gpu: ipu-v3: turns out the IPU can only downsize 4:1

The value for downsizing 8:1 is marked as reserved in the technical reference
manual and the documentation states downsizing capability up to 4:1 only.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

parent f7089d92

drivers/gpu/ipu-v3/ipu-ic.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -297,8 +297,8 @@ static int calc_resize_coeffs(struct ipu_ic *ic,
		return -EINVAL;
		}

		/* Cannot downsize more than 8:1 */
		if ((out_size << 3) < in_size) {
		/* Cannot downsize more than 4:1 */
		if ((out_size << 2) < in_size) {
		dev_err(ipu->dev, "Unsupported downsize\n");
		return -EINVAL;
		}