Re: [PATCH v2 0/2] ALSA: usb-audio: Add basic support for RME Digiface USB

[Takashi Iwai <tiwai@suse.de>]

On Tue, 03 Sep 2024 12:52:28 +0200,
Asahi Lina wrote:
> 
> Hi everyone,
> 
> This series adds basic support for the RME Digiface USB interface. This
> is a 4x ADAT I/O interface with an extra headphones output and support
> for S/PDIF mode.
> 
> There are 3 streaming configurations:
> 
> - 32in/34out at 1x speed mode
> - 16in/18out at 2x speed mode
> - 8in/10out at 4x speed mode
> 
> The appropriate speed mode is automatically set based on the PCM rate,
> and this governs the available channel count.
> 
> The first commit adds basic init and streaming support. This is enough
> to use the interface in its default settings (ADAT outputs, internal
> sync) using the ALSA PCM.
> 
> The second commit adds basic mixer controls to set up the I/O features
> (output modes, sync source) and report I/O status.
> 
> This series does not implement the output faders, matrix mixer, or input
> level meters. These features are more useful when the interface is used
> as a router (possibly stand-alone), and are not really something that
> can be exposed via ALSA mixer controls usable via something like
> alsamixer (the matrix mixer has up to 2048 possible mixer nodes). Since
> we expect users to use a dedicated control app, the intent is that the
> app directly controls these features via the libusb API. This is similar
> to how things work with some FireWire interfaces (ffado-mixer) today.
> 
> Of course, there is room for extending the mixer interface to add more
> controls in the future, once we settle on a mechanism to expose
> complex/large matrix mixers.
> 
> Signed-off-by: Asahi Lina <lina@asahilina.net>
> ---
> Changes in v2:
> - Fix BIT(32) that was intended to be BIT(31) (for 32-bit platforms)
> - Rebased on sound/for-next and rewrote quirk using macros
> - Removed USB_ENDPOINT_USAGE_IMPLICIT_FB since the sync info is explicitly
>   specified.
> - Link to v1: https://lore.kernel.org/r/20240902-rme-digiface-v1-0-6e88472a2744@asahilina.net
> 
> ---
> Asahi Lina (1):
>       ALSA: usb-audio: Add mixer quirk for RME Digiface USB
> 
> Cyan Nyan (1):
>       ALSA: usb-audio: Add quirk for RME Digiface USB

Applied to for-next branch now.


thanks,

Takashi