ALSA: pcm_dmaengine: Remove hardcoded PCM formats
Use the standard PCM helper function to figure out the sample bytes
instead of hardcodec PCM format checks in
snd_hwparams_to_dma_slave_config().
The patch also extends the format check for 8 bytes formats although
no one should match so far.
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/core/pcm_dmaengine.c b/sound/core/pcm_dmaengine.c
index aa924d9..94d0873 100644
--- a/sound/core/pcm_dmaengine.c
+++ b/sound/core/pcm_dmaengine.c
@@ -63,23 +63,19 @@
struct dma_slave_config *slave_config)
{
enum dma_slave_buswidth buswidth;
+ int bits;
- switch (params_format(params)) {
- case SNDRV_PCM_FORMAT_S8:
- buswidth = DMA_SLAVE_BUSWIDTH_1_BYTE;
- break;
- case SNDRV_PCM_FORMAT_S16_LE:
- buswidth = DMA_SLAVE_BUSWIDTH_2_BYTES;
- break;
- case SNDRV_PCM_FORMAT_S18_3LE:
- case SNDRV_PCM_FORMAT_S20_3LE:
- case SNDRV_PCM_FORMAT_S24_LE:
- case SNDRV_PCM_FORMAT_S32_LE:
- buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES;
- break;
- default:
+ bits = snd_pcm_format_physical_width(params_format(params));
+ if (bits < 8 || bits > 64)
return -EINVAL;
- }
+ else if (bits == 8)
+ buswidth = DMA_SLAVE_BUSWIDTH_1_BYTE;
+ else if (bits == 16)
+ buswidth = DMA_SLAVE_BUSWIDTH_2_BYTES;
+ else if (bits <= 32)
+ buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ else
+ buswidth = DMA_SLAVE_BUSWIDTH_8_BYTES;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
slave_config->direction = DMA_MEM_TO_DEV;
