[PATCH] drm/mediatek: Fix warning about unhandled enum value

[Sean Paul <sean@poorly.run>]

From: Sean Paul <seanpaul@chromium.org>

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 <uma.shankar@intel.com>
Cc: Shashank Sharma <shashank.sharma@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <maxime.ripard@bootlin.com>
Cc: Sean Paul <sean@poorly.run>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
Cc: Hans Verkuil <hansverk@cisco.com>
Cc: dri-devel@lists.freedesktop.org
Cc: linux-fbdev@vger.kernel.org
Signed-off-by: Sean Paul <seanpaul@chromium.org>
---
 drivers/gpu/drm/mediatek/mtk_hdmi.c | 3 +++
 1 file changed, 3 insertions(+)

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);
-- 
Sean Paul, Software Engineer, Google / Chromium OS