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| author | Shuah Khan <shuahkh@osg.samsung.com> | 2016-03-02 17:50:31 +0100 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2016-03-03 19:01:13 +0100 |
| commit | aebb2b89bff0fdeb4e7ddd73dcbccde1a0f27554 (patch) | |
| tree | aad7f1862beb01250032ac02d46d1dac11ccaa18 /sound/usb/card.h | |
| parent | [media] dw2102: add support for TeVii S662 (diff) | |
| download | linux-aebb2b89bff0fdeb4e7ddd73dcbccde1a0f27554.tar.xz linux-aebb2b89bff0fdeb4e7ddd73dcbccde1a0f27554.zip | |
[media] sound/usb: Use Media Controller API to share media resources
Change ALSA driver to use Media Controller API to share media resources
with DVB and V4L2 drivers on a AU0828 media device. Media Controller
specific initialization is done after sound card is registered. ALSA
creates Media interface and entity function graph nodes for Control,
Mixer, PCM Playback, and PCM Capture devices.
snd_usb_hw_params() will call Media Controller enable source handler
interface to request the media resource. If resource request is
granted, it will release it from snd_usb_hw_free(). If resource is
busy, -EBUSY is returned.
Media specific cleanup is done in usb_audio_disconnect().
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'sound/usb/card.h')
| -rw-r--r-- | sound/usb/card.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/sound/usb/card.h b/sound/usb/card.h index 71778ca4b26a..34a0898e2238 100644 --- a/sound/usb/card.h +++ b/sound/usb/card.h @@ -105,6 +105,8 @@ struct snd_usb_endpoint { struct list_head list; }; +struct media_ctl; + struct snd_usb_substream { struct snd_usb_stream *stream; struct usb_device *dev; @@ -156,6 +158,7 @@ struct snd_usb_substream { } dsd_dop; bool trigger_tstamp_pending_update; /* trigger timestamp being updated from initial estimate */ + struct media_ctl *media_ctl; }; struct snd_usb_stream { |