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drm/amd/display: treat memory as a single-channel for asymmetric memory

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[Why]
1. Driver use umachannelnumber to calculate watermarks for stutter.
In asymmetric memory config, the actual bandwidth is less than
dual-channel. The bandwidth should be the same as single-channel.
2. We found single rank dimm need additional delay time for stutter.

[How]
Get information from each DIMM. Treat memory config as a single-channel
for asymmetric memory in bandwidth calculating. Add additional delay
time for single rank dimm.

Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Hugo Hu <hugo.hu@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Hugo Hu
2021-01-20 15:54:11 +08:00
committed by Alex Deucher
parent c839292754
commit dbc43d5fdf
2 changed files with 48 additions and 2 deletions
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2
drivers/gpu/drm/amd/display/dc/dc.h
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@@ -307,6 +307,8 @@ struct dc_config {
#endif
uint64_t vblank_alignment_dto_params;
uint8_t vblank_alignment_max_frame_time_diff;
bool is_asymmetric_memory;
bool is_single_rank_dimm;
};
enum visual_confirm {