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 (file)
--- a/sound/core/pcm_dmaengine.c
+++ b/sound/core/pcm_dmaengine.c
@@ -63,23 +63,19 @@ int snd_hwparams_to_dma_slave_config(const struct snd_pcm_substream *substream,
        struct dma_slave_config *slave_config)
 {
        enum dma_slave_buswidth buswidth;
+       int bits;
 
-       switch (params_format(params)) {
-       case SNDRV_PCM_FORMAT_S8:
+       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;
-               break;
-       case SNDRV_PCM_FORMAT_S16_LE:
+       else if (bits == 16)
                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:
+       else if (bits <= 32)
                buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES;
-               break;
-       default:
-               return -EINVAL;
-       }
+       else
+               buswidth = DMA_SLAVE_BUSWIDTH_8_BYTES;
 
        if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
                slave_config->direction = DMA_MEM_TO_DEV;