[PATCH v2 0/4] Add support for Loongson-1 AC97

[PATCH v2 0/4] Add support for Loongson-1 AC97

[Keguang Zhang via B4 Relay]

Add the driver and dt-binding document for Loongson-1 AC97.
Add the dt-binding document for Realtek ALC203 Codec.
Add DT support for the AC97 generic codec driver.

Signed-off-by: Keguang Zhang <keguang.zhang@gmail.com>
---
Changes in v2:
- Added a reference to dai-common.yaml in realtek,alc203.yaml.
- Return -EINVAL when 'audio-tx' or 'audio-rx' is absent from reg-names.
- Link to v1: https://lore.kernel.org/r/20250115-loongson1-ac97-v1-0-2087b04dcd7f@gmail.com

---
Keguang Zhang (4):
      ASoC: dt-bindings: Add Loongson-1 AC97 Controller
      ASoC: dt-bindings: Add Realtek ALC203 Codec
      ASoC: loongson: Add Loongson-1 AC97 Driver
      ASoC: ac97: Add DT support

 .../bindings/sound/loongson,ls1b-ac97.yaml         |  68 ++++
 .../devicetree/bindings/sound/realtek,alc203.yaml  |  36 ++
 MAINTAINERS                                        |   1 +
 sound/soc/codecs/ac97.c                            |  10 +
 sound/soc/loongson/Kconfig                         |  10 +
 sound/soc/loongson/Makefile                        |   2 +
 sound/soc/loongson/loongson1_ac97.c                | 398 +++++++++++++++++++++
 7 files changed, 525 insertions(+)
---
base-commit: 46086739de22d72319e37c37a134d32db52e1c5c
change-id: 20250115-loongson1-ac97-389daeec55e3

Best regards,
-- 
Keguang Zhang <keguang.zhang@gmail.com>

[PATCH v2 1/4] ASoC: dt-bindings: Add Loongson-1 AC97 Controller

[Keguang Zhang via B4 Relay]

From: Keguang Zhang <keguang.zhang@gmail.com>

Add devicetree binding document for Loongson-1 AC97 controller.

Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Keguang Zhang <keguang.zhang@gmail.com>
---
 .../bindings/sound/loongson,ls1b-ac97.yaml         | 68 ++++++++++++++++++++++
 1 file changed, 68 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/loongson,ls1b-ac97.yaml b/Documentation/devicetree/bindings/sound/loongson,ls1b-ac97.yaml
new file mode 100644
index 000000000000..1c6a2771f942
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/loongson,ls1b-ac97.yaml
@@ -0,0 +1,68 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/loongson,ls1b-ac97.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Loongson-1 AC97 Controller
+
+maintainers:
+  - Keguang Zhang <keguang.zhang@gmail.com>
+
+description:
+  The Loongson-1 AC97 controller supports 2-channel stereo output and input.
+  It is paired with the DMA engine to handle playback and capture functions.
+
+allOf:
+  - $ref: dai-common.yaml#
+
+properties:
+  compatible:
+    oneOf:
+      - const: loongson,ls1b-ac97
+      - items:
+          - enum:
+              - loongson,ls1a-ac97
+              - loongson,ls1c-ac97
+          - const: loongson,ls1b-ac97
+
+  reg:
+    maxItems: 3
+
+  reg-names:
+    items:
+      - const: ac97
+      - const: audio-tx
+      - const: audio-rx
+
+  dmas:
+    maxItems: 2
+
+  dma-names:
+    items:
+      - const: tx
+      - const: rx
+
+  '#sound-dai-cells':
+    const: 0
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - dmas
+  - dma-names
+  - '#sound-dai-cells'
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    audio-controller@1fe74000 {
+        compatible = "loongson,ls1b-ac97";
+        reg = <0x1fe74000 0x60>, <0x1fe72420 0x4>, <0x1fe74c4c 0x4>;
+        reg-names = "ac97", "audio-tx", "audio-rx";
+        dmas = <&dma 1>, <&dma 2>;
+        dma-names = "tx", "rx";
+        #sound-dai-cells = <0>;
+    };

-- 
2.43.0

[PATCH v2 2/4] ASoC: dt-bindings: Add Realtek ALC203 Codec

[Keguang Zhang via B4 Relay]

From: Keguang Zhang <keguang.zhang@gmail.com>

Add devicetree binding document for Realtek ALC203 codec.

