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Wed, 19 Jun 2019 13:40:06 +0200 Received: from zeta.dmz-eu.st.com (zeta.dmz-eu.st.com [164.129.230.9]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id F017731; Wed, 19 Jun 2019 11:40:05 +0000 (GMT) Received: from Webmail-eu.st.com (Safex1hubcas22.st.com [10.75.90.92]) by zeta.dmz-eu.st.com (STMicroelectronics) with ESMTP id AF8A826C0; Wed, 19 Jun 2019 11:40:05 +0000 (GMT) Received: from SAFEX1HUBCAS21.st.com (10.75.90.45) by Safex1hubcas22.st.com (10.75.90.92) with Microsoft SMTP Server (TLS) id 14.3.439.0; Wed, 19 Jun 2019 13:40:05 +0200 Received: from localhost (10.201.23.16) by Webmail-ga.st.com (10.75.90.48) with Microsoft SMTP Server (TLS) id 14.3.439.0; Wed, 19 Jun 2019 13:40:05 +0200 From: Olivier Moysan To: , , , , , , , , , , , Date: Wed, 19 Jun 2019 13:40:02 +0200 Message-ID: <1560944402-8115-1-git-send-email-olivier.moysan@st.com> X-Mailer: git-send-email 2.7.4 MIME-Version: 1.0 X-Originating-IP: [10.201.23.16] X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-06-19_07:, , signatures=0 Cc: benjamin.gaignard@st.com Subject: [alsa-devel] [PATCH] ASoC: stm32: dfsdm: add 16 bits audio record support X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" X-Virus-Scanned: ClamAV using ClamSMTP Add support of audio 16 bits format record to STM32 DFSDM driver. Signed-off-by: Olivier Moysan --- sound/soc/stm/stm32_adfsdm.c | 49 +++++++++++++++++++++++++++++++++++--------- 1 file changed, 39 insertions(+), 10 deletions(-) diff --git a/sound/soc/stm/stm32_adfsdm.c b/sound/soc/stm/stm32_adfsdm.c index cc517e007039..3c9a9deec9af 100644 --- a/sound/soc/stm/stm32_adfsdm.c +++ b/sound/soc/stm/stm32_adfsdm.c @@ -45,7 +45,7 @@ struct stm32_adfsdm_priv { static const struct snd_pcm_hardware stm32_adfsdm_pcm_hw = { .info = SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_PAUSE, - .formats = SNDRV_PCM_FMTBIT_S32_LE, + .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE, .rate_min = 8000, .rate_max = 32000, @@ -141,7 +141,8 @@ static const struct snd_soc_dai_driver stm32_adfsdm_dai = { .capture = { .channels_min = 1, .channels_max = 1, - .formats = SNDRV_PCM_FMTBIT_S32_LE, + .formats = SNDRV_PCM_FMTBIT_S16_LE | + SNDRV_PCM_FMTBIT_S32_LE, .rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_32000), }, @@ -152,30 +153,58 @@ static const struct snd_soc_component_driver stm32_adfsdm_dai_component = { .name = "stm32_dfsdm_audio", }; +static void memcpy_32to16(void *dest, const void *src, size_t n) +{ + unsigned int i = 0; + u16 *d = (u16 *)dest, *s = (u16 *)src; + + s++; + for (i = n; i > 0; i--) { + *d++ = *s++; + s++; + } +} + static int stm32_afsdm_pcm_cb(const void *data, size_t size, void *private) { struct stm32_adfsdm_priv *priv = private; struct snd_soc_pcm_runtime *rtd = priv->substream->private_data; u8 *pcm_buff = priv->pcm_buff; u8 *src_buff = (u8 *)data; - unsigned int buff_size = snd_pcm_lib_buffer_bytes(priv->substream); - unsigned int period_size = snd_pcm_lib_period_bytes(priv->substream); unsigned int old_pos = priv->pos; - unsigned int cur_size = size; + size_t buff_size = snd_pcm_lib_buffer_bytes(priv->substream); + size_t period_size = snd_pcm_lib_period_bytes(priv->substream); + size_t cur_size, src_size = size; + snd_pcm_format_t format = priv->substream->runtime->format; + + if (format == SNDRV_PCM_FORMAT_S16_LE) + src_size >>= 1; + cur_size = src_size; dev_dbg(rtd->dev, "%s: buff_add :%pK, pos = %d, size = %zu\n", - __func__, &pcm_buff[priv->pos], priv->pos, size); + __func__, &pcm_buff[priv->pos], priv->pos, src_size); - if ((priv->pos + size) > buff_size) { - memcpy(&pcm_buff[priv->pos], src_buff, buff_size - priv->pos); + if ((priv->pos + src_size) > buff_size) { + if (format == SNDRV_PCM_FORMAT_S16_LE) + memcpy_32to16(&pcm_buff[priv->pos], src_buff, + buff_size - priv->pos); + else + memcpy(&pcm_buff[priv->pos], src_buff, + buff_size - priv->pos); cur_size -= buff_size - priv->pos; priv->pos = 0; } - memcpy(&pcm_buff[priv->pos], &src_buff[size - cur_size], cur_size); + if (format == SNDRV_PCM_FORMAT_S16_LE) + memcpy_32to16(&pcm_buff[priv->pos], + &src_buff[src_size - cur_size], cur_size); + else + memcpy(&pcm_buff[priv->pos], &src_buff[src_size - cur_size], + cur_size); + priv->pos = (priv->pos + cur_size) % buff_size; - if (cur_size != size || (old_pos && (old_pos % period_size < size))) + if (cur_size != src_size || (old_pos && (old_pos % period_size < size))) snd_pcm_period_elapsed(priv->substream); return 0;