Re: [alsa-devel] [PATCH] snd-opti9xx: Implement suspend/resume

[Rajeev kumar <rajeev-dlh.kumar@st.com>]

Hello Ondrej,

On 7/17/2012 12:46 PM, Ondrej Zary wrote:
> Implement suspend/resume support for Opti 92x and 93x chips.
> Tested with Opti 929A+AD1848 and Opti 931.
>
> Signed-off-by: Ondrej Zary<linux@rainbow-software.org>
>

<snip...>

> +#ifdef CONFIG_PM
> +static int snd_opti9xx_suspend(struct snd_card *card)
> +{
> +	struct snd_opti9xx *chip = card->private_data;
> +
> +	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
> +	chip->codec->suspend(chip->codec);
> +	return 0;
> +}
> +
> +static int snd_opti9xx_resume(struct snd_card *card)
> +{
> +	struct snd_opti9xx *chip = card->private_data;
> +	int error, xdma2;
> +#if defined(CS4231) || defined(OPTi93X)
> +	xdma2 = dma2;
> +#else
> +	xdma2 = -1;
> +#endif
> +
> +	error = snd_opti9xx_configure(chip, port, irq, dma1, xdma2,
> +				      mpu_port, mpu_irq);

dma1??

> +	if (error)
> +		return error;

Variable name is not convincing. You are assuming that the function is 
returning error.

> +	chip->codec->resume(chip->codec);
> +	snd_power_change_state(card, SNDRV_CTL_POWER_D0);

blank line required.

> +	return 0;
> +}
> +
> +static int snd_opti9xx_isa_suspend(struct device *dev, unsigned int n,
> +				   pm_message_t state)
> +{
> +	return snd_opti9xx_suspend(dev_get_drvdata(dev));
> +}
> +
> +static int snd_opti9xx_isa_resume(struct device *dev, unsigned int n)
> +{
> +	return snd_opti9xx_resume(dev_get_drvdata(dev));
> +}
> +#endif
> +
>   static struct isa_driver snd_opti9xx_driver = {
>   	.match		= snd_opti9xx_isa_match,
>   	.probe		= snd_opti9xx_isa_probe,
>   	.remove		= __devexit_p(snd_opti9xx_isa_remove),
> -	/* FIXME: suspend/resume */
> +#ifdef CONFIG_PM
> +	.suspend	= snd_opti9xx_isa_suspend,
> +	.resume		= snd_opti9xx_isa_resume,
> +#endif
>   	.driver		= {
>   		.name	= DEV_NAME
>   	},
> @@ -1123,12 +1165,29 @@ static void __devexit snd_opti9xx_pnp_remove(struct pnp_card_link * pcard)
>   	snd_opti9xx_pnp_is_probed = 0;
>   }
>
> +#ifdef CONFIG_PM
> +static int snd_opti9xx_pnp_suspend(struct pnp_card_link *pcard,
> +				   pm_message_t state)
> +{
> +	return snd_opti9xx_suspend(pnp_get_card_drvdata(pcard));
> +}
> +
> +static int snd_opti9xx_pnp_resume(struct pnp_card_link *pcard)
> +{
> +	return snd_opti9xx_resume(pnp_get_card_drvdata(pcard));
> +}
> +#endif
> +
>   static struct pnp_card_driver opti9xx_pnpc_driver = {
>   	.flags		= PNP_DRIVER_RES_DISABLE,
>   	.name		= "opti9xx",

Why this is opti why not OPTi

~Rajeev

>   	.id_table	= snd_opti9xx_pnpids,
>   	.probe		= snd_opti9xx_pnp_probe,
>   	.remove		= __devexit_p(snd_opti9xx_pnp_remove),
> +#ifdef CONFIG_PM
> +	.suspend	= snd_opti9xx_pnp_suspend,
> +	.resume		= snd_opti9xx_pnp_resume,
> +#endif
>   };
>   #endif
>
>