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ASoC: amd: add logic to check dmic hardware runtime 

Add logic to check DMIC hardware exists or not on
the platform at runtime.

Add module param for overriding DMIC hardware check
at runtime.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Link: https://lore.kernel.org/r/1593710826-1106-1-git-send-email-Vijendar.Mukunda@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Vijendar Mukunda 2020-07-02 22:56:52 +05:30 committed by Mark Brown
parent 59b44649a8
commit 9e0d21e121
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 31 additions and 0 deletions
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29
sound/soc/amd/renoir/rn-pci-acp3x.c
View File

@ -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);

2
sound/soc/amd/renoir/rn_acp3x.h
View File

@ -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;