linux-kernel - Re: [PATCH 0/2] arm64: sunxi: a523: Enable Mali GPU

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Message-ID: <20250708004458.15a2feae@minigeek.lan>
Date: Tue, 8 Jul 2025 00:44:58 +0100
From: Andre Przywara <andre.przywara@....com>
To: iuncuim <iuncuim@...il.com>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Chen-Yu Tsai <wens@...e.org>, Jernej
 Skrabec <jernej.skrabec@...il.com>, Samuel Holland <samuel@...lland.org>,
 devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-sunxi@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/2] arm64: sunxi: a523: Enable Mali GPU

On Sun,  6 Jul 2025 10:56:21 +0800
iuncuim <iuncuim@...il.com> wrote:

> From: Mikhail Kalashnikov <iuncuim@...il.com>
> 
> This patch adds gpu support on devices with a523 processor. Since there is
> no support for image output yet, the gpu is disabled after boot up.
> 
> $ dmesg | grep panfrost
> [    3.826968] panfrost 1800000.gpu: clock rate = 432000000
> [    3.832305] panfrost 1800000.gpu: bus_clock rate = 200000000
> [    3.838353] panfrost 1800000.gpu: mali-g57 id 0x9091 major 0x0 minor 0x1
>                status 0x0
> [    3.846050] panfrost 1800000.gpu: features: 00000000,000019f7, issues:
>                00000001,80000400
> [    3.854134] panfrost 1800000.gpu: Features: L2:0x07110206 Shader:0x00000000
>                Tiler:0x00000809 Mem:0x1 MMU:0x00002830 AS:0xff JS:0x7
> [    3.866011] panfrost 1800000.gpu: shader_present=0x1 l2_present=0x1
> [    3.874108] [drm] Initialized panfrost 1.3.0 for 1800000.gpu on minor 0

So what confidence do we have that this really works, apart from these
successful initialisation messages? Has this been shown to work with
some (yet-out-of-tree) DRM patches, to produce 3D rendered output? I
wonder if we should wait with upstreaming until we can really test this
on some kind of screen.

Cheers,
Andre

> 
> Tested on x96qproplus and walnutpi 2b devices.
> 
> Based on v6.16-rc4 with patches:
> https://lore.kernel.org/all/20250628054438.2864220-1-wens@kernel.org
> https://lore.kernel.org/linux-sunxi/20250628161608.3072968-1-wens@kernel.org
> https://lore.kernel.org/linux-sunxi/20250627152918.2606728-1-wens@kernel.org/
> 
> 
> iuncuim (2):
>   arm64: dts: allwinner: a523: add Mali GPU node
>   arm64: dts: allwinner: a523: enable Mali GPU for all boards
> 
>  arch/arm64/boot/dts/allwinner/sun55i-a523.dtsi    | 15 +++++++++++++++
>  .../boot/dts/allwinner/sun55i-a527-cubie-a5e.dts  |  5 +++++
>  .../boot/dts/allwinner/sun55i-h728-x96qpro+.dts   |  5 +++++
>  .../boot/dts/allwinner/sun55i-t527-avaota-a1.dts  |  5 +++++
>  .../dts/allwinner/sun55i-t527-orangepi-4a.dts     |  5 +++++
>  5 files changed, 35 insertions(+)
>