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Wed, 30 Sep 2026 03:33:32 -0700 (PDT) X-Received: by 2002:a05:620a:40d0:b0:93c:6a0d:762 with SMTP id af79cd13be357-93ca93365f1mr132038785a.0.1790764411558; Wed, 30 Sep 2026 03:33:31 -0700 (PDT) Received: from [192.168.202.12] ([178.235.128.140]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-6ae047e9a39sm671766a12.1.2026.09.30.03.33.26 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 30 Sep 2026 03:33:30 -0700 (PDT) Message-ID: <687c93e7-4ac4-4a97-b139-c1bd257670ca@oss.qualcomm.com> Date: Wed, 30 Sep 2026 12:33:25 +0200 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 v5 12/13] arm64: dts: qcom: sm8650: Add Iris context bank subnodes To: Vikash Garodia , Dikshita Agarwal , Abhinav Kumar , Bryan O'Donoghue , Mauro Carvalho Chehab , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Bjorn Andersson , Konrad Dybcio , Stanimir Varbanov , Neil Armstrong , Dmitry Baryshkov , Bryan O'Donoghue , Stephan Gerhold , "Joerg Roedel (AMD)" , Will Deacon , Robin Murphy , Abel Vesa Cc: linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Krzysztof Kozlowski , iommu@lists.linux.dev, Vishnu Reddy References: <20260926-vpu_iommu_iova_handling-v5-0-0322ca5dc10c@oss.qualcomm.com> <20260926-vpu_iommu_iova_handling-v5-12-0322ca5dc10c@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20260926-vpu_iommu_iova_handling-v5-12-0322ca5dc10c@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Info: AW1haW4tMjYwOTMwMDA0MSBTYWx0ZWRfX6w7tJSlMu5tI pDcfrANriFnd/A86k8FDfTqQlwm9urkCy7AF6DCwxTDKgmlId4sQXew8oQPGsrTbXiz/ye9f3kv jRa9WHKs0MhiJbVRGuG9CjsHN11zmnM= X-Proofpoint-ORIG-GUID: NhILqKJ9Uzgn-ZwdjhgKF_zf8o3XUg9C X-Authority-Analysis: v=2.4 cv=VrC2kO2n c=1 sm=1 tr=0 ts=6abce57d cx=c_pps a=50t2pK5VMbmlHzFWWp8p/g==:117 a=PRfkaYvzSr8QmIIGAkY2Sg==:17 a=IkcTkHD0fZMA:10 a=VdqzKS8jKosA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=DJpcGTmdVt4CTyJn9g5Z:22 a=EUspDBNiAAAA:8 a=4BULcDCo1EIeXDFKsSoA:9 a=QEXdDO2ut3YA:10 a=IoWCM6iH3mJn3m4BftBB:22 X-Proofpoint-GUID: NhILqKJ9Uzgn-ZwdjhgKF_zf8o3XUg9C X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTMwMDA0MSBTYWx0ZWRfX16aG+N111Os2 sbhISCPNdj0d5abFAayyA0JLfbzSe+iQlEgLLRo4dBP4+mqKQl2E9NRuPf7eB8SfePXveex7jcv KcFoqp4X0ujQqk4e2gzV4NZObAED8f6QmgQQcp0Z1tZI8HHO1LWlLtw4Hd3k7wmyqIPKRqTmPpz YAykR8QFj+Ve0I4NPJq5kx4LUEFeJBU4zVt5ts0YAzQ+tjmx5IU+iqF3L/+ISvf9lI6yGy7fgZL LtIHsj4l4P24sJebMTGLxS7VjilbmCf7jTYVQbeOm0EuXuioONJkuG88n50kEIfuAasRWFD0S8w 2fCYGnk+xb0/SRxV68zZ8NRetz6HYiu/hgNb/Lib6Xa39qiG8cll353dgQfCiXXPlmBfwYulmaL pRumSG9jYG2nIbEqDwtOmHamhwryCYyG+/BVi79V4DKkEjOhe8qxJ5W428J0rZ6b/AuBT8ScasY MWeIl8gfVRyFVDdmENw== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-30_01,2026-09-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 adultscore=0 impostorscore=0 clxscore=1015 malwarescore=0 bulkscore=0 lowpriorityscore=0 suspectscore=0 priorityscore=1501 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2609300041 On 9/26/26 8:34 AM, Vikash Garodia wrote: > The VPU issues DMA through several SMMU streams, and the hardware does > not give every stream the same addressable range. The non-pixel stream > cannot address the low 600MB of IOVA space, while the pixel stream can > address the full range: > +-----------------------------------------------------------+ > | non-pixel stream addressable range (600 MB - 3.5 GB) | > | 0x25800000 - 0xe0000000 | Reviewed-by: Konrad Dybcio Konrad