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Warn once if not supported. >> >> Signed-off-by: Riana Tauro >> --- >> drivers/gpu/drm/xe/xe_engine_activity.c | 22 ++++++++++++++++++++++ >> 1 file changed, 22 insertions(+) >> >> diff --git a/drivers/gpu/drm/xe/xe_engine_activity.c b/drivers/gpu/ >> drm/xe/xe_engine_activity.c >> index 7a2ae09d23de..fc34dcf3057a 100644 >> --- a/drivers/gpu/drm/xe/xe_engine_activity.c >> +++ b/drivers/gpu/drm/xe/xe_engine_activity.c >> @@ -236,6 +236,16 @@ static u32 gpm_timestamp_shift(struct xe_gt *gt) >>     return 3 - REG_FIELD_GET(RPM_CONFIG0_CTC_SHIFT_PARAMETER_MASK, reg); >> } >> >> +static bool guc_engine_activity_supported(struct xe_guc *guc) >> +{ >> +    if (GUC_FIRMWARE_VER(guc) >= MAKE_GUC_VER(70, 32, 0)) >> +        return true; >> + >> +    drm_WARN_ON_ONCE(&guc_to_xe(guc)->drm, >> +             "Engine busyness not supported in this GuC version\n"); >> +    return false; >> +} >> + >> /** >>  * xe_engine_activity_get_active_ticks - Get engine active ticks >>  * @hwe: The hw_engine object >> @@ -246,6 +256,9 @@ u64 xe_engine_activity_get_active_ticks(struct >> xe_hw_engine *hwe) >> { >>     struct xe_guc *guc =  &hwe->gt->uc.guc; >> >> +    if (!guc_engine_activity_supported(guc)) >> +        return 0; >> + >>     return get_engine_active_ticks(guc, hwe); >> } >> >> @@ -259,6 +272,9 @@ u64 xe_engine_activity_get_total_ticks(struct >> xe_hw_engine *hwe) >> { >>     struct xe_guc *guc =  &hwe->gt->uc.guc; >> >> +    if (!guc_engine_activity_supported(guc)) > > Hmm, not sure my response to this landed on the ML. Sending again.. > > If GuC is an older version and UMDs have implemented the new interface, > we could return CPU time in ticks here so that UMDs will still be able > to use something in the denominator instead of a divide by zero. Busy > value will still be 0. Thoughts? We could do this. But shouldn't UMD only read total ticks if they see an actual busyness? Busyness % will anyway be 0 even if we return the cpu time in ticks Thanks Riana Tauro > > Umesh > >> +        return 0; >> + >>     return get_engine_total_ticks(guc, hwe); >> }