Re: [PATCH v4 07/16] ASoC: mediatek: mt8365: Add ADDA DAI support

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Il 26/04/24 19:22, Alexandre Mergnat ha scritto:
Add ADDA Device Audio Interface support for MT8365 SoC.

Signed-off-by: Alexandre Mergnat <amergnat@xxxxxxxxxxxx>
---
  sound/soc/mediatek/mt8365/mt8365-dai-adda.c | 315 ++++++++++++++++++++++++++++
  1 file changed, 315 insertions(+)

diff --git a/sound/soc/mediatek/mt8365/mt8365-dai-adda.c b/sound/soc/mediatek/mt8365/mt8365-dai-adda.c
new file mode 100644
index 000000000000..65d45010ac90
--- /dev/null
+++ b/sound/soc/mediatek/mt8365/mt8365-dai-adda.c
@@ -0,0 +1,315 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Mediatek 8365 ALSA SoC Audio DAI ADDA Control
+ *
+ * Copyright (c) 2024 MediaTek Inc.
+ * Authors: Jia Zeng <jia.zeng@xxxxxxxxxxxx>
+ *          Alexandre Mergnat <amergnat@xxxxxxxxxxxx>
+ */
+
+#include <linux/bitops.h>
+#include <linux/regmap.h>
+#include <sound/pcm_params.h>
+#include "mt8365-afe-clk.h"
+#include "mt8365-afe-common.h"
+#include "../common/mtk-dai-adda-common.h"
+
+static int adda_afe_on_ref_cnt;
+
+/* DAI Drivers */
+
+static int mt8365_dai_set_adda_out(struct mtk_base_afe *afe, unsigned int rate)
+{
+	unsigned int val;
+

if (rate == 8000 || rate == 16000)
	val = AFE_ADDA_DL_VOICE_DATA;
else
	val = 0;

+	switch (rate) {
+	case 8000:
+		val = AFE_ADDA_DL_VOICE_DATA;
+		break;
+	case 16000:
+		val = AFE_ADDA_DL_VOICE_DATA;
+		break;
+	default:
+		val = 0;
+	}
+
+	val |= FIELD_PREP(AFE_ADDA_DL_SAMPLING_RATE,
+		mtk_adda_dl_rate_transform(afe, rate));
+	val |= AFE_ADDA_DL_8X_UPSAMPLE |
+	       AFE_ADDA_DL_MUTE_OFF_CH1 |
+	       AFE_ADDA_DL_MUTE_OFF_CH2 |
+	       AFE_ADDA_DL_DEGRADE_GAIN;
+
+	regmap_update_bits(afe->regmap, AFE_ADDA_PREDIS_CON0, 0xffffffff, 0);
+	regmap_update_bits(afe->regmap, AFE_ADDA_PREDIS_CON1, 0xffffffff, 0);
+	regmap_update_bits(afe->regmap, AFE_ADDA_DL_SRC2_CON0, 0xffffffff, val);
+	/* SA suggest apply -0.3db to audio/speech path */
+	regmap_update_bits(afe->regmap, AFE_ADDA_DL_SRC2_CON1,
+			   0xffffffff, 0xf74f0000);
+	/* SA suggest use default value for sdm */
+	regmap_update_bits(afe->regmap, AFE_ADDA_DL_SDM_DCCOMP_CON,
+			   0xffffffff, 0x0700701e);
+
+	return 0;
+}
+
+static int mt8365_dai_set_adda_in(struct mtk_base_afe *afe, unsigned int rate)
+{
+	unsigned int val;
+
+	val = FIELD_PREP(AFE_ADDA_UL_SAMPLING_RATE,
+			 mtk_adda_ul_rate_transform(afe, rate));
+	regmap_update_bits(afe->regmap, AFE_ADDA_UL_SRC_CON0,
+			   AFE_ADDA_UL_SAMPLING_RATE, val);
+	/* Using Internal ADC */
+	regmap_update_bits(afe->regmap, AFE_ADDA_TOP_CON0, 0x1, 0x0);
+
+	return 0;
+}
+
+int mt8365_dai_enable_adda_on(struct mtk_base_afe *afe)
+{
+	unsigned long flags;
+	struct mt8365_afe_private *afe_priv = afe->platform_priv;
+
+	spin_lock_irqsave(&afe_priv->afe_ctrl_lock, flags);
+
+	adda_afe_on_ref_cnt++;
+	if (adda_afe_on_ref_cnt == 1)
+		regmap_update_bits(afe->regmap, AFE_ADDA_UL_DL_CON0,
+				   AFE_ADDA_UL_DL_ADDA_AFE_ON,
+				   AFE_ADDA_UL_DL_ADDA_AFE_ON);
+
+	spin_unlock_irqrestore(&afe_priv->afe_ctrl_lock, flags);
+
+	return 0;
+}
+
+int mt8365_dai_disable_adda_on(struct mtk_base_afe *afe)
+{
+	unsigned long flags;
+	struct mt8365_afe_private *afe_priv = afe->platform_priv;
+
+	spin_lock_irqsave(&afe_priv->afe_ctrl_lock, flags);
+
+	adda_afe_on_ref_cnt--;
+	if (adda_afe_on_ref_cnt == 0)
+		regmap_update_bits(afe->regmap, AFE_ADDA_UL_DL_CON0,
+				   AFE_ADDA_UL_DL_ADDA_AFE_ON,
+				   ~AFE_ADDA_UL_DL_ADDA_AFE_ON);
+	else if (adda_afe_on_ref_cnt < 0)
+		adda_afe_on_ref_cnt = 0;

Should we dev_warn() here? The refcount should never be less than zero - if it is,
then there's some issue somewhere that must be solved.

+
+	spin_unlock_irqrestore(&afe_priv->afe_ctrl_lock, flags);
+
+	return 0;
+}
+

Cheers,
Angelo




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