linux-kernel - Re: [PATCH 3/4] dt-bindings: drm/bridge: anx7625: Change bus-type to 7 (DPI)

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Message-ID: <20220414022655.GA606685@anxtwsw-Precision-3640-Tower>
Date:   Thu, 14 Apr 2022 10:26:55 +0800
From:   Xin Ji <xji@...logixsemi.com>
To:     Robert Foss <robert.foss@...aro.org>
Cc:     Rob Herring <robh@...nel.org>,
        Andrzej Hajda <andrzej.hajda@...el.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>, bliang@...logixsemi.com,
        qwen@...logixsemi.com, dri-devel@...ts.freedesktop.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/4] dt-bindings: drm/bridge: anx7625: Change bus-type to
 7 (DPI)

On Wed, Apr 13, 2022 at 04:28:51PM +0200, Robert Foss wrote:
> On Sat, 9 Apr 2022 at 06:47, Xin Ji <xji@...logixsemi.com> wrote:
> >
> > On Mon, Apr 04, 2022 at 12:52:14PM -0500, Rob Herring wrote:
> > > On Mon, Mar 28, 2022 at 08:09:54PM +0800, Xin Ji wrote:
> > > > Change bus-type define for DPI.
> > > >
> > > > Fixes: a43661e7e819 ("dt-bindings:drm/bridge:anx7625:add vendor define")
> > > >
> > > > Signed-off-by: Xin Ji <xji@...logixsemi.com>
> > > > ---
> > > >  .../devicetree/bindings/display/bridge/analogix,anx7625.yaml  | 4 ++--
> > > >  1 file changed, 2 insertions(+), 2 deletions(-)
> > > >
> > > > diff --git a/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml b/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
> > > > index 0d38d6fe3983..4590186c4a0b 100644
> > > > --- a/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
> > > > +++ b/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
> > > > @@ -106,7 +106,7 @@ properties:
> > > >                remote-endpoint: true
> > > >
> > > >                bus-type:
> > > > -                enum: [1, 5]
> > > > +                enum: [7]
> > >
> > > Changing is an ABI break, but didn't we revert adding this?
> > Hi Rob, sorry, what do you mean about ABI break? Do I need remove this
> > patch in this serial? Or do I need revert patch
> > https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fpatchwork.freedesktop.org%2Fpatch%2F462331%2F&amp;data=04%7C01%7Cxji%40analogixsemi.com%7C10f5b0213f434592936008da1d59f566%7Cb099b0b4f26c4cf59a0fd5be9acab205%7C0%7C0%7C637854569490105386%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=vK0Vmb9S425kHZc1WurfnNhnoXDMbUGkkdY1PVnfS9g%3D&amp;reserved=0, I don't know how to do
> > it.
> >
> 
> I contributed to the confusion about this, let's see if we can clear it up.
> 
> An issue was found related to which enum values were used to represent
> what late in the last release cycle. As a result a revert[1] patch for
> everything touching bus-type in anx7625 was merged.
> 
> This patch, does not apply to drm-misc-next due to the revert, and if
> Xin Ji rebases his work on the drm-misc-next there should be no
> ABI-change as this patch when fixed up will introduce bus-type to the
> nax7625 ABI.
> 
> Xin: Does this make sense to you?
Hi Robert Foss, yes, my work is based on drm-misc-next, all I can do,
just make a fix up patch(this patch) to change the bus-type define.

Thanks,
Xin
> 
> [1] https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fcgit.freedesktop.org%2Fdrm%2Fdrm-misc%2Fcommit%2F%3Fid%3D979452fbc43028675b5a5da156f91928b739dea8&amp;data=04%7C01%7Cxji%40analogixsemi.com%7C10f5b0213f434592936008da1d59f566%7Cb099b0b4f26c4cf59a0fd5be9acab205%7C0%7C0%7C637854569490105386%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=onmKAoEEP1XDbl%2FaeAIfVYJ4cSbiTfTBYCd%2BHCA9fzw%3D&amp;reserved=0