From: Dylan Van Assche Date: Wed, 27 Jan 2021 17:43:48 +0000 (+0100) Subject: staging: vc4_services: bcm2835-audio: Add SNDRV_PCM_INFO_BATCH flag X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=684ceb81dc970c382204b7b22bec8a431451b53e;p=linux.git staging: vc4_services: bcm2835-audio: Add SNDRV_PCM_INFO_BATCH flag Playing audio with PulseAudio and the bcm2835-pcm driver results in distorted sound. Timer-based scheduling does not properly work with bcm2835-pcm since configuring PulseAudio with tsched=0 avoids this problem. Setting the SNDRV_PCM_INFO_BATCH flag prevents PulseAudio to use timer-based scheduling by default. Settings this flag makes audio works out of the box. Based on: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7f2430cda819a9ecb1df5a0f3ef4f1c20db3f811 Signed-off-by: Dylan Van Assche Link: https://lore.kernel.org/r/20210127174348.10192-1-me@dylanvanassche.be Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c index f783b632141b5..1c200b923dfda 100644 --- a/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c +++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c @@ -12,7 +12,7 @@ static const struct snd_pcm_hardware snd_bcm2835_playback_hw = { .info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | - SNDRV_PCM_INFO_SYNC_APPLPTR), + SNDRV_PCM_INFO_SYNC_APPLPTR | SNDRV_PCM_INFO_BATCH), .formats = SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE, .rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000, .rate_min = 8000, @@ -29,7 +29,7 @@ static const struct snd_pcm_hardware snd_bcm2835_playback_hw = { static const struct snd_pcm_hardware snd_bcm2835_playback_spdif_hw = { .info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | - SNDRV_PCM_INFO_SYNC_APPLPTR), + SNDRV_PCM_INFO_SYNC_APPLPTR | SNDRV_PCM_INFO_BATCH), .formats = SNDRV_PCM_FMTBIT_S16_LE, .rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,