Add EMC OPP tables and interconnect paths that will be used for
dynamic memory bandwidth scaling based on memory utilization statistics.
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
---
.../dts/nvidia/tegra114-peripherals-opp.dtsi | 151 ++++++++++++++++++
arch/arm/boot/dts/nvidia/tegra114.dtsi | 9 ++
2 files changed, 160 insertions(+)
create mode 100644 arch/arm/boot/dts/nvidia/tegra114-peripherals-opp.dtsi
diff --git a/arch/arm/boot/dts/nvidia/tegra114-peripherals-opp.dtsi b/arch/arm/boot/dts/nvidia/tegra114-peripherals-opp.dtsi
new file mode 100644
index 000000000000..1a0e68f22039
--- /dev/null
+++ b/arch/arm/boot/dts/nvidia/tegra114-peripherals-opp.dtsi
@@ -0,0 +1,151 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/ {
+ emc_icc_dvfs_opp_table: opp-table-emc {
+ compatible = "operating-points-v2";
+
+ opp-12750000-900 {
+ opp-microvolt = <900000 900000 1390000>;
+ opp-hz = /bits/ 64 <12750000>;
+ opp-supported-hw = <0x000F>;
+ };
+
+ opp-20400000-900 {
+ opp-microvolt = <900000 900000 1390000>;
+ opp-hz = /bits/ 64 <20400000>;
+ opp-supported-hw = <0x000F>;
+ };
+
+ opp-40800000-900 {
+ opp-microvolt = <900000 900000 1390000>;
+ opp-hz = /bits/ 64 <40800000>;
+ opp-supported-hw = <0x000F>;
+ };
+
+ opp-68000000-900 {
+ opp-microvolt = <900000 900000 1390000>;
+ opp-hz = /bits/ 64 <68000000>;
+ opp-supported-hw = <0x000F>;
+ };
+
+ opp-102000000-900 {
+ opp-microvolt = <900000 900000 1390000>;
+ opp-hz = /bits/ 64 <102000000>;
+ opp-supported-hw = <0x000F>;
+ };
+
+ opp-204000000-900 {
+ opp-microvolt = <900000 900000 1390000>;
+ opp-hz = /bits/ 64 <204000000>;
+ opp-supported-hw = <0x000F>;
+ opp-suspend;
+ };
+
+ opp-312000000-1000 {
+ opp-microvolt = <1000000 1000000 1390000>;
+ opp-hz = /bits/ 64 <312000000>;
+ opp-supported-hw = <0x000F>;
+ };
+
+ opp-408000000-1000 {
+ opp-microvolt = <1000000 1000000 1390000>;
+ opp-hz = /bits/ 64 <408000000>;
+ opp-supported-hw = <0x000F>;
+ };
+
+ opp-528000000-1050 {
+ opp-microvolt = <1050000 1050000 1390000>;
+ opp-hz = /bits/ 64 <528000000>;
+ opp-supported-hw = <0x000E>;
+ };
+
+ opp-528000000-1100 {
+ opp-microvolt = <1100000 1100000 1390000>;
+ opp-hz = /bits/ 64 <528000000>;
+ opp-supported-hw = <0x0001>;
+ };
+
+ opp-624000000-1100 {
+ opp-microvolt = <1100000 1100000 1390000>;
+ opp-hz = /bits/ 64 <624000000>;
+ opp-supported-hw = <0x000F>;
+ };
+
+ opp-792000000-1100 {
+ opp-microvolt = <1100000 1100000 1390000>;
+ opp-hz = /bits/ 64 <792000000>;
+ opp-supported-hw = <0x000F>;
+ };
+ };
+
+ emc_bw_dfs_opp_table: opp-table-actmon {
+ compatible = "operating-points-v2";
+
+ opp-12750000 {
+ opp-hz = /bits/ 64 <12750000>;
