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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-abed1d6b153sm143635766b.73.2025.02.25.05.38.54 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 25 Feb 2025 05:38:55 -0800 (PST) Message-ID: <3956606b-71de-4c71-afb0-c4918888db19@oss.qualcomm.com> Date: Tue, 25 Feb 2025 14:38:53 +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] arm64: dts: qcom: sdm850-lenovo-yoga-c630: make SMMU non-DMA-coherent To: Dmitry Baryshkov , Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: Konrad Dybcio , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org References: <20250215-yoga-dma-coherent-v1-1-2419ee184a81@linaro.org> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20250215-yoga-dma-coherent-v1-1-2419ee184a81@linaro.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-GUID: FHf7hTXtFgAXYby5ntnH6XJj74KfKZqQ X-Proofpoint-ORIG-GUID: FHf7hTXtFgAXYby5ntnH6XJj74KfKZqQ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1057,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-02-25_04,2025-02-25_03,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 bulkscore=0 phishscore=0 impostorscore=0 malwarescore=0 adultscore=0 spamscore=0 priorityscore=1501 mlxlogscore=766 lowpriorityscore=0 suspectscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2502100000 definitions=main-2502250094 On 15.02.2025 3:43 AM, Dmitry Baryshkov wrote: > The commit 6b31a9744b87 ("arm64: dts: qcom: sdm845: Affirm IDR0.CCTW on > apps_smmu") enabled dma-coherent property for the IOMMU device. This > works for some devices, like Qualcomm RB3 platform, but at the same time > it breaks booting on Lenovo Yoga C630 (most likely because of some TZ > differences). Disable DMA coherency for IOMMU on Lenove Yoga C630. > > Fixes: 6b31a9744b87 ("arm64: dts: qcom: sdm845: Affirm IDR0.CCTW on apps_smmu") > Cc: stable@vger.kernel.org > Signed-off-by: Dmitry Baryshkov > --- Let's revert the offending commit instead, this must have been some sort of fw development fluke.. Konrad