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/openbmc/linux/drivers/gpu/drm/i915/ |
H A D | i915_irq.c | diff 097354eb14fa94d31a09c64d640643f58e4a5a9a Sun Nov 27 11:58:17 CST 2011 Daniel Vetter <daniel.vetter@ffwll.ch> drm/i915: check ACTHD of all rings
Otherwise hangcheck spuriously fires when running blitter/bsd-only workloads.
Contrary to a similar patch by Ben Widawsky this does not check INSTDONE of the other rings. Chris Wilson implied that in a failure to detect a hang, most likely because INSTDONE was fluctuating. Thus only check ACTHD, which as far as I know is rather reliable. Also, blitter and bsd rings can't launch complex tasks from a single instruction (like 3D_PRIM on the render with complex or even infinite shaders).
This fixes spurious gpu hang detection when running tests/gem_hangcheck_forcewake on snb/ivb.
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Keith Packard <keithp@keithp.com>
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H A D | i915_drv.h | diff 097354eb14fa94d31a09c64d640643f58e4a5a9a Sun Nov 27 11:58:17 CST 2011 Daniel Vetter <daniel.vetter@ffwll.ch> drm/i915: check ACTHD of all rings
Otherwise hangcheck spuriously fires when running blitter/bsd-only workloads.
Contrary to a similar patch by Ben Widawsky this does not check INSTDONE of the other rings. Chris Wilson implied that in a failure to detect a hang, most likely because INSTDONE was fluctuating. Thus only check ACTHD, which as far as I know is rather reliable. Also, blitter and bsd rings can't launch complex tasks from a single instruction (like 3D_PRIM on the render with complex or even infinite shaders).
This fixes spurious gpu hang detection when running tests/gem_hangcheck_forcewake on snb/ivb.
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Keith Packard <keithp@keithp.com>
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