On Wed, May 6, 2026 at 1:14 PM Icenowy Zheng <[email protected]> wrote: > > 在 2026-05-05二的 18:25 -0400，Dominique Belhachemi写道： > > On Tue, May 5, 2026 at 5:03 AM Icenowy Zheng > > <[email protected]> wrote: > > > > > > 在 2026-05-05二的 04:26 +0000，Dominique Belhachemi写道： > > > > Wire up the standard non-coherent path matching the ingenic DRM > > > > driver. > > > > > > > > Tested on StarFive JH7110 (VisionFive 2 v1.3B). > > > > > > Interesting, I am curious about other patches added to test this. > > > > > Hi, > > > > I tested this on Debian unstable with a slightly patched 7.0.3 kernel > > [1]. > > The test branch contains your verisilicon series, Michal's JH7110 > > display series [2], > > and a JH7110 ccache change [3], which was also required to > > communicate > > with the BXE-4-32 firmware [4]. > > BTW did you run any rendering? I think the way currently powervr open > source driver works requires "coherent memory" (although it's usually > implemented as uncached memory).
Yes, GPU dispatches run with [4]. Compute shaders run fine, but rendering crashes after a few frames. > > > > This change here is only used to remove the ugly framebuffer stripes > > on the console and in the desktop environment. > > But I still think it'd be better to implement proper uncached memory > support instead of flushing caches with dirty tracking. Maybe, this patch is just a working alternative. Dominique > > > > [1] https://github.com/domibel/linux/tree/jh7110_dc8200_hdmi_v7.0.3 > > [2] > > https://lore.kernel.org/lkml/[email protected]/ > > [3] > > https://lore.kernel.org/lkml/[email protected]/ > > [4] > > https://github.com/domibel/linux/tree/powervr_on_jh7110_visionfive2_v7.0.3 > > The POW_RASCALDUST thing looks quite interesting, maybe I should > investigate it further. > > Thanks, > Icenowy > > > > Dominique > >
