ASoC: amd: add logic to check dmic hardware runtime (9e0d21e1) · Commits · 戴 / test

sound/soc/amd/renoir/rn-pci-acp3x.c

+29 −0

Original line number	Diff line number	Diff line
		@@ -5,6 +5,7 @@
		//Copyright 2020 Advanced Micro Devices, Inc.

		#include <linux/pci.h>
		#include <linux/acpi.h>
		#include <linux/module.h>
		#include <linux/io.h>
		#include <linux/delay.h>
		@@ -18,6 +19,16 @@ static int acp_power_gating;
		module_param(acp_power_gating, int, 0644);
		MODULE_PARM_DESC(acp_power_gating, "Enable acp power gating");

		/**
		* dmic_acpi_check = -1 - Checks ACPI method to know DMIC hardware status runtime
		* = 0 - Skips the DMIC device creation and returns probe failure
		* = 1 - Assumes that platform has DMIC support and skips ACPI
		* method check
		*/
		static int dmic_acpi_check = ACP_DMIC_AUTO;
		module_param(dmic_acpi_check, bint, 0644);
		MODULE_PARM_DESC(dmic_acpi_check, "checks Dmic hardware runtime");

		struct acp_dev_data {
		void __iomem *acp_base;
		struct resource *res;
		@@ -157,6 +168,8 @@ static int snd_rn_acp_probe(struct pci_dev *pci,
		{
		struct acp_dev_data *adata;
		struct platform_device_info pdevinfo[ACP_DEVS];
		acpi_handle handle;
		acpi_integer dmic_status;
		unsigned int irqflags;
		int ret, index;
		u32 addr;
		@@ -201,6 +214,22 @@ static int snd_rn_acp_probe(struct pci_dev *pci,
		if (ret)
		goto disable_msi;

		if (!dmic_acpi_check) {
		ret = -ENODEV;
		goto de_init;
		} else if (dmic_acpi_check == ACP_DMIC_AUTO) {
		handle = ACPI_HANDLE(&pci->dev);
		ret = acpi_evaluate_integer(handle, "_WOV", NULL, &dmic_status);
		if (ACPI_FAILURE(ret)) {
		ret = -EINVAL;
		goto de_init;
		}
		if (!dmic_status) {
		ret = -ENODEV;
		goto de_init;
		}
		}

		adata->res = devm_kzalloc(&pci->dev,
		sizeof(struct resource) * 2,
		GFP_KERNEL);

sound/soc/amd/renoir/rn_acp3x.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -55,6 +55,8 @@

		#define MAX_BUFFER (CAPTURE_MAX_PERIOD_SIZE * CAPTURE_MAX_NUM_PERIODS)
		#define MIN_BUFFER MAX_BUFFER
		#define ACP_DMIC_AUTO -1

		struct pdm_dev_data {
		u32 pdm_irq;
		void __iomem *acp_base;

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