1. Add a short ducumentation for MEI HDCP driver,
and fix DOC comments in drivers/misc/mei/hdcp/mei_hdcp.c
Signed-off-by: Tomas Winkler <tomas.winkler@xxxxxxxxx>
---
Documentation/driver-api/mei/hdcp.rst | 32 +++++++++++++++++++
.../driver-api/mei/mei-client-bus.rst | 1 +
drivers/misc/mei/hdcp/mei_hdcp.c | 11 +++----
3 files changed, 37 insertions(+), 7 deletions(-)
create mode 100644 Documentation/driver-api/mei/hdcp.rst
diff --git a/Documentation/driver-api/mei/hdcp.rst b/Documentation/driver-api/mei/hdcp.rst
new file mode 100644
index 000000000000..e85a065b1cdc
--- /dev/null
+++ b/Documentation/driver-api/mei/hdcp.rst
@@ -0,0 +1,32 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+HDCP:
+=====
+
+ME FW as a security engine provides the capability for setting up
+HDCP2.2 protocol negotiation between the Intel graphics device and
+an HDC2.2 sink.
+
+ME FW prepares HDCP2.2 negotiation parameters, signs and encrypts them
+according the HDCP 2.2 spec. The Intel graphics sends the created blob
+to the HDCP2.2 sink.
+
+Similarly, the HDCP2.2 sink's response is transferred to ME FW
+for decryption and verification.
+
+Once all the steps of HDCP2.2 negotiation are completed,
+upon request ME FW will configure the port as authenticated and supply
+the HDCP encryption keys to Intel graphics hardware.
+
+
+mei_hdcp driver
+---------------
+.. kernel-doc:: drivers/misc/mei/hdcp/mei_hdcp.c
+ :doc: MEI_HDCP Client Driver
+
+mei_hdcp api
+------------
+
+.. kernel-doc:: drivers/misc/mei/hdcp/mei_hdcp.c
+ :functions:
+
diff --git a/Documentation/driver-api/mei/mei-client-bus.rst b/Documentation/driver-api/mei/mei-client-bus.rst
index bfe28ebc3ca8..f242b3f8d6aa 100644
--- a/Documentation/driver-api/mei/mei-client-bus.rst
+++ b/Documentation/driver-api/mei/mei-client-bus.rst
@@ -164,4 +164,5 @@ MEI Client Bus Drivers
.. toctree::
:maxdepth: 2
+ hdcp
nfc
diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c
index b07000202d4a..ed816939fb32 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -2,7 +2,7 @@
/*
* Copyright © 2019 Intel Corporation
*
- * Mei_hdcp.c: HDCP client driver for mei bus
+ * mei_hdcp.c: HDCP client driver for mei bus
*
* Author:
* Ramalingam C <ramalingam.c@xxxxxxxxx>
@@ -11,12 +11,9 @@
/**
* DOC: MEI_HDCP Client Driver
*
- * This is a client driver to the mei_bus to make the HDCP2.2 services of
- * ME FW available for the interested consumers like I915.
- *
- * This module will act as a translation layer between HDCP protocol
- * implementor(I915) and ME FW by translating HDCP2.2 authentication
- * messages to ME FW command payloads and vice versa.
+ * The mei_hdcp driver acts as a translation layer between HDCP 2.2
+ * protocol implementer (I915) and ME FW by translating HDCP2.2
+ * negotiation messages to ME FW command payloads and vice versa.
*/
#include <linux/module.h>
--
2.20.1
