Hi, On Sun, Jul 19, 2026 at 7:54 PM dioyc_zhang <[email protected]> wrote: > > From: Dio Zhang <[email protected]> > > Screen garbage or flickering can be observed during mode changes(such > as VT switches) on systems using the AUO B116XAK01.6 and B140XTK02.4 > panels. > > This occurs because the backlight is enabled before the video signal > stabilizes. Waveform measurements show that the panel signal takes > around 140ms to stabilize after a mode change, meaning the previous 50ms T8 > timing was insufficient. > > To resolve this issue, adjust the eDP panel delay entry from > delay_200_500_e50 to delay_200_500_e200 (increasing T8 from 50ms to 200ms). > This matches the updated panel specifications from AUO, which now formally > define T8 as 200ms to mask any display abnormalities during mode changes. > > Signed-off-by: Dio Zhang <[email protected]> > --- > drivers/gpu/drm/panel/panel-edp.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-)
A few notes: * Your email client is still slightly misconfigured in regards to real name. As you can see, when I quoted your message above it still says "On Sun, Jul 19, 2026 at 7:54 PM dioyc_zhang <..." instead of "On Sun, Jul 19, 2026 at 7:54 PM Dio Zhang <...". In any case, at least the patch authorship and Signed-off-by look fine. Just something to try to improve for the next patch. ;-) * The patch doesn't apply cleanly to drm-misc-next. Presumbly you sent it based on an older tree. Ideally, send patches against drm-misc-next for panel-edp. I've fixed it up this time, but it's an extra step for me. * Subject line only referenced one of the two panels. I've fixed this up for you. Reviewed-by: Douglas Anderson <[email protected]> Pushed to drm-misc-next: [1/1] drm/panel: panel-edp: Adjust T8 timing for AUO B116XAK01.6 and B140XTK02.4 commit: 0d40cab39158704e372240ed9821a00bfe117125 -Doug
