drm/mediatek: Fix warning about unhandled enum value

Fixes the following build warning:
drivers/gpu/drm/mediatek/mtk_hdmi.c:327:2: warning: enumeration value ‘HDMI_INFOFRAME_TYPE_DRM’ not handled in switch [-Wswitch]

Introduced with the addition of HDMI_INFOFRAME_TYPE_DRM in the commit
below, but the code really should have been future-proofed from the
start.

Fixes: 2cdbfd66a829 ("drm: Enable HDR infoframe support")
Cc: Uma Shankar <[email protected]>
Cc: Shashank Sharma <[email protected]>
Cc: Ville Syrjälä <[email protected]>
Cc: Maarten Lankhorst <[email protected]>
Cc: Maxime Ripard <[email protected]>
Cc: Sean Paul <[email protected]>
Cc: David Airlie <[email protected]>
Cc: Daniel Vetter <[email protected]>
Cc: Bartlomiej Zolnierkiewicz <[email protected]>
Cc: "Ville Syrjälä" <[email protected]>
Cc: Hans Verkuil <[email protected]>
Cc: [email protected]
Cc: [email protected]
Acked-by: CK Hu <[email protected]>
Signed-off-by: Sean Paul <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c
index e04e6c293d39..10cc9910f164 100644
--- a/drivers/gpu/drm/mediatek/mtk_hdmi.c
+++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c
@@ -341,6 +341,9 @@ static void mtk_hdmi_hw_send_info_frame(struct mtk_hdmi *hdmi, u8 *buffer,
 		ctrl_frame_en = VS_EN;
 		ctrl_reg = GRL_ACP_ISRC_CTRL;
 		break;
+	default:
+		dev_err(hdmi->dev, "Unknown infoframe type %d\n", frame_type);
+		return;
 	}
 	mtk_hdmi_clear_bits(hdmi, ctrl_reg, ctrl_frame_en);
 	mtk_hdmi_write(hdmi, GRL_INFOFRM_TYPE, frame_type);