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Fri, 17 Apr 2026 07:35:40 -0700 (PDT) X-Received: by 2002:a17:90b:5543:b0:35f:bddd:3860 with SMTP id 98e67ed59e1d1-361403b18f5mr3379859a91.6.1776436539609; Fri, 17 Apr 2026 07:35:39 -0700 (PDT) Received: from [10.206.105.200] ([202.46.23.25]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-361419739dfsm2325369a91.13.2026.04.17.07.35.32 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 17 Apr 2026 07:35:38 -0700 (PDT) Message-ID: <5c04e57a-efc0-f5f9-f53c-04b9bcaa1c8d@oss.qualcomm.com> Date: Fri, 17 Apr 2026 20:05:30 +0530 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101 Thunderbird/102.8.0 From: Vishnu Reddy Subject: Re: [PATCH 06/11] media: iris: Fix VM count passed to firmware To: Konrad Dybcio , Bryan O'Donoghue , Vikash Garodia , Dikshita Agarwal , Abhinav Kumar , Mauro Carvalho Chehab , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Joerg Roedel , Will Deacon , Robin Murphy , Bjorn Andersson , Konrad Dybcio , Stefan Schmidt , Hans Verkuil Cc: linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, iommu@lists.linux.dev, stable@vger.kernel.org References: <20260414-glymur-v1-0-7d3d1cf57b16@oss.qualcomm.com> <20260414-glymur-v1-6-7d3d1cf57b16@oss.qualcomm.com> Content-Language: en-US In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Proofpoint-GUID: oUsSf5Z-GfnAreZkWTxtY1eh9jG4xuTk X-Authority-Analysis: v=2.4 cv=XNoAjwhE c=1 sm=1 tr=0 ts=69e2453d cx=c_pps a=0uOsjrqzRL749jD1oC5vDA==:117 a=ZePRamnt/+rB5gQjfz0u9A==:17 a=IkcTkHD0fZMA:10 a=A5OVakUREuEA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=ZpdpYltYx_vBUK5n70dp:22 a=y21pM0OG2rRs8fqayMkA:9 a=QEXdDO2ut3YA:10 a=mQ_c8vxmzFEMiUWkPHU9:22 X-Proofpoint-ORIG-GUID: oUsSf5Z-GfnAreZkWTxtY1eh9jG4xuTk X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDE3MDE0NiBTYWx0ZWRfX5wGellE1rfaC 4zgz6JYnq6x5YfoPFAgOYnx1SxxxC8Bgqk5cZhBvDeN+ILxVCPm5dTiVJLodLHk+9cFC6IL6vtM EF3JWHzJTtuubBKVFRgAQegEBbdtmjihOIfh93RLJHu/yaYI2FpgY5nu+E8z1Fc8wBiQX7iX4oT Crz+nUFPszrXtE1aECJiFSwjrm03DkS/qWDAX6HmMEVOSO0zi5yV+vkQnRTUe+dFVDj1JTrtVgV afnhXahv+dy3Ab+JcZmGZs2ZsDS913lADhoEHH+opMju6CkRvrXHrKDZgI6amYd03bXE0sPpQLI TQIpH/0i1O+vPERCZCWM2kWvLpVjeXvKoa8//VkoyKhtkAQClJikX0Y4qaPPmWmrSgbKgbobL8X TDHiJb21gNm6zm+S3ld2cIWJV5iHNskgnYab16sq1Bo/5mH8CqygqCcQLTPaAZkUeBXE7AL37P6 JTavZsPkInaLHlDfs6Q== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-04-17_01,2026-04-17_04,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 impostorscore=0 priorityscore=1501 suspectscore=0 spamscore=0 phishscore=0 clxscore=1015 lowpriorityscore=0 adultscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604070000 definitions=main-2604170146 On 4/14/2026 2:59 PM, Konrad Dybcio wrote: > On 4/14/26 7:00 AM, Vishnu Reddy wrote: >> On Glymur, firmware interprets the value written to CPU_CS_SCIACMDARG3 as >> the number of virtual machines (VMs) and internally adds 1 to it. Writing >> 1 causes firmware to treat it as 2 VMs. Since only one VM is required, >> remove this write to leave the register at its reset value of 0. This does >> not affect other platforms as only Glymur firmware uses this register, >> earlier platform firmwares ignore it. > Should we write a zero there, then? zero being the reset value for that register, I would prefer avoiding to write unless needed. Thanks, Vishnu Reddy. > Konrad