[PATCH] drm/mediatek: dpi: fix NULL dereference in mtk_dpi_bridge_atomic_check

[Frank Wunderlich]

From: Frank Wunderlich <frank-w at public-files.de>

bridge->driver_private is not set (NULL) so use bridge_to_dpi(bridge)
like it's done in bridge_atomic_get_output_bus_fmts

Fixes: ec8747c52434 ("drm/mediatek: dpi: Add bus format negotiation")
Signed-off-by: Frank Wunderlich <frank-w at public-files.de>
---
 drivers/gpu/drm/mediatek/mtk_dpi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
index bced555648b0..a2eca1f66984 100644
--- a/drivers/gpu/drm/mediatek/mtk_dpi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
@@ -605,7 +605,7 @@ static int mtk_dpi_bridge_atomic_check(struct drm_bridge *bridge,
 				       struct drm_crtc_state *crtc_state,
 				       struct drm_connector_state *conn_state)
 {
-	struct mtk_dpi *dpi = bridge->driver_private;
+	struct mtk_dpi *dpi = bridge_to_dpi(bridge);
 	unsigned int out_bus_format;
 
 	out_bus_format = bridge_state->output_bus_cfg.format;
-- 
2.25.1