diff options
Diffstat (limited to 'sound/pci/hda/hda_component.c')
| -rw-r--r-- | sound/pci/hda/hda_component.c | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/sound/pci/hda/hda_component.c b/sound/pci/hda/hda_component.c new file mode 100644 index 000000000000..cd299d7d84ba --- /dev/null +++ b/sound/pci/hda/hda_component.c @@ -0,0 +1,169 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * HD audio Component Binding Interface + * + * Copyright (C) 2021, 2023 Cirrus Logic, Inc. and + * Cirrus Logic International Semiconductor Ltd. + */ + +#include <linux/acpi.h> +#include <linux/component.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <sound/hda_codec.h> +#include "hda_component.h" +#include "hda_local.h" + +#ifdef CONFIG_ACPI +void hda_component_acpi_device_notify(struct hda_component *comps, int num_comps, + acpi_handle handle, u32 event, void *data) +{ + int i; + + for (i = 0; i < num_comps; i++) { + if (comps[i].dev && comps[i].acpi_notify) + comps[i].acpi_notify(acpi_device_handle(comps[i].adev), event, + comps[i].dev); + } +} +EXPORT_SYMBOL_NS_GPL(hda_component_acpi_device_notify, SND_HDA_SCODEC_COMPONENT); + +int hda_component_manager_bind_acpi_notifications(struct hda_codec *cdc, + struct hda_component *comps, int num_comps, + acpi_notify_handler handler, void *data) +{ + bool support_notifications = false; + struct acpi_device *adev; + int ret; + int i; + + adev = comps[0].adev; + if (!acpi_device_handle(adev)) + return 0; + + for (i = 0; i < num_comps; i++) + support_notifications = support_notifications || + comps[i].acpi_notifications_supported; + + if (support_notifications) { + ret = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY, + handler, data); + if (ret < 0) { + codec_warn(cdc, "Failed to install notify handler: %d\n", ret); + return 0; + } + + codec_dbg(cdc, "Notify handler installed\n"); + } + + return 0; +} +EXPORT_SYMBOL_NS_GPL(hda_component_manager_bind_acpi_notifications, SND_HDA_SCODEC_COMPONENT); + +void hda_component_manager_unbind_acpi_notifications(struct hda_codec *cdc, + struct hda_component *comps, + acpi_notify_handler handler) +{ + struct acpi_device *adev; + int ret; + + adev = comps[0].adev; + if (!acpi_device_handle(adev)) + return; + + ret = acpi_remove_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY, handler); + if (ret < 0) + codec_warn(cdc, "Failed to uninstall notify handler: %d\n", ret); +} +EXPORT_SYMBOL_NS_GPL(hda_component_manager_unbind_acpi_notifications, SND_HDA_SCODEC_COMPONENT); +#endif /* ifdef CONFIG_ACPI */ + +void hda_component_manager_playback_hook(struct hda_component *comps, int num_comps, int action) +{ + int i; + + for (i = 0; i < num_comps; i++) { + if (comps[i].dev && comps[i].pre_playback_hook) + comps[i].pre_playback_hook(comps[i].dev, action); + } + for (i = 0; i < num_comps; i++) { + if (comps[i].dev && comps[i].playback_hook) + comps[i].playback_hook(comps[i].dev, action); + } + for (i = 0; i < num_comps; i++) { + if (comps[i].dev && comps[i].post_playback_hook) + comps[i].post_playback_hook(comps[i].dev, action); + } +} +EXPORT_SYMBOL_NS_GPL(hda_component_manager_playback_hook, SND_HDA_SCODEC_COMPONENT); + +struct hda_scodec_match { + const char *bus; + const char *hid; + const char *match_str; + int index; +}; + +/* match the device name in a slightly relaxed manner */ +static int hda_comp_match_dev_name(struct device *dev, void *data) +{ + struct hda_scodec_match *p = data; + const char *d = dev_name(dev); + int n = strlen(p->bus); + char tmp[32]; + + /* check the bus name */ + if (strncmp(d, p->bus, n)) + return 0; + /* skip the bus number */ + if (isdigit(d[n])) + n++; + /* the rest must be exact matching */ + snprintf(tmp, sizeof(tmp), p->match_str, p->hid, p->index); + return !strcmp(d + n, tmp); +} + +int hda_component_manager_init(struct hda_codec *cdc, + struct hda_component *comps, int count, + const char *bus, const char *hid, + const char *match_str, + const struct component_master_ops *ops) +{ + struct device *dev = hda_codec_dev(cdc); + struct component_match *match = NULL; + struct hda_scodec_match *sm; + int ret, i; + + for (i = 0; i < count; i++) { + sm = devm_kmalloc(dev, sizeof(*sm), GFP_KERNEL); + if (!sm) + return -ENOMEM; + + sm->bus = bus; + sm->hid = hid; + sm->match_str = match_str; + sm->index = i; + comps[i].codec = cdc; + component_match_add(dev, &match, hda_comp_match_dev_name, sm); + } + + ret = component_master_add_with_match(dev, ops, match); + if (ret) + codec_err(cdc, "Fail to register component aggregator %d\n", ret); + + return ret; +} +EXPORT_SYMBOL_NS_GPL(hda_component_manager_init, SND_HDA_SCODEC_COMPONENT); + +void hda_component_manager_free(struct hda_codec *cdc, + const struct component_master_ops *ops) +{ + struct device *dev = hda_codec_dev(cdc); + + component_master_del(dev, ops); +} +EXPORT_SYMBOL_NS_GPL(hda_component_manager_free, SND_HDA_SCODEC_COMPONENT); + +MODULE_DESCRIPTION("HD Audio component binding library"); +MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>"); +MODULE_LICENSE("GPL"); |