drm/panel-edp: Add pre_unprepare delay

In eDP power-off timing specifications, T10 defines the minimum delay
required between the end of valid video data from the source and panel
power-down (main VDD off).

Currently, panel-edp only supports the 'disable' delay, which corresponds
to T9 (backlight off to end of video data) and runs in panel_edp_disable()
while video data is still active. For panels that require a delay after
video data has stopped before cutting power, this delay must occur in
panel_edp_unprepare() before turning off power rails.

Add a 'pre_unprepare' field to struct panel_delay to model T10-min, and
delay for this duration in panel_edp_unprepare() before calling
pm_runtime_put_sync_suspend().

Additionally, adjust the timing entry for TM156VDXP25 to use
delay_200_500_e80_pu100 (enable = 80ms, pre_unprepare = 100ms) to match
its panel specification, replacing the previous delay_200_500_e50_d100.

Fixes: b9e2d5cdaab0 ("drm/panel-edp: Support NV140FHM-N5B and TM156VDXP25")
Signed-off-by: Hsin-Te Yuan <yuanhsinte@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://patch.msgid.link/20260803-edp-v1-1-3e92dec1d56c@chromium.org

0 files changed, 0 insertions, 0 deletions