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[3/6,SRU,M] ALSA: hda: cs35l41: Add notification support into component binding

Message ID 20231121122833.11493-4-chris.chiu@canonical.com
State New
Headers show
Series Support speaker mute hotkey for Cirrus CS35L41 HDA codec | expand

Commit Message

Chris Chiu Nov. 21, 2023, 12:28 p.m. UTC 
From: Stefan Binding <sbinding@opensource.cirrus.com>

BugLink: https://bugs.launchpad.net/bugs/2039151

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>
(cherry picked from commit 502629a75566b5cb409c118125d38102e5edc8f6)
Signed-off-by: Chris Chiu <chris.chiu@canonical.com>
---
 sound/pci/hda/hda_component.h | 4 ++++
 1 file changed, 4 insertions(+)
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Patch

diff --git a/sound/pci/hda/hda_component.h b/sound/pci/hda/hda_component.h
index f170aec967c1..bbd6f0ed16c1 100644
--- 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);