[Bug 103509] drm/i915 GPU Hang in Artful Advark 17.10

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103509

--- Comment #9 from Elizabeth <elizabethx.de.la.torre.mena at intel.com> ---
(In reply to Luka Paunovic from comment #8)
> @Elizabeth this is a severe issue. Is there going to be a fix for this?
Good afternoon Luka, 
Please retest with tip branch https://cgit.freedesktop.org/drm-tip, here are
the latest commits that are being developed, particulary
https://bugs.freedesktop.org/show_bug.cgi?id=103502#c3

commit 1d033beb20d6d5885587a02a393b6598d766a382
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Tue Oct 31 10:36:07 2017 +0000

    drm/i915: Check incoming alignment for unfenced buffers (on i915gm) 

May help with

Active (rcs0) [59]:
00000000_020ef000  8294400 7e 00 [ 1d404 00 00 00 00 ] 00 X dirty uncached
(fence: 7)
00000000_00c4d000   524288 7e 00 [ 1d405 00 00 00 00 ] 00 X dirty uncached
(fence: 8)
00000000_00fe6000   327680 7e 00 [ 1d405 00 00 00 00 ] 00 X dirty uncached
(fence: 12)

and

commit  e5330ac1f50b897d245753828e8887f297f69dd0 (Patch)
author  Chris Wilson <chris at chris-wilson.co.uk> 2017-10-31 12:22:35 (GMT)
committer       Chris Wilson <chris at chris-wilson.co.uk> 2017-11-01 13:43:14
(GMT)

drm/i915: Check that the breadcrumb wasn't disarmed automatically before
parking

with 

[drm:missed_breadcrumb [i915]] rcs0 missed breadcrumb at
intel_breadcrumbs_hangcheck+0x60/0x80 [i915], irq posted? yes, current
seqno=185cf, last=185d3

Also from error state, this is the latest instruction before gpu hang:
0x00070c98:      0x54f08806: XY_SRC_COPY_BLT (rgb enabled, alpha enabled, src
tile 1, dst tile 1)
0x00070c9c:      0x03cc1400:    format 8888, pitch 5120, rop 0xcc, clipping
disabled,  
0x00070ca0:      0x00000044:    dst (68,0)
0x00070ca4:      0x00010045:    dst (69,1)
0x00070ca8:      0x1da93000:    dst offset 0x1da93000
0x00070cac:      0x00000000:    src (0,0)
0x00070cb0:      0x00000080:    src pitch 128
0x00070cb4:      0x0001c000:    src offset 0x0001c000

BR, Elizabeth.

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