From: Olivier Moysan <olivier.moysan@st.com>
Date: Mon, 4 Nov 2019 14:36:54 +0100
Subject: ASoC: stm32: sai: add restriction on mmap support
Git-commit: eaf072e512d54c95b0977eda06cbca3151ace1e5
Patch-mainline: 5.4-rc7
References: bnc#1151927 5.3.15
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: Jiri Slaby <jslaby@suse.cz>
---
sound/soc/stm/stm32_sai_sub.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
--- a/sound/soc/stm/stm32_sai_sub.c
+++ b/sound/soc/stm/stm32_sai_sub.c
@@ -1217,6 +1217,16 @@ static int stm32_sai_pcm_process_spdif(s
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,
@@ -1269,7 +1279,7 @@ static const struct snd_dmaengine_pcm_co
};
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,
};