[alsa-devel] [PATCH v3] ALSA: usb-audio: Add boot quirk for MOTU M Series

[Takashi Iwai]

On Sun, 12 Jan 2020 11:23:58 +0100,
Alexander Tsoy wrote:
> 
> Add delay to make sure that audio urbs are not sent too early.
> Otherwise the device hangs. Windows driver makes ~2s delay, so use
> about the same time delay value.
> 
> snd_usb_apply_boot_quirk() is called 3 times for my MOTU M4, which
> is an overkill. Thus a quirk that is called only once is implemented.
> 
> Also send two vendor-specific control messages before and after
> the delay. This behaviour is blindly copied from the Windows driver.
> 
> Signed-off-by: Alexander Tsoy <alexander at tsoy.me>
> ---
> v3 changes: fixed identations once more

Applied now.  Thanks.


Takashi