DRM HDCP2.2 service function interface is defiend.
This will be initialized from display driver.
Signed-off-by: Ramalingam C <ramalingam.c@xxxxxxxxx>
---
include/drm/drm_hdcp.h | 207 +++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 207 insertions(+)
diff --git a/include/drm/drm_hdcp.h b/include/drm/drm_hdcp.h
index 1f9a04d..94acd8d 100644
--- a/include/drm/drm_hdcp.h
+++ b/include/drm/drm_hdcp.h
@@ -30,6 +30,18 @@
struct drm_connector;
struct drm_hdcp;
+struct wired_ake_init;
+struct wired_ake_send_cert;
+struct wired_ake_no_stored_km;
+struct wired_ake_send_hprime;
+struct wired_ake_send_pairing_info;
+struct wired_lc_init;
+struct wired_lc_send_lprime;
+struct wired_ske_send_eks;
+struct wired_rep_send_receiverid_list;
+struct wired_rep_send_ack;
+struct wired_rep_stream_ready;
+
/**
* HDCP Software stack specific
*/
@@ -71,6 +83,200 @@ enum wired_protocol {
WIRED_PROTOCOL_DP
};
+struct drm_hdcp2_funcs {
+
+ /* Authencation and Key Exchange related */
+ /**
+ * @prepare_ake_init:
+ *
+ * Function to prepare the complete ake_init message and
+ * pass it onto DRM.
+ *
+ * returns HDCP_STATUS_SUCCESS on success
+ * else non-zero HDCP error states
+ **/
+ enum hdcp_status (*prepare_ake_init)(struct drm_hdcp *hdcp,
+ struct wired_ake_init *ake_data, size_t buf_sz,
+ size_t *msg_sz);
+
+ /**
+ * @verify_rx_cert:
+ *
+ * Service Function for verifying the DCP signature of rx
+ * certificate received from HDCP sink and prepare the msg with km as
+ * AKE_No_Stored_km or AKE_Stored_km.
+ *
+ * Involves:
+ * DCP signature verification.
+ * Receiver ID check against the SRM table's revocation list.
+ * For Non-Paired receiver
+ * Generate a pseudo-random 128-bit Master Key Km
+ * Encrypt km with kpub_rx
+ * Form AKE_No_Stored_km msg
+ * For Paired Device
+ * Forms AKE_Stored_km with stored Ekh(km) and m
+ *
+ * returns HDCP_STATUS_SUCCESS on success
+ * else non-zero HDCP error states
+ **/
+ enum hdcp_status (*verify_rx_cert_prepare_km)(struct drm_hdcp *hdcp,
+ struct wired_ake_send_cert *rx_cert,
+ size_t rx_cert_sz, bool *paired,
+ struct wired_ake_no_stored_km *ek_pub_km,
+ size_t buf_sz, size_t *msg_sz);
+
+ /**
+ * @verify_hprime:
+ *
+ * Service Function for verifying the hprime received from receiver.
+ * Involves:
+ * Prepare hprime and compare with received hprime
+ * hprime = HMAC_SHA256(r_tx || RxCaps || TxCaps, kd)
+ *
+ * returns HDCP_STATUS_SUCCESS on success
+ * else non-zero HDCP error states
+ **/
+ enum hdcp_status (*verify_hprime)(struct drm_hdcp *hdcp,
+ struct wired_ake_send_hprime *rx_hprime,
+ size_t hprime_sz);
+
+ /**
+ * @store_paring_info:
+ *
+ * Service Function to store the Ekh(km) along with m in
+ * non-volatile memory. This is just to fast track the authentication
+ * of same receiver from next time onwards.
