[Why]
Read modify write hazards can occur when using a single shared scratch
register between driver and firmware leading to driver accessing DCN
in IPS2 and a system hang.
[How]
Add infrastructure for using REGION6 as a shared firmware state between
driver and firmware. This region is uncachable.
Replace the existing get/set idle calls with reads/writes to the
(volatile) shared firmware state blocks that a separated by at least
a cache line between firmware and driver.
Remove the workarounds that required rewriting/checking read modify
write hazards.
Reviewed-by: Charlene Liu <charlene.liu@amd.com>
Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
[WHY]
Ability to triage DMCUB is improved with availability of certain
dmub registers not currently captured in crash dump diagnostic data.
[HOW]
Add dmub registers to diagnostic data collection.
Thanks Nicholas Kazlauskas for awesome input on this!
Signed-off-by: Ashley Thomas <Ashley.Thomas2@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Anson Jacob <Anson.Jacob@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
[Why]
The conditions for whether we used cached vs non-cached inbox1 depend
on a version check that mismatches what the shared helpers in dmub20
implement.
[How]
Use the dmub_dcn20_use_cached_inbox check for dmub_dcn30 as well.
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Acked-by: Anson Jacob <Anson.Jacob@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
[Why]
To support inbox1 in CW4 we need to actually program CW4 instead of
region 4 for newer firmware.
This is done correctly on DCN20/DCN21 but this code wasn't added to
DCN30.
[How]
Copy over the missing code. It doesn't need address translation since
DCN30 uses virtual addressing.
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