Signed-off-by: Keguang Zhang <keguang.zhang@gmail.com>
---
 .../devicetree/bindings/sound/realtek,alc203.yaml  | 36 ++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/realtek,alc203.yaml b/Documentation/devicetree/bindings/sound/realtek,alc203.yaml
new file mode 100644
index 000000000000..6b90788b45eb
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/realtek,alc203.yaml
@@ -0,0 +1,36 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/realtek,alc203.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Realtek ALC203 AC97 Audio Codec
+
+maintainers:
+  - Keguang Zhang <keguang.zhang@gmail.com>
+
+description:
+  ALC203 is a full duplex AC97 2.3 compatible stereo audio codec.
+
+allOf:
+  - $ref: dai-common.yaml#
+
+properties:
+  compatible:
+    const: realtek,alc203
+
+  '#sound-dai-cells':
+    const: 0
+
+required:
+  - compatible
+  - '#sound-dai-cells'
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    audio-codec {
+        compatible = "realtek,alc203";
+        #sound-dai-cells = <0>;
+    };

-- 
2.43.0

[PATCH v2 3/4] ASoC: loongson: Add Loongson-1 AC97 Driver

[Keguang Zhang via B4 Relay]

From: Keguang Zhang <keguang.zhang@gmail.com>

Add AC97 driver for Loongson-1 SoCs.

Signed-off-by: Keguang Zhang <keguang.zhang@gmail.com>
---
 MAINTAINERS                         |   1 +
 sound/soc/loongson/Kconfig          |  10 +
 sound/soc/loongson/Makefile         |   2 +
 sound/soc/loongson/loongson1_ac97.c | 398 ++++++++++++++++++++++++++++++++++++
 4 files changed, 411 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 6b4103444d7e..7d218de94529 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -16244,6 +16244,7 @@ F:	arch/mips/include/asm/mach-loongson32/
 F:	arch/mips/loongson32/
 F:	drivers/*/*loongson1*
 F:	drivers/net/ethernet/stmicro/stmmac/dwmac-loongson1.c
+F:	sound/soc/loongson/loongson1_ac97.c
 
 MIPS/LOONGSON2EF ARCHITECTURE
 M:	Jiaxun Yang <jiaxun.yang@flygoat.com>
diff --git a/sound/soc/loongson/Kconfig b/sound/soc/loongson/Kconfig
index 2d8291c1443c..1a3c28816e7a 100644
--- a/sound/soc/loongson/Kconfig
+++ b/sound/soc/loongson/Kconfig
@@ -37,3 +37,13 @@ config SND_SOC_LOONGSON_I2S_PLATFORM
 	  The controller work as a platform device, we can found it in
 	  Loongson-2K1000 SoCs.
 endmenu
+
+config SND_LOONGSON1_AC97
+	tristate "Loongson1 AC97 Support"
+	depends on LOONGSON1_APB_DMA
+	select SND_SOC_AC97_CODEC
+	select SND_SOC_GENERIC_DMAENGINE_PCM
+	select REGMAP_MMIO
+	help
+	  Say Y or M if you want to add support for codecs attached to
+	  the Loongson1 AC97 controller.
diff --git a/sound/soc/loongson/Makefile b/sound/soc/loongson/Makefile
index c0cb1acb36e3..4c6d3130bcee 100644
--- a/sound/soc/loongson/Makefile
+++ b/sound/soc/loongson/Makefile
@@ -8,6 +8,8 @@ obj-$(CONFIG_SND_SOC_LOONGSON_I2S_PLATFORM) += snd-soc-loongson-i2s-plat.o snd-s
 
