[PATCH 1/6] ASoC: amd: acp: Add generic support for PDM controller on ACP

[PATCH 1/6] ASoC: amd: acp: Add generic support for PDM controller on ACP

[Ajit Kumar Pandey]

Add driver module for PDM controller on ACP IP block. Expose dai
ops to configure ACP_WOV_PDM_BLOCK registers on ACP. Such dai ops
will be used by platform specific driver module to register dmic
related dai with ASoC.

Signed-off-by: Ajit Kumar Pandey <AjitKumar.Pandey@amd.com>
---
 sound/soc/amd/acp/Kconfig            |   3 +
 sound/soc/amd/acp/Makefile           |   2 +
 sound/soc/amd/acp/acp-pdm.c          | 181 +++++++++++++++++++++++++++
 sound/soc/amd/acp/amd.h              |   9 +-
 sound/soc/amd/acp/chip_offset_byte.h |  20 +++
 5 files changed, 214 insertions(+), 1 deletion(-)
 create mode 100644 sound/soc/amd/acp/acp-pdm.c

diff --git a/sound/soc/amd/acp/Kconfig b/sound/soc/amd/acp/Kconfig
index d5838df3064b..2e6d0259f2e9 100644
--- a/sound/soc/amd/acp/Kconfig
+++ b/sound/soc/amd/acp/Kconfig
@@ -15,6 +15,9 @@ config SND_SOC_AMD_ACP_COMMON
 
 if SND_SOC_AMD_ACP_COMMON
 
+config SND_SOC_AMD_ACP_PDM
+	tristate
+
 config SND_SOC_AMD_ACP_I2S
 	tristate
 
diff --git a/sound/soc/amd/acp/Makefile b/sound/soc/amd/acp/Makefile
index 16c144c2965c..66cac95432f6 100644
--- a/sound/soc/amd/acp/Makefile
+++ b/sound/soc/amd/acp/Makefile
@@ -7,6 +7,7 @@
 #common acp driver
 snd-acp-pcm-objs     := acp-platform.o
 snd-acp-i2s-objs     := acp-i2s.o
+snd-acp-pdm-objs     := acp-pdm.o
 
 #platform specific driver
 snd-acp-renoir-objs     := acp-renoir.o
@@ -18,6 +19,7 @@ snd-acp-sof-mach-objs     := acp-sof-mach.o
 
 obj-$(CONFIG_SND_SOC_AMD_ACP_PCM) += snd-acp-pcm.o
 obj-$(CONFIG_SND_SOC_AMD_ACP_I2S) += snd-acp-i2s.o
+obj-$(CONFIG_SND_SOC_AMD_ACP_PDM) += snd-acp-pdm.o
 
