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 <[email protected]> Reviewed-by: Ezequiel Garcia <[email protected]> Signed-off-by: Hans Verkuil <[email protected]> Signed-off-by: Mauro Carvalho Chehab <[email protected]>
niw · Jul 17, 2022 · c6618d2 · c6618d2
1 parent 0ede8c8
commit c6618d2
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diff --git 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
@@ -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
-Original file line number
+Diff line change
@@ Expand Up / @@ -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