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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b8056ff4925sm590671266b.31.2025.12.22.01.26.35 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 22 Dec 2025 01:26:36 -0800 (PST) Message-ID: Date: Mon, 22 Dec 2025 10:26:34 +0100 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 1/2] Revert "drm/msm/dpu: support plane splitting in quad-pipe case" To: Marijn Suijten , Abel Vesa Cc: Rob Clark , Dmitry Baryshkov , Abhinav Kumar , Jessica Zhang , Sean Paul , David Airlie , Simona Vetter , Jun Nie , linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org References: <20251219-drm-msm-dpu-revert-quad-pipe-broken-v1-0-654b46505f84@oss.qualcomm.com> <20251219-drm-msm-dpu-revert-quad-pipe-broken-v1-1-654b46505f84@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Authority-Analysis: v=2.4 cv=SIhPlevH c=1 sm=1 tr=0 ts=69490ece cx=c_pps a=JbAStetqSzwMeJznSMzCyw==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=wP3pNCr1ah4A:10 a=s4-Qcg_JpJYA:10 a=sWKEhP36mHoA:10 a=VkNPw1HP01LnGYTKEx00:22 a=cD7NnaPcIOXBppSYsfEA:9 a=QEXdDO2ut3YA:10 a=uxP6HrT_eTzRwkO_Te1X:22 X-Proofpoint-ORIG-GUID: _wK2eIngqO3OxzftfhN_C9MC44pcKqQf X-Proofpoint-GUID: _wK2eIngqO3OxzftfhN_C9MC44pcKqQf X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMjIyMDA4NSBTYWx0ZWRfX2F2/vDPCHK3M UTAhP28Ze1e6VMvUT6NyYrFZbgaFGT2GhkAzZDIj9GbNm2/xb6aD/Rdjjw/y3JJOTbdZBy+XeRx KgUh/o9XzjO7ASAykCr3yVED31ouhJ4jNN2VOASkfKtQHph/ApqP0UVOU2XemLWh8LAaU7ht0ZN dLaW/Wpgo1lhIYfMPO0SuO9fgnXEFk06MU9spKLPJ13EgUfa69xZ6NoU8jP6IHnScpxaaFzb0gG 300IV065tHzkuHdjhwJl2ipry8wWTcv1/q+iTZgxw1J6nwPK3ZylkgLr3s0bRSS1hNTs9fMiVS1 0nOwE148edXtUeErbC53h6nPKUlvKxh/Nc9D+vCuqT32EWpxdMWjpHpJRJgqz+wq5BrbLrPwybj 6H7dFUDk/Efa9l+0mz6BfPvxmkrJW05egoYe0pTQzUD17AVnHJSUwSz9GziOsT9Q3+ueLO8jKJw Bs4X+RVVOSf2fSBvq5w== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-12-21_05,2025-12-19_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 priorityscore=1501 impostorscore=0 bulkscore=0 adultscore=0 phishscore=0 spamscore=0 suspectscore=0 clxscore=1015 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2512120000 definitions=main-2512220085 On 12/19/25 8:55 PM, Marijn Suijten wrote: > On 2025-12-19 12:39:01, Abel Vesa wrote: >> This reverts commit 5978864e34b66bdae4d7613834c03dd5d0a0c891. >> >> At least on Hamoa based devices, there are IOMMU faults: >> >> arm-smmu 15000000.iommu: Unhandled context fault: fsr=0x402, iova=0x00000000, fsynr=0x3d0023, cbfrsynra=0x1c00, cb=13 >> arm-smmu 15000000.iommu: FSR = 00000402 [Format=2 TF], SID=0x1c00 >> arm-smmu 15000000.iommu: FSYNR0 = 003d0023 [S1CBNDX=61 PNU PLVL=3] > > I thought that this was normal, and that I was always seeing these on startup > (something to do with framebuffer), but indeed by reverting this patch these > are gone on at least the Xperia XZ2 (regular CMD-mode panel) and XZ3 (CMD-mode > panel, 2:2:1 DSC-merge topology), both sdm845-based phones. This is very close to what you've seen, but note this one comes with iova = 0, meaning we're likely passing some garbage somewhere Konrad