drm/panel: Allow powering on panel follower after panel is enabled

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[ Upstream commit 2eb22214c1 ]

Some touch controllers have to be powered on after the panel's backlight
is enabled. To support these controllers, introduce .panel_enabled() and
.panel_disabling() to panel_follower_funcs and use them to power on the
device after the panel and its backlight are enabled.

Signed-off-by: Pin-yen Lin <treapking@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20250818115015.2909525-1-treapking@chromium.org
Stable-dep-of: cbdd16b818 ("HID: i2c-hid: Make elan touch controllers power on after panel is enabled")
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Pin-yen Lin 2025-08-18 19:49:33 +08:00 • committed by Greg Kroah-Hartman

parent 9f427da8f8

commit 2ca40698d2

2 changed files with 76 additions and 11 deletions

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73

drivers/gpu/drm/drm_panel.c

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14

include/drm/drm_panel.h

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