[PATCH 05/18] SoC: mediatek: mt8365: support audio clock control

Alexandre Mergnat
2024-02-26T14:03:22Z

Add audio clock wrapper and audio tuner control.

Signed-off-by: Alexandre Mergnat <amergnat@baylibre.com>
---
sound/soc/mediatek/mt8365/mt8365-afe-clk.c | 455 +++++++++++++++++++++++++++++
sound/soc/mediatek/mt8365/mt8365-afe-clk.h | 55 ++++
2 files changed, 510 insertions(+)

diff --git a/sound/soc/mediatek/mt8365/mt8365-afe-clk.c b/sound/soc/mediatek/mt8365/mt8365-afe-clk.c
new file mode 100644
index 000000000000..2df781a22bf0
--- /dev/null
+++ b/sound/soc/mediatek/mt8365/mt8365-afe-clk.c
@@ -0,0 +1,455 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Mediatek 8365 AFE clock control
+ *
+ * Copyright (c) 2024 MediaTek Inc.
+ * Authors: Jia Zeng <jia.zeng@mediatek.com>
+ * Alexandre Mergnat <amergnat@baylibre.com>
+ */
+
+#include "mt8365-afe-clk.h"
+#include "mt8365-afe-common.h"
+#include "mt8365-reg.h"
+#include "../common/mtk-base-afe.h"
+#include <linux/device.h>
+#include <linux/mfd/syscon.h>
+
+static const char *aud_clks[MT8365_CLK_NUM] = {
+ [MT8365_CLK_TOP_AUD_SEL] = "top_audio_sel",
+ [MT8365_CLK_AUD_I2S0_M] = "audio_i2s0_m",
+ [MT8365_CLK_AUD_I2S1_M] = "audio_i2s1_m",
+ [MT8365_CLK_AUD_I2S2_M] = "audio_i2s2_m",
+ [MT8365_CLK_AUD_I2S3_M] = "audio_i2s3_m",
+ [MT8365_CLK_ENGEN1] = "engen1",
+ [MT8365_CLK_ENGEN2] = "engen2",
+ [MT8365_CLK_AUD1] = "aud1",
+ [MT8365_CLK_AUD2] = "aud2",
+ [MT8365_CLK_I2S0_M_SEL] = "i2s0_m_sel",
+ [MT8365_CLK_I2S1_M_SEL] = "i2s1_m_sel",
+ [MT8365_CLK_I2S2_M_SEL] = "i2s2_m_sel",
+ [MT8365_CLK_I2S3_M_SEL] = "i2s3_m_sel",
+ [MT8365_CLK_CLK26M] = "top_clk26m_clk",
+};
+
+int mt8365_afe_init_audio_clk(struct mtk_base_afe *afe)
+{
+ size_t i;
+ struct mt8365_afe_private *afe_priv = afe->platform_priv;
+
+ for (i = 0; i < ARRAY_SIZE(aud_clks); i++) {
+ afe_priv->clocks[i] = devm_clk_get(afe->dev, aud_clks[i]);
+ if (IS_ERR(afe_priv->clocks[i])) {
+ dev_err(afe->dev, "%s devm_clk_get %s fail\n",
+ __func__, aud_clks[i]);
+ return PTR_ERR(afe_priv->clocks[i]);
+ }
+ }
+ return 0;
+
+ afe_priv->topckgen = syscon_regmap_lookup_by_phandle(afe->dev->of_node,
+ "mediatek,topckgen");
+ if (IS_ERR(afe_priv->topckgen)) {
+ dev_err(afe->dev, "%s() Cannot find topckgen controller: %ld\n",
+ __func__, PTR_ERR(afe_priv->topckgen));
+ return PTR_ERR(afe_priv->topckgen);
+ }
+}
+
+int mt8365_afe_enable_clk(struct mtk_base_afe *afe, struct clk *clk)
+{
+ int ret;
+
+ if (clk) {
+ ret = clk_prepare_enable(clk);
