diff options
Diffstat (limited to 'drivers/media/video/em28xx/em28xx-video.c')
| -rw-r--r-- | drivers/media/video/em28xx/em28xx-video.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/media/video/em28xx/em28xx-video.c b/drivers/media/video/em28xx/em28xx-video.c index 9b4557a2f6d0..613300b51a9e 100644 --- a/drivers/media/video/em28xx/em28xx-video.c +++ b/drivers/media/video/em28xx/em28xx-video.c @@ -1070,6 +1070,10 @@ static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, /* the em2800 can only scale down to 50% */ height = height > (3 * maxh / 4) ? maxh : maxh / 2; width = width > (3 * maxw / 4) ? maxw : maxw / 2; + /* MaxPacketSize for em2800 is too small to capture at full resolution + * use half of maxw as the scaler can only scale to 50% */ + if (width == maxw && height == maxh) + width /= 2; } else { /* width must even because of the YUYV format height must be even because of interlacing */ @@ -2503,6 +2507,7 @@ int em28xx_register_analog_devices(struct em28xx *dev) { u8 val; int ret; + unsigned int maxw; printk(KERN_INFO "%s: v4l2 driver version %s\n", dev->name, EM28XX_VERSION); @@ -2515,8 +2520,15 @@ int em28xx_register_analog_devices(struct em28xx *dev) /* Analog specific initialization */ dev->format = &format[0]; + + maxw = norm_maxw(dev); + /* MaxPacketSize for em2800 is too small to capture at full resolution + * use half of maxw as the scaler can only scale to 50% */ + if (dev->board.is_em2800) + maxw /= 2; + em28xx_set_video_format(dev, format[0].fourcc, - norm_maxw(dev), norm_maxh(dev)); + maxw, norm_maxh(dev)); video_mux(dev, dev->ctl_input); |