The recommended number of stackIDs for Ray Tracing subsystem is 512 rather than 2048 (default HW programming). v2: Move the programming to dg2_ctx_gt_tuning_init() (Lucas) Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@xxxxxxxxx> --- drivers/gpu/drm/i915/gt/intel_gt_regs.h | 4 ++++ drivers/gpu/drm/i915/gt/intel_workarounds.c | 5 +++++ 2 files changed, 9 insertions(+) diff --git a/drivers/gpu/drm/i915/gt/intel_gt_regs.h b/drivers/gpu/drm/i915/gt/intel_gt_regs.h index 07ef111947b8c..12fc87b957425 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt_regs.h +++ b/drivers/gpu/drm/i915/gt/intel_gt_regs.h @@ -1112,6 +1112,10 @@ #define GEN12_PUSH_CONST_DEREF_HOLD_DIS REG_BIT(8) #define RT_CTRL _MMIO(0xe530) +#define RT_CTRL_NUMBER_OF_STACKIDS_MASK REG_GENMASK(6, 5) +#define NUMBER_OF_STACKIDS_512 2 +#define NUMBER_OF_STACKIDS_1024 1 +#define NUMBER_OF_STACKIDS_2048 0 #define DIS_NULL_QUERY REG_BIT(10) #define EU_PERF_CNTL1 _MMIO(0xe558) diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c index 3213c593a55f4..4d80716b957d4 100644 --- a/drivers/gpu/drm/i915/gt/intel_workarounds.c +++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c @@ -575,6 +575,11 @@ static void dg2_ctx_gt_tuning_init(struct intel_engine_cs *engine, FF_MODE2_TDS_TIMER_MASK, FF_MODE2_TDS_TIMER_128, 0, false); + wa_write_clr_set(wal, + RT_CTRL, + RT_CTRL_NUMBER_OF_STACKIDS_MASK, + REG_FIELD_PREP(RT_CTRL_NUMBER_OF_STACKIDS_MASK, + NUMBER_OF_STACKIDS_512)); } /* -- 2.34.1
