Re: [v2 07/17] ASoC: mediatek: mt8186: support pcm in platform driver

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Il 17/02/22 14:41, Jiaxin Yu ha scritto:
This patch adds mt8186 pcm dai driver.

Signed-off-by: Jiaxin Yu <jiaxin.yu@xxxxxxxxxxxx>
---
  sound/soc/mediatek/mt8186/mt8186-dai-pcm.c | 432 +++++++++++++++++++++
  1 file changed, 432 insertions(+)
  create mode 100644 sound/soc/mediatek/mt8186/mt8186-dai-pcm.c

diff --git a/sound/soc/mediatek/mt8186/mt8186-dai-pcm.c b/sound/soc/mediatek/mt8186/mt8186-dai-pcm.c
new file mode 100644
index 000000000000..73b3f720ed35
--- /dev/null
+++ b/sound/soc/mediatek/mt8186/mt8186-dai-pcm.c
@@ -0,0 +1,432 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// MediaTek ALSA SoC Audio DAI I2S Control
+//
+// Copyright (c) 2022 MediaTek Inc.
+// Author: Jiaxin Yu <jiaxin.yu@xxxxxxxxxxxx>
+
+#include <linux/regmap.h>
+#include <sound/pcm_params.h>
+#include "mt8186-afe-common.h"
+#include "mt8186-afe-gpio.h"
+#include "mt8186-interconnection.h"
+
+struct mtk_afe_pcm_priv {
+	unsigned int id;
+	unsigned int fmt;
+	unsigned int bck_invert;
+	unsigned int lck_invert;
+};
+
+enum AUD_TX_LCH_RPT {

lowercase enumeration names please...

enum aud_tx_lch_rpt {
	AUD_TX....BLAH
};

+	AUD_TX_LCH_RPT_NO_REPEAT = 0,
+	AUD_TX_LCH_RPT_REPEAT = 1
+};
+
+enum AUD_VBT_16K_MODE {
+	AUD_VBT_16K_MODE_DISABLE = 0,
+	AUD_VBT_16K_MODE_ENABLE = 1
+};
+
+enum AUD_EXT_MODEM {
+	AUD_EXT_MODEM_SELECT_INTERNAL = 0,
+	AUD_EXT_MODEM_SELECT_EXTERNAL = 1
+};
+
+enum AUD_PCM_SYNC_TYPE {
+	/* bck sync length = 1 */
+	AUD_PCM_ONE_BCK_CYCLE_SYNC = 0,
+	/* bck sync length = PCM_INTF_CON1[9:13] */
+	AUD_PCM_EXTENDED_BCK_CYCLE_SYNC = 1
+};
+
+enum AUD_BT_MODE {
+	AUD_BT_MODE_DUAL_MIC_ON_TX = 0,
+	AUD_BT_MODE_SINGLE_MIC_ON_TX = 1
+};
+
+enum AUD_PCM_AFIFO_SRC {
+	/* slave mode & external modem uses different crystal */
+	AUD_PCM_AFIFO_ASRC = 0,
+	/* slave mode & external modem uses the same crystal */
+	AUD_PCM_AFIFO_AFIFO = 1
+};
+
+enum AUD_PCM_CLOCK_SOURCE {
+	AUD_PCM_CLOCK_MASTER_MODE = 0,
+	AUD_PCM_CLOCK_SLAVE_MODE = 1
+};
+
+enum AUD_PCM_WLEN {
+	AUD_PCM_WLEN_PCM_32_BCK_CYCLES = 0,
+	AUD_PCM_WLEN_PCM_64_BCK_CYCLES = 1
+};
+
+enum AUD_PCM_24BIT {
+	AUD_PCM_24BIT_PCM_16_BITS = 0,
+	AUD_PCM_24BIT_PCM_24_BITS = 1
+};
+
+enum AUD_PCM_MODE {
+	AUD_PCM_MODE_PCM_MODE_8K = 0,
+	AUD_PCM_MODE_PCM_MODE_16K = 1,
+	AUD_PCM_MODE_PCM_MODE_32K = 2,
+	AUD_PCM_MODE_PCM_MODE_48K = 3,
+};
+
+enum AUD_PCM_FMT {
+	AUD_PCM_FMT_I2S = 0,
+	AUD_PCM_FMT_EIAJ = 1,
+	AUD_PCM_FMT_PCM_MODE_A = 2,
+	AUD_PCM_FMT_PCM_MODE_B = 3
+};
+
+enum AUD_BCLK_OUT_INV {
+	AUD_BCLK_OUT_INV_NO_INVERSE = 0,
+	AUD_BCLK_OUT_INV_INVERSE = 1
+};
+
+enum AUD_LRCLK_OUT_INV {
+	AUD_LRCLK_OUT_INV_NO_INVERSE = 0,
+	AUD_LRCLK_OUT_INV_INVERSE = 1
+};
+
+enum AUD_PCM_EN {
+	AUD_PCM_EN_DISABLE = 0,
+	AUD_PCM_EN_ENABLE = 1
+};
+

..snip..

