[Intel-gfx] Fwd: Re: Macbook Pro Retina display problems

[Bernhard Froemel]

Hello Daniel and Francois,

apologies for posting 'out of thread'.

> Can you please re-grab the
> dumps?
http://luna.vmars.tuwien.ac.at/~froemel/ird_noi915.txt
http://luna.vmars.tuwien.ac.at/~froemel/ird_i915.txt
http://luna.vmars.tuwien.ac.at/~froemel/ird_i915_pC.txt (short freeze,
screen looks for a second scaled to 2/3 (black border), same
corruption and then looks just like before)
Also, have you seen this post by 'gschwind':
http://ubuntuforums.org/showpost.php?p=12160766&postcount=70 ?

For convenience reasons the patch that is attached to the forum post:
--- linux-3.5.1.orig/drivers/gpu/drm/i915/intel_display.c	2012-08-09
17:23:56.000000000 +0200
+++ linux-3.5.1/drivers/gpu/drm/i915/intel_display.c	2012-08-09
21:13:43.146996673 +0200
@@ -3583,7 +3583,8 @@

 		if (intel_encoder->type == INTEL_OUTPUT_EDP) {
 			/* Use VBT settings if we have an eDP panel */
-			unsigned int edp_bpc = dev_priv->edp.bpp / 3;
+			//unsigned int edp_bpc = dev_priv->edp.bpp / 3;
+			unsigned int edp_bpc = 8;

 			if (edp_bpc < display_bpc) {
 				DRM_DEBUG_KMS("clamping display bpc (was %d) to eDP (%d)\n",
display_bpc, edp_bpc);

Cheers, Bernhard