Re: [PATCH] drm/amd/display: Reduce HDMI pixel encoding if max clock is exceeded

I just realized that at 4:2:2, the pixel clock isn't actually decreased to 3/4 of it's value at 4:4:4. I'll send a revised patch on Monday. On Fri, Nov 22, 2019 at 09:29:00PM -0800, Thomas Anderson wrote: > For high-res (8K) or HFR (4K120) displays, using uncompressed pixel > formats like YCbCr444

[PATCH] drm/amd/display: Reduce HDMI pixel encoding if max clock is exceeded

For high-res (8K) or HFR (4K120) displays, using uncompressed pixel formats like YCbCr444 would exceed the bandwidth of HDMI 2.0, so the "interesting" modes would be disabled, leaving only low-res or low framerate modes. This change lowers the pixel encoding to 4:2:2 or 4:2:0 if the max TMDS clock