From 60d177fdf8843602e1eb9dfb4900a0d260d32c1b Mon Sep 17 00:00:00 2001 From: Nikola Cornij Date: Thu, 6 May 2021 22:46:52 -0400 Subject: drm/amd/display: Use the correct max downscaling value for DCN3.x family [why] As per spec, DCN3.x can do 6:1 downscaling and DCN2.x can do 4:1. The max downscaling limit value for DCN2.x is 250, which means it's calculated as 1000 / 4 = 250. For DCN3.x this then gives 1000 / 6 = 167. [how] Set maximum downscaling limit to 167 for DCN3.x Signed-off-by: Nikola Cornij Reviewed-by: Charlene Liu Reviewed-by: Harry Wentland Acked-by: Stylon Wang Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c') diff --git a/drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c b/drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c index fc2dea243d1b..a33f0365329b 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c @@ -284,10 +284,11 @@ static const struct dc_plane_cap plane_cap = { .nv12 = 16000, .fp16 = 16000 }, + /* 6:1 downscaling ratio: 1000/6 = 166.666 */ .max_downscale_factor = { - .argb8888 = 600, - .nv12 = 600, - .fp16 = 600 + .argb8888 = 167, + .nv12 = 167, + .fp16 = 167 }, 16, 16 -- cgit