From: Hans Verkuil <hans.verkuil@cisco.com>
Date: Mon, 23 May 2011 07:07:05 +0000 (-0300)
Subject: [media] v4l2-ctrls: add new bitmask control type
X-Git-Tag: v3.1-rc1~116^2~148
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=commitdiff_plain;h=fa4d7096d1fb7c012ebaacefee132007a21e0965

[media] v4l2-ctrls: add new bitmask control type

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Sakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
---

diff --git a/drivers/media/video/v4l2-common.c b/drivers/media/video/v4l2-common.c
index 06b9f9f82013..5c6100fb4072 100644
--- a/drivers/media/video/v4l2-common.c
+++ b/drivers/media/video/v4l2-common.c
@@ -105,6 +105,9 @@ int v4l2_ctrl_check(struct v4l2_ext_control *ctrl, struct v4l2_queryctrl *qctrl,
 		    menu_items[ctrl->value][0] == '\0')
 			return -EINVAL;
 	}
+	if (qctrl->type == V4L2_CTRL_TYPE_BITMASK &&
+			(ctrl->value & ~qctrl->maximum))
+		return -ERANGE;
 	return 0;
 }
 EXPORT_SYMBOL(v4l2_ctrl_check);
diff --git a/drivers/media/video/v4l2-ctrls.c b/drivers/media/video/v4l2-ctrls.c
index 0e8a28f37af9..86554b5cdca0 100644
--- a/drivers/media/video/v4l2-ctrls.c
+++ b/drivers/media/video/v4l2-ctrls.c
@@ -805,6 +805,10 @@ static int validate_new_int(const struct v4l2_ctrl *ctrl, s32 *pval)
 			return -EINVAL;
 		return 0;
 
+	case V4L2_CTRL_TYPE_BITMASK:
+		*pval &= ctrl->maximum;
+		return 0;
+
 	case V4L2_CTRL_TYPE_BUTTON:
 	case V4L2_CTRL_TYPE_CTRL_CLASS:
 		*pval = 0;
@@ -825,6 +829,7 @@ static int validate_new(const struct v4l2_ctrl *ctrl, struct v4l2_ext_control *c
 	case V4L2_CTRL_TYPE_INTEGER:
 	case V4L2_CTRL_TYPE_BOOLEAN:
 	case V4L2_CTRL_TYPE_MENU:
+	case V4L2_CTRL_TYPE_BITMASK:
 	case V4L2_CTRL_TYPE_BUTTON:
 	case V4L2_CTRL_TYPE_CTRL_CLASS:
 		return validate_new_int(ctrl, &c->value);
@@ -1063,13 +1068,17 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
 
 	/* Sanity checks */
 	if (id == 0 || name == NULL || id >= V4L2_CID_PRIVATE_BASE ||
-	    max < min ||
 	    (type == V4L2_CTRL_TYPE_INTEGER && step == 0) ||
+	    (type == V4L2_CTRL_TYPE_BITMASK && max == 0) ||
 	    (type == V4L2_CTRL_TYPE_MENU && qmenu == NULL) ||
 	    (type == V4L2_CTRL_TYPE_STRING && max == 0)) {
 		handler_set_err(hdl, -ERANGE);
 		return NULL;
 	}
+	if (type != V4L2_CTRL_TYPE_BITMASK && max < min) {
+		handler_set_err(hdl, -ERANGE);
+		return NULL;
+	}
 	if ((type == V4L2_CTRL_TYPE_INTEGER ||
 	     type == V4L2_CTRL_TYPE_MENU ||
 	     type == V4L2_CTRL_TYPE_BOOLEAN) &&
@@ -1077,6 +1086,10 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
 		handler_set_err(hdl, -ERANGE);
 		return NULL;
 	}
+	if (type == V4L2_CTRL_TYPE_BITMASK && ((def & ~max) || min || step)) {
+		handler_set_err(hdl, -ERANGE);
+		return NULL;
+	}
 
 	if (type == V4L2_CTRL_TYPE_BUTTON)
 		flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
@@ -1357,6 +1370,9 @@ static void log_ctrl(const struct v4l2_ctrl *ctrl,
 	case V4L2_CTRL_TYPE_MENU:
 		printk(KERN_CONT "%s", ctrl->qmenu[ctrl->cur.val]);
 		break;
+	case V4L2_CTRL_TYPE_BITMASK:
+		printk(KERN_CONT "0x%08x", ctrl->cur.val);
+		break;
 	case V4L2_CTRL_TYPE_INTEGER64:
 		printk(KERN_CONT "%lld", ctrl->cur.val64);
 		break;
diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
index f002006fc0a9..148d1a51ca22 100644
--- a/include/linux/videodev2.h
+++ b/include/linux/videodev2.h
@@ -1040,6 +1040,7 @@ enum v4l2_ctrl_type {
 	V4L2_CTRL_TYPE_INTEGER64     = 5,
 	V4L2_CTRL_TYPE_CTRL_CLASS    = 6,
 	V4L2_CTRL_TYPE_STRING        = 7,
+	V4L2_CTRL_TYPE_BITMASK       = 8,
 };
 
 /*  Used in the VIDIOC_QUERYCTRL ioctl for querying controls */