diff options
| author | Alan Tull <r80115@freescale.com> | 2010-03-24 20:48:08 -0500 |
|---|---|---|
| committer | Alan Tull <r80115@freescale.com> | 2010-03-25 15:57:20 -0500 |
| commit | 1b07ae665ef8afc6e3450398fd9fbb0a81395c69 (patch) | |
| tree | f3005b32a3b740295cf99eaf3a4e067a62d9be8f /sound | |
| parent | 7574d44d5d2021fb09ce465c3dc43aad905660cf (diff) | |
ENGR00122025 mx28: support 24, 32 bit spdif
The data in memory is 24 bit little endian in a 32 bit word.
We need to shift the data in memory out one byte to get the proper
alignment.
Signed-off-by: Alan Tull <r80115@freescale.com>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/codecs/mxs_spdif.c | 1 | ||||
| -rw-r--r-- | sound/soc/codecs/mxs_spdif.h | 3 | ||||
| -rw-r--r-- | sound/soc/mxs/mxs-pcm.c | 27 |
3 files changed, 30 insertions, 1 deletions
diff --git a/sound/soc/codecs/mxs_spdif.c b/sound/soc/codecs/mxs_spdif.c index b9f05f00aa0b..a59f3a0fdefa 100644 --- a/sound/soc/codecs/mxs_spdif.c +++ b/sound/soc/codecs/mxs_spdif.c @@ -171,6 +171,7 @@ static int mxs_codec_hw_params(struct snd_pcm_substream *substream, break; case SNDRV_PCM_FORMAT_S20_3LE: case SNDRV_PCM_FORMAT_S24_LE: + case SNDRV_PCM_FORMAT_S32_LE: if (playback) __raw_writel(BM_SPDIF_CTRL_WORD_LENGTH, REGS_SPDIF_BASE + HW_SPDIF_CTRL_CLR); diff --git a/sound/soc/codecs/mxs_spdif.h b/sound/soc/codecs/mxs_spdif.h index 284b98cd6f74..6bce044d683e 100644 --- a/sound/soc/codecs/mxs_spdif.h +++ b/sound/soc/codecs/mxs_spdif.h @@ -163,7 +163,8 @@ #define MXS_SPDIF_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \ SNDRV_PCM_FMTBIT_S20_3LE | \ - SNDRV_PCM_FMTBIT_S24_LE) + SNDRV_PCM_FMTBIT_S24_LE | \ + SNDRV_PCM_FMTBIT_S32_LE) extern struct snd_soc_dai mxs_spdif_codec_dai; extern struct snd_soc_codec_device soc_spdif_codec_dev_mxs; diff --git a/sound/soc/mxs/mxs-pcm.c b/sound/soc/mxs/mxs-pcm.c index 6bac0eeac767..db3214624c4b 100644 --- a/sound/soc/mxs/mxs-pcm.c +++ b/sound/soc/mxs/mxs-pcm.c @@ -62,6 +62,7 @@ struct mxs_runtime_data { u32 dma_ch; u32 dma_period; u32 dma_totsize; + int format; struct mxs_pcm_dma_params *params; struct mxs_dma_desc *dma_desc_array[255]; @@ -224,6 +225,7 @@ static int mxs_pcm_hw_params(struct snd_pcm_substream *substream, prtd->dma_period = params_period_bytes(hw_params); prtd->dma_totsize = params_buffer_bytes(hw_params); + prtd->format = params_format(hw_params); return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)); @@ -340,6 +342,30 @@ static int mxs_pcm_close(struct snd_pcm_substream *substream) return 0; } +static int mcs_pcm_copy(struct snd_pcm_substream *substream, int channel, + snd_pcm_uframes_t hwoff, void __user *buf, + snd_pcm_uframes_t frames) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct mxs_runtime_data *prtd = runtime->private_data; + char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff); + unsigned long count = frames_to_bytes(runtime, frames); + + /* For S/PDIF 24-bit playback, fix the buffer. Code taken + from snd_pcm_lib_write_transfer() in sound/core/pcm_lib.c */ + if ((prtd->params->dma_ch == MXS_DMA_CHANNEL_AHB_APBX_SPDIF) && + ((prtd->format == SNDRV_PCM_FORMAT_S24_LE) + || (prtd->format == SNDRV_PCM_FORMAT_S20_3LE))) { + if (copy_from_user(hwbuf + 1, buf, count - 1)) + return -EFAULT; + } else { + if (copy_from_user(hwbuf, buf, count)) + return -EFAULT; + } + + return 0; +} + static int mxs_pcm_mmap(struct snd_pcm_substream *substream, struct vm_area_struct *vma) { @@ -358,6 +384,7 @@ struct snd_pcm_ops mxs_pcm_ops = { .prepare = mxs_pcm_prepare, .trigger = mxs_pcm_trigger, .pointer = mxs_pcm_pointer, + .copy = mcs_pcm_copy, .mmap = mxs_pcm_mmap, }; |