Re: [v2 05/17] ASoC: mediatek: mt8186: support hw gain in platform driver

[AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>]

Il 17/02/22 14:41, Jiaxin Yu ha scritto:
> This path adds mt8186 hw gain dai driver.
> 
> Signed-off-by: Jiaxin Yu <jiaxin.yu@mediatek.com>
> ---
>   .../soc/mediatek/mt8186/mt8186-dai-hw-gain.c  | 245 ++++++++++++++++++
>   1 file changed, 245 insertions(+)
>   create mode 100644 sound/soc/mediatek/mt8186/mt8186-dai-hw-gain.c
> 
> diff --git a/sound/soc/mediatek/mt8186/mt8186-dai-hw-gain.c b/sound/soc/mediatek/mt8186/mt8186-dai-hw-gain.c
> new file mode 100644
> index 000000000000..796878989727
> --- /dev/null
> +++ b/sound/soc/mediatek/mt8186/mt8186-dai-hw-gain.c
> @@ -0,0 +1,245 @@
> +// SPDX-License-Identifier: GPL-2.0
> +//
> +// MediaTek ALSA SoC Audio DAI HW Gain Control
> +//
> +// Copyright (c) 2022 MediaTek Inc.
> +// Author: Jiaxin Yu <jiaxin.yu@mediatek.com>
> +
> +#include <linux/regmap.h>
> +#include "mt8186-afe-common.h"
> +#include "mt8186-interconnection.h"
> +
> +#define HW_GAIN_1_EN_W_NAME "HW GAIN 1 Enable"
> +#define HW_GAIN_2_EN_W_NAME "HW GAIN 2 Enable"
> +
> +/* dai component */
> +static const struct snd_kcontrol_new mtk_hw_gain1_in_ch1_mix[] = {
> +	SOC_DAPM_SINGLE_AUTODISABLE("CONNSYS_I2S_CH1 Switch", AFE_CONN13_1,
> +				    I_CONNSYS_I2S_CH1, 1, 0),
> +};
> +
> +static const struct snd_kcontrol_new mtk_hw_gain1_in_ch2_mix[] = {
> +	SOC_DAPM_SINGLE_AUTODISABLE("CONNSYS_I2S_CH2 Switch", AFE_CONN14_1,
> +				    I_CONNSYS_I2S_CH2, 1, 0),
> +};
> +
> +static const struct snd_kcontrol_new mtk_hw_gain2_in_ch1_mix[] = {
> +	SOC_DAPM_SINGLE_AUTODISABLE("ADDA_UL_CH1 Switch", AFE_CONN15,
> +				    I_ADDA_UL_CH1, 1, 0),
> +};
> +
> +static const struct snd_kcontrol_new mtk_hw_gain2_in_ch2_mix[] = {
> +	SOC_DAPM_SINGLE_AUTODISABLE("ADDA_UL_CH2 Switch", AFE_CONN16,
> +				    I_ADDA_UL_CH2, 1, 0),
> +};
> +
> +static int mtk_hw_gain_event(struct snd_soc_dapm_widget *w,
> +			     struct snd_kcontrol *kcontrol,
> +			     int event)
> +{
> +	struct snd_soc_component *cmpnt = snd_soc_dapm_to_component(w->dapm);
> +	struct mtk_base_afe *afe = snd_soc_component_get_drvdata(cmpnt);
> +	unsigned int gain_cur;
> +	unsigned int gain_con1;
> +
> +	dev_dbg(cmpnt->dev, "%s(), name %s, event 0x%x\n",
> +		__func__, w->name, event);
> +
> +	switch (event) {
> +	case SND_SOC_DAPM_PRE_PMU:
> +		if (strcmp(w->name, HW_GAIN_1_EN_W_NAME) == 0) {
> +			gain_cur = AFE_GAIN1_CUR;
> +			gain_con1 = AFE_GAIN1_CON1;
> +		} else {
> +			gain_cur = AFE_GAIN2_CUR;
> +			gain_con1 = AFE_GAIN2_CON1;
> +		}
> +
> +		/* let hw gain ramp up, set cur gain to 0 */
> +		regmap_update_bits(afe->regmap,
> +				   gain_cur,
> +				   AFE_GAIN1_CUR_MASK_SFT,
> +				   0);

This fits in one line (86 columns is ok)

> +
> +		/* set target gain to 0 */
> +		regmap_update_bits(afe->regmap,
> +				   gain_con1,
> +				   GAIN1_TARGET_MASK_SFT,
> +				   0);

Same here.

