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

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Message-ID: <fcfa00b5ae102d76b02ce1667d27822e6d2c3c81.camel@ndufresne.ca>
Date: Thu, 04 Sep 2025 09:25:03 -0400
From: Nicolas Dufresne <nicolas@...fresne.ca>
To: Marek Vasut <marek.vasut@...lbox.org>, Nas Chung
 <nas.chung@...psnmedia.com>, 	mchehab@...nel.org, hverkuil@...all.nl,
 sebastian.fricke@...labora.com, 	robh@...nel.org, krzk+dt@...nel.org,
 conor+dt@...nel.org
Cc: linux-media@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-imx@....com,
 jackson.lee@...psnmedia.com, 	lafley.kim@...psnmedia.com
Subject: Re: [PATCH v2 0/8] Add support for Wave6 video codec driver

Hi,

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.

Nicolas

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