From: Olivier Moysan <olivier.moysan@st.com>
To: <lgirdwood@gmail.com>, <broonie@kernel.org>, <perex@perex.cz>,
<tiwai@suse.com>, <mcoquelin.stm32@gmail.com>,
<alexandre.torgue@st.com>, <alsa-devel@alsa-project.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-stm32@st-md-mailman.stormreply.com>,
<linux-kernel@vger.kernel.org>, <olivier.moysan@st.com>,
<arnaud.pouliquen@st.com>
Cc: <benjamin.gaignard@st.com>
Subject: [PATCH] ASoC: stm32: sai: add restriction on mmap support
Date: Mon, 4 Nov 2019 14:36:54 +0100 [thread overview]
Message-ID: <20191104133654.28750-1-olivier.moysan@st.com> (raw)
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>
---
sound/soc/stm/stm32_sai_sub.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/sound/soc/stm/stm32_sai_sub.c b/sound/soc/stm/stm32_sai_sub.c
index a4060813bc74..48e629ac2d88 100644
--- a/sound/soc/stm/stm32_sai_sub.c
+++ b/sound/soc/stm/stm32_sai_sub.c
@@ -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,
};
--
2.17.1
next reply other threads:[~2019-11-04 13:38 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-04 13:36 Olivier Moysan [this message]
2019-11-05 18:55 ` Applied "ASoC: stm32: sai: add restriction on mmap support" to the asoc tree Mark Brown
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