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arm64: dts: rockchip: add GPU powerdomain, opps, and cooling to rk3328

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Add GPU powerdomain, opp-table, and cooling map nodes for the Mali
GPU on the RK3328 SoC. Opp-table frequencies are sourced from the
Rockchip Linux v4.4 vendor kernel while voltages have been derived
from practical use and support work: keeping voltage above 1075mV
and disabling the 500MHz opp-point avoids instability and crashes.

Signed-off-by: Alex Bee <knaerzche@gmail.com>
Signed-off-by: Christian Hewitt <christianshewitt@gmail.com>
Tested-by: Diederik de Haas <didi.debian@cknow.org>  # Rock64
Link: https://lore.kernel.org/r/20250906120810.1833016-1-christianshewitt@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
This commit is contained in:
Alex Bee
2025-09-06 12:08:09 +00:00
committed by Heiko Stuebner
parent 843367c7ed
commit 718efbc6a7
1 changed files with 39 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

40
arch/arm64/boot/dts/rockchip/rk3328.dtsi
View File

@@ -331,6 +331,11 @@
#address-cells = <1>;
#size-cells = <0>;
power-domain@RK3328_PD_GPU {
reg = <RK3328_PD_GPU>;
clocks = <&cru ACLK_GPU>;
#power-domain-cells = <0>;
};
power-domain@RK3328_PD_HEVC {
reg = <RK3328_PD_HEVC>;
clocks = <&cru SCLK_VENC_CORE>;
@@ -570,9 +575,13 @@
<&cpu3 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
contribution = <4096>;
};
map1 {
trip = <&target>;
cooling-device = <&gpu THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
contribution = <4096>;
};
};
};
};
tsadc: tsadc@ff250000 {
@@ -651,7 +660,36 @@
"ppmmu1";
clocks = <&cru ACLK_GPU>, <&cru ACLK_GPU>;
clock-names = "bus", "core";
operating-points-v2 = <&gpu_opp_table>;
power-domains = <&power RK3328_PD_GPU>;
resets = <&cru SRST_GPU_A>;
#cooling-cells = <2>;
};
gpu_opp_table: opp-table-gpu {
compatible = "operating-points-v2";
opp-200000000 {
opp-hz = /bits/ 64 <200000000>;
opp-microvolt = <1075000>;
};
opp-300000000 {
opp-hz = /bits/ 64 <300000000>;
opp-microvolt = <1075000>;
};
opp-400000000 {
opp-hz = /bits/ 64 <400000000>;
opp-microvolt = <1075000>;
};
opp-500000000 {
/* causes stability issues */
opp-hz = /bits/ 64 <500000000>;
opp-microvolt = <1150000>;
status = "disabled";
};
};
h265e_mmu: iommu@ff330200 {