media: cedrus: Cleanup control initialization

In order to introduce other controls, the control initialization
needs to support an initial struct v4l2_ctrl_control.

While here, let's cleanup the control initialization,
removing unneeded fields.
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/staging/media/sunxi/cedrus/cedrus.c

@@ -29,44 +29,51 @@
 
 static const struct cedrus_control cedrus_controls[] = {
 	{
+		.cfg = {
 			.id	= V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS,
-		.elem_size	= sizeof(struct v4l2_ctrl_mpeg2_slice_params),
+		},
 		.codec		= CEDRUS_CODEC_MPEG2,
 		.required	= true,
 	},
 	{
+		.cfg = {
 			.id	= V4L2_CID_MPEG_VIDEO_MPEG2_QUANTIZATION,
-		.elem_size	= sizeof(struct v4l2_ctrl_mpeg2_quantization),
+		},
 		.codec		= CEDRUS_CODEC_MPEG2,
 		.required	= false,
 	},
 	{
+		.cfg = {
 			.id	= V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS,
-		.elem_size	= sizeof(struct v4l2_ctrl_h264_decode_params),
+		},
 		.codec		= CEDRUS_CODEC_H264,
 		.required	= true,
 	},
 	{
+		.cfg = {
 			.id	= V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS,
-		.elem_size	= sizeof(struct v4l2_ctrl_h264_slice_params),
+		},
 		.codec		= CEDRUS_CODEC_H264,
 		.required	= true,
 	},
 	{
+		.cfg = {
 			.id	= V4L2_CID_MPEG_VIDEO_H264_SPS,
-		.elem_size	= sizeof(struct v4l2_ctrl_h264_sps),
+		},
 		.codec		= CEDRUS_CODEC_H264,
 		.required	= true,
 	},
 	{
+		.cfg = {
 			.id	= V4L2_CID_MPEG_VIDEO_H264_PPS,
-		.elem_size	= sizeof(struct v4l2_ctrl_h264_pps),
+		},
 		.codec		= CEDRUS_CODEC_H264,
 		.required	= true,
 	},
 	{
+		.cfg = {
 			.id	= V4L2_CID_MPEG_VIDEO_H264_SCALING_MATRIX,
-		.elem_size	= sizeof(struct v4l2_ctrl_h264_scaling_matrix),
+		},
 		.codec		= CEDRUS_CODEC_H264,
 		.required	= true,
 	},
@@ -106,12 +113,8 @@ static int cedrus_init_ctrls(struct cedrus_dev *dev, struct cedrus_ctx *ctx)
 		return -ENOMEM;
 
 	for (i = 0; i < CEDRUS_CONTROLS_COUNT; i++) {
-		struct v4l2_ctrl_config cfg = {};
-
-		cfg.elem_size = cedrus_controls[i].elem_size;
-		cfg.id = cedrus_controls[i].id;
-
-		ctrl = v4l2_ctrl_new_custom(hdl, &cfg, NULL);
+		ctrl = v4l2_ctrl_new_custom(hdl, &cedrus_controls[i].cfg,
+					    NULL);
 		if (hdl->error) {
 			v4l2_err(&dev->v4l2_dev,
 				 "Failed to create new custom control\n");
@@ -178,7 +181,7 @@ static int cedrus_request_validate(struct media_request *req)
 			continue;
 
 		ctrl_test = v4l2_ctrl_request_hdl_ctrl_find(hdl,
-							    cedrus_controls[i].id);
+							    cedrus_controls[i].cfg.id);
 		if (!ctrl_test) {
 			v4l2_info(&ctx->dev->v4l2_dev,
 				  "Missing required codec control\n");

drivers/staging/media/sunxi/cedrus/cedrus.h

@@ -49,8 +49,7 @@ enum cedrus_h264_pic_type {
 };
 
 struct cedrus_control {
-	u32			id;
-	u32			elem_size;
+	struct v4l2_ctrl_config cfg;
 	enum cedrus_codec	codec;
 	unsigned char		required:1;
 };