On Wednesday 09 May 2018 07:32 PM, Shankar, Uma wrote:
-----Original Message-----
From: Intel-gfx [mailto:intel-gfx-bounces@xxxxxxxxxxxxxxxxxxxxx] On Behalf Of
Ramalingam C
Sent: Tuesday, April 3, 2018 7:28 PM
To: intel-gfx@xxxxxxxxxxxxxxxxxxxxx; dri-devel@xxxxxxxxxxxxxxxxxxxxx;
seanpaul@xxxxxxxxxxxx; daniel@xxxxxxxx; chris@xxxxxxxxxxxxxxxxxx;
jani.nikula@xxxxxxxxxxxxxxx; Winkler, Tomas <tomas.winkler@xxxxxxxxx>;
Usyskin, Alexander <alexander.usyskin@xxxxxxxxx>
Cc: Vivi, Rodrigo <rodrigo.vivi@xxxxxxxxx>
Subject: [Intel-gfx] [PATCH v3 18/40] 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]
Signed-off-by: Ramalingam C <ramalingam.c@xxxxxxxxx>
---
drivers/misc/mei/hdcp/mei_hdcp.c | 55
++++++++++++++++++++++++++++++++++++++++
include/linux/mei_hdcp.h | 7 +++++
2 files changed, 62 insertions(+)
diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c
b/drivers/misc/mei/hdcp/mei_hdcp.c
index b5d1da41f1d9..ed402f1f2f64 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -686,6 +686,61 @@ int mei_enable_hdcp_authentication(struct
mei_cl_device *cldev, } EXPORT_SYMBOL(mei_enable_hdcp_authentication);
+/**
+ * me_close_hdcp_session:
Typo in me. Should be mei.
Thank you for catching it.
--Ram
+ * 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. %d\n", (int)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. %d\n", (int)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 -1;
+ }
+ return 0;
+}
+EXPORT_SYMBOL(mei_close_hdcp_session);
+
void mei_cldev_state_notify_clients(struct mei_cl_device *cldev, bool enabled) {
if (enabled)
diff --git a/include/linux/mei_hdcp.h b/include/linux/mei_hdcp.h index
2366d0741abe..55cbde890571 100644
--- a/include/linux/mei_hdcp.h
+++ b/include/linux/mei_hdcp.h
@@ -138,6 +138,8 @@ 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 int mei_cldev_register_notify(struct notifier_block *nb) { @@ -216,5
+218,10 @@ 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 /* defined (CONFIG_INTEL_MEI_HDCP) */ #endif /* defined
(_LINUX_MEI_HDCP_H) */
--
2.7.4
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