linux-kernel - Re: [PATCH 2/6] drm: ci: Force db410c to host mode

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Message-ID: <CAF6AEGsdR4XMQ73mwNEE-fntPFLbQrxmzdoWchjReoVXKexdVw@mail.gmail.com>
Date:   Fri, 25 Aug 2023 07:41:19 -0700
From:   Rob Clark <robdclark@...il.com>
To:     Helen Mae Koike Fornazier <helen.koike@...labora.com>
Cc:     Jani Nikula <jani.nikula@...ux.intel.com>,
        Vignesh Raman <vignesh.raman@...labora.com>,
        dri-devel@...ts.freedesktop.org, emma@...olt.net,
        linux-doc@...r.kernel.org, david.heidelberg@...labora.com,
        linux-amlogic@...ts.infradead.org, jbrunet@...libre.com,
        robdclark@...gle.com, corbet@....net, khilman@...libre.com,
        sergi.blanch.torne@...labora.com, gustavo.padovan@...labora.com,
        linux-rockchip@...ts.infradead.org, daniels@...labora.com,
        martin.blumenstingl@...glemail.com, robclark@...edesktop.org,
        anholt@...gle.com, linux-mediatek@...ts.infradead.org,
        mripard@...nel.org, matthias.bgg@...il.com,
        linux-arm-kernel@...ts.infradead.org,
        angelogioacchino.delregno@...labora.com, neil.armstrong@...aro.org,
        guilherme.gallo@...labora.com, linux-kernel@...r.kernel.org,
        tzimmermann@...e.de
Subject: Re: [PATCH 2/6] drm: ci: Force db410c to host mode

On Fri, Aug 25, 2023 at 7:34 AM Helen Mae Koike Fornazier
<helen.koike@...labora.com> wrote:
>
> On Friday, August 25, 2023 11:30 -03, Rob Clark <robdclark@...il.com> wrote:
>
> > On Fri, Aug 25, 2023 at 6:56 AM Jani Nikula <jani.nikula@...ux.intel.com> wrote:
> > >
> > > On Fri, 25 Aug 2023, Vignesh Raman <vignesh.raman@...labora.com> wrote:
> > > > Force db410c to host mode to fix network issue which results in failure
> > > > to mount root fs via NFS.
> > > > See https://gitlab.freedesktop.org/gfx-ci/linux/-/commit/cb72a629b8c15c80a54dda510743cefd1c4b65b8
> > > >
> > > > Since this fix is not sent upstream, add it to build.sh script
> > > > before building the kernel and dts. Better approach would be
> > > > to use devicetree overlays.
> > > >
> > > > Signed-off-by: Vignesh Raman <vignesh.raman@...labora.com>
> > > > ---
> > > >  drivers/gpu/drm/ci/build.sh | 4 ++++
> > > >  1 file changed, 4 insertions(+)
> > > >
> > > > diff --git a/drivers/gpu/drm/ci/build.sh b/drivers/gpu/drm/ci/build.sh
> > > > index 7b014287a041..c39834bd6bd7 100644
> > > > --- a/drivers/gpu/drm/ci/build.sh
> > > > +++ b/drivers/gpu/drm/ci/build.sh
> > > > @@ -70,6 +70,10 @@ if [ -z "$CI_MERGE_REQUEST_PROJECT_PATH" ]; then
> > > >      fi
> > > >  fi
> > > >
> > > > +# Force db410c to host mode to fix network issue which results in failure to mount root fs via NFS.
> > > > +# See https://gitlab.freedesktop.org/gfx-ci/linux/-/commit/cb72a629b8c15c80a54dda510743cefd1c4b65b8
> > > > +sed -i '/&usb {/,/status = "okay";/s/status = "okay";/&\n\tdr_mode = "host";/' arch/arm64/boot/dts/qcom/apq8016-sbc.dts
> > > > +
> > >
> > > It seems like a really bad idea to me to have the CI build modify the
> > > source tree before building.
> > >
> > > The kernel being built will have a dirty git repo, and the localversion
> > > will have -dirty in it.
> > >
> > > I think it would be better to do out-of-tree builds and assume the
> > > source is read-only.
> >
> > We have the ${target_branch}-external-fixes mechanism to merge
> > necessary changes before building the kernel for CI.  Which is
> > necessary for a couple of reasons:
>
> Should we create an official topic/drm-ci-external-fixes branch ?

Hmm, maybe.. I guess as we expand this to more driver trees, and want
to be able to re-run CI in the drm tree after merges to
drm-next/drm-fixes, we maybe want to have central
drm-next-external-fixes and drm-fixes-external-fixes.  I guess we can
keep those based on drm-next and drm-fixes?  And if there would be
conflicts because, say, ${driver}-next is behind drm-next, then
${driver}-next could be rebased on drm-next?

BR,
-R

> Regards,
> Helen
>
> >
> > 1) patches like this which aren't appropriate upstream but necessary
> > due to the CI lab setup
> > 2) target branch if often based on an early -rc, and it isn't unheard
> > of to need some fix for some board or another which isn't appropriate
> > to land via drm-next
> >
> > We should use the -external-fixes branch mechanism for patches like this one.
> >
> > BR,
> > -R
> >
> > > >  for opt in $ENABLE_KCONFIGS; do
> > > >    echo CONFIG_$opt=y >> drivers/gpu/drm/ci/${KERNEL_ARCH}.config
> > > >  done
> > >
> > > Ditto for the config changes in the context here. Those are files in
> > > git, don't change them.
> > >
> > > Shouldn't this use something like 'scripts/config --enable' or
> > > 'scripts/config --disable' on the .config file to be used for building
> > > instead?
> > >
> > >
> > > BR,
> > > Jani.
> > >
> > >
> > > --
> > > Jani Nikula, Intel Open Source Graphics Center
>