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Message-ID: <be4baa6313d16ed52245347d866dd878049a12a0.camel@collabora.com>
Date: Wed, 07 Aug 2024 09:08:58 -0400
From: Nicolas Dufresne <nicolas.dufresne@...labora.com>
To: Yunfei Dong <yunfei.dong@...iatek.com>, Nícolas "F .
R . A . Prado" <nfraprado@...labora.com>, Sebastian Fricke
<sebastian.fricke@...labora.com>, Hans Verkuil <hverkuil-cisco@...all.nl>,
AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
Benjamin Gaignard <benjamin.gaignard@...labora.com>, Nathan Hebert
<nhebert@...omium.org>, Daniel Almeida <daniel.almeida@...labora.com>
Cc: 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 v4 0/7] media: mediatek: vcodec: fix
v4l2_ctrl_request_complete fail
Hi Yunfei,
Le mercredi 07 août 2024 à 16:24 +0800, Yunfei Dong a écrit :
> v4l2_m2m_buf_done is called in lat work queue, v4l2_ctrl_request_complete
> is called in core queue. The request status of output queue will be set to
> MEDIA_REQUEST_STATE_COMPLETE when v4l2_m2m_buf_done is called, leading to
> output queue request complete fail. Must move v4l2_ctrl_request_complete
> in front of v4l2_m2m_buf_done.
Sebastian and I have analyzed further the issue and the description here does
not seem to match. What happens is that in Stateless decoding, you have to set
header controls out-of-request to negotiate the format at first.
With VP9 notably, the header control is the only control there is. Chromium will
optimize out this and only attach a bitstream buffer to the request. So when the
buffer is mark to done, it is the last object in the request, which implicitly
mark the request as complete.
When v4l2_ctrl_request_complete() is later called, the control code detect that
there is no controls in the request. It then creates an empty control, but
attaching an object to a completed request is not allowed.
>
> Patch 1 setting request complete before buffer done
> Patch 2 change flush decode order when stream off
> Patch 3 flush decoder before stream off
> Patch 4 using input information to get vb2 buffer
> Patch 5 store source vb2 buffer
> Patch 6 replace v4l2_m2m_next_src_buf with v4l2_m2m_src_buf_remove
> Patch 7 remove media request checking
I will give a some testing soon. Can you clarify on if the LAT and the CORE
still runs in parallel after this change ?
Nicolas
>
> ---
> compared with v3:
> - fix flush decoder issue when userspace stream off capture queue firstly
> - fluster test result same with v3
>
> compared with v2:
> - add patch 5/6/7 to fix decode again issue
> - add fluster test result with mt8195 platform(same with no changed):
> 1> ./fluster.py run -d GStreamer-VP8-V4L2SL-Gst1.0 -j1 -t 90
> VP8-TEST-VECTORS 59/61
> 2> ./fluster.py run -d GStreamer-VP9-V4L2SL-Gst1.0 -j1 -t 90
> VP9-TEST-VECTORS 276/305
> 3> ./fluster.py run -d GStreamer-AV1-V4L2SL-Gst1.0 -j1 -t 90
> AV1-TEST-VECTORS 237/239
> 4> ./fluster.py run -d GStreamer-H.264-V4L2SL-Gst1.0 -j1 -t 90
> JVT-AVC_V1 95/135
> 5> ./fluster.py run -d GStreamer-H.265-V4L2SL-Gst1.0 -j1 -t 90
> JCT-VC-HEVC_V1 142/147
>
> compared with v1:
> - add patch 2/3/4 to fix timing issue.
> ---
> Yunfei Dong (7):
> media: mediatek: vcodec: setting request complete before buffer done
> media: mediatek: vcodec: change flush decode order when stream off
> media: mediatek: vcodec: flush decoder before stream off
> media: mediatek: vcodec: using input information to get vb2 buffer
> media: mediatek: vcodec: store source vb2 buffer
> media: mediatek: vcodec: replace v4l2_m2m_next_src_buf with
> v4l2_m2m_src_buf_remove
> media: mediatek: vcodec: remove media request checking
>
> .../mediatek/vcodec/decoder/mtk_vcodec_dec.c | 44 ++++++++---------
> .../vcodec/decoder/mtk_vcodec_dec_drv.h | 4 +-
> .../vcodec/decoder/mtk_vcodec_dec_stateless.c | 48 ++++++++++++++-----
> .../vcodec/decoder/vdec/vdec_av1_req_lat_if.c | 18 +++----
> .../decoder/vdec/vdec_h264_req_multi_if.c | 4 +-
> .../decoder/vdec/vdec_hevc_req_multi_if.c | 4 +-
> .../vcodec/decoder/vdec/vdec_vp9_req_lat_if.c | 19 ++++----
> .../mediatek/vcodec/decoder/vdec_msg_queue.h | 4 +-
> 8 files changed, 85 insertions(+), 60 deletions(-)
>
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