With the introduction of the HDMI Connector framework the driver might end up creating the max_bpc property with min = max = 8. IGT insists that such properties carry the 'immutable' flag. Automatically set the flag if the driver asks for the max_bpc property with min == max. Fixes: aadb3e16b8f3 ("drm/connector: hdmi: Add output BPC to the connector state") Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx> --- drivers/gpu/drm/drm_connector.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c index ab6ab7ff7ea8..33847fd63628 100644 --- a/drivers/gpu/drm/drm_connector.c +++ b/drivers/gpu/drm/drm_connector.c @@ -2610,7 +2610,12 @@ int drm_connector_attach_max_bpc_property(struct drm_connector *connector, prop = connector->max_bpc_property; if (!prop) { - prop = drm_property_create_range(dev, 0, "max bpc", min, max); + u32 flags = 0; + + if (min == max) + flags |= DRM_MODE_PROP_IMMUTABLE; + + prop = drm_property_create_range(dev, flags, "max bpc", min, max); if (!prop) return -ENOMEM; -- 2.39.2