Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=54812c...
Commit: 54812c77bc830e2dbcb62b4c6d8a9c7f97cfdd1b
Parent: 90ac5ea37f91e38d798c5e355232ce7f9c2a24d4
Author: Laurent Pinchart <laurent.pinchart@skynet.be>
AuthorDate: Thu Jul 17 07:37:37 2008 -0300
Committer: Mauro Carvalho Chehab <mchehab@infradead.org>
CommitDate: Sat Jul 26 13:18:25 2008 -0300
V4L/DVB (8498): uvcvideo: Return sensible min and max values when querying a boolean control.
Although the V4L2 spec states that the minimum and maximum fields may not be
valid for control types other than V4L2_CTRL_TYPE_INTEGER, it makes sense
to set the bounds to 0 and 1 for boolean controls instead of returning
uninitialized values.
Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
---
drivers/media/video/uvc/uvc_ctrl.c | 13 ++++++++++++-
1 files changed, 12 insertions(+), 1 deletions(-)
diff --git a/drivers/media/video/uvc/uvc_ctrl.c b/drivers/media/video/uvc/uvc_ctrl.c
index f54d06a..626f4ad 100644
--- a/drivers/media/video/uvc/uvc_ctrl.c
+++ b/drivers/media/video/uvc/uvc_ctrl.c
@@ -592,6 +592,7 @@ int uvc_query_v4l2_ctrl(struct uvc_video_device *video,
if (ctrl == NULL)
return -EINVAL;
+ memset(v4l2_ctrl, 0, sizeof *v4l2_ctrl);
v4l2_ctrl->id = mapping->id;
v4l2_ctrl->type = mapping->v4l2_type;
strncpy(v4l2_ctrl->name, mapping->name, sizeof v4l2_ctrl->name);
@@ -608,7 +609,8 @@ int uvc_query_v4l2_ctrl(struct uvc_video_device *video,
v4l2_ctrl->default_value = uvc_get_le_value(data, mapping);
}
- if (mapping->v4l2_type == V4L2_CTRL_TYPE_MENU) {
+ switch (mapping->v4l2_type) {
+ case V4L2_CTRL_TYPE_MENU:
v4l2_ctrl->minimum = 0;
v4l2_ctrl->maximum = mapping->menu_count - 1;
v4l2_ctrl->step = 1;
@@ -622,6 +624,15 @@ int uvc_query_v4l2_ctrl(struct uvc_video_device *video,
}
return 0;
+
+ case V4L2_CTRL_TYPE_BOOLEAN:
+ v4l2_ctrl->minimum = 0;
+ v4l2_ctrl->maximum = 1;
+ v4l2_ctrl->step = 1;
+ return 0;
+
+ default:
+ break;
}
if (ctrl->info->flags & UVC_CONTROL_GET_MIN) {
--
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