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

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Message-ID: <3cba9996-228e-4086-99ba-4a2a00de57ab@gmail.com>
Date: Sat, 1 Nov 2025 20:14:31 +0800
From: Tianling Shen <cnsztl@...il.com>
To: Heiko Stuebner <heiko@...ech.de>
Cc: devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
 Shawn Lin <shawn.lin@...k-chips.com>, 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>, Jonas Karlman <jonas@...boo.se>,
 Jianfeng Liu <liujianfeng1994@...il.com>
Subject: Re: [PATCH] arm64: dts: rockchip: fix eMMC corruption on NanoPC-T6
 with A3A444 chips

Hi Heiko,

On 2025/11/1 19:54, Heiko Stuebner wrote:
> Am Montag, 27. Oktober 2025, 18:34:25 Mitteleuropäische Normalzeit schrieb Tianling Shen:
>> + Jianfeng
>>
>> On 2025/10/20 12:44, Tianling Shen wrote:
>>> 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.
>>
>> Hi all, sorry for the late. My friend has tested this patch and it works
>> fine after 50 times dd operation. A big thanks to Shawn!
> 
> So I guess, we don't need the patch reducing the speed anymore, right?

Yes! ;)

Thanks,
Tianling.

> 
> 
> Thanks
> Heiko
> 
> 
>> And hi Jianfeng, I found you made a similiar patch[1] for the ROCK 5 ITX
>> board to lower down the mmc speed, could you please check if this patch
>> also fixes your issue?
>>
>> Thanks,
>> Tianling.
>>
>> 1.
>> https://lore.kernel.org/linux-rockchip/20250228143341.70244-1-liujianfeng1994@gmail.com/
>>
>>>
>>> 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";
>>>>>    };
>>>>
>>>
>>
>>
> 
> 
> 
>