From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 73F583630B3; Tue, 2 Jun 2026 15:33:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780414392; cv=none; b=tPuVbY0sDPzZfys5pUyP+NE7gOTIM0omwY7g13jPE3fmoydJFu+8ViTytekBy9exRl63mTMDlasIZn1D5ymfE3zZg/ML4jYWzAJ3dgt5q1ir1uwbx0Jm8VxERx0Ghnr3cWU1Wm6AvOcZprQe+Unj703Iq9XMNewsOx0SueBulUY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780414392; c=relaxed/simple; bh=hE5lg4ZrxvxGScNyLw5phbE5nMNRaCGZ5U0DzxNOAyE=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=cyZTaTnEDG/kMp4OmrwmSfvMBaKW1MhSwC6Jurw4AhraG8OINaeIlKgKQnXaumBuG3GwVJfQCw6I1W2xW5rW78bG4JFBEUqzGtAo1XmCnKDi47k82xmy093R1n8KAIkSFFNr/nqUu1RG/vM8WsegQcxbFpmIJXIf+ixGbJS/jaQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=NjBf3n5n; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="NjBf3n5n" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 188361F00893; Tue, 2 Jun 2026 15:33:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1780414391; bh=Hy916jDLgWGpIbUAJ39IRE6QY96PsOceJjyl4DGOzLU=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=NjBf3n5nQkOvvlpZTghOdxPPRIeOcZybYu5rbM+vh1V/k8/y5pdJzelPWvfju7KfR JS9nD/DxVzzqoNx+X0GwCU+G4kNb974pcer9WAz4sAhJOYK+o3ZE4VVyJ87xEQr2H1 kk8IXu45tMgAAqtU9uEbwiQHNkhnkA0SqdODylsN3o7UEBuSxLSKAiqwzhygzGA/Wz nDlJ/F7ItBjxROHtL/CXS2GKAEQVA2/UHZ6gH183A0w3m0aFhhlYE304NnJ++epVd0 pRsIaffiJNllZfgIIOwnxKrVzIO17AZ6G9Iz7SC+K/Fa/UHDAhyiAC6XY1NGH8H3Lk 1x0iKDwFQRFlg== Message-ID: Date: Tue, 2 Jun 2026 16:33:06 +0100 Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 2/2] arm64: dts: qcom: hamoa: Reserve low IOVA range for Iris To: Val Packett , Daniel J Blueman , Vikash Garodia , Dikshita Agarwal , Abhinav Kumar , Bjorn Andersson , Konrad Dybcio Cc: Mauro Carvalho Chehab , Rob Herring , Krzysztof Kozlowski , Conor Dooley , linux-arm-msm@vger.kernel.org, linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org References: <20260601041336.9497-1-daniel@quora.org> <20260601041336.9497-2-daniel@quora.org> <_39fGr5QVBbTJK-SvJ9y9KoxUbgVw5Sda8smTkFt4BjPipARemW3jLSyt6wnfB0b5i0weVC-dD7RRZ9J0_fHsw==@protonmail.internalid> <809635d9-6e66-4ace-8f47-4a5a268f4f18@packett.cool> From: Bryan O'Donoghue Content-Language: en-US Autocrypt: