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| author | Dio Zhang <dioyc_zhang@compal.corp-partner.google.com> | 2026-07-20 10:53:58 +0800 |
|---|---|---|
| committer | Douglas Anderson <dianders@chromium.org> | 2026-07-20 12:44:26 -0700 |
| commit | 0d40cab39158704e372240ed9821a00bfe117125 (patch) | |
| tree | 2156eebd026c43036c7b96d7dc1e584073502fd1 /tools/perf/scripts/python/bin/stackcollapse-record | |
| parent | 48dd37d1fef33fbf42f1d6887c61e242fd21d00d (diff) | |
drm/panel: panel-edp: Adjust T8 timing for AUO B116XAK01.6 and B140XTK02.4
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 <dioyc_zhang@compal.corp-partner.google.com>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://patch.msgid.link/20260720025358.2781136-1-dioyc_zhang@compal.corp-partner.google.com
Diffstat (limited to 'tools/perf/scripts/python/bin/stackcollapse-record')
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