From 7ce669334c55c50ecc2909c42275a3eec0039799 Mon Sep 17 00:00:00 2001 From: Stefan Binding Date: Thu, 21 Sep 2023 17:28:47 +0100 Subject: ALSA: hda/realtek: Support ACPI Notification framework via component binding For systems which have support for ACPI notifications, add a mechanism to register a handler for ACPI notifications and then call the acpi_notify api on the bound components. Registering a handler in the Realtek HDA driver, allows a single handler to be registered, which then calls into all the components, rather than attempting to register the same handler multiple times, once for each component. Signed-off-by: Stefan Binding Link: https://lore.kernel.org/r/20230921162849.1988124-3-sbinding@opensource.cirrus.com Signed-off-by: Takashi Iwai --- sound/pci/hda/patch_realtek.c | 83 ++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 82 insertions(+), 1 deletion(-) (limited to 'sound/pci/hda/patch_realtek.c') diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c index 883a7e865bc5..1e2b6a299dbc 100644 --- a/sound/pci/hda/patch_realtek.c +++ b/sound/pci/hda/patch_realtek.c @@ -10,6 +10,7 @@ * Jonathan Woithe */ +#include #include #include #include @@ -6704,12 +6705,91 @@ static void alc287_fixup_legion_15imhg05_speakers(struct hda_codec *codec, } } +#ifdef CONFIG_ACPI +static void comp_acpi_device_notify(acpi_handle handle, u32 event, void *data) +{ + struct hda_codec *cdc = data; + struct alc_spec *spec = cdc->spec; + int i; + + codec_info(cdc, "ACPI Notification %d\n", event); + + for (i = 0; i < HDA_MAX_COMPONENTS; i++) { + if (spec->comps[i].dev && spec->comps[i].acpi_notify) + spec->comps[i].acpi_notify(acpi_device_handle(spec->comps[i].adev), event, + spec->comps[i].dev); + } +} + +static int comp_bind_acpi(struct device *dev) +{ + struct hda_codec *cdc = dev_to_hda_codec(dev); + struct alc_spec *spec = cdc->spec; + bool support_notifications = false; + struct acpi_device *adev; + int ret; + int i; + + adev = spec->comps[0].adev; + if (!acpi_device_handle(adev)) + return 0; + + for (i = 0; i < HDA_MAX_COMPONENTS; i++) + support_notifications = support_notifications || + spec->comps[i].acpi_notifications_supported; + + if (support_notifications) { + ret = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY, + comp_acpi_device_notify, cdc); + 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; +} + +static void comp_unbind_acpi(struct device *dev) +{ + struct hda_codec *cdc = dev_to_hda_codec(dev); + struct alc_spec *spec = cdc->spec; + struct acpi_device *adev; + int ret; + + adev = spec->comps[0].adev; + if (!acpi_device_handle(adev)) + return; + + ret = acpi_remove_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY, + comp_acpi_device_notify); + if (ret < 0) + codec_warn(cdc, "Failed to uninstall notify handler: %d\n", ret); +} +#else +static int comp_bind_acpi(struct device *dev) +{ + return 0; +} + +static void comp_unbind_acpi(struct device *dev) +{ +} +#endif + static int comp_bind(struct device *dev) { struct hda_codec *cdc = dev_to_hda_codec(dev); struct alc_spec *spec = cdc->spec; + int ret; + + ret = component_bind_all(dev, spec->comps); + if (ret) + return ret; - return component_bind_all(dev, spec->comps); + return comp_bind_acpi(dev); } static void comp_unbind(struct device *dev) @@ -6717,6 +6797,7 @@ static void comp_unbind(struct device *dev) struct hda_codec *cdc = dev_to_hda_codec(dev); struct alc_spec *spec = cdc->spec; + comp_unbind_acpi(dev); component_unbind_all(dev, spec->comps); } -- cgit v1.2.3