+ if (ret) {
+ dev_err(afe->dev, "Failed to enable clk\n");
+ return ret;
+ }
+ }
+ return 0;
+}
+
+void mt8365_afe_disable_clk(struct mtk_base_afe *afe, struct clk *clk)
+{
+ if (clk)
+ clk_disable_unprepare(clk);
+}
+
+int mt8365_afe_set_clk_rate(struct mtk_base_afe *afe, struct clk *clk,
+ unsigned int rate)
+{
+ int ret;
+
+ if (clk) {
+ ret = clk_set_rate(clk, rate);
+ if (ret) {
+ dev_err(afe->dev, "Failed to set rate\n");
+ return ret;
+ }
+ }
+ return 0;
+}
+
+int mt8365_afe_set_clk_parent(struct mtk_base_afe *afe, struct clk *clk,
+ struct clk *parent)
+{
+ int ret;
+
+ if (clk && parent) {
+ ret = clk_set_parent(clk, parent);
+ if (ret) {
+ dev_err(afe->dev, "Failed to set parent\n");
+ return ret;
+ }
+ }
+ return 0;
+}
+
+static unsigned int get_top_cg_reg(unsigned int cg_type)
+{
+ switch (cg_type) {
+ case MT8365_TOP_CG_AFE:
+ case MT8365_TOP_CG_I2S_IN:
+ case MT8365_TOP_CG_22M:
+ case MT8365_TOP_CG_24M:
+ case MT8365_TOP_CG_INTDIR_CK:
+ case MT8365_TOP_CG_APLL2_TUNER:
+ case MT8365_TOP_CG_APLL_TUNER:
+ case MT8365_TOP_CG_SPDIF:
+ case MT8365_TOP_CG_TDM_OUT:
+ case MT8365_TOP_CG_TDM_IN:
+ case MT8365_TOP_CG_ADC:
+ case MT8365_TOP_CG_DAC:
+ case MT8365_TOP_CG_DAC_PREDIS:
+ case MT8365_TOP_CG_TML:
+ return AUDIO_TOP_CON0;
+ case MT8365_TOP_CG_I2S1_BCLK:
+ case MT8365_TOP_CG_I2S2_BCLK:
+ case MT8365_TOP_CG_I2S3_BCLK:
+ case MT8365_TOP_CG_I2S4_BCLK:
+ case MT8365_TOP_CG_DMIC0_ADC:
+ case MT8365_TOP_CG_DMIC1_ADC:
+ case MT8365_TOP_CG_DMIC2_ADC:
+ case MT8365_TOP_CG_DMIC3_ADC:
+ case MT8365_TOP_CG_CONNSYS_I2S_ASRC:
+ case MT8365_TOP_CG_GENERAL1_ASRC:
+ case MT8365_TOP_CG_GENERAL2_ASRC:
+ case MT8365_TOP_CG_TDM_ASRC:
+ return AUDIO_TOP_CON1;
+ default:
+ return 0;
+ }
+}
+
+static unsigned int get_top_cg_mask(unsigned int cg_type)
+{
+ switch (cg_type) {
+ case MT8365_TOP_CG_AFE:
+ return AUD_TCON0_PDN_AFE;
+ case MT8365_TOP_CG_I2S_IN:
+ return AUD_TCON0_PDN_I2S_IN;
+ case MT8365_TOP_CG_22M:
+ return AUD_TCON0_PDN_22M;
+ case MT8365_TOP_CG_24M:
+ return AUD_TCON0_PDN_24M;
+ case MT8365_TOP_CG_INTDIR_CK:
+ return AUD_TCON0_PDN_INTDIR;
+ case MT8365_TOP_CG_APLL2_TUNER:
+ return AUD_TCON0_PDN_APLL2_TUNER;
+ case MT8365_TOP_CG_APLL_TUNER:
+ return AUD_TCON0_PDN_APLL_TUNER;
+ case MT8365_TOP_CG_SPDIF:
+ return AUD_TCON0_PDN_SPDIF;
+ case MT8365_TOP_CG_TDM_OUT:
+ return AUD_TCON0_PDN_TDM_OUT;
+ case MT8365_TOP_CG_TDM_IN:
+ return AUD_TCON0_PDN_TDM_IN;
+ case MT8365_TOP_CG_ADC:
+ return AUD_TCON0_PDN_ADC;
+ case MT8365_TOP_CG_DAC:
