Re: [v3 09/19] ASoC: mediatek: mt8186: support src in platform driver

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Il 13/03/22 16:10, Jiaxin Yu ha scritto:

Add mt8186 src dai driver

Signed-off-by: Jiaxin Yu <jiaxin.yu@xxxxxxxxxxxx>
---
  sound/soc/mediatek/mt8186/mt8186-dai-src.c | 726 +++++++++++++++++++++
  1 file changed, 726 insertions(+)
  create mode 100644 sound/soc/mediatek/mt8186/mt8186-dai-src.c

diff --git a/sound/soc/mediatek/mt8186/mt8186-dai-src.c b/sound/soc/mediatek/mt8186/mt8186-dai-src.c
new file mode 100644
index 000000000000..0277cb0ad3f2
--- /dev/null
+++ b/sound/soc/mediatek/mt8186/mt8186-dai-src.c
@@ -0,0 +1,726 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+//  MediaTek ALSA SoC Audio DAI SRC Control
+//
+// Copyright (c) 2022 MediaTek Inc.
+// Author: Jiaxin Yu <jiaxin.yu@xxxxxxxxxxxx>
+
+#include <linux/regmap.h>
+#include "mt8186-afe-common.h"
+#include "mt8186-interconnection.h"
+


..snip..


+
+static const unsigned int *get_iir_coeff(unsigned int rate_in,
+					 unsigned int rate_out,
+					 unsigned int *param_num)
+{
+	if (rate_in == 32000 && rate_out == 16000) {
+		*param_num = ARRAY_SIZE(src_iir_coeff_32_to_16);
+		return src_iir_coeff_32_to_16;
+	} else if (rate_in == 44100 && rate_out == 16000) {
+		*param_num = ARRAY_SIZE(src_iir_coeff_44_to_16);
+		return src_iir_coeff_44_to_16;
+	} else if (rate_in == 44100 && rate_out == 32000) {
+		*param_num = ARRAY_SIZE(src_iir_coeff_44_to_32);
+		return src_iir_coeff_44_to_32;
+	} else if ((rate_in == 48000 && rate_out == 16000) ||
+		   (rate_in == 96000 && rate_out == 32000)) {
+		*param_num = ARRAY_SIZE(src_iir_coeff_48_to_16);
+		return src_iir_coeff_48_to_16;
+	} else if (rate_in == 48000 && rate_out == 32000) {
+		*param_num = ARRAY_SIZE(src_iir_coeff_48_to_32);
+		return src_iir_coeff_48_to_32;
+	} else if (rate_in == 48000 && rate_out == 44100) {
+		*param_num = ARRAY_SIZE(src_iir_coeff_48_to_44);
+		return src_iir_coeff_48_to_44;
+	} else if (rate_in == 96000 && rate_out == 16000) {
+		*param_num = ARRAY_SIZE(src_iir_coeff_96_to_16);
+		return src_iir_coeff_96_to_16;
+	} else if ((rate_in == 96000 && rate_out == 44100) ||
+		   (rate_in == 48000 && rate_out == 22050)) {
+		*param_num = ARRAY_SIZE(src_iir_coeff_96_to_44);
+		return src_iir_coeff_96_to_44;
+	}
+
+	*param_num = 0;
+	return NULL;
+}
+
+#define DEBUG_COEFF


I think that this debugging hackery unintentionally slipped through... or was
that intentional?
In the latter case, if you want to provide a way to debug that, you should
use debugfs instead...

Please, either remove this debugging code, or use debugfs.