 obj-$(CONFIG_SND_AMD_ASOC_RENOIR) += snd-acp-renoir.o
 
diff --git a/sound/soc/amd/acp/acp-pdm.c b/sound/soc/amd/acp/acp-pdm.c
new file mode 100644
index 000000000000..cb9bbd795eee
--- /dev/null
+++ b/sound/soc/amd/acp/acp-pdm.c
@@ -0,0 +1,181 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
+//
+// This file is provided under a dual BSD/GPLv2 license. When using or
+// redistributing this file, you may do so under either license.
+//
+// Copyright(c) 2021 Advanced Micro Devices, Inc.
+//
+// Authors: Ajit Kumar Pandey <AjitKumar.Pandey@amd.com>
+//	    Vijendar Mukunda <Vijendar.Mukunda@amd.com>
+//
+
+/*
+ * Generic Hardware interface for ACP Audio PDM controller
+ */
+
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-dai.h>
+#include <linux/dma-mapping.h>
+
+#include "amd.h"
+
+#define DRV_NAME "acp-pdm"
+
+#define PDM_DMA_STAT		0x10
+#define PDM_DMA_INTR_MASK	0x10000
+#define PDM_DEC_64		0x2
+#define PDM_CLK_FREQ_MASK	0x07
+#define PDM_MISC_CTRL_MASK	0x10
+#define PDM_ENABLE		0x01
+#define PDM_DISABLE		0x00
+#define DMA_EN_MASK		0x02
+#define DELAY_US		5
+#define PDM_TIMEOUT		1000
+
+static int acp_dmic_dai_trigger(struct snd_pcm_substream *substream,
+			       int cmd, struct snd_soc_dai *dai)
+{
+	struct acp_stream *stream = substream->runtime->private_data;
+	struct device *dev = dai->component->dev;
+	struct acp_dev_data *adata = dev_get_drvdata(dev);
+	u32 physical_addr, size_dmic, period_bytes;
+	unsigned int dma_enable;
+	int ret = 0;
+
+	period_bytes = frames_to_bytes(substream->runtime,
+			substream->runtime->period_size);
+	size_dmic = frames_to_bytes(substream->runtime,
+			substream->runtime->buffer_size);
+
+	physical_addr = stream->reg_offset + MEM_WINDOW_START;
+
+	/* Init DMIC Ring buffer */
+	writel(physical_addr, adata->acp_base + ACP_WOV_RX_RINGBUFADDR);
+	writel(size_dmic, adata->acp_base + ACP_WOV_RX_RINGBUFSIZE);
+	writel(period_bytes, adata->acp_base + ACP_WOV_RX_INTR_WATERMARK_SIZE);
+	writel(0x01, adata->acp_base + ACPAXI2AXI_ATU_CTRL);
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		dma_enable = readl(adata->acp_base + ACP_WOV_PDM_DMA_ENABLE);
+		if (!(dma_enable & DMA_EN_MASK)) {
+			writel(PDM_ENABLE, adata->acp_base + ACP_WOV_PDM_ENABLE);
+			writel(PDM_ENABLE, adata->acp_base + ACP_WOV_PDM_DMA_ENABLE);
+		}
+
+		ret = readl_poll_timeout_atomic(adata->acp_base + ACP_WOV_PDM_DMA_ENABLE,
+						dma_enable, (dma_enable & DMA_EN_MASK),
+						DELAY_US, PDM_TIMEOUT);
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		dma_enable = readl(adata->acp_base + ACP_WOV_PDM_DMA_ENABLE);
+		if ((dma_enable & DMA_EN_MASK)) {
+			writel(PDM_DISABLE, adata->acp_base + ACP_WOV_PDM_ENABLE);
+			writel(PDM_DISABLE, adata->acp_base + ACP_WOV_PDM_DMA_ENABLE);
+
+		}
+
+		ret = readl_poll_timeout_atomic(adata->acp_base + ACP_WOV_PDM_DMA_ENABLE,
+						dma_enable, !(dma_enable & DMA_EN_MASK),
+						DELAY_US, PDM_TIMEOUT);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	return ret;
+}
+
+static int acp_dmic_hwparams(struct snd_pcm_substream *substream,
+	struct snd_pcm_hw_params *hwparams, struct snd_soc_dai *dai)
+{
+	struct device *dev = dai->component->dev;
+	struct acp_dev_data *adata = dev_get_drvdata(dev);
+	unsigned int dmic_ctrl, channels, ch_mask;
+
+	/* Enable default DMIC clk */
+	writel(PDM_CLK_FREQ_MASK, adata->acp_base + ACP_WOV_CLK_CTRL);
+	dmic_ctrl = readl(adata->acp_base + ACP_WOV_MISC_CTRL);
+	dmic_ctrl |= PDM_MISC_CTRL_MASK;
+	writel(dmic_ctrl, adata->acp_base + ACP_WOV_MISC_CTRL);
+
+	channels = params_channels(hwparams);
+	switch (channels) {
+	case 2:
+		ch_mask = 0;
+		break;
+	case 4:
+		ch_mask = 1;
+		break;
+	case 6:
+		ch_mask = 2;
+		break;
+	default:
+		dev_err(dev, "Invalid channels %d\n", channels);
+		return -EINVAL;
+	}
+
+	if (params_format(hwparams) != SNDRV_PCM_FORMAT_S32_LE) {
+		dev_err(dai->dev, "Invalid format:%d\n", params_format(hwparams));
+		return -EINVAL;
+	}
+
+	writel(ch_mask, adata->acp_base + ACP_WOV_PDM_NO_OF_CHANNELS);
+	writel(PDM_DEC_64, adata->acp_base + ACP_WOV_PDM_DECIMATION_FACTOR);
+
+	return 0;
+}
+
+static int acp_dmic_dai_startup(struct snd_pcm_substream *substream,
+		struct snd_soc_dai *dai)
+{
+	struct acp_stream *stream = substream->runtime->private_data;
+	struct device *dev = dai->component->dev;
+	struct acp_dev_data *adata = dev_get_drvdata(dev);
+	u32 ext_int_ctrl;
+
+	stream->dai_id = DMIC_INSTANCE;
+	stream->irq_bit = BIT(PDM_DMA_STAT);
+	stream->pte_offset = ACP_SRAM_PDM_PTE_OFFSET;
+
+	/* Enable DMIC Interrupts */
+	ext_int_ctrl = readl(adata->acp_base + ACP_EXTERNAL_INTR_CNTL);
+	ext_int_ctrl |= PDM_DMA_INTR_MASK;
+	writel(ext_int_ctrl, adata->acp_base + ACP_EXTERNAL_INTR_CNTL);
+
+	return 0;
+}
+
+static void acp_dmic_dai_shutdown(struct snd_pcm_substream *substream,
+		struct snd_soc_dai *dai)
+{
+	struct device *dev = dai->component->dev;
+	struct acp_dev_data *adata = dev_get_drvdata(dev);
+	u32 ext_int_ctrl;
+
+	/* Disable DMIC interrrupts */
+	ext_int_ctrl = readl(adata->acp_base + ACP_EXTERNAL_INTR_CNTL);
+	ext_int_ctrl |= ~PDM_DMA_INTR_MASK;
+	writel(ext_int_ctrl, adata->acp_base + ACP_EXTERNAL_INTR_CNTL);
+}
+
+const struct snd_soc_dai_ops acp_dmic_dai_ops = {
+	.hw_params = acp_dmic_hwparams,
+	.trigger   = acp_dmic_dai_trigger,
+	.startup = acp_dmic_dai_startup,
+	.shutdown = acp_dmic_dai_shutdown,
+};
+EXPORT_SYMBOL_NS_GPL(acp_dmic_dai_ops, SND_SOC_ACP_COMMON);
+
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:"DRV_NAME);
diff --git a/sound/soc/amd/acp/amd.h b/sound/soc/amd/acp/amd.h
index 8eee3d34774b..567355209a5c 100644
--- a/sound/soc/amd/acp/amd.h
+++ b/sound/soc/amd/acp/amd.h
@@ -17,8 +17,9 @@
 
 #define I2S_SP_INSTANCE			0x00
 #define I2S_BT_INSTANCE			0x01
+#define DMIC_INSTANCE			0x02
 
-#define MEM_WINDOW_START		0x4000000
+#define MEM_WINDOW_START		0x4080000
 
 #define ACP_I2S_REG_START		0x1242400
 #define ACP_I2S_REG_END			0x1242810
@@ -38,6 +39,7 @@
 #define ACP_SRAM_SP_CP_PTE_OFFSET	0x100
 #define ACP_SRAM_BT_PB_PTE_OFFSET	0x200
 #define ACP_SRAM_BT_CP_PTE_OFFSET	0x300
+#define ACP_SRAM_PDM_PTE_OFFSET		0x400
 #define PAGE_SIZE_4K_ENABLE		0x2
 
