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misc/mei/hdcp: Closing wired HDCP2.2 Tx Session
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] v11: Rebased. 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> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/1550772730-23280-15-git-send-email-ramalingam.c@intel.com
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@ -658,6 +658,59 @@ static int mei_hdcp_enable_authentication(struct device *dev,
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return 0;
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}
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/**
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* mei_hdcp_close_session() - Close the Wired HDCP Tx session of ME FW per port.
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* This also disables the authenticated state of the port.
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* @dev: device corresponding to the mei_cl_device
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* @data: Intel HW specific hdcp data
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*
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* Return: 0 on Success, <0 on Failure
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*/
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static int
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mei_hdcp_close_session(struct device *dev, struct hdcp_port_data *data)
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{
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struct wired_cmd_close_session_in session_close_in = { { 0 } };
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struct wired_cmd_close_session_out session_close_out = { { 0 } };
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struct mei_cl_device *cldev;
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ssize_t byte;
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if (!dev || !data)
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return -EINVAL;
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cldev = to_mei_cl_device(dev);
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session_close_in.header.api_version = HDCP_API_VERSION;
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session_close_in.header.command_id = WIRED_CLOSE_SESSION;
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session_close_in.header.status = ME_HDCP_STATUS_SUCCESS;
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session_close_in.header.buffer_len =
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WIRED_CMD_BUF_LEN_CLOSE_SESSION_IN;
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session_close_in.port.integrated_port_type = data->port_type;
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session_close_in.port.physical_port = mei_get_ddi_index(data->port);
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byte = mei_cldev_send(cldev, (u8 *)&session_close_in,
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sizeof(session_close_in));
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if (byte < 0) {
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dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
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return byte;
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}
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byte = mei_cldev_recv(cldev, (u8 *)&session_close_out,
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sizeof(session_close_out));
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if (byte < 0) {
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dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
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return byte;
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}
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if (session_close_out.header.status != ME_HDCP_STATUS_SUCCESS) {
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dev_dbg(dev, "Session Close Failed. status: 0x%X\n",
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session_close_out.header.status);
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return -EIO;
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}
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return 0;
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}
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static const __attribute__((unused))
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struct i915_hdcp_component_ops mei_hdcp_ops = {
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.owner = THIS_MODULE,
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@ -673,7 +726,7 @@ struct i915_hdcp_component_ops mei_hdcp_ops = {
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mei_hdcp_repeater_check_flow_prepare_ack,
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.verify_mprime = mei_hdcp_verify_mprime,
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.enable_hdcp_authentication = mei_hdcp_enable_authentication,
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.close_hdcp_session = NULL,
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.close_hdcp_session = mei_hdcp_close_session,
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};
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static int mei_hdcp_probe(struct mei_cl_device *cldev,
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