[PATCH v2] drm/imagination: DRM_POWERVR should depend on ARCH_K3

[Frank Binns]

Hi Adam,

Sorry for not responding sooner. I've recently just returned from paternity
leave, so just catching up on everything.

On Thu, 2024-02-15 at 11:22 -0600, Adam Ford wrote:
> On Thu, Feb 15, 2024 at 11:10 AM Adam Ford <aford173 at gmail.com> wrote:
> > On Thu, Feb 15, 2024 at 10:54 AM Geert Uytterhoeven
> > <geert at linux-m68k.org> wrote:
> > > Hi Maxime,
> > > 
> > > On Thu, Feb 15, 2024 at 5:18 PM Maxime Ripard <mripard at kernel.org> wrote:
> > > > On Thu, Feb 15, 2024 at 01:50:09PM +0100, Geert Uytterhoeven wrote:
> > > > > Using the Imagination Technologies PowerVR Series 6 GPU requires a
> > > > > proprietary firmware image, which is currently only available for Texas
> > > > > Instruments K3 AM62x SoCs.  Hence add a dependency on ARCH_K3, to
> > > > > prevent asking the user about this driver when configuring a kernel
> > > > > without Texas Instruments K3 Multicore SoC support.
> > > > 
> > > > This wasn't making sense the first time you sent it, and now that commit
> > > > log is just plain wrong. We have firmwares for the G6110, GX6250,
> > > > GX6650, BXE-4-32, and BXS-4-64 models, which can be found on (at least)
> > > > Renesas, Mediatek, Rockchip, TI and StarFive, so across three
> > > 
> > > I am so happy to be proven wrong!
> > > Yeah, GX6650 is found on e.g. R-Car H3, and GX6250 on e.g. R-Car M3-W.
> > > 
> > > > architectures and 5 platforms. In two months.
> > > 
> > > That sounds like great progress, thanks a lot!
> > > 
> > Geert,
> > 
> > > Where can I find these firmwares? Linux-firmware[1] seems to lack all
> > > but the original K3 AM62x one.
> > 
> > I think PowerVR has a repo [1], but the last time I checked it, the
> > BVNC for the firmware didn't match what was necessary for the GX6250
> > on the RZ/G2M.  I can't remember what the corresponding R-Car3 model
> > is.  I haven't tried recently because I was told more documentation
> > for firmware porting would be delayed until everything was pushed into
> > the kernel and Mesa.  Maybe there is a better repo and/or newer
> > firmware somewhere else.
> > 
> I should have doubled checked the repo contents before I sent my last
> e-mail , but it appears the firmware  [2] for the RZ/G2M, might be
> present now. I don't know if there are driver updates necessary. I
> checked my e-mails, but I didn't see any notification, or I would have
> tried it earlier.  Either way, thank you Frank for adding it.  I'll
> try to test when I have some time.
> 

You may have noticed from one of Matt's emails that we now have a set of repos
(linux, linux-firmware and Mesa) in our own area on freedesktop.org GitLab:
https://gitlab.freedesktop.org/imagination/

We'll be using this as a staging area for work that isn't ready to be upstreamed
yet (including firmware binaries).


> > adam
> > 
> > [1] https://gitlab.freedesktop.org/frankbinns/linux-firmware/-/tree/powervr/powervr?ref_type=heads
> 
> [2] - https://gitlab.freedesktop.org/frankbinns/linux-firmware/-/commit/fecb3caebf29f37221fe0a20236e5e1415d39d0b
> 

This is now the place to get the firmware for devices that aren't yet supported
upstream:
https://gitlab.freedesktop.org/imagination/linux-firmware/-/commits/powervr/?ref_type=HEADS

With the firmware for the Renesas variant of GX6250 being found in this commit:
https://gitlab.freedesktop.org/imagination/linux-firmware/-/commit/fecb3caebf29f37221fe0a20236e5e1415d39d0b

Thanks
Frank

> > 
> > > Thanks again!
> > > 
> > > [1] https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/
> > > 
> > > Gr{oetje,eeting}s,
> > > 
> > >                         Geert
> > > 
> > > --
> > > Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org
> > > 
> > > In personal conversations with technical people, I call myself a hacker. But
> > > when I'm talking to journalists I just say "programmer" or something like that.
> > >                                 -- Linus Torvalds