linux-kernel - Re: [PATCH v4 00/13] Add ITE IT6263 LVDS to HDMI converter support

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Message-ID: <5ycxltnw3vhik3iype6ncuh4nelwwtom745o5dlf32qyiqh5bv@yjj5l6kb2psm>
Date: Mon, 28 Oct 2024 14:19:21 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Biju Das <biju.das.jz@...renesas.com>
Cc: Liu Ying <victor.liu@....com>, 
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Subject: Re: [PATCH v4 00/13] Add ITE IT6263 LVDS to HDMI converter support

On Mon, Oct 28, 2024 at 11:12:00AM +0000, Biju Das wrote:
> Hi Dmitry, Liu,
> 
> > -----Original Message-----
> > From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> > Sent: 28 October 2024 10:20
> > Subject: Re: [PATCH v4 00/13] Add ITE IT6263 LVDS to HDMI converter support
> > 
> > Hi,
> > 
> > On Mon, 28 Oct 2024 at 04:37, Liu Ying <victor.liu@....com> wrote:
> > >
> > > Hi,
> > >
> > > This patch series aims to add ITE IT6263 LVDS to HDMI converter on
> > > i.MX8MP EVK.  Combined with LVDS receiver and HDMI 1.4a transmitter,
> > > the IT6263 supports LVDS input and HDMI 1.4 output by conversion
> > > function.  IT6263 product link can be found at [1].
> > >
> > > Patch 1 is a preparation patch to allow display mode of an existing
> > > panel to pass the added mode validation logic in patch 3.
> > >
> > > Patch 2 allows i.MX8MP LVDS Display Bridge(LDB) bridge driver to find
> > > the next non-panel bridge, that is the IT6263 in this case.
> > >
> > > Patch 3 adds mode validation logic to i.MX8MP LDB bridge driver
> > > against "ldb" clock so that it can filter out unsupported display
> > > modes read from EDID.
> > >
> > > Patch 4 adds MEDIA_BUS_FMT_RGB101010_1X7X5_{SPWG,JEIDA} support, as
> > > they are supported by IT6263(with LVDS data bit reversed order).
> > >
> > > Patch 5 makes drm_of.c use MEDIA_BUS_FMT_RGB101010_1X7X5_{JEIDA,SPWG}.
> > >
> > > Patch 6 supports getting dual-link LVDS pixel order for the sink side
> > > as needed by IT6263 driver.
> > >
> > > Patch 7 documents jeida-30 and vesa-30 data mappings in
> > > lvds-data-mapping.yaml, as needed by IT6263 DT binding.
> > >
> > > Patch 8 extracts common dual-link LVDS display properties into new
> > > lvds-dual-ports.yaml so that IT6263 DT binding can reference it.
> > >
> > > Patch 9 adds DT binding for IT6263.
> > >
> > > Patch 10 adds IT6263 bridge driver.  Only video output is supported.
> > >
> > > Patch 11 adds DT overlays to support NXP adapter cards[2][3] with
> > > IT6263 populated.
> > >
> > > Patch 12 enables the IT6263 bridge driver in defconfig.
> > >
> > > Patch 13 updates MAINTAINERS to add maintainer for IT6263 driver.
> > 
> > This has pretty complicated structure from the merging point of view.
> > 
> > I propose we take patches 6, 8, 9 (without 30-bit formats, they can be dropped while applying), 11, 12
> > (?) and 13 through drm-misc in one batch (once DT maintainers review the binding parts). This looks
> > like a minimal set, having no extra dependencies.
> 
> > 
> > The second set might be 4, 5 + new patch, re-adding 30-bit formats to
> > IT6263 binding (no driver changes are necessary). This can go in separately, after an Ack from media
> > maintainers.
> > 
> > Of course both sets can go together if linux-media maintainers reacts quickly and ack merging media-
> > formats patch through drm-misc tree.
> > 
> > The rest of the patches don't have such strong dependencies and go in once ready / reviewed.
> > 
> > WDYT?
> 
> I guess, 6,8,9(without 30-bit formats), 10, 12 and 13.
> 
> 11 may have dependency on 1, 2 and 3 as it is SoC specific.

Yes, of course, 10, not 11.

> Then 4, 5 + new patch, re-adding 30-bit formats to IT6263 binding.

-- 
With best wishes
Dmitry