[PATCH 0/1][SRU][OEM-5.6]Fix AMD system hang after re-plugin USBC-DP dongle

Aaron Ma aaron.ma at canonical.com
Wed Sep 23 03:58:54 UTC 2020

BugLink: https://bugs.launchpad.net/bugs/1896716

After much times of re-plug USBC-DP dongle with external monitor,
AMD laptop will hang.

AMD GPU driver set the wrong link setting to DP port.
After initialize the DP setting, DP works fine.

[Test Case]
Verified on the target platform. no hang again.

[Regression Potential]
Upstream fix in 5.7 kernel, Verified with positive results.
Groovy already got this fix.

George Shen (1):
  drm/amd/display: Move USB-C workaround to after parameter variables
    are set

 .../gpu/drm/amd/display/dc/core/dc_link_dp.c  | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)


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