From patchwork Wed Aug 12 08:28:51 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kai-Heng Feng X-Patchwork-Id: 1343566 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=lists.ubuntu.com (client-ip=91.189.94.19; helo=huckleberry.canonical.com; envelope-from=kernel-team-bounces@lists.ubuntu.com; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=canonical.com Received: from huckleberry.canonical.com (huckleberry.canonical.com [91.189.94.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 4BRNCL256Kz9sTb; Wed, 12 Aug 2020 18:29:02 +1000 (AEST) Received: from localhost ([127.0.0.1] helo=huckleberry.canonical.com) by huckleberry.canonical.com with esmtp (Exim 4.86_2) (envelope-from ) id 1k5m83-00033U-9m; Wed, 12 Aug 2020 08:28:59 +0000 Received: from youngberry.canonical.com ([91.189.89.112]) by huckleberry.canonical.com with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.86_2) (envelope-from ) id 1k5m82-00033C-8Q for kernel-team@lists.ubuntu.com; Wed, 12 Aug 2020 08:28:58 +0000 Received: from 61-220-137-37.hinet-ip.hinet.net ([61.220.137.37] helo=localhost) by youngberry.canonical.com with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.86_2) (envelope-from ) id 1k5m81-0001im-Ip for kernel-team@lists.ubuntu.com; Wed, 12 Aug 2020 08:28:58 +0000 From: Kai-Heng Feng To: kernel-team@lists.ubuntu.com Subject: [PATCH 1/1] ALSA: usb-audio: Disable Lenovo P620 Rear line-in volume control Date: Wed, 12 Aug 2020 16:28:51 +0800 Message-Id: <20200812082851.14274-2-kai.heng.feng@canonical.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200812082851.14274-1-kai.heng.feng@canonical.com> References: <20200812082851.14274-1-kai.heng.feng@canonical.com> X-BeenThere: kernel-team@lists.ubuntu.com X-Mailman-Version: 2.1.20 Precedence: list List-Id: Kernel team discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: kernel-team-bounces@lists.ubuntu.com Sender: "kernel-team" BugLink: https://bugs.launchpad.net/bugs/1891281 The USB device (0x17aa:0x1046) that support Lenovo P620 rear panel line-in claim to support volume control, but it doens't seem to have an AMP, so when line-in volume lowers below 80, nothing gets recorded anymore. Disable the volume control to workaround the issue. Fixes: f8c11eb7da4a ("ALSA: usb-audio: Add support for Lenovo ThinkStation P620") Signed-off-by: Kai-Heng Feng Link: https://lore.kernel.org/r/20200810133108.31580-1-kai.heng.feng@canonical.com Signed-off-by: Takashi Iwai (cherry picked from commit 34dedd2a83b241ba6aeb290260313c65dc58660e linux-next) Signed-off-by: Kai-Heng Feng Acked-by: Stefan Bader --- sound/usb/mixer_maps.c | 1 + 1 file changed, 1 insertion(+) diff --git a/sound/usb/mixer_maps.c b/sound/usb/mixer_maps.c index 08eb230e2bff..7e7afd71b356 100644 --- a/sound/usb/mixer_maps.c +++ b/sound/usb/mixer_maps.c @@ -371,6 +371,7 @@ static const struct usbmix_name_map asus_rog_map[] = { }; static const struct usbmix_name_map lenovo_p620_rear_map[] = { + { 19, NULL, 2 }, /* FU, Volume */ { 19, NULL, 12 }, /* FU, Input Gain Pad */ {} };