+ opp-supported-hw = <0x000F>;
+ opp-peak-kBps = <204000>;
+ };
+
+ opp-20400000 {
+ opp-hz = /bits/ 64 <20400000>;
+ opp-supported-hw = <0x000F>;
+ opp-peak-kBps = <326400>;
+ };
+
+ opp-40800000 {
+ opp-hz = /bits/ 64 <40800000>;
+ opp-supported-hw = <0x000F>;
+ opp-peak-kBps = <652800>;
+ };
+
+ opp-68000000 {
+ opp-hz = /bits/ 64 <68000000>;
+ opp-supported-hw = <0x000F>;
+ opp-peak-kBps = <1088000>;
+ };
+
+ opp-102000000 {
+ opp-hz = /bits/ 64 <102000000>;
+ opp-supported-hw = <0x000F>;
+ opp-peak-kBps = <1632000>;
+ };
+
+ opp-204000000 {
+ opp-hz = /bits/ 64 <204000000>;
+ opp-supported-hw = <0x000F>;
+ opp-peak-kBps = <3264000>;
+ opp-suspend;
+ };
+
+ opp-312000000 {
+ opp-hz = /bits/ 64 <312000000>;
+ opp-supported-hw = <0x000F>;
+ opp-peak-kBps = <4992000>;
+ };
+
+ opp-408000000 {
+ opp-hz = /bits/ 64 <408000000>;
+ opp-supported-hw = <0x000F>;
+ opp-peak-kBps = <6528000>;
+ };
+
+ opp-528000000 {
+ opp-hz = /bits/ 64 <528000000>;
+ opp-supported-hw = <0x000F>;
+ opp-peak-kBps = <8448000>;
+ };
+
+ opp-624000000 {
+ opp-hz = /bits/ 64 <624000000>;
+ opp-supported-hw = <0x000F>;
+ opp-peak-kBps = <9984000>;
+ };
+
+ opp-792000000 {
+ opp-hz = /bits/ 64 <792000000>;
+ opp-supported-hw = <0x000F>;
+ opp-peak-kBps = <12672000>;
+ };
+ };
+};
diff --git a/arch/arm/boot/dts/nvidia/tegra114.dtsi b/arch/arm/boot/dts/nvidia/tegra114.dtsi
index a920ad041c14..6221423b81d1 100644
--- a/arch/arm/boot/dts/nvidia/tegra114.dtsi
+++ b/arch/arm/boot/dts/nvidia/tegra114.dtsi
@@ -8,6 +8,8 @@
#include <dt-bindings/soc/tegra-pmc.h>
#include <dt-bindings/thermal/tegra114-soctherm.h>
+#include "tegra114-peripherals-opp.dtsi"
+
/ {
compatible = "nvidia,tegra114";
interrupt-parent = <&lic>;
@@ -323,6 +325,9 @@ actmon: actmon@6000c800 {
clock-names = "actmon", "emc";
resets = <&tegra_car TEGRA114_CLK_ACTMON>;
reset-names = "actmon";
+ operating-points-v2 = <&emc_bw_dfs_opp_table>;
+ interconnects = <&mc TEGRA114_MC_MPCORER &emc>;
+ interconnect-names = "cpu-read";
#cooling-cells = <2>;
};
@@ -655,6 +660,7 @@ mc: memory-controller@70019000 {
#reset-cells = <1>;
#iommu-cells = <1>;
+ #interconnect-cells = <1>;
};
emc: external-memory-controller@7001b000 {
@@ -665,6 +671,9 @@ emc: external-memory-controller@7001b000 {
clock-names = "emc";
nvidia,memory-controller = <&mc>;
+ operating-points-v2 = <&emc_icc_dvfs_opp_table>;
+
+ #interconnect-cells = <0>;
};
hda@70030000 {
--
2.51.0On Tuesday, November 25, 2025 9:05 PM Svyatoslav Ryhel wrote:
> Add EMC OPP tables and interconnect paths that will be used for
> dynamic memory bandwidth scaling based on memory utilization statistics.
