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CONFIG_DRM_I915_USERFAULT_AUTOSUSPEND: Runtime autosuspend delay for userspace GGTT mmaps (ms)

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The Linux kernel configuration item CONFIG_DRM_I915_USERFAULT_AUTOSUSPEND:

Help text

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.



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