1*7ce99d24SChris Wilsonconfig DRM_I915_SPIN_REQUEST 2*7ce99d24SChris Wilson int 3*7ce99d24SChris Wilson default 5 # microseconds 4*7ce99d24SChris Wilson help 5*7ce99d24SChris Wilson Before sleeping waiting for a request (GPU operation) to complete, 6*7ce99d24SChris Wilson we may spend some time polling for its completion. As the IRQ may 7*7ce99d24SChris Wilson take a non-negligible time to setup, we do a short spin first to 8*7ce99d24SChris Wilson check if the request will complete in the time it would have taken 9*7ce99d24SChris Wilson us to enable the interrupt. 10*7ce99d24SChris Wilson 11*7ce99d24SChris Wilson May be 0 to disable the initial spin. In practice, we estimate 12*7ce99d24SChris Wilson the cost of enabling the interrupt (if currently disabled) to be 13*7ce99d24SChris Wilson a few microseconds. 14