[Bug 80382] New: [BYT Regression]DP monitor was recognized as eDP

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=80382

          Priority: high
            Bug ID: 80382
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [BYT Regression]DP monitor was recognized as eDP
        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: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 101559
  --> https://bugs.freedesktop.org/attachment.cgi?id=101559&action=edit
dmesg

==System Environment==
--------------------------
Regression: Yes. 
I unable to find good commit

Non-working platforms: BYT

==kernel==
--------------------------
origin/drm-intel-nightly: 78f31a2d50183db12c0532eadcf486b9ebfa5f6d(fails)
    drm-intel-nightly: 2014y-06m-19d-21h-00m-17s integration manifest
origin/drm-intel-next-queued: 9c33baa6b3bbb01c1a88dceba986b20e6642cf31(fails)
    drivers/i915: Fix unnoticed failure of init_ring_common()    
origin/drm-intel-fixes: 4a11e398b39b018c7aa3b22267cfdf3b7fae3625(fails)
    drm/i915: cache hw power well enabled state

==Bug detailed description==
-----------------------------
Boot the device with DP monitor, the DP monitor was recognized as eDP. If boot
the device then plug DP monitor, DP unable to be detected. 

Output:
[root at x-byt05 tests]# ./testdisplay -i
Connectors:
id      encoder status          type    size (mm)       modes
25      24      connected       eDP     510x290         11
  modes:
  name refresh (Hz) hdisp hss hse htot vdisp vss vse vtot flags type clock
[0]  1920x1080 60 1920 2008 2052 2200 1080 1084 1089 1125 0x5 0x48 148500
[1]  1280x1024 75 1280 1296 1440 1688 1024 1025 1028 1066 0x5 0x40 135000
[2]  1280x1024 60 1280 1328 1440 1688 1024 1025 1028 1066 0x5 0x40 108000
[3]  1152x864 75 1152 1216 1344 1600 864 865 868 900 0x5 0x40 108000
[4]  1024x768 75 1024 1040 1136 1312 768 769 772 800 0x5 0x40 78800
[5]  1024x768 60 1024 1048 1184 1344 768 771 777 806 0xa 0x40 65000
[6]  800x600 75 800 816 896 1056 600 601 604 625 0x5 0x40 49500
[7]  800x600 60 800 840 968 1056 600 601 605 628 0x5 0x40 40000
[8]  640x480 75 640 656 720 840 480 481 484 500 0xa 0x40 31500
[9]  640x480 60 640 656 752 800 480 490 492 525 0xa 0x40 25200
[10]  720x400 70 720 738 846 900 400 412 414 449 0x6 0x40 28320
14      15      connected       VGA     0x0             5
  modes:
  name refresh (Hz) hdisp hss hse htot vdisp vss vse vtot flags type clock
[0]  1024x768 60 1024 1048 1184 1344 768 771 777 806 0xa 0x40 65000
[1]  800x600 60 800 840 968 1056 600 601 605 628 0x5 0x40 40000
[2]  800x600 56 800 824 896 1024 600 601 603 625 0x5 0x40 36000
[3]  848x480 60 848 864 976 1088 480 486 494 517 0x5 0x40 33750
[4]  640x480 60 640 656 752 800 480 489 492 525 0xa 0x40 25175
17      0       disconnected    HDMI-A  520x290         0
21      0       disconnected    DP      0x0             0
23      0       disconnected    HDMI-A  0x0             0

CRTCs:
id      fb      pos     size
6       48      (0,0)   (1920x1080)
  1920x1080 60 1920 2008 2052 2200 1080 1084 1089 1125 0x5 0x48 148500
11      48      (0,0)   (1024x768)
  1024x768 60 1024 1048 1184 1344 768 771 777 806 0xa 0x40 65000


==Reproduce steps==
---------------------------- 
1.  Boot the device with DP monitor
2.  ./testdisplay -i

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