Commit da2d6684 authored by Suraj Kandpal's avatar Suraj Kandpal Committed by Ankit Nautiyal
Browse files

drm/i915/hdcp: Fail Repeater authentication if Type1 device not present 



Fail repeater authentication step in case RX_INFO indicates
HDCP1.x or HDCP2.0/2.1 device is present downstream in repeater
topology and content type set by userspace is Type1.

--v2
-Fix build error.

--v3
-remove mst encoder check as branch device also act as repeater

Signed-off-by: default avatarSuraj Kandpal <suraj.kandpal@intel.com>
Reviewed-by: default avatarAnkit Nautiyal <ankit.k.nautiyal@intel.com>
Signed-off-by: default avatarAnkit Nautiyal <ankit.k.nautiyal@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231215050915.2070119-1-suraj.kandpal@intel.com
parent 89d6708d

drivers/gpu/drm/i915/display/intel_hdcp.c

+6 −0
Original line number Diff line number Diff line
@@ -1633,6 +1633,12 @@ int hdcp2_authenticate_repeater_topology(struct intel_connector *connector) 
		!HDCP_2_2_HDCP1_DEVICE_CONNECTED(rx_info[1]) &&

		!HDCP_2_2_HDCP_2_0_REP_CONNECTED(rx_info[1]);



	if (!dig_port->hdcp_mst_type1_capable && hdcp->content_type) {

		drm_dbg_kms(&i915->drm,

			    "HDCP1.x or 2.0 Legacy Device Downstream\n");

		return -EINVAL;

	}



	/* Converting and Storing the seq_num_v to local variable as DWORD */

	seq_num_v =

		drm_hdcp_be24_to_cpu((const u8 *)msgs.recvid_list.seq_num_v);