[PATCH v4 09/10] drm/connector: verify that HDMI connectors support necessary InfoFrames

[Dmitry Baryshkov]

Check that connector initialized by drmm_connector_hdmi_init() supports
AVI InfoFrames and warn if it doesn't support Vendor-Specific
InfofRames (HDMI InfoFrames are more or less required).

Suggested-by: Maxime Ripard <mripard at kernel.org>
Acked-by: Daniel Stone <daniels at collabora.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov at oss.qualcomm.com>
---
 drivers/gpu/drm/drm_connector.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index 92a75684a0f7375d3a94e8c666cb71064ecc8035..222a0ef66d9fdbdb56108ceeb40e7f369d810350 100644
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -602,6 +602,13 @@ int drmm_connector_hdmi_init(struct drm_device *dev,
 	if (!(max_bpc == 8 || max_bpc == 10 || max_bpc == 12))
 		return -EINVAL;
 
+	/* AVI is required */
+	if (!(supported_infoframes & DRM_CONNECTOR_INFOFRAME_AVI))
+		return -EINVAL;
+
+	if (!(supported_infoframes & DRM_CONNECTOR_INFOFRAME_VENDOR))
+		drm_info(dev, "HDMI connector with no support for Vendor-Specific InfoFrame\n");
+
 	ret = drmm_connector_init(dev, connector, funcs, connector_type, ddc);
 	if (ret)
 		return ret;

-- 
2.47.3