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

[Vlad Zahorodnii]

zzag added a comment.


  I've just had a quick look at i915 source code. Apparently, it requires Y/Yf tiling in order for rotate-90 and rotate-270 to work, which means we need to add support for buffer modifiers. However, this also means that the drm backend does bad job at state management (TEST_ONLY commit should have failed).
  
  Anyway, if no one wants to put any work into fixing this issue prior to 5.17 release, feel free to merge this patch. Although I recommend to disable output rotation altogether until we have proper fix.

REPOSITORY
  R108 KWin

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

To: romangg, #kwin
Cc: 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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