media: cedrus: Add helper for determining number of elements

Now that controls can be dynamic arrays, we need to know how many
elements are in such array. Add a helper for that.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Reviewed-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

diff --git a/drivers/staging/media/sunxi/cedrus/cedrus.c b/drivers/staging/media/sunxi/cedrus/cedrus.c
index 99c8731..b855e60 100644 (file)
--- a/drivers/staging/media/sunxi/cedrus/cedrus.c
+++ b/drivers/staging/media/sunxi/cedrus/cedrus.c
@@ -232,6 +232,17 @@ void *cedrus_find_control_data(struct cedrus_ctx *ctx, u32 id)
        return NULL;
 }
 
+u32 cedrus_get_num_of_controls(struct cedrus_ctx *ctx, u32 id)
+{
+       unsigned int i;
+
+       for (i = 0; ctx->ctrls[i]; i++)
+               if (ctx->ctrls[i]->id == id)
+                       return ctx->ctrls[i]->elems;
+
+       return 0;
+}
+
 static int cedrus_init_ctrls(struct cedrus_dev *dev, struct cedrus_ctx *ctx)
 {
        struct v4l2_ctrl_handler *hdl = &ctx->hdl;

diff --git a/drivers/staging/media/sunxi/cedrus/cedrus.h b/drivers/staging/media/sunxi/cedrus/cedrus.h
index d2b697a..15a1bdb 100644 (file)
--- a/drivers/staging/media/sunxi/cedrus/cedrus.h
+++ b/drivers/staging/media/sunxi/cedrus/cedrus.h
@@ -261,5 +261,6 @@ vb2_to_cedrus_buffer(const struct vb2_buffer *p)
 }
 
 void *cedrus_find_control_data(struct cedrus_ctx *ctx, u32 id);
+u32 cedrus_get_num_of_controls(struct cedrus_ctx *ctx, u32 id);
 
 #endif