 #define I2S_SP_TX_MEM_WINDOW_START	0x4000000
@@ -96,6 +98,7 @@ struct acp_dev_data {
 };
 
 extern const struct snd_soc_dai_ops asoc_acp_cpu_dai_ops;
+extern const struct snd_soc_dai_ops acp_dmic_dai_ops;
 
 int asoc_acp_i2s_probe(struct snd_soc_dai *dai);
 int acp_platform_register(struct device *dev);
@@ -131,6 +134,10 @@ static inline u64 acp_get_byte_count(struct acp_dev_data *adata, int dai_id, int
 			high = readl(adata->acp_base + ACP_I2S_RX_LINEARPOSITIONCNTR_HIGH);
 			low = readl(adata->acp_base + ACP_I2S_RX_LINEARPOSITIONCNTR_LOW);
 			break;
+		case DMIC_INSTANCE:
+			high = readl(adata->acp_base + ACP_WOV_RX_LINEARPOSITIONCNTR_HIGH);
+			low = readl(adata->acp_base + ACP_WOV_RX_LINEARPOSITIONCNTR_LOW);
+			break;
 		default:
 			dev_err(adata->dev, "Invalid dai id %x\n", dai_id);
 			return -EINVAL;
diff --git a/sound/soc/amd/acp/chip_offset_byte.h b/sound/soc/amd/acp/chip_offset_byte.h
index c7f77e975dc7..e38589a142e9 100644
--- a/sound/soc/amd/acp/chip_offset_byte.h
+++ b/sound/soc/amd/acp/chip_offset_byte.h
@@ -73,4 +73,24 @@
 #define ACP_BTTDM_ITER                                0x280C
 #define ACP_BTTDM_TXFRMT                              0x2810
 
+/* Registers from ACP_WOV_PDM block */
+
+#define ACP_WOV_PDM_ENABLE                            0x2C04
+#define ACP_WOV_PDM_DMA_ENABLE                        0x2C08
+#define ACP_WOV_RX_RINGBUFADDR                        0x2C0C
+#define ACP_WOV_RX_RINGBUFSIZE                        0x2C10
+#define ACP_WOV_RX_LINKPOSITIONCNTR                   0x2C14
+#define ACP_WOV_RX_LINEARPOSITIONCNTR_HIGH            0x2C18
+#define ACP_WOV_RX_LINEARPOSITIONCNTR_LOW             0x2C1C
+#define ACP_WOV_RX_INTR_WATERMARK_SIZE                0x2C20
+#define ACP_WOV_PDM_FIFO_FLUSH                        0x2C24
+#define ACP_WOV_PDM_NO_OF_CHANNELS                    0x2C28
+#define ACP_WOV_PDM_DECIMATION_FACTOR                 0x2C2C
+#define ACP_WOV_PDM_VAD_CTRL                          0x2C30
+#define ACP_WOV_BUFFER_STATUS                         0x2C58
+#define ACP_WOV_MISC_CTRL                             0x2C5C
+#define ACP_WOV_CLK_CTRL                              0x2C60
+#define ACP_PDM_VAD_DYNAMIC_CLK_GATING_EN             0x2C64
+#define ACP_WOV_ERROR_STATUS_REGISTER                 0x2C68
+
 #endif
-- 
2.25.1

[PATCH 2/6] ASoC: amd: acp: Add PDM controller based dmic dai for Renoir

[Ajit Kumar Pandey]

Renoir ACP IP has a PDM controller block. Add DMIC dai instance in
dai_driver struct to enable dmic capture support on Renoir platform.

Signed-off-by: Ajit Kumar Pandey <AjitKumar.Pandey@amd.com>
---
 sound/soc/amd/acp/Kconfig      |  1 +
 sound/soc/amd/acp/acp-renoir.c | 13 +++++++++++++
 2 files changed, 14 insertions(+)

diff --git a/sound/soc/amd/acp/Kconfig b/sound/soc/amd/acp/Kconfig
index 2e6d0259f2e9..f4ca7843391b 100644
--- a/sound/soc/amd/acp/Kconfig
+++ b/sound/soc/amd/acp/Kconfig
@@ -29,6 +29,7 @@ config SND_AMD_ASOC_RENOIR
 	tristate "AMD ACP ASOC Renoir Support"
 	select SND_SOC_AMD_ACP_PCM
 	select SND_SOC_AMD_ACP_I2S
+	select SND_SOC_AMD_ACP_PDM
 	depends on X86 && PCI
 	help
 	  This option enables Renoir I2S support on AMD platform.
diff --git a/sound/soc/amd/acp/acp-renoir.c b/sound/soc/amd/acp/acp-renoir.c
index 9b321a055b52..770a57a0677b 100644
--- a/sound/soc/amd/acp/acp-renoir.c
+++ b/sound/soc/amd/acp/acp-renoir.c
@@ -97,6 +97,19 @@ static struct snd_soc_dai_driver acp_renoir_dai[] = {
 	.ops = &asoc_acp_cpu_dai_ops,
 	.probe = &asoc_acp_i2s_probe,
 },
+{
+	.name = "acp-pdm-dmic",
+	.id = DMIC_INSTANCE,
+	.capture = {
+		.rates = SNDRV_PCM_RATE_8000_48000,
+		.formats = SNDRV_PCM_FMTBIT_S32_LE,
+		.channels_min = 2,
+		.channels_max = 2,
+		.rate_min = 8000,
+		.rate_max = 48000,
+	},
+	.ops = &acp_dmic_dai_ops,
+},
 };
 
 static int renoir_audio_probe(struct platform_device *pdev)
-- 
2.25.1

[PATCH 3/6] ASoC: amd: acp: Add generic PCI driver module for ACP device

[Ajit Kumar Pandey]

Audio Co-processor or ACP IP block on AMD's SOC is connected via
PCI bus interface, hence needs to be register as a PCI device. We
have same PCI device ID across multiple SOC's but with different
revision id for PCI hw. Add a generic PCI driver module for ACP
that registers ACP as a PCI device and also register a platform
device based on pci revision id. Any SOC's specific configuration
for ACP block will be done in platform driver probe. We have added
an initial support for ACP revision id 3 or ACP3X device.

