linux-kernel - Re: [PATCH 0/3] Add Amlogic stateless H.264 video decoder for S4

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Message-ID: <t4xy6q.vhi5j58gpfcw@postmarketos.org>
Date: Thu, 30 Oct 2025 10:50:26 +0000
From: Ferass El Hafidi <funderscore@...tmarketos.org>
To: linux-amlogic@...ts.infradead.org, Zhentao Guo <zhentao.guo@...ogic.com>, Christian Hewitt <christianshewitt@...il.com>
Cc: Mauro Carvalho Chehab <mchehab@...nel.org>, Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, Neil Armstrong <neil.armstrong@...aro.org>, Kevin Hilman <khilman@...libre.com>, Jerome Brunet <jbrunet@...libre.com>, Martin Blumenstingl <martin.blumenstingl@...glemail.com>, linux-media@...r.kernel.org, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-amlogic@...ts.infradead.org
Subject: Re: [PATCH 0/3] Add Amlogic stateless H.264 video decoder for S4

On Tue, 28 Oct 2025 11:08, Zhentao Guo <zhentao.guo@...ogic.com> wrote:
>
>在 2025/10/27 20:57, Christian Hewitt 写道:
>> [christianshewitt@...il.com appears similar to someone who previously sent you email, but may not be that person. Learn why this could be a risk at https://aka.ms/LearnAboutSenderIdentification ]
>>
>> [ EXTERNAL EMAIL ]
>>
>>> On 27 Oct 2025, at 9:42 am, Zhentao Guo via B4 Relay <devnull+zhentao.guo.amlogic.com@...nel.org> wrote:
>>>
>>> Introduce initial driver support for Amlogic's new video acceleration
>>> hardware architecture, designed for video stream decoding.
>>>
>>> Compared to the current Amlogic video decoder hardware architecture,
>>> this new implementation eliminates the Esparser hardware component,
>>> enabling direct vb2 buffer input. The driver is designed to support
>>> the V4L2 M2M stateless decoder API. The initial phase includes support
>>> for H.264 decoding on Amlogic S805X2 platform.
>> It would be nice if you can outline the additional hardware the driver
>> plans to support so reviewers have perspective on where we are now, and
>> what more be coming? - the community would also like to understand if
>> this driver will supersede the stalled driver attempt in staging.
>Yes, we will follow Amlogic's overall upstream progress to support more 
>hardware
>platforms in the future. The next step will be adding support for 
>A311D2(T7) platform.
>We also plan to replace the stalled driver with the new stateless 
>decoder driver.
>The new stateless driver is fully compatible with the old G12/SM1 
>platforms, making
>this transition feasible.

That's awesome news! But how about the older platforms such as GXBB
(S905), GXL (S905X) and AXG (A113D)? Will support for them also be added
or not?

I and probably many other people still have interest on these older
SoCs.. they otherwise run Mainline linux mostly fine, so if a working
vdec driver comes along for these, that would be great!

Best regards,
Ferass