[Bug 91121] New: [BYT-T] i915 init time is high when booting (Asus T100)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91121

            Bug ID: 91121
           Summary: [BYT-T] i915 init time is high when booting (Asus
                    T100)
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: christophe.prigent at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 116746
  --> https://bugs.freedesktop.org/attachment.cgi?id=116746&action=edit
byt-t_tag19june_i915-init-time-high_dmesg

Hardware
Platform: Bay Trail T / T100TA
CPU: Atom Z3740 CPU core i5 (family 6, model 55, stepping 3)
Software
Linux distribution: Ubuntu 14.04 64 bits
BIOS: T100TA.313
Kernel 4.1-rc8 from git://anongit.freedesktop.org/drm-intel tag
drm-intel-testing-2015-06-19
Mesa: mesa-10.5.8 from http://cgit.freedesktop.org/mesa/mesa/
Xf86_video_intel: 2.99.917 from
http://cgit.freedesktop.org/xorg/driver/xf86-video-intel/
Libdrm: libdrm-2.4.61 from http://cgit.freedesktop.org/mesa/drm/
Cairo: 1.14.2 from http://cgit.freedesktop.org/cairo
libva: libva-1.6.0.pre1 from http://cgit.freedesktop.org/libva/
intel-driver: 1.6.0.pre1 from http://cgit.freedesktop.org/vaapi/intel-driver
xorg: 1.17.99 installed with script git_xorg.sh
Xserver: xorg-server-1.17.2 from http://cgit.freedesktop.org/xorg/xserver

Pre-conditions:
---------------
Use kernel boot command line: initcall_debug

Steps:
------
1. Power on DUT
2. Execute command:
dmesg |grep i915_init

Actual result:
--------------
2. Init time is between 1,5 and 1,6 seconds

Expected result:
----------------
2. Value is not so high (we use criteria 50 ms)

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