Re: [PATCH] ALSA: dice: add support for TASCAM IF-FW/DM MkII

[Takashi Iwai <tiwai@suse.de>]

On Fri, 17 Oct 2025 13:11:45 +0200,
Takashi Sakamoto wrote:
> 
> TEAC Corporation launched IF-FW/DM MkII as an add-in card for TASCAM
> DM-3200 and DM-4800. This card uses TC Applied Technologies DICE II
> ASIC.
> 
> This commit supports the add-in card. The configuration ROM content
> includes some quirks:
> 
> - The category value stored in chip_ID_hi field of bus information block
>   is zero.
> - The value of model in unit directory (0x00022e) is different from the
>   one in root directory (0x000006).
> 
> The hardware allows users to select the total number of audio data channels
> available for system from 16 and 32 channels for both input and output
> direction. In 16-channel mode,  all audio data are transferred in a
> single isochronous packet stream, while in 32-channel mode, they are
> transferred across two streams. After the user changes the channel
> configuration on the hardware panel, the device temporarily disappears
> from the bus and reappears with the new stream formats. During device
> probing the ALSA dice driver checks the number of available isochronous
> packet streams to determine the active mode of the hardware.
> 
> Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>

Applied to for-next branch now.  Thanks.


Takashi