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 decoded_subsampling_to_v4l2, which performs
HW -> V4L2 translation.
Signed-off-by: Jacek Anaszewski <j.anaszew...@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.p...@samsung.com>
---
drivers/media/platform/s5p-jpeg/jpeg-core.c | 36 ++++++++++++++++++++++-----
1 file changed, 30 insertions(+), 6 deletions(-)
diff --git a/drivers/media/platform/s5p-jpeg/jpeg-core.c
b/drivers/media/platform/s5p-jpeg/jpeg-core.c
index 3605470..90d2f69 100644
--- a/drivers/media/platform/s5p-jpeg/jpeg-core.c
+++ b/drivers/media/platform/s5p-jpeg/jpeg-core.c
@@ -358,6 +358,13 @@ static const unsigned char hactblg0[162] = {
0xf9, 0xfa
};
+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);
@@ -368,6 +375,28 @@ static inline struct s5p_jpeg_ctx *fh_to_ctx(struct
v4l2_fh *fh)
return container_of(fh, struct s5p_jpeg_ctx, fh);
}
+static inline int decoded_subsampling_to_v4l2(struct s5p_jpeg_ctx *ctx)
+{
+ int subsampling;
+
+ WARN_ON(ctx->subsampling > 3);
+
+ if (ctx->jpeg->variant->version == SJPEG_S5P) {
+ if (ctx->subsampling > 2)
+ subsampling = V4L2_JPEG_CHROMA_SUBSAMPLING_GRAY;
+ else
+ subsampling = ctx->subsampling;
+ } else {
+ if (ctx->subsampling > 2)
+ subsampling = V4L2_JPEG_CHROMA_SUBSAMPLING_420;
+ else
+ subsampling =
+ exynos4x12_decoded_subsampling[ctx->subsampling];
+ }
+
+ return subsampling;
+}
+
static inline void s5p_jpeg_set_qtbl(void __iomem *regs,
const unsigned char *qtbl,
unsigned long tab, int len)
@@ -1159,12 +1188,7 @@ 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 = decoded_subsampling_to_v4l2(ctx);
spin_unlock_irqrestore(&jpeg->slock, flags);
break;
}
--
1.7.9.5
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