[Intel-gfx] [RFC v2] drm/hdcp: drm enum property for HDCP State

[Ramalingam C]

DRM connector property is created to represent the content protection
state of the connector and to configure the same.

CP States defined:
	DRM_CP_UNSUPPORTED 	- CP is not supported
	DRM_CP_DISABLE		- CP is disabled
	DRM_CP_ENABLE		- CP is enabled

V2: Redesigned the property to match with CP needs of CrOS.

Signed-off-by: Ramalingam C <ramalingam.c at intel.com>
---
 drivers/gpu/drm/drm_connector.c | 14 +++++++++++++
 include/drm/drm_hdcp.h          | 44 +++++++++++++++++++++++++++++++++++++++++
 include/drm/drm_mode_config.h   |  5 +++++
 3 files changed, 63 insertions(+)
 create mode 100644 include/drm/drm_hdcp.h

diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index 5cd61af..64895fb 100644
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -24,6 +24,7 @@
 #include <drm/drm_connector.h>
 #include <drm/drm_edid.h>
 #include <drm/drm_encoder.h>
+#include <drm/drm_hdcp.h>
 
 #include "drm_crtc_internal.h"
 #include "drm_internal.h"
@@ -617,6 +618,13 @@ static const struct drm_prop_enum_list drm_link_status_enum_list[] = {
 };
 DRM_ENUM_NAME_FN(drm_get_link_status_name, drm_link_status_enum_list)
 
+static const struct drm_prop_enum_list drm_cp_enum_list[] = {
+	{ DRM_CP_UNSUPPORTED,	"CP Not Supported" },
+	{ DRM_CP_DISABLE,	"Disable CP" },
+	{ DRM_CP_ENABLE,	"Enable CP for Type0 content" },
+};
+DRM_ENUM_NAME_FN(drm_get_cp_status_name, drm_cp_enum_list)
+
 /**
  * drm_display_info_set_bus_formats - set the supported bus formats
  * @info: display info to store bus formats in
@@ -789,6 +797,12 @@ int drm_connector_create_standard_properties(struct drm_device *dev)
 		return -ENOMEM;
 	dev->mode_config.link_status_property = prop;
 
+	prop = drm_property_create_enum(dev, 0, "cp", drm_cp_enum_list,
+					   ARRAY_SIZE(drm_cp_enum_list));
+	if (!prop)
+		return -ENOMEM;
+	dev->mode_config.cp_property = prop;
+
 	return 0;
 }
 
diff --git a/include/drm/drm_hdcp.h b/include/drm/drm_hdcp.h
new file mode 100644
index 0000000..f6d0160
--- /dev/null
+++ b/include/drm/drm_hdcp.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2017 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.
+ */
+
+/*
+ * Header for HDCP specific data
+ */
+
+#ifndef __DRM_HDCP_H__
+#define __DRM_HDCP_H__
+
+/**
+ * CP property related information
+ */
+enum drm_cp_state {
+
+	/* HDCP sink and Src dont have any common HDCP ver supported */
+	DRM_CP_UNSUPPORTED,
+
+	/* Disable Content Protection */
+	DRM_CP_DISABLE,
+
+	/* Enable Content Protection */
+	DRM_CP_ENABLE,
+};
+#endif	/* __DRM_HDCP_H__ */
diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h
index 4298171..7acb8b2 100644
--- a/include/drm/drm_mode_config.h
+++ b/include/drm/drm_mode_config.h
@@ -538,6 +538,11 @@ struct drm_mode_config {
 	 */
 	struct drm_property *link_status_property;
 	/**
+	 * @cp_property: Default connector property for CP
+	 * of a connector
+	 */
+	struct drm_property *cp_property;
+	/**
 	 * @plane_type_property: Default plane property to differentiate
 	 * CURSOR, PRIMARY and OVERLAY legacy uses of planes.
 	 */
-- 
2.7.4