caea4f3848
When I connected my cubieboard running 4.15-rc1 to my 4k display I got no
picture. Some digging found that there is no check against the upper
pixelclock limit of the HDMI output, so X selects a 4kp60 format at 594
MHz, which obviously won't work.
The patch below adds a check for the upper bound of what this hardware can
do, and it checks if the requested tmds clock can be obtained.
It also allows for the +/- 0.5% pixel clock variation that the HDMI spec permits.
That code is based on commit
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| drm | ||
| host1x | ||
| ipu-v3 | ||
| vga | ||
| Makefile | ||