Re: drm/bridge: Synopsys DW-HDMI bridge driver for the Ingenic JZ4780 (was Re: Specialising the Synopsys DW-HDMI bridge driver for the Ingenic JZ4780)

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On Thu, 10 Sep 2020 at 04:54, H. Nikolaus Schaller <hns@xxxxxxxxxxxxx> wrote:
>
> Hi Ezequiel,
>
> > Am 27.08.2020 um 09:21 schrieb H. Nikolaus Schaller <hns@xxxxxxxxxxxxx>:
> >
> > Hi Ezequiel,
> >
> >> Am 24.08.2020 um 19:38 schrieb Ezequiel Garcia <ezequiel@xxxxxxxxxxxxxxxxxxxx>:
> >>
> >> On Mon, 24 Aug 2020 at 13:05, H. Nikolaus Schaller <hns@xxxxxxxxxxxxx> wrote:
> >>>
> >>> Hi Ezequiel,
> >>
> >> The fix is just re-organizing the code a bit. Just pushed a possible
> >> fix for that (following the IPU handling by Paul Cercueil),
> >> please feel free to test this:
> >>
> >> https://gitlab.collabora.com/linux/0day/-/commits/jz4780-drm-hdmi-module-fix-v5.9-rc2
> >
> > Works well (after doing a minor fix to the CI20 defconfig)!
> >
> >>
> >> FWIW, my test setup uses mainline vanilla U-Boot v2020.07.
> >> The kernel is loaded via TFTP. Debian mipsel is mounted via NFS
> >> (which means dm9000 works). I'm testing with weston and modetest.
> >>
> >> Note that enabling DRM_INGENIC_IPU will make the driver
> >> fail to load, as the IPU is not optional (and not present on ci20.dts).
> >> A minor thing to fix.
> >>
> >> Cheers,
> >> Ezequiel
> >>
> >>> And it seems to differ significantly from what Paul has developed recently
> >>> to make it work. It seems to be quite lucky that we have a working setup now :)
> >>>
> >>>> Nikolaus, Paul: Do you have plans to submit these?
> >>>
> >>> Yes, as soon as we are sure that it works (and when it doesn't).
> >>>
> >>> But thanks to your work it is now much easier to improve things, since we
> >>> are no longer looking for a break-through but just have to avoid regressions.
> >>>
> >>>> If not, I'll be happy to get them out the door for review.
> >>>
> >>> Let it mature a little first and have it tested on more setups and rebased
> >>> to mainline v5.9-rc2 :)
> >
> >
> >> Am 24.08.2020 um 23:11 schrieb Paul Cercueil <paul@xxxxxxxxxxxxxxx>:
> >>
> >> DRM drivers follow their own schedule, you should rebase to drm-misc-next instead.
> >>
> >
> > With the comment from Paul, I think it is best if you push them for review.
> >
> > My patch set based on v5.9-rc2 is here (including one EFUSE patch which I have
> > included only for making my Ethernet interface work for testing):
> >
> > https://git.goldelico.com/?p=letux-kernel.git;a=shortlog;h=refs/heads/letux/jz4780-hdmi-v5
> >
> > Please take it, do the required squashes and rebasing and post them for discussion to the
> > appropriate lists.
>
> I hope you are well. Do you plan to do the squash and rebase and posts?
>

Hi Nikolaus,

I wanted to use the component API for the the dw hdmi glue driver
but somehow it wasn't probing and I haven't had time to debug it. Using the
component API consistently would allow to do some cleanups IMHO.

Thanks,
Ezequiel
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