linux-kernel - [PATCH v2 07/11] ALSA: hda: hda_component: Add pre and post playback hooks to hda

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 21 Jul 2023 16:18:12 +0100
From:   Stefan Binding <sbinding@...nsource.cirrus.com>
To:     Mark Brown <broonie@...nel.org>, Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>
CC:     <alsa-devel@...a-project.org>, <linux-kernel@...r.kernel.org>,
        <patches@...nsource.cirrus.com>,
        Stefan Binding <sbinding@...nsource.cirrus.com>
Subject: [PATCH v2 07/11] 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@...nsource.cirrus.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 534e845b9cd1d..f170aec967c18 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 52ea7d757d6ad..a6585afb77071 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -6716,9 +6716,17 @@ 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