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

[Heiko Stuebner]

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 at sternicz.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 at rock-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?


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 at sternicz.uk>
> >>> Signed-off-by: Tianling Shen <cnsztl at gmail.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";
> >>>   };
> >>
> > 
> 
>