[Bug 59841] [IVB cpu eDP] panel is broken due to 657445fe86 (eDP bpp clamping)

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=59841

--- Comment #76 from jkp <jkp at iki.fi> ---
Wondering if the issue could be handled by fixing how intel_bios.c seems to get
the panel panel bpp value wrong, I added debug output to see panel_type. Can't
say that this is obviously wrong, don't know enough:

[drm:parse_edp], BDB panel type: 14 

--- intel_bios.c~    2013-09-01 20:17:51.619505432 +0300
+++ intel_bios.c    2013-09-01 21:24:44.404296932 +0300
@@ -506,7 +506,9 @@
         return;
     }

+    DRM_DEBUG_KMS("BDB panel type: %d \n", panel_type);
+
    switch ((edp->color_depth >> (panel_type * 2)) & 3) {
     case EDP_18BPP:
         dev_priv->vbt.edp_bpp = 18;
         break;

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