drm/mediatek: Modify dpi power on/off sequence.

[ Upstream commit ff446c0 ]

Modify dpi power on/off sequence so that the first gpio operation will
take effect.

Fixes: 6bd4763 ("drm/mediatek: set dpi pin mode to gpio low to avoid leakage current")
Signed-off-by: Xinlei Lee <xinlei.lee@mediatek.com>
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drivers/gpu/drm/mediatek/mtk_dpi.c

@@ -387,9 +387,6 @@ static void mtk_dpi_power_off(struct mtk_dpi *dpi)
 	if (--dpi->refcount != 0)
 		return;
 
-	if (dpi->pinctrl && dpi->pins_gpio)
-		pinctrl_select_state(dpi->pinctrl, dpi->pins_gpio);
-
 	mtk_dpi_disable(dpi);
 	clk_disable_unprepare(dpi->pixel_clk);
 	clk_disable_unprepare(dpi->engine_clk);
@@ -414,9 +411,6 @@ static int mtk_dpi_power_on(struct mtk_dpi *dpi)
 		goto err_pixel;
 	}
 
-	if (dpi->pinctrl && dpi->pins_dpi)
-		pinctrl_select_state(dpi->pinctrl, dpi->pins_dpi);
-
 	return 0;
 
 err_pixel:
@@ -630,12 +624,18 @@ static void mtk_dpi_bridge_disable(struct drm_bridge *bridge)
 	struct mtk_dpi *dpi = bridge_to_dpi(bridge);
 
 	mtk_dpi_power_off(dpi);
+
+	if (dpi->pinctrl && dpi->pins_gpio)
+		pinctrl_select_state(dpi->pinctrl, dpi->pins_gpio);
 }
 
 static void mtk_dpi_bridge_enable(struct drm_bridge *bridge)
 {
 	struct mtk_dpi *dpi = bridge_to_dpi(bridge);
 
+	if (dpi->pinctrl && dpi->pins_dpi)
+		pinctrl_select_state(dpi->pinctrl, dpi->pins_dpi);
+
 	mtk_dpi_power_on(dpi);
 	mtk_dpi_set_display_mode(dpi, &dpi->mode);
 	mtk_dpi_enable(dpi);