Merge tag 'drm-intel-fixes-2015-08-14' into drm-intel-next-fixes

Backmerge drm-intel-fixes because a bunch of atomic patch backporting
we had to do lead to horrible conflicts.

Conflicts:
	drivers/gpu/drm/drm_crtc.c
Just a bit of context conflict between -next and -fixes.
	drivers/gpu/drm/i915/intel_atomic.c
	drivers/gpu/drm/i915/intel_display.c
Atomic conflicts, always pick the code from -next.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>

drivers/gpu/drm/i915/intel_display.c

@@ -12187,7 +12187,9 @@ encoder_retry:
 		goto encoder_retry;
 	}
 
-	pipe_config->dither = pipe_config->pipe_bpp != base_bpp;
+	/* Dithering seems to not pass-through bits correctly when it should, so
+	 * only enable it on 6bpc panels. */
+	pipe_config->dither = pipe_config->pipe_bpp == 6*3;
 	DRM_DEBUG_KMS("plane bpp: %i, pipe bpp: %i, dithering: %i\n",
 		      base_bpp, pipe_config->pipe_bpp, pipe_config->dither);