Commit c8a75348 authored Jul 01, 2020 by Ondrej Jirman Committed by Sam Ravnborg Jul 01, 2020

drm/panel: st7703: Assert reset prior to powering down the regulators



The reset pin is inverted, so if we don't assert reset, the actual gpio
will be high and may keep driving the IO port of the panel.

Signed-off-by: Ondrej Jirman <megous@megous.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Guido Günther <agx@sigxcpu.org>
Reviewed-by: Guido Günther <agx@sigxcpu.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200701162928.1638874-12-megous@megous.com

parent 43fc6db0

drivers/gpu/drm/panel/panel-sitronix-st7703.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -415,6 +415,7 @@ static int st7703_unprepare(struct drm_panel *panel)
		if (!ctx->prepared)
		return 0;

		gpiod_set_value_cansleep(ctx->reset_gpio, 1);
		regulator_disable(ctx->iovcc);
		regulator_disable(ctx->vcc);
		ctx->prepared = false;

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