This is a note to let you know that I've just added the patch titled
drm/vrr: Set VRR capable prop only if it is attached to connector
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-vrr-set-vrr-capable-prop-only-if-it-is-attached-.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 09a7bad2e3a660e81a6cc9776591017aa8388b78
Author: Manasi Navare <manasi.d.navare@xxxxxxxxx>
Date: Thu Feb 24 17:30:54 2022 -0800
drm/vrr: Set VRR capable prop only if it is attached to connector
[ Upstream commit 62929726ef0ec72cbbe9440c5d125d4278b99894 ]
VRR capable property is not attached by default to the connector
It is attached only if VRR is supported.
So if the driver tries to call drm core set prop function without
it being attached that causes NULL dereference.
Cc: Jani Nikula <jani.nikula@xxxxxxxxx>
Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Manasi Navare <manasi.d.navare@xxxxxxxxx>
Reviewed-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20220225013055.9282-1-manasi.d.navare@xxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index 717c4e7271b0..5163433ac561 100644
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -2155,6 +2155,9 @@ EXPORT_SYMBOL(drm_connector_attach_max_bpc_property);
void drm_connector_set_vrr_capable_property(
struct drm_connector *connector, bool capable)
{
+ if (!connector->vrr_capable_property)
+ return;
+
drm_object_property_set_value(&connector->base,
connector->vrr_capable_property,
capable);