+ return AUD_TCON0_PDN_DAC;
+ case MT8365_TOP_CG_DAC_PREDIS:
+ return AUD_TCON0_PDN_DAC_PREDIS;
+ case MT8365_TOP_CG_TML:
+ return AUD_TCON0_PDN_TML;
+ case MT8365_TOP_CG_I2S1_BCLK:
+ return AUD_TCON1_PDN_I2S1_BCLK;
+ case MT8365_TOP_CG_I2S2_BCLK:
+ return AUD_TCON1_PDN_I2S2_BCLK;
+ case MT8365_TOP_CG_I2S3_BCLK:
+ return AUD_TCON1_PDN_I2S3_BCLK;
+ case MT8365_TOP_CG_I2S4_BCLK:
+ return AUD_TCON1_PDN_I2S4_BCLK;
+ case MT8365_TOP_CG_DMIC0_ADC:
+ return AUD_TCON1_PDN_DMIC0_ADC;
+ case MT8365_TOP_CG_DMIC1_ADC:
+ return AUD_TCON1_PDN_DMIC1_ADC;
+ case MT8365_TOP_CG_DMIC2_ADC:
+ return AUD_TCON1_PDN_DMIC2_ADC;
+ case MT8365_TOP_CG_DMIC3_ADC:
+ return AUD_TCON1_PDN_DMIC3_ADC;
+ case MT8365_TOP_CG_CONNSYS_I2S_ASRC:
+ return AUD_TCON1_PDN_CONNSYS_I2S_ASRC;
+ case MT8365_TOP_CG_GENERAL1_ASRC:
+ return AUD_TCON1_PDN_GENERAL1_ASRC;
+ case MT8365_TOP_CG_GENERAL2_ASRC:
+ return AUD_TCON1_PDN_GENERAL2_ASRC;
+ case MT8365_TOP_CG_TDM_ASRC:
+ return AUD_TCON1_PDN_TDM_ASRC;
+ default:
+ return 0;
+ }
+}
+
+static unsigned int get_top_cg_on_val(unsigned int cg_type)
+{
+ return 0;
+}
+
+static unsigned int get_top_cg_off_val(unsigned int cg_type)
+{
+ return get_top_cg_mask(cg_type);
+}
+
+int mt8365_afe_enable_top_cg(struct mtk_base_afe *afe, unsigned int cg_type)
+{
+ struct mt8365_afe_private *afe_priv = afe->platform_priv;
+ unsigned int reg = get_top_cg_reg(cg_type);
+ unsigned int mask = get_top_cg_mask(cg_type);
+ unsigned int val = get_top_cg_on_val(cg_type);
+ unsigned long flags;
+
+ spin_lock_irqsave(&afe_priv->afe_ctrl_lock, flags);
+
+ afe_priv->top_cg_ref_cnt[cg_type]++;
+ if (afe_priv->top_cg_ref_cnt[cg_type] == 1)
+ regmap_update_bits(afe->regmap, reg, mask, val);
+
+ spin_unlock_irqrestore(&afe_priv->afe_ctrl_lock, flags);
+
+ return 0;
+}
+
+int mt8365_afe_disable_top_cg(struct mtk_base_afe *afe, unsigned int cg_type)
+{
+ struct mt8365_afe_private *afe_priv = afe->platform_priv;
+ unsigned int reg = get_top_cg_reg(cg_type);
+ unsigned int mask = get_top_cg_mask(cg_type);
+ unsigned int val = get_top_cg_off_val(cg_type);
+ unsigned long flags;
+
+ spin_lock_irqsave(&afe_priv->afe_ctrl_lock, flags);
+
+ afe_priv->top_cg_ref_cnt[cg_type]--;
+ if (afe_priv->top_cg_ref_cnt[cg_type] == 0)
+ regmap_update_bits(afe->regmap, reg, mask, val);
+ else if (afe_priv->top_cg_ref_cnt[cg_type] < 0)
+ afe_priv->top_cg_ref_cnt[cg_type] = 0;
+
+ spin_unlock_irqrestore(&afe_priv->afe_ctrl_lock, flags);
+
+ return 0;
+}
+
