Hi,
I noticed that there is still this patch in the letux gta04 kernel sources but it did
not appear in mainline:
Author: Tomi Valkeinen <tomi.valkeinen@xxxxxx>
Date: Tue Jun 13 12:02:08 2017 +0300
drm/omap: work-around for omap3 display enable
Seems that on omap3 enabling a crtc without any planes causes a sync
lost flood. This only happens on the first enable, and after that it
works. This looks like an HW issue.
It's unclear why this is happening or how to fix it, but as a quick
work-around, this patch enables i734 errata work-around for omap2 and
omap3 too. The errata work-around enables and disables the LCD output
with a plane once when waking up the DSS IP, and it seems to resolve the
omap3 problem too. It is unclear if omap2 has the same issue, but it
probably has and the WA should have no side effects so it should be safe
to enable on omap2 too.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@xxxxxx>
A reordering of initialisation caused a regression I reported and as a result
this patch was created. So what is the fate of that patch? Is it superseded by
something better?
Regards,
Andreas
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