Comment 0 for bug 1964850

Observed choppy issue for touchpad on HP Lockheed with OEM-1025 kernel, and can't smoothly drag USB mouse if connected.
Rolled back to OEM-1023 kernel and observed the same issues.
Can't reproduce the issue with OEM-1022 kernel.

Bisect identified the problematic commits below,
          021e2c1f6143 drm/amdgpu/display: set vblank_disable_immediate for DC
          1a4dd5a679da drm/amd/display: check top_pipe_to_program pointer

Reverting above 2 commits on the top of oem-5.14-5.14.0-1025.27, touchpad or USB mouse back to normal working behavior on HP Lockheed and we don't see choppy trackpad/mouse issue.

$ git log --oneline -5
62e596025e1e (HEAD -> fm_oem-5.14-next) Revert "drm/amd/display: check top_pipe_to_program pointer"
82cab088605f Revert "drm/amdgpu/display: set vblank_disable_immediate for DC"
165041ee003c (tag: Ubuntu-oem-5.14-5.14.0-1025.27, origin/oem-5.14-next) UBUNTU: Ubuntu-oem-5.14-5.14.0-1025.27
8bdd3e2ea820 UBUNTU: [Config] Update config to match upstream stable release
43f3b8b56abe UBUNTU: debian/dkms-versions -- update from kernel-versions (main/2022.02.21)