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staging: bcm2835-audio: Drop useless running flag and check

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The running flag of alsa_stream is basically useless.  The running
state is strictly controlled in ALSA PCM core side, hence the check in
PCM trigger and close callbacks are superfluous.

Also, the prefill ack at trigger start became superfluous nowadays
with the ALSA PCM core update.

Let's rip them off.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Takashi Iwai 2018-09-04 17:58:37 +02:00 committed by Greg Kroah-Hartman
parent aa45eeee51
commit c5e7824b57
2 changed files with 8 additions and 39 deletions
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46
drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c
View File

@ -187,19 +187,6 @@ static int snd_bcm2835_playback_close(struct snd_pcm_substream *substream)
audio_info("Alsa close\n");
/*
* Call stop if it's still running. This happens when app
* is force killed and we don't get a stop trigger.
*/
if (alsa_stream->running) {
int err;
err = bcm2835_audio_stop(alsa_stream);
alsa_stream->running = 0;
if (err)
audio_error(" Failed to STOP alsa device\n");
}
alsa_stream->period_size = 0;
alsa_stream->buffer_size = 0;
@ -324,27 +311,13 @@ static int snd_bcm2835_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
audio_debug("bcm2835_AUDIO_TRIGGER_START running=%d\n",
alsa_stream->running);
if (!alsa_stream->running) {
err = bcm2835_audio_start(alsa_stream);
if (!err) {
alsa_stream->pcm_indirect.hw_io =
alsa_stream->pcm_indirect.hw_data =
bytes_to_frames(runtime,
alsa_stream->pos);
substream->ops->ack(substream);
alsa_stream->running = 1;
alsa_stream->draining = 1;
} else {
audio_error(" Failed to START alsa device (%d)\n", err);
}
}
err = bcm2835_audio_start(alsa_stream);
if (!err)
alsa_stream->draining = 1;
else
audio_error(" Failed to START alsa device (%d)\n", err);
break;
case SNDRV_PCM_TRIGGER_STOP:
audio_debug
("bcm2835_AUDIO_TRIGGER_STOP running=%d draining=%d\n",
alsa_stream->running, runtime->status->state == SNDRV_PCM_STATE_DRAINING);
if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
audio_info("DRAINING\n");
alsa_stream->draining = 1;
@ -352,12 +325,9 @@ static int snd_bcm2835_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
audio_info("DROPPING\n");
alsa_stream->draining = 0;
}
if (alsa_stream->running) {
err = bcm2835_audio_stop(alsa_stream);
if (err != 0)
audio_error(" Failed to STOP alsa device (%d)\n", err);
alsa_stream->running = 0;
}
err = bcm2835_audio_stop(alsa_stream);
if (err != 0)
audio_error(" Failed to STOP alsa device (%d)\n", err);
break;
default:
err = -EINVAL;

1
drivers/staging/vc04_services/bcm2835-audio/bcm2835.h
View File

@ -121,7 +121,6 @@ struct bcm2835_alsa_stream {
spinlock_t lock;
int running;
int draining;
int channels;