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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED 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 A44F2C04A6B for ; Sun, 12 May 2019 08:55:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7917721019 for ; Sun, 12 May 2019 08:55:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726100AbfELIze (ORCPT ); Sun, 12 May 2019 04:55:34 -0400 Received: from mail-vs1-f65.google.com ([209.85.217.65]:35391 "EHLO mail-vs1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726098AbfELIzd (ORCPT ); Sun, 12 May 2019 04:55:33 -0400 Received: by mail-vs1-f65.google.com with SMTP id q13so1345696vso.2; Sun, 12 May 2019 01:55:32 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=Ow848t2u3LpAUpqXAKwtt4Cf+vUELYwh7/Zxrs8pkng=; b=o/NKuRAQEXAG+HEwIZTmTiIkquSncUYJgF/8eN5T/q4uUSdF0cAhOKLKHshzcP8U+s Rhs0Ds09ytbOP5Nl0pD10RbjG5m5QwEM0443VWnmUtIJpgKDSlrl+6jarLj3hdPor1tv uPZC6t46CfzAICIGzeoIm7F7H2VATHmboM55xBy676gzXwyRO30y9mYW97oKDw6SVqd8 qlVMWPYR8idn0LYO2MrNczlarJXrHgfLxCWfo3yCoZBHloVVPnMX2myqHh1Jsd+kwJ8l ee2E4FOMdz9de+usYI3+UZJad3qZZZE3eFYdk976Q6gFU69svUjj8+OG/VuBh/C9G4tF 9RWA== X-Gm-Message-State: APjAAAV/KGUpiZTykmLExLZ6uLPe9TiSif5klurIUASZjej+L56HDq8W 0Cx5t3fXKkNVZo7aY6guSdYsNFFTsUDoXxh8kwU= X-Google-Smtp-Source: APXvYqx8fhpnx1jG+o7RUM+RTlx+K0ybPOaIQnf4viZNAVVaLQuRbMeV3I8lNMmlRdaz08KipNvdU5CIqkDnaX3zHLQ= X-Received: by 2002:a67:fdd4:: with SMTP id l20mr7036223vsq.63.1557651332429; Sun, 12 May 2019 01:55:32 -0700 (PDT) MIME-Version: 1.0 References: <20190511210702.18394-1-laurent.pinchart+renesas@ideasonboard.com> In-Reply-To: <20190511210702.18394-1-laurent.pinchart+renesas@ideasonboard.com> From: Geert Uytterhoeven Date: Sun, 12 May 2019 10:55:20 +0200 Message-ID: Subject: Re: [PATCH v2 00/10] R-Car DU: LVDS dual-link mode support To: Laurent Pinchart Cc: DRI Development , Linux-Renesas , Kieran Bingham , Andrzej Hajda , "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" , Jacopo Mondi Content-Type: text/plain; charset="UTF-8" Sender: linux-renesas-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org Hi Laurent, On Sat, May 11, 2019 at 11:07 PM Laurent Pinchart wrote: > On the receiving side, the THC63LVD1024 LVDS-to-parallel bridge has two > LVDS inputs and two parallel outputs. It can operate in four different > modes: > > - Single-in, single-out: The first LVDS input receives the video stream, > and the bridge outputs it on the first parallel output. The second > LVDS input and the second parallel output are not used. > > - Single-in, dual-out: The first LVDS input receives the video stream, > and the bridge splits even- and odd-numbered pixels and outputs them > on the first and second parallel outputs. The second LVDS input is not > used. > > - Dual-in, single-out: The two LVDS inputs are used in dual-link mode, > and the bridge combines the even- and odd-numbered pixels and outputs > them on the first parallel output. The second parallel output is not > used. > > - Dual-in, dual-out: The two LVDS inputs are used in dual-link mode, > and the bridge outputs the even- and odd-numbered pixels on the first > parallel output. and the second? > The operating mode is selected by two input pins of the bridge, which > are connected to DIP switches on the development boards I use. The mode > is thus fixed from a Linux point of view. Can the state of these switches be read from software? Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds