Commit 4ccf9446 authored Jan 25, 2021 by Dingchen (David) Zhang Committed by Alex Deucher Apr 20, 2021

drm/amd/display: add handling for hdcp2 rx id list validation



[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@amd.com>
Reviewed-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

parent 26739690

drivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -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);