[PATCH v6 00/12] Rockchip VOP2 support

[Peter Robinson]

On Thu, 8 Jan 2026 at 22:18, Stefan Monnier <monnier at iro.umontreal.ca> wrote:
>
> Dang Huynh via B4 Relay [2025-11-08 12:37:56] wrote:
> > This series adds VOP2 support to U-Boot and enable it for PineTab2.
> > HDMI should work flawlessly but there's still some timings issue with
> > DW MIPI DSI, perhaps that's something to look into later.
>
> I'm trying to use this patch on my NanoPi R5S and the result is not
> quite what I expect.  I suspect I'm doing something wrong.
>
> I applied the above patch to the tip of the current u-boot (there was
> a trivial conflict in a Makefile, but nothing of significance).
> Then I applied the following patch:
>
>     diff --git a/configs/nanopi-r5s-rk3568_defconfig b/configs/nanopi-r5s-rk3568_defconfig
>     index 1653ab8b44f..d707dd5bc29 100644
>     --- a/configs/nanopi-r5s-rk3568_defconfig
>     +++ b/configs/nanopi-r5s-rk3568_defconfig
>     @@ -56,6 +56,7 @@ CONFIG_DWC_ETH_QOS_ROCKCHIP=y
>      CONFIG_RTL8169=y
>      CONFIG_NVME_PCI=y
>      CONFIG_PCIE_DW_ROCKCHIP=y
>     +CONFIG_PHY_ROCKCHIP_INNO_HDMI=y
>      CONFIG_PHY_ROCKCHIP_INNO_USB2=y
>      CONFIG_PHY_ROCKCHIP_NANENG_COMBOPHY=y
>      CONFIG_SPL_PINCTRL=y
>     @@ -80,4 +81,12 @@ CONFIG_SPL_USB_DWC3_GENERIC=y
>      CONFIG_USB_GADGET=y
>      CONFIG_USB_GADGET_DOWNLOAD=y
>      CONFIG_USB_FUNCTION_ROCKUSB=y
>     +CONFIG_USB_KEYBOARD=y
>     +CONFIG_VIDEO=y
>     +CONFIG_DISPLAY=y
>     +CONFIG_VIDEO_ROCKCHIP=y
>     +CONFIG_DISPLAY_ROCKCHIP_HDMI=y
>     +CONFIG_VIDEO_DT_SIMPLEFB=y
>     +CONFIG_VIDEO_BRIDGE=y
>     +CONFIG_VIDEO_REMOVE=y
>      CONFIG_ERRNO_STR=y
>
> I also changed the U-Boot config to extend the autoboot timeout to 30s,
> so I have plenty of time to hit a key on the keyboard.
>
> and the result is as follows:
>
> - A U-Boot logo greets me at the top-right corner of the screen.
>   I'm really happy to see this logo, shows something is right with the
>   HDMI code&config.
> - The rest is all black, no text.
> - Hitting a key on the USB-connected keyboard seems to have no effect:
>   the screen stays desperately all black except for the U-Boot logo.
> - After the 30s timeout, the system boots as usual.
>
> I tried to disconnect&reconnect the keyboard as well as tried both USB
> ports on the device.  Same difference.  Why do I get to see the U-Boot
> logo but not the usual bootup text?

I suspect you have two problems.

For the lack of text being displayed can you check if you have
CONFIG_SPLASH_SCREEN=y in your .config? That will suppress all the
text. Try a '# CONFIG_SPLASH_SCREEN is not set' line in the config to
see if that helps.

For the USB I have seen issues on and off with rockchips devices.
Adding the following might be a good debug to ensure it runs and scans
the USB bus:

CONFIG_USE_PREBOOT=y
CONFIG_PREBOOT="usb start;"

If you have a USB TTL you should be able to see it all on serial
console no matter what gets displayed on HDMI.

Peter