From: Maciej Strozek <mstrozek@opensource.cirrus.com>
Date: Wed, 2 Apr 2025 14:48:35 +0000 (+0100)
Subject: sof-soundwire: cs42l43: Switch mixer based on output volume
X-Git-Tag: v1.2.14~7
X-Git-Url: https://git.alsa-project.org/?a=commitdiff_plain;h=ff1184ae23002be8aa00da6a5b586db50f37dd9d;p=alsa-ucm-conf.git

sof-soundwire: cs42l43: Switch mixer based on output volume

Hardware volume control in cs42l43 can go up to +31.5dB which can
cause audio degradation. For best results, limit hardware volume to 0dB.

The application may request >0dB mixer volume controls using
'@OutMix>0dB' variable passed to snd_use_case_mgr_open().

Closes: https://github.com/alsa-project/alsa-ucm-conf/pull/540
Link: https://gitlab.freedesktop.org/pipewire/pipewire/-/issues/4622
Signed-off-by: Maciej Strozek <mstrozek@opensource.cirrus.com>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
---

diff --git a/ucm2/codecs/cs42l43/init.conf b/ucm2/codecs/cs42l43/init.conf
index c0fa863..7fa9cf1 100644
--- a/ucm2/codecs/cs42l43/init.conf
+++ b/ucm2/codecs/cs42l43/init.conf
@@ -8,5 +8,19 @@ LibraryConfig.remap.Config {
 		"name='cs42l43 Headset Microphone Capture Volume'" {
 			"name='cs42l43 Decimator 1 Volume'".vindex.0 0
 		}
+		"name='cs42l43 Speaker Playback Switch'" {
+			"name='cs42l43 Speaker Digital Switch'".vindex.0 0
+			"name='cs42l43 Speaker Digital Switch'".vindex.1 1
+		}
+	}
+}
+
+If.0 {
+	Condition {
+		Type String
+		Empty "${var:-@OutMix>0dB}"
 	}
+	True.BootSequence [
+		cset "name='cs42l43 Speaker Digital Volume' 128"
+	]
 }
diff --git a/ucm2/sof-soundwire/cs42l43-spk.conf b/ucm2/sof-soundwire/cs42l43-spk.conf
index 693c450..48efa51 100644
--- a/ucm2/sof-soundwire/cs42l43-spk.conf
+++ b/ucm2/sof-soundwire/cs42l43-spk.conf
@@ -17,9 +17,23 @@ SectionDevice."Speaker" {
 		cset "name='cs42l43 Speaker R Input 1' 'None'"
 	]
 
+
+	If.0 {
+		Condition {
+			Type String
+			Empty "${var:-@OutMix>0dB}"
+		}
+		True.Value {
+			PlaybackMixer "default:${CardId}"
+			PlaybackMixerElem "cs42l43 Speaker"
+		}
+		False.Value {
+			PlaybackMixerElem "cs42l43 Speaker Digital"
+		}
+	}
+
 	Value {
 		PlaybackPriority 100
 		PlaybackPCM "hw:${CardId},2"
-		PlaybackMixerElem "cs42l43 Speaker Digital"
 	}
 }