drm/i915: Restrict GPU boost to the RCS engine

Make the assumption that media workloads are not as latency sensitive
for __wait_seqno, and that upclocking the GPU does not affect the BLT
engine. Under that assumption, we only wait to forcibly upclock the GPU
when we are stalling for results from the render pipeline.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Deepak S<deepak.s@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index e85c85c0333e387c0f3dc9b13a0056b598421625..b6225730cdcdb556e7b1ef18307c1f0764414d7e 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1168,7 +1168,7 @@ static int __wait_seqno(struct intel_engine_cs *ring, u32 seqno,
 
        timeout_expire = timeout ? jiffies + timespec_to_jiffies_timeout(timeout) : 0;
 
-       if (INTEL_INFO(dev)->gen >= 6 && can_wait_boost(file_priv)) {
+       if (INTEL_INFO(dev)->gen >= 6 && ring->id == RCS && can_wait_boost(file_priv)) {
                gen6_rps_boost(dev_priv);
                if (file_priv)
                        mod_delayed_work(dev_priv->wq,