On Wed, 2012-09-26 at 18:43 +0300, Jani Nikula wrote: > The dithering introduced in > > commit 3b5c78a35cf7511c15e09a9b0ffab290a42d9bcf > Author: Adam Jackson <[email protected]> > Date: Tue Dec 13 15:41:00 2011 -0800 > > drm/i915/dp: Dither down to 6bpc if it makes the mode fit > > stores the INTEL_MODE_DP_FORCE_6BPC flag in the private_flags of the > adjusted mode, while i9xx_crtc_mode_set() and ironlake_crtc_mode_set() use > the original mode, without the flag, so it would never have any > effect. However, the BPC was clamped by VBT settings, making things work by > coincidence, until that part was removed in > > commit 4344b813f105a19f793f1fd93ad775b784648b95 > Author: Daniel Vetter <[email protected]> > Date: Fri Aug 10 11:10:20 2012 +0200 > > Use adjusted_mode instead of mode when checking for > INTEL_MODE_DP_FORCE_6BPC to make the flag have effect. > > v2: Don't forget to fix this in i9xx_crtc_mode_set() also, pointed out by > Daniel both before and after sending the first patch.
Reviewed-by: Adam Jackson <[email protected]> - ajax
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