[PATCH 04/19] drm/amd/display: add handling for hdcp2 rx id list validation

[Aurabindo Pillai]

From: "Dingchen (David) Zhang" <dingchen.zhang at amd.com>

[why]
the current implementation of hdcp2 rx id list validation does not
have handler/checker for invalid message status, e.g. HMAC, the V
parameter calculated from PSP not matching the V prime from Rx.

[how]
return a generic FAILURE for any message status not SUCCESS or
REVOKED.

Signed-off-by: Dingchen (David) Zhang <dingchen.zhang at amd.com>
Reviewed-by: Bhawanpreet Lakha <Bhawanpreet.Lakha at amd.com>
Acked-by: Aurabindo Pillai <aurabindo.pillai at amd.com>
---
 drivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c
index 9d7ca316dc3f..26f96c05e0ec 100644
--- a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c
+++ b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c
@@ -791,6 +791,8 @@ enum mod_hdcp_status mod_hdcp_hdcp2_validate_rx_id_list(struct mod_hdcp *hdcp)
 			   TA_HDCP2_MSG_AUTHENTICATION_STATUS__RECEIVERID_REVOKED) {
 			hdcp->connection.is_hdcp2_revoked = 1;
 			status = MOD_HDCP_STATUS_HDCP2_RX_ID_LIST_REVOKED;
+		} else {
+			status = MOD_HDCP_STATUS_HDCP2_VALIDATE_RX_ID_LIST_FAILURE;
 		}
 	}
 	mutex_unlock(&psp->hdcp_context.mutex);
-- 
2.31.1