| Message ID | 20220822152017.1523679-1-s.hauer@pengutronix.de (mailing list archive) |
|---|---|
| Headers | show |
| Series | drm/rockchip: dw_hdmi: Add 4k@30 support | expand |
Hi Sascha, Can you Cc: linux-rockchip list to get more feedback? On 8/22/22 17:20, 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. > > Sascha > > Sascha Hauer (2): > drm/rockchip: dw_hdmi: relax mode_valid hook > drm/rockchip: dw_hdmi: Add support for 4k@30 resolution Great stuff, thanks! On a Radxa ROCK3 Model A with a HP 27f 4k monitor Tested-by: Michael Riesch <michael.riesch@wolfvision.net> Best regards, Michael > > drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 10 +++++++++- > 1 file changed, 9 insertions(+), 1 deletion(-) >
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
On Wed, Aug 24, 2022 at 07:43:03AM +0200, Michael Riesch wrote: > Hi Sascha, > > Can you Cc: linux-rockchip list to get more feedback? Yes, will do that next time. > > On 8/22/22 17:20, 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. > > > > Sascha > > > > Sascha Hauer (2): > > drm/rockchip: dw_hdmi: relax mode_valid hook > > drm/rockchip: dw_hdmi: Add support for 4k@30 resolution > > Great stuff, thanks! > > On a Radxa ROCK3 Model A with a HP 27f 4k monitor > > Tested-by: Michael Riesch <michael.riesch@wolfvision.net> Thanks Sascha
Hi Sascha: On 8/24/22 15:07, Sascha Hauer wrote: > 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? 4K HDMI output from hdmi need very carefully tuning of HDMI PHY and PLL. I can make sure that HDMI 4K output on rk3399/rk3288/rk356x are work fine with our vendor kernel, but the upstream kernel is only can run at 1080p output, I have tested on rk3399 and rk3568-evb1[0] I am not familiar with hdmi tuning, so I am sorry i can't give detail idea about this issue, maybe a more carefully comparison with hdmi driver and pll configuration between upstream kernel and rockchip 4.19 kernel? I think you have rk356x evb board, do you have a detail test about 4K HDMI output with this board? If you have issue about 4k hdmi output on this board with rockchip 4.19 kernel, we can help to figure it out. Anyway, I loop Algea to the list, he is maintaining our hdmi development, but I am sorry to say that he is also very busy