From e029de381abb71f24eaa05e7b7b974a1bb98886e Mon Sep 17 00:00:00 2001 From: jsg Date: Thu, 11 Apr 2024 03:35:18 +0000 Subject: [PATCH] drm/i915/gt: Do not generate the command streamer for all the CCS From Andi Shyti 726ff623869ddc3de887d99296cac3c849061b21 in linux-6.6.y/6.6.26 ea315f98e5d6d3191b74beb0c3e5fc16081d517c in mainline linux --- sys/dev/pci/drm/i915/gt/intel_engine_cs.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/sys/dev/pci/drm/i915/gt/intel_engine_cs.c b/sys/dev/pci/drm/i915/gt/intel_engine_cs.c index 8dab7b76fc6..32506b6b2ab 100644 --- a/sys/dev/pci/drm/i915/gt/intel_engine_cs.c +++ b/sys/dev/pci/drm/i915/gt/intel_engine_cs.c @@ -916,6 +916,23 @@ 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)) { + u8 first_ccs = __ffs(CCS_MASK(gt)); + + /* Mask off all the CCS engine */ + info->engine_mask &= ~GENMASK(CCS3, CCS0); + /* Put back in the first CCS engine */ + info->engine_mask |= BIT(_CCS(first_ccs)); + } + return info->engine_mask; } -- 2.20.1