We want a fixed load CCS balancing consisting in all slices sharing one single user engine. For this reason do not create the intel_engine_cs structure with its dedicated command streamer for CCS slices beyond the first.
Fixes: d2eae8e98d59 ("drm/i915/dg2: Drop force_probe requirement") Signed-off-by: Andi Shyti andi.shyti@linux.intel.com Cc: Chris Wilson chris.p.wilson@linux.intel.com Cc: Joonas Lahtinen joonas.lahtinen@linux.intel.com Cc: Matt Roper matthew.d.roper@intel.com Cc: stable@vger.kernel.org # v6.2+ Acked-by: Michal Mrozek michal.mrozek@intel.com --- drivers/gpu/drm/i915/gt/intel_engine_cs.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+)
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c index f553cf4e6449..47c4a69e854c 100644 --- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c +++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c @@ -908,6 +908,21 @@ static intel_engine_mask_t init_engine_mask(struct intel_gt *gt) info->engine_mask &= ~BIT(GSC0); }
+ /* + * Do not create the command streamer for CCS slices beyond the first. + * All the workload submitted to the first engine will be shared among + * all the slices. + * + * Once the user will be allowed to customize the CCS mode, then this + * check needs to be removed. + */ + if (IS_DG2(gt->i915)) { + intel_engine_mask_t first_ccs = BIT((CCS0 + __ffs(CCS_MASK(gt)))); + intel_engine_mask_t all_ccs = CCS_MASK(gt) << CCS0; + + info->engine_mask &= ~(all_ccs &= ~first_ccs); + } + return info->engine_mask; }