diff options
| author | Frank Schaefer | 2014-01-17 14:18:43 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab | 2014-03-14 10:17:18 -0300 |
| commit | ba35ca07080268af1badeb47de0f9eff28126339 (patch) | |
| tree | 06e248461b91a1a09550c5963588b5e6b74466e8 /drivers/media | |
| parent | 22a5ea91df52392f98ff7ff66a1dce2c07e68568 (diff) | |
[media] em28xx-audio: make sure audio is unmuted on open()
In all cases, when the first capture is called, we need to
call the code that unmutes the volume.
Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/usb/em28xx/em28xx-audio.c | 42 |
1 files changed, 22 insertions, 20 deletions
diff --git a/drivers/media/usb/em28xx/em28xx-audio.c b/drivers/media/usb/em28xx/em28xx-audio.c index f75c0a5494d6..c1937ea1fca3 100644 --- a/drivers/media/usb/em28xx/em28xx-audio.c +++ b/drivers/media/usb/em28xx/em28xx-audio.c @@ -273,26 +273,28 @@ static int snd_em28xx_capture_open(struct snd_pcm_substream *substream) mutex_lock(&dev->lock); runtime->hw = snd_em28xx_hw_capture; - if ((dev->alt == 0 || dev->is_audio_only) && dev->adev.users == 0) { - if (dev->is_audio_only) - /* vendor audio is on a separate interface */ - dev->alt = 1; - else - /* vendor audio is on the same interface as video */ - dev->alt = 7; - /* - * FIXME: The intention seems to be to select the alt - * setting with the largest wMaxPacketSize for the video - * endpoint. - * At least dev->alt should be used instead, but we - * should probably not touch it at all if it is - * already >0, because wMaxPacketSize of the audio - * endpoints seems to be the same for all. - */ - - dprintk("changing alternate number on interface %d to %d\n", - dev->ifnum, dev->alt); - usb_set_interface(dev->udev, dev->ifnum, dev->alt); + + if (dev->adev.users == 0) { + if (dev->alt == 0 || dev->is_audio_only) { + if (dev->is_audio_only) + /* audio is on a separate interface */ + dev->alt = 1; + else + /* audio is on the same interface as video */ + dev->alt = 7; + /* + * FIXME: The intention seems to be to select + * the alt setting with the largest + * wMaxPacketSize for the video endpoint. + * At least dev->alt should be used instead, but + * we should probably not touch it at all if it + * is already >0, because wMaxPacketSize of the + * audio endpoints seems to be the same for all. + */ + dprintk("changing alternate number on interface %d to %d\n", + dev->ifnum, dev->alt); + usb_set_interface(dev->udev, dev->ifnum, dev->alt); + } /* Sets volume, mute, etc */ dev->mute = 0; |