Signed-off-by: Ajit Kumar Pandey <AjitKumar.Pandey@amd.com>
---
 sound/soc/amd/acp/Kconfig   |   6 ++
 sound/soc/amd/acp/Makefile  |   2 +
 sound/soc/amd/acp/acp-pci.c | 158 ++++++++++++++++++++++++++++++++++++
 sound/soc/amd/acp/amd.h     |  14 ++++
 sound/soc/amd/mach-config.h |   1 +
 5 files changed, 181 insertions(+)
 create mode 100644 sound/soc/amd/acp/acp-pci.c

diff --git a/sound/soc/amd/acp/Kconfig b/sound/soc/amd/acp/Kconfig
index f4ca7843391b..626e4a5cb06a 100644
--- a/sound/soc/amd/acp/Kconfig
+++ b/sound/soc/amd/acp/Kconfig
@@ -25,6 +25,12 @@ config SND_SOC_AMD_ACP_PCM
 	tristate
 	select SND_SOC_ACPI if ACPI
 
+config SND_SOC_AMD_ACP_PCI
+	tristate "AMD ACP PCI Driver Support"
+	depends on X86 && PCI
+	help
+	  This options enables generic PCI driver for ACP device.
+
 config SND_AMD_ASOC_RENOIR
 	tristate "AMD ACP ASOC Renoir Support"
 	select SND_SOC_AMD_ACP_PCM
diff --git a/sound/soc/amd/acp/Makefile b/sound/soc/amd/acp/Makefile
index 66cac95432f6..657ddfadf0bb 100644
--- a/sound/soc/amd/acp/Makefile
+++ b/sound/soc/amd/acp/Makefile
@@ -8,6 +8,7 @@
 snd-acp-pcm-objs     := acp-platform.o
 snd-acp-i2s-objs     := acp-i2s.o
 snd-acp-pdm-objs     := acp-pdm.o
+snd-acp-pci-objs     := acp-pci.o
 
 #platform specific driver
 snd-acp-renoir-objs     := acp-renoir.o
@@ -20,6 +21,7 @@ snd-acp-sof-mach-objs     := acp-sof-mach.o
 obj-$(CONFIG_SND_SOC_AMD_ACP_PCM) += snd-acp-pcm.o
 obj-$(CONFIG_SND_SOC_AMD_ACP_I2S) += snd-acp-i2s.o
 obj-$(CONFIG_SND_SOC_AMD_ACP_PDM) += snd-acp-pdm.o
+obj-$(CONFIG_SND_SOC_AMD_ACP_PCI) += snd-acp-pci.o
 
 obj-$(CONFIG_SND_AMD_ASOC_RENOIR) += snd-acp-renoir.o
 
diff --git a/sound/soc/amd/acp/acp-pci.c b/sound/soc/amd/acp/acp-pci.c
new file mode 100644
index 000000000000..7802c4ed5155
--- /dev/null
+++ b/sound/soc/amd/acp/acp-pci.c
@@ -0,0 +1,158 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
+//
+// This file is provided under a dual BSD/GPLv2 license. When using or
+// redistributing this file, you may do so under either license.
+//
+// Copyright(c) 2021 Advanced Micro Devices, Inc. All rights reserved.
+//
+// Authors: Ajit Kumar Pandey <AjitKumar.Pandey@amd.com>
+
+/*
+ * Generic PCI interface for ACP device
+ */
+
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/pm_runtime.h>
+
+#include "amd.h"
+#include "../mach-config.h"
+
+#define DRV_NAME "acp_pci"
+
+#define ACP3x_REG_START	0x1240000
+#define ACP3x_REG_END	0x125C000
+
+static struct platform_device *dmic_dev;
+static struct platform_device *pdev;
+
+static const struct resource acp3x_res[] = {
+	{
+		.start = 0,
+		.end = ACP3x_REG_END - ACP3x_REG_START,
+		.name = "acp_mem",
+		.flags = IORESOURCE_MEM,
+	},
+	{
+		.start = 0,
+		.end = 0,
+		.name = "acp_dai_irq",
+		.flags = IORESOURCE_IRQ,
+	},
+};
+
+static int acp_pci_probe(struct pci_dev *pci, const struct pci_device_id *pci_id)
+{
+	struct platform_device_info pdevinfo;
+	struct device *dev = &pci->dev;
+	const struct resource *res_acp;
+	struct acp_chip_info *chip;
+	struct resource *res;
+	unsigned int flag, addr, num_res, i;
+	int ret;
+
+	flag = snd_amd_acp_find_config(pci);
+	if (flag != FLAG_AMD_LEGACY)
+		return -ENODEV;
+
+	chip = devm_kzalloc(&pci->dev, sizeof(*chip), GFP_KERNEL);
+	if (!chip)
+		return -ENOMEM;
+
+	if (pci_enable_device(pci)) {
+		dev_err(&pci->dev, "pci_enable_device failed\n");
+		return -ENODEV;
+	}
+
+	ret = pci_request_regions(pci, "AMD ACP3x audio");
+	if (ret < 0) {
+		dev_err(&pci->dev, "pci_request_regions failed\n");
+		return -ENOMEM;
+	}
+
+	pci_set_master(pci);
+
+	switch (pci->revision) {
+	case 0x01:
+		res_acp = acp3x_res;
+		num_res = ARRAY_SIZE(acp3x_res);
+		chip->name = "acp_asoc_renoir";
+		chip->acp_rev = ACP3X_DEV;
+		break;
+	default:
+		dev_err(dev, "Unsupported device revision:0x%x\n", pci->revision);
+		return -EINVAL;
+	}
+
+	dmic_dev = platform_device_register_data(dev, "dmic-codec", PLATFORM_DEVID_NONE, NULL, 0);
+	if (IS_ERR(dmic_dev)) {
+		dev_err(dev, "failed to create DMIC device\n");
+		return PTR_ERR(dmic_dev);
+	}
+
+	addr = pci_resource_start(pci, 0);
+	chip->base = devm_ioremap(&pci->dev, addr, pci_resource_len(pci, 0));
+
+	res = devm_kzalloc(&pci->dev, sizeof(struct resource) * num_res, GFP_KERNEL);
+	if (!res)
+		return -ENOMEM;
+
+	for (i = 0; i < num_res; i++, res_acp++) {
+		res[i].name = res_acp->name;
+		res[i].flags = res_acp->flags;
+		res[i].start = addr + res_acp->start;
+		res[i].end = addr + res_acp->end;
+		if (res_acp->flags == IORESOURCE_IRQ) {
+			res[i].start = pci->irq;
+			res[i].end = res[i].start;
+		}
+	}
+
+	memset(&pdevinfo, 0, sizeof(pdevinfo));
+
+	pdevinfo.name = chip->name;
+	pdevinfo.id = 0;
+	pdevinfo.parent = &pci->dev;
+	pdevinfo.num_res = num_res;
+	pdevinfo.res = &res[0];
+	pdevinfo.data = chip;
+	pdevinfo.size_data = sizeof(*chip);
+
+	pdev = platform_device_register_full(&pdevinfo);
+	if (IS_ERR(pdev)) {
+		dev_err(&pci->dev, "cannot register %s device\n", pdevinfo.name);
+		platform_device_unregister(dmic_dev);
+		ret = PTR_ERR(pdev);
+	}
+
+	return ret;
+};
+
+static void acp_pci_remove(struct pci_dev *pci)
+{
+	if (dmic_dev)
+		platform_device_unregister(dmic_dev);
+	if (pdev)
+		platform_device_unregister(pdev);
+}
+
+/* PCI IDs */
+static const struct pci_device_id acp_pci_ids[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, ACP_PCI_DEV_ID)},
+	{ 0, }
+};
+MODULE_DEVICE_TABLE(pci, acp_pci_ids);
+
+/* pci_driver definition */
+static struct pci_driver snd_amd_acp_pci_driver = {
+	.name = KBUILD_MODNAME,
+	.id_table = acp_pci_ids,
+	.probe = acp_pci_probe,
+	.remove = acp_pci_remove,
+};
+module_pci_driver(snd_amd_acp_pci_driver);
+
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_ALIAS(DRV_NAME);
diff --git a/sound/soc/amd/acp/amd.h b/sound/soc/amd/acp/amd.h
index 567355209a5c..8fd38bf4d3bd 100644
--- a/sound/soc/amd/acp/amd.h
+++ b/sound/soc/amd/acp/amd.h
@@ -12,9 +12,14 @@
 #define __AMD_ACP_H
 
