V4L/DVB (4264): Cx88-blackbird: implement VIDIOC_QUERYCTRL and VIDIOC_QUERYMENU
This patch implements the newer v4l2 control features to make the
standard user controls and mpeg encoder controls of cx88-blackbird
video encoder boards available to userspace.
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/video/cx88/cx88-blackbird.c b/drivers/media/video/cx88/cx88-blackbird.c
index 4ff8158..349632b 100644
--- a/drivers/media/video/cx88/cx88-blackbird.c
+++ b/drivers/media/video/cx88/cx88-blackbird.c
@@ -686,6 +686,39 @@
/* ------------------------------------------------------------------ */
+static const u32 *ctrl_classes[] = {
+ cx88_user_ctrls,
+ cx2341x_mpeg_ctrls,
+ NULL
+};
+
+static int blackbird_queryctrl(struct cx8802_dev *dev, struct v4l2_queryctrl *qctrl)
+{
+ qctrl->id = v4l2_ctrl_next(ctrl_classes, qctrl->id);
+ if (qctrl->id == 0)
+ return -EINVAL;
+
+ /* Standard V4L2 controls */
+ if (cx8800_ctrl_query(qctrl) == 0)
+ return 0;
+
+ /* MPEG V4L2 controls */
+ if (cx2341x_ctrl_query(&dev->params, qctrl))
+ qctrl->flags |= V4L2_CTRL_FLAG_DISABLED;
+ return 0;
+}
+
+static int blackbird_querymenu(struct cx8802_dev *dev, struct v4l2_querymenu *qmenu)
+{
+ struct v4l2_queryctrl qctrl;
+
+ qctrl.id = qmenu->id;
+ blackbird_queryctrl(dev, &qctrl);
+ return v4l2_ctrl_query_menu(qmenu, &qctrl, cx2341x_ctrl_get_menu(qmenu->id));
+}
+
+/* ------------------------------------------------------------------ */
+
static int mpeg_do_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, void *arg)
{
@@ -866,6 +899,16 @@
core->name);
return 0;
}
+ case VIDIOC_QUERYMENU:
+ return blackbird_querymenu(dev, arg);
+ case VIDIOC_QUERYCTRL:
+ {
+ struct v4l2_queryctrl *c = arg;
+
+ if (blackbird_queryctrl(dev, c) == 0)
+ return 0;
+ return cx88_do_ioctl(inode, file, 0, dev->core, cmd, arg, mpeg_do_ioctl);
+ }
default:
return cx88_do_ioctl(inode, file, 0, dev->core, cmd, arg, mpeg_do_ioctl);