linux-kernel - Re: [PATCH 1/2] arm64: dts: rockchip: Use "dma-noncoherent" in base RK3588 SoC dtsi

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Message-ID: <87a5choyxg.wl-maz@kernel.org>
Date: Fri, 27 Dec 2024 16:47:39 +0000
From: Marc Zyngier <maz@...nel.org>
To: Dragan Simic <dsimic@...jaro.org>
Cc: linux-rockchip@...ts.infradead.org,
	heiko@...ech.de,
	tglx@...utronix.de,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	FUKAUMI Naoki <naoki@...xa.com>
Subject: Re: [PATCH 1/2] arm64: dts: rockchip: Use "dma-noncoherent" in base RK3588 SoC dtsi

On Fri, 27 Dec 2024 15:42:23 +0000,
Dragan Simic <dsimic@...jaro.org> wrote:
> 
> The preferred way to denote hardware with non-coherent DMA is to use the
> "dma-noncoherent" DT property, at both the GIC redistributor and the GIC ITS
> levels, [1] instead of relying on the compatibles to handle hardware errata,
> in this case the Rockchip 3588001 errata. [2]
> 
> Let's have the preferred way employed in the base Rockchip RK3588 SoC dtsi,
> which also goes along with adding initial support for the Rockchip RK3582 SoC
> variant, with its separate compatible. [2][3]
> 
> [1] Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.yaml
> [2] https://lore.kernel.org/linux-rockchip/86msgoozqa.wl-maz@kernel.org/
> [3] https://lore.kernel.org/linux-rockchip/20241222030355.2246-4-naoki@radxa.com/
> 
> Cc: Marc Zyngier <maz@...nel.org>
> Cc: FUKAUMI Naoki <naoki@...xa.com>
> Signed-off-by: Dragan Simic <dsimic@...jaro.org>

Acked-by: Marc Zyngier <maz@...nel.org>

	M.

-- 
Without deviation from the norm, progress is not possible.