 #include <sound/pcm.h>
+#include <sound/soc.h>
 #include <sound/soc-acpi.h>
+#include <sound/soc-dai.h>
+
 #include "chip_offset_byte.h"
 
+#define ACP3X_DEV			3
+
 #define I2S_SP_INSTANCE			0x00
 #define I2S_BT_INSTANCE			0x01
 #define DMIC_INSTANCE			0x02
@@ -70,6 +75,12 @@
 
 #define ACP_MAX_STREAM			6
 
+struct acp_chip_info {
+	char *name;		/* Platform name */
+	unsigned int acp_rev;	/* ACP Revision id */
+	void __iomem *base;	/* ACP memory PCI base */
+};
+
 struct acp_stream {
 	struct snd_pcm_substream *substream;
 	int irq_bit;
@@ -106,6 +117,9 @@ int acp_platform_unregister(struct device *dev);
 
 int acp_machine_select(struct acp_dev_data *adata);
 
+/* Machine configuration */
+int snd_amd_acp_find_config(struct pci_dev *pci);
+
 static inline u64 acp_get_byte_count(struct acp_dev_data *adata, int dai_id, int direction)
 {
 	u64 byte_count, low = 0, high = 0;
diff --git a/sound/soc/amd/mach-config.h b/sound/soc/amd/mach-config.h
index feb3756d9ac4..0a54567a2841 100644
--- a/sound/soc/amd/mach-config.h
+++ b/sound/soc/amd/mach-config.h
@@ -14,6 +14,7 @@
 
 #define FLAG_AMD_SOF			BIT(1)
 #define FLAG_AMD_SOF_ONLY_DMIC		BIT(2)
+#define FLAG_AMD_LEGACY			BIT(3)
 
 #define ACP_PCI_DEV_ID			0x15E2
 
-- 
2.25.1

Re: [PATCH 3/6] ASoC: amd: acp: Add generic PCI driver module for ACP device

[Pierre-Louis Bossart]

> +static int acp_pci_probe(struct pci_dev *pci, const struct pci_device_id *pci_id)
> +{
> +	struct platform_device_info pdevinfo;
> +	struct device *dev = &pci->dev;
> +	const struct resource *res_acp;
> +	struct acp_chip_info *chip;
> +	struct resource *res;
> +	unsigned int flag, addr, num_res, i;
> +	int ret;
> +
> +	flag = snd_amd_acp_find_config(pci);
> +	if (flag != FLAG_AMD_LEGACY)
> +		return -ENODEV;
> +
> +	chip = devm_kzalloc(&pci->dev, sizeof(*chip), GFP_KERNEL);
> +	if (!chip)
> +		return -ENOMEM;
> +
> +	if (pci_enable_device(pci)) {
> +		dev_err(&pci->dev, "pci_enable_device failed\n");
> +		return -ENODEV;
> +	}
> +
> +	ret = pci_request_regions(pci, "AMD ACP3x audio");
> +	if (ret < 0) {
> +		dev_err(&pci->dev, "pci_request_regions failed\n");
> +		return -ENOMEM;
> +	}
> +
> +	pci_set_master(pci);
> +
> +	switch (pci->revision) {
> +	case 0x01:
> +		res_acp = acp3x_res;
> +		num_res = ARRAY_SIZE(acp3x_res);
> +		chip->name = "acp_asoc_renoir";
> +		chip->acp_rev = ACP3X_DEV;
> +		break;
> +	default:
> +		dev_err(dev, "Unsupported device revision:0x%x\n", pci->revision);
> +		return -EINVAL;
> +	}
> +
> +	dmic_dev = platform_device_register_data(dev, "dmic-codec", PLATFORM_DEVID_NONE, NULL, 0);
> +	if (IS_ERR(dmic_dev)) {
> +		dev_err(dev, "failed to create DMIC device\n");
> +		return PTR_ERR(dmic_dev);
> +	}

Past this point, any error handling needs to use
platform_device_unregister(dmic_dev);
...

> +	addr = pci_resource_start(pci, 0);
> +	chip->base = devm_ioremap(&pci->dev, addr, pci_resource_len(pci, 0));
> +
> +	res = devm_kzalloc(&pci->dev, sizeof(struct resource) * num_res, GFP_KERNEL);
> +	if (!res)
> +		return -ENOMEM;

...which is missed here.

