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Date: Fri, 16 Feb 2024 10:05:27 +0100
From: Maxime Ripard <mripard@kernel.org>
To: Biju Das <biju.das.jz@bp.renesas.com>
Cc: Adam Ford <aford173@gmail.com>, 
	Geert Uytterhoeven <geert@linux-m68k.org>, Frank Binns <frank.binns@imgtec.com>, 
	Matt Coster <matt.coster@imgtec.com>, Maarten Lankhorst <maarten.lankhorst@linux.intel.com>, 
	Thomas Zimmermann <tzimmermann@suse.de>, David Airlie <airlied@gmail.com>, 
	Daniel Vetter <daniel@ffwll.ch>, Sarah Walker <sarah.walker@imgtec.com>, 
	"dri-devel@lists.freedesktop.org" <dri-devel@lists.freedesktop.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, 
	Javier Martinez Canillas <javierm@redhat.com>, Nishanth Menon <nm@ti.com>, 
	Marek Vasut <marek.vasut@mailbox.org>, Linux-Renesas <linux-renesas-soc@vger.kernel.org>
Subject: Re: RE: [PATCH v2] drm/imagination: DRM_POWERVR should depend on
 ARCH_K3
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On Fri, Feb 16, 2024 at 08:47:46AM +0000, Biju Das wrote:
> Hi Adam Ford,
>=20
> > -----Original Message-----
> > From: Adam Ford <aford173@gmail.com>
> > Sent: Thursday, February 15, 2024 11:36 PM
> > Subject: Re: [PATCH v2] drm/imagination: DRM_POWERVR should depend on
> > ARCH_K3
> >=20
> > On Thu, Feb 15, 2024 at 11:22=E2=80=AFAM Adam Ford <aford173@gmail.com>=
 wrote:
> > >
> > > On Thu, Feb 15, 2024 at 11:10=E2=80=AFAM Adam Ford <aford173@gmail.co=
m> wrote:
> > > >
> > > > On Thu, Feb 15, 2024 at 10:54=E2=80=AFAM Geert Uytterhoeven
> > > > <geert@linux-m68k.org> wrote:
> > > > >
> > > > > Hi Maxime,
> > > > >
> > > > > On Thu, Feb 15, 2024 at 5:18=E2=80=AFPM Maxime Ripard <mripard@ke=
rnel.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.
> > >
> >=20
> > I don't have the proper version of Mesa setup yet, but for what it's
> > worth, the firmware loads without error, and it doesn't hang.
>=20
> Based on [1] and [2],
>=20
> kmscube should work on R-Car as it works on RZ/G2L with panfrost as earli=
er version of RZ/G2L
> which uses drm based on RCar-Du, later changed to rzg2l-du.

IIRC, the mesa support isn't there yet for kmscube to start.

Maxime

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