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:
No change.
v7:
Collected the Rb-ed by.
Rebased.
v8:
Adjust to the new mei interface.
Fix for Kdoc.
Signed-off-by: Ramalingam C <ramalingam.c@xxxxxxxxx>
Reviewed-by: Uma Shankar <uma.shankar@xxxxxxxxx>
---
drivers/misc/mei/hdcp/mei_hdcp.c | 57 +++++++++++++++++++++++++++++++++++++++-
1 file changed, 56 insertions(+), 1 deletion(-)
diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c
index 08f7310edd68..6e14e7cb49a5 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -650,6 +650,61 @@ static int mei_enable_hdcp_authentication(struct device *dev, void *hdcp_data)
return 0;
}
+/*
+ * mei_close_hdcp_session :
+ * Function to close the Wired HDCP Tx session of ME FW.
+ * This also disables the authenticated state of the port.
+ *
+ * @dev : device corresponding to the mei_cl_device
+ * @hdcp_data : Intel HW specific hdcp data
+ *
+ * Returns 0 on Success, <0 on Failure
+ */
+static int mei_close_hdcp_session(struct device *dev, void *hdcp_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;
+ struct mei_hdcp_data *data = hdcp_data;
+ 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 = 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,
@@ -663,7 +718,7 @@ struct i915_hdcp_component_ops mei_hdcp_ops = {
.repeater_check_flow_prepare_ack = mei_repeater_check_flow_prepare_ack,
.verify_mprime = mei_verify_mprime,
.enable_hdcp_authentication = mei_enable_hdcp_authentication,
- .close_hdcp_session = NULL,
+ .close_hdcp_session = mei_close_hdcp_session,
};
static int mei_hdcp_probe(struct mei_cl_device *cldev,
--
2.7.4
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