linux-kernel - [PATCH v4 12/17] media: mtk-vcodec: venc support MIN_OUTPUT

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Date:   Fri, 21 Aug 2020 19:36:03 +0900
From:   Alexandre Courbot <acourbot@...omium.org>
To:     Tiffany Lin <tiffany.lin@...iatek.com>,
        Andrew-CT Chen <andrew-ct.chen@...iatek.com>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Yunfei Dong <yunfei.dong@...iatek.com>,
        Maoguang Meng <maoguang.meng@...iatek.com>,
        Matthias Brugger <matthias.bgg@...il.com>
Cc:     linux-media@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Alexandre Courbot <acourbot@...omium.org>
Subject: [PATCH v4 12/17] 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@...omium.org>
Acked-by: Tiffany Lin <tiffany.lin@...iatek.com>
---
 drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c b/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c
index f2ba19c32400..f833aee4a06f 100644
--- 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);
-- 
2.28.0.297.g1956fa8f8d-goog