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: Josip Pavic <Josip.Pavic@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.c
index f36a0d8cedfe1eec4b8db2766ca401991200ad41..446ba0a7a4b3d641474733fe2989b4d4c1a26226 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.c
@@ -840,8 +840,8 @@ 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 */