Prevent decompression of a JPEG 4:2:0 with odd width to
the YUV 4:2:0 compliant formats for Exynos4x12 SoCs and
adjust capture format to RGB565 in such a case. This is
required because the configuration would produce a raw
image with broken luma component.
Signed-off-by: Jacek Anaszewski <j.anaszewski@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
drivers/media/platform/s5p-jpeg/jpeg-core.c | 24 +++++++++++++++++++++---
1 file changed, 21 insertions(+), 3 deletions(-)
diff --git a/drivers/media/platform/s5p-jpeg/jpeg-core.c b/drivers/media/platform/s5p-jpeg/jpeg-core.c
index d266e78..9228bcb 100644
--- a/drivers/media/platform/s5p-jpeg/jpeg-core.c
+++ b/drivers/media/platform/s5p-jpeg/jpeg-core.c
@@ -1064,15 +1064,17 @@ static int s5p_jpeg_try_fmt_vid_cap(struct file *file, void *priv,
return -EINVAL;
}
+ if ((ctx->jpeg->variant->version != SJPEG_EXYNOS4) ||
+ (ctx->mode != S5P_JPEG_DECODE))
+ goto exit;
+
/*
* The exynos4x12 device requires resulting YUV image
* subsampling not to be lower than the input jpeg subsampling.
* If this requirement is not met then downgrade the requested
* capture format to the one with subsampling equal to the input jpeg.
*/
- if ((ctx->jpeg->variant->version == SJPEG_EXYNOS4) &&
- (ctx->mode == S5P_JPEG_DECODE) &&
- (fmt->flags & SJPEG_FMT_NON_RGB) &&
+ if ((fmt->flags & SJPEG_FMT_NON_RGB) &&
(fmt->subsampling < ctx->subsampling)) {
ret = s5p_jpeg_adjust_fourcc_to_subsampling(ctx->subsampling,
fmt->fourcc,
@@ -1085,6 +1087,22 @@ static int s5p_jpeg_try_fmt_vid_cap(struct file *file, void *priv,
FMT_TYPE_CAPTURE);
}
+ if (ctx->subsampling == V4L2_JPEG_CHROMA_SUBSAMPLING_420 &&
+ (ctx->out_q.w & 1) &&
+ (pix->pixelformat == V4L2_PIX_FMT_NV12 ||
+ pix->pixelformat == V4L2_PIX_FMT_NV21 ||
+ pix->pixelformat == V4L2_PIX_FMT_YUV420)) {
+ pix->pixelformat = V4L2_PIX_FMT_RGB565;
+ fmt = s5p_jpeg_find_format(ctx, pix->pixelformat,
+ FMT_TYPE_CAPTURE);
+ v4l2_info(&ctx->jpeg->v4l2_dev,
+ "Adjusted capture fourcc to RGB565. Decompression\n"
+ "of a JPEG file with 4:2:0 subsampling and odd\n"
+ "width to the YUV 4:2:0 compliant formats produces\n"
+ "a raw image with broken luma component.\n");
+ }
+
+exit:
return vidioc_try_fmt(f, fmt, ctx, FMT_TYPE_CAPTURE);
}
--
1.7.9.5
--
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