linux-kernel - Re: [PATCH v6 09/11] media: rkvdec: Add get_image

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Message-ID: <35f60c277e6aa1c9095b80bfb18dbfe8bc4539b5.camel@collabora.com>
Date: Fri, 25 Oct 2024 13:38:24 -0400
From: Nicolas Dufresne <nicolas.dufresne@...labora.com>
To: Jonas Karlman <jonas@...boo.se>, Sebastian Fricke
 <sebastian.fricke@...labora.com>, Ezequiel Garcia
 <ezequiel@...guardiasur.com.ar>, Mauro Carvalho Chehab
 <mchehab@...nel.org>,  Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Alex Bee <knaerzche@...il.com>, Benjamin Gaignard
 <benjamin.gaignard@...labora.com>, Detlev Casanova
 <detlev.casanova@...labora.com>, Dan Carpenter <dan.carpenter@...aro.org>, 
 linux-media@...r.kernel.org, linux-rockchip@...ts.infradead.org, 
 linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org, Christopher
 Obbard <chris.obbard@...labora.com>
Subject: Re: [PATCH v6 09/11] media: rkvdec: Add get_image_fmt ops

Le lundi 09 septembre 2024 à 19:25 +0000, Jonas Karlman a écrit :
> Add support for a get_image_fmt() ops that return the required image
> format.
> 
> The CAPTURE format is reset when required image format changes and the
> buffer queue is not busy.
> 
> Signed-off-by: Jonas Karlman <jonas@...boo.se>
> Tested-by: Nicolas Dufresne <nicolas.dufresne@...labora.com>
> Tested-by: Christopher Obbard <chris.obbard@...labora.com>

Looks good to me.

Reviewed-by: Nicolas Dufresne <nicolas.dufresne@...labora.com>

> ---
> v6:
> - No change
> 
> v5:
> - Collect t-b tags
> 
> v4:
> - Change fmt_opaque into an image format
> - Split patch into two
> 
> v3:
> - New patch
> ---
>  drivers/staging/media/rkvdec/rkvdec.c | 49 +++++++++++++++++++++++++--
>  drivers/staging/media/rkvdec/rkvdec.h |  2 ++
>  2 files changed, 49 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/staging/media/rkvdec/rkvdec.c b/drivers/staging/media/rkvdec/rkvdec.c
> index 467fc05b347a..8df49ee12820 100644
> --- a/drivers/staging/media/rkvdec/rkvdec.c
> +++ b/drivers/staging/media/rkvdec/rkvdec.c
> @@ -111,15 +111,60 @@ static int rkvdec_try_ctrl(struct v4l2_ctrl *ctrl)
>  {
>  	struct rkvdec_ctx *ctx = container_of(ctrl->handler, struct rkvdec_ctx, ctrl_hdl);
>  	const struct rkvdec_coded_fmt_desc *desc = ctx->coded_fmt_desc;
> +	struct v4l2_pix_format_mplane *pix_mp = &ctx->decoded_fmt.fmt.pix_mp;
> +	enum rkvdec_image_fmt image_fmt;
> +	struct vb2_queue *vq;
> +	int ret;
> +
> +	if (desc->ops->try_ctrl) {
> +		ret = desc->ops->try_ctrl(ctx, ctrl);
> +		if (ret)
> +			return ret;
> +	}
> +
> +	if (!desc->ops->get_image_fmt)
> +		return 0;
>  
> -	if (desc->ops->try_ctrl)
> -		return desc->ops->try_ctrl(ctx, ctrl);
> +	image_fmt = desc->ops->get_image_fmt(ctx, ctrl);
> +	if (ctx->image_fmt == image_fmt)
> +		return 0;
> +
> +	if (rkvdec_is_valid_fmt(ctx, pix_mp->pixelformat, image_fmt))
> +		return 0;
> +
> +	/* format change not allowed when queue is busy */
> +	vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx,
> +			     V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE);
> +	if (vb2_is_busy(vq))
> +		return -EINVAL;
> +
> +	return 0;
> +}
> +
> +static int rkvdec_s_ctrl(struct v4l2_ctrl *ctrl)
> +{
> +	struct rkvdec_ctx *ctx = container_of(ctrl->handler, struct rkvdec_ctx, ctrl_hdl);
> +	const struct rkvdec_coded_fmt_desc *desc = ctx->coded_fmt_desc;
> +	struct v4l2_pix_format_mplane *pix_mp = &ctx->decoded_fmt.fmt.pix_mp;
> +	enum rkvdec_image_fmt image_fmt;
> +
> +	if (!desc->ops->get_image_fmt)
> +		return 0;
> +
> +	image_fmt = desc->ops->get_image_fmt(ctx, ctrl);
> +	if (ctx->image_fmt == image_fmt)
> +		return 0;
> +
> +	ctx->image_fmt = image_fmt;
> +	if (!rkvdec_is_valid_fmt(ctx, pix_mp->pixelformat, ctx->image_fmt))
> +		rkvdec_reset_decoded_fmt(ctx);
>  
>  	return 0;
>  }
>  
>  static const struct v4l2_ctrl_ops rkvdec_ctrl_ops = {
>  	.try_ctrl = rkvdec_try_ctrl,
> +	.s_ctrl = rkvdec_s_ctrl,
>  };
>  
>  static const struct rkvdec_ctrl_desc rkvdec_h264_ctrl_descs[] = {
> diff --git a/drivers/staging/media/rkvdec/rkvdec.h b/drivers/staging/media/rkvdec/rkvdec.h
> index 6f8cf50c5d99..e466a2753ccf 100644
> --- a/drivers/staging/media/rkvdec/rkvdec.h
> +++ b/drivers/staging/media/rkvdec/rkvdec.h
> @@ -73,6 +73,8 @@ struct rkvdec_coded_fmt_ops {
>  		     struct vb2_v4l2_buffer *dst_buf,
>  		     enum vb2_buffer_state result);
>  	int (*try_ctrl)(struct rkvdec_ctx *ctx, struct v4l2_ctrl *ctrl);
> +	enum rkvdec_image_fmt (*get_image_fmt)(struct rkvdec_ctx *ctx,
> +					       struct v4l2_ctrl *ctrl);
>  };
>  
>  enum rkvdec_image_fmt {