From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 92EA92564 for ; Thu, 7 Apr 2022 14:04:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1649340242; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=8dmlhw2gM3dighZKD1hw4c9m67LEmQRFc8UEGhxCeHA=; b=SS0/Iim/AIbxK+D+j3nHnK8pPSYMrhdZwQd7IZLYGOsjVNHRWKK3veK9zpPxPZWOmpNjxZ h/8GC+UpA4GaOvK7/BeFcH2OqzU8saB35VU81+bOCtrDnkEXhJezkK7JVe1sM/APyhth9E Sq2lhCDa/BRcyHZPpkRK77t5wAi5ToM= Received: from mail-qt1-f198.google.com (mail-qt1-f198.google.com [209.85.160.198]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-494-maRkon0mNmWY9Ms9S_YP9Q-1; Thu, 07 Apr 2022 10:03:59 -0400 X-MC-Unique: maRkon0mNmWY9Ms9S_YP9Q-1 Received: by mail-qt1-f198.google.com with SMTP id t19-20020ac86a13000000b002e1fd2c4ce5so5577345qtr.5 for ; Thu, 07 Apr 2022 07:03:59 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=8dmlhw2gM3dighZKD1hw4c9m67LEmQRFc8UEGhxCeHA=; b=jCdj8gn5Qrfu90PbIGsdOTf51Qdcwbso4/9tJUyIVyMx4QyF60gdaRRVvWdAKAUXrr X1fRF3Kby4QUwQopfmppqDuwrVx3QHxC/bX0l9hUMq1umaK2rg1S5bxm+4IJuu33F/oR fuwbDkzEZ0tNjgSj/ZQHgQyru+efkBSMnfw2X5ATxkG2xkdk7x9U9pFaFEdSf/vuhTVz qBceLcjSYUsYPvfy61XomCgZMAL7a4UXX00kIPrI2axFEIzK09adK7FDmcJwtMaBWKS0 mUx5kj9qeCnTKUyc7VzTs0PJBtLgHDm+S4wWXfptSP65o7ULMtxCo/OOIo0Wk0tqnGSo VA+Q== X-Gm-Message-State: AOAM533y7rss3SFwfkCXZbPh3DF+KsxxuEdAhCeLuWElDt1seR6T5z4B IEBLzmcF1upzD7cNu6iWkw9YF1eK5M10bGwyehHmCpiZc6UyXYk2wl1DOf5MqEiY34ht8sQugEq n8z0DPa417MD3xPFHG6c7uRxmoA== X-Received: by 2002:a05:620a:424e:b0:67e:4c1b:c214 with SMTP id w14-20020a05620a424e00b0067e4c1bc214mr9398819qko.651.1649340238619; Thu, 07 Apr 2022 07:03:58 -0700 (PDT) X-Google-Smtp-Source: ABdhPJxeuhfUl7E5olUFie0FR1INlu5Q2ZTtT17yGQlnofo6l7qsijU3A/ijXWkDpwqeMJySvpGrYQ== X-Received: by 2002:a05:620a:424e:b0:67e:4c1b:c214 with SMTP id w14-20020a05620a424e00b0067e4c1bc214mr9398784qko.651.1649340238357; Thu, 07 Apr 2022 07:03:58 -0700 (PDT) Received: from fedora (modemcable200.11-22-96.mc.videotron.ca. [96.22.11.200]) by smtp.gmail.com with ESMTPSA id h6-20020ac85e06000000b002e1e8a98abbsm16006501qtx.41.2022.04.07.07.03.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 07 Apr 2022 07:03:57 -0700 (PDT) Date: Thu, 7 Apr 2022 10:03:55 -0400 From: Adrien Thierry To: Stefan Wahren Cc: linux-kernel@vger.kernel.org, Rob Herring , Nicolas Saenz Julienne , Florian Fainelli , Ray Jui , Scott Branden , bcm-kernel-feedback-list@broadcom.com, devicetree@vger.kernel.org, linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Greg Kroah-Hartman , Gaston Gonzalez , Ojaswin Mujoo , linux-staging@lists.linux.dev, Krzysztof Kozlowski Subject: Re: [PATCH v2 0/2] Add support for bcm2711 in vchiq_arm Message-ID: References: <20220324172647.167617-1-athierry@redhat.com> Precedence: bulk X-Mailing-List: linux-staging@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 In-Reply-To: Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=athierry@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Hi Stefan, Thanks for your feedback. > Could you please explain your approach, especially leaving out 36 bit > DMA support? I realize I overlooked this 36 bit DMA support issue, I need to think it through a little bit more. > This is a really bad idea and caused a lot of trouble in the past. A lot > of the issues in the Fedora or Arch Linux forums or mailing lists > results from this idea. It wastes the time of the kernel developer since > these DT files has never been reviewed by the devicetree maintainers. I understand, thanks! I find the downstream dtbs convenient because of the overlay system that allows you to easily enable certain drivers, but I get your point. Best regards, Adrien