+ unsigned int width, height;
+ unsigned int base_width, base_height;
+ unsigned int col_n, row_n;
+ enum stk1160_decimate_mode col_mode, row_mode;
+ bool col_en, row_en;
+
+ base_width = 720;
+ base_height = (dev->norm & V4L2_STD_525_60) ? 480 : 576;
+
+ /* Minimum width and height is 5% the frame size */
+ width = clamp_t(unsigned int, f->fmt.pix.width,
+ base_width / 20, base_width);
+ height = clamp_t(unsigned int, f->fmt.pix.height,
+ base_height / 20, base_height);
+
+ /* Let's set default no decimation values */
+ col_n = 0;
+ row_n = 0;
+ col_en = false;
+ row_en = false;
+ f->fmt.pix.width = base_width;
+ f->fmt.pix.height = base_height;
+ row_mode = STK1160_DECIMATE_LESS_THAN_HALF;
+ col_mode = STK1160_DECIMATE_LESS_THAN_HALF;
+
+ if (width < base_width && width > base_width / 2) {
+ /*
+ * The device will send count units for each
+ * unit skipped. This means count unit is:
+ *
+ * n = width / (frame width - width)
+ *
+ * And the width is:
+ *
+ * width = (n / n + 1) * frame width
+ */
+ col_n = div_round_integer(width, base_width - width);
+ if (col_n > 0 && col_n <= 255) {
+ col_en = true;
+ col_mode = STK1160_DECIMATE_LESS_THAN_HALF;
+ f->fmt.pix.width = (base_width * col_n) / (col_n + 1);
+ }