diff options
| author | Daniel Mack <zonque@gmail.com> | 2013-04-17 00:01:40 +0800 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2013-04-18 10:03:53 +0200 |
| commit | 126825e7ea271ae8e3172e10ca1fc22c908b5385 (patch) | |
| tree | b19bbca378e58874625132b41aaaea1855ec44f6 /sound/usb/format.c | |
| parent | 44dcbbb1cd615634c09d1bf31c124332795903a8 (diff) | |
ALSA: snd-usb: add quirks handler for DSD streams
Unfortunately, none of the UAC standards provides a way to identify DSD
(Direct Stream Digital) formats. Hence, this patch adds a quirks
handler to identify USB interfaces that are capable of handling DSD.
That quirks handler can augment the already parsed formats bit-field,
by any of the new SNDRV_PCM_FMTBIT_DSD_{U8_U16} and setting the dsd_dop
flag in the audio format, if the driver should take care for the DOP
byte stuffing.
The only devices that are known to work with this are the ones with
a 'Playback Designs' vendor id.
Signed-off-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb/format.c')
| -rw-r--r-- | sound/usb/format.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/sound/usb/format.c b/sound/usb/format.c index 20c77517095..020ede0259e 100644 --- a/sound/usb/format.c +++ b/sound/usb/format.c @@ -136,6 +136,9 @@ static u64 parse_audio_format_i_type(struct snd_usb_audio *chip, snd_printk(KERN_INFO "%d:%u:%d : unsupported format bits %#x\n", chip->dev->devnum, fp->iface, fp->altsetting, format); } + + pcm_formats |= snd_usb_interface_dsd_format_quirks(chip, fp, sample_bytes); + return pcm_formats; } |