From: Hector Martin <mar...@marcan.st> commit e337bf19f6af38d5c3fa6d06cd594e0f890ca1ac upstream.
These devices claim to be 96kHz mono, but actually are 48kHz stereo with swapped channels and unaligned transfers. Cc: sta...@vger.kernel.org Signed-off-by: Hector Martin <mar...@marcan.st> Link: https://lore.kernel.org/r/20200702071433.237843-1-mar...@marcan.st Signed-off-by: Takashi Iwai <ti...@suse.de> Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> --- sound/usb/quirks-table.h | 52 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) --- a/sound/usb/quirks-table.h +++ b/sound/usb/quirks-table.h @@ -3460,4 +3460,56 @@ ALC1220_VB_DESKTOP(0x26ce, 0x0a01), /* A } }, +/* + * MacroSilicon MS2109 based HDMI capture cards + * + * These claim 96kHz 1ch in the descriptors, but are actually 48kHz 2ch. + * They also need QUIRK_AUDIO_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 swapped L-R channels, but that's for userspace to deal + * with. + */ +{ + USB_DEVICE(0x534d, 0x2109), + .driver_info = (unsigned long) &(const struct snd_usb_audio_quirk) { + .vendor_name = "MacroSilicon", + .product_name = "MS2109", + .ifnum = QUIRK_ANY_INTERFACE, + .type = QUIRK_COMPOSITE, + .data = &(const struct snd_usb_audio_quirk[]) { + { + .ifnum = 2, + .type = QUIRK_AUDIO_ALIGN_TRANSFER, + }, + { + .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 + } + } + } +}, + #undef USB_DEVICE_VENDOR_SPEC
