* [PATCH] arm64: dts: rockchip: remove 408MHz operating point from px30
@ 2019-11-16 9:52 Heiko Stuebner
2019-11-18 0:58 ` Heiko Stuebner
0 siblings, 1 reply; 2+ messages in thread
From: Heiko Stuebner @ 2019-11-16 9:52 UTC (permalink / raw)
To: linux-rockchip
Cc: linux-kernel, linux-arm-kernel, christoph.muellner, kever.yang,
cl, heiko, Heiko Stuebner
From: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
It looks like the px30 is running unstable at this 408MHz operating point.
This shows in stalled threads and other big numbers of kernel exception.
At 600MHz and above it instead works stable and as expected. As the 408MHz
point doesn't even decrease the voltage compared to 600MHz, just drop this
408MHz operating point for now.
Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
---
arch/arm64/boot/dts/rockchip/px30.dtsi | 7 +------
1 file changed, 1 insertion(+), 6 deletions(-)
diff --git a/arch/arm64/boot/dts/rockchip/px30.dtsi b/arch/arm64/boot/dts/rockchip/px30.dtsi
index c68d6fede53d..ff53cc56f80f 100644
--- a/arch/arm64/boot/dts/rockchip/px30.dtsi
+++ b/arch/arm64/boot/dts/rockchip/px30.dtsi
@@ -114,16 +114,11 @@
compatible = "operating-points-v2";
opp-shared;
- opp-408000000 {
- opp-hz = /bits/ 64 <408000000>;
- opp-microvolt = <950000 950000 1350000>;
- clock-latency-ns = <40000>;
- opp-suspend;
- };
opp-600000000 {
opp-hz = /bits/ 64 <600000000>;
opp-microvolt = <950000 950000 1350000>;
clock-latency-ns = <40000>;
+ opp-suspend;
};
opp-816000000 {
opp-hz = /bits/ 64 <816000000>;
--
2.24.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] arm64: dts: rockchip: remove 408MHz operating point from px30
2019-11-16 9:52 [PATCH] arm64: dts: rockchip: remove 408MHz operating point from px30 Heiko Stuebner
@ 2019-11-18 0:58 ` Heiko Stuebner
0 siblings, 0 replies; 2+ messages in thread
From: Heiko Stuebner @ 2019-11-18 0:58 UTC (permalink / raw)
To: linux-rockchip
Cc: linux-kernel, linux-arm-kernel, christoph.muellner, kever.yang, cl
Am Samstag, 16. November 2019, 10:52:20 CET schrieb Heiko Stuebner:
> From: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
>
> It looks like the px30 is running unstable at this 408MHz operating point.
> This shows in stalled threads and other big numbers of kernel exception.
>
> At 600MHz and above it instead works stable and as expected. As the 408MHz
> point doesn't even decrease the voltage compared to 600MHz, just drop this
> 408MHz operating point for now.
>
> Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
applied
^ permalink raw reply [flat|nested] 2+ messages in thread
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