[Bug 74102] [ILK/SNB/IVB]igt/testdisplay causes *ERROR* Pipe A FIFO underrun

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=74102

maria guadalupe <maria.g.perez.ibarra at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      i915 platform|BDW, HSW                    |
            Summary|[ILK/SNB/IVB/HSW/BDW]igt/te |[ILK/SNB/IVB]igt/testdispla
                   |stdisplay causes  *ERROR*   |y causes  *ERROR* Pipe A
                   |Pipe A FIFO underrun        |FIFO underrun
             Status|NEEDINFO                    |ASSIGNED

--- Comment #25 from maria guadalupe <maria.g.perez.ibarra at intel.com> ---
 This test is passing in HSW and BDW platforms, the i915's error on the demesg
with this configuration doesn't happen : 

|=== Software information ===|

 ++ Kernel version                      :
4.6.0-rc6-drm-intel-nightly-ww19-commit-e6160ef+
 ++ Linux distribution                  : Ubuntu 15.10
 ++ Architecture                        : 64-bit
 ++ xf86-video-intel version            : 2.99.917
 ++ Xorg-Xserver version                : 1.18.99.1
 ++ DRM version                         : 2.4.67
 ++ VAAPI version                       : Intel i965 driver for Intel(R)
Haswell Mobile - 1.7.1.pre1 (1.7.0-8-g2c1bec0)
 ++ Cairo version                       : 1.15.2
 ++ Intel GPU Tools version             : Tag
[intel-gpu-tools-1.14-212-g1e9a3ac] / Commit [1e9a3ac]
 ++ Kernel driver in use                : i915
 ++ Bios revision                       : 4.6

 |=== Hardware information ===|

 ++ Platform                            : HSW-U
 ++ Motherboard type                    : D54250WYK Desktop
 ++ CPU family                          : Core i5
 ++ CPU information                     : Intel(R) Core(TM) i5-4250U CPU @
1.30GHz
 ++ GPU Card                            : Intel Corporation Haswell-ULT
Integrated Graphics Controller (rev 09) (prog-if 00 [VGA controller])

Kernel information
===============================================
commit 9f25629d23907ad525380535b2bbd488ba52b261
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Thu May 5 09:16:21 2016 +0200

    drm-intel-nightly: 2016y-05m-05d-07h-15m-54s UTC integration manifest


Kernel version : 4.6.0-rc6
Architecture : source amd64 all
Homepage : http://www.kernel.org/



test output
=============================
$./testdisplay
CRTC(26):[28]  640x480 75 640 656 720 840 480 481 484 500 0xa 0x40 31500
CRTC(26):[29]  640x480 60 640 656 752 800 480 490 492 525 0xa 0x40 25200
CRTC(26):[30]  640x480 60 640 656 752 800 480 490 492 525 0xa 0x40 25175
CRTC(26):[31]  720x400 70 720 738 846 900 400 412 414 449 0x6 0x40 28320
CRTC(26):[0]  1920x1200 60 1920 1968 2000 2080 1200 1203 1209 1235 0x9 0x48
154000
CRTC(26):[1]  1920x1080 60 1920 2008 2052 2200 1080 1084 1089 1125 0xa 0x40
148500
CRTC(26):[2]  1600x1200 60 1600 1664 1856 2160 1200 1201 1204 1250 0x5 0x40
162000
CRTC(26):[3]  1680x1050 60 1680 1784 1960 2240 1050 1053 1059 1089 0x6 0x40
146250
CRTC(26):[4]  1600x900 60 1600 1624 1704 1800 900 901 904 1000 0x5 0x40 108000
CRTC(26):[5]  1280x1024 60 1280 1328 1440 1688 1024 1025 1028 1066 0x5 0x40
108000
CRTC(26):[6]  1440x900 60 1440 1520 1672 1904 900 903 909 934 0x6 0x40 106500
CRTC(26):[7]  1280x800 60 1280 1352 1480 1680 800 803 809 831 0x6 0x40 83500
CRTC(26):[8]  1280x720 60 1280 1390 1430 1650 720 725 730 750 0x5 0x40 74250
CRTC(26):[9]  1024x768 60 1024 1048 1184 1344 768 771 777 806 0xa 0x40 65000
CRTC(26):[10]  800x600 60 800 840 968 1056 600 601 605 628 0x5 0x40 40000
CRTC(26):[11]  640x480 60 640 656 752 800 480 490 492 525 0xa 0x40 25175
SUCCESS (-1.000s)

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