[Bug 74962] New: [BYT Regression]Unable to work on two pipes(DP and HDMI)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=74962

          Priority: medium
            Bug ID: 74962
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [BYT Regression]Unable to work on two pipes(DP and
                    HDMI)
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: jinxianx.guo at intel.com
          Hardware: Other
            Status: NEW
           Version: XOrg CVS
         Component: DRM/Intel
           Product: DRI

Created attachment 94041
  --> https://bugs.freedesktop.org/attachment.cgi?id=94041&action=edit
dmesg

Environment:
--------------------------
Platform: BayTrail
Kernel: (drm-intel-nightly) 64fcdb139972db2663469d8799968260fb43a26d


Bug detailed description:
-----------------------------
The device unable to work on two pipes mode. DP and HDMI unable to work at the
same time.

It works well on -testing(54b927ca040f2adee35f9ee95c9ce40d6be2f0e8)

Steps:
---------------------------
1. Boot OS only with DP
2. Hot-plug HDMI cable, the monitor will show "HDMI NO SIGNAL"
3. If unplug DP, HDMI works normally
4. Reboot OS only with HDMI
5. Hot-plug DP cable, the monitor will show "DP NO SIGNAL"
6. If unplug HDMI, DP workd normally

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