Hi Andy Et al., On Mon, Aug 22, 2022 at 05:20:15PM +0200, Sascha Hauer wrote: > This series adds support for 4k@30 to the rockchip HDMI controller. This > has been tested on a rk3568 rock3a board. It should be possible to add > 4k@60 support the same way, but it doesn't work for me, so let's add > 4k@30 as a first step. I tried adding 4k@60 support the same way, just by adding the missing fields for 600MHz in the PLL/phy settings. I get a picture on the screen, but it's not very stable: The monitor often gets black, scans through the different HDMI inputs and then syncs again. Also when I re-plug the cable while weston is running I won't get any picture anymore (the same works fine with lower resolutions). I also tried the Rock3a 4.19 Kernel which is based on the Rockchip Kernel and I saw similar problems there. Do you have an idea what could go wrong there? Sascha -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
