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

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Date:   Thu, 23 Mar 2023 01:57:20 +0000
From:   Yunfei Dong (董云飞) 
        <Yunfei.Dong@...iatek.com>
To:     "wenst@...omium.org" <wenst@...omium.org>,
        "nfraprado@...labora.com" <nfraprado@...labora.com>,
        "nicolas@...fresne.ca" <nicolas@...fresne.ca>,
        "angelogioacchino.delregno@...labora.com" 
        <angelogioacchino.delregno@...labora.com>,
        "benjamin.gaignard@...labora.com" <benjamin.gaignard@...labora.com>,
        "hverkuil-cisco@...all.nl" <hverkuil-cisco@...all.nl>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>,
        "frkoenig@...omium.org" <frkoenig@...omium.org>,
        "stevecho@...omium.org" <stevecho@...omium.org>,
        "linux-media@...r.kernel.org" <linux-media@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "daniel@...ll.ch" <daniel@...ll.ch>,
        Project_Global_Chrome_Upstream_Group 
        <Project_Global_Chrome_Upstream_Group@...iatek.com>,
        "hsinyi@...omium.org" <hsinyi@...omium.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "matthias.bgg@...il.com" <matthias.bgg@...il.com>
Subject: Re: [PATCH v2,5/7] media: mediatek: vcodec: Get get each instance
 format type

Hi AngeloGioacchino

Thanks for your suggestion.
On Wed, 2023-03-22 at 13:12 +0100, AngeloGioacchino Del Regno wrote:
> External email : Please do not click links or open attachments until
> you have verified the sender or the content.
> 
> 
> 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().
> 
This patch used to get output and capture format for each instance.

Maybe 2 ~ 49 instance to paly video at the same time.

Need to know the format type for each instance.
> Regards,
> Angelo
> 
Best Regards,
Yunfei Dong
>