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=-4.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,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 43A3AC433ED for ; Wed, 28 Apr 2021 05:59:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1562F60E0B for ; Wed, 28 Apr 2021 05:59:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235911AbhD1F76 (ORCPT ); Wed, 28 Apr 2021 01:59:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60984 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235809AbhD1F76 (ORCPT ); Wed, 28 Apr 2021 01:59:58 -0400 Received: from mail-lf1-x129.google.com (mail-lf1-x129.google.com [IPv6:2a00:1450:4864:20::129]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D99E2C061574; Tue, 27 Apr 2021 22:59:13 -0700 (PDT) Received: by mail-lf1-x129.google.com with SMTP id z13so16277340lft.1; Tue, 27 Apr 2021 22:59:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=xzsNPh8QJ6rpsJx8qwIaGMl2EdqborjifVRsL559zII=; b=CPcR0MoJChypavoUphSD8hGQFZU4QOt7bP+noLN+UIescw+eezNc/5HJ9ZLpzJSsQl vKbO76KN4pryjdUPLwxbrW+7svnNq515fHMf3OwCl4i/c9Dh/tQRzl3XNPmtfeVhdxxC l72eCxG857HLpk/8yyoUH8m0tg/+rXviICqfkAoYBECNoSFvLEXReUVQryFg516nc7ra ZNntlFWga7kct/i/fkJGoUqmbjOAYDP3cCtJkOTfe08j2CUo7qyvziQOOAQpSWv1ZZHx oSnFVVep1FE2vDsXn+8F4HjNQSzCKNQgVkyB5NkjWyPxhtaLP/UfCIWr3+tKIFhW3AQH n9ww== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=xzsNPh8QJ6rpsJx8qwIaGMl2EdqborjifVRsL559zII=; b=EnwXIJQQGjPJcX4ogpzPCGRb3GS1ek7ZxtM+ER09tncG1xvHuuu5uEhw2UhsYS21aq N+2GmO44cJiBK4JNpiiLmjm1Iu/A9jLcPmghqP/aTC77QMeqpou0tRdAf29I+0RUdBzY WbSvZSOoF4LWk/ZXCmjH5GOHAHXxG67og6SAB21AnmiVThBVtS2auua/ioppLErYCOJj NEa/WSLTkWSnWOiW8X1P4hz55Ysc9JsVh77uCwFo7razSmRjdl2fvjogQNRKBqRsqbPv h2rEreU7tJXv5J3w51ifdKXcXxjkmjTZSfS5MUM0+pG+cMfwe5CuQwdONrlmkwHPatpG 5lDw== X-Gm-Message-State: AOAM532nmDNrJDq1R8jMXn//7FqM0y5NIiQ2u77DQ+VDSDBtrt2Jg8ZR RnnLGZk7aVUYoKXgzXdTWBOFDYSjD+g= X-Google-Smtp-Source: ABdhPJwsJ1Jsc5Axp48FVR/3lWWuUQbuDEtjYM5zGB1C8ohK+lxiIL9cMk1ms9SHkd0hBC/ccjCAgA== X-Received: by 2002:a19:5517:: with SMTP id n23mr5471964lfe.554.1619589552307; Tue, 27 Apr 2021 22:59:12 -0700 (PDT) Received: from [192.168.2.145] (109-252-193-102.dynamic.spd-mgts.ru. [109.252.193.102]) by smtp.googlemail.com with ESMTPSA id i7sm469674lfv.258.2021.04.27.22.59.11 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 27 Apr 2021 22:59:11 -0700 (PDT) Subject: Re: [PATCH v2 0/5] iommu: Support identity mappings of reserved-memory regions To: Thierry Reding , Joerg Roedel , Rob Herring Cc: Will Deacon , Robin Murphy , Nicolin Chen , Krishna Reddy , devicetree@vger.kernel.org, iommu@lists.linux-foundation.org, linux-tegra@vger.kernel.org References: <20210423163234.3651547-1-thierry.reding@gmail.com> From: Dmitry Osipenko Message-ID: <8032d476-8104-1218-30c6-9fd670c3e7b5@gmail.com> Date: Wed, 28 Apr 2021 08:59:11 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 MIME-Version: 1.0 In-Reply-To: <20210423163234.3651547-1-thierry.reding@gmail.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org 23.04.2021 19:32, Thierry Reding пишет: > Note that an earlier proposal was to use the existing simple-framebuffer > device tree bindings to transport this information. Unfortunately there > are cases where this is not enough. On Tegra SoCs, for example, the > bootloader will also set up a color space correction lookup table in the > system memory that the display controller will access during boot, > alongside the framebuffer. The simple-framebuffer DT bindings have no > way of describing this (and I guess one could argue that this particular > setup no longer is a "simple" framebuffer), so the above, more flexible > proposal was implemented. Will simple-framebuffer be able to use that reserved region transparently? Or will it require a custom simple-framebuffer driver? Could we make simple-framebuffer support a part of this series?