libtuning: lsc: rkisp1: Clip lsc values to valid range

Based on the input images, the lsc values could exceed the range allowed
by the rkisp1. As we are now clipping the values, we can simplify the
value mapping.

Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>

utils/tuning/libtuning/modules/lsc/rkisp1.py

@@ -80,7 +80,8 @@ class LSCRkISP1(LSC):
             tables = []
             for lis in [list_cr, list_cgr, list_cgb, list_cb]:
                 table = np.mean(lis[indices], axis=0)
-                table = output_map_func((1, 3.999), (1024, 4095), table)
+                table = output_map_func((1, 4), (1024, 4096), table)
+                table = np.clip(table, 1024, 4095)
                 table = np.round(table).astype('int32').tolist()
                 tables.append(table)