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[media] s5p-jpeg: Adjust g_volatile_ctrl callback to Exynos4x12 needs

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Whereas S5PC210 device produces decoded JPEG subsampling values that
map on V4L2_JPEG_CHROMA_SUBSAMPLNG values, the Exynos4x12 device
doesn't. This patch adds helper function s5p_jpeg_to_user_subsampling,
which performs suitable translation.

Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Jacek Anaszewski 2013-12-18 11:14:00 -03:00 committed by Mauro Carvalho Chehab
parent 11fbea3ef3
commit 303b0a96f0
1 changed files with 23 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
drivers/media/platform/s5p-jpeg/jpeg-core.c
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@ -451,6 +451,13 @@ static int s5p_jpeg_adjust_fourcc_to_subsampling(
return 0;
}
static int exynos4x12_decoded_subsampling[] = {
V4L2_JPEG_CHROMA_SUBSAMPLING_GRAY,
V4L2_JPEG_CHROMA_SUBSAMPLING_444,
V4L2_JPEG_CHROMA_SUBSAMPLING_422,
V4L2_JPEG_CHROMA_SUBSAMPLING_420,
};
static inline struct s5p_jpeg_ctx *ctrl_to_ctx(struct v4l2_ctrl *c)
{
return container_of(c->handler, struct s5p_jpeg_ctx, ctrl_handler);
@ -461,6 +468,21 @@ static inline struct s5p_jpeg_ctx *fh_to_ctx(struct v4l2_fh *fh)
return container_of(fh, struct s5p_jpeg_ctx, fh);
}
static int s5p_jpeg_to_user_subsampling(struct s5p_jpeg_ctx *ctx)
{
WARN_ON(ctx->subsampling > 3);
if (ctx->jpeg->variant->version == SJPEG_S5P) {
if (ctx->subsampling > 2)
return V4L2_JPEG_CHROMA_SUBSAMPLING_GRAY;
return ctx->subsampling;
} else {
if (ctx->subsampling > 2)
return V4L2_JPEG_CHROMA_SUBSAMPLING_420;
return exynos4x12_decoded_subsampling[ctx->subsampling];
}
}
static inline void s5p_jpeg_set_qtbl(void __iomem *regs,
const unsigned char *qtbl,
unsigned long tab, int len)
@ -1200,12 +1222,7 @@ static int s5p_jpeg_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
switch (ctrl->id) {
case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
spin_lock_irqsave(&jpeg->slock, flags);
WARN_ON(ctx->subsampling > S5P_SUBSAMPLING_MODE_GRAY);
if (ctx->subsampling > 2)
ctrl->val = V4L2_JPEG_CHROMA_SUBSAMPLING_GRAY;
else
ctrl->val = ctx->subsampling;
ctrl->val = s5p_jpeg_to_user_subsampling(ctx);
spin_unlock_irqrestore(&jpeg->slock, flags);
break;
}