From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- sound/soc/soc-acpi.c | 129 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 129 insertions(+) create mode 100644 sound/soc/soc-acpi.c (limited to 'sound/soc/soc-acpi.c') diff --git a/sound/soc/soc-acpi.c b/sound/soc/soc-acpi.c new file mode 100644 index 000000000..142476f13 --- /dev/null +++ b/sound/soc/soc-acpi.c @@ -0,0 +1,129 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// soc-apci.c - support for ACPI enumeration. +// +// Copyright (c) 2013-15, Intel Corporation. + +#include +#include +#include + +static bool snd_soc_acpi_id_present(struct snd_soc_acpi_mach *machine) +{ + const struct snd_soc_acpi_codecs *comp_ids = machine->comp_ids; + int i; + + if (machine->id[0]) { + if (acpi_dev_present(machine->id, NULL, -1)) + return true; + } + + if (comp_ids) { + for (i = 0; i < comp_ids->num_codecs; i++) { + if (acpi_dev_present(comp_ids->codecs[i], NULL, -1)) { + strscpy(machine->id, comp_ids->codecs[i], ACPI_ID_LEN); + return true; + } + } + } + + return false; +} + +struct snd_soc_acpi_mach * +snd_soc_acpi_find_machine(struct snd_soc_acpi_mach *machines) +{ + struct snd_soc_acpi_mach *mach; + struct snd_soc_acpi_mach *mach_alt; + + for (mach = machines; mach->id[0] || mach->comp_ids; mach++) { + if (snd_soc_acpi_id_present(mach)) { + if (mach->machine_quirk) { + mach_alt = mach->machine_quirk(mach); + if (!mach_alt) + continue; /* not full match, ignore */ + mach = mach_alt; + } + + return mach; + } + } + return NULL; +} +EXPORT_SYMBOL_GPL(snd_soc_acpi_find_machine); + +static acpi_status snd_soc_acpi_find_package(acpi_handle handle, u32 level, + void *context, void **ret) +{ + struct acpi_device *adev = acpi_fetch_acpi_dev(handle); + acpi_status status; + struct snd_soc_acpi_package_context *pkg_ctx = context; + + pkg_ctx->data_valid = false; + + if (adev && 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 snd_soc_acpi_find_package_from_hid(const u8 hid[ACPI_ID_LEN], + struct snd_soc_acpi_package_context *ctx) +{ + acpi_status status; + + status = acpi_get_devices(hid, snd_soc_acpi_find_package, ctx, NULL); + + if (ACPI_FAILURE(status) || !ctx->data_valid) + return false; + + return true; +} +EXPORT_SYMBOL_GPL(snd_soc_acpi_find_package_from_hid); + +struct snd_soc_acpi_mach *snd_soc_acpi_codec_list(void *arg) +{ + struct snd_soc_acpi_mach *mach = arg; + struct snd_soc_acpi_codecs *codec_list = + (struct snd_soc_acpi_codecs *) mach->quirk_data; + int i; + + if (mach->quirk_data == NULL) + return mach; + + for (i = 0; i < codec_list->num_codecs; i++) { + if (!acpi_dev_present(codec_list->codecs[i], NULL, -1)) + return NULL; + } + + return mach; +} +EXPORT_SYMBOL_GPL(snd_soc_acpi_codec_list); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("ALSA SoC ACPI module"); -- cgit v1.2.3