 snd-soc-loongson-i2s-y := loongson_i2s.o
 
+obj-$(CONFIG_SND_LOONGSON1_AC97) += loongson1_ac97.o
+
 #Machine Support
 snd-soc-loongson-card-y := loongson_card.o
 obj-$(CONFIG_SND_SOC_LOONGSON_CARD) += snd-soc-loongson-card.o
diff --git a/sound/soc/loongson/loongson1_ac97.c b/sound/soc/loongson/loongson1_ac97.c
new file mode 100644
index 000000000000..84901900ad43
--- /dev/null
+++ b/sound/soc/loongson/loongson1_ac97.c
@@ -0,0 +1,398 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * AC97 Controller Driver for Loongson-1 SoC
+ *
+ * Copyright (C) 2025 Keguang Zhang <keguang.zhang@gmail.com>
+ */
+
+#include <linux/bitfield.h>
+#include <linux/dma-mapping.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#include <sound/dmaengine_pcm.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+/* Loongson-1 AC97 Controller Registers */
+#define AC97_CSR		0x0
+#define AC97_OCC0		0x4
+#define AC97_ICC		0x10
+#define AC97_CRAC		0x18
+#define AC97_INTRAW		0x54
+#define AC97_INTM		0x58
+#define AC97_INT_CW_CLR		0x68
+#define AC97_INT_CR_CLR		0x6c
+
+/* Control Status Register Bits (CSR) */
+#define CSR_RESUME		BIT(1)
+#define CSR_RST_FORCE		BIT(0)
+
+/* MIC Channel Configuration Bits */
+#define M_DMA_EN		BIT(22)
+#define M_FIFO_THRES		GENMASK(21, 20)
+#define M_FIFO_THRES_FULL	FIELD_PREP(M_FIFO_THRES, 3)
+#define M_FIFO_THRES_HALF	FIELD_PREP(M_FIFO_THRES, 1)
+#define M_FIFO_THRES_QUARTER	FIELD_PREP(M_FIFO_THRES, 0)
+#define M_SW			GENMASK(19, 18)
+#define M_SW_16_BITS		FIELD_PREP(M_SW, 2)
+#define M_SW_8_BITS		FIELD_PREP(M_SW, 0)
+#define M_VSR			BIT(17)
+#define M_CH_EN			BIT(16)
+/* Right Channel Configuration Bits */
+#define R_DMA_EN		BIT(14)
+#define R_FIFO_THRES		GENMASK(13, 12)
+#define R_FIFO_THRES_EMPTY	FIELD_PREP(R_FIFO_THRES, 3)
+#define R_FIFO_THRES_HALF	FIELD_PREP(R_FIFO_THRES, 1)
+#define R_FIFO_THRES_QUARTER	FIELD_PREP(R_FIFO_THRES, 0)
+#define R_SW			GENMASK(11, 10)
+#define R_SW_16_BITS		FIELD_PREP(R_SW, 2)
+#define R_SW_8_BITS		FIELD_PREP(R_SW, 0)
+#define R_VSR			BIT(9)
+#define R_CH_EN			BIT(8)
+/* Left Channel Configuration Bits */
+#define L_DMA_EN		BIT(6)
+#define L_FIFO_THRES		GENMASK(5, 4)
+#define L_FIFO_THRES_EMPTY	FIELD_PREP(L_FIFO_THRES, 3)
+#define L_FIFO_THRES_HALF	FIELD_PREP(L_FIFO_THRES, 1)
+#define L_FIFO_THRES_QUARTER	FIELD_PREP(L_FIFO_THRES, 0)
+#define L_SW			GENMASK(3, 2)
+#define L_SW_16_BITS		FIELD_PREP(L_SW, 2)
+#define L_SW_8_BITS		FIELD_PREP(L_SW, 0)
+#define L_VSR			BIT(1)
+#define L_CH_EN			BIT(0)
+
+/* Codec Register Access Command Bits (CRAC) */
+#define CODEC_WR		BIT(31)
+#define CODEC_ADR		GENMASK(22, 16)
+#define CODEC_DAT		GENMASK(15, 0)
+
+/* Interrupt Register (INTRAW) */
+#define CW_DONE			BIT(1)
+#define CR_DONE			BIT(0)
+
+#define LS1X_AC97_DMA_TX_EN		BIT(31)
+#define LS1X_AC97_DMA_STEREO		BIT(30)
+#define LS1X_AC97_DMA_TX_BYTES		GENMASK(29, 28)
+#define LS1X_AC97_DMA_TX_4_BYTES	FIELD_PREP(LS1X_AC97_DMA_TX_BYTES, 2)
+#define LS1X_AC97_DMA_TX_2_BYTES	FIELD_PREP(LS1X_AC97_DMA_TX_BYTES, 1)
+#define LS1X_AC97_DMA_TX_1_BYTE		FIELD_PREP(LS1X_AC97_DMA_TX_BYTES, 0)
+#define LS1X_AC97_DMA_DADDR_MASK	GENMASK(27, 0)
+
+#define LS1X_AC97_DMA_FIFO_SIZE		128
+
+#define LS1X_AC97_TIMEOUT		3000
