From b97089b88c7f8359a772cc2a31e0a87d9441243a Mon Sep 17 00:00:00 2001 From: George Shen Date: Wed, 14 Jun 2023 17:53:16 -0400 Subject: [PATCH] drm/amd/display: Update 128b/132b downspread factor to 0.3% [Why] Updating downspread factor to 0.3% to add additional margin to account for potential link rate deviations (up to 300ppm as per the DP spec). Reviewed-by: Wenjing Liu Acked-by: Alan Liu Signed-off-by: George Shen Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/include/link_service_types.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/include/link_service_types.h b/drivers/gpu/drm/amd/display/include/link_service_types.h index cd870af5fd250..1b8ab20f17152 100644 --- a/drivers/gpu/drm/amd/display/include/link_service_types.h +++ b/drivers/gpu/drm/amd/display/include/link_service_types.h @@ -53,7 +53,7 @@ enum { BITS_PER_DP_BYTE = 10, DATA_EFFICIENCY_8b_10b_x10000 = 8000, /* 80% data efficiency */ DATA_EFFICIENCY_8b_10b_FEC_EFFICIENCY_x100 = 97, /* 97% data efficiency when FEC is enabled */ - DATA_EFFICIENCY_128b_132b_x10000 = 9646, /* 96.71% data efficiency x 99.75% downspread factor */ + DATA_EFFICIENCY_128b_132b_x10000 = 9641, /* 96.71% data efficiency x 99.7% downspread factor */ }; enum lttpr_mode { -- 2.30.2