Re: [PATCH v10 1/4] ASoC: SDCA: Add PDE state transition helper

[Pierre-Louis Bossart <pierre-louis.bossart@linux.dev>]

On 4/21/26 17:57, Charles Keepax wrote:
> On Tue, Apr 21, 2026 at 09:18:01PM +0530, Niranjan H Y wrote:
>> Per SDCA specification, after writing REQUESTED_PS, drivers must
>> poll ACTUAL_PS until the target power state is reached.
>> Implement sdca_asoc_set_pde_state_sync() helper function for
>> changing the power state of the PDE widget and wait for the power
>> transition to happen or timeout.
>>
>> Changes include:
>> - Add sdca_asoc_set_pde_poll_sync() to handle write
>>   REQUESTED_PS register and poll ACTUAL_PS register until
>>   the target state is reached or timed out.
>> - Export function via sdca_asoc.h for use by SDCA-compliant drivers
>> - Refactor entity_pde_event() in sdca_asoc.c to use the helper
>>
>> Signed-off-by: Niranjan H Y <niranjan.hy@ti.com>
>> ---
>>  static int entity_parse_pde(struct device *dev,
>> @@ -449,8 +492,8 @@ static int entity_parse_pde(struct device *dev,
>>  	}
>>  
>>  	(*widget)->id = snd_soc_dapm_supply;
>> -	(*widget)->reg = SDW_SDCA_CTL(function->desc->adr, entity->id, control->sel, 0);
>> -	(*widget)->mask = GENMASK(control->nbits - 1, 0);
>> +	(*widget)->reg = SND_SOC_NOPM;
>> +	(*widget)->mask = 0;
> 
> Hmm... yeah I am really sorry I totally overlooked this. Yeah we
> should leave the write outside the helper it is much nicer to
> have DAPM do it.

Not following that comment, there are quite a few codecs that trap a DAPM event, do a regmap_write then wait with a loop, see e.g. rt722_sdca_pde47_event

I haven't seen DAPM deal directly with the write?
what am I missing?