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Thu, 29 Aug 2019 21:04:28 +0200 (CEST) From: Jernej =?utf-8?B?xaBrcmFiZWM=?= To: Boris Brezillon Subject: Re: [PATCH 5/8] media: cedrus: Detect first slice of a frame Date: Thu, 29 Aug 2019 21:04:28 +0200 Message-ID: <3132748.mYbjOY1tKM@jernej-laptop> In-Reply-To: <20190826202831.311c7c20@collabora.com> References: <20190822194500.2071-1-jernej.skrabec@siol.net> <20190822194500.2071-6-jernej.skrabec@siol.net> <20190826202831.311c7c20@collabora.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190829_120445_974189_53E8440D X-CRM114-Status: GOOD ( 14.51 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devel@driverdev.osuosl.org, acourbot@chromium.org, pawel@osciak.com, jonas@kwiboo.se, gregkh@linuxfoundation.org, wens@csie.org, mripard@kernel.org, tfiga@chromium.org, paul.kocialkowski@bootlin.com, kyungmin.park@samsung.com, linux-media@vger.kernel.org, linux-arm-kernel@lists.infradead.org, hverkuil-cisco@xs4all.nl, mchehab@kernel.org, ezequiel@collabora.com, linux-kernel@vger.kernel.org, m.szyprowski@samsung.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Dne ponedeljek, 26. avgust 2019 ob 20:28:31 CEST je Boris Brezillon napisal(a): > Hi Jernej, > > On Thu, 22 Aug 2019 21:44:57 +0200 > > Jernej Skrabec wrote: > > When codec supports multiple slices in one frame, VPU has to know when > > first slice of each frame is being processed, presumably to correctly > > clear/set data in auxiliary buffers. > > > > Add first_slice field to cedrus_run structure and set it according to > > timestamps of capture and output buffers. If timestamps are different, > > it's first slice and viceversa. > > > > Signed-off-by: Jernej Skrabec > > --- > > > > drivers/staging/media/sunxi/cedrus/cedrus.h | 1 + > > drivers/staging/media/sunxi/cedrus/cedrus_dec.c | 2 ++ > > 2 files changed, 3 insertions(+) > > > > diff --git a/drivers/staging/media/sunxi/cedrus/cedrus.h > > b/drivers/staging/media/sunxi/cedrus/cedrus.h index > > 2f017a651848..32cb38e541c6 100644 > > --- a/drivers/staging/media/sunxi/cedrus/cedrus.h > > +++ b/drivers/staging/media/sunxi/cedrus/cedrus.h > > @@ -70,6 +70,7 @@ struct cedrus_mpeg2_run { > > > > struct cedrus_run { > > > > struct vb2_v4l2_buffer *src; > > struct vb2_v4l2_buffer *dst; > > > > + bool first_slice; > > > > union { > > > > struct cedrus_h264_run h264; > > > > diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_dec.c > > b/drivers/staging/media/sunxi/cedrus/cedrus_dec.c index > > 56ca4c9ad01c..d7b54accfe83 100644 > > --- a/drivers/staging/media/sunxi/cedrus/cedrus_dec.c > > +++ b/drivers/staging/media/sunxi/cedrus/cedrus_dec.c > > @@ -31,6 +31,8 @@ void cedrus_device_run(void *priv) > > > > run.src = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx); > > run.dst = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx); > > > > + run.first_slice = > > + run.src->vb2_buf.timestamp != run.dst- >vb2_buf.timestamp; > > Can't we use slice->first_mb_in_slice to determine if a slice is the > first? I'd expect ->first_mb_in_slice to be 0 (unless we decide to > support ASO). I looked in all VPU documentation available to me (which isn't much) and there is no indication if ASO is supported or not. Do you have any sample video with out-of-order slices? It's my understanding that this is uncommon. If it's supported, I would leave code as-is. Best regards, Jernej > > > /* Apply request(s) controls if needed. */ > > src_req = run.src->vb2_buf.req_obj.req; _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel