From c8a753484066a6382d2539d3dca1428164a682bf Mon Sep 17 00:00:00 2001 From: Ondrej Jirman Date: Wed, 1 Jul 2020 18:29:26 +0200 Subject: [PATCH] drm/panel: st7703: Assert reset prior to powering down the regulators MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Reviewed-by: Linus Walleij Tested-by: Guido Günther Reviewed-by: Guido Günther Signed-off-by: Sam Ravnborg Link: https://patchwork.freedesktop.org/patch/msgid/20200701162928.1638874-12-megous@megous.com --- drivers/gpu/drm/panel/panel-sitronix-st7703.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/panel/panel-sitronix-st7703.c b/drivers/gpu/drm/panel/panel-sitronix-st7703.c index 7750179bca60..8996ced2b721 100644 --- a/drivers/gpu/drm/panel/panel-sitronix-st7703.c +++ b/drivers/gpu/drm/panel/panel-sitronix-st7703.c @@ -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;