D24112: [platforms/drm] Disable setting 90° transformations

[Bhushan Shah]

bshah added a comment.


  > However, this also means that the drm backend does bad job at state management (TEST_ONLY commit should have failed).
  
  I was testing this on slightly different device then i915, and based on quick debugging, it seems TEST_ONLY commit is failing correctly all the time but when trying to reset the lastState it goes into infinite loop.
  
  I did more investigation and for some reason last state is set to incorrect mode, which starts recursion.. I am yet to figure out why this happens, is it DRM lying to us or something I am not quite sure. If I can't figure this out by this week, let's merge this I guess.

REPOSITORY
  R108 KWin

REVISION DETAIL
  https://phabricator.kde.org/D24112

To: romangg, #kwin
Cc: bshah, zzag, apol, kwin, LeGast00n, The-Feren-OS-Dev, sbergeron, jraleigh, fbampaloukas, GB_2, mkulinski, ragreen, jackyalcine, iodelay, crozbo, bwowk, ZrenBot, ngraham, alexeymin, himcesjf, lesliezhai, ali-mohamed, hardening, romangg, jensreuterberg, abetts, sebas, mart
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