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

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Message-ID: <3397e2c8-602f-4cd8-8cd5-7af3410edc00@oss.nxp.com>
Date: Wed, 31 Dec 2025 13:37:22 +0800
From: "Ming Qian(OSS)" <ming.qian@....nxp.com>
To: Ulf Hansson <ulf.hansson@...aro.org>
Cc: linux-media@...r.kernel.org, mchehab@...nel.org,
 hverkuil-cisco@...all.nl, nicolas@...fresne.ca,
 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 Uffe,

On 12/30/2025 9:42 PM, Ulf Hansson wrote:
> 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?
> 
> Kind regards
> Uffe

I think you can pick the pmdomain patch separately.

Regards,
Ming