>
> Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
> ---
> .../dts/nvidia/tegra114-peripherals-opp.dtsi | 151 ++++++++++++++++++
> arch/arm/boot/dts/nvidia/tegra114.dtsi | 9 ++
> 2 files changed, 160 insertions(+)
> create mode 100644 arch/arm/boot/dts/nvidia/tegra114-peripherals-opp.dtsi
>
> diff --git a/arch/arm/boot/dts/nvidia/tegra114-peripherals-opp.dtsi b/arch/arm/boot/dts/nvidia/tegra114-peripherals-opp.dtsi
> new file mode 100644
> index 000000000000..1a0e68f22039
> --- /dev/null
> +++ b/arch/arm/boot/dts/nvidia/tegra114-peripherals-opp.dtsi
> @@ -0,0 +1,151 @@
> +// SPDX-License-Identifier: GPL-2.0
> +
> +/ {
> + emc_icc_dvfs_opp_table: opp-table-emc {
> + compatible = "operating-points-v2";
> +
> + opp-12750000-900 {
> + opp-microvolt = <900000 900000 1390000>;
> + opp-hz = /bits/ 64 <12750000>;
> + opp-supported-hw = <0x000F>;
> + };
What's the source of the opp data?
Cheers,
Mikko
> +
> + opp-20400000-900 {
> + opp-microvolt = <900000 900000 1390000>;
> + opp-hz = /bits/ 64 <20400000>;
> + opp-supported-hw = <0x000F>;
> + };
> +
> + opp-40800000-900 {
> + opp-microvolt = <900000 900000 1390000>;
> + opp-hz = /bits/ 64 <40800000>;
> + opp-supported-hw = <0x000F>;
> + };
> +
> + opp-68000000-900 {
> + opp-microvolt = <900000 900000 1390000>;
> + opp-hz = /bits/ 64 <68000000>;
> + opp-supported-hw = <0x000F>;
> + };
> +
> + opp-102000000-900 {
> + opp-microvolt = <900000 900000 1390000>;
> + opp-hz = /bits/ 64 <102000000>;
> + opp-supported-hw = <0x000F>;
> + };
> +
> + opp-204000000-900 {
> + opp-microvolt = <900000 900000 1390000>;
> + opp-hz = /bits/ 64 <204000000>;
> + opp-supported-hw = <0x000F>;
> + opp-suspend;
> + };
> +
> + opp-312000000-1000 {
> + opp-microvolt = <1000000 1000000 1390000>;
> + opp-hz = /bits/ 64 <312000000>;
> + opp-supported-hw = <0x000F>;
> + };
> +
> + opp-408000000-1000 {
> + opp-microvolt = <1000000 1000000 1390000>;
> + opp-hz = /bits/ 64 <408000000>;
> + opp-supported-hw = <0x000F>;
> + };
> +
> + opp-528000000-1050 {
> + opp-microvolt = <1050000 1050000 1390000>;
> + opp-hz = /bits/ 64 <528000000>;
> + opp-supported-hw = <0x000E>;
> + };
> +
> + opp-528000000-1100 {
> + opp-microvolt = <1100000 1100000 1390000>;
> + opp-hz = /bits/ 64 <528000000>;
> + opp-supported-hw = <0x0001>;
> + };
> +
> + opp-624000000-1100 {
> + opp-microvolt = <1100000 1100000 1390000>;
> + opp-hz = /bits/ 64 <624000000>;
> + opp-supported-hw = <0x000F>;
> + };
> +
> + opp-792000000-1100 {
> + opp-microvolt = <1100000 1100000 1390000>;
> + opp-hz = /bits/ 64 <792000000>;
> + opp-supported-hw = <0x000F>;
> + };
> + };
> +
> + emc_bw_dfs_opp_table: opp-table-actmon {
> + compatible = "operating-points-v2";
> +
> + opp-12750000 {
> + opp-hz = /bits/ 64 <12750000>;
> + opp-supported-hw = <0x000F>;
> + opp-peak-kBps = <204000>;
> + };
> +
