2016-12-29, 18:56
(2016-12-29, 17:02)fritsch Wrote: I don't know what happens internally as currently there is whole lot stuff hidden in the way linux kernel (intel) processes to the output. On userspace side we still compute 8 bit RGBA. But when in 1080p mode I can read my AVRs on screen display. But when being in 4k mode it needs to switch the resolution to render. So there might something going on internally - but nothing I do actively.
Ah - so the 586.61 figure isn't neccessarily the pixel rate (with HDMI 2.0 clock rates go a bit strange as you get more than one pixel per clock) - as Intel drivers 'get in the way'?
Is there any way in Intel drivers of switching between 4:2:0 8 bit and 4:2:0 10-12bit/4:2:2 8-12bit at 2160p50 or 59.94/60? There can't be RGB or YCbCr 4:4:4 output AIUI - as this isn't supported at 2160p50/59.94/60