On 2020-09-22 21:31, Vicente Bergas wrote:
This patch series enable a QHD HDMI monitor to work at native resolution. Tested on a Sapphire board with RK3399 connected to a Q27q-10 monitor at 2560x1440@60
Indeed for RK3399 it also allows my 1920x1200 monitor (Dell U2415) to be driven at its native resolution with a 154MHz pixel clock. However, as predicted, it also breaks RK3328 for the same monitor - instead of rejecting the native mode and falling back to "standard" 1920x1080, it now tries to use it, which results in no signal and a spam of CRTC timeout warnings in dmesg :(
I'll try to test RK3288 as well soon - I tried hacking a specific entry for 154MHz into the tables a while ago, and while it worked perfectly on RK3399, RK3288 gave a fairly glitchy picture as if the clock signal was unstable or slightly out of spec. I'm interested to see if patch #1 makes any difference there.
Thanks, Robin.
Changes since v1: Use alternative clock rounding code proposed by Doug Anderson Vicente Bergas (3): drm: rockchip: hdmi: fix clock rounding code drm: rockchip: hdmi: allow any clock that is within the range drm: rockchip: hdmi: add higher pixel clock frequencies drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 8 +++++++- drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 7 ++----- 2 files changed, 9 insertions(+), 6 deletions(-)
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