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authorJacek Anaszewski <j.anaszewski@samsung.com>2014-07-11 15:19:48 (GMT)
committerMauro Carvalho Chehab <m.chehab@samsung.com>2014-07-30 22:21:07 (GMT)
commit39c344c4487a23c1399c384b78399b5947a47b50 (patch)
tree5725dd1c6b5f5ba9a65eddba8f07b6de2121682d
parent5a71671af3727502386ac9b5497d6436286ed8a9 (diff)
[media] s5p-jpeg: add chroma subsampling adjustment for Exynos3250
Take into account limitations specific to the Exynos3250 SoC, regarding setting the chroma subsampling control's value. 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>
-rw-r--r--drivers/media/platform/s5p-jpeg/jpeg-core.c59
1 files changed, 38 insertions, 21 deletions
diff --git a/drivers/media/platform/s5p-jpeg/jpeg-core.c b/drivers/media/platform/s5p-jpeg/jpeg-core.c
index eb13fdf..e66acbc 100644
--- a/drivers/media/platform/s5p-jpeg/jpeg-core.c
+++ b/drivers/media/platform/s5p-jpeg/jpeg-core.c
@@ -1603,36 +1603,53 @@ static int s5p_jpeg_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
return 0;
}
-static int s5p_jpeg_try_ctrl(struct v4l2_ctrl *ctrl)
+static int s5p_jpeg_adjust_subs_ctrl(struct s5p_jpeg_ctx *ctx, int *ctrl_val)
{
- struct s5p_jpeg_ctx *ctx = ctrl_to_ctx(ctrl);
- unsigned long flags;
- int ret = 0;
-
- spin_lock_irqsave(&ctx->jpeg->slock, flags);
-
- if (ctrl->id == V4L2_CID_JPEG_CHROMA_SUBSAMPLING) {
- if (ctx->jpeg->variant->version == SJPEG_S5P)
- goto error_free;
+ switch (ctx->jpeg->variant->version) {
+ case SJPEG_S5P:
+ return 0;
+ case SJPEG_EXYNOS3250:
+ /*
+ * The exynos3250 device can produce JPEG image only
+ * of 4:4:4 subsampling when given RGB32 source image.
+ */
+ if (ctx->out_q.fmt->fourcc == V4L2_PIX_FMT_RGB32)
+ *ctrl_val = 0;
+ break;
+ case SJPEG_EXYNOS4:
/*
* The exynos4x12 device requires input raw image fourcc
* to be V4L2_PIX_FMT_GREY if gray jpeg format
* is to be set.
*/
if (ctx->out_q.fmt->fourcc != V4L2_PIX_FMT_GREY &&
- ctrl->val == V4L2_JPEG_CHROMA_SUBSAMPLING_GRAY) {
- ret = -EINVAL;
- goto error_free;
- }
- /*
- * The exynos4x12 device requires resulting jpeg subsampling
- * not to be lower than the input raw image subsampling.
- */
- if (ctx->out_q.fmt->subsampling > ctrl->val)
- ctrl->val = ctx->out_q.fmt->subsampling;
+ *ctrl_val == V4L2_JPEG_CHROMA_SUBSAMPLING_GRAY)
+ return -EINVAL;
+ break;
}
-error_free:
+ /*
+ * The exynos4x12 and exynos3250 devices require resulting
+ * jpeg subsampling not to be lower than the input raw image
+ * subsampling.
+ */
+ if (ctx->out_q.fmt->subsampling > *ctrl_val)
+ *ctrl_val = ctx->out_q.fmt->subsampling;
+
+ return 0;
+}
+
+static int s5p_jpeg_try_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct s5p_jpeg_ctx *ctx = ctrl_to_ctx(ctrl);
+ unsigned long flags;
+ int ret = 0;
+
+ spin_lock_irqsave(&ctx->jpeg->slock, flags);
+
+ if (ctrl->id == V4L2_CID_JPEG_CHROMA_SUBSAMPLING)
+ ret = s5p_jpeg_adjust_subs_ctrl(ctx, &ctrl->val);
+
spin_unlock_irqrestore(&ctx->jpeg->slock, flags);
return ret;
}

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