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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Ubuntu12.04.2 LinearFramebuffer under extended mode broken by intel_gen4_compute_offset_xtiled()"
href="https://bugs.freedesktop.org/show_bug.cgi?id=61152#c12">Comment # 12</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Ubuntu12.04.2 LinearFramebuffer under extended mode broken by intel_gen4_compute_offset_xtiled()"
href="https://bugs.freedesktop.org/show_bug.cgi?id=61152">bug 61152</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>(In reply to <a href="show_bug.cgi?id=61152#c10">comment #10</a>)
<span class="quote">> AMD driver render the desktop and blit the content to intel framebuffer.
> However, AMD blit engine could not recognize intel tiling mode, so upon on
> preInit, we force intel driver working under linear frame buffer mode to do
> the right bliting.</span >
You could have staged that transfer through a linear back buffer rather than
force the framebuffer to be linear. Or compute the swizzling in a shader.
With the master/slave pixmap introduced for PRIME, we should be able to create
an interface that is analogous to dma-buf so that we do not have to apply so
many contortions.</pre>
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