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  • xcap
  • xcap-capability-linux
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  • xcap-capability-linux
  • drivers
  • gpu
  • drm
  • i915
  • i915_dma.c
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  • Eric Anholt's avatar
    i915: Add support for MSI and interrupt mitigation. · ed4cb414
    Eric Anholt authored Jul 29, 2008
    
    
    Previous attempts at interrupt mitigation had been foiled by i915_wait_irq's
    failure to update the sarea seqno value when the status page indicated that
    the seqno had already been passed.  MSI support has been seen to cut CPU
    costs by up to 40% in some workloads by avoiding other expensive interrupt
    handlers for frequent graphics interrupts.
    
    Signed-off-by: default avatarEric Anholt <eric@anholt.net>
    Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
    ed4cb414