diff options
| -rw-r--r-- | drivers/misc/mei/hdcp/mei_hdcp.c | 60 |
1 files changed, 59 insertions, 1 deletions
diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c index 7c880efe9134..03f8af257ecc 100644 --- a/drivers/misc/mei/hdcp/mei_hdcp.c +++ b/drivers/misc/mei/hdcp/mei_hdcp.c @@ -351,6 +351,64 @@ mei_hdcp_initiate_locality_check(struct device *dev, return 0; } +/** + * mei_hdcp_verify_lprime() - Verify lprime. + * @dev: device corresponding to the mei_cl_device + * @data: Intel HW specific hdcp data + * @rx_lprime: LC_Send_L_prime msg for ME FW verification + * + * Return: 0 on Success, <0 on Failure + */ +static int +mei_hdcp_verify_lprime(struct device *dev, struct hdcp_port_data *data, + struct hdcp2_lc_send_lprime *rx_lprime) +{ + struct wired_cmd_validate_locality_in verify_lprime_in = { { 0 } }; + struct wired_cmd_validate_locality_out verify_lprime_out = { { 0 } }; + struct mei_cl_device *cldev; + ssize_t byte; + + if (!dev || !data || !rx_lprime) + return -EINVAL; + + cldev = to_mei_cl_device(dev); + + verify_lprime_in.header.api_version = HDCP_API_VERSION; + verify_lprime_in.header.command_id = WIRED_VALIDATE_LOCALITY; + verify_lprime_in.header.status = ME_HDCP_STATUS_SUCCESS; + verify_lprime_in.header.buffer_len = + WIRED_CMD_BUF_LEN_VALIDATE_LOCALITY_IN; + + verify_lprime_in.port.integrated_port_type = data->port_type; + verify_lprime_in.port.physical_port = mei_get_ddi_index(data->port); + + memcpy(verify_lprime_in.l_prime, rx_lprime->l_prime, + HDCP_2_2_L_PRIME_LEN); + + byte = mei_cldev_send(cldev, (u8 *)&verify_lprime_in, + sizeof(verify_lprime_in)); + if (byte < 0) { + dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte); + return byte; + } + + byte = mei_cldev_recv(cldev, (u8 *)&verify_lprime_out, + sizeof(verify_lprime_out)); + if (byte < 0) { + dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte); + return byte; + } + + if (verify_lprime_out.header.status != ME_HDCP_STATUS_SUCCESS) { + dev_dbg(dev, "ME cmd 0x%08X failed. status: 0x%X\n", + WIRED_VALIDATE_LOCALITY, + verify_lprime_out.header.status); + return -EIO; + } + + return 0; +} + static const __attribute__((unused)) struct i915_hdcp_component_ops mei_hdcp_ops = { .owner = THIS_MODULE, @@ -360,7 +418,7 @@ struct i915_hdcp_component_ops mei_hdcp_ops = { .verify_hprime = mei_hdcp_verify_hprime, .store_pairing_info = mei_hdcp_store_pairing_info, .initiate_locality_check = mei_hdcp_initiate_locality_check, - .verify_lprime = NULL, + .verify_lprime = mei_hdcp_verify_lprime, .get_session_key = NULL, .repeater_check_flow_prepare_ack = NULL, .verify_mprime = NULL, |