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Tue, 18 Aug 2026 00:56:06 -0700 (PDT) X-Received: by 2002:a05:6a20:b598:b0:3bf:b1d3:393e with SMTP id adf61e73a8af0-3cc719c7b62mr39663651637.2.1787039766180; Tue, 18 Aug 2026 00:56:06 -0700 (PDT) Received: from [192.168.0.172] ([183.83.138.247]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-14152ea340csm13242759c88.0.2026.08.18.00.56.01 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 18 Aug 2026 00:56:05 -0700 (PDT) Message-ID: <8a9b417f-11cf-4dd8-af3f-494afa38b868@oss.qualcomm.com> Date: Tue, 18 Aug 2026 13:25:58 +0530 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] media: venus: Fix iova allocation from restrict region To: Dmitry Baryshkov , Vishnu Reddy Cc: Dikshita Agarwal , Abhinav Kumar , Bryan O'Donoghue , Mauro Carvalho Chehab , Hans Verkuil , Stefan Schmidt , Stanimir Varbanov , linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org References: <20260812-reserve_iova_in_driver-v1-0-ed62f801275c@oss.qualcomm.com> <20260812-reserve_iova_in_driver-v1-2-ed62f801275c@oss.qualcomm.com> Content-Language: en-US From: Vikash Garodia In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Info: AW1haW4tMjYwODE4MDA1NyBTYWx0ZWRfX2RnbJCANO3Ig s5V7ln2JGDlqUCTv6Wk7noXG67/R1iPkmglNZVaV2dTV5SyXlV57PAmBTsxoK/o5CWVLCpnbCs2 Tqg6IHbZj9zYc8mvAYVuTOZf8OqjrnM= X-Authority-Analysis: v=2.4 cv=VuITxe2n c=1 sm=1 tr=0 ts=6a841017 cx=c_pps a=Qgeoaf8Lrialg5Z894R3/Q==:117 a=nRfyoPPwyR/Y6OrExC/i1g==:17 a=IkcTkHD0fZMA:10 a=Sv0fKeRqtYgA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=gowsoOTTUOVcmtlkKump:22 a=IgWHIWh_6YLybfuA14QA:9 a=QEXdDO2ut3YA:10 a=x9snwWr2DeNwDh03kgHS:22 X-Proofpoint-GUID: czizAwphpbYHTs3Xi_8oEjiU_6h4G4vd X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODE4MDA1NyBTYWx0ZWRfXwPTuz32dRVhF If22Dk3nN9pDEDqfWWNmUI+zg5WOIqjTZdjxE/g/rKiy66pNlMh2Y4bL31hcjOyROb9g39MT8pl avrF9oLsUcGaYSeZ+i9Qkp7DufoOgJTYWZV77yXomDVR8S1j92103d17+BnLlyWk5JUI/SlUrr6 +NAC/EWejh51yMcfSgUqhgbL9OXyC4PujG1+gliobvQ8ob7sgXRxLBgnqyqiwKdmPd7JjEHv+0M 8/H1t6oBJWiziMN5Qi31R7uMxqHcjWhdMLkhtu5QTs3unZeKa5BN/yGdD/68vDph1zitRWK7lYy QDxLrqkseqfMigs2gA0oRlwGV+xR+6Apl5L548UykptaeQdqan+RLpjWvXrh7F0CyHM572yPmrQ c/3uqDujVx+KX95TrbUy2dTHGKb/dmDaow1anggxmtTNy+CPMREsGUcmxk23zyEz5Oi1no+X75d 1hc1EPzaYr1l6jQ04lg== X-Proofpoint-ORIG-GUID: czizAwphpbYHTs3Xi_8oEjiU_6h4G4vd 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=2026-08-17_04,2026-08-12_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 priorityscore=1501 clxscore=1015 spamscore=0 adultscore=0 impostorscore=0 lowpriorityscore=0 bulkscore=0 malwarescore=0 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608180057 On 8/18/2026 12:34 PM, Dmitry Baryshkov wrote: > On Wed, Aug 12, 2026 at 04:25:59PM +0530, Vishnu Reddy 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 | >> +-----------------------------------------------------------+ >> | pixel stream addressable range (0 - 3.5 GB) | >> | 0x00000000 - 0xe0000000 | >> +-----------------------------------------------------------+ > Does this split apply to all generations of Venus? We support MSM8916, > for example. There has been work to enable MSM8974. Yes, applicable for all VPUs Regards, Vikash