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

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Message-ID: <d70c0eb5-9aa2-47b1-8205-81b724180319@rock-chips.com>
Date: Mon, 20 Oct 2025 09:53:34 +0800
From: Shawn Lin <shawn.lin@...k-chips.com>
To: Tianling Shen <cnsztl@...il.com>
Cc: shawn.lin@...k-chips.com, 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 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@rock-chips.com/


> 
> 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";
>   };
>