Enable rknn_core_0 and its IOMMU on the Radxa ROCK 4D, and hand vdd_npu_s0 to the NPU power domain as its domain-supply, so the rail is switched by the domain that gates the block.
Measured on a ROCK 4D with this in place. The rail's regulator debugfs reports open_count 1, so the domain is the consumer that took it. A sampler running beside an inference caught use_count at 1, and three reads at rest report use_count 0 with the rail disabled, so it follows the domain rather than staying on. Over the same run the genpd active_time of all four NPU domains rises by roughly 60ms per inference, and the inferences either side of that are 128 of 128 channels against the CPU reference. rknn_core_0 keeps npu-supply on the same rail, which the binding requires. Only rknn_core_0 is enabled: the driver binds one core per node and the second core is left to whoever can test it. Signed-off-by: Jiaxing Hu <[email protected]> --- arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts b/arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts index 272af1012..79e039bee 100644 --- a/arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts +++ b/arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts @@ -722,6 +722,10 @@ &pcie0 { status = "okay"; }; +&pd_npu { + domain-supply = <&vdd_npu_s0>; +}; + &pinctrl { hdmi { hdmi_tx_on_h: hdmi-tx-on-h { @@ -779,6 +783,15 @@ wifi_en_h: wifi-en-h { }; }; +&rknn_core_0 { + npu-supply = <&vdd_npu_s0>; + status = "okay"; +}; + +&rknn_mmu_0 { + status = "okay"; +}; + &sai6 { status = "okay"; }; -- 2.43.0
