drm/amd/display: disable adaptive scaler and sharpener when integer scaling is enabled

[Why & How]
When integer scaling is enabled, set taps to 1 and disable adaptive
scaler and sharpener.

Reviewed-by: Jun Lei <[e-mail]>
Signed-off-by: Samson Tam <[e-mail]>
Signed-off-by: Aurabindo Pillai <[e-mail]>
Tested-by: Daniel Wheeler <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

drivers/gpu/drm/amd/display/dc/dc_spl_translate.c

···
 	spl_scaling_quality->h_taps = scaling_quality->h_taps;
 	spl_scaling_quality->v_taps_c = scaling_quality->v_taps_c;
 	spl_scaling_quality->v_taps = scaling_quality->v_taps;
+	spl_scaling_quality->integer_scaling = scaling_quality->integer_scaling;
 }
 static void populate_taps_from_spltaps(struct scaling_taps *scaling_quality,
 		const struct spl_taps *spl_scaling_quality)

drivers/gpu/drm/amd/display/dc/spl/dc_spl.c

···
 		spl_scratch->scl_data.viewport.width > max_downscale_src_width)
 		return false;
 
+	/* Disable adaptive scaler and sharpener when integer scaling is enabled */
+	if (spl_in->scaling_quality.integer_scaling) {
+		spl_scratch->scl_data.taps.h_taps = 1;
+		spl_scratch->scl_data.taps.v_taps = 1;
+		spl_scratch->scl_data.taps.v_taps_c = 1;
+		spl_scratch->scl_data.taps.h_taps_c = 1;
+		*enable_easf_v = false;
+		*enable_easf_h = false;
+		*enable_isharp = false;
+		return true;
+	}
+
 	/* Check if we are using EASF or not */
 	skip_easf = enable_easf(spl_in, spl_scratch);