[PATCH 7/7] gpu: ipu-v3: image-convert: only sample into the next tile if necessary

[Philipp Zabel]

The first pixel of the next tile is only sampled by the hardware if the
fractional input position corresponding to the last written output pixel
is not an integer position.

Signed-off-by: Philipp Zabel <p.zabel at pengutronix.de>
---
 drivers/gpu/ipu-v3/ipu-image-convert.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/ipu-v3/ipu-image-convert.c b/drivers/gpu/ipu-v3/ipu-image-convert.c
index cc237c1f32f0..06d658c8ca3b 100644
--- a/drivers/gpu/ipu-v3/ipu-image-convert.c
+++ b/drivers/gpu/ipu-v3/ipu-image-convert.c
@@ -1149,7 +1149,7 @@ static void calc_tile_resize_coefficients(struct ipu_image_convert_ctx *ctx)
 		 * burst size.
 		 */
 		last_output = resized_width - 1;
-		if (closest)
+		if (closest && ((last_output * resize_coeff_h) % 8192))
 			last_output++;
 		in_width = round_up(
 			(DIV_ROUND_UP(last_output * resize_coeff_h, 8192) + 1)
@@ -1206,7 +1206,7 @@ static void calc_tile_resize_coefficients(struct ipu_image_convert_ctx *ctx)
 		 * IDMAC restrictions.
 		 */
 		last_output = resized_height - 1;
-		if (closest)
+		if (closest && ((last_output * resize_coeff_v) % 8192))
 			last_output++;
 		in_height = round_up(
 			(DIV_ROUND_UP(last_output * resize_coeff_v, 8192) + 1)
-- 
2.20.1