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Fri, 23 Oct 2026 01:06:28 -0700 (PDT) Received: from [192.168.226.26] ([178.235.128.140]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-c46a5c4d54dsm73770766b.24.2026.10.23.01.06.26 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 23 Oct 2026 01:06:27 -0700 (PDT) Message-ID: Date: Fri, 23 Oct 2026 10:06:25 +0200 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 2/2] iommu/arm-smmu-qcom: Skip PRR setup on SM7250 GPU SMMU To: patches@brar.si, Will Deacon , Robin Murphy , "Joerg Roedel (AMD)" , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Rob Clark Cc: linux-arm-kernel@lists.infradead.org, iommu@lists.linux.dev, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org References: <20261023-smmu-sm7250-v2-0-8bb881ce19f5@brar.si> <20261023-smmu-sm7250-v2-2-8bb881ce19f5@brar.si> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20261023-smmu-sm7250-v2-2-8bb881ce19f5@brar.si> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Info: AW1haW4tMjYxMDIzMDAzMiBTYWx0ZWRfX7ZbnhQMQUE0Z RJPTJp1R4yk7aGhZ6b7fTFgf1xHvUNqFbtp9BN1fG0rSFXutyeTU4H4iAtWZCIdlcIyJbv+beGY 95FnGalw8LLYvcIbosGCbHuaXSCDF7M= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDIzMDAzMiBTYWx0ZWRfX3cjaomtDvtcq Mdqk64PPyx5pcBqgbPPClajWtBGnqw/YMRCZdFyeViTBpDrV6xwJrPB9f7CkrYgmunLMtLH0d9b MqIWYoLlVugsfKMbbY5ykNNz7b1m2xZ9KjJHvQ/wyGOhbGJTyybiX/JDAuXA9pMJqNIi5pt2YXg uJzQFEgee9O3a9UL5xkfkNuRIUx3VwK8VMWnKicVWdUi3rxDmNw6vfNYSk4flkWp2Zh0mNuv+nS RuqUwXhEqwPkUF2QMyDCXn12inZ8VXzTGbtR5OhLvvEhHHWkShR0WZIQVJdj+c3THj/MhyyKE0q ksQZvngN/NCqcfL3Py0B1jyQH15+mmm5SPzLmT/XYWTB14uYM/mZxPoJwWvakZQwqNyeOnxqEZ4 WWjeqcdcgruPI1e5dvcRdf5M1RmESdDMrsYsT1AaTujV2lAsPT21y1PhSlbeoSklYOqvXfZtihG wjAwoW7d29mxEv8cbgw== X-Proofpoint-GUID: 5Nx8hPw2aRwmjqn4ys1iTCxAServrA3o X-Authority-Analysis: v=2.4 cv=YIMKWhGx c=1 sm=1 tr=0 ts=6adb1586 cx=c_pps a=UgVkIMxJMSkC9lv97toC5g==:117 a=PRfkaYvzSr8QmIIGAkY2Sg==:17 a=IkcTkHD0fZMA:10 a=660iZSQnnn4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=ZpdpYltYx_vBUK5n70dp:22 a=EUspDBNiAAAA:8 a=U7Z_fe4AFx8LFHQn5dUA:9 a=QEXdDO2ut3YA:10 a=1HOtulTD9v-eNWfpl4qZ:22 X-Proofpoint-ORIG-GUID: 5Nx8hPw2aRwmjqn4ys1iTCxAServrA3o X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.138,FMLib:17.12.100.49 definitions=2026-10-23_02,2026-10-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 adultscore=0 phishscore=0 lowpriorityscore=0 malwarescore=0 impostorscore=0 bulkscore=0 suspectscore=0 clxscore=1015 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610190000 definitions=main-2610230032 On 10/23/26 9:54 AM, Ishu Brar via B4 Relay wrote: > From: Ishu Brar > > As on SM8250, the firmware on SM7250 resets the device when the Adreno > SMMU PRR registers are written. This happened as soon as the first > per-process GPU pagetable was created. Do not install the PRR > callbacks for the SM7250 GPU SMMU either. > > Tested on a OnePlus Nord (SM7250) with Vulkan. > > Signed-off-by: Ishu Brar > --- Acked-by: Konrad Dybcio Konrad