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. v3: cldev is passed as first parameter [Tomas] Redundant comments and cast are removed [Tomas] v4: %zd for ssize_t [Alexander] %s/return -1/return -EIO [Alexander] Style and typos fixed [Uma] v5: Extra line is removed. v6: Collected the Rb-ed by. Rebased. v7: Adjust to the new mei interface. Fix for Kdoc. v8: K-Doc addition.[Tomas] v9: renamed func as mei_hdcp_* [Tomas] Inline function is defined for DDI index [Tomas] v10: K-Doc fix. [Tomas]
Signed-off-by: Ramalingam C ramalingam.c@intel.com Reviewed-by: Uma Shankar uma.shankar@intel.com Acked-by: Tomas Winkler tomas.winkler@intel.com --- drivers/misc/mei/hdcp/mei_hdcp.c | 55 +++++++++++++++++++++++++++++++++++++++- 1 file changed, 54 insertions(+), 1 deletion(-)
diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c index d8e04e0621a1..2afc7d31dacc 100644 --- a/drivers/misc/mei/hdcp/mei_hdcp.c +++ b/drivers/misc/mei/hdcp/mei_hdcp.c @@ -658,6 +658,59 @@ static int mei_hdcp_enable_authentication(struct device *dev, return 0; }
+/** + * mei_hdcp_close_session() - Close the Wired HDCP Tx session of ME FW per port. + * This also disables the authenticated state of the port. + * @dev: device corresponding to the mei_cl_device + * @data: Intel HW specific hdcp data + * + * Return: 0 on Success, <0 on Failure + */ +static int +mei_hdcp_close_session(struct device *dev, struct hdcp_port_data *data) +{ + struct wired_cmd_close_session_in session_close_in = { { 0 } }; + struct wired_cmd_close_session_out session_close_out = { { 0 } }; + struct mei_cl_device *cldev; + ssize_t byte; + + if (!dev || !data) + return -EINVAL; + + cldev = to_mei_cl_device(dev); + + 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; + + session_close_in.port.integrated_port_type = data->port_type; + session_close_in.port.physical_port = mei_get_ddi_index(data->port); + + byte = mei_cldev_send(cldev, (u8 *)&session_close_in, + sizeof(session_close_in)); + if (byte < 0) { + dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte); + return byte; + } + + byte = mei_cldev_recv(cldev, (u8 *)&session_close_out, + sizeof(session_close_out)); + if (byte < 0) { + dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte); + return byte; + } + + if (session_close_out.header.status != ME_HDCP_STATUS_SUCCESS) { + dev_dbg(dev, "Session Close Failed. status: 0x%X\n", + session_close_out.header.status); + return -EIO; + } + + return 0; +} + static __attribute__((unused)) struct i915_hdcp_component_ops mei_hdcp_ops = { .owner = THIS_MODULE, @@ -673,7 +726,7 @@ struct i915_hdcp_component_ops mei_hdcp_ops = { mei_hdcp_repeater_check_flow_prepare_ack, .verify_mprime = mei_hdcp_verify_mprime, .enable_hdcp_authentication = mei_hdcp_enable_authentication, - .close_hdcp_session = NULL, + .close_hdcp_session = mei_hdcp_close_session, };
static int mei_hdcp_probe(struct mei_cl_device *cldev,