linux-kernel - Re: [PATCH v2,5/7] media: mediatek: vcodec: Get get each instance format type

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Date:   Wed, 22 Mar 2023 13:12:24 +0100
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Yunfei Dong <yunfei.dong@...iatek.com>,
        Chen-Yu Tsai <wenst@...omium.org>,
        Nicolas Dufresne <nicolas@...fresne.ca>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Benjamin Gaignard <benjamin.gaignard@...labora.com>,
        Nícolas F . R . A . Prado 
        <nfraprado@...labora.com>
Cc:     Matthias Brugger <matthias.bgg@...il.com>,
        Hsin-Yi Wang <hsinyi@...omium.org>,
        Fritz Koenig <frkoenig@...omium.org>,
        Daniel Vetter <daniel@...ll.ch>,
        Steve Cho <stevecho@...omium.org>, linux-media@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        Project_Global_Chrome_Upstream_Group@...iatek.com
Subject: Re: [PATCH v2,5/7] media: mediatek: vcodec: Get get each instance
 format type

Il 22/03/23 10:46, Yunfei Dong ha scritto:
> Adding echo command to get capture and output queue format
> type:'echo -format > vdec'
> 
> Signed-off-by: Yunfei Dong <yunfei.dong@...iatek.com>
> ---
>   .../mediatek/vcodec/mtk_vcodec_dbgfs.c        | 48 +++++++++++++++++++
>   .../mediatek/vcodec/mtk_vcodec_dbgfs.h        |  1 +
>   2 files changed, 49 insertions(+)
> 
> diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dbgfs.c b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dbgfs.c
> index 19a1dc068efd..1b1b4301a83d 100644
> --- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dbgfs.c
> +++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dbgfs.c
> @@ -10,6 +10,48 @@
>   #include "mtk_vcodec_drv.h"
>   #include "mtk_vcodec_util.h"
>   
> +static void mtk_vdec_dbgfs_get_format_type(struct mtk_vcodec_ctx *ctx, char *buf,
> +					   int *used, int total)
> +{
> +	int curr_len;
> +
> +	switch (ctx->current_codec) {
> +	case V4L2_PIX_FMT_H264_SLICE:
> +		curr_len = snprintf(buf + *used, total - *used,
> +				    "\toutput format: h264 slice\n");

Isn't this the same information that's also given by the VIDIOC_ENUM_FMT ioctl?

Check functions v4l_enum_fmt(), v4l_fill_fmtdesc().

Regards,
Angelo