Problem IMX8MN booting legacy kernel and mipi display

[Tim Harvey]

On Wed, Feb 2, 2022 at 5:04 AM Michael Nazzareno Trimarchi
<michael at amarulasolutions.com> wrote:
>
> Hi Adam
>
> On Wed, Feb 2, 2022 at 2:02 PM Adam Ford <aford173 at gmail.com> wrote:
> >
> > On Wed, Feb 2, 2022 at 6:24 AM Michael Nazzareno Trimarchi
> > <michael at amarulasolutions.com> wrote:
> > >
> > > Hi all
> > >
> > > I have now able to pack those combination and all of them look ok
> > >
> > > - mainline uboot
> > > - optee 3.15.0
> > > - atf 2.5
> > > - mainline kernel
> > >
> > > - mainline uboot
> > > - optee 3.15.0
> > > - imx-atf rel_imx_5.4.70_2.3.2
> > > - Linux rel_imx_5.4.70_2.3.2
> > >
> > > I have a setup where I can test some peripherals. I can run an optee
> > > test on both combinations
> > > The big issue I have it's the DSIM display it's not working and
> > > crashes the kernel using the rel_imx_5.4.70_2.3.2 nxp version. The
> > > mipi
> > > randomly deadlock the booting. If I don't register the mipi part it's
> > > ok. Can someone have an idea?
> >
> > Are you using the  Linux rel_imx_5.4.70_2.3.2 with imx-atf rel_imx_5.4.70_2.3.2?
> >
> > The NXP kernel expects the NXP ATF code.  The power-domain drivers in
> > the NXP branch make secure calls to ATF which enable/disable the
> > power-domains which control a bunch of peripherals like DSI, CSI, USB
> > and GPU.  If you're using the mainline ATF, I don't believe it
> > contains the power-domain controllers, so when the Linux power-domain
> > drivers make the secure calls, it's likely the power-domains won't
> > change.
>
> - mainline uboot
> - optee 3.15.0
> - imx-atf rel_imx_5.4.70_2.3.2
> - Linux rel_imx_5.4.70_2.3.2
>
> I have tried even to not load optee in the image but still the same
>
> Michael
> >
> > adam
> > >
> > > All of them can be test using a buildroot setup
> > >
> > > Michael
>

Michael,

I have not bothered with NXP's kernel, but I do have DSIM working on
5.15 with a set of patches here
https://github.com/Gateworks/linux-venice if it is helpful. I've been
using this with a mainline U-Boot, imx-atf lf_v2.4.

Tim