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This file is implicitly relying on an instance of including module.h from <linux/acpi.h>. Ideally, header files under include/linux shouldn't be adding includes of other headers, in anticipation of their consumers, but just the headers needed for the header itself to pass parsing with CPP. The module.h is particularly bad in this sense, as it itself does include a whole bunch of other headers, due to the complexity of module support. Here, we make the include explicit, in order to allow the future removal of module.h from linux/acpi.h without causing build breakage. Cc: Liam Girdwood <lgirdwood@gmail.com> Cc: Mark Brown <broonie@kernel.org> Cc: Jaroslav Kysela <perex@perex.cz> Cc: Takashi Iwai <tiwai@suse.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Mark Brown <broonie@kernel.org>
111 lines
2.5 KiB
C
111 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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//
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// soc-apci.c - support for ACPI enumeration.
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//
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// Copyright (c) 2013-15, Intel Corporation.
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#include <linux/export.h>
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#include <linux/module.h>
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#include <sound/soc-acpi.h>
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struct snd_soc_acpi_mach *
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snd_soc_acpi_find_machine(struct snd_soc_acpi_mach *machines)
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{
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struct snd_soc_acpi_mach *mach;
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struct snd_soc_acpi_mach *mach_alt;
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for (mach = machines; mach->id[0]; mach++) {
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if (acpi_dev_present(mach->id, NULL, -1)) {
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if (mach->machine_quirk) {
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mach_alt = mach->machine_quirk(mach);
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if (!mach_alt)
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continue; /* not full match, ignore */
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mach = mach_alt;
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}
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return mach;
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}
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}
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return NULL;
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}
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EXPORT_SYMBOL_GPL(snd_soc_acpi_find_machine);
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static acpi_status snd_soc_acpi_find_package(acpi_handle handle, u32 level,
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void *context, void **ret)
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{
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struct acpi_device *adev;
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acpi_status status = AE_OK;
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struct snd_soc_acpi_package_context *pkg_ctx = context;
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pkg_ctx->data_valid = false;
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if (acpi_bus_get_device(handle, &adev))
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return AE_OK;
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if (adev->status.present && adev->status.functional) {
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struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
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union acpi_object *myobj = NULL;
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status = acpi_evaluate_object_typed(handle, pkg_ctx->name,
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NULL, &buffer,
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ACPI_TYPE_PACKAGE);
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if (ACPI_FAILURE(status))
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return AE_OK;
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myobj = buffer.pointer;
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if (!myobj || myobj->package.count != pkg_ctx->length) {
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kfree(buffer.pointer);
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return AE_OK;
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}
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status = acpi_extract_package(myobj,
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pkg_ctx->format, pkg_ctx->state);
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if (ACPI_FAILURE(status)) {
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kfree(buffer.pointer);
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return AE_OK;
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}
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kfree(buffer.pointer);
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pkg_ctx->data_valid = true;
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return AE_CTRL_TERMINATE;
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}
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return AE_OK;
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}
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bool snd_soc_acpi_find_package_from_hid(const u8 hid[ACPI_ID_LEN],
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struct snd_soc_acpi_package_context *ctx)
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{
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acpi_status status;
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status = acpi_get_devices(hid, snd_soc_acpi_find_package, ctx, NULL);
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if (ACPI_FAILURE(status) || !ctx->data_valid)
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return false;
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return true;
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}
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EXPORT_SYMBOL_GPL(snd_soc_acpi_find_package_from_hid);
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struct snd_soc_acpi_mach *snd_soc_acpi_codec_list(void *arg)
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{
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struct snd_soc_acpi_mach *mach = arg;
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struct snd_soc_acpi_codecs *codec_list =
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(struct snd_soc_acpi_codecs *) mach->quirk_data;
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int i;
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if (mach->quirk_data == NULL)
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return mach;
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for (i = 0; i < codec_list->num_codecs; i++) {
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if (!acpi_dev_present(codec_list->codecs[i], NULL, -1))
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return NULL;
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}
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return mach;
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}
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EXPORT_SYMBOL_GPL(snd_soc_acpi_codec_list);
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MODULE_LICENSE("GPL v2");
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MODULE_DESCRIPTION("ALSA SoC ACPI module");
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