[Bug 100356] New: [DSI] Panel detection fail

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=100356

            Bug ID: 100356
           Summary: [DSI] Panel detection fail
           Product: DRI
           Version: DRI git
          Hardware: x86-64 (AMD64)
                OS: All
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: b7086163 at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 130397
  --> https://bugs.freedesktop.org/attachment.cgi?id=130397&action=edit
4.11 r3 drm-tip WITH Dirty Hack

No screen image on display. Just black with backlight. Fastboot=1 doesn't
working. Get fastboot to work by dirty hack:
[
In intel_display.c, I changed the line


FROM

if (i915.fastboot && intel_pipe_config_compare(dev,
to_intel_crtc_state(crtc->state), pipe_config, true)) {

TO

if (i915.fastboot) {
]
Now display is working with fastboot=1, but XRANDR detects it as a UNKNOWN. If
try to change display orientation, I will get black screen with backlight. 

If I use kernel without dirty hack, it detects DSI panel normally, but it's
black.

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