linux-kernel - Re: [PATCH] remoteproc: mediatek: Increase MT8188 SCP core0 DRAM size

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Date: Mon, 10 Jun 2024 10:34:16 -0600
From: Mathieu Poirier <mathieu.poirier@...aro.org>
To: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Cc: jason-ch chen <jason-ch.chen@...iatek.corp-partner.google.com>,
	Bjorn Andersson <andersson@...nel.org>,
	Matthias Brugger <matthias.bgg@...il.com>,
	Project_Global_Chrome_Upstream_Group@...iatek.com,
	linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org,
	Jason Chen <Jason-ch.Chen@...iatek.com>
Subject: Re: [PATCH] remoteproc: mediatek: Increase MT8188 SCP core0 DRAM size

On Thu, Jun 06, 2024 at 01:00:11PM +0200, AngeloGioacchino Del Regno wrote:
> Il 06/06/24 11:06, jason-ch chen ha scritto:
> > From: Jason Chen <Jason-ch.Chen@...iatek.com>
> > 
> > Increase MT8188 SCP core0 DRAM size for HEVC driver.

This is telling me _what_ gets done rather than _why_ it gets done.

> > 
> 
> ....so the second core only gets a maximum of 0x200000 of SRAM?
> I'm not sure how useful is the secondary SCP core, at this point, with so little
> available SRAM but... okay, as you wish.
> 
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> 
> 
> > Signed-off-by: Jason Chen <Jason-ch.Chen@...iatek.com>
> > ---
> >   drivers/remoteproc/mtk_scp.c | 2 +-
> >   1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
> > index b885a9a041e4..2119fc62c3f2 100644
> > --- a/drivers/remoteproc/mtk_scp.c
> > +++ b/drivers/remoteproc/mtk_scp.c
> > @@ -1390,7 +1390,7 @@ static const struct mtk_scp_sizes_data default_scp_sizes = {
> >   };
> >   static const struct mtk_scp_sizes_data mt8188_scp_sizes = {
> > -	.max_dram_size = 0x500000,
> > +	.max_dram_size = 0x800000,

Do you require to fix a "reserved-memory" node in a device tree file to account
for this?

Thanks,
Mathieu

> >   	.ipi_share_buffer_size = 600,
> >   };
> 
>