[Bug 69396] New: [Baytrail-M] [drm:valleyview_enable_rps] *ERROR* GT fifo had a previous error 10

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=69396

          Priority: medium
            Bug ID: 69396
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [Baytrail-M] [drm:valleyview_enable_rps] *ERROR* GT
                    fifo had a previous error 10
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: major
    Classification: Unclassified
                OS: All
          Reporter: yangweix.shui at intel.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 85886
  --> https://bugs.freedesktop.org/attachment.cgi?id=85886&action=edit
dmesg: boot up with "*ERROR* GT fifo"

Environment:
--------------------
Kernel: (drm-intel-next-queued)6c4a8962a4a078cacfc8eb5d4bd79f6343b8cd7a
Author: Jesse Barnes <jbarnes at virtuousgeek.org>
Date:   Tue Sep 10 14:54:42 2013 -0700
    drm/i915/vlv: re-enable hotplug detect based probing on VLV/BYT


lspci:
--------------------
00:02.0 VGA compatible controller: Intel Corporation ValleyView Gen7 (rev 0a)


Description:
--------------------
Test with latest -next-queued kernel, there's "*ERROR* GT fifo" in dmesg when
machine boot up. I tested other IVB platform, there's not this issue. Older
kernels also reproduceable. We are testing Baytrail machine recently, and it
might not be a regression. 

Error:
--------------------
[    2.710082] [drm:valleyview_enable_rps] *ERROR* GT fifo had a previous error
10

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