ASoC: codecs: Add power domains support in digital macro codecs

Add support for enabling required power domains in digital macro codecs.
macro and dcodec power domains are being requested as clocks by HLOS
in ADSP based architectures and ADSP internally handling as powerdomains.
In ADSP bypass case need to handle them as power domains explicitly.

Signed-off-by: Srinivasa Rao Mandadapu <quic_srivasam@quicinc.com>
Co-developed-by: Venkata Prasad Potturu <quic_potturu@quicinc.com>
Signed-off-by: Venkata Prasad Potturu <quic_potturu@quicinc.com>
Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/r/1645898959-11231-2-git-send-email-quic_srivasam@quicinc.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/Kconfig

@@ -244,6 +244,7 @@ config SND_SOC_ALL_CODECS
 	imply SND_SOC_WCD9335
 	imply SND_SOC_WCD934X
 	imply SND_SOC_WCD938X_SDW
+	imply SND_SOC_LPASS_MACRO_COMMON
 	imply SND_SOC_LPASS_RX_MACRO
 	imply SND_SOC_LPASS_TX_MACRO
 	imply SND_SOC_WL1273
@@ -2008,6 +2009,9 @@ config SND_SOC_TPA6130A2
 	tristate "Texas Instruments TPA6130A2 headphone amplifier"
 	depends on I2C
 
+config SND_SOC_LPASS_MACRO_COMMON
+        tristate
+
 config SND_SOC_LPASS_WSA_MACRO
 	depends on COMMON_CLK
 	select REGMAP_MMIO
@@ -2016,16 +2020,19 @@ config SND_SOC_LPASS_WSA_MACRO
 config SND_SOC_LPASS_VA_MACRO
 	depends on COMMON_CLK
 	select REGMAP_MMIO
+	select SND_SOC_LPASS_MACRO_COMMON
 	tristate "Qualcomm VA Macro in LPASS(Low Power Audio SubSystem)"
 
 config SND_SOC_LPASS_RX_MACRO
 	depends on COMMON_CLK
 	select REGMAP_MMIO
+	select SND_SOC_LPASS_MACRO_COMMON
 	tristate "Qualcomm RX Macro in LPASS(Low Power Audio SubSystem)"
 
 config SND_SOC_LPASS_TX_MACRO
 	depends on COMMON_CLK
 	select REGMAP_MMIO
+	select SND_SOC_LPASS_MACRO_COMMON
 	tristate "Qualcomm TX Macro in LPASS(Low Power Audio SubSystem)"
 
 endmenu

sound/soc/codecs/Makefile

@@ -112,6 +112,7 @@ snd-soc-l3-objs := l3.o
 snd-soc-lm4857-objs := lm4857.o
 snd-soc-lm49453-objs := lm49453.o
 snd-soc-lochnagar-sc-objs := lochnagar-sc.o
+snd-soc-lpass-macro-common-objs := lpass-macro-common.o
 snd-soc-lpass-rx-macro-objs := lpass-rx-macro.o
 snd-soc-lpass-tx-macro-objs := lpass-tx-macro.o
 snd-soc-lpass-wsa-macro-objs := lpass-wsa-macro.o
@@ -676,6 +677,7 @@ obj-$(CONFIG_SND_SOC_MAX9877)	+= snd-soc-max9877.o
 obj-$(CONFIG_SND_SOC_MAX98504)	+= snd-soc-max98504.o
 obj-$(CONFIG_SND_SOC_SIMPLE_AMPLIFIER)	+= snd-soc-simple-amplifier.o
 obj-$(CONFIG_SND_SOC_TPA6130A2)	+= snd-soc-tpa6130a2.o
+obj-$(CONFIG_SND_SOC_LPASS_MACRO_COMMON)	+= snd-soc-lpass-macro-common.o
 obj-$(CONFIG_SND_SOC_LPASS_WSA_MACRO)	+= snd-soc-lpass-wsa-macro.o
 obj-$(CONFIG_SND_SOC_LPASS_VA_MACRO)	+= snd-soc-lpass-va-macro.o
 obj-$(CONFIG_SND_SOC_LPASS_RX_MACRO)	+= snd-soc-lpass-rx-macro.o

