linux-kernel - Re: [PATCH 04/14] dt-bindings: display: bridge: Add i.MX8qm/qxp pixel combiner binding

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Date:   Mon, 21 Dec 2020 10:02:17 -0700
From:   Rob Herring <robh@...nel.org>
To:     Liu Ying <victor.liu@....com>
Cc:     dri-devel <dri-devel@...ts.freedesktop.org>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Andrzej Hajda <a.hajda@...sung.com>, Vinod <vkoul@...nel.org>,
        Linux Media Mailing List <linux-media@...r.kernel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        David Airlie <airlied@...ux.ie>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        devicetree@...r.kernel.org, Sascha Hauer <kernel@...gutronix.de>,
        Jonas Karlman <jonas@...boo.se>,
        Fabio Estevam <festevam@...il.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Shawn Guo <shawnguo@...nel.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        NXP Linux Team <linux-imx@....com>,
        Kishon Vijay Abraham I <kishon@...com>
Subject: Re: [PATCH 04/14] dt-bindings: display: bridge: Add i.MX8qm/qxp pixel
 combiner binding

On Fri, Dec 18, 2020 at 9:15 PM Liu Ying <victor.liu@....com> wrote:
>
> Hi,
>
> On Fri, 2020-12-18 at 16:42 -0600, Rob Herring wrote:
> > On Thu, Dec 17, 2020 at 7:48 PM Liu Ying <victor.liu@....com> wrote:
> > >
> > > Hi,
> > >
> > > On Thu, 2020-12-17 at 12:50 -0600, Rob Herring wrote:
> > > > On Thu, 17 Dec 2020 17:59:23 +0800, Liu Ying wrote:
> > > > > This patch adds bindings for i.MX8qm/qxp pixel combiner.
> > > > >
> > > > > Signed-off-by: Liu Ying <victor.liu@....com>
> > > > > ---
> > > > >  .../display/bridge/fsl,imx8qxp-pixel-combiner.yaml | 160
> > > > > +++++++++++++++++++++
> > > > >  1 file changed, 160 insertions(+)
> > > > >  create mode 100644
> > > > > Documentation/devicetree/bindings/display/bridge/fsl,imx8qxp-
> > > > > pixel-combiner.yaml
> > > > >
> > > >
> > > > My bot found errors running 'make dt_binding_check' on your
> > > > patch:
> > > >
> > > > yamllint warnings/errors:
> > > >
> > > > dtschema/dtc warnings/errors:
> > > > Documentation/devicetree/bindings/display/bridge/fsl,imx8qxp-
> > > > pixel-combiner.example.dts:19:18: fatal error: dt-
> > > > bindings/clock/imx8-lpcg.h: No such file or directory
> > > >    19 |         #include <dt-bindings/clock/imx8-lpcg.h>
> > > >       |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > > > compilation terminated.
> > > > make[1]: *** [scripts/Makefile.lib:342:
> > > > Documentation/devicetree/bindings/display/bridge/fsl,imx8qxp-
> > > > pixel-combiner.example.dt.yaml] Error 1
> > > > make[1]: *** Waiting for unfinished jobs....
> > > > make: *** [Makefile:1364: dt_binding_check] Error 2
> > > >
> > > > See
> > > > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fpatchwork.ozlabs.org%2Fpatch%2F1417599&amp;data=04%7C01%7Cvictor.liu%40nxp.com%7C96806e0ce6bc40c936fa08d8a3a64551%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C637439281816690986%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=Cjyszb0alRE5z2OGKdZZEg5PQpH11U%2BGqVt6couCLGE%3D&amp;reserved=0
> > > >
> > > > This check can fail if there are any dependencies. The base for a
> > > > patch
> > > > series is generally the most recent rc1.
> > >
> > > This series can be applied to linux-next/master branch.
> >
> > I can't know that to apply and run checks automatically. I guessed
> > that reviewing this before sending, but I want it abundantly clear
> > what the result of applying this might be and it wasn't mentioned in
> > this patch.
> >
> > Plus linux-next is a base no one can apply patches to, so should you
> > be sending patches based on it? It's also the merge window, so maybe
>
> I sent this series based on drm-misc-next.  This series is applicable
> to linux-next/master, and may pass 'make dt_binding_check' there.

But to be clear, 'make dt_binding_check' would fail on drm-misc-next
until 5.11-rc1 is merged in. The drm-misc maintainers need to know
that.


> I'll mention dependencies in the future where similar situations
> appear. Thanks.
>
> BTW, does it make sense for the bot to additionaly try linux-next if
> needed?  Maybe, that'll be helpful?

Sure, and when I've got nothing else to do maybe I'll do that. Though
maintainers still need to know what the dependencies are. The real
solution here is to make 'base-commit' tags more common or required so
that neither scripts/bots nor humans have to guess what the base is.

Rob