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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id C7ADEC433EF for ; Mon, 21 Mar 2022 09:22:52 +0000 (UTC) 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 C385016F5; Mon, 21 Mar 2022 10:22:00 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz C385016F5 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1647854570; bh=js3Rr+dGBwxPT5O2sAogbnMjmIOd+kG1mAzBVLLRx5o=; h=Date:From:To:Subject:References:In-Reply-To:Cc:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=ZNGQz5OF31w9xjq16oW1QTkf5e/Xuk4FsPB26iKB22TXUPxjRhk3DItppArGeQMLV ydF8koV1bq0+H3JBFfyKhn3KQxhWp67oiZJjB1TLiGZEGiy0ffKycUspUWmWPgnddr 04NgY7fe4kU4LxEQ0dTp2nsdBtJQcin7AqI3SUew= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 64AB7F80116; Mon, 21 Mar 2022 10:22:00 +0100 (CET) Received: by alsa1.perex.cz (Postfix, from userid 50401) id 8CEA8F80227; Mon, 21 Mar 2022 10:21:58 +0100 (CET) Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id 24EF0F80116 for ; Mon, 21 Mar 2022 10:21:51 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 24EF0F80116 Authentication-Results: alsa1.perex.cz; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="njg8O/W4" Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id CB0A5611E1; Mon, 21 Mar 2022 09:21:49 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id CE151C340E8; Mon, 21 Mar 2022 09:21:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1647854509; bh=js3Rr+dGBwxPT5O2sAogbnMjmIOd+kG1mAzBVLLRx5o=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=njg8O/W4Vv3IECCZJM2JewVvH2vhm/jUaAYsDEQCWqJEgtkAsUVGs4K/8FcdpyR71 YjV1ksexpq42ejRKGzipRXOojPfkM/Q7xSNrXdq6JsKQWhkzJ7rOAC15x1NcxNerTU un6vKgzW5+68tp0PAizpMFw8QEXn9ec5oKQs4+546vK0dWR7HZ2kyk4ldf40i/Qe8r k1QnGilipJlO+hW0rVt0F1Aur7Wk9ZqXUiX5E9LZuEJ7i5vVUU3CQxVF3QT1LutpPz sIoozG+4fpjWdnp8YvNE/yHISY8DpgnYVsWpiG9oBKBUE/2Mw+q2mm/sQo6p12Go8A epZkZzxjmBvdA== Date: Mon, 21 Mar 2022 17:21:44 +0800 From: Tzung-Bi Shih To: Jiaxin Yu Subject: Re: [v5 3/4] ASoC: mediatek: mt8192: refactor for I2S8/I2S9 DAI links of headset Message-ID: References: <20220319114111.11496-1-jiaxin.yu@mediatek.com> <20220319114111.11496-4-jiaxin.yu@mediatek.com> <17e6e8895ebc1113911481c7e097b394005db123.camel@mediatek.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <17e6e8895ebc1113911481c7e097b394005db123.camel@mediatek.com> Cc: devicetree@vger.kernel.org, linmq006@gmail.com, alsa-devel@alsa-project.org, robh+dt@kernel.org, linux-kernel@vger.kernel.org, Project_Global_Chrome_Upstream_Group@mediatek.com, broonie@kernel.org, linux-mediatek@lists.infradead.org, trevor.wu@mediatek.com, matthias.bgg@gmail.com, aaronyu@google.com, linux-arm-kernel@lists.infradead.org, angelogioacchino.delregno@collabora.com 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" On Mon, Mar 21, 2022 at 05:14:08PM +0800, Jiaxin Yu wrote: > On Mon, 2022-03-21 at 11:59 +0800, Tzung-Bi Shih wrote: > > On Sat, Mar 19, 2022 at 07:41:10PM +0800, Jiaxin Yu wrote: > > > @@ -1145,6 +1140,13 @@ static int mt8192_mt6359_dev_probe(struct > > > platform_device *pdev) > > > goto err_speaker_codec; > > > } > > > > > > + headset_codec = of_get_child_by_name(pdev->dev.of_node, > > > "mediatek,headset-codec"); > > > + if (!headset_codec) { > > > + ret = -EINVAL; > > > + dev_err_probe(&pdev->dev, ret, "Property > > > 'headset_codec' missing or invalid\n"); > > > + goto err_headset_codec; > > > + } > > > > (to be neat) Does it have any reason to prevent from using > > of_parse_phandle() > > but of_get_child_by_name()? > > "mediatek,headset-codec" is a child node of pdev->dev.of_node, so I use > of_get_child_by_name() to get and pass it to > snd_soc_of_get_dai_link_codecs(). "mediatek,platform" and "mediatek,hdmi-codec" are also children of pdev->dev.of_node. I guess my question is: why doesn't it also use of_parse_phandle() for "mediatek,headset-codec"? Did I misunderstand?