+int mt8365_afe_enable_main_clk(struct mtk_base_afe *afe)
+{
+ struct mt8365_afe_private *afe_priv = afe->platform_priv;
+
+ mt8365_afe_enable_clk(afe, afe_priv->clocks[MT8365_CLK_TOP_AUD_SEL]);
+ mt8365_afe_enable_top_cg(afe, MT8365_TOP_CG_AFE);
+ mt8365_afe_enable_afe_on(afe);
+
+ return 0;
+}
+
+int mt8365_afe_disable_main_clk(struct mtk_base_afe *afe)
+{
+ struct mt8365_afe_private *afe_priv = afe->platform_priv;
+
+ mt8365_afe_disable_afe_on(afe);
+ mt8365_afe_disable_top_cg(afe, MT8365_TOP_CG_AFE);
+ mt8365_afe_disable_clk(afe, afe_priv->clocks[MT8365_CLK_TOP_AUD_SEL]);
+
+ return 0;
+}
+
+int mt8365_afe_emi_clk_on(struct mtk_base_afe *afe)
+{
+ return 0;
+}
+
+int mt8365_afe_emi_clk_off(struct mtk_base_afe *afe)
+{
+ return 0;
+}
+
+int mt8365_afe_enable_afe_on(struct mtk_base_afe *afe)
+{
+ struct mt8365_afe_private *afe_priv = afe->platform_priv;
+ unsigned long flags;
+
+ spin_lock_irqsave(&afe_priv->afe_ctrl_lock, flags);
+
+ afe_priv->afe_on_ref_cnt++;
+ if (afe_priv->afe_on_ref_cnt == 1)
+ regmap_update_bits(afe->regmap, AFE_DAC_CON0, 0x1, 0x1);
+
+ spin_unlock_irqrestore(&afe_priv->afe_ctrl_lock, flags);
+
+ return 0;
+}
+
+int mt8365_afe_disable_afe_on(struct mtk_base_afe *afe)
+{
+ struct mt8365_afe_private *afe_priv = afe->platform_priv;
+ unsigned long flags;
+
+ spin_lock_irqsave(&afe_priv->afe_ctrl_lock, flags);
+
+ afe_priv->afe_on_ref_cnt--;
+ if (afe_priv->afe_on_ref_cnt == 0)
+ regmap_update_bits(afe->regmap, AFE_DAC_CON0, 0x1, 0x0);
+ else if (afe_priv->afe_on_ref_cnt < 0)
+ afe_priv->afe_on_ref_cnt = 0;
+
+ spin_unlock_irqrestore(&afe_priv->afe_ctrl_lock, flags);
+
+ return 0;
+}
+
+int mt8365_afe_hd_engen_enable(struct mtk_base_afe *afe, bool apll1)
+{
+ if (apll1)
+ regmap_update_bits(afe->regmap, AFE_HD_ENGEN_ENABLE,
+ AFE_22M_PLL_EN, AFE_22M_PLL_EN);
+ else
+ regmap_update_bits(afe->regmap, AFE_HD_ENGEN_ENABLE,
+ AFE_24M_PLL_EN, AFE_24M_PLL_EN);
+
+ return 0;
+}
+
+int mt8365_afe_hd_engen_disable(struct mtk_base_afe *afe, bool apll1)
+{
+ if (apll1)
+ regmap_update_bits(afe->regmap, AFE_HD_ENGEN_ENABLE,
+ AFE_22M_PLL_EN, ~AFE_22M_PLL_EN);
+ else
+ regmap_update_bits(afe->regmap, AFE_HD_ENGEN_ENABLE,
+ AFE_24M_PLL_EN, ~AFE_24M_PLL_EN);
+
+ return 0;
+}
+
+int mt8365_afe_enable_apll_tuner_cfg(struct mtk_base_afe *afe,
+ unsigned int apll)
+{
+ struct mt8365_afe_private *afe_priv = afe->platform_priv;
+
+ mutex_lock(&afe_priv->afe_clk_mutex);
+
+ afe_priv->apll_tuner_ref_cnt[apll]++;
+ if (afe_priv->apll_tuner_ref_cnt[apll] != 1) {
