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[media] cx231xx: improve std handling

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Set the initial standard of subdevices instead of leaving it undefined.
Also update the width and height when a new standard is chosen and
return -EBUSY when attempting to change the standard while videobuf is
busy.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil 2013-01-29 10:50:54 -03:00 committed by Mauro Carvalho Chehab
parent 71590765b8
commit d61072a497
1 changed files with 13 additions and 11 deletions
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24
drivers/media/usb/cx231xx/cx231xx-video.c
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@ -992,34 +992,34 @@ static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *norm)
struct cx231xx_fh *fh = priv;
struct cx231xx *dev = fh->dev;
struct v4l2_mbus_framefmt mbus_fmt;
struct v4l2_format f;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
cx231xx_info("vidioc_s_std : 0x%x\n", (unsigned int)*norm);
if (dev->norm == *norm)
return 0;
if (videobuf_queue_is_busy(&fh->vb_vidq))
return -EBUSY;
dev->norm = *norm;
/* Adjusts width/height, if needed */
f.fmt.pix.width = dev->width;
f.fmt.pix.height = dev->height;
vidioc_try_fmt_vid_cap(file, priv, &f);
dev->width = 720;
dev->height = (dev->norm & V4L2_STD_625_50) ? 576 : 480;
call_all(dev, core, s_std, dev->norm);
/* We need to reset basic properties in the decoder related to
resolution (since a standard change effects things like the number
of lines in VACT, etc) */
v4l2_fill_mbus_format(&mbus_fmt, &f.fmt.pix, V4L2_MBUS_FMT_FIXED);
memset(&mbus_fmt, 0, sizeof(mbus_fmt));
mbus_fmt.code = V4L2_MBUS_FMT_FIXED;
mbus_fmt.width = dev->width;
mbus_fmt.height = dev->height;
call_all(dev, video, s_mbus_fmt, &mbus_fmt);
v4l2_fill_pix_format(&f.fmt.pix, &mbus_fmt);
/* set new image size */
dev->width = f.fmt.pix.width;
dev->height = f.fmt.pix.height;
/* do mode control overrides */
cx231xx_do_mode_ctrl_overrides(dev);
@ -2307,6 +2307,8 @@ int cx231xx_register_analog_devices(struct cx231xx *dev)
/* Set the initial input */
video_mux(dev, dev->video_input);
call_all(dev, core, s_std, dev->norm);
v4l2_ctrl_handler_init(&dev->ctrl_handler, 10);
v4l2_ctrl_handler_init(&dev->radio_ctrl_handler, 5);