> + opp-20400000 {
> + opp-hz = /bits/ 64 <20400000>;
> + opp-supported-hw = <0x000F>;
> + opp-peak-kBps = <326400>;
> + };
> +
> + opp-40800000 {
> + opp-hz = /bits/ 64 <40800000>;
> + opp-supported-hw = <0x000F>;
> + opp-peak-kBps = <652800>;
> + };
> +
> + opp-68000000 {
> + opp-hz = /bits/ 64 <68000000>;
> + opp-supported-hw = <0x000F>;
> + opp-peak-kBps = <1088000>;
> + };
> +
> + opp-102000000 {
> + opp-hz = /bits/ 64 <102000000>;
> + opp-supported-hw = <0x000F>;
> + opp-peak-kBps = <1632000>;
> + };
> +
> + opp-204000000 {
> + opp-hz = /bits/ 64 <204000000>;
> + opp-supported-hw = <0x000F>;
> + opp-peak-kBps = <3264000>;
> + opp-suspend;
> + };
> +
> + opp-312000000 {
> + opp-hz = /bits/ 64 <312000000>;
> + opp-supported-hw = <0x000F>;
> + opp-peak-kBps = <4992000>;
> + };
> +
> + opp-408000000 {
> + opp-hz = /bits/ 64 <408000000>;
> + opp-supported-hw = <0x000F>;
> + opp-peak-kBps = <6528000>;
> + };
> +
> + opp-528000000 {
> + opp-hz = /bits/ 64 <528000000>;
> + opp-supported-hw = <0x000F>;
> + opp-peak-kBps = <8448000>;
> + };
> +
> + opp-624000000 {
> + opp-hz = /bits/ 64 <624000000>;
> + opp-supported-hw = <0x000F>;
> + opp-peak-kBps = <9984000>;
> + };
> +
> + opp-792000000 {
> + opp-hz = /bits/ 64 <792000000>;
> + opp-supported-hw = <0x000F>;
> + opp-peak-kBps = <12672000>;
> + };
> + };
> +};
> diff --git a/arch/arm/boot/dts/nvidia/tegra114.dtsi b/arch/arm/boot/dts/nvidia/tegra114.dtsi
> index a920ad041c14..6221423b81d1 100644
> --- a/arch/arm/boot/dts/nvidia/tegra114.dtsi
> +++ b/arch/arm/boot/dts/nvidia/tegra114.dtsi
> @@ -8,6 +8,8 @@
> #include <dt-bindings/soc/tegra-pmc.h>
> #include <dt-bindings/thermal/tegra114-soctherm.h>
>
> +#include "tegra114-peripherals-opp.dtsi"
> +
> / {
> compatible = "nvidia,tegra114";
> interrupt-parent = <&lic>;
> @@ -323,6 +325,9 @@ actmon: actmon@6000c800 {
> clock-names = "actmon", "emc";
> resets = <&tegra_car TEGRA114_CLK_ACTMON>;
> reset-names = "actmon";
> + operating-points-v2 = <&emc_bw_dfs_opp_table>;
> + interconnects = <&mc TEGRA114_MC_MPCORER &emc>;
> + interconnect-names = "cpu-read";
> #cooling-cells = <2>;
> };
>
> @@ -655,6 +660,7 @@ mc: memory-controller@70019000 {
>
> #reset-cells = <1>;
> #iommu-cells = <1>;
> + #interconnect-cells = <1>;
> };
>
> emc: external-memory-controller@7001b000 {
> @@ -665,6 +671,9 @@ emc: external-memory-controller@7001b000 {
> clock-names = "emc";
>
> nvidia,memory-controller = <&mc>;
> + operating-points-v2 = <&emc_icc_dvfs_opp_table>;
> +
> + #interconnect-cells = <0>;
> };
>
> hda@70030000 {
>
ср, 21 січ. 2026 р. о 09:56 Mikko Perttunen <mperttunen@nvidia.com> пише:
>
> On Tuesday, November 25, 2025 9:05 PM Svyatoslav Ryhel wrote:
> > Add EMC OPP tables and interconnect paths that will be used for
> > dynamic memory bandwidth scaling based on memory utilization statistics.
