[Bug 88911] [ILK]igt/drv_suspend/sysfs-reader cause dmesg warn.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=88911

--- Comment #1 from Ding Heng <hengx.ding at intel.com> ---
f9b3927afbb97649f5c89f0815820167b7c5cba8 is the first bad commit.
commit f9b3927afbb97649f5c89f0815820167b7c5cba8
Author:     Mika Kuoppala <mika.kuoppala at linux.intel.com>
AuthorDate: Wed Jan 28 14:43:24 2015 +0200
Commit:     Daniel Vetter <daniel.vetter at ffwll.ch>
CommitDate: Fri Jan 30 17:15:31 2015 +0100

    drm/i915: Do uncore early sanitize after domain init

    intel_uncore_early_sanitize() will reset the forcewake registers. When
    forcewake domains were introduced, the domain init was done after the
    sanitization of the forcewake registers. And as the resetting of
    registers use the domain accessors, we tried to reset the forcewake
    registers with unitialized forcewake domains and failed.

    Fix this by sanitizing after all the domains have been initialized. Do
    per domain clearing of forcewake register on domain init so that
    IVB can do early access to ECOBUS do determine the final configuration.

    This regression was introduced in

    commit 05a2fb157e44a53c79133805d30eaada43911941
    Author: Mika Kuoppala <mika.kuoppala at linux.intel.com>
    Date:   Mon Jan 19 16:20:43 2015 +0200

        drm/i915: Consolidate forcewake code

    v2: Carve out ellc detect, fw_domain_reset for ivb/ecobus (Chris)

    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=88805
    Cc: Chris Wilson <chris at chris-wilson.co.uk>
    Reported-by: Olof Johansson <olof at lixom.net>
    Tested-by: Darren Hart <dvhart at linux.intel.com> (v1)
    Signed-off-by: Mika Kuoppala <mika.kuoppala at intel.com>
    Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
    Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are on the CC list for the bug.
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20150202/bd2bad5f/attachment.html>