From bf1ad3e007e26df838e839bba97c3396ee91f51d Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Tue, 4 Sep 2018 17:58:38 +0200 Subject: [PATCH] staging: bcm2835-audio: Fix incorrect draining handling The handling of SNDRV_PCM_TRIGGER_STOP at the trigger callback is incorrect: when the STOP is issued, the driver is supposed to drop the stream immediately. Meanwhile bcm2835 driver checks the DRAINING state and tries to issue some different command. This patch straightens things a bit, dropping the incorrect state checks. The draining behavior would be still not perfect at this point, but will be improved in a later patch. Signed-off-by: Takashi Iwai Tested-by: Stefan Wahren Signed-off-by: Greg Kroah-Hartman --- .../vc04_services/bcm2835-audio/bcm2835-pcm.c | 18 ++++++------------ 1 file changed, 6 insertions(+), 12 deletions(-) diff --git a/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c index b4b9e90131bf..00c2abab4bba 100644 --- a/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c +++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c @@ -153,7 +153,6 @@ static int snd_bcm2835_playback_open_generic( chip->alsa_stream[idx] = alsa_stream; chip->opened |= (1 << idx); - alsa_stream->draining = 1; out: mutex_unlock(&chip->audio_mutex); @@ -268,6 +267,7 @@ static int snd_bcm2835_pcm_prepare(struct snd_pcm_substream *substream) alsa_stream->buffer_size = snd_pcm_lib_buffer_bytes(substream); alsa_stream->period_size = snd_pcm_lib_period_bytes(substream); alsa_stream->pos = 0; + alsa_stream->draining = false; audio_debug("buffer_size=%d, period_size=%d pos=%d frame_bits=%d\n", alsa_stream->buffer_size, alsa_stream->period_size, @@ -312,21 +312,15 @@ static int snd_bcm2835_pcm_trigger(struct snd_pcm_substream *substream, int cmd) switch (cmd) { case SNDRV_PCM_TRIGGER_START: err = bcm2835_audio_start(alsa_stream); - if (!err) - alsa_stream->draining = 1; - else + if (err) audio_error(" Failed to START alsa device (%d)\n", err); break; + case SNDRV_PCM_TRIGGER_DRAIN: + alsa_stream->draining = true; + break; case SNDRV_PCM_TRIGGER_STOP: - if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { - audio_info("DRAINING\n"); - alsa_stream->draining = 1; - } else { - audio_info("DROPPING\n"); - alsa_stream->draining = 0; - } err = bcm2835_audio_stop(alsa_stream); - if (err != 0) + if (err) audio_error(" Failed to STOP alsa device (%d)\n", err); break; default: -- 2.30.2