linux-kernel - Re: [PATCH v4 4/8] soc: mediatek: mtk-cmdq: Add pa_base parsing for unsupported subsys ID hardware

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Message-ID: <581fc075-25d8-4104-a4ee-8c97e1a017e6@collabora.com>
Date: Tue, 4 Mar 2025 10:35:31 +0100
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: Jason-JH Lin <jason-jh.lin@...iatek.com>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Jassi Brar <jassisinghbrar@...il.com>,
 Chun-Kuang Hu <chunkuang.hu@...nel.org>,
 Mauro Carvalho Chehab <mchehab@...nel.org>
Cc: Matthias Brugger <matthias.bgg@...il.com>,
 Nancy Lin <nancy.lin@...iatek.com>, Singo Chang <singo.chang@...iatek.com>,
 Moudy Ho <moudy.ho@...iatek.com>, Xavier Chang <xavier.chang@...iatek.com>,
 Xiandong Wang <xiandong.wang@...iatek.com>,
 Sirius Wang <sirius.wang@...iatek.com>, Fei Shao <fshao@...omium.org>,
 Pin-yen Lin <treapking@...omium.org>,
 Project_Global_Chrome_Upstream_Group@...iatek.com,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 dri-devel@...ts.freedesktop.org, linux-mediatek@...ts.infradead.org,
 linux-arm-kernel@...ts.infradead.org, linux-media@...r.kernel.org
Subject: Re: [PATCH v4 4/8] soc: mediatek: mtk-cmdq: Add pa_base parsing for
 unsupported subsys ID hardware

Il 18/02/25 06:41, Jason-JH Lin ha scritto:
> When GCE executes instructions, the corresponding hardware register
> can be found through the subsys ID. For hardware that does not support
> subsys ID, its subsys ID will be set to invalid value and its physical
> address needs to be used to generate GCE instructions.
> 
> This commit adds a pa_base parsing flow to the cmdq_client_reg structure
> for these unsupported subsys ID hardware.
> 

Does this work only for the MMINFRA located GCEs, or does this work also for
the legacy ones in MT8173/83/88/92/95 // MT6795/6893/etc?

In order to actually review and decide, I do need to know :-)

Thanks,
Angelo