[media] s5p-jpeg: Adjust g_volatile_ctrl callback to Exynos4x12 needs
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>
diff --git a/drivers/media/platform/s5p-jpeg/jpeg-core.c b/drivers/media/platform/s5p-jpeg/jpeg-core.c
index 3c06487..a1c78c8 100644
--- a/drivers/media/platform/s5p-jpeg/jpeg-core.c
+++ b/drivers/media/platform/s5p-jpeg/jpeg-core.c
@@ -451,6 +451,13 @@
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 @@
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 @@
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;
}