From: Manikanta Maddireddy Date: Fri, 15 May 2026 07:07:53 +0000 (+0530) Subject: arm64: tegra: Fix aspm-l1-entry-delay-ns L1 latency cells X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bba8eefb56480c7b06a25e99632b1b6510a25473;p=thirdparty%2Flinux.git arm64: tegra: Fix aspm-l1-entry-delay-ns L1 latency cells The Tegra194 PCIe driver converts aspm-l1-entry-delay-ns to whole ms with ceiling division, then derives the Synopsys DesignWare PORT_AFR L1 entrance latency encoding as min(order_base_2(us), 7). The nanosecond values from the Fixes tag below round up to 4, 8, and 16 us, selecting PORT_AFR L1 entrance latency codes 2, 3, and 4 respectively. Raise the programmed latency so the PORT_AFR codes are 3 / 4 / 5 (8 / 16 / 32 us buckets) instead of 2 / 3 / 4 (4 / 8 / 16 us). - tegra194.dtsi: 4000 -> 8000 ns (all listed controllers) - tegra234.dtsi: 8000 -> 16000 ns (Root Port), 16000 -> 32000 ns (Endpoint) Fixes: d60ed99f1c9e ("arm64: tegra: Add aspm-l1-entry-delay-ns to PCIe nodes") Signed-off-by: Manikanta Maddireddy Signed-off-by: Thierry Reding --- diff --git a/arch/arm64/boot/dts/nvidia/tegra194.dtsi b/arch/arm64/boot/dts/nvidia/tegra194.dtsi index 1d659454a6f9..7bbf0e892724 100644 --- a/arch/arm64/boot/dts/nvidia/tegra194.dtsi +++ b/arch/arm64/boot/dts/nvidia/tegra194.dtsi @@ -2382,7 +2382,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <4000>; + aspm-l1-entry-delay-ns = <8000>; bus-range = <0x0 0xff>; @@ -2435,7 +2435,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <4000>; + aspm-l1-entry-delay-ns = <8000>; bus-range = <0x0 0xff>; @@ -2488,7 +2488,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <4000>; + aspm-l1-entry-delay-ns = <8000>; bus-range = <0x0 0xff>; @@ -2541,7 +2541,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <4000>; + aspm-l1-entry-delay-ns = <8000>; bus-range = <0x0 0xff>; @@ -2587,7 +2587,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <4000>; + aspm-l1-entry-delay-ns = <8000>; interconnects = <&mc TEGRA194_MEMORY_CLIENT_PCIE4R &emc>, <&mc TEGRA194_MEMORY_CLIENT_PCIE4W &emc>; @@ -2634,7 +2634,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <4000>; + aspm-l1-entry-delay-ns = <8000>; bus-range = <0x0 0xff>; @@ -2680,7 +2680,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <4000>; + aspm-l1-entry-delay-ns = <8000>; interconnects = <&mc TEGRA194_MEMORY_CLIENT_PCIE0R &emc>, <&mc TEGRA194_MEMORY_CLIENT_PCIE0W &emc>; @@ -2730,7 +2730,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <4000>; + aspm-l1-entry-delay-ns = <8000>; bus-range = <0x0 0xff>; @@ -2779,7 +2779,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <4000>; + aspm-l1-entry-delay-ns = <8000>; interconnects = <&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 75bb9a0ad027..8e0c51e496e2 100644 --- a/arch/arm64/boot/dts/nvidia/tegra234.dtsi +++ b/arch/arm64/boot/dts/nvidia/tegra234.dtsi @@ -4532,7 +4532,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <8000>; + aspm-l1-entry-delay-ns = <16000>; bus-range = <0x0 0xff>; @@ -4587,7 +4587,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <8000>; + aspm-l1-entry-delay-ns = <16000>; bus-range = <0x0 0xff>; @@ -4642,7 +4642,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <8000>; + aspm-l1-entry-delay-ns = <16000>; bus-range = <0x0 0xff>; @@ -4689,7 +4689,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <16000>; + aspm-l1-entry-delay-ns = <32000>; interconnects = <&mc TEGRA234_MEMORY_CLIENT_PCIE10AR &emc>, <&mc TEGRA234_MEMORY_CLIENT_PCIE10AW &emc>; @@ -4738,7 +4738,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <8000>; + aspm-l1-entry-delay-ns = <16000>; bus-range = <0x0 0xff>; @@ -4793,7 +4793,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <8000>; + aspm-l1-entry-delay-ns = <16000>; bus-range = <0x0 0xff>; @@ -4848,7 +4848,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <8000>; + aspm-l1-entry-delay-ns = <16000>; bus-range = <0x0 0xff>; @@ -4903,7 +4903,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <8000>; + aspm-l1-entry-delay-ns = <16000>; bus-range = <0x0 0xff>; @@ -4945,7 +4945,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <16000>; + aspm-l1-entry-delay-ns = <32000>; interconnects = <&mc TEGRA234_MEMORY_CLIENT_PCIE4R &emc>, <&mc TEGRA234_MEMORY_CLIENT_PCIE4W &emc>; @@ -4992,7 +4992,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <8000>; + aspm-l1-entry-delay-ns = <16000>; bus-range = <0x0 0xff>; @@ -5047,7 +5047,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <8000>; + aspm-l1-entry-delay-ns = <16000>; bus-range = <0x0 0xff>; @@ -5094,7 +5094,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <16000>; + aspm-l1-entry-delay-ns = <32000>; interconnects = <&mc TEGRA234_MEMORY_CLIENT_PCIE5R &emc>, <&mc TEGRA234_MEMORY_CLIENT_PCIE5W &emc>; @@ -5143,7 +5143,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <8000>; + aspm-l1-entry-delay-ns = <16000>; bus-range = <0x0 0xff>; @@ -5190,7 +5190,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <16000>; + aspm-l1-entry-delay-ns = <32000>; interconnects = <&mc TEGRA234_MEMORY_CLIENT_PCIE6AR &emc>, <&mc TEGRA234_MEMORY_CLIENT_PCIE6AW &emc>; @@ -5239,7 +5239,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <8000>; + aspm-l1-entry-delay-ns = <16000>; bus-range = <0x0 0xff>; @@ -5286,7 +5286,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <16000>; + aspm-l1-entry-delay-ns = <32000>; interconnects = <&mc TEGRA234_MEMORY_CLIENT_PCIE7AR &emc>, <&mc TEGRA234_MEMORY_CLIENT_PCIE7AW &emc>;