> +
> +	for (i = 0; i < num_res; i++, res_acp++) {
> +		res[i].name = res_acp->name;
> +		res[i].flags = res_acp->flags;
> +		res[i].start = addr + res_acp->start;
> +		res[i].end = addr + res_acp->end;
> +		if (res_acp->flags == IORESOURCE_IRQ) {
> +			res[i].start = pci->irq;
> +			res[i].end = res[i].start;
> +		}
> +	}
> +
> +	memset(&pdevinfo, 0, sizeof(pdevinfo));
> +
> +	pdevinfo.name = chip->name;
> +	pdevinfo.id = 0;
> +	pdevinfo.parent = &pci->dev;
> +	pdevinfo.num_res = num_res;
> +	pdevinfo.res = &res[0];
> +	pdevinfo.data = chip;
> +	pdevinfo.size_data = sizeof(*chip);
> +
> +	pdev = platform_device_register_full(&pdevinfo);
> +	if (IS_ERR(pdev)) {
> +		dev_err(&pci->dev, "cannot register %s device\n", pdevinfo.name);
> +		platform_device_unregister(dmic_dev);
> +		ret = PTR_ERR(pdev);
> +	}
> +
> +	return ret;
> +};

Re: [PATCH 3/6] ASoC: amd: acp: Add generic PCI driver module for ACP device

[Ajit Kumar Pandey]

On 1/13/2022 8:57 PM, Pierre-Louis Bossart wrote:
> [CAUTION: External Email]
> 
>> +static int acp_pci_probe(struct pci_dev *pci, const struct pci_device_id *pci_id)
>> +{
>> +     struct platform_device_info pdevinfo;
>> +     struct device *dev = &pci->dev;
>> +     const struct resource *res_acp;
>> +     struct acp_chip_info *chip;
>> +     struct resource *res;
>> +     unsigned int flag, addr, num_res, i;
>> +     int ret;
>> +
>> +     flag = snd_amd_acp_find_config(pci);
>> +     if (flag != FLAG_AMD_LEGACY)
>> +             return -ENODEV;
>> +
>> +     chip = devm_kzalloc(&pci->dev, sizeof(*chip), GFP_KERNEL);
>> +     if (!chip)
>> +             return -ENOMEM;
>> +
>> +     if (pci_enable_device(pci)) {
>> +             dev_err(&pci->dev, "pci_enable_device failed\n");
>> +             return -ENODEV;
>> +     }
>> +
>> +     ret = pci_request_regions(pci, "AMD ACP3x audio");
>> +     if (ret < 0) {
>> +             dev_err(&pci->dev, "pci_request_regions failed\n");
>> +             return -ENOMEM;
>> +     }
>> +
>> +     pci_set_master(pci);
>> +
>> +     switch (pci->revision) {
>> +     case 0x01:
>> +             res_acp = acp3x_res;
>> +             num_res = ARRAY_SIZE(acp3x_res);
>> +             chip->name = "acp_asoc_renoir";
>> +             chip->acp_rev = ACP3X_DEV;
>> +             break;
>> +     default:
>> +             dev_err(dev, "Unsupported device revision:0x%x\n", pci->revision);
>> +             return -EINVAL;
>> +     }
>> +
>> +     dmic_dev = platform_device_register_data(dev, "dmic-codec", PLATFORM_DEVID_NONE, NULL, 0);
>> +     if (IS_ERR(dmic_dev)) {
>> +             dev_err(dev, "failed to create DMIC device\n");
>> +             return PTR_ERR(dmic_dev);
>> +     }
> 
> Past this point, any error handling needs to use
> platform_device_unregister(dmic_dev);
> ...
> 
>> +     addr = pci_resource_start(pci, 0);
>> +     chip->base = devm_ioremap(&pci->dev, addr, pci_resource_len(pci, 0));
>> +
>> +     res = devm_kzalloc(&pci->dev, sizeof(struct resource) * num_res, GFP_KERNEL);
>> +     if (!res)
>> +             return -ENOMEM;
> 
> ...which is missed here.
Thanks .. will fix this in v1 patch chain
> 
>> +
>> +     for (i = 0; i < num_res; i++, res_acp++) {
>> +             res[i].name = res_acp->name;
>> +             res[i].flags = res_acp->flags;
>> +             res[i].start = addr + res_acp->start;
>> +             res[i].end = addr + res_acp->end;
>> +             if (res_acp->flags == IORESOURCE_IRQ) {
>> +                     res[i].start = pci->irq;
>> +                     res[i].end = res[i].start;
>> +             }
>> +     }
>> +
>> +     memset(&pdevinfo, 0, sizeof(pdevinfo));
>> +
>> +     pdevinfo.name = chip->name;
>> +     pdevinfo.id = 0;
>> +     pdevinfo.parent = &pci->dev;
>> +     pdevinfo.num_res = num_res;
>> +     pdevinfo.res = &res[0];
>> +     pdevinfo.data = chip;
>> +     pdevinfo.size_data = sizeof(*chip);
>> +
>> +     pdev = platform_device_register_full(&pdevinfo);
>> +     if (IS_ERR(pdev)) {
>> +             dev_err(&pci->dev, "cannot register %s device\n", pdevinfo.name);
>> +             platform_device_unregister(dmic_dev);
>> +             ret = PTR_ERR(pdev);
>> +     }
>> +
>> +     return ret;
>> +};
> 

[PATCH 4/6] ASoC: amd: acp: Add ACP init()/deinit() callback for Renoir.

[Ajit Kumar Pandey]

ACP hardware has PGFSM control registers that can be configured to
power On/Off the ACP IP block. Add acp init()/de_init() callbacks
in renoir platform driver probe()/remove() respectively to power
on and off ACP IP block on ACP3X device.

