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=-5.5 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 DBD3BC48BE5 for ; Wed, 16 Jun 2021 20:41:35 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5E71C61076 for ; Wed, 16 Jun 2021 20:41:34 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5E71C61076 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=alsa-devel-bounces@alsa-project.org Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id C245516DE; Wed, 16 Jun 2021 22:40:41 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz C245516DE DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1623876091; bh=mhLIWZiGeiG2xrFjpuiGWElCi/uYrQ99Uv8/gqQ5NXk=; h=Date:From:To:Subject:References:In-Reply-To:Cc:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=epc1qbBFVMD9T0i33KVPYc0AnEEjQQQT6Fw/2OFp+s3zqBAVdXt37Ccdg12+urCmg dq0Gy0BFaDQykdqzjjLeYdtDgkEVLGn0MT9iow+OocuGtQkHLdtBC2zfEobLZmivpy 1haTkAiuB44vALktREA56L/pT8zvxK/LJoAt7kMk= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 4A80AF802E8; Wed, 16 Jun 2021 22:40:41 +0200 (CEST) Received: by alsa1.perex.cz (Postfix, from userid 50401) id B8965F80423; Wed, 16 Jun 2021 22:40:39 +0200 (CEST) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id DA3B1F80165 for ; Wed, 16 Jun 2021 22:40:36 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz DA3B1F80165 Authentication-Results: alsa1.perex.cz; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="qUajzdGG" Received: by mail.kernel.org (Postfix) with ESMTPSA id E09D061076; Wed, 16 Jun 2021 20:40:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1623876033; bh=mhLIWZiGeiG2xrFjpuiGWElCi/uYrQ99Uv8/gqQ5NXk=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=qUajzdGGeCVQE2tR6QDK7HHm3PJpC7IP3CsF2AeFMLxGwLx9Lu4koeza4lUN+j2Re RtBQOUSxrAsTw71Op/fXcJFRzkK0e/6eqElJLtanjxwY0ZYvPdKGDMt93FYLNc4w0j OZ6XVJ0KodJeHZFSDEU9k6GOs/90t1d7yUPmENmgjnWrEPaYPzmjOrwrofRvVRi01k CrxSvL5q9HEfYl236pUogfptpAhUiY+Ayeg+NanQ+jnf8OBgy6Z5OugT1U1Ya2HLI6 M0EcsUhfOPBIb98K+WfA6yZYB5Ullzn7kgtHwYH7u6vHw8H6L9d2Rl7c9tPJp/A1qO X7bZgewuVXBEw== Date: Wed, 16 Jun 2021 21:40:12 +0100 From: Mark Brown To: Pierre-Louis Bossart Subject: Re: [PATCH] ASoC: max98357a: set channels_max to 4 Message-ID: <20210616204012.GD6418@sirena.org.uk> References: <20210526154704.114957-1-judyhsiao@chromium.org> <3501e398-dfba-43b1-4638-325a158e860d@linux.intel.com> <7748e621-ba54-db90-6b56-23e006eb1dbe@linux.intel.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="F8dlzb82+Fcn6AgP" Content-Disposition: inline In-Reply-To: <7748e621-ba54-db90-6b56-23e006eb1dbe@linux.intel.com> X-Cookie: Revenge is a form of nostalgia. User-Agent: Mutt/1.10.1 (2018-07-13) Cc: Taniya Das , "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" , ALSA development , Banajit Goswami , Stephan Gerhold , linux-arm-msm , Patrick Lai , Bjorn Andersson , Liam Girdwood , Tzung-Bi Shih , Takashi Iwai , Tzung-Bi Shih , Rob Herring , Rohit kumar , Andy Gross , Douglas Anderson , Dylan Reid , Stephen Boyd , Judy Hsiao , "moderated list:ARM/Mediatek SoC support" , Cheng-yi Chiang X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" --F8dlzb82+Fcn6AgP Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Wed, Jun 16, 2021 at 11:23:36AM -0500, Pierre-Louis Bossart wrote: > > On this platform there is no TDM support, so there were two I2S data lines. > Interesting, I haven't seen such 'multi-lane' solutions so far for I2S. They're moderately common for high end systems (eg, you'll see surround sound systems do this) - it makes it easier to find higher performance DACs if you can use regular stereo DACs and it helps a bit with layout if you can run slower digital signals. There's controllers upstream that do this without needing to tie together multiple stereo controllers on the SoC side, one of the variants of the Samsung I2S controllers does it for example. --F8dlzb82+Fcn6AgP Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAmDKYasACgkQJNaLcl1U h9DJTgf9GVaBIAfl61pF8E56hCwdxoKRTFOYvXMS9Ro1gyi92ejk9latUAcVfHWS qyfSyeafsZNSMo4/ZHQ6hesfIikj3o7+WDlBf7f74rjQ/2sF2FKVtzqN0CG0/WQ/ 3lFWBL+U/OzQUyBp4GzjndcxgiArjFZ4FqQ0gLM/X/H+cSTThEULsPK1YVZKrbZo 2BUv284pzIGcc2+M7eJK/ssifFkGUBkRoBQGb61GKJSFP9JbWCGLN1iDpj+ruCv1 x6noeMrPikdrtg9bqg2B1xos7vBbi8fgRs/J1T6fynimQ/3G7VwBHJrX50aLoBnH 1lN8LTDUGFKCoBTiT5AUCd0K1Q1gUg== =qHwR -----END PGP SIGNATURE----- --F8dlzb82+Fcn6AgP--