linux-kernel - Re: [PATCH v2] arm64: dts: mediatek: mt8395-genio-1200-evk: Enable GPU

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Message-ID: <01020191e624f788-d1ad3271-81ef-47ec-931a-e638927114a0-000000@eu-west-1.amazonses.com>
Date: Thu, 12 Sep 2024 12:11:08 +0000
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: Pablo Sun <pablo.sun@...iatek.com>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, 
	Conor Dooley <conor+dt@...nel.org>, 
	Matthias Brugger <matthias.bgg@...il.com>
Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-arm-kernel@...ts.infradead.org, 
	linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH v2] arm64: dts: mediatek: mt8395-genio-1200-evk: Enable
 GPU

Il 12/09/24 09:06, Pablo Sun ha scritto:
> Enable the Mali Valhall GPU on Genio 1200 EVK by providing regulator
> supply settingsi to gpu and mfg1, and enable the GPU node.
> 
> In addition, set the GPU related regulator voltage range:
> 
> 1. Set the recommended input voltage range of DVDD_GPU to (0.546V-0.787V),
>     based on Table 5-3 of MT8395 Application Processor Datasheet.
>     The regulator mt6315_7_vbuck1("Vgpu") connects to the DVDD_GPU input.
>     Note that the minimum voltage in SoC eFuse data, which is read by
>     MTK-SVS to adjust the regulator voltage, does not go below
>     the recommended operating voltage in the datasheet.
> 
> 2. Set the input voltage of DVDD_SRAM_GPU, supplied by
>     mt6359_vsram_others_ldo_reg, to 0.75V, the recommended typical
>     operating voltage in MT8395 Application Processor Datasheet.
> 
> This patch is tested by enabling CONFIG_DRM_PANFROST and
> on Genio 1200 EVK it probed with following dmesg:
> 
> ```
> panfrost 13000000.gpu: clock rate = 700000092
> panfrost 13000000.gpu: mali-g57 id 0x9093 major 0x0 minor 0x1 status 0x0
> panfrost 13000000.gpu: features: 00000000,000019f7,
> 					   issues: 00000001,80000400
> panfrost 13000000.gpu: Features: L2:0x07120206 Shader:0x00000000
> 					   Tiler:0x00000809 Mem:0x301
> 					   MMU:0x00002830 AS:0xff JS:0x7
> panfrost 13000000.gpu: shader_present=0x50045 l2_present=0x1
> [drm] Initialized panfrost 1.2.0 for 13000000.gpu on minor 0
> ```
> 
> Signed-off-by: Pablo Sun <pablo.sun@...iatek.com>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>