On Mon, Dec 09, 2024 at 02:46:32PM +0800, Xin Ji wrote: > When user enabled HDCP feature, upper layer will set HDCP content > to DRM_MODE_CONTENT_PROTECTION_DESIRED. Next, anx7625 will update > HDCP content to DRM_MODE_CONTENT_PROTECTION_ENABLED if down stream > support HDCP feature. > > However once HDCP content turn to DRM_MODE_CONTENT_PROTECTION_ENABLED > upper layer will not update the HDCP content to > DRM_MODE_CONTENT_PROTECTION_UNDESIRED until monitor disconnect. What is "upper layer"? Is it a kernel or a userspace?