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-rw-r--r--drivers/gpu/drm/i915/Kconfig.profile27
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/Kconfig.profile b/drivers/gpu/drm/i915/Kconfig.profile
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+++ b/drivers/gpu/drm/i915/Kconfig.profile
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+config DRM_I915_USERFAULT_AUTOSUSPEND
+ int "Runtime autosuspend delay for userspace GGTT mmaps (ms)"
+ default 250 # milliseconds
+ help
+ On runtime suspend, as we suspend the device, we have to revoke
+ userspace GGTT mmaps and force userspace to take a pagefault on
+ their next access. The revocation and subsequent recreation of
+ the GGTT mmap can be very slow and so we impose a small hysteris
+ that complements the runtime-pm autosuspend and provides a lower
+ floor on the autosuspend delay.
+
+ May be 0 to disable the extra delay and solely use the device level
+ runtime pm autosuspend delay tunable.
+
+config DRM_I915_SPIN_REQUEST
+ int "Busywait for request completion (us)"
+ default 5 # microseconds
+ help
+ 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.