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@xxxxxxx>
---
v3: changed dmic_acpi_check module param as bint
v2: changed module param usage -1 as default, 0 - skip, 1 - force
sound/soc/amd/renoir/rn-pci-acp3x.c | 29 +++++++++++++++++++++++++++++
sound/soc/amd/renoir/rn_acp3x.h | 2 ++
2 files changed, 31 insertions(+)
diff --git a/sound/soc/amd/renoir/rn-pci-acp3x.c b/sound/soc/amd/renoir/rn-pci-acp3x.c
index 859ed67..d1faea5 100644
--- a/sound/soc/amd/renoir/rn-pci-acp3x.c
+++ b/sound/soc/amd/renoir/rn-pci-acp3x.c
@@ -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);
diff --git a/sound/soc/amd/renoir/rn_acp3x.h b/sound/soc/amd/renoir/rn_acp3x.h
index 75228e3..1462039 100644
--- a/sound/soc/amd/renoir/rn_acp3x.h
+++ b/sound/soc/amd/renoir/rn_acp3x.h
@@ -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;
--
2.7.4
