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=-5.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS, USER_AGENT_MUTT 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 6F471C04AB4 for ; Tue, 14 May 2019 20:49:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3DC8E20850 for ; Tue, 14 May 2019 20:49:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1557866956; bh=rB2t2WMPfjjoP/VNZu3XhL+a7N8l6usZQ4fcSo8sRJM=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=SRPJieIUPqz14ZCF/enPYPEN+i3nk0iwCsVB5HSNjdgSBrxG87CoFaHcCenzhcqw1 Ku4Kwo0sqWbS2MRc0LLgpDwOBoIY5jxU7K8QFDPLu/fhhSy8nu/JODPFtUd16Dz5Iz C59ls2n4uiFQAxvWYKwKlS1l55tHhYqvgcofKx4g= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726424AbfENUtP (ORCPT ); Tue, 14 May 2019 16:49:15 -0400 Received: from mail-oi1-f193.google.com ([209.85.167.193]:40817 "EHLO mail-oi1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726134AbfENUtO (ORCPT ); Tue, 14 May 2019 16:49:14 -0400 Received: by mail-oi1-f193.google.com with SMTP id r136so162224oie.7; Tue, 14 May 2019 13:49:14 -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=6T3Ip6O04LTKLd5qWK9Ww230fOKy3msDw8KUYfWmvPM=; b=iUbAM7QVkpgpoEs5CcDQYrjDuiU7qevvs5/5MiHV9I6wywOPNPwdFu9LzxlkKW2M8a ZgU8/4PLCwQ10jbE/4cyahAHMdDFF1mm6H48hg6EGX0HqmyJk2MWiVhJq6++sJqgv1Mn E6w6XsUtbQVG1iGWAtefVo1HFGhAmYhaUiqamv1/ldA4VWHnkIfIRtcdZ5qYrSsLtiyV jLAH1/PxmxFxEuK4zNVR01Ozc63cL5qzVRDe1cagk+WLel+ENBkAoxFzFEbqEFH4KDrW gwcQIvZyqZQSfbnLB8xqvgIYDtbCWq62vOF2bdugMrhyvB1fOKKcQjEATUlIMx9hI6tP fBig== X-Gm-Message-State: APjAAAWV+CFoExpfjbut8SMr3UC783FXAEPyJ2Wlm3m7MyGk1TNq9LO5 II8qCj5DfxnSo+lLTgRAZg== X-Google-Smtp-Source: APXvYqw9r62Myv1ZK5vENIP2ad0ZFC9OJdOjoMmtmV5w3i5Ay9PLbIuaxAG0cmS6uL2JJgGZGo7oTQ== X-Received: by 2002:aca:7255:: with SMTP id p82mr372346oic.119.1557866953685; Tue, 14 May 2019 13:49:13 -0700 (PDT) Received: from localhost (24-155-109-49.dyn.grandenetworks.net. [24.155.109.49]) by smtp.gmail.com with ESMTPSA id o124sm1524501oig.23.2019.05.14.13.49.12 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 14 May 2019 13:49:12 -0700 (PDT) Date: Tue, 14 May 2019 15:49:12 -0500 From: Rob Herring To: Douglas Anderson Cc: Heiko Stuebner , Sandy Huang , Andrzej Hajda , Laurent Pinchart , linux-rockchip@lists.infradead.org, Neil Armstrong , Mark Rutland , mka@chromium.org, Sean Paul , Douglas Anderson , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, David Airlie , linux-arm-kernel@lists.infradead.org, Daniel Vetter Subject: Re: [PATCH 1/5] dt-bindings: drm/bridge/synopsys: dw-hdmi: Add "unwedge" for ddc bus Message-ID: <20190514204912.GA25548@bogus> References: <20190502225336.206885-1-dianders@chromium.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190502225336.206885-1-dianders@chromium.org> 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 On Thu, 2 May 2019 15:53:32 -0700, Douglas Anderson wrote: > In certain situations it was seen that we could wedge up the DDC bus > on the HDMI adapter on rk3288. The only way to unwedge was to mux one > of the pins over to GPIO output-driven-low temporarily and then > quickly mux back. Full details can be found in the patch > ("drm/bridge/synopsys: dw-hdmi: Add "unwedge" for ddc bus"). > > Since unwedge requires remuxing the pins, we first need to add to the > bindings so that we can specify what state the pins should be in for > unwedging. > > Signed-off-by: Douglas Anderson > --- > > .../bindings/display/rockchip/dw_hdmi-rockchip.txt | 7 +++++++ > 1 file changed, 7 insertions(+) > Reviewed-by: Rob Herring