> >
> > Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
> > ---
> > .../dts/nvidia/tegra114-peripherals-opp.dtsi | 151 ++++++++++++++++++
> > arch/arm/boot/dts/nvidia/tegra114.dtsi | 9 ++
> > 2 files changed, 160 insertions(+)
> > create mode 100644 arch/arm/boot/dts/nvidia/tegra114-peripherals-opp.dtsi
> >
> > diff --git a/arch/arm/boot/dts/nvidia/tegra114-peripherals-opp.dtsi b/arch/arm/boot/dts/nvidia/tegra114-peripherals-opp.dtsi
> > new file mode 100644
> > index 000000000000..1a0e68f22039
> > --- /dev/null
> > +++ b/arch/arm/boot/dts/nvidia/tegra114-peripherals-opp.dtsi
> > @@ -0,0 +1,151 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +
> > +/ {
> > + emc_icc_dvfs_opp_table: opp-table-emc {
> > + compatible = "operating-points-v2";
> > +
> > + opp-12750000-900 {
> > + opp-microvolt = <900000 900000 1390000>;
> > + opp-hz = /bits/ 64 <12750000>;
> > + opp-supported-hw = <0x000F>;
> > + };
>
> What's the source of the opp data?
>
I have used tf701t (T40X) and tegratab (T40S) kernel sources, to be
more specific board-*-memory.c files. Timing struct for each clock
contains min voltage field which was used to compose these opps.
1390000 is the max core regulator voltage, taken from tegra11_dvfs.c
I have converted an entire core_dvfs_table table from tegra11_dvfs.c
and I am planning to submit those later on too along with
powergates/domains configuration for tegra114, but that is for another
time :)
> Cheers,
> Mikko
>
> > +
> > + opp-20400000-900 {
> > + opp-microvolt = <900000 900000 1390000>;
> > + opp-hz = /bits/ 64 <20400000>;
> > + opp-supported-hw = <0x000F>;
> > + };
> > +
> > + opp-40800000-900 {
> > + opp-microvolt = <900000 900000 1390000>;
> > + opp-hz = /bits/ 64 <40800000>;
> > + opp-supported-hw = <0x000F>;
> > + };
> > +
> > + opp-68000000-900 {
> > + opp-microvolt = <900000 900000 1390000>;
> > + opp-hz = /bits/ 64 <68000000>;
> > + opp-supported-hw = <0x000F>;
> > + };
> > +
> > + opp-102000000-900 {
> > + opp-microvolt = <900000 900000 1390000>;
> > + opp-hz = /bits/ 64 <102000000>;
> > + opp-supported-hw = <0x000F>;
> > + };
> > +
> > + opp-204000000-900 {
> > + opp-microvolt = <900000 900000 1390000>;
> > + opp-hz = /bits/ 64 <204000000>;
> > + opp-supported-hw = <0x000F>;
> > + opp-suspend;
> > + };
> > +
> > + opp-312000000-1000 {
> > + opp-microvolt = <1000000 1000000 1390000>;
> > + opp-hz = /bits/ 64 <312000000>;
> > + opp-supported-hw = <0x000F>;
> > + };
> > +
> > + opp-408000000-1000 {
> > + opp-microvolt = <1000000 1000000 1390000>;
> > + opp-hz = /bits/ 64 <408000000>;
> > + opp-supported-hw = <0x000F>;
> > + };
> > +
> > + opp-528000000-1050 {
> > + opp-microvolt = <1050000 1050000 1390000>;
> > + opp-hz = /bits/ 64 <528000000>;
> > + opp-supported-hw = <0x000E>;
> > + };
> > +
> > + opp-528000000-1100 {
> > + opp-microvolt = <1100000 1100000 1390000>;
> > + opp-hz = /bits/ 64 <528000000>;
> > + opp-supported-hw = <0x0001>;
> > + };
> > +
> > + opp-624000000-1100 {
> > + opp-microvolt = <1100000 1100000 1390000>;
> > + opp-hz = /bits/ 64 <624000000>;
> > + opp-supported-hw = <0x000F>;
> > + };
> > +
> > + opp-792000000-1100 {
> > + opp-microvolt = <1100000 1100000 1390000>;
