Request the ME to terminate the HDCP2.2 session for a port.
On Success, ME FW will mark the intel port as Deauthenticated and terminate the wired HDCP2.2 Tx session started due to the cmd WIRED_INITIATE_HDCP2_SESSION.
v2: Rebased.
Signed-off-by: Ramalingam C ramalingam.c@intel.com --- drivers/misc/mei/hdcp/mei_hdcp.c | 63 ++++++++++++++++++++++++++++++++++++++++ include/linux/mei_hdcp.h | 5 ++++ 2 files changed, 68 insertions(+)
diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c index c73715ba9693..e237ddb44b9d 100644 --- a/drivers/misc/mei/hdcp/mei_hdcp.c +++ b/drivers/misc/mei/hdcp/mei_hdcp.c @@ -765,6 +765,69 @@ int mei_enable_hdcp_authentication(struct mei_hdcp_data *data) } EXPORT_SYMBOL(mei_enable_hdcp_authentication);
+/** + * me_close_hdcp_session: + * Function to close the Wired HDCP Tx session of ME FW. + * This also disables the authenticated state of the port. + * + * @data : Intel HW specific Data + * + * Returns 0 on Success, <0 on Failure + */ +int mei_close_hdcp_session(struct mei_hdcp_data *data) +{ + struct wired_cmd_close_session_in session_close_in = { { 0 } }; + struct wired_cmd_close_session_out session_close_out = { { 0 } }; + enum me_hdcp_status status; + struct device *dev; + ssize_t byte; + + if (!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; + + /* Fill header details */ + session_close_in.header.api_version = HDCP_API_VERSION; + session_close_in.header.command_id = WIRED_CLOSE_SESSION; + session_close_in.header.status = ME_HDCP_STATUS_SUCCESS; + session_close_in.header.buffer_len = + WIRED_CMD_BUF_LEN_CLOSE_SESSION_IN; + + /* Fill in the In Data */ + session_close_in.port.integrated_port_type = data->port_type; + session_close_in.port.physical_port = data->port; + + + /* Request to ME */ + byte = mei_cldev_send(data->cldev, (u8 *)&session_close_in, + sizeof(session_close_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 *)&session_close_out, + sizeof(session_close_out)); + if (byte < 0) { + dev_err(dev, "mei_cldev_recv failed. %d\n", (int)byte); + return byte; + } + + status = (enum me_hdcp_status)session_close_out.header.status; + if (status != ME_HDCP_STATUS_SUCCESS) { + dev_err(dev, "Session Close Failed. status: 0x%X\n", status); + return -1; + } + return 0; +} +EXPORT_SYMBOL(mei_close_hdcp_session); + 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 cb8bf3b0f022..031251a1424a 100644 --- a/include/linux/mei_hdcp.h +++ b/include/linux/mei_hdcp.h @@ -129,6 +129,7 @@ mei_repeater_check_flow_prepare_ack(struct mei_hdcp_data *data, int mei_verify_mprime(struct mei_hdcp_data *data, struct hdcp2_rep_stream_ready *stream_ready); int mei_enable_hdcp_authentication(struct mei_hdcp_data *data); +int mei_close_hdcp_session(struct mei_hdcp_data *data); #else static inline int mei_hdcp_cldev_get_reference(void *client_data, @@ -206,5 +207,9 @@ static inline int mei_enable_hdcp_authentication(struct mei_hdcp_data *data) { return -ENODEV; } +static inline int mei_close_hdcp_session(struct mei_hdcp_data *data) +{ + return -ENODEV; +} #endif /* defined (CONFIG_INTEL_MEI_HDCP) */ #endif /* defined (_LINUX_MEI_HDCP_H) */