+
+struct ls1x_ac97 {
+	void __iomem *reg_base;
+	struct regmap *regmap;
+	dma_addr_t tx_dma_base;
+	dma_addr_t rx_dma_base;
+	struct snd_dmaengine_dai_dma_data capture_dma_data;
+	struct snd_dmaengine_dai_dma_data playback_dma_data;
+};
+
+static struct ls1x_ac97 *ls1x_ac97;
+
+static const struct regmap_config ls1x_ac97_regmap_config = {
+	.reg_bits = 32,
+	.val_bits = 32,
+	.reg_stride = 4,
+};
+
+static void ls1x_ac97_reset(struct snd_ac97 *ac97)
+{
+	int val;
+
+	regmap_write(ls1x_ac97->regmap, AC97_CSR, CSR_RST_FORCE);
+	regmap_read_poll_timeout(ls1x_ac97->regmap, AC97_CSR, val,
+				 !(val & CSR_RESUME), 0, LS1X_AC97_TIMEOUT);
+}
+
+static void ls1x_ac97_write(struct snd_ac97 *ac97, unsigned short reg, unsigned short val)
+{
+	int tmp, ret;
+
+	tmp = FIELD_PREP(CODEC_ADR, reg) | FIELD_PREP(CODEC_DAT, val);
+	regmap_write(ls1x_ac97->regmap, AC97_CRAC, tmp);
+	ret = regmap_read_poll_timeout(ls1x_ac97->regmap, AC97_INTRAW, tmp,
+				       (tmp & CW_DONE), 0, LS1X_AC97_TIMEOUT);
+	if (ret)
+		pr_err("timeout on AC97 write! %d\n", ret);
+
+	regmap_read(ls1x_ac97->regmap, AC97_INT_CW_CLR, &ret);
+}
+
+static unsigned short ls1x_ac97_read(struct snd_ac97 *ac97, unsigned short reg)
+{
+	int val, ret;
+
+	val = CODEC_WR | FIELD_PREP(CODEC_ADR, reg);
+	regmap_write(ls1x_ac97->regmap, AC97_CRAC, val);
+	ret = regmap_read_poll_timeout(ls1x_ac97->regmap, AC97_INTRAW, val,
+				       (val & CR_DONE), 0, LS1X_AC97_TIMEOUT);
+	if (ret) {
+		pr_err("timeout on AC97 read! %d\n", ret);
+		return ret;
+	}
+
+	regmap_read(ls1x_ac97->regmap, AC97_INT_CR_CLR, &ret);
+	regmap_read(ls1x_ac97->regmap, AC97_CRAC, &ret);
+
+	return (ret & CODEC_DAT);
+}
+
+static void ls1x_ac97_init(struct snd_ac97 *ac97)
+{
+	writel(0, ls1x_ac97->reg_base + AC97_INTRAW);
+	writel(0, ls1x_ac97->reg_base + AC97_INTM);
+
+	/* Config output channels */
+	regmap_update_bits(ls1x_ac97->regmap, AC97_OCC0,
+			   R_DMA_EN | R_FIFO_THRES | R_CH_EN |
+			   L_DMA_EN | L_FIFO_THRES | L_CH_EN,
+			   R_DMA_EN | R_FIFO_THRES_EMPTY | R_CH_EN |
+			   L_DMA_EN | L_FIFO_THRES_EMPTY | L_CH_EN);
+
+	/* Config inputs channel */
+	regmap_update_bits(ls1x_ac97->regmap, AC97_ICC,
+			   M_DMA_EN | M_FIFO_THRES | M_CH_EN |
+			   R_DMA_EN | R_FIFO_THRES | R_CH_EN |
+			   L_DMA_EN | L_FIFO_THRES | L_CH_EN,
+			   M_DMA_EN | M_FIFO_THRES_FULL | M_CH_EN |
+			   R_DMA_EN | R_FIFO_THRES_EMPTY | R_CH_EN |
+			   L_DMA_EN | L_FIFO_THRES_EMPTY | L_CH_EN);
+
+	if (ac97->ext_id & AC97_EI_VRA) {
+		regmap_update_bits(ls1x_ac97->regmap, AC97_OCC0, R_VSR | L_VSR, R_VSR | L_VSR);
+		regmap_update_bits(ls1x_ac97->regmap, AC97_ICC, M_VSR, M_VSR);
+	}
+}
+
+static struct snd_ac97_bus_ops ls1x_ac97_ops = {
+	.reset	= ls1x_ac97_reset,
+	.write	= ls1x_ac97_write,
+	.read	= ls1x_ac97_read,
+	.init	= ls1x_ac97_init,
+};
+
+static int ls1x_ac97_hw_params(struct snd_pcm_substream *substream,
+			       struct snd_pcm_hw_params *params,
+			       struct snd_soc_dai *cpu_dai)
+{
+	struct ls1x_ac97 *ac97 = dev_get_drvdata(cpu_dai->dev);
+	struct snd_dmaengine_dai_dma_data *dma_data = snd_soc_dai_get_dma_data(cpu_dai, substream);
+
+	switch (params_channels(params)) {
+	case 1:
+		dma_data->addr &= ~LS1X_AC97_DMA_STEREO;
