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[188.141.3.146]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-454a9969f2asm49958455e9.8.2025.07.04.01.23.07 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 04 Jul 2025 01:23:08 -0700 (PDT) Message-ID: Date: Fri, 4 Jul 2025 09:23:06 +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: [PATCH v3 0/5] Introduce "non-pixel" sub node within iris video node To: Dmitry Baryshkov Cc: Konrad Dybcio , Krzysztof Kozlowski , Vikash Garodia , Dikshita Agarwal , Abhinav Kumar , Mauro Carvalho Chehab , Rob Herring , Krzysztof Kozlowski , Conor Dooley , linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <5ad418d9-8199-43c9-a477-1e3b939c054c@kernel.org> <7b6db4fa-2f73-376d-4eb3-64c1c7e6cda3@quicinc.com> <5qsgbqml367yq6g5vb4lotrzulojqhi5zlwwribze373a63qrn@rxi4kwyt66m2> <4f38058d-a2f1-4ac5-b234-228cfb2e85ff@kernel.org> <1ad2ca1e-1d57-4ad8-a057-ab0d804f1d49@oss.qualcomm.com> <7da769b4-88e9-401f-bb21-0ff123818b9c@kernel.org> <6840d462-8269-4359-a6e5-d154842b62db@oss.qualcomm.com> From: Bryan O'Donoghue Content-Language: en-US In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 03/07/2025 22:23, Dmitry Baryshkov wrote: >> I still give my RB for the series. >> >> To me the only question is should it be applied to sm8550 or to new SoCs >> from now on, sa8775p, x1e and derivatives. > I think we need to apply it to_all_ SoCs, maybe starting from MSM8x26 > and MSM8x16. Likewise, we need to think bout secure buffers usecase. And > once we do that, we will realize that it also changes the ABI for all > SoCs that support either Venus or Iris. I think a dts change is a non-starter as its an ABI break. So if ABI break is out and reworking future dts to allow for a new device is out, then some API change is needed to allow the driver to stop the kernel automatically setting up the IOMMUs, create the new device as a platform device not dependent on DT change and have the probe() of the relevant drivers setup their own IOMMU extents based on - probably indexes we have in the driver configuration parameters. --- bod