Make write_hdmi_infoframe() and 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/rockchip/inno_hdmi.c | 47 +++++++++++++++++++++++++++---------
 1 file changed, 36 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/inno_hdmi.c b/drivers/gpu/drm/rockchip/inno_hdmi.c
index f24827dc1421cf5e0c1be63a80da23d645cf3f24..733294c6807da4663285ebd482181589c37f960a 100644
--- a/drivers/gpu/drm/rockchip/inno_hdmi.c
+++ b/drivers/gpu/drm/rockchip/inno_hdmi.c
@@ -641,13 +641,11 @@ static int inno_hdmi_disable_frame(struct drm_connector *connector,
 {
 	struct inno_hdmi *hdmi = connector_to_inno_hdmi(connector);
 
-	if (type != HDMI_INFOFRAME_TYPE_AVI) {
-		drm_err(connector->dev,
-			"Unsupported infoframe type: %u\n", type);
-		return 0;
-	}
+	if (type != HDMI_INFOFRAME_TYPE_AVI)
+		return -EOPNOTSUPP;
 
 	hdmi_writeb(hdmi, HDMI_CONTROL_PACKET_BUF_INDEX, INFOFRAME_AVI);
+	// XXX: this doesn't seem to actually disable the infoframe.
 
 	return 0;
 }
@@ -659,11 +657,8 @@ static int inno_hdmi_upload_frame(struct drm_connector *connector,
 	struct inno_hdmi *hdmi = connector_to_inno_hdmi(connector);
 	ssize_t i;
 
-	if (type != HDMI_INFOFRAME_TYPE_AVI) {
-		drm_err(connector->dev,
-			"Unsupported infoframe type: %u\n", type);
-		return 0;
-	}
+	if (type != HDMI_INFOFRAME_TYPE_AVI)
+		return -EOPNOTSUPP;
 
 	inno_hdmi_disable_frame(connector, type);
 
@@ -673,6 +668,36 @@ static int inno_hdmi_upload_frame(struct drm_connector *connector,
 	return 0;
 }
 
+static int inno_hdmi_connector_atomic_check(struct drm_connector *connector,
+					    struct drm_atomic_state *state)
+{
+	struct drm_connector_state *conn_state =
+		drm_atomic_get_new_connector_state(state, connector);
+	int ret;
+
+	ret = drm_atomic_helper_connector_hdmi_check(connector, state);
+	if (ret)
+		return ret;
+
+	/* 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;
+
+	/* should not happen, audio support not enabled */
+	if (drm_WARN_ON_ONCE(connector->dev,
+			     connector->hdmi.infoframes.audio.set))
+		return -EOPNOTSUPP;
+
+	/* should not happen, HDR support not enabled */
+	if (drm_WARN_ON_ONCE(connector->dev,
+			     conn_state->hdmi.infoframes.hdr_drm.set))
+		return -EOPNOTSUPP;
+
+	return 0;
+}
+
 static const struct drm_connector_hdmi_funcs inno_hdmi_hdmi_connector_funcs = {
 	.clear_infoframe	= inno_hdmi_disable_frame,
 	.write_infoframe	= inno_hdmi_upload_frame,
@@ -1029,7 +1054,7 @@ static const struct drm_connector_funcs inno_hdmi_connector_funcs = {
 };
 
 static struct drm_connector_helper_funcs inno_hdmi_connector_helper_funcs = {
-	.atomic_check = drm_atomic_helper_connector_hdmi_check,
+	.atomic_check = inno_hdmi_connector_atomic_check,
 	.get_modes = inno_hdmi_connector_get_modes,
 	.mode_valid = inno_hdmi_connector_mode_valid,
 };

-- 
2.47.3