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Thu, 18 Jun 2026 02:04:36 -0700 (PDT) X-Received: by 2002:a05:620a:444f:b0:915:8197:4490 with SMTP id af79cd13be357-91f2a9c3693mr258564685a.4.1781773475902; Thu, 18 Jun 2026 02:04:35 -0700 (PDT) Received: from [192.168.120.170] ([178.235.128.140]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-c0765b69d6esm80087266b.18.2026.06.18.02.04.33 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 18 Jun 2026 02:04:34 -0700 (PDT) Message-ID: <7ac67f89-c6b4-4e0c-8eec-1e5c757777ce@oss.qualcomm.com> Date: Thu, 18 Jun 2026 11:04:32 +0200 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 0/6] arm64: dts: qcom: sc8280xp: set GPI DMA channels according to DSDT To: Icenowy Zheng , Pengyu Luo Cc: Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260602081451.3808833-1-zhengxingda@iscas.ac.cn> <178040480680.1778078.1165164069560552075.b4-review@b4> <178073773007.397244.9871455646149843167.b4-reply@b4> <7ecda3d0f91b0d96bcec44ddf485ed5146788220.camel@iscas.ac.cn> <178073918523.417326.15121723011916371966.b4-reply@b4> <1c33b1dd7d187b17b21b17339a4f1990e59d2f77.camel@iscas.ac.cn> <12a8cc4f-3c45-471b-8a0c-f7473cefa190@oss.qualcomm.com> <926a0fe9224d73e0f5e3f58f3769c6247b1cabd4.camel@iscas.ac.cn> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <926a0fe9224d73e0f5e3f58f3769c6247b1cabd4.camel@iscas.ac.cn> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNjE4MDA4MiBTYWx0ZWRfX3Y26bLYaeuD+ RFiOCKoJi+foEFy6Tcmq+iqgzkQUjJ9tN7grcLctW6y0MYGD+6ZhrFtGIgf/mVnWdwAs6wmaR39 FoUb9hV8YpEPKTK5HbrwzDbanyGfEy+rN4eYMArbpKvOUcg/eKaAAMv+R0a6Y7WCqPD8eK5SMRP nQZyTwmLmefpPjwOJKFilnsbH5LYk/r4hcVZXZMEFntFAUsk2Ye2aEBvkRa4WgJbR+PVgfTNUKq Pb+eYFkHD5WAQluS3AK5ItVXAF0kM7sg8/Nqbt3E7JRmxr1HrUvaTxPdWCXlUfvbfeTuapAbxeO 5xz3qKamq03hK8pKO5nyA2iYPTqWRXLRjFRUFlNGkHm3+7wIBmUtMlBKlIRq6Ln9UPB3Who9XiN IzsLdC/cobqG1CqY390/P6BWLmOxK4gRdHJ6CZddHh0k1fshEmeT/6rEZijjHR/4DmlctLT96wK LoaT5pUlI6T1iXroMWQ== X-Proofpoint-ORIG-GUID: EKWUknsHqp6KUWi9M1SN5vF9jnv6Fm9g X-Authority-Analysis: v=2.4 cv=FN4rAeos c=1 sm=1 tr=0 ts=6a33b4a5 cx=c_pps a=qKBjSQ1v91RyAK45QCPf5w==:117 a=PRfkaYvzSr8QmIIGAkY2Sg==:17 a=IkcTkHD0fZMA:10 a=FelO9ux0wxsA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=DJpcGTmdVt4CTyJn9g5Z:22 a=fGO4tVQLAAAA:8 a=ZjbuNi-wRcj-E7w4fbIA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=NFOGd7dJGGMPyQGDc5-O:22 X-Proofpoint-GUID: EKWUknsHqp6KUWi9M1SN5vF9jnv6Fm9g X-Proofpoint-Spam-Info: AW1haW4tMjYwNjE4MDA4MiBTYWx0ZWRfX9ZyU9uiAfO70 RqabluwcTILPDTxTokJomkdI9g/8qE4pFzOBRHOhDti2fGOkq2VJK41JR35aElf+AaCClWS6oMO XduPfjp+l8orFr0QWnvyTlgVIQl10rk= X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-06-18_01,2026-06-17_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 bulkscore=0 lowpriorityscore=0 impostorscore=0 adultscore=0 phishscore=0 suspectscore=0 clxscore=1015 