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

[Tianling Shen]

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@xxxxxxxxxxx>
> > > > >
> > > > > 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@xxxxxxxxxxxxxx/
> > >
> > > 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@xxxxxxxxx/
> >
> > > Thanks,
> > > Tianling.
> > >
> > > > > Signed-off-by: Grzegorz Sterniczuk <grzegorz@xxxxxxxxxxx>
> > > > > Signed-off-by: Tianling Shen <cnsztl@xxxxxxxxx>
> > > > > ---
> > > > >    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";
> > > > >    };