linux-kernel - Re: [EXT] Re: [PATCH v2 0/8] Add support for Wave6 video codec driver

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Message-ID: <2c431e9a-9e2f-4583-bf03-142b56439a47@mailbox.org>
Date: Sat, 11 Oct 2025 12:56:17 +0200
From: Marek Vasut <marek.vasut@...lbox.org>
To: Ming Qian <ming.qian@....com>, Nicolas Dufresne <nicolas@...fresne.ca>,
 Nas Chung <nas.chung@...psnmedia.com>,
 "mchehab@...nel.org" <mchehab@...nel.org>,
 "hverkuil@...all.nl" <hverkuil@...all.nl>,
 "sebastian.fricke@...labora.com" <sebastian.fricke@...labora.com>,
 "robh@...nel.org" <robh@...nel.org>, "krzk+dt@...nel.org"
 <krzk+dt@...nel.org>, "conor+dt@...nel.org" <conor+dt@...nel.org>
Cc: "linux-media@...r.kernel.org" <linux-media@...r.kernel.org>,
 "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
 "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
 dl-linux-imx <linux-imx@....com>,
 "jackson.lee@...psnmedia.com" <jackson.lee@...psnmedia.com>,
 "lafley.kim@...psnmedia.com" <lafley.kim@...psnmedia.com>
Subject: Re: [EXT] Re: [PATCH v2 0/8] Add support for Wave6 video codec driver

On 9/5/25 3:22 AM, Ming Qian wrote:

Hello everyone,

>>>> Le mercredi 03 septembre 2025 à 23:47 +0200, Marek Vasut a écrit :
>>>>> On 4/22/25 11:31 AM, Nas Chung wrote:
>>>>>> This patch series introduces support for the Chips&Media Wave6
>>>>>> video codec IP, a completely different hardware architecture compared
>> to Wave5.
>>>>>>
>>>>>> The wave6 driver is a M2M stateful encoder/decoder driver.
>>>>>> It supports various video formats, including H.264 and H.265,
>>>>>> for both encoding and decoding.
>>>>>> While other versions of the Wave6 IP may support VP9 decoding
>>>>>> and
>>>>>> AV1 decoding and encoding those formats are not implemented or
>>>>>> validated in this driver at this time.
>>>>>>
>>>>>> On NXP i.MX SoCs, the Wave6 IP functionality is split between two
>> regions:
>>>>>> VPU Control region, Manages shared resources such as firmware
>> memory.
>>>>>> VPU Core region, Provides encoding and decoding capabilities.
>>>>>> The VPU core cannot operate independently without the VPU control
>> region.
>>>>>>
>>>>>> This driver has been tested with GStreamer on:
>>>>>> - NXP i.MX95 board
>>>>>> - pre-silicon FPGA environment
>>>>>>
>>>>>> Test results for decoder fluster:
>>>>>> - JVT-AVC_V1, Ran 77/135 tests successfully              in
>>>>>> 35.519 secs
>>>>>> - JVT-FR-EXT, Ran 25/69 tests successfully               in
>>>>>> 17.725 secs
>>>>>> - JCT-VC-HEVC_V1, Ran 132/147 tests successfully         in
>>>>>> 81.549 secs
>>>>>> - All failures are due to unsupported hardware features:
>>>>>> -- 10bit, Resolutions higher than 4K, FMO, MBAFF
>>>>>> -- Extended profile, Field encoding and High422 sreams.
>>>>>>
>>>>>> Test results for v4l2-compliance:
>>>>>> v4l2-compliance 1.29.0-5359, 64 bits, 64-bit time_t
>>>>>> v4l2-compliance SHA: 2a91a869eb8a 2025-04-12 11:35:53
>>>>>>
>>>>>> Compliance test for wave6-dec device /dev/video0:
>>>>>>                    fail:
>>>>>> ../utils/v4l2-compliance/v4l2-test-controls.cpp(1180):
>>>>>> !have_source_change || !have_eos
>>>>>>            test VIDIOC_(UN)SUBSCRIBE_EVENT/DQEVENT: FAIL Total
>>>>>> for wave6-dec device /dev/video0: 48, Succeeded: 47, Failed: 1,
>>>>>> Warnings: 0
>>>>>>
>>>>>> Compliance test for wave6-enc device /dev/video1:
>>>>>>                    fail:
>>>>>> ../utils/v4l2-compliance/v4l2-test-controls.cpp(1169):
>>>>>> node->codec_mask & STATEFUL_ENCODER
>>>>>>            test VIDIOC_(UN)SUBSCRIBE_EVENT/DQEVENT: FAIL Total
>>>>>> for wave6-enc device /dev/video1: 48, Succeeded: 47, Failed: 1,
>>>>>> Warnings: 0
>>>>>>
>>>>>> Note: the failures are all related with the eos event.
>>>>>
>>>>> For what its worth, the whole series:
>>>>>
>>>>> Tested-by: Marek Vasut <marek.vasut@...lbox.org> # NXP i.MX95 rev.
>>>>> A0
>>>>
>>>> Do you mind sharing what tests you have done ? Are you confirming
>>>> the same fluster and compliance results, have you done more ? Since
>>>> this is largely inspired on Wave5, I'd like to see people testing
>>>> real-world playback, with seeks, dynamic resolution changes, data
>>>> lost. On Wave5, latest performance patches leads to crash or hangs.
>>> I did not use fluster this time, I used h264 decode of 1920x1080 60
>>> FPS stream. The pipeline was very basic, something along the lines of:
>>>
>>> gst-launch-1.0 -v filesrc location=/test.mp4 ! qtdemux ! h264parse !
>>> v4l2h264dec ! fpsdisplaysink text-overlay=false video-sink=waylandsink
>>
>> Thanks for the detail. Since you have a running setup, perhaps consider testing
>> with the following, left/right keyboard arrow will let you jump around in the
>> media.
>>
>>   gst-play-1.0 --audiosink=fakeaudiosink --videosink=waylandsink /test.mp4
>>
>> That would at least cover seeking use cases. I provided Nas a stream that
>> aggressively do resolution changes to reproduce a Wave5 crash, I would expect
>> him to test and report against Wave6 too. If you'd like to have that sample, let
>> me know, its not very big, and free, but I'd rather not do attachements over the
>> mailing list.
> 
> Would you please share the stream to me? I want to test this resolution-change case too.
How can we proceed with the wave6 driver upstreaming ?