linux-kernel - [PATCH 05/10] media: uvcvideo: Define Control and GUIDs for class ctrls

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20210311122040.1264410-7-ribalda@chromium.org>
Date:   Thu, 11 Mar 2021 13:20:35 +0100
From:   Ricardo Ribalda <ribalda@...omium.org>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Tomasz Figa <tfiga@...omium.org>, linux-media@...r.kernel.org,
        linux-kernel@...r.kernel.org, senozhatsky@...omium.org
Cc:     Ricardo Ribalda <ribalda@...omium.org>
Subject: [PATCH 05/10] media: uvcvideo: Define Control and GUIDs for class ctrls

Add new bindings for class controls. This controls will be implemented
by a virtual entity.

Signed-off-by: Ricardo Ribalda <ribalda@...omium.org>
---
 drivers/media/usb/uvc/uvc_ctrl.c | 34 ++++++++++++++++++++++++++++++++
 drivers/media/usb/uvc/uvcvideo.h |  8 ++++++++
 2 files changed, 42 insertions(+)

diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c
index 08877897dc5a..fd4d5ad098b9 100644
--- a/drivers/media/usb/uvc/uvc_ctrl.c
+++ b/drivers/media/usb/uvc/uvc_ctrl.c
@@ -355,6 +355,20 @@ static const struct uvc_control_info uvc_ctrls[] = {
 		.flags		= UVC_CTRL_FLAG_GET_CUR
 				| UVC_CTRL_FLAG_AUTO_UPDATE,
 	},
+	{
+		.entity		= UVC_GUID_CTRL_CLASS,
+		.selector	= UVC_CC_CAMERA_CLASS,
+		.index		= 0,
+		.size		= 1,
+		.flags		= 0,
+	},
+	{
+		.entity		= UVC_GUID_CTRL_CLASS,
+		.selector	= UVC_CC_USER_CLASS,
+		.index		= 1,
+		.size		= 1,
+		.flags		= 0,
+	},
 };
 
 static const struct uvc_menu_info power_line_frequency_controls[] = {
@@ -753,6 +767,26 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
 		.v4l2_type	= V4L2_CTRL_TYPE_BOOLEAN,
 		.data_type	= UVC_CTRL_DATA_TYPE_BOOLEAN,
 	},
+	{
+		.id		= V4L2_CID_CAMERA_CLASS,
+		.name		= "Camera Controls",
+		.entity		= UVC_GUID_CTRL_CLASS,
+		.selector	= UVC_CC_CAMERA_CLASS,
+		.size		= 1,
+		.offset		= 0,
+		.v4l2_type	= V4L2_CTRL_TYPE_CTRL_CLASS,
+		.data_type	= UVC_CTRL_DATA_TYPE_BOOLEAN,
+	},
+	{
+		.id		= V4L2_CID_USER_CLASS,
+		.name		= "User Controls",
+		.entity		= UVC_GUID_CTRL_CLASS,
+		.selector	= UVC_CC_USER_CLASS,
+		.size		= 1,
+		.offset		= 0,
+		.v4l2_type	= V4L2_CTRL_TYPE_CTRL_CLASS,
+		.data_type	= UVC_CTRL_DATA_TYPE_BOOLEAN,
+	},
 };
 
 /* ------------------------------------------------------------------------
diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
index 97df5ecd66c9..5792232ed312 100644
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -62,6 +62,9 @@
 #define UVC_GUID_EXT_GPIO_CONTROLLER \
 	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 	 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x03}
+#define UVC_GUID_CTRL_CLASS \
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
+	 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x04}
 
 #define UVC_GUID_FORMAT_MJPEG \
 	{ 'M',  'J',  'P',  'G', 0x00, 0x00, 0x10, 0x00, \
@@ -175,6 +178,11 @@
 	{ 'H',  'E',  'V',  'C', 0x00, 0x00, 0x10, 0x00, \
 	 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 
+/* ------------------------------------------------------------------------
+ * Control Class Constants
+ */
+#define UVC_CC_CAMERA_CLASS	0
+#define UVC_CC_USER_CLASS	1
 
 /* ------------------------------------------------------------------------
  * Driver specific constants.
-- 
2.31.0.rc2.261.g7f71774620-goog