drm/amd/display: Check scaling ration not viewports params.

In case of roation, width and height in viewport is difference
between viewport and h_active and v_active, while this is not scaling.
The right way is check ratios in scaling data,
to determine it is a scaling case or not.

Signed-off-by: Yongqiang Sun <yongqiang.sun@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_dpp.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_dpp.c
index c69fa4b..742fd49 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_dpp.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_dpp.c
@@ -145,10 +145,10 @@ static bool dpp_get_optimal_number_of_taps(
                pixel_width = scl_data->viewport.width;
 
        /* Some ASICs does not support  FP16 scaling, so we reject modes require this*/
-       if (scl_data->viewport.width  != scl_data->h_active &&
-               scl_data->viewport.height != scl_data->v_active &&
+       if (scl_data->format == PIXEL_FORMAT_FP16 &&
                dpp->caps->dscl_data_proc_format == DSCL_DATA_PRCESSING_FIXED_FORMAT &&
-               scl_data->format == PIXEL_FORMAT_FP16)
+               scl_data->ratios.horz.value != dc_fixpt_one.value &&
+               scl_data->ratios.vert.value != dc_fixpt_one.value)
                return false;
 
        if (scl_data->viewport.width > scl_data->h_active &&