linux-kernel - Re: [PATCH v2 3/4] soc: mediatek: mtk-cmdq: Add cmdq_pkt_poll

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Message-ID: <54d746b5-a27b-4076-98cf-51c887741c68@collabora.com>
Date: Thu, 7 Mar 2024 11:33:07 +0100
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: "Jason-JH.Lin" <jason-jh.lin@...iatek.com>,
 Jassi Brar <jassisinghbrar@...il.com>,
 Chun-Kuang Hu <chunkuang.hu@...nel.org>,
 Matthias Brugger <matthias.bgg@...il.com>
Cc: Jason-ch Chen <jason-ch.chen@...iatek.com>,
 Singo Chang <singo.chang@...iatek.com>, Nancy Lin <nancy.lin@...iatek.com>,
 Shawn Sung <shawn.sung@...iatek.com>, linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org,
 Project_Global_Chrome_Upstream_Group@...iatek.com
Subject: Re: [PATCH v2 3/4] soc: mediatek: mtk-cmdq: Add cmdq_pkt_poll_addr()
 function

Il 07/03/24 02:34, Jason-JH.Lin ha scritto:
> Add cmdq_pkt_poll_addr function to support CMDQ user making
> an instruction for polling a specific address of hardware rigster
> to check the value with or without mask.
> 
> POLL is a legacy operation in GCE, so it does not support SPR and
> CMDQ_CODE_LOGIC. To support polling the register address which doesn't
> have the subsys id, CMDQ users need to make an instruction with GPR and
> CMDQ_CODE_MASK operation to move the register address to be poll into GPR.
> Then users can make an POLL instruction with GPR to poll the register
> address assigned in previous instruction.
> 
> Signed-off-by: Jason-JH.Lin <jason-jh.lin@...iatek.com>

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