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Date:   Mon, 16 Nov 2020 13:07:27 +0100 (CET)
From:   Martin Cerveny <martin@c-home.cz>
Reply-To: Martin Cerveny <M.Cerveny@computer.org>
To:     Martin Cerveny <M.Cerveny@computer.org>
cc:     Hans Verkuil <hverkuil@xs4all.nl>,
        Maxime Ripard <mripard@kernel.org>,
        Chen-Yu Tsai <wens@csie.org>, devel@driverdev.osuosl.org,
        devicetree@vger.kernel.org,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        linux-media@vger.kernel.org,
        Mauro Carvalho Chehab <mchehab@kernel.org>,
        Paul Kocialkowski <paul.kocialkowski@bootlin.com>,
        Rob Herring <robh+dt@kernel.org>
Subject: Re: [PATCH v2 0/6] ARM: dts: sun8i: v3s: Enable video decoder
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Hello.

On Mon, 16 Nov 2020, Martin Cerveny wrote:
> On Mon, 16 Nov 2020, Hans Verkuil wrote:
>> On 15/11/2020 19:59, Martin Cerveny wrote:
>>> On Thu, 5 Nov 2020, Hans Verkuil wrote:
>>>> On 12/09/2020 16:30, Martin Cerveny wrote:
>>>>> First patch extends cedrus capability to all decoders
>>>>> because V3s missing MPEG2 decoder.
>>>>> 
>>>>> Next two patches add system control node (SRAM C1) and
>>>>> next three patches add support for Cedrus VPU.
>>>>> 
>>>>> Tested on "Lichee Zero" V3s platform with testing LCD patch
>>>>> ( https://github.com/mcerveny/linux/tree/v3s_videocodec_v4 )
>>>>> and V4L2 raw API testing utility
>>>>> ( https://github.com/mcerveny/v4l2-request-test ):
>>>>> - enabled LCD (DRM dual VI and sigle UI planes)
>>>>> - added RGB panel
>>>>> - enabled PWM
>>>>> 
>>>>> There is low memory on V3s (64MB) and maximum must be available to CMA:
>>>>> - CONFIG_CMA_SIZE_MBYTES=28
>>>>> - add swap to swapout other processes
>>>>> - decrease buffers in v4l2-request-test (.buffers_count from 16 to 6)
>>>>> 
>>>>> Only H.264 decoder working - MPEG and H.265 unsupported by V3s,
>>>>> JPEG/MJPEG still unimplemented, encoder unimplemented
>>>> 
>>>> When I tried to merged these patches I got merge conflicts.
>>>> 
>>>> Possibly due to other 5.10 changes, but certainly because of conflicts
>>>> with patches from Jernej:
>>>> 
>>>> https://patchwork.linuxtv.org/project/linux-media/patch/20200825173523.1289379-4-jernej.skrabec@siol.net/
>>>> https://patchwork.linuxtv.org/project/linux-media/patch/20200825173523.1289379-5-jernej.skrabec@siol.net/
>>>> 
>>>> I've merged Jerne's patches and posted a PR for that:
>>>> https://patchwork.linuxtv.org/project/linux-media/patch/f3b8e5e2-5f0e-fb6f-e5b2-7f44f7e365e7@xs4all.nl/
>>>> 
>>>> Can you rebase your patches on top of my branch that contains Jernej's 
>>>> patches?
>>>> 
>>>> https://git.linuxtv.org/hverkuil/media_tree.git/log/?h=for-v5.11e
>>>> 
>>>> Once my PR is merged into the media_tree master I can take your rebased
>>>> patches.
>>> 
>>> I updated patches:
>>> https://github.com/mcerveny/linux/tree/media_tree_for-v5.11e
>>> 
>>> BUT, commit (555 commits) for v5.10-1
>>> https://github.com/torvalds/linux/commit/fd5c32d80884268a381ed0e67cccef0b3d37750b
>>> disrupts usability of Cedrus H.264 (at least for my Allwinner V3s):
>>> 
>>> 1) colors are disrupted
>>> 
>>> There are missing some initialization now.
>>> 
>>> If I use "5.9" compatible code
>>> (last bisect good point 
>>> https://github.com/torvalds/linux/commit/647412daeb454b6dad12a6c6961ab90aac9e5d29 
>>> )
>>> then reboot (not power-off!) and use new code
>>> ( https://github.com/mcerveny/linux/tree/media_tree_for-v5.11e )
>>> and colors are OK.
>> 
>> Could this or the next issue be related to this bug fix?
>> 
>> https://git.linuxtv.org/media_tree.git/commit/?h=fixes&id=9ac924b98728c3733c91c6c59fc410827d0da49f
>> 
>> That fix isn't yet in our master tree.
>
> Confirmed. It recovers colors !
>
>>> 
>>> 2) decoding of complex streams fails
>>> 
>>> ( https://github.com/mcerveny/v4l2-request-test/tree/v5.10 )
>>> - bbb-h264-all-i-32 - OK
>>> - bbb-h264-32 - bad from frame 5
>>> - bbb-h264-high-32 - bad from frame 6
>> 
>> I think cedrus devs need to take a look at these issues.
>
> Maybe something wrong in my testing code,
> problematic commit swapped some variables between structures :-(
>
> I try to investigate more, regards Martin

Yes. I found new format in ref_pic_list.
I updated test application. All H.264 tests are working now.

https://github.com/mcerveny/v4l2-request-test

Is it necessary to release new "Patch V3" (rebased) series from 
https://github.com/mcerveny/linux/tree/media_tree_for-v5.11e or not ?

Regards, Martin

>> Regards,
>>
>> 	Hans
>> 
>>> 
>>> best regards,
>>> Martin
>>> 
>>>>> Changes since v1:
>>>>> - patch 0005 rename
>>>>> - added testing description
>>>>> 
>>>>> Martin Cerveny (6):
>>>>>   media: cedrus: Register all codecs as capability
>>>>>   dt-bindings: sram: allwinner,sun4i-a10-system-control: Add V3s
>>>>>     compatibles
>>>>>   ARM: dts: sun8i: v3s: Add node for system control
>>>>>   media: cedrus: Add support for V3s
>>>>>   dt-bindings: media: cedrus: Add V3s compatible
>>>>>   ARM: dts: sun8i: v3s: Add video engine node
>>>>>
>>>>>  .../allwinner,sun4i-a10-video-engine.yaml     |  1 +
>>>>>  .../allwinner,sun4i-a10-system-control.yaml   |  6 ++++
>>>>>  arch/arm/boot/dts/sun8i-v3s.dtsi              | 33 +++++++++++++++++++
>>>>>  drivers/staging/media/sunxi/cedrus/cedrus.c   | 28 +++++++++++++++-
>>>>>  drivers/staging/media/sunxi/cedrus/cedrus.h   |  2 ++
>>>>>  .../staging/media/sunxi/cedrus/cedrus_video.c |  2 ++
>>>>>  6 files changed, 71 insertions(+), 1 deletion(-)
>>>>> 
>>>> 
>> 
>