Re: [PATCH 3/4] ASoC: amd: acp: Add machine driver that enables sound for systems with a ES8336 codec

[Mark Brown <broonie@kernel.org>]

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On Wed, Mar 22, 2023 at 12:17:24AM +0200, Marian Postevca wrote:
> Mark Brown <broonie@kernel.org> writes:

> >> +	if (SND_SOC_DAPM_EVENT_ON(event))
> >> +		acp3x_es83xx_set_gpios_values(priv, 1, 0);
> >> +	else
> >> +		acp3x_es83xx_set_gpios_values(priv, 0, 1);

> > Why are these two GPIOs tied together like this?

> These GPIOs represent the speaker and the headphone switches. When
> activating the speaker GPIO you have to deactivate the headphone GPIO
> and vice versa. The logic is taken from the discussion on the sofproject
> pull request:
> https://github.com/thesofproject/linux/pull/4112/commits/810d03e0aecdf0caf580a5179ee6873fb33485ab
> and
> https://github.com/thesofproject/linux/pull/4066

Sure, but that doesn't answer the question.  What is the reason
they're tied together - what if someone wants to play back from
both speaker and headphones simultaneously?

> >> +static int acp3x_es83xx_suspend_pre(struct snd_soc_card *card)
> >> +{
> >> +	struct acp3x_es83xx_private *priv = get_mach_priv(card);
> >> +
> >> +	dev_dbg(priv->codec_dev, "card suspend\n");
> >> +	snd_soc_component_set_jack(priv->codec, NULL, NULL);
> >> +	return 0;
> >> +}

> > That's weird, why do that?

> This is needed because if suspending the laptop with the headphones
> inserted, when resuming, the sound is not working anymore. Sound stops
> working on speakers and headphones. Reinsertion and removals of the
> headphone doesn't solve the problem.

> This seems to be caused by the fact
> that the GPIO IRQ stops working in es8316_irq() after resume.

That's a bug that should be fixed.

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