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gpu: ipu-v3: image-convert: fix output seam valid interval

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This fixes a failure to determine any seam if the output size is
exactly 1024 multiplied by the number of tiles in a given direction.
In that case an empty interval out_start == out_end is being passed
to find_best_seam, which looks for a seam out_start <= x < out_end.

Also reduce the interval for all but the left column / top row, to
avoid returning position 0 as best fit.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
This commit is contained in:
Philipp Zabel 2019-08-13 14:30:25 +02:00
parent ca84b1b860
commit 82c3e948cc
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/ipu-v3/ipu-image-convert.c
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@ -489,9 +489,9 @@ static void find_best_seam(struct ipu_image_convert_ctx *ctx,
unsigned int out_end;
/* Start within 1024 pixels of the right / bottom edge */
out_start = max_t(int, 0, out_edge - 1024);
out_start = max_t(int, index * out_align, out_edge - 1024);
/* End before having to add more columns to the left / rows above */
out_end = min_t(unsigned int, out_edge, index * 1024);
out_end = min_t(unsigned int, out_edge, index * 1024 + 1);
/*
* Output tiles must start at a multiple of 8 bytes horizontally and