From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hans de Goede Subject: Cherry Trail + RT5645 devices analog microphone not working. Date: Sun, 24 Dec 2017 11:42:59 +0100 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: Received: from mail-wm0-f45.google.com (mail-wm0-f45.google.com [74.125.82.45]) by alsa0.perex.cz (Postfix) with ESMTP id 12CC726698E for ; Sun, 24 Dec 2017 11:43:01 +0100 (CET) Received: by mail-wm0-f45.google.com with SMTP id y82so30112472wmg.1 for ; Sun, 24 Dec 2017 02:43:01 -0800 (PST) Content-Language: en-US List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: Bard Liao Cc: alsa-devel@alsa-project.org, Pierre-Louis Bossart List-Id: alsa-devel@alsa-project.org Hi Bard, I've been looking into getting the microphone to work on some Cherry Trail + RT5645 devices with what appears to be a simple analog microphone. You can see the microphone on one of the models I'm trying to get it to work on soldered onto the right side of the PCB here: https://i.imgur.com/bJzBQWe.jpg I'm using this ucm config: https://fedorapeople.org/~jwrdegoede/chtrt5645/ Which is basically Pierre-Louis Bossart's config from: https://github.com/plbossart/UCM Adjusted because the devices all have a mono speaker. I've been trying to get this to work myself and I can get some sound while recording by adding: cset "name='RECMIXL BST2 Switch' on" cset "name='RECMIXR BST2 Switch' on" But then I mainly get noise, I do get some sound from the microphone if I talk really really loudly, but it is barely above the noise-floor. I've the feeling that BST2 is only picking up the microphone via cross-talk and that BST1 indeed is the correct input, but for some reason I get complete silence when recording when only BST1 is selected in the RECMIXR, and yes I've checked / set the "IN1 boost volume". TL;DR: I'm trying to get an analog mic to work on 3 different models Cherry Trail + RT5645 devices and I've been unable to get this to work. I've put a registerdump of the rt5645 with gnome-sound-recorder running here: https://fedorapeople.org/~jwrdegoede/rt5645-mic-red.dump Any insights / help with this would be very much welcome. Regards, Hans