> +		break;
> +	default:
> +		break;
> +	}
> +
> +	return 0;
> +}
> +
> +static const struct snd_soc_dapm_widget mtk_dai_hw_gain_widgets[] = {
> +	/* inter-connections */
> +	SND_SOC_DAPM_MIXER("HW_GAIN1_IN_CH1", SND_SOC_NOPM, 0, 0,
> +			   mtk_hw_gain1_in_ch1_mix,
> +			   ARRAY_SIZE(mtk_hw_gain1_in_ch1_mix)),
> +	SND_SOC_DAPM_MIXER("HW_GAIN1_IN_CH2", SND_SOC_NOPM, 0, 0,
> +			   mtk_hw_gain1_in_ch2_mix,
> +			   ARRAY_SIZE(mtk_hw_gain1_in_ch2_mix)),
> +	SND_SOC_DAPM_MIXER("HW_GAIN2_IN_CH1", SND_SOC_NOPM, 0, 0,
> +			   mtk_hw_gain2_in_ch1_mix,
> +			   ARRAY_SIZE(mtk_hw_gain2_in_ch1_mix)),
> +	SND_SOC_DAPM_MIXER("HW_GAIN2_IN_CH2", SND_SOC_NOPM, 0, 0,
> +			   mtk_hw_gain2_in_ch2_mix,
> +			   ARRAY_SIZE(mtk_hw_gain2_in_ch2_mix)),
> +
> +	SND_SOC_DAPM_SUPPLY(HW_GAIN_1_EN_W_NAME,
> +			    AFE_GAIN1_CON0, GAIN1_ON_SFT, 0,
> +			    mtk_hw_gain_event,
> +			    SND_SOC_DAPM_PRE_PMU),
> +
> +	SND_SOC_DAPM_SUPPLY(HW_GAIN_2_EN_W_NAME,
> +			    AFE_GAIN2_CON0, GAIN2_ON_SFT, 0,
> +			    mtk_hw_gain_event,
> +			    SND_SOC_DAPM_PRE_PMU),
> +
> +	SND_SOC_DAPM_INPUT("HW Gain 1 Out Endpoint"),
> +	SND_SOC_DAPM_INPUT("HW Gain 2 Out Endpoint"),
> +	SND_SOC_DAPM_OUTPUT("HW Gain 1 In Endpoint"),
> +};
> +
> +static const struct snd_soc_dapm_route mtk_dai_hw_gain_routes[] = {
> +	{"HW Gain 1 In", NULL, "HW_GAIN1_IN_CH1"},
> +	{"HW Gain 1 In", NULL, "HW_GAIN1_IN_CH2"},
> +	{"HW Gain 2 In", NULL, "HW_GAIN2_IN_CH1"},
> +	{"HW Gain 2 In", NULL, "HW_GAIN2_IN_CH2"},
> +
> +	{"HW Gain 1 In", NULL, HW_GAIN_1_EN_W_NAME},
> +	{"HW Gain 1 Out", NULL, HW_GAIN_1_EN_W_NAME},
> +	{"HW Gain 2 In", NULL, HW_GAIN_2_EN_W_NAME},
> +	{"HW Gain 2 Out", NULL, HW_GAIN_2_EN_W_NAME},
> +
> +	{"HW Gain 1 In Endpoint", NULL, "HW Gain 1 In"},
> +	{"HW Gain 1 Out", NULL, "HW Gain 1 Out Endpoint"},
> +	{"HW Gain 2 Out", NULL, "HW Gain 2 Out Endpoint"},
> +};
> +
> +static const struct snd_kcontrol_new mtk_hw_gain_controls[] = {
> +	SOC_SINGLE("HW Gain 1 Volume", AFE_GAIN1_CON1,
> +		   GAIN1_TARGET_SFT, GAIN1_TARGET_MASK, 0),
> +	SOC_SINGLE("HW Gain 2 Volume", AFE_GAIN2_CON1,
> +		   GAIN2_TARGET_SFT, GAIN2_TARGET_MASK, 0),
> +};
> +
> +/* dai ops */
> +static int mtk_dai_gain_hw_params(struct snd_pcm_substream *substream,
> +				  struct snd_pcm_hw_params *params,
> +				  struct snd_soc_dai *dai)
> +{
> +	struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
> +	unsigned int rate = params_rate(params);
> +	unsigned int rate_reg = mt8186_rate_transform(afe->dev, rate, dai->id);
> +
> +	dev_info(afe->dev, "%s(), id %d, stream %d, rate %d\n",
> +		 __func__,
> +		 dai->id,
> +		 substream->stream,
> +		 rate);

This should be:
	dev_info(afe->dev, "%s(), id %d, stream %d, rate %d\n",

		 __func__, dai->id, substream->stream, rate);