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-rw-r--r--sound/usb/card.h1
-rw-r--r--sound/usb/format.c5
-rw-r--r--sound/usb/quirks.c13
3 files changed, 18 insertions, 1 deletions
diff --git a/sound/usb/card.h b/sound/usb/card.h
index 1406292d50ec..9b41b7dda84f 100644
--- a/sound/usb/card.h
+++ b/sound/usb/card.h
@@ -32,6 +32,7 @@ struct audioformat {
struct snd_pcm_chmap_elem *chmap; /* (optional) channel map */
bool dsd_dop; /* add DOP headers in case of DSD samples */
bool dsd_bitrev; /* reverse the bits of each DSD sample */
+ bool dsd_raw; /* altsetting is raw DSD */
};
struct snd_usb_substream;
diff --git a/sound/usb/format.c b/sound/usb/format.c
index 49e7ec6d2399..0a2a27f2854d 100644
--- a/sound/usb/format.c
+++ b/sound/usb/format.c
@@ -64,8 +64,11 @@ static u64 parse_audio_format_i_type(struct snd_usb_audio *chip,
sample_width = fmt->bBitResolution;
sample_bytes = fmt->bSubslotSize;
- if (format & UAC2_FORMAT_TYPE_I_RAW_DATA)
+ if (format & UAC2_FORMAT_TYPE_I_RAW_DATA) {
pcm_formats |= SNDRV_PCM_FMTBIT_SPECIAL;
+ /* flag potentially raw DSD capable altsettings */
+ fp->dsd_raw = true;
+ }
format <<= 1;
break;
diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index f4b69173682c..c616c251dbac 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -1443,6 +1443,19 @@ u64 snd_usb_interface_dsd_format_quirks(struct snd_usb_audio *chip,
return SNDRV_PCM_FMTBIT_DSD_U32_BE;
}
+ /* Mostly generic method to detect many DSD-capable implementations -
+ * from XMOS/Thesycon
+ */
+ switch (USB_ID_VENDOR(chip->usb_id)) {
+ case 0x25ce: /* Mytek devices */
+ if (fp->dsd_raw)
+ return SNDRV_PCM_FMTBIT_DSD_U32_BE;
+ break;
+ default:
+ break;
+
+ }
+
return 0;
}