+ mutex_unlock(&afe_priv->afe_clk_mutex);
+ return 0;
+ }
+
+ if (apll == MT8365_AFE_APLL1) {
+ regmap_update_bits(afe->regmap, AFE_APLL_TUNER_CFG,
+ AFE_APLL_TUNER_CFG_MASK, 0x432);
+ regmap_update_bits(afe->regmap, AFE_APLL_TUNER_CFG,
+ AFE_APLL_TUNER_CFG_EN_MASK, 0x1);
+ } else {
+ regmap_update_bits(afe->regmap, AFE_APLL_TUNER_CFG1,
+ AFE_APLL_TUNER_CFG1_MASK, 0x434);
+ regmap_update_bits(afe->regmap, AFE_APLL_TUNER_CFG1,
+ AFE_APLL_TUNER_CFG1_EN_MASK, 0x1);
+ }
+
+ mutex_unlock(&afe_priv->afe_clk_mutex);
+ return 0;
+}
+
+int mt8365_afe_disable_apll_tuner_cfg(struct mtk_base_afe *afe,
+ unsigned int apll)
+{
+ struct mt8365_afe_private *afe_priv = afe->platform_priv;
+
+ mutex_lock(&afe_priv->afe_clk_mutex);
+
+ afe_priv->apll_tuner_ref_cnt[apll]--;
+ if (afe_priv->apll_tuner_ref_cnt[apll] == 0) {
+ if (apll == MT8365_AFE_APLL1)
+ regmap_update_bits(afe->regmap, AFE_APLL_TUNER_CFG,
+ AFE_APLL_TUNER_CFG_EN_MASK, 0x0);
+ else
+ regmap_update_bits(afe->regmap, AFE_APLL_TUNER_CFG1,
+ AFE_APLL_TUNER_CFG1_EN_MASK, 0x0);
+
+ } else if (afe_priv->apll_tuner_ref_cnt[apll] < 0) {
+ afe_priv->apll_tuner_ref_cnt[apll] = 0;
+ }
+
+ mutex_unlock(&afe_priv->afe_clk_mutex);
+ return 0;
+}
+
+int mt8365_afe_enable_apll_associated_cfg(struct mtk_base_afe *afe,
+ unsigned int apll)
+{
+ struct mt8365_afe_private *afe_priv = afe->platform_priv;
+
+ if (apll == MT8365_AFE_APLL1) {
+ if (clk_prepare_enable(afe_priv->clocks[MT8365_CLK_ENGEN1])) {
+ dev_info(afe->dev, "%s Failed to enable ENGEN1 clk\n",
+ __func__);
+ return 0;
+ }
+ mt8365_afe_enable_top_cg(afe, MT8365_TOP_CG_22M);
+ mt8365_afe_hd_engen_enable(afe, true);
+#ifdef ENABLE_AFE_APLL_TUNER
+ mt8365_afe_enable_top_cg(afe, MT8365_TOP_CG_APLL_TUNER);
+ mt8365_afe_enable_apll_tuner_cfg(afe, MT8365_AFE_APLL1);
+#endif
+ } else {
+ if (clk_prepare_enable(afe_priv->clocks[MT8365_CLK_ENGEN2])) {
+ dev_info(afe->dev, "%s Failed to enable ENGEN2 clk\n",
+ __func__);
+ return 0;
+ }
+ mt8365_afe_enable_top_cg(afe, MT8365_TOP_CG_24M);
+ mt8365_afe_hd_engen_enable(afe, false);
+#ifdef ENABLE_AFE_APLL_TUNER
+ mt8365_afe_enable_top_cg(afe, MT8365_TOP_CG_APLL2_TUNER);
+ mt8365_afe_enable_apll_tuner_cfg(afe, MT8365_AFE_APLL2);
+#endif
+ }
+
+ return 0;
+}
+
+int mt8365_afe_disable_apll_associated_cfg(struct mtk_base_afe *afe,
+ unsigned int apll)
+{
+ struct mt8365_afe_private *afe_priv = afe->platform_priv;
+
+ if (apll == MT8365_AFE_APLL1) {
+#ifdef ENABLE_AFE_APLL_TUNER
