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=-8.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham 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 05161C4332B for ; Mon, 23 Mar 2020 22:00:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C336820753 for ; Mon, 23 Mar 2020 22:00:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585000837; bh=/0FVKzFHqIhe63ISdXNoCbWC3FR+88Guj0g2rxFpzA8=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=UAJ+BZAfhOCNgioeGHyA+wX08Els2d38yBlx9/2YGjBsFAfm3EDF6V47uXJfE3g+c F/1KtETJLIHp9PswbF0YgvZ/2Sn39nk3jdIeFTdxX0XFOQbaD3OyDzAaRDXgU+wYff 3TI1phXgQfHd6GbsWv0Cdd1NguBZaRhEHm2+QSiQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726955AbgCWWAh (ORCPT ); Mon, 23 Mar 2020 18:00:37 -0400 Received: from mail-il1-f195.google.com ([209.85.166.195]:46209 "EHLO mail-il1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726643AbgCWWAh (ORCPT ); Mon, 23 Mar 2020 18:00:37 -0400 Received: by mail-il1-f195.google.com with SMTP id e8so14845445ilc.13; Mon, 23 Mar 2020 15:00:36 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=qFiwHqrhsKdbaQVzkW2fMkiFVAgwIM9ohgEmy5tZ2Xk=; b=h2XaWn25BA8f6ZdtQT7HumjsgZtaP6yjerv0FBvcjkUiO162O/U8UWR7wttUhTeeWU oqYnRtmybdIahgKbbX3/oJSjVv3YUXNh3xwcWzcqR/m8xygehiLopZDBq1jrAlbdIPCY xHNeBep+J2sJNa9jseWm0Yiz9x5OBJV7g4kokMBx0sPHoCkqR4gvaThy8tY4lDJrQ8jL 0S/LPIDNuKTXDs43OCno432UayexhBI0CD+U98M+iPuf288pSCAm8hVgCkHTAMxd25Sv tnTUu3MLCvrUwYwlag+nyW3YskBZZzVw/jgYE8J0mD/oJaKa0DiwkDEkGxRJwUcGrJRg ly4g== X-Gm-Message-State: ANhLgQ0NJn3f7gG+rJpLxyGvxvG+zX7u6pcfAYa7hv2/Vbr+L6wvdoux 1DNmqlDcXFNEaoZMPOujcA== X-Google-Smtp-Source: ADFU+vtSXHZEpiLMs2FsMhDZIZ99EheK1oZfK6YT/nyh4eZQFkcY0AWh7hyF7JqjXt0YhfmzAA9P8Q== X-Received: by 2002:a92:ddcb:: with SMTP id d11mr23249377ilr.211.1585000835890; Mon, 23 Mar 2020 15:00:35 -0700 (PDT) Received: from rob-hp-laptop ([64.188.179.250]) by smtp.gmail.com with ESMTPSA id m18sm5620099ila.54.2020.03.23.15.00.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 23 Mar 2020 15:00:35 -0700 (PDT) Received: (nullmailer pid 10516 invoked by uid 1000); Mon, 23 Mar 2020 22:00:33 -0000 Date: Mon, 23 Mar 2020 16:00:33 -0600 From: Rob Herring To: Jitao Shi Cc: Mark Rutland , Matthias Brugger , Daniel Vetter , David Airlie , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, srv_heupstream@mediatek.com, yingjoe.chen@mediatek.com, eddie.huang@mediatek.com, cawa.cheng@mediatek.com, bibby.hsieh@mediatek.com, ck.hu@mediatek.com, stonea168@163.com, huijuan.xie@mediatek.com Subject: Re: [PATCH v3 1/4] dt-bindings: display: mediatek: add property to control mipi tx drive current Message-ID: <20200323220033.GA29463@bogus> References: <20200311074032.119481-1-jitao.shi@mediatek.com> <20200311074032.119481-2-jitao.shi@mediatek.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200311074032.119481-2-jitao.shi@mediatek.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org On Wed, Mar 11, 2020 at 03:40:29PM +0800, Jitao Shi wrote: > Add a property to control mipi tx drive current: > "drive-strength-microamp" > > Signed-off-by: Jitao Shi > --- > .../devicetree/bindings/display/mediatek/mediatek,dsi.txt | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,dsi.txt b/Documentation/devicetree/bindings/display/mediatek/mediatek,dsi.txt > index a19a6cc375ed..d501f9ff4b1f 100644 > --- a/Documentation/devicetree/bindings/display/mediatek/mediatek,dsi.txt > +++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,dsi.txt > @@ -33,6 +33,9 @@ Required properties: > - #clock-cells: must be <0>; > - #phy-cells: must be <0>. > > +Optional properties: > +- drive-strength-microamp: adjust driving current, should be 1 ~ 0xF TBC, 1-0xf is in units of microamps? So a max drive strength of 15uA? Seems a bit low. > + > Example: > > mipi_tx0: mipi-dphy@10215000 { > @@ -42,6 +45,7 @@ mipi_tx0: mipi-dphy@10215000 { > clock-output-names = "mipi_tx0_pll"; > #clock-cells = <0>; > #phy-cells = <0>; > + drive-strength-microamp = <0x8>; > }; > > dsi0: dsi@1401b000 { > -- > 2.21.0