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

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[ Upstream commit 4ccf9446b2a3615615045346c97f8a1e2a16568a ]

[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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dingchen (David) Zhang 2021-01-25 18:05:50 -05:00 committed by Greg Kroah-Hartman
parent fa9952e854
commit 8be5e713f7
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c
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@ -789,6 +789,8 @@ 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);