[Bug 107663] New: APL: FIFO underrun observed when a 4k external monitor is connected through usb type-c to HDMI adapter

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107663

            Bug ID: 107663
           Summary: APL: FIFO underrun observed when a 4k external monitor
                    is connected through usb type-c to HDMI adapter
           Product: DRI
           Version: DRI git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: raviraj.p.sitaram at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 141247
  --> https://bugs.freedesktop.org/attachment.cgi?id=141247&action=edit
drm log

1. Boot APL device. 
2. Connect a 4k external monitor to the APL device through usb typeC to HDMI 
   adapter

Expected: No underrun errors to be observed

Observed: Underrun is observed during hotplug.

Attached is the captured drm log.

adapter used for the testing can be found from url:
https://store.google.com/product/usb_type_c_to_hdmi_adapter

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