[Bug 90725] Display chunks with xorg intel driver with Accel & when using swap space

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90725

--- Comment #21 from Chris Wilson <chris at chris-wilson.co.uk> ---
Oh, the kernel doesn't like setting swizzle unknown:

 /* If we can't handle the swizzling, make it untiled. */
 if (args->swizzle_mode == I915_BIT_6_SWIZZLE_UNKNOWN) {
      args->tiling_mode = I915_TILING_NONE;
      args->swizzle_mode = I915_BIT_6_SWIZZLE_NONE;
       args->stride = 0;
 }

and of course doesn't flag an error to the user. So it is just a broken API.

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