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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Display chunks with xorg intel driver with Accel & when using swap space"
href="https://bugs.freedesktop.org/show_bug.cgi?id=90725#c22">Comment # 22</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Display chunks with xorg intel driver with Accel & when using swap space"
href="https://bugs.freedesktop.org/show_bug.cgi?id=90725">bug 90725</a>
from <span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span></b>
<pre>So, setting swizzle unknown is not a good test. Probably, something like
diff --git a/drivers/gpu/drm/i915/i915_gem_tiling.c
b/drivers/gpu/drm/i915/i915_gem_tiling.c
index af23a5a7b870..a192a9e83aa8 100644
--- a/drivers/gpu/drm/i915/i915_gem_tiling.c
+++ b/drivers/gpu/drm/i915/i915_gem_tiling.c
@@ -214,13 +214,10 @@ i915_gem_detect_bit_6_swizzle(struct drm_device *dev)
* the table above, or from the 1-ch value being less than
* the minimum size of a rank.
*/
- if (I915_READ16(C0DRB3) != I915_READ16(C1DRB3)) {
- swizzle_x = I915_BIT_6_SWIZZLE_NONE;
- swizzle_y = I915_BIT_6_SWIZZLE_NONE;
- } else {
- swizzle_x = I915_BIT_6_SWIZZLE_9_10;
- swizzle_y = I915_BIT_6_SWIZZLE_9;
- }
+ swizzle_x = I915_BIT_6_SWIZZLE_9_10;
+ swizzle_y = I915_BIT_6_SWIZZLE_9;
+ if (I915_READ16(C0DRB3) != I915_READ16(C1DRB3))
+ dev_priv->quirks |= QUIRK_PIN_SWIZZLED_PAGES;
}
dev_priv->mm.bit_6_swizzle_x = swizzle_x;
is better for testing.</pre>
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