[Bug 91926] [SKL bisected] texsubimage pbo intermittent failures

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91926

--- Comment #79 from Topi Pohjolainen <topi.pohjolainen at intel.com> ---
(In reply to Topi Pohjolainen from comment #78)
> (In reply to Topi Pohjolainen from comment #76)
> > It is not certain if it is the tex-update-blit itself that is failing.
> > Running the same test without -fbo option works. And that option doesn't
> > affect the blit in question in anyway.
> > 
> > Also adding a glClear() (against the main fbo) just after the tex-blit makes
> > the
> > error go a way just as in IVB case.
> 
> Dumping the contents of the blit just after it unfortunately makes the error
> go away as well (intel_miptree_map()/unmap() pair seems to help).

But dumping the contents after cache flush (just after brw_emit_mi_flush()) in
brw_render_cache_set_check_flush() gives me the original value and not the one
written by the blit. This cache flush is preceding the final blit from the
texture to fbo.

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