linux-kernel - Re: [PATCH v2 1/1] remoteproc: mediatek: enable cache for mt8186 SCP

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Message-ID: <cff17eda03125c7b144f934ebc633458b09d4d40.camel@mediatek.com>
Date:   Mon, 4 Jul 2022 17:03:12 +0800
From:   Tinghan Shen <tinghan.shen@...iatek.com>
To:     Allen-KH Cheng <allen-kh.cheng@...iatek.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>
CC:     <Project_Global_Chrome_Upstream_Group@...iatek.com>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-remoteproc@...r.kernel.org>,
        Hsin-Yi Wang <hsinyi@...omium.org>
Subject: Re: [PATCH v2 1/1] remoteproc: mediatek: enable cache for mt8186 SCP

On Fri, 2022-07-01 at 20:12 +0800, Allen-KH Cheng wrote:
> This patch is for enableing cache in SCP. There is not enough space
> on the SRAM of SCP. We need to run programs in DRAM. The DRAM power
> and latency is much larger than SRAM, so cache is used to mitigate
> the negative effects for performance. we set SCP registers for cache
> size before loading SCP FW. (8KB+8KB) and also adjust ipi_buf_offset
> in SRAM from 0x7bdb0 to 0x3BDB0 for enableing cache.
> 
> This patch was tested on MediaTek mt8186.
> 
> Signed-off-by: Allen-KH Cheng <allen-kh.cheng@...iatek.com>
> 

Test scp boot and scp ipc ok.

Tested-by: TingHan Shen <tinghan.shen@...iatek.com>