Requests ME to start the second stage of HDCP2.2 authentication, called Locality Check.
On Success, ME FW will provide LC_Init message to send to hdcp sink.
v2: Rebased.
Signed-off-by: Ramalingam C ramalingam.c@intel.com --- drivers/misc/mei/hdcp/mei_hdcp.c | 64 ++++++++++++++++++++++++++++++++++++++++ include/linux/mei_hdcp.h | 8 +++++ 2 files changed, 72 insertions(+)
diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c index 753a6a466611..ff19de58222f 100644 --- a/drivers/misc/mei/hdcp/mei_hdcp.c +++ b/drivers/misc/mei/hdcp/mei_hdcp.c @@ -339,6 +339,70 @@ int mei_store_pairing_info(struct mei_hdcp_data *data, } EXPORT_SYMBOL(mei_store_pairing_info);
+/** + * mei_initiate_locality_check: + * Function to prepare LC_Init. + * + * @data : Intel HW specific Data + * @hdcp2_lc_init : Pointer for storing LC_Init + * + * Returns 0 on Success, <0 on Failure + */ +int mei_initiate_locality_check(struct mei_hdcp_data *data, + struct hdcp2_lc_init *lc_init_data) +{ + struct wired_cmd_init_locality_check_in lc_init_in = { { 0 } }; + struct wired_cmd_init_locality_check_out lc_init_out = { { 0 } }; + enum me_hdcp_status status; + struct device *dev; + ssize_t byte; + + if (!data || !lc_init_data) + return -EINVAL; + + /* check for the mei_device enabled or not */ + if (!mei_cldev_active_and_enabled(data->cldev)) + return -ENODEV; + + dev = &data->cldev->dev; + + lc_init_in.header.api_version = HDCP_API_VERSION; + lc_init_in.header.command_id = WIRED_INIT_LOCALITY_CHECK; + lc_init_in.header.status = ME_HDCP_STATUS_SUCCESS; + lc_init_in.header.buffer_len = WIRED_CMD_BUF_LEN_INIT_LOCALITY_CHECK_IN; + + lc_init_in.port.integrated_port_type = data->port_type; + lc_init_in.port.physical_port = data->port; + + /* Request to ME */ + byte = mei_cldev_send(data->cldev, (u8 *)&lc_init_in, + sizeof(lc_init_in)); + if (byte < 0) { + dev_err(dev, "mei_cldev_send failed. %d\n", (int)byte); + return byte; + } + + /* Response from ME */ + byte = mei_cldev_recv(data->cldev, (u8 *)&lc_init_out, + sizeof(lc_init_out)); + if (byte < 0) { + dev_err(dev, "mei_cldev_recv failed. %d\n", (int)byte); + return byte; + } + + status = (enum me_hdcp_status)lc_init_out.header.status; + if (status != ME_HDCP_STATUS_SUCCESS) { + dev_err(dev, "ME cmd 0x%08X Failed. status: 0x%X\n", + WIRED_INIT_LOCALITY_CHECK, status); + return -1; + } + + lc_init_data->msg_id = HDCP_2_2_LC_INIT; + memcpy(lc_init_data->r_n, lc_init_out.r_n, HDCP_2_2_RN_LEN); + return 0; +} +EXPORT_SYMBOL(mei_initiate_locality_check); + static int mei_hdcp_probe(struct mei_cl_device *cldev, const struct mei_cl_device_id *id) { diff --git a/include/linux/mei_hdcp.h b/include/linux/mei_hdcp.h index 449ac3af4d53..fd8a26dddacb 100644 --- a/include/linux/mei_hdcp.h +++ b/include/linux/mei_hdcp.h @@ -115,6 +115,8 @@ int mei_verify_hprime(struct mei_hdcp_data *data, struct hdcp2_ake_send_hprime *rx_hprime); int mei_store_pairing_info(struct mei_hdcp_data *data, struct hdcp2_ake_send_pairing_info *pairing_info); +int mei_initiate_locality_check(struct mei_hdcp_data *data, + struct hdcp2_lc_init *lc_init_data); #else static inline int mei_hdcp_cldev_get_reference(void *client_data, @@ -156,5 +158,11 @@ int mei_store_pairing_info(struct mei_hdcp_data *data, { return -ENODEV; } +static inline +int mei_initiate_locality_check(struct mei_hdcp_data *data, + struct hdcp2_lc_init *lc_init_data) +{ + return -ENODEV; +} #endif /* defined (CONFIG_INTEL_MEI_HDCP) */ #endif /* defined (_LINUX_MEI_HDCP_H) */