[Bug 96226] [IGT] [BXT-P/KBL/SKL] some pm_rpm / kms_flip subtests causes [i915]] *ERROR* CPU pipe B/C FIFO underrun

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96226

--- Comment #17 from Humberto Israel Perez Rodriguez <humberto.i.perez.rodriguez at intel.com> ---
(In reply to cprigent from comment #16)
> Hi Humberto,
> Is the FIFO underrun reproduced?
> Is your result with the patch applied or not (comment 14)?

Hi Christophe :

the mbox from the comment 14 could not be apply it due to the following error : 

(09:10 AM) [gfx at bifrost] [drm-tip]$ : git am Series-without-cover-letter.mbox
Applying: drm/i915: skip the first 4k of stolen memory on everything >= gen8
error: patch failed: drivers/gpu/drm/i915/i915_gem_stolen.c:55
error: drivers/gpu/drm/i915/i915_gem_stolen.c: patch does not apply
Patch failed at 0001 drm/i915: skip the first 4k of stolen memory on everything
>= gen8
The copy of the patch that failed is found in: .git/rebase-apply/patch
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".



with latest configuration the only test that are fail are the following :

Kernel
==================================================
commit af723422378a6d17bd5b632880b195f8443445b5
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Sat Jan 14 16:21:29 2017 +0000

    drm-tip: 2017y-01m-14d-16h-21m-06s UTC integration manifest


Gfx stack
==================================================
Component         : drm
        tag       : libdrm-2.4.74-25-g44f220a
        commit    : 44f220a 

Component         : cairo
        tag       : 1.15.4-4-gdd4706d
        commit    : dd4706d 

Component         : intel-gpu-tools
        tag       : intel-gpu-tools-1.17-115-g12e34d8
        commit    : 12e34d8 



the following test in SKL are fail but there does not causes ([i915]] *ERROR*
CPU pipe B/C FIFO underrun) please see attached logs skl.dmesg ()

Platform : SKL
=================================
igt at pm_rpm@universal-planes
igt at pm_rpm@legacy-planes
igt at kms_flip@2x-plain-flip-ts-check-interruptible
igt at kms_flip@flip-vs-wf_vblank-interruptible
igt at kms_flip@2x-flip-vs-absolute-wf_vblank-interruptible
igt at kms_flip@2x-flip-vs-wf_vblank-interruptible
igt at kms_flip@plain-flip-ts-check-interruptible
igt at kms_flip_tiling@flip-to-y-tiled
igt at kms_flip_tiling@flip-to-yf-tiled

the following test in KBL are fail but and randomly causes ([i915]] *ERROR* CPU
pipe B/C FIFO underrun) please see attached logs kbl.dmesg ()

Platform : KBL
=================================
igt at pm_rpm@universal-planes
igt at pm_rpm@legacy-planes
igt at kms_flip@2x-plain-flip-ts-check-interruptible
igt at kms_flip@flip-vs-wf_vblank-interruptible
igt at kms_flip@2x-flip-vs-absolute-wf_vblank-interruptible
igt at kms_flip@2x-flip-vs-wf_vblank-interruptible
igt at kms_flip@plain-flip-ts-check-interruptible
igt at kms_flip_tiling@flip-to-y-tiled
igt at kms_flip_tiling@flip-to-yf-tiled

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