047b9cbbaa
The hda_component contains information shared from the amp drivers to the codec that can be altered (for example as the driver unloads). Guard the update and use of these to prevent use of stale data. Signed-off-by: Simon Trimmer <simont@opensource.cirrus.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Link: https://lore.kernel.org/20240617154105.108635-5-simont@opensource.cirrus.com
104 lines
3.0 KiB
C
104 lines
3.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* HD audio Component Binding Interface
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*
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* Copyright (C) 2021 Cirrus Logic, Inc. and
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* Cirrus Logic International Semiconductor Ltd.
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*/
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#ifndef __HDA_COMPONENT_H__
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#define __HDA_COMPONENT_H__
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#include <linux/acpi.h>
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#include <linux/component.h>
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#include <linux/mutex.h>
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#include <sound/hda_codec.h>
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#define HDA_MAX_COMPONENTS 4
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#define HDA_MAX_NAME_SIZE 50
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struct hda_component {
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struct device *dev;
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char name[HDA_MAX_NAME_SIZE];
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struct acpi_device *adev;
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bool acpi_notifications_supported;
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void (*acpi_notify)(acpi_handle handle, u32 event, struct device *dev);
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void (*pre_playback_hook)(struct device *dev, int action);
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void (*playback_hook)(struct device *dev, int action);
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void (*post_playback_hook)(struct device *dev, int action);
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};
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struct hda_component_parent {
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struct mutex mutex;
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struct hda_codec *codec;
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struct hda_component comps[HDA_MAX_COMPONENTS];
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};
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#ifdef CONFIG_ACPI
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void hda_component_acpi_device_notify(struct hda_component_parent *parent,
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acpi_handle handle, u32 event, void *data);
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int hda_component_manager_bind_acpi_notifications(struct hda_codec *cdc,
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struct hda_component_parent *parent,
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acpi_notify_handler handler, void *data);
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void hda_component_manager_unbind_acpi_notifications(struct hda_codec *cdc,
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struct hda_component_parent *parent,
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acpi_notify_handler handler);
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#else
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static inline void hda_component_acpi_device_notify(struct hda_component_parent *parent,
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acpi_handle handle,
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u32 event,
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void *data)
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{
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}
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static inline int hda_component_manager_bind_acpi_notifications(struct hda_codec *cdc,
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struct hda_component_parent *parent,
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acpi_notify_handler handler,
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void *data)
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{
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return 0;
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}
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static inline void hda_component_manager_unbind_acpi_notifications(struct hda_codec *cdc,
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struct hda_component_parent *parent,
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acpi_notify_handler handler)
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{
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}
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#endif /* ifdef CONFIG_ACPI */
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void hda_component_manager_playback_hook(struct hda_component_parent *parent, int action);
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int hda_component_manager_init(struct hda_codec *cdc,
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struct hda_component_parent *parent, int count,
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const char *bus, const char *hid,
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const char *match_str,
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const struct component_master_ops *ops);
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void hda_component_manager_free(struct hda_codec *cdc,
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const struct component_master_ops *ops);
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int hda_component_manager_bind(struct hda_codec *cdc, struct hda_component_parent *parent);
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static inline struct hda_component *hda_component_from_index(struct hda_component_parent *parent,
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int index)
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{
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if (!parent)
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return NULL;
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if (index < 0 || index >= ARRAY_SIZE(parent->comps))
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return NULL;
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return &parent->comps[index];
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}
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static inline void hda_component_manager_unbind(struct hda_codec *cdc,
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struct hda_component_parent *parent)
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{
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mutex_lock(&parent->mutex);
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component_unbind_all(hda_codec_dev(cdc), parent);
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mutex_unlock(&parent->mutex);
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}
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#endif /* ifndef __HDA_COMPONENT_H__ */
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