[Bug 75077] New: [IVB] Apple miniDP-to-DP can be detected but can't light up

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=75077

          Priority: medium
            Bug ID: 75077
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [IVB] Apple miniDP-to-DP can be detected but can't
                    light up
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: qingshuai.tian at intel.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 94184
  --> https://bugs.freedesktop.org/attachment.cgi?id=94184&action=edit
dmesg after run case "testdisplay -i "&"testdisplay -a"

Environment:
-------------------
  Kernel: (drm-intel-next-queued) 4c0e552882114d1edb588242d45035246ab078a0
  Hardware name: Apple Inc. MacBookPro10,2/Mac-AFD8A9D944EA4843, 
  BIOS MBP102.88Z.0106.B03.1211161133 11/16/2012

Description:
------------------------
When Apple boot up with eDP and miniDP-to-DP connected, the eDP monitor can be
lighted up correctly, while the DP monitor was black without any output. 

But when I run case "testdisplay -i", it shows:
 Connectors:
 id      encoder status          type    size (mm)       modes
 12      11      connected       eDP     290x180         1
   modes:
   name refresh (Hz) hdisp hss hse htot vdisp vss vse vtot flags type clock
 [0]  2560x1600 60 2560 2608 2640 2720 1600 1603 1609 1646 0x9 0x48 268500
 9       0       disconnected    VGA     0x0             0
 20      0       disconnected    HDMI-A  0x0             0
 22      0       disconnected    DP      0x0             0
 24      0       disconnected    HDMI-A  0x0             0
 26      0       disconnected    HDMI-A  0x0             0
 28      0       connected       DP      470x300         11
   modes:
   name refresh (Hz) hdisp hss hse htot vdisp vss vse vtot flags type clock
 [0]  1680x1050 60 1680 1728 1760 1840 1050 1053 1059 1080 0x9 0x48 119000
 [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
 30      0       disconnected    DP      0x0             0

And when I run case "testdisplay -a", the DP monitor can show all modes
correctly.
After I start X, the eDP can show the X window correctly , but the DP can't
either. 

Test Step:
--------------------
1. connect miniDP-to-DP 
2. Boot up 
3. testdisplay -i 
4. testdisplay -a

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