Thanks,
Angelo


+static int mtk_set_src_1_param(struct mtk_base_afe *afe, int id)
+{
+	struct mt8186_afe_private *afe_priv = afe->platform_priv;
+	struct mtk_afe_src_priv *src_priv = afe_priv->dai_priv[id];
+	unsigned int iir_coeff_num;
+	unsigned int iir_stage;
+	int rate_in = src_priv->dl_rate;
+	int rate_out = src_priv->ul_rate;
+	unsigned int out_freq_mode = mtk_get_src_freq_mode(afe, rate_out);
+	unsigned int in_freq_mode = mtk_get_src_freq_mode(afe, rate_in);
+
+	/* set out freq mode */
+	regmap_update_bits(afe->regmap, AFE_GENERAL1_ASRC_2CH_CON3,
+			   G_SRC_ASM_FREQ_4_MASK_SFT,
+			   out_freq_mode << G_SRC_ASM_FREQ_4_SFT);
+
+	/* set in freq mode */
+	regmap_update_bits(afe->regmap, AFE_GENERAL1_ASRC_2CH_CON4,
+			   G_SRC_ASM_FREQ_5_MASK_SFT,
+			   in_freq_mode << G_SRC_ASM_FREQ_5_SFT);
+
+	regmap_write(afe->regmap, AFE_GENERAL1_ASRC_2CH_CON5, 0x3f5986);
+	regmap_write(afe->regmap, AFE_GENERAL1_ASRC_2CH_CON5, 0x3f5987);
+	regmap_write(afe->regmap, AFE_GENERAL1_ASRC_2CH_CON6, 0x1fbd);
+	regmap_write(afe->regmap, AFE_GENERAL1_ASRC_2CH_CON2, 0);
+
+	/* set iir if in_rate > out_rate */
+	if (rate_in > rate_out) {
+		int i;
+#ifdef DEBUG_COEFF
+		int reg_val;
+#endif
+		const unsigned int *iir_coeff = get_iir_coeff(rate_in, rate_out,
+							      &iir_coeff_num);
+
+		if (iir_coeff_num == 0 || !iir_coeff) {
+			dev_err(afe->dev, "%s(), iir coeff error, num %d, coeff %p\n",
+				__func__, iir_coeff_num, iir_coeff);
+			return -EINVAL;
+		}
+
+		/* COEFF_SRAM_CTRL */
+		regmap_update_bits(afe->regmap, AFE_GENERAL1_ASRC_2CH_CON0,
+				   G_SRC_COEFF_SRAM_CTRL_MASK_SFT,
+				   BIT(G_SRC_COEFF_SRAM_CTRL_SFT));
+		/* Clear coeff history to r/w coeff from the first position */
+		regmap_update_bits(afe->regmap, AFE_GENERAL1_ASRC_2CH_CON13,
+				   G_SRC_COEFF_SRAM_ADR_MASK_SFT, 0);
+		/* Write SRC coeff, should not read the reg during write */
+		for (i = 0; i < iir_coeff_num; i++)
+			regmap_write(afe->regmap, AFE_GENERAL1_ASRC_2CH_CON12,
+				     iir_coeff[i]);
+
+#ifdef DEBUG_COEFF
+		regmap_update_bits(afe->regmap, AFE_GENERAL1_ASRC_2CH_CON13,
+				   G_SRC_COEFF_SRAM_ADR_MASK_SFT, 0);
+
+		for (i = 0; i < iir_coeff_num; i++) {
+			regmap_read(afe->regmap, AFE_GENERAL1_ASRC_2CH_CON12,
+				    &reg_val);
+			dev_info(afe->dev, "%s(), i = %d, coeff = 0x%x\n",
+				 __func__, i, reg_val);
+		}
+#endif
+		/* disable sram access */
+		regmap_update_bits(afe->regmap, AFE_GENERAL1_ASRC_2CH_CON0,
+				   G_SRC_COEFF_SRAM_CTRL_MASK_SFT, 0);
+		/* CHSET_IIR_STAGE */
+		iir_stage = (iir_coeff_num / 6) - 1;
+		regmap_update_bits(afe->regmap, AFE_GENERAL1_ASRC_2CH_CON2,
+				   G_SRC_CHSET_IIR_STAGE_MASK_SFT,
+				   iir_stage << G_SRC_CHSET_IIR_STAGE_SFT);
+		/* CHSET_IIR_EN */
+		regmap_update_bits(afe->regmap, AFE_GENERAL1_ASRC_2CH_CON2,
+				   G_SRC_CHSET_IIR_EN_MASK_SFT,
+				   BIT(G_SRC_CHSET_IIR_EN_SFT));
+	} else {
+		/* CHSET_IIR_EN off */
+		regmap_update_bits(afe->regmap, AFE_GENERAL1_ASRC_2CH_CON2,
+				   G_SRC_CHSET_IIR_EN_MASK_SFT, 0);
+	}
+
+	return 0;
+}
+
