With MTL onwards, creating protected contexts too early
may block for a longer period. To prevent that, use the new
kernel GET_PARAM:I915_PARAM_PXP_STATUS interface to get the
status of PXP support immediately without blocking.
Using this same interface, we can also wait for platform
dependency readiness before attempting to create a protected
context. Use a longer timeout when user explicitly requests
for protected context as the kernel assures readiness will be
achieved.
Reference to kernel change: https://patchwork.freedesktop.org/patch/533241/?series=112647&rev=8
Signed-off-by: Alan Previn <alan.previn.teres.alexis@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23382>
Alan Previn
e358173fbf