ALSA: hda: cs35l41: Add notification support into component binding

Some systems support a notification from ACPI, which can be used
for different things.

Only one handler can be registered for the acpi notification, but all
amps need to receive that notification, we can register a single handler
inside the component master, so that it can then notify through the
component framework.

This is required to support mute notifications from ACPI.

Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230921162849.1988124-2-sbinding@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/hda/hda_component.h b/sound/pci/hda/hda_component.h
index f170aec967c18ce349fd5bb72a85349d199fd14f..bbd6f0ed16c13d09aac393059b84dd9419893979 100644 (file)
--- a/sound/pci/hda/hda_component.h
+++ b/sound/pci/hda/hda_component.h
@@ -6,6 +6,7 @@
  *                    Cirrus Logic International Semiconductor Ltd.
  */
 
+#include <linux/acpi.h>
 #include <linux/component.h>
 
 #define HDA_MAX_COMPONENTS     4
@@ -15,6 +16,9 @@ struct hda_component {
        struct device *dev;
        char name[HDA_MAX_NAME_SIZE];
        struct hda_codec *codec;
+       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);