From 6107497eee9f0f9de6f2aa8708db20842637d472 Mon Sep 17 00:00:00 2001 From: Arun Siluvery Date: Thu, 21 Jan 2016 21:43:52 +0000 Subject: [PATCH] drm/i915/skl: Add GEN8_L3SQCREG4 to HW whitelist Required for WaDisableLSQCROPERFforOCL:skl This register is added to HW whitelist to support WA required for future enabling of pre-emptive command execution, WA implementation will be in userspace and it cannot program this register if it is not on HW whitelist. v2: explain purpose of changes (Chris) Reviewed-by: Nick Hoath Signed-off-by: Arun Siluvery Link: http://patchwork.freedesktop.org/patch/msgid/1453412634-29238-7-git-send-email-arun.siluvery@linux.intel.com Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_ringbuffer.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c index 12eb1e0f786b..262a7ea9e9c4 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -1098,6 +1098,11 @@ static int skl_init_workarounds(struct intel_engine_cs *ring) GEN7_HALF_SLICE_CHICKEN1, GEN7_SBE_SS_CACHE_DISPATCH_PORT_SHARING_DISABLE); + /* WaDisableLSQCROPERFforOCL:skl */ + ret = wa_ring_whitelist_reg(ring, GEN8_L3SQCREG4); + if (ret) + return ret; + return skl_tune_iz_hashing(ring); } -- 2.20.1