addr=bod@kernel.org; keydata= xsFNBGRJNSgBEADD7Vm2ZFa+v+JGJ2QYTJqQAkqis/uOHkhdFNXqpBarVBd47QU/DMNU5Rxg jedMQEmHoeDbJ6UOpjbrUQ63c5sgG1JbroHJJctwsEI75OOlekMuebEbjIJBLfgENGwPBMHv piv5TgCWr0VgYaXfp2eh2LINFywzqj823HiDPibQAXDrjzvF1ogksi/6cQZs8d4if8YQkLOr YISFouG+eR0nN1I7mUfIddXOWu6lJeTyqbWVurv58k2ekIXKaOC9ixLHFbcfYV0hOgRaTwQC B8CYF9nfqZla19iItfsN9QxN+ZdQjcRoYipp6HPCMfJlKH7GfaFcW93LKc4DKJ2lVL+pg/OQ lythZbjRPY492NG9kZ65aYstCs90uhMUEVVPuGUw7wBEku+6IEwZfrbMVKeWzLlPyM4Hv9hM 8ktxSmxWsPTPqpBC8eyeAQLalMELAyVcZlkaCtEcbj7w4l/JkYz+4l37obG8ZD+B34udBUUz MsAJ8foDFrBh2MOFA3hxD6G90D23mmWsri7pnKA2tZs92aQX7Ee+FbCyg6g5ln62Sq83ZDbf 53DdBs55EVpBadeInWmXhzCHPQx06H+CwTEjShTYIaMmBfrewvYUDKvFTC5iKQhAEUgt6i94 JsbG7NoeqcxkUMcBOEUQ3uCQG1D70ugspgXc0wd3Rimiq6535wARAQABzSFCcnlhbiBPJ0Rv bm9naHVlIDxib2RAa2VybmVsLm9yZz7CwZEEEwEIADsWIQTmk/sqq6Nt4Rerb7QicTuzoY3I OgUCZ+R+mwIbAwULCQgHAgIiAgYVCgkICwIEFgIDAQIeBwIXgAAKCRAicTuzoY3IOimUD/94 BwVEJX31JRe2sxbB/e1w2p8x1bxvTw5AeIzpV3ox7coJg1bSU2mnGuj1V4o0Yxf/3zmcJzCN VfVjwRF8Ii3GnC7uUXk2t+87piQfKTyJAYQABhZUKgoVJbjJq/S+C3XCKIyBA+EiezoUsgsA jTzwU+FzV7zVWIXFPJNtBERLwboE9w9U3KjAExOa1kSY8eLrsg6kOwlOHWy5UsQqYOjrS96M mzm2xuc1+RCjrndAyYhCnrOKvJ67HsPnBeJCjw7ImGD/U1GchwYbX8o3DO3JNHm3qfC86ZqX 2sCouENg4OzgPTtLKUrueM6xsu6KMM7gj17vxsiR3KQEoJnnMB8D1xtBofN3mFZE0wD9M24m 8yGunZbtntMCUHzIrlJgAPwKWKuGOYtA8UgMTFkccnUJtQrg9KotKtEF/FuftG9zLG9XEkt4 5ZdNgbSoLWgelu3T47mbOJ8LHhiLaCWP7yrovtVAvLUQ1BsiA42u8ECrFCFvQj9nrejE/ICv kP+uqcKtdDvP9HrIGycF1WZyfZLp0RvopKW92FLvI4I1QFWJ+wenk6+LGyJ5bzlrWzevjxmf nHcXE6sJBHrE7eijlbbImDAi3uLYN8Nd9Dm11IDAy4GAIQxSiQn0yblDhPiyGtchy80EVkCm g9k17Wol+2E2mC4DKgVdCkyUtTRSLgsJCs7BTQRkSTUoARAAuTnmWHBS6izRcEE93ajpzI7h dgQO4U3IRvOEsvIKR5NGcNEs0ngGebwsZ/lVULjN4vYU0LleqVhPBidNXUoZCN3A0F0Z2Ov8 NZdef+2EhQPBVWxFO7JBzhe8Z3ALj+wFtlg8akJjBzU56azW/iJzAobqHVrudzKoO2b1/CMg VbiAQ+RXjgfN5kY/HqYDU7mw+hXuUV9PbtX1L8xqQQac95oM9rHzKHHpiVwxTeJnGQsa+THi Kze+YET3rCoGHMvOQEJhdrucTv5FpAakKdkOFNel9FFckLRKEuWgCzhpFsjQ7xbirQgFUxG9 vlk1+q4hMRGNyEqoD6svYEeqbiUSd0oPUJeioiC3rNMRCNHLVrfZ2J6SCPkxfda08uzSdDQU 1/YPjOh8ZtQDMu7WctZ3XO288Z1gyBR49V7fbFs2w4sQxG+h/enlxqP7fdw1mjUlZjU5huCJ ielS0oEaIpmUpkugli7x4WhwLnhK2EbSoz7nLBC0y+ALUOdMlz/Y1l9xRt+bkDhpmf4O4IcI MxgZ0QMLq8rHDkGaEbsgZZHQPS58T0XE3IP30Q9SNxsruCMXtd2hYtBssf/wohc6JVsTtMg2 