source: GPL/trunk/alsa-kernel/pci/hda/hda_component2.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * HD audio Component Binding Interface
 *
 * Copyright (C) 2021 Cirrus Logic, Inc. and
 *                    Cirrus Logic International Semiconductor Ltd.
 */

#ifndef __HDA_COMPONENT_H__
#define __HDA_COMPONENT_H__

#include <linux/acpi.h>
#include <linux/component.h>
#include <linux/mutex.h>
#include <sound/hda_codec.h>

#define HDA_MAX_COMPONENTS      4
#define HDA_MAX_NAME_SIZE       50

struct hda_component {
        struct device *dev;
        char name[HDA_MAX_NAME_SIZE];
        struct acpi_device *adev;
        bool acpi_notifications_supported;
//      void (*acpi_notify)(acpi_handle handle, u32 event, struct device *dev);
        void (*pre_playback_hook)(struct device *dev, int action);
        void (*playback_hook)(struct device *dev, int action);
        void (*post_playback_hook)(struct device *dev, int action);
};

struct hda_component_parent {
        struct mutex mutex;
        struct hda_codec *codec;
        struct hda_component comps[HDA_MAX_COMPONENTS];
};

#ifdef CONFIG_ACPI
void hda_component_acpi_device_notify(struct hda_component_parent *parent,
                                      acpi_handle handle, u32 event, void *data);
int hda_component_manager_bind_acpi_notifications(struct hda_codec *cdc,
                                                  struct hda_component_parent *parent,
                                                  acpi_notify_handler handler, void *data);
void hda_component_manager_unbind_acpi_notifications(struct hda_codec *cdc,
                                                     struct hda_component_parent *parent,
                                                     acpi_notify_handler handler);
#else
static inline void hda_component_acpi_device_notify(struct hda_component_parent *parent,
                                                    acpi_handle handle,
                                                    u32 event,
                                                    void *data)
{
}

static inline int hda_component_manager_bind_acpi_notifications(struct hda_codec *cdc,
                                                                struct hda_component_parent *parent,
                                                                acpi_notify_handler handler,
                                                                void *data)

{
        return 0;
}

static inline void hda_component_manager_unbind_acpi_notifications(struct hda_codec *cdc,
                                                                   struct hda_component_parent *parent,
                                                                   acpi_notify_handler handler)
{
}
#endif /* ifdef CONFIG_ACPI */

void hda_component_manager_playback_hook(struct hda_component_parent *parent, int action);

int hda_component_manager_init(struct hda_codec *cdc,
                               struct hda_component_parent *parent, int count,
                               const char *bus, const char *hid,
                               const char *match_str,
                               const struct component_master_ops *ops);

void hda_component_manager_free(struct hda_component_parent *parent,
                                const struct component_master_ops *ops);

int hda_component_manager_bind(struct hda_codec *cdc, struct hda_component_parent *parent);

static inline struct hda_component *hda_component_from_index(struct hda_component_parent *parent,
                                                             int index)
{
        if (!parent)
                return NULL;

        if (index < 0 || index >= ARRAY_SIZE(parent->comps))
                return NULL;

        return &parent->comps[index];
}

static inline void hda_component_manager_unbind(struct hda_codec *cdc,
                                                struct hda_component_parent *parent)
{
        mutex_lock(&parent->mutex);
        component_unbind_all(hda_codec_dev(cdc), parent);
        mutex_unlock(&parent->mutex);
}

#endif /* ifndef __HDA_COMPONENT_H__ */