[Bug 110628] [gen3] [drm] GPU HANG: ecode 3:1:0x00000000, in Xorg [991], hang on rcs0.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110628

--- Comment #1 from Chris Wilson <chris at chris-wilson.co.uk> ---
IPEHR gives part of the pixel shader program and not the instruction itself --
suggests something went wrong with the parsing. Coherency? Cachelines? Fencing?

The other possibility is the state setup throws off the parser, e.g. a tiled
surface not aligned. It is only using 0x00900000 as the X tiled destination,
and 0x07000000 as the Y tiled source (glyph atlas). So it looks fine, unless
we've missed an 945g peculiarity (and tiling is indeed peculiar).

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