kernel/linux
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ synced 2026-11-10 20:48:12 +00:00
Code Issues Releases Packages Activity

drm/amd/display: Refactor Per-DPM Derate Logic

Browse source 
[Why/How]
1. DPMM also needs to consider the per-DPM derate when calculating the
clocks
that will be used by mode programming.
Otherwise DPMM calculations can result in rounding up to the next DPM
anyways.

clk index value used by mode support is not reliable when trying to
determine the actual
per-dpm derate.

2. Also update how per-dpm derates are stored so each derate applies until
an upper bound.
Upperbound of 0 signifies this derate is used for the remaining DPMs.

To simplify logic, all derates for all clocks should have the same number
of entries
and the last entry should have an upperbound of 0.

3. Deprecate system_active_average derates from the derate table and move
them to the per-DPM structure
The remaining derates (urgent, dcn_mall, system idle) are unchanged

Reviewed-by: Dillon Varone <dillon.varone@amd.com>
Signed-off-by: Austin Zheng <Austin.Zheng@amd.com>
Signed-off-by: James Lin <pinglei.lin@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Austin Zheng 2026-07-24 17:01:48 -04:00 • committed by Alex Deucher
commit fb481611d0
7 changed files with 181 additions and 64 deletions
Download patch file Download diff file Expand all files Collapse all files