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linux/drivers/gpu
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Umesh Nerlige Ramappa abcc2ddae5 i915/guc: Reset engine utilization buffer before registration 
On GT reset, we store total busyness counts for all engines and
re-register the utilization buffer with GuC. At that time we should
reset the buffer, so that we don't get spurious busyness counts on
subsequent queries.

To repro this issue, run igt@perf_pmu@busy-hang followed by
igt@perf_pmu@most-busy-idle-check-all for a couple iterations.

Fixes: 77cdd054dd ("drm/i915/pmu: Connect engine busyness stats from GuC to pmu")
Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Reviewed-by: John Harrison <John.C.Harrison@Intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241127174006.190128-2-umesh.nerlige.ramappa@intel.com
(cherry picked from commit abd318237f)
Signed-off-by: Tvrtko Ursulin <tursulin@ursulin.net>
History 2024-12-17 10:15:03 +00:00
..
drm i915/guc: Reset engine utilization buffer before registration 2024-12-17 10:15:03 +00:00
host1x Get rid of 'remove_new' relic from platform driver struct 2024-12-01 15:12:43 -08:00
ipu-v3 Get rid of 'remove_new' relic from platform driver struct 2024-12-01 15:12:43 -08:00
trace gpu/trace: add a gpu total memory usage tracepoint 2020-03-03 17:52:41 -05:00
vga drm: Do delayed switcheroo in drm_lastclose() 2024-08-13 16:21:07 +02:00
Makefile gpu: host1x: Add context bus 2022-06-01 11:50:42 +02:00