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2606180082 On 6/9/26 5:54 PM, Icenowy Zheng wrote: > 在 2026-06-09二的 14:23 +0200，Konrad Dybcio写道： >> On 6/7/26 10:49 AM, Icenowy Zheng wrote: >>> 在 2026-06-06六的 21:51 +0800，Pengyu Luo写道： >>>> On Sat, Jun 6, 2026 at 9:21 PM Icenowy Zheng >>>> wrote: >>>>> >>>>> 在 2026-06-06六的 17:46 +0800，Pengyu Luo写道： >>>>>> On 2026-06-06 17:28:35+08:00, Icenowy Zheng wrote: >>>>>>> 在 2026-06-06六的 17:22 +0800，Pengyu Luo写道： >>>>>>> >>>>>>>> On 2026-06-02 21:21:27+08:00, Icenowy Zheng wrote: >>>>>>>> >>>>>>>> The magnetic keyboard (USB HID) can't be connected >>>>>>>> somehow, >>>>>>>> others >>>>>>>> are >>>>>>>> fine, such as the spi touchscreen (not upstream yet), >>>>>>>> which >>>>>>>> utilizes >>>>>>>> DMA definitely. My config is here >>>>>>>> https://pastebin.com/SdjuyJYk >>>>>>> >>>>>>> Is this a defconfig? >>>>>>> >>>>>> >>>>>> Yes. >>>>>> >>>>>>> BTW it seems that CONFIG_ASYNC_TX_DMA needs to be selected >>>>>>> too >>>>>>> for >>>>>>> exhibiting the problem (because there should be "public" >>>>>>> GPI >>>>>>> DMA >>>>>>> consumers to trigger the stuck/reset). >>>>>>> >>>>>> >>>>>> Is this still necessary? I checked the fedora discussion and >>>>>> your >>>>>> GPI >>>>>> DMA fix. And GPI DMA is only for the QUP-supported >>>>>> peripherals as >>>>>> the >>>>>> binding mentioned, devicetree/bindings/dma/qcom,gpi.yaml >>>>> >>>>> The devicetree without this fix seems to be still incorrect, >>>>> because >>>>> with the device tree fix even if the GPI DMA driver misbehaves >>>>> the >>>>> system won't be stuck (although it will iterate all GPI >>>>> channels >>>>> and >>>>> then fail to function at all). >>>>> >>>> >>>> Back to the start. You said some GPI interfaces aren't available >>>> to >>>> HLOS, your mask is 0xb(0b1011), so I use 0x4(0b100) did a quick >>>> test, >>>> and spi6 consumed it, no stuck or reset. Could you give me a >>>> unavailable channel? >>> >>> I think channel 0b10000 of gpi_dma2 could be an example? >>> >>> It seems that 4 channels are tried on gpi_dma2 before hang on my >>> gaokun3, but as gaokun3 has no known serial access, it's possible >>> that >>> 0b100000 or 0b1000 is problematic. >>> >>> (The reason gpi_dma2 is checked first is because it's the GPI DMA >>> controller with the smallest address) >>> >>> BTW I just took the values from Windows DSDT, which is quite >>> conservative. >> >> So, with DMA_PRIVATE set, is this series made redundant? > > I assume technically the trustzone is still protecting some channels, > although the system stuck issue is fixed. > > This series should still be relevant, although not so emergent. So now we're down to the case of the TZ reserving some of the GPI channels (presumably for locked down/TZ-driven QUPs) crashing the device on access, is that right? Konrad