+		break;
+	case 2:
+		dma_data->addr |= LS1X_AC97_DMA_STEREO;
+		break;
+	default:
+		dev_err(cpu_dai->dev, "unsupported channels! %d\n", params_channels(params));
+		return -EINVAL;
+	}
+
+	switch (params_format(params)) {
+	case SNDRV_PCM_FORMAT_S8:
+	case SNDRV_PCM_FORMAT_U8:
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+			regmap_update_bits(ac97->regmap, AC97_OCC0,
+					   R_SW | L_SW,
+					   R_SW_8_BITS | L_SW_8_BITS);
+		else
+			regmap_update_bits(ac97->regmap, AC97_ICC,
+					   M_SW | R_SW | L_SW,
+					   M_SW_8_BITS | R_SW_8_BITS | L_SW_8_BITS);
+		break;
+	case SNDRV_PCM_FORMAT_S16_LE:
+	case SNDRV_PCM_FORMAT_U16_LE:
+	case SNDRV_PCM_FORMAT_S16_BE:
+	case SNDRV_PCM_FORMAT_U16_BE:
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+			regmap_update_bits(ac97->regmap, AC97_OCC0,
+					   R_SW | L_SW,
+					   R_SW_16_BITS | L_SW_16_BITS);
+		else
+			regmap_update_bits(ac97->regmap, AC97_ICC,
+					   M_SW | R_SW | L_SW,
+					   M_SW_16_BITS | R_SW_16_BITS | L_SW_16_BITS);
+		break;
+	default:
+		dev_err(cpu_dai->dev, "unsupported format! %d\n", params_format(params));
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int ls1x_ac97_dai_probe(struct snd_soc_dai *cpu_dai)
+{
+	struct ls1x_ac97 *ac97 = dev_get_drvdata(cpu_dai->dev);
+
+	ac97->capture_dma_data.addr = ac97->rx_dma_base & LS1X_AC97_DMA_DADDR_MASK;
+	ac97->capture_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+	ac97->capture_dma_data.fifo_size = LS1X_AC97_DMA_FIFO_SIZE;
+
+	ac97->playback_dma_data.addr = ac97->tx_dma_base & LS1X_AC97_DMA_DADDR_MASK;
+	ac97->playback_dma_data.addr |= LS1X_AC97_DMA_TX_4_BYTES;
+	ac97->playback_dma_data.addr |= LS1X_AC97_DMA_TX_EN;
+	ac97->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+	ac97->playback_dma_data.fifo_size = LS1X_AC97_DMA_FIFO_SIZE;
+
+	snd_soc_dai_init_dma_data(cpu_dai, &ac97->playback_dma_data, &ac97->capture_dma_data);
+	snd_soc_dai_set_drvdata(cpu_dai, ac97);
+
+	return 0;
+}
+
+static const struct snd_soc_dai_ops ls1x_ac97_dai_ops = {
+	.probe		= ls1x_ac97_dai_probe,
+	.hw_params	= ls1x_ac97_hw_params,
+};
+
+#define LS1X_AC97_FMTS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 |\
+	SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |\
+	SNDRV_PCM_FMTBIT_U16_LE	| SNDRV_PCM_FMTBIT_U16_BE)
+
+static struct snd_soc_dai_driver ls1x_ac97_dai[] = {
+	{
+		.name = "ls1x-ac97",
+		.playback = {
+			.stream_name = "AC97 Playback",
+			.channels_min = 1,
+			.channels_max = 2,
+			.rates = SNDRV_PCM_RATE_8000_48000,
+			.formats = LS1X_AC97_FMTS,
+		},
+		.capture = {
+			.stream_name = "AC97 Capture",
+			.channels_min = 1,
+			.channels_max = 2,
+			.rates = SNDRV_PCM_RATE_8000_48000,
+			.formats = LS1X_AC97_FMTS,
+		},
+		.ops = &ls1x_ac97_dai_ops,
+	},
+};
+
+static const struct snd_soc_component_driver ls1x_ac97_component = {
+	.name = KBUILD_MODNAME,
+	.legacy_dai_naming = 1,
+};
+
+static int ls1x_ac97_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct ls1x_ac97 *ac97;
+	struct resource *res;
+	int ret;
+
+	ac97 = devm_kzalloc(dev, sizeof(struct ls1x_ac97), GFP_KERNEL);
+	if (!ac97)
+		return -ENOMEM;
+	ls1x_ac97 = ac97;
+	platform_set_drvdata(pdev, ac97);
