[Bug 211807] New: [drm:drm_dp_mst_dpcd_read] *ERROR* mstb 000000004e6288dd port 3: DPCD read on addr 0x60 for 1 bytes NAKed

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=211807

            Bug ID: 211807
           Summary: [drm:drm_dp_mst_dpcd_read] *ERROR* mstb
                    000000004e6288dd port 3: DPCD read on addr 0x60 for 1
                    bytes NAKed
           Product: Drivers
           Version: 2.5
    Kernel Version: 5.10.16
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: low
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri at kernel-bugs.osdl.org
          Reporter: kernelbugs at equaeghe.nospammail.net
        Regression: No

In my logs, I see the following error:


[drm:drm_dp_mst_dpcd_read] *ERROR* mstb 000000004e6288dd port 3: DPCD read on
addr 0x60 for 1 bytes NAKed


It has not caused any detected issues, but I guess that if the kernel complains
this loudy, it is good to report it.

This is on a laptop with a Ryzen Pro 4750U APU. I custom-build the kernel, so
do not hesitate to request changing some config options to investigate.

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