[BUG] Raxda Rock Pi 4A serial console output stops prematurely

[Anand Moon]

Hi FUKAUMI,

On Sat, 29 Nov 2025 at 10:09, FUKAUMI Naoki <naoki at radxa.com> wrote:
>
> Hi Anand,
>
> On 11/28/25 14:50, Anand Moon wrote:
> > Hi Heinrich,
> >
> >>> Thanks. I am having the same issue with my Radxa Rock Pi 4 B Plus.
> >>>
> >>> But I am booting from SPI flash, so I cannot stop this board in the
> >>> U-Boot prompt.
> >>>
> >>> Is there any other way to flash the SPI flash u-boot-rockchip-spi.bin image
> >>> in the user space to spi flash? using dd coammnd
> >>>
> >>>   From the schematics, it has W25Q64FWZPIG
> >>>
> >>> [1] https://dl.radxa.com/rockpi4/docs/hw/rockpi4/rockpi4_v13_sch_20181112.pdf
> >>>
> >>> I have tried to enable SPI flash, but it is not getting detected on
> >>> the board in userspace.
> >>
> >>
> >> https://wiki2.radxa.com/Rockpi4/dev/usb-install
> >> has some guidance how to avoid booting from SPI NOR flash.
> >>
> > Thanks for your tip.
> >
> > I've attempted this method, but it hasn't worked for me.
> > Could you provide the SPI details for this board so I can map it in driver code
> > and from userspace and then attempt to erase or reflash the image?
> >
> > on my board
> > [    1.282609] mmcblk0boot0: mmc0:0001 SLD64G 4.00 MiB
> > [    1.285862] spi-nor spi1.0: unrecognized JEDEC id bytes: ff ff ff ff ff ff
>
> Are you using dts with "audio-supply = <&vcc_3v0>;"? It should fix SPI too.
>
Thanks for your tip.

I have applied the patch from FUKAUMI, and now my console output has
started working

> 1. Make u-boot-rockchip.bin with "audio-supply = <&vcc_3v0>;"
> 2. Write it to microSD card
> 3. Insert it
> 4. Kill SPI flash
> 5. Boot U-Boot from SD card
> 6. Revert 4.
> 7. Try "sf probe" "sf erase"
>
Yes, I have tried these steps (4 Kill SPI flash) ->
I have shortened the SPI1_CLK and GNG in the GPIO header
But this board first boots from SPI flash, I don't know the reason.

I noticed your patch references the W25Q128.
Did you get this device detection in userspace?

This output is from your patch.
=> led blue:status off
=> sf probe
SF: Detected w25q128 with page size 256 Bytes, erase size 4 KiB, total 16 MiB
=> led blue:status on
=> sf probe
jedec_spi_nor flash at 0: unrecognized JEDEC id bytes: ff, ff, ff
Failed to initialize SPI flash at 1:0 (error -2)

Could this explain why I’m unable to detect the device from userspace?

> Best regards,
>
> --
> FUKAUMI Naoki
> Radxa Computer (Shenzhen) Co., Ltd.
>
Thanks
-Anand