drm/i915: Disable 12bpc hdmi for now
It's totally broken, and since
commit d328c9d78d64ca11e744fe227096990430a88477
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Fri Apr 10 16:22:37 2015 +0200
drm/i915: Select starting pipe bpp irrespective or the primary plane
the kernel will try to use it even for the common rgb888 framebuffers.
Ville has patches to fix it all up properly, but unfortunately they're
stuck in review limbo. And since the 4.2 feature cutoff has passed we
need to somehow handle this regression.
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Paulo Zanoni <przanoni@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 4117092a..e97731a 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -1036,7 +1036,8 @@
*/
if (pipe_config->pipe_bpp > 8*3 && pipe_config->has_hdmi_sink &&
clock_12bpc <= portclock_limit &&
- hdmi_12bpc_possible(pipe_config)) {
+ hdmi_12bpc_possible(pipe_config) &&
+ 0 /* FIXME 12bpc support totally broken */) {
DRM_DEBUG_KMS("picking bpc to 12 for HDMI output\n");
desired_bpp = 12*3;