From 2caeeb0c1672c6775963ef7413b0f9566df42b87 Mon Sep 17 00:00:00 2001 From: Jacek Anaszewski Date: Thu, 10 Apr 2014 04:32:17 -0300 Subject: [PATCH] [media] s5p-jpeg: Prevent JPEG 4:2:0 > YUV 4:2:0 decompression 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 Signed-off-by: Kyungmin Park Signed-off-by: Sylwester Nawrocki Signed-off-by: Mauro Carvalho Chehab --- drivers/media/platform/s5p-jpeg/jpeg-core.c | 25 ++++++++++++++++++--- 1 file changed, 22 insertions(+), 3 deletions(-) diff --git a/drivers/media/platform/s5p-jpeg/jpeg-core.c b/drivers/media/platform/s5p-jpeg/jpeg-core.c index ee561fad48b8..6da2c6220353 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 +1087,23 @@ static int s5p_jpeg_try_fmt_vid_cap(struct file *file, void *priv, FMT_TYPE_CAPTURE); } + /* + * Decompression of a JPEG file with 4:2:0 subsampling and odd + * width to the YUV 4:2:0 compliant formats produces a raw image + * with broken luma component. Adjust capture format to RGB565 + * in such a case. + */ + 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); + } + +exit: return vidioc_try_fmt(f, fmt, ctx, FMT_TYPE_CAPTURE); } -- 2.34.1