linux-kernel - Re: [PATCH v4 0/3] Fix concurrency issues between G1 and G2 on

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Message-ID: <4d885ca36bef3e8227f8e0ee80bf5bcc3959e9ce.camel@ndufresne.ca>
Date: Mon, 05 Jan 2026 13:10:02 -0500
From: Nicolas Dufresne <nicolas@...fresne.ca>
To: Ulf Hansson <ulf.hansson@...aro.org>, ming.qian@....nxp.com
Cc: linux-media@...r.kernel.org, mchehab@...nel.org,
 hverkuil-cisco@...all.nl, 	benjamin.gaignard@...labora.com,
 p.zabel@...gutronix.de, 	sebastian.fricke@...labora.com,
 shawnguo@...nel.org, s.hauer@...gutronix.de, 	kernel@...gutronix.de,
 festevam@...il.com, linux-imx@....com, 	l.stach@...gutronix.de,
 Frank.li@....com, peng.fan@....com, eagle.zhou@....com, 
	imx@...ts.linux.dev, linux-pm@...r.kernel.org,
 linux-kernel@...r.kernel.org, 	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v4 0/3] Fix concurrency issues between G1 and G2 on

Hi,

Le mardi 30 décembre 2025 à 14:42 +0100, Ulf Hansson a écrit :
> On Fri, 5 Dec 2025 at 02:55, <ming.qian@....nxp.com> wrote:
> > 
> > From: Ming Qian <ming.qian@....nxp.com>
> > 
> > On the i.MX8MQ, we encountered some concurrency issues with H264 and HEVC
> > decoding.
> > 
> > There are two main reasons:
> > 1. The vpu blk-ctrl don't have separate reset and clock enable bits.
> > 2. The g1 VPU and g2 VPU cannot decode simultaneously.
> > 
> > We attempted to make corresponding fix to address these two issues.
> > 
> > Ming Qian (2):
> >   pmdomain: imx8m-blk-ctrl: Remove separate rst and clk mask for 8mq vpu
> >   media: verisilicon: Avoid G2 bus error while decoding H.264 and HEVC
> > 
> > Nicolas Dufresne (1):
> >   media: v4l2-mem2mem: Add a kref to the v4l2_m2m_dev structure
> > 
> >  drivers/media/platform/verisilicon/hantro.h   |  2 +
> >  .../media/platform/verisilicon/hantro_drv.c   | 42 +++++++++++++++++--
> >  .../media/platform/verisilicon/imx8m_vpu_hw.c |  8 ++++
> >  drivers/media/v4l2-core/v4l2-mem2mem.c        | 23 ++++++++++
> >  drivers/pmdomain/imx/imx8m-blk-ctrl.c         | 11 +++--
> >  include/media/v4l2-mem2mem.h                  | 21 ++++++++++
> >  6 files changed, 100 insertions(+), 7 deletions(-)
> > 
> 
> Can I pick the pmdomain patch separately from the others? Or does this
> need to go together?

I believe you did already, and its perfect, we have picked the rest in the media
tree now.

regards,
Nicolas

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