drm/amd/display: change when to set tap_hardcode_coeff

Set hardcode_coeff only when BOTH chroma and luma taps are
more than 1

without this underscan with h or v set to 0 darkens
the screen (either h or v set to 0, not both)
Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@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>

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_dpp_dscl.c

@@ -306,10 +306,10 @@ static void dpp_set_scl_filter(
 
 	h_2tap_hardcode_coef_en = scl_data->taps.h_taps < 3
 					&& scl_data->taps.h_taps_c < 3
-		&& (scl_data->taps.h_taps > 1 || scl_data->taps.h_taps_c > 1);
+		&& (scl_data->taps.h_taps > 1 && scl_data->taps.h_taps_c > 1);
 	v_2tap_hardcode_coef_en = scl_data->taps.v_taps < 3
 					&& scl_data->taps.v_taps_c < 3
-		&& (scl_data->taps.v_taps > 1 || scl_data->taps.v_taps_c > 1);
+		&& (scl_data->taps.v_taps > 1 && scl_data->taps.v_taps_c > 1);
 
 	h_2tap_sharp_en = h_2tap_hardcode_coef_en && h_2tap_sharp_factor != 0;
 	v_2tap_sharp_en = v_2tap_hardcode_coef_en && v_2tap_sharp_factor != 0;