Re: [PATCH v3 02/13] ASoC: amd: acp: add ACP7.B/7.F SoundWire DAI link support

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

It'd be useful to comment/explain why this routine only relies on a
subset of IDS...

> +int get_acp7x_cpu_pin_id(u32 sdw_link_id, int be_id, int *cpu_pin_id, struct device *dev)
> +{
> +	switch (sdw_link_id) {
> +	case AMD_SDW0:
> +	case AMD_SDW1:
> +	case AMD_SDW2:
> +	case AMD_SDW3:
> +		switch (be_id) {
> +		case SOC_SDW_JACK_OUT_DAI_ID:
> +			*cpu_pin_id = ACP7X_SW_AUDIO0_TX;
> +			break;
> +		case SOC_SDW_JACK_IN_DAI_ID:
> +			*cpu_pin_id = ACP7X_SW_AUDIO0_RX;
> +			break;
> +		case SOC_SDW_AMP_OUT_DAI_ID:
> +			*cpu_pin_id = ACP7X_SW_AUDIO4_TX;
> +			break;
> +		case SOC_SDW_AMP_IN_DAI_ID:
> +			*cpu_pin_id = ACP7X_SW_AUDIO4_RX;
> +			break;
> +		case SOC_SDW_DMIC_DAI_ID:
> +			*cpu_pin_id = ACP7X_SW_AUDIO5_RX;
> +			break;
> +		default:
> +			dev_err(dev, "Invalid be id:%d\n", be_id);
> +			return -EINVAL;
> +		}
> +		break;
> +	default:
> +		return -EINVAL;
> +	}
> +	dev_dbg(dev, "sdw_link_id:%d, be_id:%d, cpu_pin_id:%d\n", sdw_link_id, be_id, *cpu_pin_id);
> +	return 0;
> +}

... defined here - I marked the NOT USED ones.

> +/* ACP7.B/7.F SoundWire CPU pin IDs */
> +#define ACP7X_SW_AUDIO0_TX	0
> +#define ACP7X_SW_AUDIO1_TX	1 << NOT USED
> +#define ACP7X_SW_AUDIO2_TX	2 << NOT USED
> +#define ACP7X_SW_AUDIO3_TX	3 << NOT USED
> +#define ACP7X_SW_AUDIO4_TX	4 
> +#define ACP7X_SW_AUDIO5_TX	5 << NOT USED
> +#define ACP7X_SW_AUDIO6_TX	6 << NOT USED
> +#define ACP7X_SW_AUDIO7_TX	7 << NOT USED
> +#define ACP7X_SW_AUDIO8_TX	8 << NOT USED
> +#define ACP7X_SW_AUDIO9_TX	9 << NOT USED
> +#define ACP7X_SW_AUDIO10_TX	10 << NOT USED
> +
> +#define ACP7X_SW_AUDIO0_RX	11
> +#define ACP7X_SW_AUDIO1_RX	12 << NOT USED
> +#define ACP7X_SW_AUDIO2_RX	13 << NOT USED
> +#define ACP7X_SW_AUDIO3_RX	14 << NOT USED
> +#define ACP7X_SW_AUDIO4_RX	15
> +#define ACP7X_SW_AUDIO5_RX	16
> +#define ACP7X_SW_AUDIO6_RX	17 << NOT USED
> +#define ACP7X_SW_AUDIO7_RX	18 << NOT USED
> +#define ACP7X_SW_AUDIO8_RX	19 << NOT USED
The IDs are different from what was used for ACP70