Re: [PATCH 4/4] ASoC: wm8524: Delay some time to follow power up sequency

[Mark Brown]

On Wed, Feb 22, 2023 at 07:39:45PM +0800, Chancel Liu wrote:

> +	switch (cmd) {
> +	case SNDRV_PCM_TRIGGER_START:
> +	case SNDRV_PCM_TRIGGER_RESUME:
> +	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
> +		mdelay(wm8524->power_up_delay);
> +		break;

Doing a 100ms busy wait in atomic context does not seem like a great
idea, never mind a 1.5s one.  This shouldn't be done in trigger, it
needs to be done later - digital_mute() might be a better time to hook
in, though longer delays like this are really quite bad.

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