On Wednesday 14 February 2018 08:24 PM, Winkler, Tomas wrote:
ME FW is contributes a vital role in HDCP2.2 authentication.
HDCP2.2 driver needs to communicate to ME FW for each step of the
HDCP2.2 authentication.

ME FW prepare and HDCP2.2 authentication  parameters and encrypt them
as per spec. With such parameter Driver prepares HDCP2.2 auth messages
and communicate with HDCP2.2 sink.

Similarly HDCP2. sink's response is shared with ME FW for decrypt and
verification.

Once All the steps of HDCP2.2 authentications are complete on driver's
request ME FW will configure the port as authenticated and supply the HDCP
keys to the Gen HW for encryption.

Only after this stage HDCP2.2 driver can start the HDCP2.2 encryption for a
port.

ME FW is interfaced to kernel through MEI Bus Driver. To obtain the
HDCP2.2 services from the ME FW through MEI Bus driver MEI Client Driver is
developed.

Signed-off-by: Ramalingam C <ramalinga...@intel.com>
Signed-off-by: Tomas Winkler <tomas.wink...@intel.com>
---
  drivers/misc/mei/mei_hdcp.c | 80
+++++++++++++++++++++++++++++++++++++++++++++
  drivers/misc/mei/mei_hdcp.h | 32 ++++++++++++++++++
  2 files changed, 112 insertions(+)
  create mode 100644 drivers/misc/mei/mei_hdcp.c  create mode 100644
drivers/misc/mei/mei_hdcp.h

diff --git a/drivers/misc/mei/mei_hdcp.c b/drivers/misc/mei/mei_hdcp.c new
file mode 100644 index 000000000000..aa211763e520
--- /dev/null
+++ b/drivers/misc/mei/mei_hdcp.c
This should go under 'drivers/misc/mei/hdcp/' we don't want more code directly 
under mei
Thanks for the review Tomas.
Sure I will move it.

--Ram


@@ -0,0 +1,80 @@
+/*
+ * Copyright © 2017 Intel Corporation
+ *
+ * Mei_hdcp.c: client driver for mei bus driver
+ *
+ * Permission is hereby granted, free of charge, to any person
+obtaining a
+ * copy of this software and associated documentation files (the
+"Software"),
+ * to deal in the Software without restriction, including without
+limitation
+ * the rights to use, copy, modify, merge, publish, distribute,
+sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom
+the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+next
+ * paragraph) shall be included in all copies or substantial portions
+of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO
EVENT
+SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
DAMAGES OR
+OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ *     Ramalingam C <ramalinga...@intel.com>
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/uuid.h>
+
+#include "mei_hdcp.h"
+
+struct mei_hdcp mei_hdcp;
+
+static int mei_hdcp_probe(struct mei_cl_device *cldev,
+                         const struct mei_cl_device_id *id) {
+       int ret;
+
+       mei_hdcp.cldev = cldev;
+       mei_cldev_set_drvdata(cldev, &mei_hdcp);
+
+       ret = mei_cldev_enable(cldev);
+       if (ret < 0)
+               dev_err(&cldev->dev, "mei_cldev_enable Failed. %d\n", ret);
+
+       return ret;
+}
+
+static int mei_hdcp_remove(struct mei_cl_device *cldev) {
+       mei_cldev_disable(cldev);
+       return 0;
+}
+
+#define WIDI_HECI_CLIENT_GUID  UUID_LE(0xB638AB7E, 0x94E2,
0x4EA2, 0xA5, \
+                                       0x52, 0xD1, 0xC5, 0x4B, \
+                                       0x62, 0x7F, 0x04)
+#define MEI_HDCP2_2_UUID       WIDI_HECI_CLIENT_GUID
+
+static struct mei_cl_device_id mei_hdcp_tbl[] = {
+       { .uuid = MEI_HDCP2_2_UUID, .version = MEI_CL_VERSION_ANY },
+       { }
+};
+MODULE_DEVICE_TABLE(mei, mei_hdcp_tbl);
+
+static struct mei_cl_driver mei_hdcp_driver = {
+       .id_table       = mei_hdcp_tbl,
+       .name           = KBUILD_MODNAME,
+       .probe          = mei_hdcp_probe,
+       .remove         = mei_hdcp_remove,
+};
+
+module_mei_cl_driver(mei_hdcp_driver);
+
+MODULE_AUTHOR("Intel Corporation");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("HDCP");
diff --git a/drivers/misc/mei/mei_hdcp.h b/drivers/misc/mei/mei_hdcp.h
new file mode 100644 index 000000000000..c06c0d767c4f
--- /dev/null
+++ b/drivers/misc/mei/mei_hdcp.h
@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2017 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person
+obtaining a
+ * copy of this software and associated documentation files (the
+"Software"),
+ * to deal in the Software without restriction, including without
+limitation
+ * the rights to use, copy, modify, merge, publish, distribute,
+sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom
+the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+next
+ * paragraph) shall be included in all copies or substantial portions
+of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO
EVENT
+SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
DAMAGES OR
+OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER
+DEALINGS
+ * IN THE SOFTWARE.
+ */
+#ifndef __MEI_HDCP_H__
+#define __MEI_HDCP_H__
+
+#include <linux/mei_cl_bus.h>
+
+struct mei_hdcp {
+       struct mei_cl_device *cldev;
+};
+
+#endif /* __MEI_HDCP_H__ */
--
2.7.4

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