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ASoC: stm32: sai: add restriction on mmap support 

Do not support mmap in S/PDIF mode. In S/PDIF mode
the buffer has to be copied, to allow the channel status
bits insertion.

Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
Link: https://lore.kernel.org/r/20191104133654.28750-1-olivier.moysan@st.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Olivier Moysan 2019-11-04 14:36:54 +01:00 committed by Mark Brown
parent 5dc7d5bc96
commit eaf072e512
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GPG Key ID: 24D68B725D5487D0
1 changed files with 11 additions and 1 deletions
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12
sound/soc/stm/stm32_sai_sub.c
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@ -1218,6 +1218,16 @@ static int stm32_sai_pcm_process_spdif(struct snd_pcm_substream *substream,
return 0;
}
/* No support of mmap in S/PDIF mode */
static const struct snd_pcm_hardware stm32_sai_pcm_hw_spdif = {
.info = SNDRV_PCM_INFO_INTERLEAVED,
.buffer_bytes_max = 8 * PAGE_SIZE,
.period_bytes_min = 1024,
.period_bytes_max = PAGE_SIZE,
.periods_min = 2,
.periods_max = 8,
};
static const struct snd_pcm_hardware stm32_sai_pcm_hw = {
.info = SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_MMAP,
.buffer_bytes_max = 8 * PAGE_SIZE,
@ -1270,7 +1280,7 @@ static const struct snd_dmaengine_pcm_config stm32_sai_pcm_config = {
};
static const struct snd_dmaengine_pcm_config stm32_sai_pcm_config_spdif = {
.pcm_hardware = &stm32_sai_pcm_hw,
.pcm_hardware = &stm32_sai_pcm_hw_spdif,
.prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
.process = stm32_sai_pcm_process_spdif,
};