+
+	ac97->reg_base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(ac97->reg_base))
+		return PTR_ERR(ac97->reg_base);
+
+	ac97->regmap = devm_regmap_init_mmio(dev, ac97->reg_base, &ls1x_ac97_regmap_config);
+	if (IS_ERR(ac97->regmap))
+		return dev_err_probe(dev, PTR_ERR(ac97->regmap), "devm_regmap_init_mmio failed\n");
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "audio-tx");
+	if (!res)
+		return dev_err_probe(dev, -EINVAL, "Missing 'audio-tx' in reg-names property\n");
+
+	ac97->tx_dma_base = dma_map_resource(dev, res->start, resource_size(res),
+					     DMA_TO_DEVICE, 0);
+	if (dma_mapping_error(dev, ac97->tx_dma_base))
+		return -ENXIO;
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "audio-rx");
+	if (!res)
+		return dev_err_probe(dev, -EINVAL, "Missing 'audio-rx' in reg-names property\n");
+
+	ac97->rx_dma_base = dma_map_resource(dev, res->start, resource_size(res),
+					     DMA_FROM_DEVICE, 0);
+	if (dma_mapping_error(dev, ac97->rx_dma_base))
+		return -ENXIO;
+
+	ret = devm_snd_dmaengine_pcm_register(dev, NULL, 0);
+	if (ret)
+		dev_err_probe(dev, ret, "failed to register PCM\n");
+
+	ret = devm_snd_soc_register_component(dev, &ls1x_ac97_component,
+					      ls1x_ac97_dai, ARRAY_SIZE(ls1x_ac97_dai));
+	if (ret)
+		dev_err_probe(dev, ret, "failed to register DAI\n");
+
+	return snd_soc_set_ac97_ops(&ls1x_ac97_ops);
+}
+
+static void ls1x_ac97_remove(struct platform_device *pdev)
+{
+	ls1x_ac97 = NULL;
+	snd_soc_set_ac97_ops(NULL);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int ls1x_ac97_suspend(struct device *dev)
+{
+	int val;
+
+	regmap_clear_bits(ls1x_ac97->regmap, AC97_OCC0, R_DMA_EN | R_CH_EN | L_DMA_EN | L_CH_EN);
+	regmap_clear_bits(ls1x_ac97->regmap, AC97_ICC,
+			  M_DMA_EN | M_CH_EN | R_DMA_EN | R_CH_EN | L_DMA_EN | L_CH_EN);
+	regmap_set_bits(ls1x_ac97->regmap, AC97_CSR, CSR_RESUME);
+
+	return regmap_read_poll_timeout(ls1x_ac97->regmap, AC97_CSR, val,
+					(val & CSR_RESUME), 0, LS1X_AC97_TIMEOUT);
+}
+
+static int ls1x_ac97_resume(struct device *dev)
+{
+	int val;
+
+	regmap_set_bits(ls1x_ac97->regmap, AC97_OCC0, R_DMA_EN | R_CH_EN | L_DMA_EN | L_CH_EN);
+	regmap_set_bits(ls1x_ac97->regmap, AC97_ICC,
+			M_DMA_EN | M_CH_EN | R_DMA_EN | R_CH_EN | L_DMA_EN | L_CH_EN);
+	regmap_set_bits(ls1x_ac97->regmap, AC97_CSR, CSR_RESUME);
+
+	return regmap_read_poll_timeout(ls1x_ac97->regmap, AC97_CSR, val,
+					!(val & CSR_RESUME), 0, LS1X_AC97_TIMEOUT);
+}
+#endif
+
+static const struct dev_pm_ops ls1x_ac97_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(ls1x_ac97_suspend, ls1x_ac97_resume)
+};
+
+static const struct of_device_id ls1x_ac97_match[] = {
+	{ .compatible = "loongson,ls1b-ac97" },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, ls1x_ac97_match);
+
+static struct platform_driver ls1x_ac97_driver = {
+	.probe		= ls1x_ac97_probe,
+	.remove		= ls1x_ac97_remove,
+	.driver		= {
+		.name	= KBUILD_MODNAME,
+		.of_match_table = ls1x_ac97_match,
+		.pm = &ls1x_ac97_pm_ops,
+	},
+};
+
+module_platform_driver(ls1x_ac97_driver);
+
+MODULE_AUTHOR("Keguang Zhang <keguang.zhang@gmail.com>");
+MODULE_DESCRIPTION("Loongson-1 AC97 Controller Driver");
+MODULE_LICENSE("GPL");

