[L/Unstable] [PATCH 12/16] ALSA: hda: hda_component: Add pre and post playback hooks to hda_component

[Kai-Heng Feng]

From: Stefan Binding <sbinding at opensource.cirrus.com>

BugLink: https://bugs.launchpad.net/bugs/2029199

These hooks can be used to add callbacks that would be run before and after
the main playback hooks. These hooks would be called for all amps, before
moving on to the next hook, i.e. pre_playback_hook would be called for
all amps, before the playback_hook is called for all amps, then finally
the post_playback_hook is called for all amps.

Signed-off-by: Stefan Binding <sbinding at opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230721151816.2080453-8-sbinding@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai at suse.de>
(cherry picked from commit 4eae4892c5bdef990b4b80997b813e2443d6554c linux-next)
Signed-off-by: Kai-Heng Feng <kai.heng.feng at canonical.com>
---
 sound/pci/hda/hda_component.h |  2 ++
 sound/pci/hda/patch_realtek.c | 10 +++++++++-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/sound/pci/hda/hda_component.h b/sound/pci/hda/hda_component.h
index 534e845b9cd1..f170aec967c1 100644
--- a/sound/pci/hda/hda_component.h
+++ b/sound/pci/hda/hda_component.h
@@ -15,5 +15,7 @@ struct hda_component {
 	struct device *dev;
 	char name[HDA_MAX_NAME_SIZE];
 	struct hda_codec *codec;
+	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);
 };
diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 37a01954e73c..cf4183a9a0ed 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -6700,9 +6700,17 @@ static void comp_generic_playback_hook(struct hda_pcm_stream *hinfo, struct hda_
 	int i;
 
 	for (i = 0; i < HDA_MAX_COMPONENTS; i++) {
-		if (spec->comps[i].dev)
+		if (spec->comps[i].dev && spec->comps[i].pre_playback_hook)
+			spec->comps[i].pre_playback_hook(spec->comps[i].dev, action);
+	}
+	for (i = 0; i < HDA_MAX_COMPONENTS; i++) {
+		if (spec->comps[i].dev && spec->comps[i].playback_hook)
 			spec->comps[i].playback_hook(spec->comps[i].dev, action);
 	}
+	for (i = 0; i < HDA_MAX_COMPONENTS; i++) {
+		if (spec->comps[i].dev && spec->comps[i].post_playback_hook)
+			spec->comps[i].post_playback_hook(spec->comps[i].dev, action);
+	}
 }
 
 struct cs35l41_dev_name {
-- 
2.34.1