+ *
+ * returns HDCP_STATUS_SUCCESS on success
+ * else non-zero HDCP error states
+ **/
+ enum hdcp_status (*store_paring_info)(struct drm_hdcp *hdcp,
+ struct wired_ake_send_pairing_info *pairing_info,
+ size_t pairing_info_sz);
+
+ /* Locality check related services */
+ /**
+ * @prepare_lc_init:
+ *
+ * Service Function to prepare LC_INIT
+ * Involves:
+ * Generation of 64bit pseudo aandom nonce rn
+ *
+ * returns HDCP_STATUS_SUCCESS on success
+ * else non-zero HDCP error states
+ **/
+ enum hdcp_status (*prepare_lc_init)(struct drm_hdcp *hdcp,
+ struct wired_lc_init *lc_init_data, size_t buf_sz,
+ size_t *msg_sz);
+
+ /**
+ * @verify_lprime:
+ *
+ * Service Function to verify the lprime received from receiver
+ * Involves
+ * Calculate L = HMAC-SHA256(rn, kd XOR rrx)
+ *
+ * returns HDCP_STATUS_SUCCESS on success
+ * else non-zero HDCP error states
+ **/
+ enum hdcp_status (*verify_lprime)(struct drm_hdcp *hdcp,
+ struct wired_lc_send_lprime *rx_lprime,
+ size_t lprime_sz);
+
+ /* SKE related services */
+ /**
+ * @prepare_skey:
+ *
+ * Service Function to prepare SKE_Send_Eks msg
+ * Involves
+ * Generation of Edkey(ks) and riv
+ *
+ * returns HDCP_STATUS_SUCCESS on success
+ * else non-zero HDCP error states
+ **/
+ enum hdcp_status (*prepare_skey)(struct drm_hdcp *hdcp,
+ struct wired_ske_send_eks *ske_data,
+ size_t buf_sz, size_t *msg_sz);
+
+ /* Repeater Support services */
+ /**
+ * @verify_rep_topology:
+ *
+ * Service Function to validate the downstream topology and to prepare
+ * repeater_auth_ack message.
+ * Involves
+ * Validate the devcie count and Depth
+ * Look out for HDCP1.x devices or HDCP2.0 devices
+ * Check receiver ID list against revocation list
+ * Check for roll over of seq_num_V
+ * validate the vprime with Most Significant 128bits of V
+ * V’ = HMAC-SHA256(ReceiverID list || RxInfo || seq_num_V, kd)
+ * Least Significant 128bits of V is formed as ack msg.
+ *
+ * returns HDCP_STATUS_SUCCESS on success
+ * else non-zero HDCP error states
+ **/
+ enum hdcp_status (*verify_rep_topology_prepare_ack)(
+ struct drm_hdcp *hdcp,
+ struct wired_rep_send_receiverid_list *rep_topology,
+ size_t receiverid_list_sz,
+ struct wired_rep_send_ack *rep_send_ack, size_t buf_sz,
+ size_t *msg_sz);
+
+ /**
+ * @verify_mprime:
+ *
+ * Service Function to verify the MPrime received
+ * M’(or M) = HMAC-SHA256(StreamID_Type || seq_num_M, SHA256(kd))
+ *
+ * returns HDCP_STATUS_SUCCESS on success
+ * else non-zero HDCP error states
+ **/
+ enum hdcp_status (*verify_mprime)(struct drm_hdcp *hdcp,
+ struct wired_rep_stream_ready *stream_ready,
+ size_t stream_ready_sz);
+
+ /**
+ * @authenticate:
+ *
+ * Service Function to configure HW as Authenticated
+ *
+ * returns HDCP_STATUS_SUCCESS on success
+ * else non-zero HDCP error states
+ **/
+ enum hdcp_status (*authenticate)(struct drm_hdcp *hdcp);
+
+ /**
+ * @deauthenticate:
+ *
+ * Service Function to configure HW as deauthenticated
+ *
+ * returns HDCP_STATUS_SUCCESS on success
+ * else non-zero HDCP error states
+ **/
+ enum hdcp_status (*deauthenticate)(struct drm_hdcp *hdcp);
+
+ /**
+ * @enable_encryption:
+ *
+ * Service Function to enable encryption at platform level.
+ *
+ * returns HDCP_STATUS_SUCCESS on success
+ * else non-zero HDCP error states
+ **/
+ enum hdcp_status (*enable_encryption)(struct drm_hdcp *hdcp);
+
+ /**
+ * @disable_encryption:
+ *
+ * Service function to disable encryption at platform level.
+ *
+ * returns HDCP_STATUS_SUCCESS on success
+ * else non-zero HDCP error states
+ **/
+ enum hdcp_status (*disable_encryption)(struct drm_hdcp *hdcp);
+};
+
struct drm_hdcp_funcs {
/**
@@ -125,6 +331,7 @@ struct drm_hdcp {
enum wired_protocol protocol;
const struct drm_hdcp_funcs *hdcp_funcs;
+ const struct drm_hdcp2_funcs *hdcp2_funcs;
struct mutex mutex;
};
--
2.7.4
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