Problem IMX8MN booting legacy kernel and mipi display

[Adam Ford]

On Sun, Feb 13, 2022 at 10:27 AM Michael Nazzareno Trimarchi
<michael at amarulasolutions.com> wrote:
>
> Hi Adam
>
> On Sun, Feb 13, 2022 at 5:03 PM Adam Ford <aford173 at gmail.com> wrote:
> >
> > On Sat, Feb 12, 2022 at 1:27 PM Michael Nazzareno Trimarchi
> > <michael at amarulasolutions.com> wrote:
> > >
> > > Hi Tim
> > >
> > > You are using the imx8mm. I have problems on imx8mn. It's like some
> > > part is not implemented. Time to time power domain timeout if I
> > > enabled
> > > mipi pipeline
> >
> > If you're using ATF from its mainline branch, it likely does not have
> > the power domain code enabled, so many peripherals (including DSI and
> > CSI) likely won't work.
> >
> > The power-domain code would be located in gpc.v [1], but as far as I
> > know, attempts to push that upstream were abandoned in favor of having
> > Linux do the power domain stuff, so to use NXP's kernel, you'll need
> > NXP's ATF.
> >
> > [1] - https://source.codeaurora.org/external/imx/imx-atf/tree/plat/imx/imx8m/imx8mn/gpc.c?h=lf_v2.4
> >
>
> I;m working on mainline on each component. I was thinking that
> blk-ctrl do the stuff there

When I did the blk-ctrl porting to the Nano, we didn't have a
functional DSI driver, so I did what I thought was best based on the
limited information I had and I had no way to test it. I know several
others have attempted various driver ports, but I don;t know which one
you're trying to use.  If you have a repo that you're using, I can try
to take a look at it.

adam
>
> Michael
> > adam
> > >
> > > Michael
> > >
> > > On Wed, Feb 2, 2022 at 4:54 PM Tim Harvey <tharvey at gateworks.com> wrote:
> > > >
> > > > 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
> > >
> > >
> > >
> > > --
> > > Michael Nazzareno Trimarchi
> > > Co-Founder & Chief Executive Officer
> > > M. +39 347 913 2170
> > > michael at amarulasolutions.com
> > > __________________________________
> > >
> > > Amarula Solutions BV
> > > Joop Geesinkweg 125, 1114 AB, Amsterdam, NL
> > > T. +31 (0)85 111 9172
> > > info at amarulasolutions.com
> > > www.amarulasolutions.com
>
>
>
> --
> Michael Nazzareno Trimarchi
> Co-Founder & Chief Executive Officer
> M. +39 347 913 2170
> michael at amarulasolutions.com
> __________________________________
>
> Amarula Solutions BV
> Joop Geesinkweg 125, 1114 AB, Amsterdam, NL
> T. +31 (0)85 111 9172
> info at amarulasolutions.com
> www.amarulasolutions.com