[Bug 69248] New: [Baytrail-M] Boot up with "[drm:intel_pipe_config_compare] *ERROR* mismatch in clock" and "Call Trace"

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=69248

          Priority: medium
            Bug ID: 69248
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [Baytrail-M] Boot up with
                    "[drm:intel_pipe_config_compare] *ERROR* mismatch in
                    clock" and "Call Trace"
        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 85687
  --> https://bugs.freedesktop.org/attachment.cgi?id=85687&action=edit
dmesg: boot up with error and call trace

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 call trace and error in dmesg. 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. I append the dmesg here, and if there's something needed, I'm glad
to support you.

Error:
--------------------
[    2.710082] [drm:valleyview_enable_rps] *ERROR* GT fifo had a previous error
10
[    2.771175] [drm:intel_pipe_config_compare] *ERROR* mismatch in clock
(expected 138780, found 0)


Call Trace:
--------------------
[    2.771165] [drm:i9xx_crtc_clock_get], Unknown DPLL mode 00000000 in
programm
ed mode
[    2.771175] [drm:intel_pipe_config_compare] *ERROR* mismatch in clock
(expect
ed 138780, found 0)
[    2.771178] ------------[ cut here ]------------
[    2.771221] WARNING: CPU: 1 PID: 1151 at
drivers/gpu/drm/i915/intel_display.c
:8783 check_crtc_state+0x6d6/0x71d [i915]()
[    2.771222] pipe state doesn't match!
[    2.771229] Modules linked in: i915(+) video button drm_kms_helper drm
acpi_c
pufreq mperf freq_table
[    2.771233] CPU: 1 PID: 1151 Comm: udevd Not tainted
3.11.0-rc7_drm-intel-nex
t-queued_6c4a89_20130911_+ #8370
[    2.771237]  0000000000000000 0000000000000009 ffffffff816ee0bb
ffff88006feb5
2a8
[    2.771240]  ffffffff81032101 ffff88006feb52a0 ffffffffa008a8a5
0000000000000
000
[    2.771242]  ffff8800742a7000 ffff880004d58800 ffff88006feb5328
ffff8800742a7
6d0
[    2.771243] Call Trace:
[    2.771251]  [<ffffffff816ee0bb>] ? dump_stack+0x41/0x51
[    2.771256]  [<ffffffff81032101>] ? warn_slowpath_common+0x73/0x8b
.........
.........

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