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gpu: ipu-v3: image-convert: bail on invalid tile sizes 

If we managed to create tiles sized 0x0 because of a bug in the seam
calculation, return with an error message instead of letting the driver
run into a division by zero later. Also check for tile sizes that are
larger than supported by the hardware.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
This commit is contained in:
Philipp Zabel 2019-08-13 14:39:50 +02:00
parent de2564c70f
commit 5fb8b650cc
1 changed files with 24 additions and 3 deletions
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25
drivers/gpu/ipu-v3/ipu-image-convert.c
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@ -836,13 +836,21 @@ static void find_seams(struct ipu_image_convert_ctx *ctx,
in_bottom, flipped_out_top, out_bottom);
}
static void calc_tile_dimensions(struct ipu_image_convert_ctx *ctx,
static int calc_tile_dimensions(struct ipu_image_convert_ctx *ctx,
struct ipu_image_convert_image *image)
{
struct ipu_image_convert_chan *chan = ctx->chan;
struct ipu_image_convert_priv *priv = chan->priv;
unsigned int max_width = 1024;
unsigned int max_height = 1024;
unsigned int i;
if (image->type == IMAGE_CONVERT_IN) {
/* Up to 4096x4096 input tile size */
max_width <<= ctx->downsize_coeff_h;
max_height <<= ctx->downsize_coeff_v;
}
for (i = 0; i < ctx->num_tiles; i++) {
struct ipu_image_tile *tile;
const unsigned int row = i / image->num_cols;
@ -872,7 +880,17 @@ static void calc_tile_dimensions(struct ipu_image_convert_ctx *ctx,
image->type == IMAGE_CONVERT_IN ? "Input" : "Output",
row, col,
tile->width, tile->height, tile->left, tile->top);
if (!tile->width || tile->width > max_width ||
!tile->height || tile->height > max_height) {
dev_err(priv->ipu->dev, "invalid %s tile size: %ux%u\n",
image->type == IMAGE_CONVERT_IN ? "input" :
"output", tile->width, tile->height);
return -EINVAL;
}
}
return 0;
}
/*
@ -2083,7 +2101,10 @@ ipu_image_convert_prepare(struct ipu_soc *ipu, enum ipu_ic_task ic_task,
find_seams(ctx, s_image, d_image);
calc_tile_dimensions(ctx, s_image);
ret = calc_tile_dimensions(ctx, s_image);
if (ret)
goto out_free;
ret = calc_tile_offsets(ctx, s_image);
if (ret)
goto out_free;