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charset="utf-8" Add the aspm-l1-entry-delay-ns device tree property to all PCIe Root Port and PCIe Endpoint nodes in tegra194.dtsi and tegra234.dtsi so that ASPM L1 entrance latency is configured from device tree. - Tegra194: 4000 ns (4 us) for both Root Port and Endpoint. - Tegra234: 8000 ns (8 us) for Root Port, 16000 ns (16 us) for Endpoint. Signed-off-by: Manikanta Maddireddy --- V8: New patch arch/arm64/boot/dts/nvidia/tegra194.dtsi | 9 +++++++++ arch/arm64/boot/dts/nvidia/tegra234.dtsi | 16 ++++++++++++++++ 2 files changed, 25 insertions(+) diff --git a/arch/arm64/boot/dts/nvidia/tegra194.dtsi b/arch/arm64/boot/dts= /nvidia/tegra194.dtsi index 849694f751d9..1d659454a6f9 100644 --- a/arch/arm64/boot/dts/nvidia/tegra194.dtsi +++ b/arch/arm64/boot/dts/nvidia/tegra194.dtsi @@ -2382,6 +2382,7 @@ pcie@14100000 { nvidia,aspm-cmrt-us =3D <60>; nvidia,aspm-pwr-on-t-us =3D <20>; nvidia,aspm-l0s-entrance-latency-us =3D <3>; + aspm-l1-entry-delay-ns =3D <4000>; =20 bus-range =3D <0x0 0xff>; =20 @@ -2434,6 +2435,7 @@ pcie@14120000 { nvidia,aspm-cmrt-us =3D <60>; nvidia,aspm-pwr-on-t-us =3D <20>; nvidia,aspm-l0s-entrance-latency-us =3D <3>; + aspm-l1-entry-delay-ns =3D <4000>; =20 bus-range =3D <0x0 0xff>; =20 @@ -2486,6 +2488,7 @@ pcie@14140000 { nvidia,aspm-cmrt-us =3D <60>; nvidia,aspm-pwr-on-t-us =3D <20>; nvidia,aspm-l0s-entrance-latency-us =3D <3>; + aspm-l1-entry-delay-ns =3D <4000>; =20 bus-range =3D <0x0 0xff>; =20 @@ -2538,6 +2541,7 @@ pcie@14160000 { nvidia,aspm-cmrt-us =3D <60>; nvidia,aspm-pwr-on-t-us =3D <20>; nvidia,aspm-l0s-entrance-latency-us =3D <3>; + aspm-l1-entry-delay-ns =3D <4000>; =20 bus-range =3D <0x0 0xff>; =20 @@ -2583,6 +2587,7 @@ pcie-ep@14160000 { nvidia,aspm-cmrt-us =3D <60>; nvidia,aspm-pwr-on-t-us =3D <20>; nvidia,aspm-l0s-entrance-latency-us =3D <3>; + aspm-l1-entry-delay-ns =3D <4000>; =20 interconnects =3D <&mc TEGRA194_MEMORY_CLIENT_PCIE4R &emc>, <&mc TEGRA194_MEMORY_CLIENT_PCIE4W &emc>; @@ -2629,6 +2634,7 @@ pcie@14180000 { nvidia,aspm-cmrt-us =3D <60>; nvidia,aspm-pwr-on-t-us =3D <20>; nvidia,aspm-l0s-entrance-latency-us =3D <3>; + aspm-l1-entry-delay-ns =3D <4000>; =20 bus-range =3D <0x0 0xff>; =20 @@ -2674,6 +2680,7 @@ pcie-ep@14180000 { nvidia,aspm-cmrt-us =3D <60>; nvidia,aspm-pwr-on-t-us =3D <20>; nvidia,aspm-l0s-entrance-latency-us =3D <3>; + aspm-l1-entry-delay-ns =3D <4000>; =20 interconnects =3D <&mc TEGRA194_MEMORY_CLIENT_PCIE0R &emc>, <&mc TEGRA194_MEMORY_CLIENT_PCIE0W &emc>; @@ -2723,6 +2730,7 @@ pcie@141a0000 { nvidia,aspm-cmrt-us =3D <60>; nvidia,aspm-pwr-on-t-us =3D <20>; nvidia,aspm-l0s-entrance-latency-us =3D <3>; + aspm-l1-entry-delay-ns =3D <4000>; =20 bus-range =3D <0x0 0xff>; =20 @@ -2771,6 +2779,7 @@ pcie-ep@141a0000 { nvidia,aspm-cmrt-us =3D <60>; nvidia,aspm-pwr-on-t-us =3D <20>; nvidia,aspm-l0s-entrance-latency-us =3D <3>; + aspm-l1-entry-delay-ns =3D <4000>; =20 interconnects =3D <&mc TEGRA194_MEMORY_CLIENT_PCIE5R &emc>, <&mc TEGRA194_MEMORY_CLIENT_PCIE5W &emc>; diff --git a/arch/arm64/boot/dts/nvidia/tegra234.dtsi b/arch/arm64/boot/dts= /nvidia/tegra234.dtsi index 850c473235e3..850c1a645d71 100644 --- a/arch/arm64/boot/dts/nvidia/tegra234.dtsi +++ b/arch/arm64/boot/dts/nvidia/tegra234.dtsi @@ -4532,6 +4532,7 @@ pcie@140a0000 { nvidia,aspm-cmrt-us =3D <60>; nvidia,aspm-pwr-on-t-us =3D <20>; nvidia,aspm-l0s-entrance-latency-us =3D <3>; + aspm-l1-entry-delay-ns =3D <8000>; =20 bus-range =3D <0x0 0xff>; =20 @@ -4586,6 +4587,7 @@ pcie@140c0000 { nvidia,aspm-cmrt-us =3D <60>; nvidia,aspm-pwr-on-t-us =3D <20>; nvidia,aspm-l0s-entrance-latency-us =3D <3>; + aspm-l1-entry-delay-ns =3D <8000>; =20 bus-range =3D <0x0 0xff>; =20 @@ -4640,6 +4642,7 @@ pcie@140e0000 { nvidia,aspm-cmrt-us =3D <60>; nvidia,aspm-pwr-on-t-us =3D <20>; nvidia,aspm-l0s-entrance-latency-us =3D <3>; + aspm-l1-entry-delay-ns =3D <8000>; =20 bus-range =3D <0x0 0xff>; =20 @@ -4686,6 +4689,7 @@ pcie-ep@140e0000 { nvidia,aspm-cmrt-us =3D <60>; nvidia,aspm-pwr-on-t-us =3D <20>; nvidia,aspm-l0s-entrance-latency-us =3D <3>; + aspm-l1-entry-delay-ns =3D <16000>; =20 interconnects =3D <&mc TEGRA234_MEMORY_CLIENT_PCIE10AR &emc>, <&mc TEGRA234_MEMORY_CLIENT_PCIE10AW &emc>; @@ -4734,6 +4738,7 @@ pcie@14100000 { nvidia,aspm-cmrt-us =3D <60>; nvidia,aspm-pwr-on-t-us =3D <20>; nvidia,aspm-l0s-entrance-latency-us =3D <3>; + aspm-l1-entry-delay-ns =3D <8000>; =20 bus-range =3D <0x0 0xff>; =20 @@ -4788,6 +4793,7 @@ pcie@14120000 { nvidia,aspm-cmrt-us =3D <60>; nvidia,aspm-pwr-on-t-us =3D <20>; nvidia,aspm-l0s-entrance-latency-us =3D <3>; + aspm-l1-entry-delay-ns =3D <8000>; =20 bus-range =3D <0x0 0xff>; =20 @@ -4842,6 +4848,7 @@ pcie@14140000 { nvidia,aspm-cmrt-us =3D <60>; nvidia,aspm-pwr-on-t-us =3D <20>; nvidia,aspm-l0s-entrance-latency-us =3D <3>; + aspm-l1-entry-delay-ns =3D <8000>; =20 bus-range =3D <0x0 0xff>; =20 @@ -4896,6 +4903,7 @@ pcie@14160000 { nvidia,aspm-cmrt-us =3D <60>; nvidia,aspm-pwr-on-t-us =3D <20>; nvidia,aspm-l0s-entrance-latency-us =3D <3>; + aspm-l1-entry-delay-ns =3D <8000>; =20 bus-range =3D <0x0 0xff>; =20 @@ -4937,6 +4945,7 @@ pcie-ep@14160000 { nvidia,aspm-cmrt-us =3D <60>; nvidia,aspm-pwr-on-t-us =3D <20>; nvidia,aspm-l0s-entrance-latency-us =3D <3>; + aspm-l1-entry-delay-ns =3D <16000>; =20 interconnects =3D <&mc TEGRA234_MEMORY_CLIENT_PCIE4R &emc>, <&mc TEGRA234_MEMORY_CLIENT_PCIE4W &emc>; @@ -4983,6 +4992,7 @@ pcie@14180000 { nvidia,aspm-cmrt-us =3D <60>; nvidia,aspm-pwr-on-t-us =3D <20>; nvidia,aspm-l0s-entrance-latency-us =3D <3>; + aspm-l1-entry-delay-ns =3D <8000>; =20 bus-range =3D <0x0 0xff>; =20 @@ -5037,6 +5047,7 @@ pcie@141a0000 { nvidia,aspm-cmrt-us =3D <60>; nvidia,aspm-pwr-on-t-us =3D <20>; nvidia,aspm-l0s-entrance-latency-us =3D <3>; + aspm-l1-entry-delay-ns =3D <8000>; =20 bus-range =3D <0x0 0xff>; =20 @@ -5083,6 +5094,7 @@ pcie-ep@141a0000 { nvidia,aspm-cmrt-us =3D <60>; nvidia,aspm-pwr-on-t-us =3D <20>; nvidia,aspm-l0s-entrance-latency-us =3D <3>; + aspm-l1-entry-delay-ns =3D <16000>; =20 interconnects =3D <&mc TEGRA234_MEMORY_CLIENT_PCIE5R &emc>, <&mc TEGRA234_MEMORY_CLIENT_PCIE5W &emc>; @@ -5131,6 +5143,7 @@ pcie@141c0000 { nvidia,aspm-cmrt-us =3D <60>; nvidia,aspm-pwr-on-t-us =3D <20>; nvidia,aspm-l0s-entrance-latency-us =3D <3>; + aspm-l1-entry-delay-ns =3D <8000>; =20 bus-range =3D <0x0 0xff>; =20 @@ -5177,6 +5190,7 @@ pcie-ep@141c0000 { nvidia,aspm-cmrt-us =3D <60>; nvidia,aspm-pwr-on-t-us =3D <20>; nvidia,aspm-l0s-entrance-latency-us =3D <3>; + aspm-l1-entry-delay-ns =3D <16000>; =20 interconnects =3D <&mc TEGRA234_MEMORY_CLIENT_PCIE6AR &emc>, <&mc TEGRA234_MEMORY_CLIENT_PCIE6AW &emc>; @@ -5225,6 +5239,7 @@ pcie@141e0000 { nvidia,aspm-cmrt-us =3D <60>; nvidia,aspm-pwr-on-t-us =3D <20>; nvidia,aspm-l0s-entrance-latency-us =3D <3>; + aspm-l1-entry-delay-ns =3D <8000>; =20 bus-range =3D <0x0 0xff>; =20 @@ -5271,6 +5286,7 @@ pcie-ep@141e0000 { nvidia,aspm-cmrt-us =3D <60>; nvidia,aspm-pwr-on-t-us =3D <20>; nvidia,aspm-l0s-entrance-latency-us =3D <3>; + aspm-l1-entry-delay-ns =3D <16000>; =20 interconnects =3D <&mc TEGRA234_MEMORY_CLIENT_PCIE7AR &emc>, <&mc TEGRA234_MEMORY_CLIENT_PCIE7AW &emc>; --=20 2.34.1