linux-kernel - Re: [PATCH 05/10] media: mtk-vcodec: venc: specify bitrate range per-chip

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Date:   Tue, 16 Jun 2020 17:06:24 +0800
From:   Tiffany Lin <tiffany.lin@...iatek.com>
To:     Alexandre Courbot <acourbot@...omium.org>
CC:     Andrew-CT Chen <andrew-ct.chen@...iatek.com>,
        Rui Wang <gtk_ruiwang@...iatek.com>,
        Yunfei Dong <yunfei.dong@...iatek.com>,
        "Pi-Hsun Shih" <pihsun@...omium.org>,
        Maoguang Meng <maoguang.meng@...iatek.com>,
        <linux-media@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 05/10] media: mtk-vcodec: venc: specify bitrate range
 per-chip

On Wed, 2020-05-20 at 17:27 +0900, Alexandre Courbot wrote:
> Different chips have different supported bitrate ranges. Move the min
> and max supported bitrates to the platform data.
> 

Acked-by: Tiffany Lin <tiffany.lin@...iatek.com>

> Signed-off-by: Alexandre Courbot <acourbot@...omium.org>
> ---
>  drivers/media/platform/mtk-vcodec/mtk_vcodec_drv.h     | 4 ++++
>  drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c     | 3 ++-
>  drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_drv.c | 2 ++
>  3 files changed, 8 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_drv.h b/drivers/media/platform/mtk-vcodec/mtk_vcodec_drv.h
> index e7b155e7432e..b8f913de8d80 100644
> --- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_drv.h
> +++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_drv.h
> @@ -311,12 +311,16 @@ enum mtk_chip {
>   *
>   * @uses_ext: whether the encoder uses the extended firmware messaging format
>   * @has_lt_irq: whether the encoder uses the LT irq
> + * @min_birate: minimum supported encoding bitrate
> + * @max_bitrate: maximum supported encoding bitrate
>   */
>  struct mtk_vcodec_enc_pdata {
>  	enum mtk_chip chip;
>  
>  	bool uses_ext;
>  	bool has_lt_irq;
> +	unsigned long min_bitrate;
> +	unsigned long max_bitrate;
>  };
>  
>  /**
> diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c b/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c
> index d469ff6464b2..50ba9da59153 100644
> --- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c
> +++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c
> @@ -1232,7 +1232,8 @@ 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_MPEG_VIDEO_BITRATE,
> -			1, 4000000, 1, 4000000);
> +			  ctx->dev->venc_pdata->min_bitrate,
> +			  ctx->dev->venc_pdata->max_bitrate, 1, 4000000);
>  	v4l2_ctrl_new_std(handler, ops, V4L2_CID_MPEG_VIDEO_B_FRAMES,
>  			0, 2, 1, 0);
>  	v4l2_ctrl_new_std(handler, ops, V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE,
> diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_drv.c b/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_drv.c
> index c1365209263e..221fa0303075 100644
> --- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_drv.c
> +++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_drv.c
> @@ -380,6 +380,8 @@ static int mtk_vcodec_probe(struct platform_device *pdev)
>  static const struct mtk_vcodec_enc_pdata mt8173_pdata = {
>  	.chip = MTK_MT8173,
>  	.has_lt_irq = true,
> +	.min_bitrate = 1,
> +	.max_bitrate = 4000000,
>  };
>  
>  static const struct of_device_id mtk_vcodec_enc_match[] = {