Re: [PATCH 31/36] ALSA: seq: Bind UMP device

[Jaroslav Kysela <perex@perex.cz>]

On 19. 05. 23 11:31, Takashi Iwai wrote:
> This patch introduces a new ALSA sequencer client for the kernel UMP
> object, snd-seq-ump-client.  It's a UMP version of snd-seq-midi
> driver, while this driver creates a sequencer client per UMP endpoint
> which contains (fixed) 16 ports.
> 
> The UMP rawmidi device is opened in APPEND mode for output, so that
> multiple sequencer clients can share the same UMP endpoint, as well as
> the legacy UMP rawmidi devices that are opened in APPEND mode, too.
> For input, on the other hand, the incoming data is processed on the
> fly in the dedicated hook, hence it doesn't open a rawmidi device.
> 
> The UMP packet group is updated upon delivery depending on the target
> sequencer port (which corresponds to the actual UMP group).
> 
> Each sequencer port sets a new port type bit,
> SNDRV_SEQ_PORT_TYPE_MIDI_UMP, in addition to the other standard
> types for MIDI.
> 
> Signed-off-by: Takashi Iwai <tiwai@suse.de>

Reviewed-by: Jaroslav Kysela <perex@perex.cz>

-- 
Jaroslav Kysela <perex@perex.cz>
Linux Sound Maintainer; ALSA Project; Red Hat, Inc.