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| author |   Jorge Sanjuan <jorge.sanjuan@codethink.co.uk> | 2018-07-31 13:28:43 +0100 |
|---|---|---|
| committer |   Takashi Iwai <tiwai@suse.de> | 2018-07-31 15:01:30 +0200 |
| commit | 7edf3b5e6a4544b42d3572a7058f8ffe96349ee8 (patch) | |
| tree | 3e19f5b92d3e3cddfd0c8401b90e9709557f6163 /sound/usb/card.h | |
| parent | ALSA: usb-audio: Initial Power Domain support (diff) | |
| download | linux-dev-7edf3b5e6a4544b42d3572a7058f8ffe96349ee8.tar.xz linux-dev-7edf3b5e6a4544b42d3572a7058f8ffe96349ee8.zip | |
ALSA: usb-audio: AudioStreaming Power Domain parsing
Power Domains in the UAC3 spec are mainly intended to be
associated to an Input or Output Terminal so the host
changes the power state of the entire capture or playback
path within the topology.
This patch adds support for finding Power Domains associated
to an Audio Streaming Interface (bTerminalLink) and adds a
reference to them in the usb audio substreams (snd_usb_substream).
Signed-off-by: Jorge Sanjuan <jorge.sanjuan@codethink.co.uk>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb/card.h')
| -rw-r--r-- | sound/usb/card.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/sound/usb/card.h b/sound/usb/card.h index 9b41b7dda84f..ac785d15ced4 100644 --- a/sound/usb/card.h +++ b/sound/usb/card.h @@ -37,6 +37,7 @@ struct audioformat { struct snd_usb_substream; struct snd_usb_endpoint; +struct snd_usb_power_domain; struct snd_urb_ctx { struct urb *urb; @@ -115,6 +116,7 @@ struct snd_usb_substream { int interface; /* current interface */ int endpoint; /* assigned endpoint */ struct audioformat *cur_audiofmt; /* current audioformat pointer (for hw_params callback) */ + struct snd_usb_power_domain *str_pd; /* UAC3 Power Domain for streaming path */ snd_pcm_format_t pcm_format; /* current audio format (for hw_params callback) */ unsigned int channels; /* current number of channels (for hw_params callback) */ unsigned int channels_max; /* max channels in the all audiofmts */ |