diff options
| author | Shuah Khan <shuahkh@osg.samsung.com> | 2016-03-02 13:50:31 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2016-03-03 15:01:13 -0300 |
| commit | aebb2b89bff0fdeb4e7ddd73dcbccde1a0f27554 (patch) | |
| tree | aad7f1862beb01250032ac02d46d1dac11ccaa18 /sound/usb/mixer.h | |
| parent | 6ede20f9683c55dac8281b63d80b5cc669640252 (diff) | |
| download | linux-aebb2b89bff0fdeb4e7ddd73dcbccde1a0f27554.tar.bz2 | |
[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/mixer.h')
| -rw-r--r-- | sound/usb/mixer.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/sound/usb/mixer.h b/sound/usb/mixer.h index 3417ef347e40..f3789446ab9c 100644 --- a/sound/usb/mixer.h +++ b/sound/usb/mixer.h @@ -3,6 +3,8 @@ #include <sound/info.h> +struct media_mixer_ctl; + struct usb_mixer_interface { struct snd_usb_audio *chip; struct usb_host_interface *hostif; @@ -22,6 +24,7 @@ struct usb_mixer_interface { struct urb *rc_urb; struct usb_ctrlrequest *rc_setup_packet; u8 rc_buffer[6]; + struct media_mixer_ctl *media_mixer_ctl; }; #define MAX_CHANNELS 16 /* max logical channels */ |