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From:   Ricardo Ribalda <ribalda@chromium.org>
Date:   Mon, 11 Jan 2021 13:22:06 +0100
Message-ID: <CANiDSCuy9MPK8qpwEz4CTta54i6S=k3DsempGLYssU2NtFGM3Q@mail.gmail.com>
Subject: Re: [PATCH] hantro: Format IOCTLs compliance fixes
To:     Ezequiel Garcia <ezequiel@collabora.com>
Cc:     Philipp Zabel <p.zabel@pengutronix.de>,
        Mauro Carvalho Chehab <mchehab@kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Linux Media Mailing List <linux-media@vger.kernel.org>,
        linux-rockchip@lists.infradead.org, devel@driverdev.osuosl.org,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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Hi Ezequiel

On Mon, Jan 11, 2021 at 12:55 PM Ricardo Ribalda <ribalda@chromium.org> wrote:
>
> Hi Ezequiel
>
> On Mon, Jan 11, 2021 at 12:48 PM Ezequiel Garcia <ezequiel@collabora.com> wrote:
> >
> > Hi Ricardo,
> >
> > On Mon, 2021-01-11 at 12:35 +0100, Ricardo Ribalda wrote:
> > > Clear the reserved fields.
> > >
> > > Fixes:
> > >   fail: v4l2-test-formats.cpp(482): pix_mp.plane_fmt[0].reserved not zeroed
> > > test VIDIOC_TRY_FMT: FAIL
> > >   fail: v4l2-test-formats.cpp(482): pix_mp.plane_fmt[0].reserved not zeroed
> > > test VIDIOC_S_FMT: FAIL
> > >
> > > Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
> > > ---
> > >  drivers/staging/media/hantro/hantro_v4l2.c | 5 +++++
> > >  1 file changed, 5 insertions(+)
> > >
> > > diff --git a/drivers/staging/media/hantro/hantro_v4l2.c b/drivers/staging/media/hantro/hantro_v4l2.c
> > > index b668a82d40ad..9b384fbffc93 100644
> > > --- a/drivers/staging/media/hantro/hantro_v4l2.c
> > > +++ b/drivers/staging/media/hantro/hantro_v4l2.c
> > > @@ -239,6 +239,7 @@ static int hantro_try_fmt(const struct hantro_ctx *ctx,
> > >         const struct hantro_fmt *fmt, *vpu_fmt;
> > >         bool capture = V4L2_TYPE_IS_CAPTURE(type);
> > >         bool coded;
> > > +       int i;
> > >
> > >         coded = capture == ctx->is_encoder;
> > >
> > > @@ -293,6 +294,10 @@ static int hantro_try_fmt(const struct hantro_ctx *ctx,
> > >                         pix_mp->width * pix_mp->height * fmt->max_depth;
> > >         }
> > >
> > > +       for (i = 0; i < pix_mp->num_planes; i++)
> > > +               memset(pix_mp->plane_fmt[i].reserved, 0,
> > > +                      sizeof(pix_mp->plane_fmt[i].reserved));
> > > +
> >
> > This looks like something that should be handled at the core,
> > probably in drivers/media/v4l2-core/v4l2-ioctl.c::v4l_try_fmt().
>
> The core does clear the reserved field from v4l2_pix_format_mplane,

My bad, It is also clearing the per plane reserved field. I was
testing in an old kernel.

The grep it is still valid though. We can remove all the memsets in the drivers.

> but not the reserved field for every plane. I can try to add it to the
> core as well. At least these drivers have code duplication:


>
> git grep reserved | grep memset | grep plane_fmt
> drivers/media/pci/intel/ipu3/ipu3-cio2.c:
> memset(mpix->plane_fmt[0].reserved, 0,
> drivers/media/platform/mtk-mdp/mtk_mdp_m2m.c:
> memset(pix_mp->plane_fmt[i].reserved, 0,
> drivers/media/platform/mtk-vcodec/mtk_vcodec_dec.c:
> memset(&(pix_fmt_mp->plane_fmt[i].reserved[0]), 0x0,
> drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c:
> memset(&(pix_fmt_mp->plane_fmt[i].reserved[0]), 0x0,
> drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c:
> memset(&(pix->plane_fmt[i].reserved[0]), 0x0,
> drivers/media/platform/rcar_fdp1.c:
> memset(pix->plane_fmt[i].reserved, 0,
> drivers/media/platform/rcar_fdp1.c:
> memset(pix->plane_fmt[2].reserved, 0,
> drivers/media/platform/rcar_jpu.c:
> memset(pix->plane_fmt[0].reserved, 0,
> drivers/media/platform/rcar_jpu.c:
> memset(pix->plane_fmt[i].reserved, 0,
> drivers/media/platform/sunxi/sun4i-csi/sun4i_v4l2.c:
> memset(pix->plane_fmt[i].reserved, 0,
> drivers/media/platform/ti-vpe/vpe.c:
> memset(plane_fmt->reserved, 0, sizeof(plane_fmt->reserved));
> drivers/media/test-drivers/vicodec/vicodec-core.c:
> memset(pix_mp->plane_fmt[0].reserved, 0,
> drivers/staging/media/hantro/hantro_v4l2.c:
> memset(pix_mp->plane_fmt[i].reserved, 0,
> drivers/staging/media/ipu3/ipu3-v4l2.c: memset(pixm->plane_fmt[0].reserved, 0,
>
> >
> > Thanks,
> > Ezequiel
> >
>
>
> --
> Ricardo Ribalda


-- 
Ricardo Ribalda