82d9d54a6c
For distributions, we need one place where we can decide which driver will be activated for the auto-configation of the Intel's HDA hardware with DSP. Actually, we cover three drivers: * Legacy HDA * Intel SST * Intel Sound Open Firmware (SOF) All those drivers registers similar PCI IDs, so the first driver probed from the PCI stack can win. But... it is not guaranteed that the correct driver wins. This commit changes Intel's NHLT ACPI module to a common DSP probe module for the Intel's hardware. All above sound drivers calls this code. The user can force another behaviour using the module parameter 'dsp_driver' located in the 'snd-intel-dspcfg' module. This change allows to add specific dmi checks for the specific systems. The examples are taken from the pull request: https://github.com/thesofproject/linux/pull/927 Tested on Lenovo Carbon X1 7th gen. Signed-off-by: Jaroslav Kysela <perex@perex.cz> Tested-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Link: https://lore.kernel.org/r/20191022174313.29087-1-perex@perex.cz Signed-off-by: Takashi Iwai <tiwai@suse.de>
105 lines
2.5 KiB
C
105 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright (c) 2015-2019 Intel Corporation
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#include <linux/acpi.h>
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#include <sound/intel-nhlt.h>
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#define NHLT_ACPI_HEADER_SIG "NHLT"
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/* Unique identification for getting NHLT blobs */
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static guid_t osc_guid =
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GUID_INIT(0xA69F886E, 0x6CEB, 0x4594,
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0xA4, 0x1F, 0x7B, 0x5D, 0xCE, 0x24, 0xC5, 0x53);
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struct nhlt_acpi_table *intel_nhlt_init(struct device *dev)
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{
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acpi_handle handle;
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union acpi_object *obj;
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struct nhlt_resource_desc *nhlt_ptr;
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struct nhlt_acpi_table *nhlt_table = NULL;
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handle = ACPI_HANDLE(dev);
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if (!handle) {
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dev_err(dev, "Didn't find ACPI_HANDLE\n");
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return NULL;
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}
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obj = acpi_evaluate_dsm(handle, &osc_guid, 1, 1, NULL);
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if (!obj)
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return NULL;
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if (obj->type != ACPI_TYPE_BUFFER) {
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dev_dbg(dev, "No NHLT table found\n");
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ACPI_FREE(obj);
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return NULL;
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}
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nhlt_ptr = (struct nhlt_resource_desc *)obj->buffer.pointer;
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if (nhlt_ptr->length)
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nhlt_table = (struct nhlt_acpi_table *)
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memremap(nhlt_ptr->min_addr, nhlt_ptr->length,
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MEMREMAP_WB);
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ACPI_FREE(obj);
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if (nhlt_table &&
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(strncmp(nhlt_table->header.signature,
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NHLT_ACPI_HEADER_SIG,
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strlen(NHLT_ACPI_HEADER_SIG)) != 0)) {
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memunmap(nhlt_table);
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dev_err(dev, "NHLT ACPI header signature incorrect\n");
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return NULL;
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}
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return nhlt_table;
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}
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EXPORT_SYMBOL_GPL(intel_nhlt_init);
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void intel_nhlt_free(struct nhlt_acpi_table *nhlt)
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{
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memunmap((void *)nhlt);
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}
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EXPORT_SYMBOL_GPL(intel_nhlt_free);
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int intel_nhlt_get_dmic_geo(struct device *dev, struct nhlt_acpi_table *nhlt)
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{
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struct nhlt_endpoint *epnt;
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struct nhlt_dmic_array_config *cfg;
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struct nhlt_vendor_dmic_array_config *cfg_vendor;
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unsigned int dmic_geo = 0;
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u8 j;
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if (!nhlt)
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return 0;
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epnt = (struct nhlt_endpoint *)nhlt->desc;
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for (j = 0; j < nhlt->endpoint_count; j++) {
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if (epnt->linktype == NHLT_LINK_DMIC) {
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cfg = (struct nhlt_dmic_array_config *)
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(epnt->config.caps);
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switch (cfg->array_type) {
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case NHLT_MIC_ARRAY_2CH_SMALL:
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case NHLT_MIC_ARRAY_2CH_BIG:
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dmic_geo = MIC_ARRAY_2CH;
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break;
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case NHLT_MIC_ARRAY_4CH_1ST_GEOM:
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case NHLT_MIC_ARRAY_4CH_L_SHAPED:
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case NHLT_MIC_ARRAY_4CH_2ND_GEOM:
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dmic_geo = MIC_ARRAY_4CH;
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break;
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case NHLT_MIC_ARRAY_VENDOR_DEFINED:
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cfg_vendor = (struct nhlt_vendor_dmic_array_config *)cfg;
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dmic_geo = cfg_vendor->nb_mics;
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break;
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default:
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dev_warn(dev, "undefined DMIC array_type 0x%0x\n",
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cfg->array_type);
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}
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}
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epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
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}
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return dmic_geo;
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}
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EXPORT_SYMBOL_GPL(intel_nhlt_get_dmic_geo);
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