From: Ville Syrjälä Date: Mon, 28 Nov 2016 17:37:11 +0000 (+0200) Subject: drm/i915: Protect cxsr state with wm_mutex X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=3d90e649fa3da5c6e5cb72700584689eb6260082;p=linux-beck.git 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 Link: http://patchwork.freedesktop.org/patch/msgid/1480354637-14209-10-git-send-email-ville.syrjala@linux.intel.com Reviewed-by: Maarten Lankhorst --- diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 1f7d91af60cf..4c4882f91369 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -5023,7 +5023,6 @@ intel_pre_disable_primary_noatomic(struct drm_crtc *crtc) */ if (HAS_GMCH_DISPLAY(dev_priv)) { intel_set_memory_cxsr(dev_priv, false); - dev_priv->wm.vlv.cxsr = false; intel_wait_for_vblank(dev_priv, pipe); } } @@ -5102,7 +5101,6 @@ static void intel_pre_plane_update(struct intel_crtc_state *old_crtc_state) */ if (old_crtc_state->base.active) { intel_set_memory_cxsr(dev_priv, false); - dev_priv->wm.vlv.cxsr = false; intel_wait_for_vblank(dev_priv, crtc->pipe); } } 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)