLV, enable ? FW_CSPWRDWNEN : 0); POSTING_READ(FW_BLC_SELF_VLV); - dev_priv->wm.vlv.cxsr = enable; } else if (IS_G4X(dev_priv) || IS_CRESTLINE(dev_priv)) { I915_WRITE(FW_BLC_SELF, enable ? FW_BLC_SELF_EN : 0); POSTING_READ(FW_BLC_SELF); @@ -350,6 +349,13 @@ void intel_set_memory_cxsr(struct drm_i915_private *dev_priv, bool enable) DRM_DEBUG_KMS("memory self-refresh is %s\n", enableddisabled(enable)); } +void intel_set_memory_cxsr(struct drm_i915_private *dev_priv, bool enable) +{ + mutex_lock(&dev_priv->wm.wm_mutex); + _intel_set_memory_cxsr(dev_priv, enable); + dev_priv->wm.vlv.cxsr = enable; + mutex_unlock(&dev_priv->wm.wm_mutex); +} /* * Latency for FIFO fetches is dependent on several factors: @@ -1322,7 +1328,7 @@ static void vlv_update_wm(struct intel_crtc *crtc) chv_set_memory_pm5(dev_priv, false); if (!wm.cxsr && dev_priv->wm.vlv.cxsr) - intel_set_memory_cxsr(dev_priv, false); + _intel_set_memory_cxsr(dev_priv, false); /* FIXME should be part of crtc atomic commit */ vlv_pipe_set_fifo_size(crtc); @@ -1336,7 +1342,7 @@ static void vlv_update_wm(struct intel_crtc *crtc) wm.sr.plane, wm.sr.cursor, wm.level, wm.cxsr); if (wm.cxsr && !dev_priv->wm.vlv.cxsr) - intel_set_memory_cxsr(dev_priv, true); + _intel_set_memory_cxsr(dev_priv, true); if (wm.level >= VLV_WM_LEVEL_PM5 && dev_priv->wm.vlv.level < VLV_WM_LEVEL_PM5) |