media: mtk-vcodec: venc support MIN_OUTPUT_BUFFERS control

This control is required by v4l2-compliance for encoders. A value of 1
should be suitable for all scenarios.

Signed-off-by: Alexandre Courbot <acourbot@chromium.org>
Acked-by: Tiffany Lin <tiffany.lin@mediatek.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c b/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c
index a9d2c77..bc3095b 100644 (file)
--- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c
+++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c
@@ -1206,6 +1206,8 @@ int mtk_vcodec_enc_ctrls_setup(struct mtk_vcodec_ctx *ctx)
 
        v4l2_ctrl_handler_init(handler, MTK_MAX_CTRLS_HINT);
 
+       v4l2_ctrl_new_std(handler, ops, V4L2_CID_MIN_BUFFERS_FOR_OUTPUT,
+                         1, 1, 1, 1);
        v4l2_ctrl_new_std(handler, ops, V4L2_CID_MPEG_VIDEO_BITRATE,
                          ctx->dev->venc_pdata->min_bitrate,
                          ctx->dev->venc_pdata->max_bitrate, 1, 4000000);