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| author | Jurgen Kramer <gtmkramer@xs4all.nl> | 2014-09-05 12:47:56 +0400 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2014-09-08 19:11:00 +0400 |
| commit | d4288d3fac18bbc31cb6d369679b1fa1d9321ae9 (patch) | |
| tree | ae486894fa6aa5db6f1c4c7a2d5d39622b19b428 /sound | |
| parent | 7fd4394dfe1db02ba904dfa1048f718cbca822d1 (diff) | |
| download | linux-d4288d3fac18bbc31cb6d369679b1fa1d9321ae9.tar.xz | |
ALSA: pcm: add new DSD sampleformat for native DSD playback on XMOS based devices
XMOS based USB DACs with native DSD support expose this feature via a USB
alternate setting. The audio format is either 32-bit raw or a 32-bit PCM format.
To utilize this feature on linux this patch introduces a new 32-bit DSD
sampleformat DSD_U32_LE.
A follow up patch will add a quirk for XMOS based devices to utilize the new format.
Further patches will add support to alsa-lib.
Signed-off-by: Jurgen Kramer <gtmkramer@xs4all.nl>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/core/pcm.c | 1 | ||||
| -rw-r--r-- | sound/core/pcm_misc.c | 4 |
2 files changed, 5 insertions, 0 deletions
diff --git a/sound/core/pcm.c b/sound/core/pcm.c index afccdc553ef9..42ded997b223 100644 --- a/sound/core/pcm.c +++ b/sound/core/pcm.c @@ -215,6 +215,7 @@ static char *snd_pcm_format_names[] = { FORMAT(G723_40_1B), FORMAT(DSD_U8), FORMAT(DSD_U16_LE), + FORMAT(DSD_U32_LE), }; const char *snd_pcm_format_name(snd_pcm_format_t format) diff --git a/sound/core/pcm_misc.c b/sound/core/pcm_misc.c index 4560ca0e5651..83f54e1dbac9 100644 --- a/sound/core/pcm_misc.c +++ b/sound/core/pcm_misc.c @@ -148,6 +148,10 @@ static struct pcm_format_data pcm_formats[(INT)SNDRV_PCM_FORMAT_LAST+1] = { .width = 16, .phys = 16, .le = 1, .signd = 0, .silence = {}, }, + [SNDRV_PCM_FORMAT_DSD_U32_LE] = { + .width = 32, .phys = 32, .le = 1, .signd = 0, + .silence = { 0x69, 0x69, 0x69, 0x69 }, + }, /* FIXME: the following three formats are not defined properly yet */ [SNDRV_PCM_FORMAT_MPEG] = { .le = -1, .signd = -1, |