Re: [PATCH v2 1/2] arm64: dts: rockchip: Add the vdpu381 Video Decoders on RK3588

From: Link Mauve <linkmauve@linkmauve.fr>
To: Detlev Casanova <detlev.casanova@collabora.com>
Cc: linux-kernel@vger.kernel.org, Rob Herring <robh@kernel.org>,
	Krzysztof Kozlowski <krzk+dt@kernel.org>,
	Conor Dooley <conor+dt@kernel.org>,
	Heiko Stuebner <heiko@sntech.de>,
	Nicolas Frattaroli <nicolas.frattaroli@collabora.com>,
	Kever Yang <kever.yang@rock-chips.com>,
	Shawn Lin <shawn.lin@rock-chips.com>,
	Sebastian Reichel <sebastian.reichel@collabora.com>,
	Cristian Ciocaltea <cristian.ciocaltea@collabora.com>,
	Dragan Simic <dsimic@manjaro.org>,
	Niklas Cassel <cassel@kernel.org>,
	Damon Ding <damon.ding@rock-chips.com>,
	Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>,
	Alexey Charkov <alchark@gmail.com>,
	Patrick Wildt <patrick@blueri.se>,
	Chukun Pan <amadeus@jmu.edu.cn>,
	Diederik de Haas <didi.debian@cknow.org>,
	Chris Morgan <macromorgan@hotmail.com>,
	devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-rockchip@lists.infradead.org, kernel@collabora.com
Subject: Re: [PATCH v2 1/2] arm64: dts: rockchip: Add the vdpu381 Video Decoders on RK3588
Date: Sun, 10 Aug 2025 21:22:54 +0200	[thread overview]
Message-ID: <aJjxjgG1gEaKBVwE@desktop> (raw)
In-Reply-To: <20250808193602.142527-2-detlev.casanova@collabora.com>

Hi,

On Fri, Aug 08, 2025 at 03:36:01PM -0400, Detlev Casanova wrote:
> Add the vdpu381 Video Decoders to the rk3588-base devicetree.
> 
> The RK3588 based SoCs all embed 2 vdpu381 decoders.
> This also adds the dedicated IOMMU controllers.

Back in the VEPU121 enablement series[1] it had been decided to not
expose multiple identical cores yet, because there is no infrastructure
yet in the kernel to schedule multiple userland processes on multiple
cores, or (more relevant for your usecase) to even combine two cores to
reach 8K support.

> 
> Signed-off-by: Detlev Casanova <detlev.casanova@collabora.com>
> ---
>  arch/arm64/boot/dts/rockchip/rk3588-base.dtsi | 74 +++++++++++++++++++
>  1 file changed, 74 insertions(+)
> 

[snip]

Thanks,

[1] https://lore.kernel.org/all/20240618183816.77597-1-sebastian.reichel@collabora.com/

-- 
Link Mauve