From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5D15746D0A1; Tue, 21 Jul 2026 17:37:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784655471; cv=none; b=HYgcBELuqtcvxt7m4VbwZ533L7IJz/5D8tYh9P3DBMJO+74YQZSB6uVpE7VIDoOneoBnsb2B2G8Mt81zq4f/otVss0vKwGTHY+vhsxOizbdCTZe9idUFfnu+L/+ZN8BKv4eRxID7cZAAk+oGPX1rsM8QvsHXtv5cCkkNFKBRI0s= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784655471; c=relaxed/simple; bh=ePaurNtlTx3o85tZK3cxgnMYo6J8NifZhJGOW29xU1o=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=nfihJQu7aJthW1YlyPNAHq8ijXsPdgE3Yr86BKEK0NjXA2oYEhHiqUFo3Wd2f+tiWSRTLXJZVgoBSS6Ati4aj/4UrXLLDp2xZWbf7rADUPrLY5V+x7UOGNb0rBLQ1e1wv3GNJlAF5zuBxX9JGge67+dm+OuWaA3mmu/UFpdiIRI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=VGH8EQZW; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="VGH8EQZW" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BB2C21F000E9; Tue, 21 Jul 2026 17:37:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784655470; bh=za+SZzklFTCOcW/ooLymU1+/tX7ImGduAZ7KjsMc3yg=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=VGH8EQZWTe0VzBV+0spcK3vNOxUtosrOUq38FD5KBKSvOiaR5gBQv4q9gmIrR0Mi5 0gUmMpG3b4ysw2e6Rj2sPZYC4+uQZxZBjgDyxa1rL77a3DjqdxT9CiHYEFsIL44x4e vjHRIeNmctdx8y3JyKzuDfQNM1yzFLR2o+gGeXKU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Zhang Heng , Takashi Iwai Subject: [PATCH 6.18 0022/1611] ALSA: hda: conexant: Remove mic bias threshold override Date: Tue, 21 Jul 2026 17:02:18 +0200 Message-ID: <20260721152515.299402533@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260721152514.750365251@linuxfoundation.org> References: <20260721152514.750365251@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Zhang Heng commit f52524da7084c1a54683ae9fbc73e93fff19dd64 upstream. Remove the mic bias current comparator threshold override (NID 0x1c, verb 0x320, value 0x010) from Conexant codec driver. This override was originally intended to support volume up/down controls on headsets with inline remote controls, but it causes microphone detection failures on some headsets with impedance less than 1k ohm. After consulting with the vendor's engineers, it was confirmed that this setting is board-specific and should be handled by BIOS/firmware rather than the generic codec driver, especially since inline remote support is not currently implemented. Fixes: 7aeb25908648 ("ALSA: hda/conexant: Fix headset auto detect fail in cx8070 and SN6140") Cc: stable@vger.kernel.org Signed-off-by: Zhang Heng Link: https://patch.msgid.link/20260713100329.306892-1-zhangheng@kylinos.cn Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman --- sound/hda/codecs/conexant.c | 3 --- 1 file changed, 3 deletions(-) --- a/sound/hda/codecs/conexant.c +++ b/sound/hda/codecs/conexant.c @@ -168,9 +168,6 @@ static void cx_fixup_headset_recog(struc { unsigned int mic_present; - /* fix some headset type recognize fail issue, such as EDIFIER headset */ - /* set micbias output current comparator threshold from 66% to 55%. */ - snd_hda_codec_write(codec, 0x1c, 0, 0x320, 0x010); /* set OFF voltage for DFET from -1.2V to -0.8V, set headset micbias register * value adjustment trim from 2.2K ohms to 2.0K ohms. */