The patch below does not apply to the 5.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 0e853a9c3937caa9f13fdde547d6202f92457c2b Mon Sep 17 00:00:00 2001
From: Stefan Binding sbinding@opensource.cirrus.com Date: Mon, 26 Apr 2021 17:37:48 +0100 Subject: [PATCH] ALSA: hda/cirrus: Set Initial DMIC volume for Bullseye to -26 dB
After booting for first time on Bullseye, the DMIC is currently muted. Instead, the DMIC volume should be set to a valid initial value.
Tested on DELL Inspiron-3505, DELL Inspiron-3501, DELL Inspiron-3500
Signed-off-by: Stefan Binding sbinding@opensource.cirrus.com Signed-off-by: Vitaly Rodionov vitalyr@opensource.cirrus.com BugLink: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1923557 Reported-and-tested-by: You-Sheng Yang vicamo.yang@canonical.com Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20210426163749.196153-2-vitalyr@opensource.cirrus.... Signed-off-by: Takashi Iwai tiwai@suse.de
diff --git a/sound/pci/hda/patch_cirrus.c b/sound/pci/hda/patch_cirrus.c index 5d57096b3a95..a4f82f147ff3 100644 --- a/sound/pci/hda/patch_cirrus.c +++ b/sound/pci/hda/patch_cirrus.c @@ -2172,6 +2172,11 @@ static void cs8409_cs42l42_fixups(struct hda_codec *codec, (get_wcaps(codec, CS8409_CS42L42_AMIC_PIN_NID) | AC_WCAP_UNSOL_CAP)); break; case HDA_FIXUP_ACT_PROBE: + + /* Set initial volume on Bullseye to -26 dB */ + if (codec->fixup_id == CS8409_BULLSEYE) + snd_hda_codec_amp_init_stereo(codec, CS8409_CS42L42_DMIC_ADC_PIN_NID, + HDA_INPUT, 0, 0xff, 0x19); snd_hda_gen_add_kctl(&spec->gen, NULL, &cs8409_cs42l42_hp_volume_mixer); snd_hda_gen_add_kctl(&spec->gen,