Asunto: SAVITECH JM45 (262a:0001) needs QUIRK_FLAG_DSD_RAW for native DSD

Hi,

I have a SAVITECH JM45 USB DAC that supports native DSD playback but
is not in the quirk_flags_table. Without a quirk, the DSD altset is
exposed as SPECIAL and userspace falls back to DoP or PCM conversion.

USB descriptor:

  Bus 003 Device 009: ID 262a:0001 SAVITECH Corp. JM45

Relevant part of /proc/asound/cardN/stream0 (without quirk):

  Interface 2
    Altset 4
    Format: SPECIAL
    Channels: 2
    Rates: 44100, 48000, 88200, 96000, 176400, 192000, 352800, 384000
    Bits: 32
    DSD raw: DOP=0, bitrev=0

After loading with:

  modprobe snd_usb_audio quirk_flags=262a0001:0x8000

The altset is correctly exposed as DSD_U32_BE and MPD 0.24 plays DSF
files natively at DSD64/128/256 (verified visually: the DAC's status
LED switches from green to blue indicating raw DSD reception, and
/proc/asound/cardN/pcm0p/sub0/hw_params shows format: DSD_U32_BE).

Could QUIRK_FLAG_DSD_RAW be added for 262a:0001?

Kernel:  linux Samsung 7.0.5-2-cachyos
(CachyOS rolling)
Tested with: mpd 0.24.10, alsa-lib 1.2.x

Thanks,
Alejandro