Comme=
nt # 87
on bug 11067=
4
from Tom =
B
> Could be we've got a race condition=
between the powerplay setup and amdgpu
handing off the card to drm_dev_register to advertise it for normal use.
The question then becomes: Why doesn't the race condition happen with only =
one
screen? Perhaps it's a matter of speed. With a single display, the driver
detect the displays, read/parse the EDID data, initialize in time. But then
that doesn't explain why the crash still occurs if you boot with one
DisplayPort monitor and attach another after X is running.
One thing I've been trying to work out is the difference between vega21_ppt=
.c
and vega20_hwmgr.c is, as they both contain slightly different or identic=
al
versions of the same functions. It looks like the functions in vega20_hwmgr=
.c=20
take precedence but it's strange to see this duplication and both files are
worked on in the commit history.
Take a look at vega20_set_uclk_to_highest_dpm_level and
vega20_apply_clocks_adjust_rules in both for examples.