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Fri, 20 Feb 2026 04:47:00 -0800 (PST) Received: from aegis ([2001:fd8:f657:5202:d49c:c900:af62:5f3c]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2ad1aafb972sm179431235ad.88.2026.02.20.04.46.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 20 Feb 2026 04:47:00 -0800 (PST) From: Daniel J Blueman To: 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, Daniel J Blueman Subject: [PATCH v2] arm64: dts: qcom: hamoa/x1: fix idle exit latency Date: Fri, 20 Feb 2026 20:44:58 +0800 Message-ID: <20260220124626.8611-1-daniel@quora.org> X-Mailer: git-send-email 2.51.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 =3D <180>; exit-latency-us =3D <500>; min-residency-us =3D <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/ex= it numbers") Signed-off-by: Daniel J Blueman Reviewed-by: Konrad Dybcio --- Changelog: v2: - update exit latency v1: https://lore.kernel.org/all/20260220070204.101672-1-daniel@quora.org/ --- arch/arm64/boot/dts/qcom/hamoa.dtsi | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/boot/dts/qcom/hamoa.dtsi b/arch/arm64/boot/dts/qcom= /hamoa.dtsi index a17900eacb20..b870f4dc9c42 100644 --- a/arch/arm64/boot/dts/qcom/hamoa.dtsi +++ b/arch/arm64/boot/dts/qcom/hamoa.dtsi @@ -269,7 +269,7 @@ cluster_c4: cpu-sleep-0 { idle-state-name =3D "ret"; arm,psci-suspend-param =3D <0x00000004>; entry-latency-us =3D <180>; - exit-latency-us =3D <500>; + exit-latency-us =3D <320>; min-residency-us =3D <600>; }; }; --=20 2.51.0