Hi Krzysztof, On Tue, Jul 21, 2026 at 09:16:15AM +0000, Krzysztof Karas wrote: > When a context is saved and then restored, the timer delta is > calculated using signed 32 bit arithmetic on hardware written > value to PPHWSP/LRC image and previously stored value, which use > unsigned types. This difference may become negative for version > 12, due to hardware quirk on these platforms. This in turn, > would cause -EOVERFLOW to be thrown inside live_pphwsp_runtime > test.
do we have any details on this hardware quirk? Thanks, Andi > Similar case has been observed [1] and addressed [2] already, > so follow suit and disable the test here as well. > > [1] https://gitlab.freedesktop.org/drm/i915/kernel/-/work_items/13697 > [2] "73782fc64793 (i915/gt/selftests: Disable lrc_timestamp test)" > > Closes: https://gitlab.freedesktop.org/drm/i915/kernel/-/work_items/16521 > Signed-off-by: Krzysztof Karas <[email protected]>
