etnaviv-gpu 134000.gpu: MMU fault status 0x00000002 on i.XM6 Quad Plus

[Fabio Estevam]

Hi Luís,

On Fri, Aug 25, 2017 at 4:24 PM, Luís Mendes <luis.p.mendes at gmail.com> wrote:
> Hi Fabio,
>
> I've found the root kernel change responsible for the complete image
> corruption on i.MX6 Quad Plus.
> It happened between kernel 4.11.x and kernel 4.12.0-rc1, it is the commit:
>
> https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit/?h=v4.12-rc1&id=2f34c1231bfc9f2550f934acb268ac7315fb3837
>
> imx-drm: - Prefetch Resolve Engine/Gasket on i.MX6QP
>               - Deferred plane disabling
>               - Separate alpha support
>
> I've removed the files ipu-pre.c and ipu-prg.c from
> drivers/gpu/ipu-v3/Makefile and all references to it from
> drivers/gpu/ipu-v3/ipu-common.c and from drivers/gpu/drm/imx/ipuv3-crtc.c
> and drivers/gpu/drm/imx/ipuv3-plane.c.
>
> The recompiled kernel and modules after such code removal restores the
> correct penguin logos images per each cpu core during Linux boot as well as
> the X login screen after booting into Ubuntu MATE 17.04.
>
> There's something that is still missing with the IPU-V3 pre(fetch) and prg
> code.

When you run 4.12 do you also rebuild the dtb? The pre and prg nodes
have been added in 4.12, so please make sure you are also rebuilding
the dtb.