From: Tim Gore <tim.gore@xxxxxxxxx> This allows writes to EU flow control registers. Together with SIP code from the user-mode driver this resolves a hang seen in some pre-emption scenarios. Note that this patch is just the kernel mode part of this workaround. Signed-off-by: Tim Gore <tim.gore@xxxxxxxxx> --- drivers/gpu/drm/i915/intel_ringbuffer.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c index 45ce45a..83ab25a 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -920,8 +920,10 @@ static int gen9_init_workarounds(struct intel_engine_cs *ring) I915_WRITE(GAM_ECOCHK, I915_READ(GAM_ECOCHK) | ECOCHK_DIS_TLB); + /* WaClearFlowControlGpgpuContextSave:skl,bxt */ /* WaDisablePartialInstShootdown:skl,bxt */ WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN, + FLOW_CONTROL_ENABLE | PARTIAL_INSTRUCTION_SHOOTDOWN_DISABLE); /* Syncing dependencies between camera and graphics:skl,bxt */ -- 1.9.1 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
