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authorAdam Jackson <ajax@redhat.com>2011-12-13 15:41:00 -0800
committerKeith Packard <keithp@keithp.com>2011-12-16 08:49:59 -0800
commit3b5c78a35cf7511c15e09a9b0ffab290a42d9bcf (patch)
tree1ac33469f850f6c84df493974cf6034991dcd0c1 /include
parentf45b55575cedb7efa782e43f1ea74338456d0381 (diff)
drm/i915/dp: Dither down to 6bpc if it makes the mode fit
Some active adaptors (VGA usually) only have two lanes at 2.7GHz. That's a maximum pixel clock of 144MHz at 8bpc, but 192MHz at 6bpc. Fixes Asus UX31 panel being black at startup due to no valid modes since dc22ee6fc18ce0f15424e753e8473c306ece95c1. v2: Rebased to current code, resulting in the fix applying to EDP panels as well. Also changed from spatio-temporal to just spatial dithering on pre-ironlake, to be conssitent (and less visual flicker) Signed-off-by: Adam Jackson <ajax@redhat.com> Signed-off-by: Eric Anholt <eric@anholt.net> Tested-by: Eric Anholt <eric@anholt.net> Tested-by: Dirk Hohndel <hohndel@infradead.org> Signed-off-by: Keith Packard <keithp@keithp.com>
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