+static int mtk_set_src_2_param(struct mtk_base_afe *afe, int id)
+{
+	struct mt8186_afe_private *afe_priv = afe->platform_priv;
+	struct mtk_afe_src_priv *src_priv = afe_priv->dai_priv[id];
+	unsigned int iir_coeff_num;
+	unsigned int iir_stage;
+	int rate_in = src_priv->dl_rate;
+	int rate_out = src_priv->ul_rate;
+	unsigned int out_freq_mode = mtk_get_src_freq_mode(afe, rate_out);
+	unsigned int in_freq_mode = mtk_get_src_freq_mode(afe, rate_in);
+
+	/* set out freq mode */
+	regmap_update_bits(afe->regmap, AFE_GENERAL2_ASRC_2CH_CON3,
+			   G_SRC_ASM_FREQ_4_MASK_SFT,
+			   out_freq_mode << G_SRC_ASM_FREQ_4_SFT);
+
+	/* set in freq mode */
+	regmap_update_bits(afe->regmap, AFE_GENERAL2_ASRC_2CH_CON4,
+			   G_SRC_ASM_FREQ_5_MASK_SFT,
+			   in_freq_mode << G_SRC_ASM_FREQ_5_SFT);
+
+	regmap_write(afe->regmap, AFE_GENERAL2_ASRC_2CH_CON5, 0x3f5986);
+	regmap_write(afe->regmap, AFE_GENERAL2_ASRC_2CH_CON5, 0x3f5987);
+	regmap_write(afe->regmap, AFE_GENERAL2_ASRC_2CH_CON6, 0x1fbd);
+	regmap_write(afe->regmap, AFE_GENERAL2_ASRC_2CH_CON2, 0);
+
+	/* set iir if in_rate > out_rate */
+	if (rate_in > rate_out) {
+		int i;
+#ifdef DEBUG_COEFF
+		int reg_val;
+#endif
+		const unsigned int *iir_coeff = get_iir_coeff(rate_in, rate_out,
+							      &iir_coeff_num);
+
+		if (iir_coeff_num == 0 || !iir_coeff) {
+			dev_err(afe->dev, "%s(), iir coeff error, num %d, coeff %p\n",
+				 __func__, iir_coeff_num, iir_coeff);
+			return -EINVAL;
+		}
+
+		/* COEFF_SRAM_CTRL */
+		regmap_update_bits(afe->regmap, AFE_GENERAL2_ASRC_2CH_CON0,
+				   G_SRC_COEFF_SRAM_CTRL_MASK_SFT,
+				   BIT(G_SRC_COEFF_SRAM_CTRL_SFT));
+		/* Clear coeff history to r/w coeff from the first position */
+		regmap_update_bits(afe->regmap, AFE_GENERAL2_ASRC_2CH_CON13,
+				   G_SRC_COEFF_SRAM_ADR_MASK_SFT, 0);
+		/* Write SRC coeff, should not read the reg during write */
+		for (i = 0; i < iir_coeff_num; i++)
+			regmap_write(afe->regmap, AFE_GENERAL2_ASRC_2CH_CON12,
+				     iir_coeff[i]);
+
+#ifdef DEBUG_COEFF
+		regmap_update_bits(afe->regmap, AFE_GENERAL2_ASRC_2CH_CON13,
+				   G_SRC_COEFF_SRAM_ADR_MASK_SFT, 0);
+
+		for (i = 0; i < iir_coeff_num; i++) {
+			regmap_read(afe->regmap, AFE_GENERAL2_ASRC_2CH_CON12,
+				    &reg_val);
+			dev_info(afe->dev, "%s(), i = %d, coeff = 0x%x\n",
+				 __func__, i, reg_val);
+		}
+#endif
+		/* disable sram access */
+		regmap_update_bits(afe->regmap, AFE_GENERAL2_ASRC_2CH_CON0,
+				   G_SRC_COEFF_SRAM_CTRL_MASK_SFT, 0);
+		/* CHSET_IIR_STAGE */
+		iir_stage = (iir_coeff_num / 6) - 1;
+		regmap_update_bits(afe->regmap, AFE_GENERAL2_ASRC_2CH_CON2,
+				   G_SRC_CHSET_IIR_STAGE_MASK_SFT,
+				   iir_stage << G_SRC_CHSET_IIR_STAGE_SFT);
+		/* CHSET_IIR_EN */
+		regmap_update_bits(afe->regmap, AFE_GENERAL2_ASRC_2CH_CON2,
+				   G_SRC_CHSET_IIR_EN_MASK_SFT,
+				   BIT(G_SRC_CHSET_IIR_EN_SFT));
+	} else {
+		/* CHSET_IIR_EN off */
+		regmap_update_bits(afe->regmap, AFE_GENERAL2_ASRC_2CH_CON2,
+				   G_SRC_CHSET_IIR_EN_MASK_SFT, 0);
+	}
+
+	return 0;
+}
+
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