+ mt8365_afe_disable_apll_tuner_cfg(afe, MT8365_AFE_APLL1);
+ mt8365_afe_disable_top_cg(afe, MT8365_TOP_CG_APLL_TUNER);
+#endif
+ mt8365_afe_hd_engen_disable(afe, true);
+ mt8365_afe_disable_top_cg(afe, MT8365_TOP_CG_22M);
+ clk_disable_unprepare(afe_priv->clocks[MT8365_CLK_ENGEN1]);
+ } else {
+#ifdef ENABLE_AFE_APLL_TUNER
+ mt8365_afe_disable_apll_tuner_cfg(afe, MT8365_AFE_APLL2);
+ mt8365_afe_disable_top_cg(afe, MT8365_TOP_CG_APLL2_TUNER);
+#endif
+ mt8365_afe_hd_engen_disable(afe, false);
+ mt8365_afe_disable_top_cg(afe, MT8365_TOP_CG_24M);
+ clk_disable_unprepare(afe_priv->clocks[MT8365_CLK_ENGEN2]);
+ }
+
+ return 0;
+}
diff --git a/sound/soc/mediatek/mt8365/mt8365-afe-clk.h b/sound/soc/mediatek/mt8365/mt8365-afe-clk.h
new file mode 100644
index 000000000000..89377464c2b5
--- /dev/null
+++ b/sound/soc/mediatek/mt8365/mt8365-afe-clk.h
@@ -0,0 +1,55 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Mediatek 8365 AFE clock control definitions
+ *
+ * Copyright (c) 2024 MediaTek Inc.
+ * Authors: Jia Zeng <jia.zeng@mediatek.com>
+ * Alexandre Mergnat <amergnat@baylibre.com>
+ */
+
+#ifndef _MT8365_AFE_UTILS_H_
+#define _MT8365_AFE_UTILS_H_
+
+struct mtk_base_afe;
+struct clk;
+
+int mt8365_afe_init_audio_clk(struct mtk_base_afe *afe);
+
+int mt8365_afe_enable_clk(struct mtk_base_afe *afe, struct clk *clk);
+
+void mt8365_afe_disable_clk(struct mtk_base_afe *afe, struct clk *clk);
+
+int mt8365_afe_set_clk_rate(struct mtk_base_afe *afe, struct clk *clk,
+ unsigned int rate);
+
+int mt8365_afe_set_clk_parent(struct mtk_base_afe *afe, struct clk *clk,
+ struct clk *parent);
+
+int mt8365_afe_enable_top_cg(struct mtk_base_afe *afe, unsigned int cg_type);
+
+int mt8365_afe_disable_top_cg(struct mtk_base_afe *afe, unsigned int cg_type);
+
+int mt8365_afe_enable_main_clk(struct mtk_base_afe *afe);
+
+int mt8365_afe_disable_main_clk(struct mtk_base_afe *afe);
+
+int mt8365_afe_emi_clk_on(struct mtk_base_afe *afe);
+
+int mt8365_afe_emi_clk_off(struct mtk_base_afe *afe);
+
+int mt8365_afe_enable_afe_on(struct mtk_base_afe *afe);
+
+int mt8365_afe_disable_afe_on(struct mtk_base_afe *afe);
+
+int mt8365_afe_enable_apll_tuner_cfg(struct mtk_base_afe *afe,
+ unsigned int apll);
+
+int mt8365_afe_disable_apll_tuner_cfg(struct mtk_base_afe *afe,
+ unsigned int apll);
+
+int mt8365_afe_enable_apll_associated_cfg(struct mtk_base_afe *afe,
+ unsigned int apll);
+
+int mt8365_afe_disable_apll_associated_cfg(struct mtk_base_afe *afe,
+ unsigned int apll);
+#endif

--
2.25.1