drm/i915: warn if Pineview CxSR can't be enabled

Commit Message

Jesse Barnes Dec. 3, 2009, 5:52 p.m. UTC

None

Patch

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 65b76ff..951b2e9 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4730,6 +4730,13 @@  void intel_modeset_init(struct drm_device *dev)
 		    (unsigned long)dev);
 
 	intel_setup_overlay(dev);
+
+	if (IS_IGD(dev) && !intel_get_cxsr_latency(IS_IGDG(dev),
+						   dev_priv->fsb_freq,
+						   dev_priv->mem_freq))
+		DRM_INFO("failed to find known CxSR latency "
+			 "(found fsb freq %d, mem freq %d), disabling CxSR\n",
+			 dev_priv->fsb_freq, dev_priv->mem_freq);
 }
 
 void intel_modeset_cleanup(struct drm_device *dev)