[Bug 94722] New: [APL] Init time is high

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94722

            Bug ID: 94722
           Summary: [APL] Init time is high
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: critical
          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 122585
  --> https://bugs.freedesktop.org/attachment.cgi?id=122585&action=edit
kern.log

Hardware
Platform: KABY LAKE-U
CPU : Intel(R) Core(TM) @ 2.60GHz
MCP : KBL-U G0 2+2 (ou ULT-G0)
QDF : QYQ8
Chipset PCH: SPT-LP C1
CRB : KABY LAKE U DDR3L RVP7 CRB FAB1
Software
BIOS : KBLSE2R1.R00.X015.B01.1511271314
ME FW : 11.5.0.1008
Ksc (EC FW): 1.20
Linux distribution: Ubuntu 15.10 64 bits
Kernel drm-intel-nightly 4.5.0-1ab8926 from
http://cgit.freedesktop.org/drm-intel/
  commit 1ab89261aaa1564b3960b15a6d5332795b7a5524
  Author: Daniel Vetter <daniel.vetter at ffwll.ch>
  Date: Mon Mar 21 09:31:07 2016 +0100
drm-intel-nightly: 2016y-03m-21d-08h-30m-17s UTC integration manifest
libdrm-2.4.67-7 49041c3 from git://anongit.freedesktop.org/mesa/drm
cairo 1.15.2 db8a7f1 from git://anongit.freedesktop.org/cairo
intel-gpu-tools-1.14 7fc5256 from
http://anongit.freedesktop.org/git/xorg/app/intel-gpu-tools.git

Steps:
-------
1. Boot
2. Execute command:
dmesg |grep i915_init
3. Suspend to RAM with:
sudo -s
echo mem > /sys/power/state
Wait 30 seconds
Resume with keyboard
4. Execute command:
dmesg |grep "call 0000:00:02.0+ returned 0 after"

Actual result:
-------------
2. Init: 323.47 msecs
4. Suspend:  285.80 msecs
   Resume:  515.81 msecs

Expected result:
----------------
2. Init: 62.5 msecs
4. Suspend and resume: 187.5 msecs

Logs:
-----
Init:
[    1.476225] initcall i915_init+0x0/0x9b [i915] returned 0 after 323475 usecs

Suspend:
[   93.854687] call 0000:00:02.0+ returned 0 after 285803 usecs
[   93.854792] PM: suspend of devices complete after 299.501 msecs

Resume:
[   93.883347] call 0000:00:02.0+ returned 0 after 14456 usecs
[   93.887068] call 0000:00:02.0+ returned 0 after 1 usecs
[   94.115439] call 0000:00:02.0+ returned 0 after 12910 usecs
[   94.145855] call 0000:00:02.0+ returned 0 after 10190 usecs
[   94.708571] call 0000:00:02.0+ returned 0 after 515819 usecs
[   94.712251] PM: resume of devices complete after 531.917 msecs

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