[Bug 89074] [SKL mobile]HDMI sporadically fails to be lighted up , plug in after os boot up.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89074

--- Comment #4 from liulei <lei.a.liu at intel.com> ---
This issue still exists on latest -nightly.
running i-g-t testdisplay  shows:
root at x-skly03:/opt# ./testdisplay -i
Connectors:
id      encoder status          type    size (mm)       modes
34      33      connected       eDP     290x170         2
  modes:
  name refresh (Hz) hdisp hss hse htot vdisp vss vse vtot flags type clock
[0]  3200x1800 60 3200 3248 3280 3316 1800 1802 1807 1816 0xa 0x48 361310
[1]  3200x1800 48 3200 3248 3280 3680 1800 1802 1807 2045 0xa 0x40 361310
43      0       disconnected    DP      0x0             0
47      42      disconnected    HDMI-A  510x290         0
50      0       disconnected    DP      0x0             0
54      0       disconnected    HDMI-A  0x0             0

CRTCs:
id      fb      pos     size
20      57      (0,0)   (3200x1800)
  3200x1800 60 3200 3248 3280 3316 1800 1802 1807 1816 0xa 0x48 361310
25      57      (0,0)   (1920x1080)
  1920x1080 60 1920 2008 2052 2200 1080 1084 1089 1125 0x5 0x48 148500
30      0       (0,0)   (0x0)
   0 0 0 0 0 0 0 0 0 0x0 0x0 0

The monitor still stays black screen.

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