diff options
| author | Hans Verkuil <[email protected]> | 2017-12-15 16:21:50 +0100 |
|---|---|---|
| committer | Maxime Ripard <[email protected]> | 2017-12-15 22:24:03 +0100 |
| commit | caea4f384858ee7861367920df36995e7acfe160 (patch) | |
| tree | 65b7874cc1664af83df979e728ea7658dc9c8812 /include/linux/fpga/fpga-bridge.h | |
| parent | bd36d3bab2e3d08f80766c86487090dbceed4651 (diff) | |
drm/sun4i: validate modes for HDMI
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 22d0be2a557e ("drm: arcpgu: Allow some clock
deviation in crtc->mode_valid() callback") from Jose Abreu for drm/arc.
Signed-off-by: Hans Verkuil <[email protected]>
Thanks-to: Jose Abreu <[email protected]>
Signed-off-by: Maxime Ripard <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
Diffstat (limited to 'include/linux/fpga/fpga-bridge.h')
0 files changed, 0 insertions, 0 deletions