Make hdmi_write_hdmi_infoframe() and hdmi_clear_infoframe() callbacks
return -EOPNOTSUPP for unsupported InfoFrames and make sure that
atomic_check() callback doesn't allow unsupported InfoFrames to be
enabled.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
---
 drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c
index 39332c57f2c54296f39e27612544f4fbf923863f..9a77e880b7f58403691338ee8c22d24af570acbf 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c
@@ -935,7 +935,7 @@ static int dw_hdmi_qp_bridge_clear_infoframe(struct drm_bridge *bridge,
 			       PKTSCHED_PKT_EN);
 		break;
 	default:
-		dev_dbg(hdmi->dev, "Unsupported infoframe type %x\n", type);
+		return -EOPNOTSUPP;
 	}
 
 	return 0;
@@ -960,12 +960,26 @@ static int dw_hdmi_qp_bridge_write_infoframe(struct drm_bridge *bridge,
 		return dw_hdmi_qp_config_audio_infoframe(hdmi, buffer, len);
 
 	default:
-		dev_dbg(hdmi->dev, "Unsupported infoframe type %x\n", type);
-		return 0;
+		return -EOPNOTSUPP;
 	}
 }
 
+static int dw_hdmi_qp_bridge_atomic_check(struct drm_bridge *bridge,
+					  struct drm_bridge_state *bridge_state,
+					  struct drm_crtc_state *crtc_state,
+					  struct drm_connector_state *conn_state)
+{
+	/* not supported by the driver */
+	conn_state->hdmi.infoframes.spd.set = false;
+
+	/* FIXME: not supported by the driver */
+	conn_state->hdmi.infoframes.hdmi.set = false;
+
+	return 0;
+}
+
 static const struct drm_bridge_funcs dw_hdmi_qp_bridge_funcs = {
+	.atomic_check = dw_hdmi_qp_bridge_atomic_check,
 	.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
 	.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
 	.atomic_reset = drm_atomic_helper_bridge_reset,

-- 
2.47.3