Provides Pairing info to ME to store.
Pairing is a process to fast track the subsequent authentication with the same HDCP sink.
On Success, received HDCP pairing info is stored in non-volatile memory of ME.
v2: Rebased.
Signed-off-by: Ramalingam C ramalingam.c@intel.com --- drivers/misc/mei/hdcp/mei_hdcp.c | 66 ++++++++++++++++++++++++++++++++++++++++ include/linux/mei_hdcp.h | 8 +++++ 2 files changed, 74 insertions(+)
diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c index 37faca9a3cc8..753a6a466611 100644 --- a/drivers/misc/mei/hdcp/mei_hdcp.c +++ b/drivers/misc/mei/hdcp/mei_hdcp.c @@ -273,6 +273,72 @@ int mei_verify_hprime(struct mei_hdcp_data *data, } EXPORT_SYMBOL(mei_verify_hprime);
+/** + * mei_store_pairing_info: + * Function to store pairing info received from panel + * + * @data : Intel HW specific Data + * @pairing_info : Pointer for AKE_Send_Pairing_Info + * + * Returns 0 on Success, <0 on Failure + */ + +int mei_store_pairing_info(struct mei_hdcp_data *data, + struct hdcp2_ake_send_pairing_info *pairing_info) +{ + struct wired_cmd_ake_send_pairing_info_in pairing_info_in = { { 0 } }; + struct wired_cmd_ake_send_pairing_info_out pairing_info_out = { { 0 } }; + enum me_hdcp_status status = ME_HDCP_STATUS_UNKNOWN_ERROR; + struct device *dev; + ssize_t byte; + + if (!data || !pairing_info) + return -EINVAL; + + /* check for the mei_device enabled or not */ + if (!mei_cldev_active_and_enabled(data->cldev)) + return -ENODEV; + + dev = &data->cldev->dev; + + pairing_info_in.header.api_version = HDCP_API_VERSION; + pairing_info_in.header.command_id = WIRED_AKE_SEND_PAIRING_INFO; + pairing_info_in.header.status = ME_HDCP_STATUS_SUCCESS; + pairing_info_in.header.buffer_len = + WIRED_CMD_BUF_LEN_SEND_PAIRING_INFO_IN; + + pairing_info_in.port.integrated_port_type = data->port_type; + pairing_info_in.port.physical_port = data->port; + + memcpy(pairing_info_in.e_kh_km, pairing_info->e_kh_km, + sizeof(pairing_info_in.e_kh_km)); + + /* Request to ME */ + byte = mei_cldev_send(data->cldev, (u8 *)&pairing_info_in, + sizeof(pairing_info_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 *)&pairing_info_out, + sizeof(pairing_info_out)); + if (byte < 0) { + dev_err(dev, "mei_cldev_recv failed. %d\n", (int)byte); + return byte; + } + + status = (enum me_hdcp_status)pairing_info_out.header.status; + if (status != ME_HDCP_STATUS_SUCCESS) { + dev_err(dev, "ME cmd 0x%08X failed. Status: 0x%X\n", + WIRED_AKE_SEND_PAIRING_INFO, status); + return -1; + } + return 0; +} +EXPORT_SYMBOL(mei_store_pairing_info); + 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 3590e3421134..449ac3af4d53 100644 --- a/include/linux/mei_hdcp.h +++ b/include/linux/mei_hdcp.h @@ -113,6 +113,8 @@ mei_verify_receiver_cert_prepare_km(struct mei_hdcp_data *data, size_t *msg_sz); 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); #else static inline int mei_hdcp_cldev_get_reference(void *client_data, @@ -148,5 +150,11 @@ int mei_verify_hprime(struct mei_hdcp_data *data, { return -ENODEV; } +static inline +int mei_store_pairing_info(struct mei_hdcp_data *data, + struct hdcp2_ake_send_pairing_info *pairing_info) +{ + return -ENODEV; +} #endif /* defined (CONFIG_INTEL_MEI_HDCP) */ #endif /* defined (_LINUX_MEI_HDCP_H) */