[Intel-gfx] [PATCH i-g-t] igt/kms_rotation_crc: exercise invalid rotations

[Matthew Auld]

> Y tiled fb will be rejected for gen < 9, should use X/linear for those.

Are you referring to the __gem_set_tiling call? Since this didn't fail
on BDW and I don't see any logic in i915_gem_set_tiling which
implements this.

> Actually using X/linear for gen >= 9 would also be interesting to
make sure we reject 90/270

Yup, good point

> I would suggest looking at the supported rotations for each plane
and picking some invalid ones based on that.

Sorry, I must be missing something, isn't that what it already does?
I've just picked the invalid rotations for the primary, cursor and sprite
planes.