[Bug 97390] New: [Braswell] HDMI output not working on Insyde laptop board

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97390

            Bug ID: 97390
           Summary: [Braswell] HDMI output not working on Insyde laptop
                    board
           Product: DRI
           Version: DRI git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: anisse at astier.eu
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 125868
  --> https://bugs.freedesktop.org/attachment.cgi?id=125868&action=edit
Patch to see the HDMI output

It seems the eDP1 and HDMI1 output are both on PORT B. If I force-enable HDMI
on port B (see patch attached), I'm able to see the EDID/modes of the connected
screen, but not enable the output.

I tested this on Linus' tree and drm-intel-next-queued. I'm attaching boot logs
with drm.debug=0xe for dinq, with the patch.

I tested this hardware on windows, HDMI output works with the latest Intel
driver.

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