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Fri, 17 Apr 2026 08:28:50 -0700 (PDT) X-Received: by 2002:a17:90b:3d02:b0:35b:d795:cf5d with SMTP id 98e67ed59e1d1-361401ec4b4mr2683418a91.5.1776439730131; Fri, 17 Apr 2026 08:28:50 -0700 (PDT) Received: from [10.206.105.200] ([202.46.23.25]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3614195a9fbsm3284378a91.11.2026.04.17.08.28.42 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 17 Apr 2026 08:28:49 -0700 (PDT) Message-ID: <7cd1a0ff-53be-7eb7-7de7-420dd1ae7cf4@oss.qualcomm.com> Date: Fri, 17 Apr 2026 20:58:40 +0530 Precedence: bulk X-Mailing-List: linux-media@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: Mukesh Ojha Cc: 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 , 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> <20260414063325.f3yag6gnmaysddkp@hu-mojha-hyd.qualcomm.com> Content-Language: en-US In-Reply-To: <20260414063325.f3yag6gnmaysddkp@hu-mojha-hyd.qualcomm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Authority-Analysis: v=2.4 cv=buR8wkai c=1 sm=1 tr=0 ts=69e251b3 cx=c_pps a=UNFcQwm+pnOIJct1K4W+Mw==:117 a=ZePRamnt/+rB5gQjfz0u9A==:17 a=IkcTkHD0fZMA:10 a=A5OVakUREuEA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_K5XuSEh1TEqbUxoQ0s3:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=5Xy_6AgtP5T3jK3p2aAA:9 a=QEXdDO2ut3YA:10 a=uKXjsCUrEbL0IQVhDsJ9:22 X-Proofpoint-GUID: R4TmGlAGSlfvkwFnTT6Sl6DlqpntKsCF X-Proofpoint-ORIG-GUID: R4TmGlAGSlfvkwFnTT6Sl6DlqpntKsCF X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDE3MDE1NSBTYWx0ZWRfX/NfuOvbAOe2b yMex0/m+BBwA2HCzyxKsPFltYRS+aZ4HTro3aWNNL3gOPtPQJhcerIybYiGtFcO5Ykrdr63UKlS lgVg2o6KsICDbX1kxS/H8LrldgrHl2kml+9cJj6cIqTqp8OcX9TqF8h4CfKAbivyX0dJhqpwAe+ 9ZhCSBcnzclBUvQFVobEzFXmi0c0jo9iSzdAUy19XRxxOHSj8ofLL2qygFZLq+/a5ddCm784sK0 snsuBBuE4r3lFiDNWhulimMwjTZTiplrWQnVdpOTxzpLGyyradh/ubOtav1xR+WBtyi6B7aWaFl +Z66W+JfPHgeO/yJqehyq7ClKA5KmnwTfNVB/9OO6ejvxBLzuKEly3OV+lfOBpHMJtxwehiQ0Xc 5xgC3jbmm88sOVYe8529+pb/RxWdkExjCEJJook+HqXjaGE7j2J+Kyyj+aYtjuiT8Mw3aXnTXmq v8cKa0lZcxfiV8P1mpw== 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 impostorscore=0 adultscore=0 lowpriorityscore=0 suspectscore=0 bulkscore=0 priorityscore=1501 spamscore=0 malwarescore=0 phishscore=0 clxscore=1015 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604070000 definitions=main-2604170155 On 4/14/2026 12:03 PM, Mukesh Ojha wrote: > On Tue, Apr 14, 2026 at 10:30:02AM +0530, 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. >> >> Fixes: abf5bac63f68a ("media: iris: implement the boot sequence of the firmware") >> Cc:stable@vger.kernel.org >> Signed-off-by: Vishnu Reddy > If this is a fix, should be the first patch in the series., so that it > can be applied independently. Ack, I'll move it accordingly. >> --- >> drivers/media/platform/qcom/iris/iris_vpu_common.c | 1 - >> 1 file changed, 1 deletion(-) >> >> diff --git a/drivers/media/platform/qcom/iris/iris_vpu_common.c b/drivers/media/platform/qcom/iris/iris_vpu_common.c >> index 548e5f1727fd..bfd1e762c38e 100644 >> --- a/drivers/media/platform/qcom/iris/iris_vpu_common.c >> +++ b/drivers/media/platform/qcom/iris/iris_vpu_common.c >> @@ -78,7 +78,6 @@ int iris_vpu_boot_firmware(struct iris_core *core) >> iris_vpu_setup_ucregion_memory_map(core); >> >> writel(ctrl_init, core->reg_base + CTRL_INIT); >> - writel(0x1, core->reg_base + CPU_CS_SCIACMDARG3); >> >> while (!ctrl_status && count < max_tries) { >> ctrl_status = readl(core->reg_base + CTRL_STATUS); >> >> -- >> 2.34.1 >>