[PATCH v2 0/3][jammy] Fix AMD Yellow Carp B0 s0i3

[You-Sheng Yang]

From: "You-Sheng Yang (vicamo)" <vicamo.yang at canonical.com>

BugLink: https://bugs.launchpad.net/bugs/1957026

[Impact]

On AMD Yellow Carp B0 platforms, S0i3 is still not working.

[Fix]

This denpends on a few fixes for kernel driver that are all either in
v5.17-rc1 or in stable linux-5.1x.y, along with an already upstreamed
dmcub firmware.

[Test Case]

On AMD RMT CRB board,
1. apply both kernel and firmware fixes
2. module blacklist amd_sfh as it's still under development,
3. trigger system suspend. Use power button to wake up the device.
4. check /sys/kernel/debug/amd_pmc/s0ix_stats, the values shall be
   non-zero

On without any of above, the board may not cut device power during
suspend, and/or fail to resume and leaving a blank screen, and/or
s0ix stats remain all zeros.

[Where problems could occur]

So far all the patches can be cleanly applied, and they're being
progressively proposed to linux-stable.

[Other Info]

For kernel driver fixes, patches for both oem-5.14 and jammy are
necessary; for firmware, that has been available in jammy branch
but not yet released, so only Focal will be nominated.

V2: no change resubmit since the last part in the previous revision has
been included through stable fixes.


Nicholas Kazlauskas (3):
  drm/amd/display: Optimize bandwidth on following fast update
  drm/amd/display: Fix surface optimization regression on Carrizo
  drm/amd/display: Reset DMCUB before HW init

 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c |  5 ++++
 drivers/gpu/drm/amd/display/dc/core/dc.c      | 24 +++++++++++++------
 2 files changed, 22 insertions(+), 7 deletions(-)

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2.36.1