Commit 968e51fb authored Jan 15, 2020 by Jack Pham

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



Since commit a0a4959e ("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.

Change-Id: I9d3aaf6083a6d859e7e64d167e3ee7eb61522052
Signed-off-by: Jack Pham <jackp@codeaurora.org>

parent fd8f045d

sound/usb/pcm.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -644,6 +644,8 @@ 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)
		{
		@@ -666,6 +668,11 @@ 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