Commit f9b9b6d9 authored by Josip Pavic's avatar Josip Pavic Committed by Alex Deucher
Browse files

drm/amd/display: fix dcc swath size calculations on dcn1 



[Why]
Swath sizes are being calculated incorrectly. The horizontal swath size
should be the product of block height, viewport width, and bytes per
element, but the calculation uses viewport height instead of width. The
vertical swath size is similarly incorrectly calculated. The effect of
this is that we report the wrong DCC caps.

[How]
Use viewport width in the horizontal swath size calculation and viewport
height in the vertical swath size calculation.

Signed-off-by: default avatarJosip Pavic <Josip.Pavic@amd.com>
Reviewed-by: default avatarAric Cyr <Aric.Cyr@amd.com>
Acked-by: default avatarRodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 3cfe9fb6

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.c

+2 −2
Original line number Diff line number Diff line
@@ -830,8 +830,8 @@ static void hubbub1_det_request_size( 


	hubbub1_get_blk256_size(&blk256_width, &blk256_height, bpe);



	swath_bytes_horz_wc = height * blk256_height * bpe;

	swath_bytes_vert_wc = width * blk256_width * bpe;

	swath_bytes_horz_wc = width * blk256_height * bpe;

	swath_bytes_vert_wc = height * blk256_width * bpe;



	*req128_horz_wc = (2 * swath_bytes_horz_wc <= detile_buf_size) ?

			false : /* full 256B request */