Signed-off-by: Ajit Kumar Pandey <AjitKumar.Pandey@amd.com>
---
 sound/soc/amd/acp/acp-renoir.c       | 170 +++++++++++++++++++++++++++
 sound/soc/amd/acp/chip_offset_byte.h |   6 +
 2 files changed, 176 insertions(+)

diff --git a/sound/soc/amd/acp/acp-renoir.c b/sound/soc/amd/acp/acp-renoir.c
index 770a57a0677b..a29f910f25d1 100644
--- a/sound/soc/amd/acp/acp-renoir.c
+++ b/sound/soc/amd/acp/acp-renoir.c
@@ -25,6 +25,19 @@
 
 #define DRV_NAME "acp_asoc_renoir"
 
+#define ACP_SOFT_RST_DONE_MASK	0x00010001
+
+#define ACP_PWR_ON_MASK		0x01
+#define ACP_PWR_OFF_MASK	0x00
+#define ACP_PGFSM_STAT_MASK	0x03
+#define ACP_POWERED_ON		0x00
+#define ACP_PWR_ON_IN_PROGRESS	0x01
+#define ACP_POWERED_OFF		0x02
+
+
+#define ACP_ERROR_MASK 0x20000000
+#define ACP_EXT_INTR_STAT_CLEAR_MASK 0xFFFFFFFF
+
 static struct snd_soc_acpi_codecs amp_rt1019 = {
 	.num_codecs = 1,
 	.codecs = {"10EC1019"}
@@ -112,11 +125,154 @@ static struct snd_soc_dai_driver acp_renoir_dai[] = {
 },
 };
 
+static int acp3x_power_on(void __iomem *base)
+{
+	u32 val;
+	int timeout = 0;
+
+	val = readl(base + ACP_PGFSM_STATUS);
+
+	if (val == ACP_POWERED_ON)
+		return 0;
+
+	if ((val & ACP_PGFSM_STAT_MASK) != ACP_PWR_ON_IN_PROGRESS)
+		writel(ACP_PWR_ON_MASK, base + ACP_PGFSM_CONTROL);
+
+	while (++timeout < 500) {
+		val = readl(base + ACP_PGFSM_STATUS);
+		if (!val)
+			return 0;
+		udelay(1);
+	}
+
+	return -ETIMEDOUT;
+}
+
+static int acp3x_power_off(void __iomem *base)
+{
+	u32 val;
+	int timeout = 0;
+
+	writel(ACP_PWR_OFF_MASK, base + ACP_PGFSM_CONTROL);
+
+	while (++timeout < 500) {
+		val = readl(base + ACP_PGFSM_STATUS);
+		if ((val & ACP_PGFSM_STAT_MASK) == ACP_POWERED_OFF)
+			return 0;
+		udelay(1);
+	}
+
+	return -ETIMEDOUT;
+}
+
+static int acp3x_reset(void __iomem *base)
+{
+	u32 val;
+	int timeout = 0;
+
+	writel(1, base + ACP_SOFT_RESET);
+
+	while (++timeout < 500) {
+		val = readl(base + ACP_SOFT_RESET);
+		if (val & ACP_SOFT_RST_DONE_MASK)
+			break;
+		cpu_relax();
+	}
+
+	writel(0, base + ACP_SOFT_RESET);
+
+	timeout = 0;
+	while (++timeout < 500) {
+		val = readl(base + ACP_SOFT_RESET);
+		if (!val)
+			return 0;
+		cpu_relax();
+	}
+
+	return -ETIMEDOUT;
+}
+
+static void acp3x_enable_interrupts(void __iomem *base)
+{
+	u32 ext_intr_ctrl;
+
+	writel(0x01, base + ACP_EXTERNAL_INTR_ENB);
+	ext_intr_ctrl = readl(base + ACP_EXTERNAL_INTR_CNTL);
+	ext_intr_ctrl |= ACP_ERROR_MASK;
+	writel(ext_intr_ctrl, base + ACP_EXTERNAL_INTR_CNTL);
+}
+
+static void acp3x_disable_interrupts(void __iomem *base)
+{
+	writel(ACP_EXT_INTR_STAT_CLEAR_MASK, base + ACP_EXTERNAL_INTR_STAT);
+	writel(0x00, base + ACP_EXTERNAL_INTR_ENB);
+}
+
+static int rn_acp_init(void __iomem *base)
+{
+	int ret;
+
+	/* power on */
+	ret = acp3x_power_on(base);
+	if (ret)
+		return ret;
+
+	writel(0x01, base + ACP_CONTROL);
+
+	/* Reset */
+	ret = acp3x_reset(base);
+	if (ret)
+		return ret;
+
+	acp3x_enable_interrupts(base);
+
+	return 0;
+}
+
+static int rn_acp_deinit(void __iomem *base)
+{
+	int ret = 0;
+
+	acp3x_disable_interrupts(base);
+
+	/* Reset */
+	ret = acp3x_reset(base);
+	if (ret)
+		return ret;
+
+	writel(0x00, base + ACP_CONTROL);
+
+	/* power off */
+	ret = acp3x_power_off(base);
+	if (ret)
+		return ret;
+
+	return 0;
+}
 static int renoir_audio_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
+	struct acp_chip_info *chip;
 	struct acp_dev_data *adata;
 	struct resource *res;
+	int ret;
+
+	chip = dev_get_platdata(&pdev->dev);
+	if (!chip || !chip->base) {
+		dev_err(&pdev->dev, "ACP chip data is NULL\n");
+		return -ENODEV;
+	}
+
+	if (chip->acp_rev != ACP3X_DEV) {
+		dev_err(&pdev->dev, "Un-supported ACP Revision %d\n", chip->acp_rev);
+		return -ENODEV;
+	}
+
+	ret = rn_acp_init(chip->base);
+	if (ret) {
+		dev_err(&pdev->dev, "ACP Init failed\n");
+		return -EINVAL;
+	}
 
 	adata = devm_kzalloc(dev, sizeof(struct acp_dev_data), GFP_KERNEL);
 	if (!adata)
@@ -155,6 +311,20 @@ static int renoir_audio_probe(struct platform_device *pdev)
 static int renoir_audio_remove(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
+	struct acp_chip_info *chip;
+	int ret;
+
+	chip = dev_get_platdata(&pdev->dev);
+	if (!chip || !chip->base) {
+		dev_err(&pdev->dev, "ACP chip data is NULL\n");
+		return -ENODEV;
+	}
+
+	ret = rn_acp_deinit(chip->base);
+	if (ret) {
+		dev_err(&pdev->dev, "ACP de-init Failed\n");
+		return -EINVAL;
+	}
 
 	acp_platform_unregister(dev);
 	return 0;
diff --git a/sound/soc/amd/acp/chip_offset_byte.h b/sound/soc/amd/acp/chip_offset_byte.h
index e38589a142e9..88f6fa597cd6 100644
--- a/sound/soc/amd/acp/chip_offset_byte.h
+++ b/sound/soc/amd/acp/chip_offset_byte.h
@@ -14,6 +14,12 @@
 #define ACPAXI2AXI_ATU_CTRL                           0xC40
 #define ACPAXI2AXI_ATU_PAGE_SIZE_GRP_5                0xC20
 #define ACPAXI2AXI_ATU_BASE_ADDR_GRP_5                0xC24
+
+#define ACP_PGFSM_CONTROL			0x141C
+#define ACP_PGFSM_STATUS                        0x1420
+#define ACP_SOFT_RESET                          0x1000
+#define ACP_CONTROL                             0x1004
+
 #define ACP_EXTERNAL_INTR_ENB                         0x1800
 #define ACP_EXTERNAL_INTR_CNTL                        0x1804
 #define ACP_EXTERNAL_INTR_STAT                        0x1808
-- 
2.25.1

