@@ -397,6 +397,64 @@ static int mei_verify_lprime(struct device *dev, void *hdcp_data,
return 0;
}
+/*
+ * mei_get_session_key : Function to prepare SKE_Send_Eks.
+ *
+ * @dev : device corresponding to the mei_cl_device
+ * @hdcp_data : Intel HW specific hdcp data
+ * @ske_data : SKE_Send_Eks msg from mei.
+ *
+ * Returns 0 on Success, <0 on Failure
+ */
+static int mei_get_session_key(struct device *dev, void *hdcp_data,
+ struct hdcp2_ske_send_eks *ske_data)
+{
+ struct wired_cmd_get_session_key_in get_skey_in = { { 0 } };
+ struct wired_cmd_get_session_key_out get_skey_out = { { 0 } };
+ struct mei_cl_device *cldev;
+ struct mei_hdcp_data *data = hdcp_data;
+ ssize_t byte;
+
+ if (!dev || !data || !ske_data)
+ return -EINVAL;
+
+ cldev = to_mei_cl_device(dev);
+
+ get_skey_in.header.api_version = HDCP_API_VERSION;
+ get_skey_in.header.command_id = WIRED_GET_SESSION_KEY;
+ get_skey_in.header.status = ME_HDCP_STATUS_SUCCESS;
+ get_skey_in.header.buffer_len = WIRED_CMD_BUF_LEN_GET_SESSION_KEY_IN;
+
+ get_skey_in.port.integrated_port_type = data->port_type;
+ get_skey_in.port.physical_port = data->port;
+
+ byte = mei_cldev_send(cldev, (u8 *)&get_skey_in, sizeof(get_skey_in));
+ if (byte < 0) {
+ dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
+ return byte;
+ }
+
+ byte = mei_cldev_recv(cldev, (u8 *)&get_skey_out, sizeof(get_skey_out));
+
+ if (byte < 0) {
+ dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
+ return byte;
+ }
+
+ if (get_skey_out.header.status != ME_HDCP_STATUS_SUCCESS) {
+ dev_dbg(dev, "ME cmd 0x%08X failed. status: 0x%X\n",
+ WIRED_GET_SESSION_KEY, get_skey_out.header.status);
+ return -EIO;
+ }
+
+ ske_data->msg_id = HDCP_2_2_SKE_SEND_EKS;
+ memcpy(ske_data->e_dkey_ks, get_skey_out.e_dkey_ks,
+ HDCP_2_2_E_DKEY_KS_LEN);
+ memcpy(ske_data->riv, get_skey_out.r_iv, HDCP_2_2_RIV_LEN);
+
+ return 0;
+}
+
static __attribute__((unused))
struct i915_hdcp_component_ops mei_hdcp_ops = {
.owner = THIS_MODULE,
@@ -406,7 +464,7 @@ struct i915_hdcp_component_ops mei_hdcp_ops = {
.store_pairing_info = mei_store_pairing_info,
.initiate_locality_check = mei_initiate_locality_check,
.verify_lprime = mei_verify_lprime,
- .get_session_key = NULL,
+ .get_session_key = mei_get_session_key,
.repeater_check_flow_prepare_ack = NULL,
.verify_mprime = NULL,
.enable_hdcp_authentication = NULL,