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>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/gpu/ipu-v3/ipu-ic.c b/drivers/gpu/ipu-v3/ipu-ic.c
index ad75588e1629..1dcb96ccda66 100644
--- a/drivers/gpu/ipu-v3/ipu-ic.c
+++ b/drivers/gpu/ipu-v3/ipu-ic.c
@@ -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;
         }