Re: [PATCH v1 05/15] remoteproc: mediatek: Add SCP core 1 driver for dual-core scp

[Tinghan Shen]

On Mon, 2022-06-06 at 11:15 +0200, AngeloGioacchino Del Regno wrote:
> Il 01/06/22 13:21, Tinghan Shen ha scritto:
> > MT8195 SCP is a dual-core processor. The mtk_scp.c driver only controls
> > SCP core 0. This patch adds a basic driver to control the another core.
> > 
> > Core 1 and core 0 of the SCP are housed in the same subsys.They see
> > registers and memory in the same way.
> > 
> > Core 1 of the SCP features its own set of core configuration registers,
> > interrupt controller, timers, and DMAs. The rest of the peripherals
> > in this subsystem are shared by core 0 and core 1.
> > 
> > As for memory, core 1 has its own cache memory, and the SCP SRAM is shared
> > by core 0 and core 1.
> > 
> 
> Hello Tinghan,
> 
> checking all the patches that are introducing support for the secondary SCP core,
> it's clear that you're practically reusing *most of* mtk_scp in mtk_scp_dual.
> 
> I don't think that adding a new configuration option for MTK_SCP_DUALCORE (nor a
> new file just for that) is a good idea... the code is "short enough" so you should
> really just add support for multi-core SCP in mtk_scp.c instead.
> 
> After doing so, I have a hunch that we'll be able to reduce the size of this
> implementation even more, as I see literally too much common code :-)
> 

Hi Angelo,

Thanks for your review.

This series has 2 new files, mtk_scp_dual.c and mtk_scp_subdev.c.
Is your advice to merge both files into mtk_scp.c, 
or to merely merge mtk_scp_dual.c to mtk_scp.c?

Thanks,
TingHan