From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 CB4323E558E; Mon, 30 Mar 2026 22:51:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774911105; cv=none; b=cLip8Ns2rExKnpjVE+ackyTYMYWRTeD+URazXm6/JB/5V4xVM3yhT0+Pd6WPFKYeih9YatA4wHh3SqR3xSGMJFjwooZqlkWHjN56qXMjbYj73JnbaXBf9b2vjAPP9L+ScstSRm/zbroL4B7ft8umsr0tTVqirxjvAHHpnnQchGo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774911105; c=relaxed/simple; bh=sZbLXgQ+6kP76ofonMlDS/YV34qv00ytaH54zjiNlXw=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=pTZqlFq5wics7Hor+wdiFZxfRGhCoGfIIEr+906HLK7ismCaEpMjoKpFbE9S+eR/Z0emm3LKUWfccIaDOrbAeDVlN5xBSrOYh5WwmIzO/shHc68Ax+kJGTcveSZIEfgjV3Ubig2dVwgOaHDSBnuC5e6Y6XhVNs7QxcUaqpURvoo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=CV5QRESV; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="CV5QRESV" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DAD46C4CEF7; Mon, 30 Mar 2026 22:51:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1774911104; bh=sZbLXgQ+6kP76ofonMlDS/YV34qv00ytaH54zjiNlXw=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=CV5QRESVXFA/k9ZtUf/LsWhAYAd4eFG5+kG5RgTHAMgL/2UHrXSRXcjc3CXaTKCZH whBSWAfUYCeU/Xm9r67+wm9PKnj7ZJvIaek+cfe2+NTl7C16Qcz0Ydqqhn5Gr8iAxu k08dMaByqdzSDe2OG3SZwov3HqG2yvwOAYtVoCmKUk1Kcir+ZOgkUM+CCLkG60zoYj ec2MdmAKVvEquWkw9tepqoeCq9zcxj3B0maiPN4apZwk1dJCJfjuYwzuvaEmUGNyTr D0o0PlhXJ2lSfvcFWNtSWsk8aFIu7gtVC4HgSxpd4ilzMP9pHfNqK3GSTl5NXUhFeU Be2sPVau6rGtQ== Message-ID: <96d3bb35-3fae-47e4-b484-1a37f2f41b43@kernel.org> Date: Mon, 30 Mar 2026 23:51:38 +0100 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC PATCH 2/3] media: qcom: camss: Add CAMSS Offline Processing Engine driver To: Dmitry Baryshkov Cc: johannes.goede@oss.qualcomm.com, Loic Poulain , vladimir.zapolskiy@linaro.org, laurent.pinchart@ideasonboard.com, kieran.bingham@ideasonboard.com, robh@kernel.org, krzk+dt@kernel.org, andersson@kernel.org, konradybcio@kernel.org, linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, mchehab@kernel.org References: <1ba54ec0-be51-4694-a79b-f272e76303d2@kernel.org> <12194cc0-0960-486c-be7e-1a22d95de340@kernel.org> <7fc31426-3157-49c7-a30d-dcd7b181fcc6@oss.qualcomm.com> <8DTHyPLaUjGKd83PvBsisjn_SnpUnvkateTtwz9P6CChP9VGfDyQmJa4Rfd5KwOBOLhtGFJPDzfHrXC4zvV-Fg==@protonmail.internalid> <0330f63f-7137-4484-954a-fc0776a9b052@oss.qualcomm.com> <0879e4c1-5381-4a70-9fb3-4af9b3bf6e48@kernel.org> <4hasliun3wkook2pvfkntjlzs7elu67ine5q7nd7ptjthx5qvw@rntvb7lnajpc> From: Bryan O'Donoghue Content-Language: en-US In-Reply-To: <4hasliun3wkook2pvfkntjlzs7elu67ine5q7nd7ptjthx5qvw@rntvb7lnajpc> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 30/03/2026 19:55, Dmitry Baryshkov wrote: > This sounds like the most horrible idea: letting userspace directly > program any registers in a way that is not visible to the kernel. No I'm wondering if there is a way to construct the basic format in user-space so it doesn't need to be re-interpreted stuffed/unstuffed. As mentioned I believe there is a defunct qcom project which did/does just that, not sure why that hasn't been investigated/developed. --- bod