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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-65bad3e38f5sm4749119a12.19.2026.02.20.05.02.04 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 20 Feb 2026 05:02:05 -0800 (PST) Message-ID: <7dddf37b-c8f9-4cc2-bd3f-1bff5cc398d1@oss.qualcomm.com> Date: Fri, 20 Feb 2026 14:02:03 +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 v2] arm64: dts: qcom: hamoa/x1: fix idle exit latency To: Daniel J Blueman , Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Maulik Shah Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, stable@kernel.org References: <20260220124626.8611-1-daniel@quora.org> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20260220124626.8611-1-daniel@quora.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Authority-Analysis: v=2.4 cv=Raedyltv c=1 sm=1 tr=0 ts=69985b51 cx=c_pps a=wURt19dY5n+H4uQbQt9s7g==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=HzLeVaNsDn8A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=Mpw57Om8IfrbqaoTuvik:22 a=GgsMoib0sEa3-_RKJdDe:22 a=t9ty7G3lAAAA:8 a=EUspDBNiAAAA:8 a=VwQbUJbxAAAA:8 a=Wy8xLuAV8_BPkXRswWEA:9 a=NqO74GWdXPXpGKcKHaDJD/ajO6k=:19 a=QEXdDO2ut3YA:10 a=-UhsvdU3ccFDOXFxFb4l:22 a=CsAS6f0m0zARWR-uHzm3:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMjIwMDExMyBTYWx0ZWRfXxvQklmApWF5H z4jYv5bvJMAegLbv616KEx9/AZRaHvjs5QlmDjeyT83EaL0ghsJwlH/fuyP3/z3acFSjKGJo7QP nORIELRLzziLYemrIwxQy0R2VwwH/IKgKRI2hy5YHr10VxU5fHeDpZtsxxYEul/CZU8BE3TWY5w fgCf0V4kBrBFz9MAoPlqQZOg1u36SXeUmP+7qeap5qjkIkA2ytWwtN7jQEv7gdzjdjDDZvq/2my q9bPwaZgv6rxIQtkwh1urKJc7sLxqTrAfowIWExeSR6oGYPKwhqeQI+n7jhm+jeks6c/2oizLT2 y/yIqHm69Umq2+OIXDu0AVXfHSZTEai2V7O8VQswztFGvWtboDhT/qd49L8+XWyO+zSf4uY8/+R tcYp3vHgaC/Pxs31oWuXwxMtKVTqp75/aE9moRtYhMNnQCnIjCA+dJSZG2vHtON5UV3HgCTTw8k ScE+kEG7v98ugl4vFlQ== X-Proofpoint-GUID: sM_a395z3mG9sYdp1JP7EZBMS2mPnWgn X-Proofpoint-ORIG-GUID: sM_a395z3mG9sYdp1JP7EZBMS2mPnWgn X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-02-20_01,2026-02-20_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 lowpriorityscore=0 spamscore=0 phishscore=0 bulkscore=0 clxscore=1015 suspectscore=0 impostorscore=0 malwarescore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2601150000 definitions=main-2602200113 On 2/20/26 1:44 PM, Daniel J Blueman wrote: > Designs based on the Qualcomm X1 Hamoa reference platform report: > driver: Idle state 1 target residency too low > > This is because the declared X1 idle entry plus exit latency of 680us > exceeds the declared minimum 600us residency time: > entry-latency-us = <180>; > exit-latency-us = <500>; > min-residency-us = <600>; > > Fix this to be 320us so the sum of the entry and exit latencies matches > the downstream 500us exit latency, as directed by Maulik. > > Tested on a Lenovo Yoga Slim 7x with Qualcomm X1E-80-100. > > Fixes: 2e65616ef07f ("arm64: dts: qcom: x1e80100: Update C4/C5 residency/exit numbers") > Signed-off-by: Daniel J Blueman > --- Reviewed-by: Konrad Dybcio Cc: stable@vger.kernel.org Konrad