kevin/linux
1
Fork 0
Code

ALSA: usb-audio: Add quirks for MacroSilicon MS2100/MS2106 devices

Browse Source 
Treat the claimed 96kHz 1ch in the descriptors as 48kHz 2ch, so that
the audio stream doesn't sound mono. Also fix initial stream
alignment, so that left and right channels are in the correct order.

Signed-off-by: John Veness <john-linux@pelago.org.uk>
Link: https://lore.kernel.org/r/20220624140757.28758-1-john-linux@pelago.org.uk
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
John Veness 2022-06-24 15:07:57 +01:00 committed by Takashi Iwai
parent ae8b163156
commit 6e2c9105e0
2 changed files with 51 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

48
sound/usb/quirks-table.h
View File

@ -3802,6 +3802,54 @@ YAMAHA_DEVICE(0x7010, "UB99"),
}
},
/*
* MacroSilicon MS2100/MS2106 based AV capture cards
*
* These claim 96kHz 1ch in the descriptors, but are actually 48kHz 2ch.
* They also need QUIRK_FLAG_ALIGN_TRANSFER, which makes one wonder if
* they pretend to be 96kHz mono as a workaround for stereo being broken
* by that...
*
* They also have an issue with initial stream alignment that causes the
* channels to be swapped and out of phase, which is dealt with in quirks.c.
*/
{
USB_AUDIO_DEVICE(0x534d, 0x0021),
.driver_info = (unsigned long) &(const struct snd_usb_audio_quirk) {
.vendor_name = "MacroSilicon",
.product_name = "MS210x",
.ifnum = QUIRK_ANY_INTERFACE,
.type = QUIRK_COMPOSITE,
.data = &(const struct snd_usb_audio_quirk[]) {
{
.ifnum = 2,
.type = QUIRK_AUDIO_STANDARD_MIXER,
},
{
.ifnum = 3,
.type = QUIRK_AUDIO_FIXED_ENDPOINT,
.data = &(const struct audioformat) {
.formats = SNDRV_PCM_FMTBIT_S16_LE,
.channels = 2,
.iface = 3,
.altsetting = 1,
.altset_idx = 1,
.attributes = 0,
.endpoint = 0x82,
.ep_attr = USB_ENDPOINT_XFER_ISOC |
USB_ENDPOINT_SYNC_ASYNC,
.rates = SNDRV_PCM_RATE_CONTINUOUS,
.rate_min = 48000,
.rate_max = 48000,
}
},
{
.ifnum = -1
}
}
}
},
/*
* MacroSilicon MS2109 based HDMI capture cards
*

3
sound/usb/quirks.c
View File

@ -1478,6 +1478,7 @@ void snd_usb_set_format_quirk(struct snd_usb_substream *subs,
case USB_ID(0x041e, 0x3f19): /* E-Mu 0204 USB */
set_format_emu_quirk(subs, fmt);
break;
case USB_ID(0x534d, 0x0021): /* MacroSilicon MS2100/MS2106 */
case USB_ID(0x534d, 0x2109): /* MacroSilicon MS2109 */
subs->stream_offset_adj = 2;
break;
@ -1908,6 +1909,8 @@ static const struct usb_audio_quirk_flags_table quirk_flags_table[] = {
QUIRK_FLAG_IGNORE_CTL_ERROR),
DEVICE_FLG(0x413c, 0xa506, /* Dell AE515 sound bar */
QUIRK_FLAG_GET_SAMPLE_RATE),
DEVICE_FLG(0x534d, 0x0021, /* MacroSilicon MS2100/MS2106 */
QUIRK_FLAG_ALIGN_TRANSFER),
DEVICE_FLG(0x534d, 0x2109, /* MacroSilicon MS2109 */
QUIRK_FLAG_ALIGN_TRANSFER),
DEVICE_FLG(0x1224, 0x2a25, /* Jieli Technology USB PHY 2.0 */