sound/soc/codecs/lpass-macro-common.c

@@ -0,0 +1,67 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// Copyright (c) 2022, The Linux Foundation. All rights reserved.
+
+#include <linux/export.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/pm_domain.h>
+#include <linux/pm_runtime.h>
+
+#include "lpass-macro-common.h"
+
+struct lpass_macro *lpass_macro_pds_init(struct device *dev)
+{
+	struct lpass_macro *l_pds;
+	int ret;
+
+	if (!of_find_property(dev->of_node, "power-domains", NULL))
+		return NULL;
+
+	l_pds = devm_kzalloc(dev, sizeof(*l_pds), GFP_KERNEL);
+	if (!l_pds)
+		return ERR_PTR(-ENOMEM);
+
+	l_pds->macro_pd = dev_pm_domain_attach_by_name(dev, "macro");
+	if (IS_ERR_OR_NULL(l_pds->macro_pd))
+		return NULL;
+
+	ret = pm_runtime_get_sync(l_pds->macro_pd);
+	if (ret < 0) {
+		pm_runtime_put_noidle(l_pds->macro_pd);
+		goto macro_err;
+	}
+
+	l_pds->dcodec_pd = dev_pm_domain_attach_by_name(dev, "dcodec");
+	if (IS_ERR_OR_NULL(l_pds->dcodec_pd))
+		goto dcodec_err;
+
+	ret = pm_runtime_get_sync(l_pds->dcodec_pd);
+	if (ret < 0) {
+		pm_runtime_put_noidle(l_pds->dcodec_pd);
+		goto dcodec_sync_err;
+	}
+	return l_pds;
+
+dcodec_sync_err:
+	dev_pm_domain_detach(l_pds->dcodec_pd, false);
+dcodec_err:
+	pm_runtime_put(l_pds->macro_pd);
+macro_err:
+	dev_pm_domain_detach(l_pds->macro_pd, false);
+	return ERR_PTR(ret);
+}
+EXPORT_SYMBOL_GPL(lpass_macro_pds_init);
+
+void lpass_macro_pds_exit(struct lpass_macro *pds)
+{
+	pm_runtime_put(pds->macro_pd);
+	dev_pm_domain_detach(pds->macro_pd, false);
+	pm_runtime_put(pds->dcodec_pd);
+	dev_pm_domain_detach(pds->dcodec_pd, false);
+}
+EXPORT_SYMBOL_GPL(lpass_macro_pds_exit);
+
+MODULE_DESCRIPTION("Common macro driver");
+MODULE_LICENSE("GPL");

sound/soc/codecs/lpass-macro-common.h

@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2022, The Linux Foundation. All rights reserved.
+ */
+
+#ifndef __LPASS_MACRO_COMMON_H__
+#define __LPASS_MACRO_COMMON_H__
+
+struct lpass_macro {
+	struct device *macro_pd;
+	struct device *dcodec_pd;
+};
+
+struct lpass_macro *lpass_macro_pds_init(struct device *dev);
+void lpass_macro_pds_exit(struct lpass_macro *pds);
+
+#endif /* __LPASS_MACRO_COMMON_H__ */

sound/soc/codecs/lpass-rx-macro.c

@@ -15,6 +15,8 @@
 #include <linux/of_clk.h>
 #include <linux/clk-provider.h>
 
+#include "lpass-macro-common.h"
+
 #define CDC_RX_TOP_TOP_CFG0		(0x0000)
 #define CDC_RX_TOP_SWR_CTRL		(0x0008)
 #define CDC_RX_TOP_DEBUG		(0x000C)
@@ -607,7 +609,7 @@ struct rx_macro {
 	int is_softclip_on;
 	int is_aux_hpf_on;
 	int softclip_clk_users;
-
+	struct lpass_macro *pds;
 	struct regmap *regmap;
 	struct clk *mclk;
 	struct clk *npl;
@@ -3555,6 +3557,10 @@ static int rx_macro_probe(struct platform_device *pdev)
 	if (IS_ERR(rx->fsgen))
 		return PTR_ERR(rx->fsgen);
 
