drm/amd/display: Add Back Unified CalculateFlipSchedule

[Why]
CalculateFlipSchedule has slightly different calculations depending on
if it was called by mode support or mode programming.

Mode support calculates the lower bound of the required bandwidth for
immediate flips. This takes into the account of the register limits to
ensure it is still programmable.

Mode programming uses the required bandwidth for immediate flips on a
per-plane basis to calculate the number of dst_y lines needed to achieve
this bandwidth.

Usually the immediate flip bandwidth per plane determined by mode
programming is above the lower bound calculated by mode support.
However, mode programming can fail if that isn't the case since a
bandwidth lower than the lower bound will end up exceeding the register
limit used by hardware. e.g. The proportion of a single plane's flip
bandwidth w.r.t to the total bandwidth available for all planes can
result in one of the planes having a lower BW than the lower bound
calculated in mode support

[How]
Update function to always use the use_lb_flip_bw path. Add calculations
for dst_y_per_vm/row_flip lines. Consolidate calculation of lb_flip_bw
by having it consider register limits: Instead of doing two steps of: 1.
Taking the max of the bandwidths without considering register limits. 2.
Taking the max of itself with the bandwidths with register limits
accounted for. Do it in one step as it is easy to miss either step 1 or
2.

Also add some local variables for intermediate values and remove no
longer referenced inputs to improve readability.

Also increase DCN401 max_flip_time_lines by 2 lines to ensure previously
supported configs remain supported as worst-case bandwidth can increase
compared to before.

Fixes: 1e719006b623 ("drm/amd/display: Unify CalculateFlipSchedule Logic")
Fixes: 285a363f8c63 ("Revert "drm/amd/display: Unify CalculateFlipSchedule Logic"")
Reviewed-by: Dillon Varone <dillon.varone@amd.com>
Reviewed-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Austin Zheng <Austin.Zheng@amd.com>
Signed-off-by: George Zhang <george.zhang@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

0 files changed, 0 insertions, 0 deletions