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ASoC: stm32: sai: add restriction on mmap support
[ Upstream commit eaf072e512
]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
parent
3f034e6889
commit
22f4892950
1 changed files with 11 additions and 1 deletions
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@ -994,6 +994,16 @@ static int stm32_sai_pcm_process_spdif(struct snd_pcm_substream *substream,
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return 0;
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}
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/* No support of mmap in S/PDIF mode */
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static const struct snd_pcm_hardware stm32_sai_pcm_hw_spdif = {
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.info = SNDRV_PCM_INFO_INTERLEAVED,
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.buffer_bytes_max = 8 * PAGE_SIZE,
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.period_bytes_min = 1024,
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.period_bytes_max = PAGE_SIZE,
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.periods_min = 2,
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.periods_max = 8,
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};
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static const struct snd_pcm_hardware stm32_sai_pcm_hw = {
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.info = SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_MMAP,
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.buffer_bytes_max = 8 * PAGE_SIZE,
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@ -1050,7 +1060,7 @@ static const struct snd_dmaengine_pcm_config stm32_sai_pcm_config = {
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};
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static const struct snd_dmaengine_pcm_config stm32_sai_pcm_config_spdif = {
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.pcm_hardware = &stm32_sai_pcm_hw,
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.pcm_hardware = &stm32_sai_pcm_hw_spdif,
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.prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
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.process = stm32_sai_pcm_process_spdif,
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};
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