+
+/* dai ops */
+static int mtk_dai_pcm_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);
+	struct mt8186_afe_private *afe_priv = afe->platform_priv;
+	int pcm_id = dai->id;
+	struct mtk_afe_pcm_priv *pcm_priv = afe_priv->dai_priv[pcm_id];
+	unsigned int rate = params_rate(params);
+	unsigned int rate_reg = mt8186_rate_transform(afe->dev, rate, dai->id);
+	snd_pcm_format_t format = params_format(params);
+	unsigned int data_width =
+		snd_pcm_format_width(format);
+	unsigned int wlen_width =
+		snd_pcm_format_physical_width(format);
+	unsigned int pcm_con = 0;
+
+	dev_info(afe->dev, "%s(), id %d, stream %d, widget active p %d, c %d\n",
+		 __func__,
+		 dai->id,
+		 substream->stream,
+		 dai->playback_widget->active,
+		 dai->capture_widget->active);
+	dev_info(afe->dev, "%s(), rate %d, rate_reg %d, data_width %d, wlen_width %d\n",
+		 __func__,
+		 rate,
+		 rate_reg,
+		 data_width,
+		 wlen_width);

dev_dbg() - also, you don't need one line per variable.

+
+	if (dai->playback_widget->active || dai->capture_widget->active)
+		return 0;
+
+	switch (dai->id) {
+	case MT8186_DAI_PCM:
+		pcm_con |= AUD_TX_LCH_RPT_NO_REPEAT << PCM_TX_LCH_RPT_SFT;
+		pcm_con |= AUD_VBT_16K_MODE_DISABLE << PCM_VBT_16K_MODE_SFT;
+		pcm_con |= AUD_EXT_MODEM_SELECT_EXTERNAL << PCM_EXT_MODEM_SFT;
+		pcm_con |= AUD_PCM_ONE_BCK_CYCLE_SYNC << PCM_SYNC_TYPE_SFT;
+		pcm_con |= AUD_BT_MODE_DUAL_MIC_ON_TX << PCM_BT_MODE_SFT;
+		pcm_con |= AUD_PCM_AFIFO_AFIFO << PCM_BYP_ASRC_SFT;
+		pcm_con |= AUD_PCM_CLOCK_MASTER_MODE << PCM_SLAVE_SFT;
+		pcm_con |= 0 << PCM_SYNC_LENGTH_SFT;
+
+		/* sampling rate */
+		pcm_con |= rate_reg << PCM_MODE_SFT;
+
+		/* format */
+		pcm_con |= pcm_priv->fmt << PCM_FMT_SFT;
+
+		/* 24bit data width */
+		if (data_width > 16)
+			pcm_con |= AUD_PCM_24BIT_PCM_24_BITS << PCM_24BIT_SFT;
+		else
+			pcm_con |= AUD_PCM_24BIT_PCM_16_BITS << PCM_24BIT_SFT;
+
+		/* wlen width*/
+		if (wlen_width > 16)
+			pcm_con |= AUD_PCM_WLEN_PCM_64_BCK_CYCLES << PCM_WLEN_SFT;
+		else
+			pcm_con |= AUD_PCM_WLEN_PCM_32_BCK_CYCLES << PCM_WLEN_SFT;
+
+		/* clock invert */
+		pcm_con |= pcm_priv->lck_invert << PCM_SYNC_OUT_INV_SFT;
+		pcm_con |= pcm_priv->bck_invert << PCM_BCLK_OUT_INV_SFT;
+
+		regmap_update_bits(afe->regmap, PCM_INTF_CON1,
+				   0xfffffffe, pcm_con);

Fits in one line.

+		break;
+	default:
+		dev_info(afe->dev, "%s(), id %d not support\n",
+			 __func__, dai->id);

dev_err()

+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int mtk_dai_pcm_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+	struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
+	struct mt8186_afe_private *afe_priv = afe->platform_priv;
+	struct mtk_afe_pcm_priv *pcm_priv = afe_priv->dai_priv[dai->id];
+
+	if (!pcm_priv) {
+		dev_info(afe->dev, "%s(), tdm_priv == NULL", __func__);

dev_err()

+		return -EINVAL;
+	}
+



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