drivers/misc/mei/hdcp/mei_hdcp.c | 36 +++++++++++++++++++++++++++---
include/linux/mei_hdcp.h | 48
++++++++++++++++++++++++++++++++++++++++
2 files changed, 81 insertions(+), 3 deletions(-)
create mode 100644 include/linux/mei_hdcp.h
diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c
b/drivers/misc/mei/hdcp/mei_hdcp.c
index b334615728a7..2811a25f8c57 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -31,6 +31,32 @@
#include <linux/slab.h>
#include <linux/uuid.h>
#include <linux/mei_cl_bus.h>
+#include <linux/notifier.h>
+#include <linux/mei_hdcp.h>
+
+static BLOCKING_NOTIFIER_HEAD(mei_cldev_notifier_list);
+
+void mei_cldev_state_notify_clients(struct mei_cl_device *cldev, bool
enabled)
+{
+ if (enabled)
+ blocking_notifier_call_chain(&mei_cldev_notifier_list,
+ MEI_CLDEV_ENABLED, cldev);
+ else
+ blocking_notifier_call_chain(&mei_cldev_notifier_list,
+ MEI_CLDEV_DISABLED, NULL);
+}
+
+int mei_cldev_register_notify(struct notifier_block *nb)
+{
+ return blocking_notifier_chain_register(&mei_cldev_notifier_list,
nb);
+}
+EXPORT_SYMBOL_GPL(mei_cldev_register_notify);
+
+int mei_cldev_unregister_notify(struct notifier_block *nb)
+{
+ return blocking_notifier_chain_unregister(&mei_cldev_notifier_list,
nb);
+}
+EXPORT_SYMBOL_GPL(mei_cldev_unregister_notify);
static int mei_hdcp_probe(struct mei_cl_device *cldev,
const struct mei_cl_device_id *id)
@@ -38,14 +64,18 @@ static int mei_hdcp_probe(struct mei_cl_device
*cldev,
int ret;
ret = mei_cldev_enable(cldev);
- if (ret < 0)
+ if (ret < 0) {
dev_err(&cldev->dev, "mei_cldev_enable Failed. %d\n", ret);
+ return ret;
+ }
- return ret;
+ mei_cldev_state_notify_clients(cldev, true);
+ return 0;
}
static int mei_hdcp_remove(struct mei_cl_device *cldev)
{
+ mei_cldev_state_notify_clients(cldev, false);
mei_cldev_set_drvdata(cldev, NULL);
return mei_cldev_disable(cldev);
}
@@ -71,4 +101,4 @@ module_mei_cl_driver(mei_hdcp_driver);
MODULE_AUTHOR("Intel Corporation");
MODULE_LICENSE("Dual BSD/GPL");
-MODULE_DESCRIPTION("HDCP");
+MODULE_DESCRIPTION("MEI HDCP");
diff --git a/include/linux/mei_hdcp.h b/include/linux/mei_hdcp.h
new file mode 100644
index 000000000000..3b46bebde718
--- /dev/null
+++ b/include/linux/mei_hdcp.h
@@ -0,0 +1,48 @@
+/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */
+/*
+ * Copyright © 2017-2018 Intel Corporation
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided
that
+ * the above copyright notice appear in all copies and that both that
copyright
+ * notice and this permission notice appear in supporting documentation,
and
+ * that the name of the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission. The copyright holders make no representations
+ * about the suitability of this software for any purpose. It is provided "as
+ * is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO
THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS, IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL,
INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE
OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ *
+ * Authors:
+ * Ramalingam C <ramalingam.c@xxxxxxxxx>
+ */
+
+#ifndef _LINUX_MEI_HDCP_H
+#define _LINUX_MEI_HDCP_H
+
+enum mei_cldev_state {
+ MEI_CLDEV_DISABLED,
+ MEI_CLDEV_ENABLED
+};
+
+#ifdef CONFIG_INTEL_MEI_HDCP
+int mei_cldev_register_notify(struct notifier_block *nb);
+int mei_cldev_unregister_notify(struct notifier_block *nb);
+#else
+static int mei_cldev_register_notify(struct notifier_block *nb)
+{
+ return -ENODEV;
+}
+static int mei_cldev_unregister_notify(struct notifier_block *nb)
+{
+ return -ENODEV;
+}
+#endif /* defined (CONFIG_INTEL_MEI_HDCP) */
+#endif /* defined (_LINUX_MEI_HDCP_H) */
--
2.7.4
