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Diffstat (limited to 'sound/soc/intel/common/sst-match-acpi.c')
-rw-r--r--sound/soc/intel/common/sst-match-acpi.c57
1 files changed, 57 insertions, 0 deletions
diff --git a/sound/soc/intel/common/sst-match-acpi.c b/sound/soc/intel/common/sst-match-acpi.c
index 789843307a49..1070f3ad23e5 100644
--- a/sound/soc/intel/common/sst-match-acpi.c
+++ b/sound/soc/intel/common/sst-match-acpi.c
@@ -77,5 +77,62 @@ struct sst_acpi_mach *sst_acpi_find_machine(struct sst_acpi_mach *machines)
}
EXPORT_SYMBOL_GPL(sst_acpi_find_machine);
+static acpi_status sst_acpi_find_package(acpi_handle handle, u32 level,
+ void *context, void **ret)
+{
+ struct acpi_device *adev;
+ acpi_status status = AE_OK;
+ struct sst_acpi_package_context *pkg_ctx = context;
+
+ pkg_ctx->data_valid = false;
+
+ if (acpi_bus_get_device(handle, &adev))
+ return AE_OK;
+
+ if (adev->status.present && adev->status.functional) {
+ struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
+ union acpi_object *myobj = NULL;
+
+ status = acpi_evaluate_object_typed(handle, pkg_ctx->name,
+ NULL, &buffer,
+ ACPI_TYPE_PACKAGE);
+ if (ACPI_FAILURE(status))
+ return AE_OK;
+
+ myobj = buffer.pointer;
+ if (!myobj || myobj->package.count != pkg_ctx->length) {
+ kfree(buffer.pointer);
+ return AE_OK;
+ }
+
+ status = acpi_extract_package(myobj,
+ pkg_ctx->format, pkg_ctx->state);
+ if (ACPI_FAILURE(status)) {
+ kfree(buffer.pointer);
+ return AE_OK;
+ }
+
+ kfree(buffer.pointer);
+ pkg_ctx->data_valid = true;
+ return AE_CTRL_TERMINATE;
+ }
+
+ return AE_OK;
+}
+
+bool sst_acpi_find_package_from_hid(const u8 hid[ACPI_ID_LEN],
+ struct sst_acpi_package_context *ctx)
+{
+ acpi_status status;
+
+ status = acpi_get_devices(hid, sst_acpi_find_package, ctx, NULL);
+
+ if (ACPI_FAILURE(status) || !ctx->data_valid)
+ return false;
+
+ return true;
+}
+EXPORT_SYMBOL_GPL(sst_acpi_find_package_from_hid);
+
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Intel Common ACPI Match module");