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Mon, 15 Jan 2024 10:32:32 -0800 (PST) Received: from [192.168.1.20] ([178.197.215.66]) by smtp.gmail.com with ESMTPSA id gu18-20020a170906f29200b00a28aba1f56fsm5561182ejb.210.2024.01.15.10.32.31 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 15 Jan 2024 10:32:32 -0800 (PST) Message-ID: <3bb632e4-67ad-43d8-9b7f-6e55880b0bd7@linaro.org> Date: Mon, 15 Jan 2024 19:32:30 +0100 Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] interconnect: qcom: sm8450: Revert "interconnect: qcom: sm8450: Enable sync_state" To: Konrad Dybcio , Georgi Djakov , Bjorn Andersson , Vinod Koul , linux-arm-msm@vger.kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: stable@vger.kernel.org References: <20240115153420.1525037-1-krzysztof.kozlowski@linaro.org> <201733c1-dc24-4d77-9967-f52c8e81d35b@kernel.org> <96928df4-75ca-4a55-829b-b8ab0583e3b5@linaro.org> <93bc06a3-8af9-4d50-bfee-d54e04bade51@linaro.org> Content-Language: en-US From: Krzysztof Kozlowski Autocrypt: addr=krzysztof.kozlowski@linaro.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 15/01/2024 19:17, Konrad Dybcio wrote: > On 15.01.2024 18:59, Krzysztof Kozlowski wrote: >> On 15/01/2024 17:44, Georgi Djakov wrote: >>> On 15.01.24 17:34, Krzysztof Kozlowski wrote: >>>> Revert commit 16862f1b2110 ("interconnect: qcom: sm8450: Enable >>>> sync_state"), because it causes serial console to corrupt, later freeze >>>> and become either entirely corrupted or only print without accepting any >>>> input. >>> >>> Sounds like some driver is not requesting bandwidth and is relying on >>> bandwidth requests made by other drivers. Maybe we are missing some >>> "interconnects" property in DT? >> >> Yes, the debug UART (console) misses the interconnects. They could be >> added but it does not change the fact that console is broken since v6.6 >> and this was probably never tested on actual hardware :/ > > This patch? I definitely tested it out on a headless remote board.. OK, then maybe something changed between your tests and when it was applied? Anyway issue is reproducible 100%. Even older kernel (v6.5) with your commit cherry-picked fails. Best regards, Krzysztof