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.
Signed-off-by: Suraj Kandpal <suraj.kandpal@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_hdcp.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c b/drivers/gpu/drm/i915/display/intel_hdcp.c
index 39b3f7c0c77c..2aaf924fceb1 100644
--- a/drivers/gpu/drm/i915/display/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/display/intel_hdcp.c
@@ -1633,6 +1633,13 @@ 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 &&
+ !intel_encoder_is_mst(connector->encoder)) {
+ drm_dbg_kms(&dev_priv->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);
--
2.25.1
