1. 10 Mar, 2012 37 commits
  2. 07 Mar, 2012 1 commit
  3. 05 Mar, 2012 1 commit
  4. 29 Feb, 2012 1 commit
    • Felix Kuehling's avatar
      drm/radeon: fix deferred page-flip detection logic on Avivo-based ASICs · 81ffbbed
      Felix Kuehling authored
      This fixes page-flip-related flickering observed on Iconia Tab W500.
      
      The update_pending status returned by radeon_page_flip is very accurate on
      Avivo-based ASICs when vpos is negative.
      
      Experiments were conducted on several ASIC generations ranging from RS690
      to Cayman where the page flip was artificially timed to occur at a specific
      vpos. With negative vpos, overriding update_pending always lead to
      flickering.
      
      The same experiment on RV380 and RV410 showed that update_pending is not
      accurate with negative vpos. In most cases update_pending == 1 is returned
      although the flip would complete before the start of the next frame.
      Therefore I left the behaviour unchanged for pre-AVIVO ASICs for
      performance reasons, although this may result in flickering in rare cases.
      
      This change also makes the logic a little easier to understand.
      Signed-off-by: default avatarFelix Kuehling <Felix.Kuehling@amd.com>
      Reviewed-by: default avatarMario Kleiner <mario.kleiner@tuebingen.mpg.de>
      Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
      81ffbbed