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Wed, 25 Mar 2026 08:14:46 -0700 (PDT) X-Received: by 2002:a05:6a00:4147:b0:829:803e:678b with SMTP id d2e1a72fcca58-82c6e1039c5mr3965989b3a.54.1774451685929; Wed, 25 Mar 2026 08:14:45 -0700 (PDT) Received: from [10.204.101.77] ([202.46.23.25]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-82c7d1e619esm68019b3a.9.2026.03.25.08.14.39 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 25 Mar 2026 08:14:45 -0700 (PDT) Message-ID: <7dbf7a23-7a02-4e9e-99c8-6716e3dcf7d9@oss.qualcomm.com> Date: Wed, 25 Mar 2026 20:44:37 +0530 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 2/7] media: iris: switch to hardware mode after firmware boot To: Dikshita Agarwal , Abhinav Kumar , Bryan O'Donoghue , Mauro Carvalho Chehab , Rob Herring , Krzysztof Kozlowski , Dmitry Baryshkov , Conor Dooley , Saravana Kannan , Joerg Roedel , Will Deacon , Robin Murphy , Stefan Schmidt , Hans Verkuil , Krzysztof Kozlowski , Vishnu Reddy , Hans Verkuil Cc: linux-arm-msm@vger.kernel.org, linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, iommu@lists.linux.dev, Bryan O'Donoghue References: <20260313-kaanapali-iris-v3-0-9c0d1a67af4b@oss.qualcomm.com> <20260313-kaanapali-iris-v3-2-9c0d1a67af4b@oss.qualcomm.com> Content-Language: en-US From: Vikash Garodia In-Reply-To: <20260313-kaanapali-iris-v3-2-9c0d1a67af4b@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Proofpoint-ORIG-GUID: 4rHMFhujB--ImVOv49EL7p2I-Z_zCUGe X-Authority-Analysis: v=2.4 cv=F4lat6hN c=1 sm=1 tr=0 ts=69c3fbe7 cx=c_pps a=rEQLjTOiSrHUhVqRoksmgQ==:117 a=ZePRamnt/+rB5gQjfz0u9A==:17 a=IkcTkHD0fZMA:10 a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yOCtJkima9RkubShWh1s:22 a=EUspDBNiAAAA:8 a=dE1MpONsbtOZy1RxgbwA:9 a=QEXdDO2ut3YA:10 a=2VI0MkxyNR6bbpdq8BZq:22 X-Proofpoint-GUID: 4rHMFhujB--ImVOv49EL7p2I-Z_zCUGe X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzI1MDEwOSBTYWx0ZWRfXwXj8VlkKzkKo /6fZYWZki0+fsDC1RTPapsW3tBof8KcDqgzEfHy3dK+KGWDIivEJtfqJnIJfbXC/neYITu+F6T5 OctxpokQfnCRkxf+7Gw4guh5Bs5Ox5kUT1Aq/Zjfn9yRJTiGJBOwkrorIhwtEWvX5BXEiyrqywo 2q0ch04Mbo3Mhefm48M4v6ZYwjzg0DE+/MOY0oBLtyRFnA1lMPGjuXEdjLtsCNZV1Agr0OpYd1K oOAUA4Krv1Zkxt7MQ8Esk0thOIzVaw2x8/3lC6EmldKFo0pkNZjVL9yfoWcp5Yxb4Hmo+na1z/s QKyoKa1WvpNjSu8TAGaPNjRjO31siNKsUM0yALZmk6z3E1KNZuNouK9mKEkm8d7Jcyv3t87ovf1 S5Ed95Rnhm7gbioTC7VXFCCyRAQRD7MBf8xC75fGZk0haN8kpi9O+iCsc7F7Jbx8qnAi8/aLbRf Ih5XgKsVf1Nav9lOdlg== 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=2026-03-25_04,2026-03-24_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 lowpriorityscore=0 priorityscore=1501 bulkscore=0 adultscore=0 malwarescore=0 clxscore=1015 suspectscore=0 impostorscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2603250109 On 3/13/2026 6:49 PM, Vikash Garodia wrote: > Currently the driver switches the vcodec GDSC to hardware (HW) mode > before firmware load and boot sequence. GDSC can be powered off, keeping > in hw mode, thereby the vcodec registers programmed in TrustZone (TZ) > carry default (reset) values. > Move the transition to HW mode after firmware load and boot sequence. > > The bug was exposed with driver configuring different stream ids to > different devices via iommu-map. With registers carrying reset values, > VPU would not generate desired stream-id, thereby leading to SMMU fault. > > For vpu4, when GDSC is switched to HW mode, there is a need to perform > the reset operation. Without reset, there are occassional issues of > register corruption observed. Hence the vpu GDSC switch also involves > the reset. > > Fixes: dde659d37036 ("media: iris: Introduce vpu ops for vpu4 with necessary hooks") > Co-developed-by: Vishnu Reddy > Signed-off-by: Vishnu Reddy > Signed-off-by: Vikash Garodia > --- Hi Bryan, Please pull this fix patch, let me know if you need me to resend this separately. Regards, Vikash