[media] cx231xx: improve std handling
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>
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@ -992,34 +992,34 @@ static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *norm)
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struct cx231xx_fh *fh = priv;
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struct cx231xx *dev = fh->dev;
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struct v4l2_mbus_framefmt mbus_fmt;
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struct v4l2_format f;
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int rc;
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rc = check_dev(dev);
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if (rc < 0)
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return rc;
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cx231xx_info("vidioc_s_std : 0x%x\n", (unsigned int)*norm);
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if (dev->norm == *norm)
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return 0;
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if (videobuf_queue_is_busy(&fh->vb_vidq))
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return -EBUSY;
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dev->norm = *norm;
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/* Adjusts width/height, if needed */
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f.fmt.pix.width = dev->width;
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f.fmt.pix.height = dev->height;
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vidioc_try_fmt_vid_cap(file, priv, &f);
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dev->width = 720;
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dev->height = (dev->norm & V4L2_STD_625_50) ? 576 : 480;
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call_all(dev, core, s_std, dev->norm);
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/* We need to reset basic properties in the decoder related to
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resolution (since a standard change effects things like the number
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of lines in VACT, etc) */
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v4l2_fill_mbus_format(&mbus_fmt, &f.fmt.pix, V4L2_MBUS_FMT_FIXED);
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memset(&mbus_fmt, 0, sizeof(mbus_fmt));
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mbus_fmt.code = V4L2_MBUS_FMT_FIXED;
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mbus_fmt.width = dev->width;
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mbus_fmt.height = dev->height;
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call_all(dev, video, s_mbus_fmt, &mbus_fmt);
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v4l2_fill_pix_format(&f.fmt.pix, &mbus_fmt);
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/* set new image size */
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dev->width = f.fmt.pix.width;
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dev->height = f.fmt.pix.height;
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/* do mode control overrides */
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cx231xx_do_mode_ctrl_overrides(dev);
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@ -2307,6 +2307,8 @@ int cx231xx_register_analog_devices(struct cx231xx *dev)
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/* Set the initial input */
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video_mux(dev, dev->video_input);
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call_all(dev, core, s_std, dev->norm);
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v4l2_ctrl_handler_init(&dev->ctrl_handler, 10);
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v4l2_ctrl_handler_init(&dev->radio_ctrl_handler, 5);
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