The patch below does not apply to the 5.2-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable@xxxxxxxxxxxxxxx>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From cf8f9aa1eda7d916bd23f6b8c226404deb11690c Mon Sep 17 00:00:00 2001 From: Lionel Landwerlin <lionel.g.landwerlin@xxxxxxxxx> Date: Fri, 28 Jun 2019 15:07:20 +0300 Subject: [PATCH] drm/i915/icl: whitelist PS_(DEPTH|INVOCATION)_COUNT The same tests failing on CFL+ platforms are also failing on ICL. Documentation doesn't list the WaAllowPMDepthAndInvocationCountAccessFromUMD workaround for ICL but applying it fixes the same tests as CFL. v2: Use only one whitelist entry (Lionel) Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@xxxxxxxxx> Tested-by: Anuj Phogat <anuj.phogat@xxxxxxxxx> Cc: stable@xxxxxxxxxxxxxxx # 6883eab27481: drm/i915: Support flags in whitlist WAs Cc: stable@xxxxxxxxxxxxxxx Acked-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> Link: https://patchwork.freedesktop.org/patch/msgid/20190628120720.21682-4-lionel.g.landwerlin@xxxxxxxxx (cherry picked from commit 3fe0107e45ab396342497e06b8924cdd485cde3b) Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx> diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c index b26c3549429e..98dfb086320f 100644 --- a/drivers/gpu/drm/i915/gt/intel_workarounds.c +++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c @@ -1144,6 +1144,19 @@ static void icl_whitelist_build(struct intel_engine_cs *engine) /* WaEnableStateCacheRedirectToCS:icl */ whitelist_reg(w, GEN9_SLICE_COMMON_ECO_CHICKEN1); + + /* + * WaAllowPMDepthAndInvocationCountAccessFromUMD:icl + * + * This covers 4 register which are next to one another : + * - PS_INVOCATION_COUNT + * - PS_INVOCATION_COUNT_UDW + * - PS_DEPTH_COUNT + * - PS_DEPTH_COUNT_UDW + */ + whitelist_reg_ext(w, PS_INVOCATION_COUNT, + RING_FORCE_TO_NONPRIV_RD | + RING_FORCE_TO_NONPRIV_RANGE_4); break; case VIDEO_DECODE_CLASS:
