[Bug 93384] New: [SKL] DDX fails to do hardware assisted 90/270 rotation

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93384

            Bug ID: 93384
           Summary: [SKL] DDX fails to do hardware assisted 90/270
                    rotation
           Product: xorg
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/intel
          Assignee: chris at chris-wilson.co.uk
          Reporter: tvrtko.ursulin at linux.intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org

Created attachment 120521
  --> https://bugs.freedesktop.org/attachment.cgi?id=120521&action=edit
Default DDX build

Neither DDX default build, or when built to default to Y tiled scanout, manage
to do the hardware 90/270 rotation. Instead it falls back to software rotation
and X tiled fb.

Allegedly kernel rejects the setcrtc call DDX makes so perhaps the DDX is not
respecting some of the kernel rules on how this should be used.

I got some old Xorg log for both build flavours showing this which I'll attach.

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