[PATCH 0/1][SRU][N] Navi24 RX6300 light up issue on 6.8 kernel

[AceLan Kao]

From: "Chia-Lin Kao (AceLan)" <acelan.kao at canonical.com>

BugLink: https://bugs.launchpad.net/bugs/2084513

[Impact]
Navi24 (specific customer SKU of RX6300) had problems with lighting up
display on 6.8 kernel.

[Fix]
Mario at AMD looked at issue and it is caused by this commit in 6.8-rc1:

e57cd73f971194e94bc42d57b9fcb184c93a8754 drm/amd/display: Optimize fast validation cases

It has been fixed by this commit in 6.9-rc1:

f0ec30549a2b ("drm/amd/display: Ensure populate uclk in bb construction")

[Test]
Boot up the machine with AMD RX6300 gfx, it should display well.

[Where problems could occur]
The patch modifies how optimal DCFCLK (display controller fabric clock)
and UCLK (memory clock) values are calculated and paired. This could
potentially lead to suboptimal clock settings in some scenarios, especially
for low bandwidth cases. The comment mentions this is specifically needed
for DCN303 due to low memory bandwidth, but it may have unintended
consequences for other configurations.

Alvin Lee (1):
  drm/amd/display: Ensure populate uclk in bb construction

 .../display/dc/dml/dcn30/display_mode_vba_30.c   | 16 ++++++++--------
 .../drm/amd/display/dc/dml/dcn303/dcn303_fpu.c   | 11 +++++++++++
 .../display/dc/resource/dcn30/dcn30_resource.c   | 11 +++++++++++
 3 files changed, 30 insertions(+), 8 deletions(-)

-- 
2.43.0