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https://github.com/brain-hackers/linux-brain.git
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303681f435
Move parts of the code outside of the Skylake driver to help detect the presence of DMICs (which are not supported by the HDaudio legacy driver). No functionality change (except for the removal of useless OR operations), only indentation and checkpatch fixes, making sure that the code compiles without ACPI and fixing an ACPI leak Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
104 lines
2.4 KiB
C
104 lines
2.4 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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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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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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MODULE_LICENSE("GPL v2");
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MODULE_DESCRIPTION("Intel NHLT driver");
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