drm/panel: himax-hx83121a: add backlight regulator support

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The backlight, when managed by the panel controller, could be powered by
an external regulator, and shutting down the regulator could power off
the backlight.

Add support for such a regulator. It's powered off when the backlight is
0 (either by setting brightness to 0 or setting bl_power), and powered
on when the backlight should be operating.

Signed-off-by: Icenowy Zheng <zhengxingda@iscas.ac.cn>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patch.msgid.link/20260608162622.403713-3-zhengxingda@iscas.ac.cn

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Icenowy Zheng 2026-06-09 00:26:22 +08:00 • committed by Neil Armstrong

parent ae8dbbe895

commit 98b46e693b

1 changed files with 26 additions and 0 deletions

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drivers/gpu/drm/panel/panel-himax-hx83121a.c

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