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drm/amd/display: Adjust downscaling limits for dcn314

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[ Upstream commit dd2db2dc4b ]

[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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Daniel Miess
2023-01-17 15:45:30 -05:00
committed by Greg Kroah-Hartman
parent 0c42622a57
commit 7dbd205349
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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@@ -871,8 +871,9 @@ 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
},
@@ -1755,7 +1756,7 @@ 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;