Enabling PP_OVERDRIVE_MASK with dual monitors causes artifacting

Submitted by bou..@..il.com

Assigned to Default DRI bug account

Link to original bug (#108941)

Description

Steps to reproduce:

1. Have dual monitors
   
2. Enable PP_OVERDRIVE_MASK by flipping the appropriate bit in amdgpu.ppfeaturemask. (For my configuration I used: 0xfffd7fff)
   
3. See artifacting.
   

When using default featuremask, or when using a single monitor with the overdrive bit enabled behaves correctly. I heard multiple people who have the same issue, so it does not seem related to my setup.

Setup:
RX480
Linux 4.20-rc5


If additional information is needed please let me know.