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| author | Jacek Anaszewski <j.anaszewski@samsung.com> | 2014-07-11 17:19:47 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <m.chehab@samsung.com> | 2014-07-31 00:20:14 +0200 |
| commit | 5a71671af3727502386ac9b5497d6436286ed8a9 (patch) | |
| tree | 07179bab3717878f149abea3aebbfd07eeae307c /drivers/media | |
| parent | [media] s5p-jpeg: Assure proper crop rectangle initialization (diff) | |
| download | linux-5a71671af3727502386ac9b5497d6436286ed8a9.tar.xz linux-5a71671af3727502386ac9b5497d6436286ed8a9.zip | |
[media] s5p-jpeg: Prevent erroneous downscaling for Exynos3250 SoC
JPEG codec on Exynos3250 SoC produces broken raw image if a JPEG
image is decoded to YUV420 format and downscaled by a factor
greater than 2. Prevent this by asserting downscale ratio to 2.
Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/platform/s5p-jpeg/jpeg-core.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/media/platform/s5p-jpeg/jpeg-core.c b/drivers/media/platform/s5p-jpeg/jpeg-core.c index 3e3d94dd03f8..eb13fdfb15a3 100644 --- a/drivers/media/platform/s5p-jpeg/jpeg-core.c +++ b/drivers/media/platform/s5p-jpeg/jpeg-core.c @@ -1317,12 +1317,16 @@ static int exynos4_jpeg_get_output_buffer_size(struct s5p_jpeg_ctx *ctx, return w * h * fmt_depth >> 3; } +static int exynos3250_jpeg_try_downscale(struct s5p_jpeg_ctx *ctx, + struct v4l2_rect *r); + static int s5p_jpeg_s_fmt(struct s5p_jpeg_ctx *ct, struct v4l2_format *f) { struct vb2_queue *vq; struct s5p_jpeg_q_data *q_data = NULL; struct v4l2_pix_format *pix = &f->fmt.pix; struct v4l2_ctrl *ctrl_subs; + struct v4l2_rect scale_rect; unsigned int f_type; vq = v4l2_m2m_get_vq(ct->fh.m2m_ctx, f->type); @@ -1382,6 +1386,20 @@ static int s5p_jpeg_s_fmt(struct s5p_jpeg_ctx *ct, struct v4l2_format *f) ct->crop_rect.width = pix->width; ct->crop_rect.height = pix->height; } + + /* + * Prevent downscaling to YUV420 format by more than 2 + * for Exynos3250 SoC as it produces broken raw image + * in such cases. + */ + if (ct->mode == S5P_JPEG_DECODE && + f_type == FMT_TYPE_CAPTURE && + ct->jpeg->variant->version == SJPEG_EXYNOS3250 && + pix->pixelformat == V4L2_PIX_FMT_YUV420 && + ct->scale_factor > 2) { + scale_rect.width = ct->out_q.w / 2; + scale_rect.height = ct->out_q.h / 2; + exynos3250_jpeg_try_downscale(ct, &scale_rect); } return 0; |