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]
Signed-off-by: Ramalingam C <ramalingam.c@xxxxxxxxx>
---
drivers/misc/mei/hdcp/mei_hdcp.c | 56 ++++++++++++++++++++++++++++++++++++++++
include/linux/mei_hdcp.h | 7 +++++
2 files changed, 63 insertions(+)
diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c
index cbd3a8a3ae3e..34292e279f8a 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -682,6 +682,62 @@ int mei_enable_hdcp_authentication(struct mei_cl_device *cldev,
}
EXPORT_SYMBOL(mei_enable_hdcp_authentication);
+/*
+ * mei_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_cl_device *cldev,
+ 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 } };
+ struct device *dev;
+ ssize_t byte;
+
+ if (!data)
+ return -EINVAL;
+
+ dev = &cldev->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 = 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;
+}
+EXPORT_SYMBOL(mei_close_hdcp_session);
+
static void
mei_cldev_state_notify_clients(struct mei_cl_device *cldev, bool enabled)
{
diff --git a/include/linux/mei_hdcp.h b/include/linux/mei_hdcp.h
index e6b6f9ace0c2..43bd81488a3a 100644
--- a/include/linux/mei_hdcp.h
+++ b/include/linux/mei_hdcp.h
@@ -139,6 +139,8 @@ int mei_verify_mprime(struct mei_cl_device *cldev, struct mei_hdcp_data *data,
struct hdcp2_rep_stream_ready *stream_ready);
int mei_enable_hdcp_authentication(struct mei_cl_device *cldev,
struct mei_hdcp_data *data);
+int mei_close_hdcp_session(struct mei_cl_device *cldev,
+ struct mei_hdcp_data *data);
#else
static inline int mei_cldev_register_notify(struct notifier_block *nb)
{
@@ -221,5 +223,10 @@ static inline int mei_enable_hdcp_authentication(struct mei_cl_device *cldev,
{
return -ENODEV;
}
+static inline int mei_close_hdcp_session(struct mei_cl_device *cldev,
+ struct mei_hdcp_data *data)
+{
+ return -ENODEV;
+}
#endif /* IS_ENABLED(CONFIG_INTEL_MEI_HDCP) */
#endif /* defined (_LINUX_MEI_HDCP_H) */
--
2.7.4
_______________________________________________
dri-devel mailing list
dri-devel@xxxxxxxxxxxxxxxxxxxxx
https://lists.freedesktop.org/mailman/listinfo/dri-devel
