linux-kernel - [PATCH] Update H700 opp values

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Message-ID: <20241128154556.2743839-1-simons.philippe@gmail.com>
Date: Thu, 28 Nov 2024 16:45:56 +0100
From: Philippe Simons <simons.philippe@...il.com>
To: Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Chen-Yu Tsai <wens@...e.org>,
	Jernej Skrabec <jernej.skrabec@...il.com>,
	Samuel Holland <samuel@...lland.org>,
	devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS),
	linux-arm-kernel@...ts.infradead.org (moderated list:ARM/Allwinner sunXi SoC support),
	linux-sunxi@...ts.linux.dev (open list:ARM/Allwinner sunXi SoC support),
	linux-kernel@...r.kernel.org (open list)
Cc: Philippe Simons <simons.philippe@...il.com>
Subject: [PATCH] Update H700 opp values

My H700 (RG35XX-H, RG40XX-V and RG CubeXX) devices are very unstable,
especially with some OPPs.
Crashes were fairly easy to reproduce with any dynamic cpufreq governor
and some load on CPU, usually in matter of minutes.
Crashes manifested randomly as simply hanging or various kernel oops

Manufacturer (Anbernic) is using more conservative mircrovolt values,
so let's use these.
While using performance gov seems stables at 1.5Ghz, it still crashes
using a dynamic gov (even with Andre reparenting patch), so let's drop
it for now, like manufacturer does.

Signed-off-by: Philippe Simons <simons.philippe@...il.com
---
 .../dts/allwinner/sun50i-h616-cpu-opp.dtsi    | 19 +++++++++----------
 1 file changed, 9 insertions(+), 10 deletions(-)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h616-cpu-opp.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-h616-cpu-opp.dtsi
index dd10aaf47..ac13fe169 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-h616-cpu-opp.dtsi
+++ b/arch/arm64/boot/dts/allwinner/sun50i-h616-cpu-opp.dtsi
@@ -50,24 +50,21 @@ opp-1008000000 {
 			opp-microvolt-speed2 = <950000>;
 			opp-microvolt-speed3 = <950000>;
 			opp-microvolt-speed4 = <1020000>;
-			opp-microvolt-speed5 = <900000>;
+			opp-microvolt-speed5 = <950000>;
 			clock-latency-ns = <244144>; /* 8 32k periods */
 			opp-supported-hw = <0x3f>;
 		};
 
 		opp-1032000000 {
 			opp-hz = /bits/ 64 <1032000000>;
-			opp-microvolt = <900000>;
+			opp-microvolt = <950000>;
 			clock-latency-ns = <244144>; /* 8 32k periods */
 			opp-supported-hw = <0x20>;
 		};
 
 		opp-1104000000 {
 			opp-hz = /bits/ 64 <1104000000>;
-			opp-microvolt-speed0 = <1000000>;
-			opp-microvolt-speed2 = <1000000>;
-			opp-microvolt-speed3 = <1000000>;
-			opp-microvolt-speed5 = <950000>;
+			opp-microvolt = <1000000>;			
 			clock-latency-ns = <244144>; /* 8 32k periods */
 			opp-supported-hw = <0x2d>;
 		};
@@ -79,7 +76,7 @@ opp-1200000000 {
 			opp-microvolt-speed2 = <1050000>;
 			opp-microvolt-speed3 = <1050000>;
 			opp-microvolt-speed4 = <1100000>;
-			opp-microvolt-speed5 = <1020000>;
+			opp-microvolt-speed5 = <1050000>;
 			clock-latency-ns = <244144>; /* 8 32k periods */
 			opp-supported-hw = <0x3f>;
 		};
@@ -93,7 +90,10 @@ opp-1320000000 {
 
 		opp-1416000000 {
 			opp-hz = /bits/ 64 <1416000000>;
-			opp-microvolt = <1100000>;
+			opp-microvolt-speed0 = <1100000>;
+			opp-microvolt-speed2 = <1100000>;
+			opp-microvolt-speed3 = <1100000>;
+			opp-microvolt-speed5 = <1160000>;
 			clock-latency-ns = <244144>; /* 8 32k periods */
 			opp-supported-hw = <0x2d>;
 		};
@@ -102,9 +102,8 @@ opp-1512000000 {
 			opp-hz = /bits/ 64 <1512000000>;
 			opp-microvolt-speed1 = <1100000>;
 			opp-microvolt-speed3 = <1100000>;
-			opp-microvolt-speed5 = <1160000>;
 			clock-latency-ns = <244144>; /* 8 32k periods */
-			opp-supported-hw = <0x2a>;
+			opp-supported-hw = <0x0a>;
 		};
 	};
 };
-- 
2.46.1