VYTPDPIFNZFSXupEJB7jlqpDWJ8ooJfJRLBatbjT5+mVQaMYB7Hs/t+zWYWaJKHyc8O6WLEC NUV5Tdt5EkkAEQEAAcLBdgQYAQoAIBYhBOaT+yqro23hF6tvtCJxO7Ohjcg6BQJkSTUoAhsM AAoJECJxO7Ohjcg6LuIQALnXt36OUuK43wqw6UYt0cnN6EbUqJHApAF5eNFn0jCCB2XELjSz JKJwuNAweowBdabiBniJ+501WIW+ewEsz1uby5fUQjZuCEsIkuaIluyfUFPb73qrQyAGuusd 7teA4WT+/jUku9g7lX5sVoRCrKQPkd16f6Bzfztyqyjcn43/X5yQI+wlboQ6HuKe/3I3yiOx OgmCHzOawpC9PvhEcKj79RLM3Zz5Ts5AuHpRX70Jz8Be76LwVFLp5Msx3S24ZTU1lBo2uiJ3 xSkay2lTpyVWRPx9vgcwzxGguOPJQJwsQeLb7wpoJMPpD3ERoaRii7Q7hvmxklpZjhKYWB3d t6nQ497Ek9loCrp3MIjRCSDN5xEGffiHks9yTeGMUQwO4tX8RE04uOJPkUY7uCFzFqN6/qey X3oFfPgkULMdiHofPAL1OskZSTzGPSfTYRE46NCJw8yoZBQ/oOyWeqaUQbK0wmW/g81wm8p7 LKSGEglMpiX07M1AotgvylN5C8fjbouoK+/RAMsXkk8jba6rPfuuXPaDjCyyKn6zSVHETnHW 3AJbgVY50T8STpnxayBQvWbCvu+6NOEjXCbyaOJig+5l0zlGN9XHjdANXC5HnwmyaGRL9YDq Jh2nVXVJDincOdQRdKcJjYLqaOAoWrYWSDi1iZGspHBTDrnOvfMQzzHY In-Reply-To: <809635d9-6e66-4ace-8f47-4a5a268f4f18@packett.cool> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 02/06/2026 16:03, Val Packett wrote: > > On 6/2/26 7:26 AM, Bryan O'Donoghue wrote: >> On 01/06/2026 05:13, Daniel J Blueman wrote: >>> On X1-family hamoa platforms, Iris DMA below IOVA 0x25800000 (600MB) >>> triggers unhandled SMMU page faults >> >> How do we know that is a correct address - does it come from qcom >> documentation or trial and error ? > > > If you follow the Link:, you can see that it does come from qcom.. > > https://github.com/qualcomm-linux/kernel-topics/issues/1157#issuecomment-4458933574 A rhetorical and leading question - the commit log should just explain what is going on.. > This series is basically a "hotfix" version of a more complicated series: > > https://lore.kernel.org/linux-media/20250627-video_cb-v3-0-51e18c0ffbce@quicinc.com/ > that introduced an extra subnode that let the driver only use that > restricted IOVA range for non-pixel buffers (only those actually need > the restriction) but that resulted in a very long discussion and was > kinda shelved because of that.. x_x This and the subsequent require a Fixes: I think this change is OK wrt to bindings because we are adding not subtracting - but I'd like the commit log to actually explain whats happening not give me links to random places. --- bod