-- 
2.43.0

[PATCH v2 4/4] ASoC: ac97: Add DT support

[Keguang Zhang via B4 Relay]

From: Keguang Zhang <keguang.zhang@gmail.com>

Add an of_match_table with 'realtek,alc203' to provide
DT support for the AC97 generic codec driver.

Signed-off-by: Keguang Zhang <keguang.zhang@gmail.com>
---
 sound/soc/codecs/ac97.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/sound/soc/codecs/ac97.c b/sound/soc/codecs/ac97.c
index 0e013edfe63d..d8444a083af2 100644
--- a/sound/soc/codecs/ac97.c
+++ b/sound/soc/codecs/ac97.c
@@ -13,6 +13,7 @@
 #include <linux/kernel.h>
 #include <linux/device.h>
 #include <linux/module.h>
+#include <linux/of.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/ac97_codec.h>
@@ -127,9 +128,18 @@ static int ac97_probe(struct platform_device *pdev)
 			&soc_component_dev_ac97, &ac97_dai, 1);
 }
 
+#ifdef CONFIG_OF
+static const struct of_device_id ac97_codec_of_match[] = {
+	{ .compatible = "realtek,alc203", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, ac97_codec_of_match);
+#endif
+
 static struct platform_driver ac97_codec_driver = {
 	.driver = {
 		.name = "ac97-codec",
+		.of_match_table = of_match_ptr(ac97_codec_of_match),
 	},
 
 	.probe = ac97_probe,

-- 
2.43.0

Re: [PATCH v2 2/4] ASoC: dt-bindings: Add Realtek ALC203 Codec

[Krzysztof Kozlowski]

On Wed, Apr 09, 2025 at 06:29:32PM GMT, Keguang Zhang wrote:
> Add devicetree binding document for Realtek ALC203 codec.
> 
> Signed-off-by: Keguang Zhang <keguang.zhang@gmail.com>
> ---
>  .../devicetree/bindings/sound/realtek,alc203.yaml  | 36 ++++++++++++++++++++++
>  1 file changed, 36 insertions(+)

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Best regards,
Krzysztof

Re: [PATCH v2 0/4] Add support for Loongson-1 AC97

[Mark Brown]

On Wed, 09 Apr 2025 18:29:30 +0800, Keguang Zhang wrote:
> Add the driver and dt-binding document for Loongson-1 AC97.
> Add the dt-binding document for Realtek ALC203 Codec.
> Add DT support for the AC97 generic codec driver.
> 
> 

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next

Thanks!

[1/4] ASoC: dt-bindings: Add Loongson-1 AC97 Controller
      commit: d60007fc9b739d939d5b6148c25805f206c836f9
[2/4] ASoC: dt-bindings: Add Realtek ALC203 Codec
      commit: 0142b45000457b9d112d40d5685d0898e51ed52f
[3/4] ASoC: loongson: Add Loongson-1 AC97 Driver
      commit: 1fc55a2baef5289c9535ce10a4f5f37664ce854a
[4/4] ASoC: ac97: Add DT support
      commit: 436a3cc8afbf34bb68166c2c5c19ca5113c0c756

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark