[2/2] ASoC: qcom: sc7180: Add support for qdsp6 baked sound

Some sc7180 devices use audio adsp to play sound. The setup for this
adsp is similar to the dirrect lpass usage but requires the use of
different link ids and clocks.

This commit adds support for the qdsp based audio, reusing the common
parts like audio codec setup and jack creation.

Since the setup is mostly generic and codec specific setup is guarded
behind a check, a generic compatible is added, similar to other
platforms. Even though those changes target Acer Aspire 1 as the only
user of the adsp audio on this platform present upstream at the moment
of the commit, those changes should be either dirrectly compatible or
trivially expandable to the other devices that will be added in the
future.

Signed-off-by: Nikita Travkin <nikita@trvn.ru>
---
 sound/soc/qcom/sc7180.c | 195 ++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 173 insertions(+), 22 deletions(-)

On 10/20/23 18:33, Nikita Travkin wrote:
> Some sc7180 devices use audio adsp to play sound. The setup for this
> adsp is similar to the dirrect lpass usage but requires the use of
> different link ids and clocks.
>
> This commit adds support for the qdsp based audio, reusing the common
> parts like audio codec setup and jack creation.
>
> Since the setup is mostly generic and codec specific setup is guarded
> behind a check, a generic compatible is added, similar to other
> platforms. Even though those changes target Acer Aspire 1 as the only
> user of the adsp audio on this platform present upstream at the moment
> of the commit, those changes should be either dirrectly compatible or
> trivially expandable to the other devices that will be added in the
> future.
>
> Signed-off-by: Nikita Travkin <nikita@trvn.ru>

Tested that sound still works on lazor chromebook

Tested-by: Anton Bambura <jenneron@postmarketos.org>

> ---
>   sound/soc/qcom/sc7180.c | 195 ++++++++++++++++++++++++++++++++++++++++++------
>   1 file changed, 173 insertions(+), 22 deletions(-)
>
> diff --git a/sound/soc/qcom/sc7180.c b/sound/soc/qcom/sc7180.c
> index 8e433e309f77..b0320a74d508 100644
> --- a/sound/soc/qcom/sc7180.c
> +++ b/sound/soc/qcom/sc7180.c
> @@ -5,6 +5,7 @@
>   // sc7180.c -- ALSA SoC Machine driver for SC7180
>   
>   #include <dt-bindings/sound/sc7180-lpass.h>
> +#include <dt-bindings/sound/qcom,q6afe.h>
>   #include <linux/gpio.h>
>   #include <linux/gpio/consumer.h>
>   #include <linux/module.h>
> @@ -19,8 +20,10 @@
>   #include "../codecs/rt5682.h"
>   #include "../codecs/rt5682s.h"
>   #include "common.h"
> +#include "qdsp6/q6afe.h"
>   
>   #define DEFAULT_MCLK_RATE		19200000
> +#define MI2S_BCLK_RATE			1536000
>   #define RT5682_PLL1_FREQ (48000 * 512)
>   
>   #define DRIVER_NAME "SC7180"
> @@ -133,12 +136,28 @@ static int sc7180_init(struct snd_soc_pcm_runtime *rtd)
>   	return 0;
>   }
>   
> -static int sc7180_snd_startup(struct snd_pcm_substream *substream)
> +static int sc7180_qdsp_init(struct snd_soc_pcm_runtime *rtd)
>   {
> -	struct snd_soc_pcm_runtime *rtd = substream->private_data;
> -	struct snd_soc_card *card = rtd->card;
> -	struct sc7180_snd_data *data = snd_soc_card_get_drvdata(card);
>   	struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
> +
> +	switch (cpu_dai->id) {
> +	case PRIMARY_MI2S_RX:
> +		return sc7180_headset_init(rtd);
> +	case PRIMARY_MI2S_TX:
> +	case TERTIARY_MI2S_RX:
> +		return 0;
> +	case DISPLAY_PORT_RX:
> +		return sc7180_hdmi_init(rtd);
> +	default:
> +		dev_err(rtd->dev, "%s: invalid dai id 0x%x\n", __func__,
> +			cpu_dai->id);
> +		return -EINVAL;
> +	}
> +	return 0;
> +}
> +
> +static int sc7180_startup_realtek_codec(struct snd_soc_pcm_runtime *rtd)
> +{
>   	struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
>   	int pll_id, pll_source, pll_in, pll_out, clk_id, ret;
>   
> @@ -154,8 +173,40 @@ static int sc7180_snd_startup(struct snd_pcm_substream *substream)
>   		clk_id = RT5682S_SCLK_S_PLL2;
>   		pll_out = RT5682_PLL1_FREQ;
>   		pll_in = DEFAULT_MCLK_RATE;
> +	} else {
> +		return 0;
> +	}
> +	snd_soc_dai_set_fmt(codec_dai,
> +			    SND_SOC_DAIFMT_BC_FC |
> +			    SND_SOC_DAIFMT_NB_NF |
> +			    SND_SOC_DAIFMT_I2S);
> +
> +	/* Configure PLL1 for codec */
> +	ret = snd_soc_dai_set_pll(codec_dai, pll_id, pll_source,
> +				  pll_in, pll_out);
> +	if (ret) {
> +		dev_err(rtd->dev, "can't set codec pll: %d\n", ret);
> +		return ret;
>   	}
>   
> +	/* Configure sysclk for codec */
> +	ret = snd_soc_dai_set_sysclk(codec_dai, clk_id, pll_out,
> +				     SND_SOC_CLOCK_IN);
> +	if (ret)
> +		dev_err(rtd->dev, "snd_soc_dai_set_sysclk err = %d\n",
> +			ret);
> +
> +	return ret;
> +}
> +
> +static int sc7180_snd_startup(struct snd_pcm_substream *substream)
> +{
> +	struct snd_soc_pcm_runtime *rtd = substream->private_data;
> +	struct snd_soc_card *card = rtd->card;
> +	struct sc7180_snd_data *data = snd_soc_card_get_drvdata(card);
> +	struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
> +	int ret;
> +
>   	switch (cpu_dai->id) {
>   	case MI2S_PRIMARY:
>   		if (++data->pri_mi2s_clk_count == 1) {
> @@ -165,30 +216,66 @@ static int sc7180_snd_startup(struct snd_pcm_substream *substream)
>   					       SNDRV_PCM_STREAM_PLAYBACK);
>   		}
>   
> -		snd_soc_dai_set_fmt(codec_dai,
> -				    SND_SOC_DAIFMT_BC_FC |
> -				    SND_SOC_DAIFMT_NB_NF |
> -				    SND_SOC_DAIFMT_I2S);
> -
> -		/* Configure PLL1 for codec */
> -		ret = snd_soc_dai_set_pll(codec_dai, pll_id, pll_source,
> -					  pll_in, pll_out);
> -		if (ret) {
> -			dev_err(rtd->dev, "can't set codec pll: %d\n", ret);
> +		ret = sc7180_startup_realtek_codec(rtd);
> +		if (ret)
>   			return ret;
> +
> +		break;
> +	case MI2S_SECONDARY:
> +		break;
> +	case LPASS_DP_RX:
> +		break;
> +	default:
> +		dev_err(rtd->dev, "%s: invalid dai id 0x%x\n", __func__,
> +			cpu_dai->id);
> +		return -EINVAL;
> +	}
> +	return 0;
> +}
> +
> +static int sc7180_qdsp_snd_startup(struct snd_pcm_substream *substream)
> +{
> +	struct snd_soc_pcm_runtime *rtd = substream->private_data;
> +	struct snd_soc_card *card = rtd->card;
> +	struct sc7180_snd_data *data = snd_soc_card_get_drvdata(card);
> +	struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
> +	struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
> +	int ret;
> +
> +	switch (cpu_dai->id) {
> +	case PRIMARY_MI2S_RX:
> +	case PRIMARY_MI2S_TX:
> +		if (++data->pri_mi2s_clk_count == 1) {
> +			snd_soc_dai_set_sysclk(cpu_dai,
> +					       Q6AFE_LPASS_CLK_ID_MCLK_1,
> +					       DEFAULT_MCLK_RATE,
> +					       SNDRV_PCM_STREAM_PLAYBACK);
> +			snd_soc_dai_set_sysclk(cpu_dai,
> +					       Q6AFE_LPASS_CLK_ID_PRI_MI2S_IBIT,
> +					       MI2S_BCLK_RATE,
> +					       SNDRV_PCM_STREAM_PLAYBACK);
>   		}
>   
> -		/* Configure sysclk for codec */
> -		ret = snd_soc_dai_set_sysclk(codec_dai, clk_id, pll_out,
> -					     SND_SOC_CLOCK_IN);
> +		snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_BP_FP);
> +
> +		ret = sc7180_startup_realtek_codec(rtd);
>   		if (ret)
> -			dev_err(rtd->dev, "snd_soc_dai_set_sysclk err = %d\n",
> -				ret);
> +			return ret;
>   
>   		break;
> -	case MI2S_SECONDARY:
> +	case TERTIARY_MI2S_RX:
> +		snd_soc_dai_set_sysclk(cpu_dai,
> +				       Q6AFE_LPASS_CLK_ID_TER_MI2S_IBIT,
> +				       MI2S_BCLK_RATE,
> +				       SNDRV_PCM_STREAM_PLAYBACK);
> +
> +		snd_soc_dai_set_fmt(codec_dai,
> +				SND_SOC_DAIFMT_BC_FC |
> +				SND_SOC_DAIFMT_NB_NF |
> +				SND_SOC_DAIFMT_I2S);
> +		snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_BP_FP);
>   		break;
> -	case LPASS_DP_RX:
> +	case DISPLAY_PORT_RX:
>   		break;
>   	default:
>   		dev_err(rtd->dev, "%s: invalid dai id 0x%x\n", __func__,
> @@ -246,6 +333,42 @@ static void sc7180_snd_shutdown(struct snd_pcm_substream *substream)
>   	}
>   }
>   
> +static void sc7180_qdsp_snd_shutdown(struct snd_pcm_substream *substream)
> +{
> +	struct snd_soc_pcm_runtime *rtd = substream->private_data;
> +	struct snd_soc_card *card = rtd->card;
> +	struct sc7180_snd_data *data = snd_soc_card_get_drvdata(card);
> +	struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
> +
> +	switch (cpu_dai->id) {
> +	case PRIMARY_MI2S_RX:
> +	case PRIMARY_MI2S_TX:
> +		if (--data->pri_mi2s_clk_count == 0) {
> +			snd_soc_dai_set_sysclk(cpu_dai,
> +					       Q6AFE_LPASS_CLK_ID_MCLK_1,
> +					       0,
> +					       SNDRV_PCM_STREAM_PLAYBACK);
> +			snd_soc_dai_set_sysclk(cpu_dai,
> +					       Q6AFE_LPASS_CLK_ID_PRI_MI2S_IBIT,
> +					       0,
> +					       SNDRV_PCM_STREAM_PLAYBACK);
> +		}
> +		break;
> +	case TERTIARY_MI2S_RX:
> +		snd_soc_dai_set_sysclk(cpu_dai,
> +				       Q6AFE_LPASS_CLK_ID_TER_MI2S_IBIT,
> +				       0,
> +				       SNDRV_PCM_STREAM_PLAYBACK);
> +		break;
> +	case DISPLAY_PORT_RX:
> +		break;
> +	default:
> +		dev_err(rtd->dev, "%s: invalid dai id 0x%x\n", __func__,
> +			cpu_dai->id);
> +		break;
> +	}
> +}
> +
>   static int sc7180_adau7002_init(struct snd_soc_pcm_runtime *rtd)
>   {
>   	struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
> @@ -294,11 +417,30 @@ static int sc7180_adau7002_snd_startup(struct snd_pcm_substream *substream)
>   	return 0;
>   }
>   
> +static int sc7180_qdsp_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
> +				     struct snd_pcm_hw_params *params)
> +{
> +	struct snd_interval *rate = hw_param_interval(params,
> +					SNDRV_PCM_HW_PARAM_RATE);
> +	struct snd_interval *channels = hw_param_interval(params,
> +					SNDRV_PCM_HW_PARAM_CHANNELS);
> +
> +	rate->min = rate->max = 48000;
> +	channels->min = channels->max = 2;
> +
> +	return 0;
> +}
> +
>   static const struct snd_soc_ops sc7180_ops = {
>   	.startup = sc7180_snd_startup,
>   	.shutdown = sc7180_snd_shutdown,
>   };
>   
> +static const struct snd_soc_ops sc7180_qdsp_ops = {
> +	.startup = sc7180_qdsp_snd_startup,
> +	.shutdown = sc7180_qdsp_snd_shutdown,
> +};
> +
>   static const struct snd_soc_ops sc7180_adau7002_ops = {
>   	.startup = sc7180_adau7002_snd_startup,
>   };
> @@ -354,7 +496,7 @@ static int sc7180_snd_platform_probe(struct platform_device *pdev)
>   	struct snd_soc_dai_link *link;
>   	int ret;
>   	int i;
> -	bool no_headphone = false;
> +	bool qdsp = false, no_headphone = false;
>   
>   	/* Allocate the private data */
>   	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
> @@ -390,6 +532,8 @@ static int sc7180_snd_platform_probe(struct platform_device *pdev)
>   		no_headphone = true;
>   		card->dapm_widgets = sc7180_adau7002_snd_widgets;
>   		card->num_dapm_widgets = ARRAY_SIZE(sc7180_adau7002_snd_widgets);
> +	} else if (of_device_is_compatible(dev->of_node, "qcom,sc7180-qdsp6-sndcard")) {
> +		qdsp = true;
>   	}
>   
>   	ret = qcom_snd_parse_of(card);
> @@ -400,6 +544,12 @@ static int sc7180_snd_platform_probe(struct platform_device *pdev)
>   		if (no_headphone) {
>   			link->ops = &sc7180_adau7002_ops;
>   			link->init = sc7180_adau7002_init;
> +		} else if (qdsp) {
> +			if (link->no_pcm == 1) {
> +				link->ops = &sc7180_qdsp_ops;
> +				link->be_hw_params_fixup = sc7180_qdsp_be_hw_params_fixup;
> +				link->init = sc7180_qdsp_init;
> +			}
>   		} else {
>   			link->ops = &sc7180_ops;
>   			link->init = sc7180_init;
> @@ -412,6 +562,7 @@ static int sc7180_snd_platform_probe(struct platform_device *pdev)
>   static const struct of_device_id sc7180_snd_device_id[]  = {
>   	{.compatible = "google,sc7180-trogdor"},
>   	{.compatible = "google,sc7180-coachz"},
> +	{.compatible = "qcom,sc7180-qdsp6-sndcard"},
>   	{},
>   };
>   MODULE_DEVICE_TABLE(of, sc7180_snd_device_id);
>