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From: Boris Brezillon <boris.brezillon@collabora.com>
To: Tomasz Figa <tfiga@chromium.org>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>,
	Hans Verkuil <hans.verkuil@cisco.com>,
	Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
	Sakari Ailus <sakari.ailus@iki.fi>,
	Linux Media Mailing List <linux-media@vger.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Nicolas Dufresne <nicolas@ndufresne.ca>,
	kernel@collabora.com,
	Paul Kocialkowski <paul.kocialkowski@bootlin.com>,
	Ezequiel Garcia <ezequiel@collabora.com>,
	Jonas Karlman <jonas@kwiboo.se>,
	"open list:ARM/Rockchip SoC..."
	<linux-rockchip@lists.infradead.org>,
	Heiko Stuebner <heiko@sntech.de>,
	Andrew Morton <akpm@linux-foundation.org>,
	Rasmus Villemoes <linux@rasmusvillemoes.dk>,
	Philipp Zabel <p.zabel@pengutronix.de>,
	Hertz Wong <hertz.wong@rock-chips.com>
Subject: Re: [PATCH 7/9] media: hantro: Add core bits to support H264 decoding
Date: Thu, 1 Aug 2019 07:42:03 +0200	[thread overview]
Message-ID: <20190801074203.76b439bd@collabora.com> (raw)
In-Reply-To: <CAHD77HksotqFBTE84rRM=DuNFX=YJPs=YnsuFkaN-pWUNCtoxA@mail.gmail.com>

On Thu, 1 Aug 2019 13:06:10 +0900
Tomasz Figa <tfiga@chromium.org> wrote:

> Hi Boris,
> 
> On Wed, Jun 19, 2019 at 9:15 PM Boris Brezillon
> <boris.brezillon@collabora.com> wrote:
> [snip]
> > @@ -533,10 +535,21 @@ hantro_queue_setup(struct vb2_queue *vq, unsigned int *num_buffers,
> >                 return -EINVAL;
> >         }
> >
> > +       /* The H264 decoder needs extra size on the output buffer. */
> > +       if (ctx->vpu_src_fmt->fourcc == V4L2_PIX_FMT_H264_SLICE_RAW)
> > +               extra_size0 = 128 * DIV_ROUND_UP(pixfmt->width, 16) *
> > +                             DIV_ROUND_UP(pixfmt->height, 16);
> > +  
> 
> I wonder if this shouldn't be accounted for already in the sizeimage
> returned by TRY_/S_FMT, so that the application can know the required
> buffer size if it uses some external allocator and DMABUF memory type.
> I know we had it like this in our downstream code, but it wasn't the
> problem because we use minigbm, where we explicitly add the same
> padding in the rockchip backend. Any thoughts?

Actually, I was wondering why it was not counted in ->sizeimage. I
thought you had a good reason to not expose the extra size to userspace
so I kept it like that.

  reply	other threads:[~2019-08-01  5:42 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-19 12:15 [PATCH 0/9] media: hantro: Add support for H264 decoding Boris Brezillon
2019-06-19 12:15 ` [PATCH 1/9] lib/sort.c: implement sort() variant taking context argument Boris Brezillon
2019-07-25 12:40   ` Boris Brezillon
2019-07-26  0:05   ` Andrew Morton
2019-07-26  6:59     ` Rasmus Villemoes
2019-06-19 12:15 ` [PATCH 2/9] media: hantro: Move copy_metadata() before doing a decode operation Boris Brezillon
2019-06-19 12:15 ` [PATCH 3/9] media: hantro: Constify the control array Boris Brezillon
2019-07-05 16:05   ` Ezequiel Garcia
2019-07-05 17:17     ` Boris Brezillon
2019-06-19 12:15 ` [PATCH 4/9] media: hantro: Simplify the controls creation logic Boris Brezillon
2019-06-19 12:15 ` [PATCH 5/9] media: hantro: Add hantro_get_{src,dst}_buf() helpers Boris Brezillon
2019-06-19 12:15 ` [PATCH 6/9] media: hantro: Add helpers to prepare/finish a run Boris Brezillon
2019-06-19 12:15 ` [PATCH 7/9] media: hantro: Add core bits to support H264 decoding Boris Brezillon
2019-07-25 13:31   ` Rasmus Villemoes
2019-07-26 10:06     ` Boris Brezillon
2019-08-01  4:06   ` Tomasz Figa
2019-08-01  5:42     ` Boris Brezillon [this message]
2019-08-01  7:04     ` Paul Kocialkowski
2019-08-01  7:12       ` Tomasz Figa
2019-08-05 18:38     ` Ezequiel Garcia
2019-06-19 12:15 ` [PATCH 8/9] media: hantro: Add support for H264 decoding on G1 Boris Brezillon
2019-06-19 12:15 ` [PATCH 9/9] media: hantro: Enable H264 decoding on rk3288 Boris Brezillon
2019-06-19 12:23 ` [PATCH 0/9] media: hantro: Add support for H264 decoding Boris Brezillon

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