ALSA: hda: hda_component: Add pre and post playback hooks to hda_component

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@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230721151816.2080453-8-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 534e845..f170aec 100644 (file)
--- 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 e2f8b60..7d14f9d 100644 (file)
--- 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 {