Re: [PATCH] ALSA: i2c: ak4xxx-adda: implement AK4529 reset handling

[Takashi Iwai]

On Tue, 07 Apr 2026 23:13:06 +0200,
Cássio Gabriel wrote:
> 
> Delta 410 uses snd_akm4xxx_reset() both around DFS changes and from
> its PM callbacks, but the AK4529 case in this helper is still left
> unimplemented and never drives the codec reset path.
> 
> The AK4529 datasheet documents register 09h.RSTN as an internal
> timing reset. Clearing RSTN powers down the ADC and DAC blocks, but
> does not reinitialize the register map. That matches the existing
> ak4xxx helper model, which already keeps the desired codec state in
> the software register cache.
> 
> Implement AK4529 reset handling by clearing 09h.RSTN on state == 1,
> then replaying the cached register image and setting RSTN back to 1
> on state == 0.
> 
> This restores cached Delta 410 mixer state after resume and gives
> the AK4529 DFS-change path a real codec reset sequence.
> 
> Signed-off-by: Cássio Gabriel <cassiogabrielcontato@xxxxxxxxx>

Applied to for-next branch.  Thanks.


Takashi