Unverified Commit eaf072e5 authored by Olivier Moysan's avatar Olivier Moysan Committed by Mark Brown
Browse files

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: default avatarOlivier Moysan <olivier.moysan@st.com>
Link: https://lore.kernel.org/r/20191104133654.28750-1-olivier.moysan@st.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 5dc7d5bc

sound/soc/stm/stm32_sai_sub.c

+11 −1
Original line number Diff line number Diff line
@@ -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,

};

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