https://bugzilla.kernel.org/show_bug.cgi?id=206519
--- Comment #6 from Shlomo (shlomo@fastmail.com) --- Yes, this fixes the bug.
I applied your patch over linux v5.5, but I first had to modify it so it would apply: - drm_connector_attach_content_protection_property(&aconnector->base, true); + drm_connector_attach_content_protection_property(&aconnector->base, false);