RV1103B: Attempt to upstream

[Yao Zi]

On Sat, Jan 10, 2026 at 03:20:39AM +0000, Christopher Obbard wrote:
> Hi Fabio,
> 
> On Thu, 2025-12-18 at 23:45 -0300, Fabio Estevam wrote:
> > Hi,
> > 
> > I have a custom board based on the Rockchip evb-rv1103 (RV1103B silicon),
> > booting from SPI-NAND.
> > 
> > I can successfully boot the vendor Rockchip U-Boot v2017.09 on this board,
> > from SPI-NAND
> > 
> > I am currently working on upstreaming U-Boot support for the RV1103B SoC.
> > My first RFC attempt is available here:
> > 
> >   https://github.com/fabioestevam/u-boot/commits/rv1103/
> > 
> > Build steps:
> > 
> >   make evb-rv1103_defconfig
> >   make
> > 
> > However, I am not yet able to boot U-Boot on the board. At the moment,
> > the board does not boot and only prints "RKUART".
> > 
> > My initial plan was to avoid SPL, similar to the evb-rv1108 approach
> > (described in board/rockchip/evb_rv1108/README).
> > 
> > Before going further, I would like to ask:
> > 
> > Is the evb-rv1108 “no SPL” boot flow a valid reference for RV1103B?
> > 
> 
> Great to see the RV1103 being upstreamed!
> 
> 
> I have a Rockchip RV1106 based board, the CoolPi 1B https://www.cool-pi.com/product-category/gateway/cp1b/ which I'd also like to get in upstream linux/u-boot.
> 
> The downstream kernel/devicetree is at https://github.com/coolpi-george/coolpi-kernel/blob/linux-5.10-gen-rkr8/arch/arm/boot/dts/rv1106-cp1b.dts with defconfig
> https://github.com/coolpi-george/coolpi-kernel/blob/linux-5.10-gen-rkr8/arch/arm/configs/rv1106_cp1b_defconfig
> 
> The downstream u-boot is https://github.com/coolpi-george/coolpi-loader/blob/develop/configs/rv1106_coolpicp1b_defconfig
> 
> I wonder how similar the RV1106 SoC is to the RV1103 you're working on ?

Given that the devicetree for RV1103 in Rockchip downstream kernel tree
includes RV1106's devicetree[1] and only adds some overrides, I'd like
to say RV1103 is basically only in a different package. They're likely
the same silicon, probably with different qualities.

> I only ask since the RV1106 SoC has a similar prefix to the RV1103. I don't have any other information about the SoC.
> 
> 
> Cheers!
> 
> Chris

Regards,
Yao Zi

[1]: https://github.com/rockchip-linux/kernel/blob/1ba51b059f25533c5529b7f68186190b47d6a7b3/arch/arm/boot/dts/rockchip/rv1103.dtsi#L6