Le lun. 24 août 2020 à 14:38, Ezequiel Garcia
<ezequiel@xxxxxxxxxxxxxxxxxxxx> a écrit :
On Mon, 24 Aug 2020 at 13:05, H. Nikolaus Schaller
<hns@xxxxxxxxxxxxx> wrote:
Hi Ezequiel,
> Am 24.08.2020 um 15:46 schrieb Ezequiel Garcia
<ezequiel@xxxxxxxxxxxxxxxxxxxx>:
>
> On Fri, 21 Aug 2020 at 19:24, Paul Cercueil
<paul@xxxxxxxxxxxxxxx> wrote:
>>
>>
>>
>> Le sam. 22 août 2020 à 0:11, Paul Boddie <paul@xxxxxxxxxxxxx> a
>> écrit :
>>
>> If you send clean patches, there's no reason for me not to merge
them.
>>
>
> I'd really like to see HDMI support on my CI20 being merged.
Thank to
> recent ingenic-drm work and thanks for Paul Boddie and Nikolaus
work,
> the patches are IMO quite clean.
I have done some testing and it appears that it only works if DRM is
compiled into the kernel. At least in my setup. If DRM and/or HDMI
are made
modules there is no video or code doesn't compile completely.
We have to analyse that further.
Ah! That's true.
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
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.
Actually that's a bug, the IPU should be optional. I'll come up with a
fix.
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 :)
DRM drivers follow their own schedule, you should rebase to
drm-misc-next instead.
Cheers,
-Paul
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