NHLT fetch based on _DSM prevents ACPI table override mechanism from being utilized. Make use of acpi_get_table to enable it and get rid of redundant code.
Signed-off-by: Cezary Rojewski cezary.rojewski@intel.com --- sound/hda/intel-nhlt.c | 49 +++++++----------------------------------- 1 file changed, 8 insertions(+), 41 deletions(-)
diff --git a/sound/hda/intel-nhlt.c b/sound/hda/intel-nhlt.c index 99a23fe7fab9..2f741d2792d8 100644 --- a/sound/hda/intel-nhlt.c +++ b/sound/hda/intel-nhlt.c @@ -4,58 +4,25 @@ #include <linux/acpi.h> #include <sound/intel-nhlt.h>
-#define NHLT_ACPI_HEADER_SIG "NHLT" - -/* Unique identification for getting NHLT blobs */ -static const guid_t osc_guid = - GUID_INIT(0xA69F886E, 0x6CEB, 0x4594, - 0xA4, 0x1F, 0x7B, 0x5D, 0xCE, 0x24, 0xC5, 0x53); - struct nhlt_acpi_table *intel_nhlt_init(struct device *dev) { - acpi_handle handle; - union acpi_object *obj; - struct nhlt_resource_desc *nhlt_ptr; - struct nhlt_acpi_table *nhlt_table = NULL; - - handle = ACPI_HANDLE(dev); - if (!handle) { - dev_err(dev, "Didn't find ACPI_HANDLE\n"); - return NULL; - } + struct nhlt_acpi_table *nhlt; + acpi_status status;
- obj = acpi_evaluate_dsm(handle, &osc_guid, 1, 1, NULL); - - if (!obj) - return NULL; - - if (obj->type != ACPI_TYPE_BUFFER) { - dev_dbg(dev, "No NHLT table found\n"); - ACPI_FREE(obj); + status = acpi_get_table(ACPI_SIG_NHLT, 0, + (struct acpi_table_header **)&nhlt); + if (ACPI_FAILURE(status)) { + dev_warn(dev, "NHLT table not found\n"); return NULL; }
- nhlt_ptr = (struct nhlt_resource_desc *)obj->buffer.pointer; - if (nhlt_ptr->length) - nhlt_table = (struct nhlt_acpi_table *) - memremap(nhlt_ptr->min_addr, nhlt_ptr->length, - MEMREMAP_WB); - ACPI_FREE(obj); - if (nhlt_table && - (strncmp(nhlt_table->header.signature, - NHLT_ACPI_HEADER_SIG, - strlen(NHLT_ACPI_HEADER_SIG)) != 0)) { - memunmap(nhlt_table); - dev_err(dev, "NHLT ACPI header signature incorrect\n"); - return NULL; - } - return nhlt_table; + return nhlt; } EXPORT_SYMBOL_GPL(intel_nhlt_init);
void intel_nhlt_free(struct nhlt_acpi_table *nhlt) { - memunmap((void *)nhlt); + acpi_put_table((struct acpi_table_header *)nhlt); } EXPORT_SYMBOL_GPL(intel_nhlt_free);