media: coda: extend GOP size range

CodaDx6 only accepts GOP sizes up to 60 frames, but CODA960 can handle
up to 99 frames. If we disable automatic I frame generation altogether
by setting GOP size to 0, we can let an application produce arbitrarily
large I frame intervals using the V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME
control.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/platform/coda/coda-common.c

@@ -1746,10 +1746,12 @@ static const struct v4l2_ctrl_ops coda_ctrl_ops = {
 
 static void coda_encode_ctrls(struct coda_ctx *ctx)
 {
+	int max_gop_size = (ctx->dev->devtype->product == CODA_DX6) ? 60 : 99;
+
 	v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
 		V4L2_CID_MPEG_VIDEO_BITRATE, 0, 32767000, 1000, 0);
 	v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
-		V4L2_CID_MPEG_VIDEO_GOP_SIZE, 1, 60, 1, 16);
+		V4L2_CID_MPEG_VIDEO_GOP_SIZE, 0, max_gop_size, 1, 16);
 	v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
 		V4L2_CID_MPEG_VIDEO_H264_I_FRAME_QP, 0, 51, 1, 25);
 	v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,