default or selected kernelversion does not have config value CONFIG_DRM_I915_SPIN_REQUEST.
Result is shown for kernelversion 6.8.2

Busywait for request completion (us)


Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>drm/i915 Profile Guided Optimisation
└─>Busywait for request completion (us)
In linux kernel since version 5.3 (release Date: 2019-09-15)  
Before sleeping waiting for a request (GPU operation) to complete,
we may spend some time polling for its completion. As the IRQ may
take a non-negligible time to setup, we do a short spin first to
check if the request will complete in the time it would have taken
us to enable the interrupt.

May be 0 to disable the initial spin. In practice, we estimate
the cost of enabling the interrupt (if currently disabled) to be
a few microseconds.