From: Jesse Barnes <jbarnes@virtuousgeek.org>
Date: Thu, 3 Dec 2009 17:52:43 +0000 (-0800)
Subject: drm/i915: warn if Pineview CxSR can't be enabled
X-Git-Tag: v2.6.33-rc2~19^2~29^2~3
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=85364905f9ae12d19cb34099257d493e5d9a0c4e;p=platform%2Fkernel%2Flinux-stable.git

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

If we don't detect a supported memory configuration, we can't enable
CxSR.  Warn the user in this case so they can file a bug.
---

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 22dcd08..6b9dd67 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4740,6 +4740,13 @@ 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)