[PATCH 5/6] ASoC: amd: acp: acp-legacy: Add DMIC dai link support for Renoir

[Ajit Kumar Pandey]

Add DMIC related dai link for pdm-dmic dai on Renoir platform with
generic dmic codec dai.

Signed-off-by: Ajit Kumar Pandey <AjitKumar.Pandey@amd.com>
---
 sound/soc/amd/acp/acp-legacy-mach.c |  4 ++--
 sound/soc/amd/acp/acp-mach-common.c | 15 +++++++++++++++
 2 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/sound/soc/amd/acp/acp-legacy-mach.c b/sound/soc/amd/acp/acp-legacy-mach.c
index 0ad1cf41b308..91140d15691b 100644
--- a/sound/soc/amd/acp/acp-legacy-mach.c
+++ b/sound/soc/amd/acp/acp-legacy-mach.c
@@ -23,10 +23,10 @@
 static struct acp_card_drvdata rt5682_rt1019_data = {
 	.hs_cpu_id = I2S_SP,
 	.amp_cpu_id = I2S_SP,
-	.dmic_cpu_id = NONE,
+	.dmic_cpu_id = DMIC,
 	.hs_codec_id = RT5682,
 	.amp_codec_id = RT1019,
-	.dmic_codec_id = NONE,
+	.dmic_codec_id = DMIC,
 	.gpio_spkr_en = EN_SPKR_GPIO_GB,
 };
 
diff --git a/sound/soc/amd/acp/acp-mach-common.c b/sound/soc/amd/acp/acp-mach-common.c
index c9caade5cb74..b163e3a68166 100644
--- a/sound/soc/amd/acp/acp-mach-common.c
+++ b/sound/soc/amd/acp/acp-mach-common.c
@@ -438,6 +438,8 @@ SND_SOC_DAILINK_DEF(sof_sp,
 	DAILINK_COMP_ARRAY(COMP_CPU("acp-sof-sp")));
 SND_SOC_DAILINK_DEF(sof_dmic,
 	DAILINK_COMP_ARRAY(COMP_CPU("acp-sof-dmic")));
+SND_SOC_DAILINK_DEF(pdm_dmic,
+	DAILINK_COMP_ARRAY(COMP_CPU("acp-pdm-dmic")));
 
 int acp_sofdsp_dai_links_create(struct snd_soc_card *card)
 {
@@ -613,6 +615,19 @@ int acp_legacy_dai_links_create(struct snd_soc_card *card)
 			links[i].ops = &acp_card_maxim_ops;
 			links[i].init = acp_card_maxim_init;
 		}
+		i++;
+	}
+
+	if (drv_data->dmic_cpu_id == DMIC) {
+		links[i].name = "acp-dmic-codec";
+		links[i].id = DMIC_BE_ID;
+		links[i].codecs = dmic_codec;
+		links[i].num_codecs = ARRAY_SIZE(dmic_codec);
+		links[i].cpus = pdm_dmic;
+		links[i].num_cpus = ARRAY_SIZE(pdm_dmic);
+		links[i].platforms = platform_component;
+		links[i].num_platforms = ARRAY_SIZE(platform_component);
+		links[i].dpcm_capture = 1;
 	}
 
 	card->dai_link = links;
-- 
2.25.1

[PATCH 6/6] ASoC: amd: renoir: Add check for acp configuration flags.

[Ajit Kumar Pandey]

We have SOF and generic ACP support enabled for Renoir platforms
on some machines. Since we have same PCI id used for probing, add
check for machine configuration flag to avoid conflict with newer
pci drivers. Such machine flag has been initialized via dmi match
on few Chrome machines. If no flag is specified probe and register
older platform device.

Signed-off-by: Ajit Kumar Pandey <AjitKumar.Pandey@amd.com>
---
 sound/soc/amd/renoir/rn-pci-acp3x.c | 7 ++++++-
 sound/soc/amd/renoir/rn_acp3x.h     | 3 +++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/sound/soc/amd/renoir/rn-pci-acp3x.c b/sound/soc/amd/renoir/rn-pci-acp3x.c
index 7b8040e812a1..b3812b70f5f9 100644
--- a/sound/soc/amd/renoir/rn-pci-acp3x.c
+++ b/sound/soc/amd/renoir/rn-pci-acp3x.c
@@ -212,10 +212,15 @@ static int snd_rn_acp_probe(struct pci_dev *pci,
 	acpi_integer dmic_status;
 #endif
 	const struct dmi_system_id *dmi_id;
-	unsigned int irqflags;
+	unsigned int irqflags, flag;
 	int ret, index;
 	u32 addr;
 
+	/* Return if acp config flag is defined */
+	flag = snd_amd_acp_find_config(pci);
+	if (flag)
+		return -ENODEV;
+
 	/* Renoir device check */
 	if (pci->revision != 0x01)
 		return -ENODEV;
diff --git a/sound/soc/amd/renoir/rn_acp3x.h b/sound/soc/amd/renoir/rn_acp3x.h
index 14620399d766..ca586603d720 100644
--- a/sound/soc/amd/renoir/rn_acp3x.h
+++ b/sound/soc/amd/renoir/rn_acp3x.h
@@ -88,3 +88,6 @@ static inline void rn_writel(u32 val, void __iomem *base_addr)
 {
 	writel(val, base_addr - ACP_PHY_BASE_ADDRESS);
 }
+
+/* Machine configuration */
+int snd_amd_acp_find_config(struct pci_dev *pci);
-- 
2.25.1