drm/i915: kill resource streamer support
After disabling resource streamer on ICL (due to it actually not existing there), I got feedback that there have been some experimental patches for mesa to use RS years ago, but nothing ever landed or shipped because there was no performance improvement. This removes it from kernel keeping the uapi defines around for compatibility. v2: - re-add the inadvertent removal of CTX_CTRL_INHIBIT_SYN_CTX_SWITCH - don't bother trying to document removed params on uapi header: applications should know that from the query. (from Chris) v3: - disable CTX_CTRL_RS_CTX_ENABLE istead of removing it - reword commit message after Daniele confirmed no performance regression on his machine - reword commit message to make clear RS is being removed due to never been used v4: - move I915_EXEC_RESOURCE_STREAMER to __I915_EXEC_ILLEGAL_FLAGS so the check on ioctl() is made much earlier by i915_gem_check_execbuffer() (suggested by Tvrtko) Signed-off-by: NLucas De Marchi <lucas.demarchi@intel.com> Acked-by: NDaniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Reviewed-by: NTvrtko Ursulin <tvrtko.ursulin@intel.com> Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk> Link: https://patchwork.freedesktop.org/patch/msgid/20180803232443.17193-1-lucas.demarchi@intel.com
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