[PATCH] ASoC: fsl_micfil: Add DC output remover control

[Mark Brown]

On Mon, Apr 20, 2026 at 04:53:44PM +0800, Shengjiu Wang wrote:

> +static int micfil_put_dc_out_remover_state(struct snd_kcontrol *kcontrol,
> +					   struct snd_ctl_elem_value *ucontrol)
> +{

> +	if (val < 0 || val > 3)
> +		return -EINVAL;
> +
> +	ret = pm_runtime_resume_and_get(comp->dev);
> +	if (ret)
> +		return ret;
> +
> +	micfil->dc_out_remover = val;

...

> +	/* Update DC Remover mode for all channels */
> +	ret = snd_soc_component_update_bits(comp, REG_MICFIL_DC_OUT_CTRL,
> +					    MICFIL_DC_CTRL_CONFIG, reg_val);
> +
> +	pm_runtime_put_autosuspend(comp->dev);
> +
> +	return ret;

This will return 0 not 1 when the value changes, meaning event
generation is missed.  The mixer-test selftest should report this.
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