Re: [PATCH] arm64: dts: qcom: sm8550: Add missing CPU7 3.36GHz OPP

From: Val Packett

Date: Wed Nov 04 2026 - 18:21:37 EST


On 11/4/26 4:41 PM, Nizat Mikayilli via B4 Relay wrote:
From: Nizat Mikayilli <nacht@xxxxxxxxxx>

The cpufreq LUT on the Samsung Galaxy Tab S9 Wi-Fi has a 3.36GHz boost
entry for CPU7 without a matching OPP, so the frequency is dropped:

cpu cpu7: Voltage update failed freq=3360000
cpu cpu7: failed to update OPP for freq=3360000

Fixes: 3f5dcc05cd33 ("arm64: dts: qcom: sm8550: add cpu OPP table with DDR, LLCC & L3 bandwidths")
Signed-off-by: Nizat Mikayilli <nacht@xxxxxxxxxx>
---
arch/arm64/boot/dts/qcom/sm8550.dtsi | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sm8550.dtsi b/arch/arm64/boot/dts/qcom/sm8550.dtsi
index 03f6d40edea7..ed6e34ac8d56 100644
--- a/arch/arm64/boot/dts/qcom/sm8550.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8550.dtsi
@@ -752,6 +752,11 @@ opp-3187200000 {
opp-hz = /bits/ 64 <3187200000>;
opp-peak-kBps = <(933000 * 16) (3686000 * 4) (1689600 * 32)>;
};
+
+ opp-3360000000 {
+ opp-hz = /bits/ 64 <3360000000>;
+ opp-peak-kBps = <(933000 * 16) (3686000 * 4) (1689600 * 32)>;
+ };
};
pmu-a510 {

This seems variant/speedbin dependent and does not apply to all sm8550.

In fact a quick web search shows that your device has a "Snapdragon 8 Gen 2 for Galaxy" which is a customized chip for Smasnug.

You should just add the OPP in your tablet's .dts I think.


Thanks,
~val