> > + opp-hz = /bits/ 64 <792000000>;
> > + opp-supported-hw = <0x000F>;
> > + };
> > + };
> > +
> > + emc_bw_dfs_opp_table: opp-table-actmon {
> > + compatible = "operating-points-v2";
> > +
> > + opp-12750000 {
> > + opp-hz = /bits/ 64 <12750000>;
> > + opp-supported-hw = <0x000F>;
> > + opp-peak-kBps = <204000>;
> > + };
> > +
> > + opp-20400000 {
> > + opp-hz = /bits/ 64 <20400000>;
> > + opp-supported-hw = <0x000F>;
> > + opp-peak-kBps = <326400>;
> > + };
> > +
> > + opp-40800000 {
> > + opp-hz = /bits/ 64 <40800000>;
> > + opp-supported-hw = <0x000F>;
> > + opp-peak-kBps = <652800>;
> > + };
> > +
> > + opp-68000000 {
> > + opp-hz = /bits/ 64 <68000000>;
> > + opp-supported-hw = <0x000F>;
> > + opp-peak-kBps = <1088000>;
> > + };
> > +
> > + opp-102000000 {
> > + opp-hz = /bits/ 64 <102000000>;
> > + opp-supported-hw = <0x000F>;
> > + opp-peak-kBps = <1632000>;
> > + };
> > +
> > + opp-204000000 {
> > + opp-hz = /bits/ 64 <204000000>;
> > + opp-supported-hw = <0x000F>;
> > + opp-peak-kBps = <3264000>;
> > + opp-suspend;
> > + };
> > +
> > + opp-312000000 {
> > + opp-hz = /bits/ 64 <312000000>;
> > + opp-supported-hw = <0x000F>;
> > + opp-peak-kBps = <4992000>;
> > + };
> > +
> > + opp-408000000 {
> > + opp-hz = /bits/ 64 <408000000>;
> > + opp-supported-hw = <0x000F>;
> > + opp-peak-kBps = <6528000>;
> > + };
> > +
> > + opp-528000000 {
> > + opp-hz = /bits/ 64 <528000000>;
> > + opp-supported-hw = <0x000F>;
> > + opp-peak-kBps = <8448000>;
> > + };
> > +
> > + opp-624000000 {
> > + opp-hz = /bits/ 64 <624000000>;
> > + opp-supported-hw = <0x000F>;
> > + opp-peak-kBps = <9984000>;
> > + };
> > +
> > + opp-792000000 {
> > + opp-hz = /bits/ 64 <792000000>;
> > + opp-supported-hw = <0x000F>;
> > + opp-peak-kBps = <12672000>;
> > + };
> > + };
> > +};
> > diff --git a/arch/arm/boot/dts/nvidia/tegra114.dtsi b/arch/arm/boot/dts/nvidia/tegra114.dtsi
> > index a920ad041c14..6221423b81d1 100644
> > --- a/arch/arm/boot/dts/nvidia/tegra114.dtsi
> > +++ b/arch/arm/boot/dts/nvidia/tegra114.dtsi
> > @@ -8,6 +8,8 @@
> > #include <dt-bindings/soc/tegra-pmc.h>
> > #include <dt-bindings/thermal/tegra114-soctherm.h>
> >
> > +#include "tegra114-peripherals-opp.dtsi"
> > +
> > / {
> > compatible = "nvidia,tegra114";
> > interrupt-parent = <&lic>;
> > @@ -323,6 +325,9 @@ actmon: actmon@6000c800 {
> > clock-names = "actmon", "emc";
> > resets = <&tegra_car TEGRA114_CLK_ACTMON>;
> > reset-names = "actmon";
> > + operating-points-v2 = <&emc_bw_dfs_opp_table>;
> > + interconnects = <&mc TEGRA114_MC_MPCORER &emc>;
> > + interconnect-names = "cpu-read";
> > #cooling-cells = <2>;
> > };
> >
> > @@ -655,6 +660,7 @@ mc: memory-controller@70019000 {
> >
> > #reset-cells = <1>;
> > #iommu-cells = <1>;
> > + #interconnect-cells = <1>;
> > };
> >
> > emc: external-memory-controller@7001b000 {
> > @@ -665,6 +671,9 @@ emc: external-memory-controller@7001b000 {
> > clock-names = "emc";
> >
> > nvidia,memory-controller = <&mc>;
> > + operating-points-v2 = <&emc_icc_dvfs_opp_table>;
> > +
> > + #interconnect-cells = <0>;
> > };
> >
> > hda@70030000 {
> >
>
>
>
>
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