From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D5504C4CECF for ; Mon, 23 Sep 2019 18:22:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A5C0D2168B for ; Mon, 23 Sep 2019 18:22:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569262926; bh=XXgV7GdpmgrRQlQQcHSeBjZLF84UP9XKc48/jnVV6SI=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=YCIXbTCctosUEa+NTSo1fO3NLUaVmkUFONJLMwJVV5zAfbsiLGICq47LdFbMkrZFM Mn4iGrpMDxrjnu16WZ6D/X+v60lR49534dtBiK45YhnznYGj9MmUvsn44aofZi3HvS j7syzUsdJwh7bZdZKiWiu73TXraf2B8Ar+i6u5HE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732954AbfIWSWG (ORCPT ); Mon, 23 Sep 2019 14:22:06 -0400 Received: from heliosphere.sirena.org.uk ([172.104.155.198]:41084 "EHLO heliosphere.sirena.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726655AbfIWSWG (ORCPT ); Mon, 23 Sep 2019 14:22:06 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sirena.org.uk; s=20170815-heliosphere; h=In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=XXgV7GdpmgrRQlQQcHSeBjZLF84UP9XKc48/jnVV6SI=; b=bu2aAu+YXPhQH48WDuTnDrOVX IghH+dZIbly1gCKvFJq7zLQCauDtFzTTy/xOxU4CrKWqmizv3So3IZdOwrE7aTNGmE6Dzr+yns/yJ lwrhdhjrhQOV0B8sOq5ogFWFKgAGUk23tzhA4ue9aLrhdv2cS4BW/FXnofBW34V1bu57M=; Received: from [12.157.10.114] (helo=fitzroy.sirena.org.uk) by heliosphere.sirena.org.uk with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1iCSyH-0004WT-Q4; Mon, 23 Sep 2019 18:22:02 +0000 Received: by fitzroy.sirena.org.uk (Postfix, from userid 1000) id A53DFD0218A; Mon, 23 Sep 2019 19:21:59 +0100 (BST) Date: Mon, 23 Sep 2019 11:21:59 -0700 From: Mark Brown To: Sasha Levin Cc: linux-kernel@vger.kernel.org, stable@vger.kernel.org, Jiaxin Yu Subject: Re: [PATCH AUTOSEL 5.3 087/203] ASoC: mediatek: mt6358: add delay after dmic clock on Message-ID: <20190923182159.GV2036@sirena.org.uk> References: <20190922184350.30563-1-sashal@kernel.org> <20190922184350.30563-87-sashal@kernel.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="GvlH2BAVfmx8aXCn" Content-Disposition: inline In-Reply-To: <20190922184350.30563-87-sashal@kernel.org> X-Cookie: Be careful! UGLY strikes 9 out of 10! User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --GvlH2BAVfmx8aXCn Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sun, Sep 22, 2019 at 02:41:53PM -0400, Sasha Levin wrote: > From: Jiaxin Yu >=20 > [ Upstream commit ccb1fa21ef58a2ac15519bb878470762e967e8b3 ] >=20 > Most dmics produce a high level when they receive clock. The difference > between power-on and memory record time is about 10ms, but the dmic > needs 50ms to output normal data. >=20 > This commit add 100ms delay after SoC output clock so that we can cut > off the pop noise at the beginning. This might mess up a production system, please don't backport it. In general delays to eliminate pops and clicks that are part of the PCM statup path (as opposed to DAPM) are not safe to backport. --GvlH2BAVfmx8aXCn Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAl2JDUYACgkQJNaLcl1U h9Cfjwf/fbkShV8/UolzJ8PGsV1OdUCT+bsh5Q5GlcvcZu/2l/l1tV6XvaHwI8c6 orAex5tPUCGIiJ1hBdJnwp9T44OL7on8a3leXh1tsQt/4aPuI+XFm5n2EUrsKGRe tSG+vOEC0zoGa1mfci8LLtSVL8xmABYz/Umi/EbmVqDJhfQT+yX1yTocAl5x7yhz aSnifbJ4nuOLdwlXeuMPnIVa+MJhP6dsglPd32fEeET8pOuPAEP0/SyeD2Zumzcp oXO+NcQq4o4btSdNY6miy9i/lYtv7f4CI/i4Jo78/Kl2BUVL/zfOTbNvCxNAEUsB ZA84mwXstsAh+I9gwkJ9wxjlLGUqvQ== =7zoR -----END PGP SIGNATURE----- --GvlH2BAVfmx8aXCn--