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drm/amd/display: Adjust downscaling limits for dcn314

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[Why]
Lower max_downscale_ratio and ARGB888 downscale factor
to prevent cases where underflow may occur on dcn314

[How]
Set max_downscale_ratio to 400 and ARGB downscale factor
to 250 for dcn314

Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Daniel Miess <Daniel.Miess@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Daniel Miess 2023-01-17 15:45:30 -05:00 committed by Alex Deucher
parent ea062fd28f
commit dd2db2dc4b
1 changed files with 3 additions and 2 deletions
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5
drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c
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@ -874,8 +874,9 @@ static const struct dc_plane_cap plane_cap = {
},
// 6:1 downscaling ratio: 1000/6 = 166.666
// 4:1 downscaling ratio for ARGB888 to prevent underflow during P010 playback: 1000/4 = 250
.max_downscale_factor = {
.argb8888 = 167,
.argb8888 = 250,
.nv12 = 167,
.fp16 = 167
},
@ -1763,7 +1764,7 @@ static bool dcn314_resource_construct(
pool->base.underlay_pipe_index = NO_UNDERLAY_PIPE;
pool->base.pipe_count = pool->base.res_cap->num_timing_generator;
pool->base.mpcc_count = pool->base.res_cap->num_timing_generator;
dc->caps.max_downscale_ratio = 600;
dc->caps.max_downscale_ratio = 400;
dc->caps.i2c_speed_in_khz = 100;
dc->caps.i2c_speed_in_khz_hdcp = 100;
dc->caps.max_cursor_size = 256;