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ANDROID: sound: usb: Ensure UAC3 Power Domain is set to D0 when enabling stream

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Since commit a0a4959eb4 ("ALSA: usb-audio: Operate UAC3 Power
Domains in PCM callbacks") the UAC3 PD state is brought to D1 when
resuming from suspend, and suggests that only when a stream is
begun should a device be put into D0. We need to ensure that is
also done for the tunnel mode case, so add it to
snd_usb_enable_audio_stream() which will get called when receiving
a QMI request to enable the stream.

Fixes: 3f60546293 ("ANDROID: sound: usb: Add helper APIs to enable audio stream")
Change-Id: I9d3aaf6083a6d859e7e64d167e3ee7eb61522052
Signed-off-by: Jack Pham <jackp@codeaurora.org>
This commit is contained in:
Jack Pham
2020-01-15 16:09:44 -08:00
parent cdc9f6ef94
commit f5aaa8dab8
1 changed files with 7 additions and 0 deletions
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7
sound/usb/pcm.c
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@@ -653,6 +653,8 @@ static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
return 0;
}
static int snd_usb_pcm_change_state(struct snd_usb_substream *subs, int state);
int snd_usb_enable_audio_stream(struct snd_usb_substream *subs,
int datainterval, bool enable)
{
@@ -674,6 +676,11 @@ int snd_usb_enable_audio_stream(struct snd_usb_substream *subs,
}
snd_usb_autoresume(subs->stream->chip);
ret = snd_usb_pcm_change_state(subs, UAC3_PD_STATE_D0);
if (ret < 0)
return ret;
if (datainterval != -EINVAL)
fmt = find_format_and_si(subs, datainterval);
else