Re: [PATCH] drm: verisilicon: support non-coherent DMA framebuffers

[Dominique Belhachemi]

On Fri, Sep 11, 2026 at 11:33 AM Icenowy Zheng <zhengxingda@xxxxxxxxxxx> wrote:
>
> I am still thinking how to decide whether to use dirty-tracking-based
> cache coherent maintenance or writecombine/uncached mapping.
>
Hi Icenowy,

I looked into this again and writecombine/uncached mapping is the way to go.
I used Bo Gan's XPbmtUC series and Michal Wilczynski's jh7110 display
series and finally got the integrated BXE-4-32 GPU to work.

https://lore.kernel.org/all/20260316060328.1173634-1-ganboing@xxxxxxxxx/
https://lore.kernel.org/all/20260915-jh7110-clean-send-v4-0-f0e4fd6f2cc8@xxxxxxxxxxx/
https://github.com/domibel/visionfive2_gpu_bringup

Best
-Dominique