Michel Thierry 53292cdb06 drm/i915: Workaround to avoid lite restore with HEAD==TAIL ... WaIdleLiteRestore is an execlists-only workaround, and requires the driver to ensure that any context always has HEAD!=TAIL when attempting lite restore. Add two extra MI_NOOP instructions at the end of each request, but keep the requests tail pointing before the MI_NOOPs. We may not need to executed them, and this is why request->tail is sampled before adding these extra instructions. If we submit a context to the ELSP which has previously been submitted, move the tail pointer past the MI_NOOPs. This ensures HEAD!=TAIL. v2: Move overallocation to gen8_emit_request, and added note about sampling request->tail in commit message (Chris). v3: Remove redundant request->tail assignment in __i915_add_request, in lrc mode this is already set in execlists_context_queue. Do not add wa implementation details inside gem (Chris). v4: Apply the wa whenever the req has been resubmitted and update comment (Chris). Cc: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Thomas Daniel <thomas.daniel@intel.com> Signed-off-by: Michel Thierry <michel.thierry@intel.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com>		2015-04-23 23:56:52 +03:00
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drm	drm/i915: Workaround to avoid lite restore with HEAD==TAIL	2015-04-23 23:56:52 +03:00
host1x	gpu: host1x: Provide a proper struct bus_type	2015-01-27 10:09:14 +01:00
ipu-v3	gpu: ipu-v3: do not divide by zero if the pixel clock is too large	2015-02-23 17:18:59 +01:00
vga
Makefile	gpu: host1x: Provide a proper struct bus_type	2015-01-27 10:09:14 +01:00