+	rx->pds = lpass_macro_pds_init(dev);
+	if (IS_ERR(rx->pds))
+		return PTR_ERR(rx->pds);
+
 	base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(base))
 		return PTR_ERR(base);
@@ -3635,6 +3641,8 @@ static int rx_macro_remove(struct platform_device *pdev)
 	clk_disable_unprepare(rx->macro);
 	clk_disable_unprepare(rx->dcodec);
 
+	lpass_macro_pds_exit(rx->pds);
+
 	return 0;
 }
 

sound/soc/codecs/lpass-tx-macro.c

@@ -14,6 +14,8 @@
 #include <linux/of_clk.h>
 #include <linux/clk-provider.h>
 
+#include "lpass-macro-common.h"
+
 #define CDC_TX_CLK_RST_CTRL_MCLK_CONTROL (0x0000)
 #define CDC_TX_MCLK_EN_MASK		BIT(0)
 #define CDC_TX_MCLK_ENABLE		BIT(0)
@@ -271,6 +273,7 @@ struct tx_macro {
 	u16 dmic_clk_div;
 	bool bcs_enable;
 	int dec_mode[NUM_DECIMATORS];
+	struct lpass_macro *pds;
 	bool bcs_clk_en;
 };
 #define to_tx_macro(_hw) container_of(_hw, struct tx_macro, hw)
@@ -1820,6 +1823,10 @@ static int tx_macro_probe(struct platform_device *pdev)
 	if (IS_ERR(tx->fsgen))
 		return PTR_ERR(tx->fsgen);
 
+	tx->pds = lpass_macro_pds_init(dev);
+	if (IS_ERR(tx->pds))
+		return PTR_ERR(tx->pds);
+
 	base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(base))
 		return PTR_ERR(base);
@@ -1957,6 +1964,8 @@ static int __maybe_unused tx_macro_runtime_resume(struct device *dev)
 	regcache_sync(tx->regmap);
 	tx->reset_swr = true;
 
+	lpass_macro_pds_exit(tx->pds);
+
 	return 0;
 err_fsgen:
 	clk_disable_unprepare(tx->npl);

sound/soc/codecs/lpass-va-macro.c

@@ -16,6 +16,8 @@
 #include <sound/soc-dapm.h>
 #include <sound/tlv.h>
 
+#include "lpass-macro-common.h"
+
 /* VA macro registers */
 #define CDC_VA_CLK_RST_CTRL_MCLK_CONTROL	(0x0000)
 #define CDC_VA_MCLK_CONTROL_EN			BIT(0)
@@ -198,6 +200,7 @@ struct va_macro {
 	struct clk *macro;
 	struct clk *dcodec;
 	struct clk_hw hw;
+	struct lpass_macro *pds;
 
 	s32 dmic_0_1_clk_cnt;
 	s32 dmic_2_3_clk_cnt;
@@ -1420,6 +1423,10 @@ static int va_macro_probe(struct platform_device *pdev)
 	if (IS_ERR(va->mclk))
 		return PTR_ERR(va->mclk);
 
+	va->pds = lpass_macro_pds_init(dev);
+	if (IS_ERR(va->pds))
+		return PTR_ERR(va->pds);
+
 	ret = of_property_read_u32(dev->of_node, "qcom,dmic-sample-rate",
 				   &sample_rate);
 	if (ret) {
@@ -1524,6 +1531,9 @@ static int __maybe_unused va_macro_runtime_resume(struct device *dev)
 
 	regcache_cache_only(va->regmap, false);
 	regcache_sync(va->regmap);
+
+	lpass_macro_pds_exit(va->pds);
+
 	return 0;
 }
 

sound/soc/qcom/Kconfig

@@ -194,6 +194,7 @@ config SND_SOC_SC7280
 	select SND_SOC_LPASS_SC7280
 	select SND_SOC_MAX98357A
 	select SND_SOC_WCD938X
+	select SND_SOC_LPASS_MACRO_COMMON
 	select SND_SOC_LPASS_RX_MACRO
 	select SND_SOC_LPASS_TX_MACRO
 	help