linux-kernel - Re: [PATCH] arm64: dts: rockchip: fix eMMC corruption on NanoPC-T6 with A3A444 chips

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Message-ID: <08911ae2-fef3-432d-a236-d820c9cb67ac@gmail.com>
Date: Mon, 20 Oct 2025 12:44:01 +0800
From: Tianling Shen <cnsztl@...il.com>
To: Shawn Lin <shawn.lin@...k-chips.com>
Cc: devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>,
 Grzegorz Sterniczuk <grzegorz@...rnicz.uk>, Dragan Simic
 <dsimic@...jaro.org>, Heiko Stuebner <heiko@...ech.de>,
 Jonas Karlman <jonas@...boo.se>
Subject: Re: [PATCH] arm64: dts: rockchip: fix eMMC corruption on NanoPC-T6
 with A3A444 chips

Hi Shawn,

On 2025/10/20 9:53, Shawn Lin wrote:
> Hi Tianling
> 
> On 2025/10/17 Friday 15:39, Tianling Shen wrote:
>> From: Grzegorz Sterniczuk <grzegorz@...rnicz.uk>
>>
>> Some NanoPC-T6 boards with A3A444 eMMC chips experience I/O errors and
>> corruption when using HS400 mode. Downgrade to HS200 mode to ensure
>> stable operation.
> 
> May I ask you to test another patch I just posted to see if it fixes
> your issue?
> 
> https://patchwork.kernel.org/project/linux-mmc/patch/1760924981-52339-1- 
> git-send-email-shawn.lin@...k-chips.com/

Thank you for the patch! I will ask my friend to test it but he uses 
this board as a home router, so it may take a few days or weeks to 
report the result.

Thanks,
Tianling.

> 
> 
>>
>> Signed-off-by: Grzegorz Sterniczuk <grzegorz@...rnicz.uk>
>> Signed-off-by: Tianling Shen <cnsztl@...il.com>
>> ---
>>   arch/arm64/boot/dts/rockchip/rk3588-nanopc-t6.dtsi | 3 +--
>>   1 file changed, 1 insertion(+), 2 deletions(-)
>>
>> diff --git a/arch/arm64/boot/dts/rockchip/rk3588-nanopc-t6.dtsi b/ 
>> arch/arm64/boot/dts/rockchip/rk3588-nanopc-t6.dtsi
>> index fafeabe9adf9..5f63f38f7326 100644
>> --- a/arch/arm64/boot/dts/rockchip/rk3588-nanopc-t6.dtsi
>> +++ b/arch/arm64/boot/dts/rockchip/rk3588-nanopc-t6.dtsi
>> @@ -717,8 +717,7 @@ &sdhci {
>>       no-sd;
>>       non-removable;
>>       max-frequency = <200000000>;
>> -    mmc-hs400-1_8v;
>> -    mmc-hs400-enhanced-strobe;
>> +    mmc-hs200-1_8v;
>>       status = "okay";
>>   };
>