[ALSA] cmipci - allow capture of raw spdif subframes

Enable capturing of raw 32bit IEC958_SUBFRAME.
The 24-bits PCM data can be obtained using iec958 plugin.
Known problem: captured stream may begin with either left or right
subframe. Since the iec958 plugin doesn't decode preamble it may swap
the channels sometime.

Signed-off-by: Timofei Bondarenko <tim@ipi.ac.ru>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

1 files changed, 8 insertions, 1 deletions

diff --git a/sound/pci/cmipci.c b/sound/pci/cmipci.c
index d1f23ebed2a..187203e55d3 100644
--- a/sound/pci/cmipci.c
+++ b/sound/pci/cmipci.c
@@ -1407,6 +1407,11 @@ static int snd_cmipci_capture_spdif_prepare(struct snd_pcm_substream *substream)
                 else
                         snd_cmipci_clear_bit(cm, CM_REG_CHFORMAT, CM_DBLSPDS);
         }
+        if (snd_pcm_format_width(substream->runtime->format) > 16)
+                snd_cmipci_set_bit(cm, CM_REG_MISC_CTRL, CM_SPD32SEL);
+        else
+                snd_cmipci_clear_bit(cm, CM_REG_MISC_CTRL, CM_SPD32SEL);
+
         spin_unlock_irq(&cm->reg_lock);
 
         return snd_cmipci_pcm_prepare(cm, &cm->channel[CM_CH_CAPT], substream);
@@ -1418,6 +1423,7 @@ static int snd_cmipci_capture_spdif_hw_free(struct snd_pcm_substream *subs)
 
         spin_lock_irq(&cm->reg_lock);
         snd_cmipci_clear_bit(cm, CM_REG_FUNCTRL1, CM_CAPTURE_SPDF);
+        snd_cmipci_clear_bit(cm, CM_REG_MISC_CTRL, CM_SPD32SEL);
         spin_unlock_irq(&cm->reg_lock);
 
         return snd_cmipci_hw_free(subs);
@@ -1569,7 +1575,8 @@ static struct snd_pcm_hardware snd_cmipci_capture_spdif =
         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
                                  SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_PAUSE |
                                  SNDRV_PCM_INFO_RESUME | SNDRV_PCM_INFO_MMAP_VALID),
-        .formats =              SNDRV_PCM_FMTBIT_S16_LE,
+        .formats =              SNDRV_PCM_FMTBIT_S16_LE |
+                                SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE,
         .rates =                SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
         .rate_min =             44100,
         .rate_max =             48000,