linux-kernel - Re: [PATCH v19 03/10] soc: mediatek: add mtk-mmsys support for mt8195 vdosys0

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Date:   Mon, 18 Apr 2022 11:52:48 +0800
From:   Jason-JH Lin <jason-jh.lin@...iatek.com>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        "Rob Herring" <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Chun-Kuang Hu <chunkuang.hu@...nel.org>
CC:     CK Hu <ck.hu@...iatek.com>, Nancy Lin <nancy.lin@...iatek.com>,
        "Singo Chang" <singo.chang@...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>,
        <Project_Global_Chrome_Upstream_Group@...iatek.com>
Subject: Re: [PATCH v19 03/10] soc: mediatek: add mtk-mmsys support for
 mt8195 vdosys0

Hi Angelo,

Thanks for the reviews.

On Fri, 2022-04-15 at 12:18 +0200, AngeloGioacchino Del Regno wrote:
> Il 15/04/22 10:39, jason-jh.lin ha scritto:
> > 1. Add mt8195 mmsys compatible for 2 vdosys.
> > 2. Add io_start into each driver data of mt8195 vdosys.
> > 3. Add get match data function to identify mmsys by io_start.
> > 4. Add mt8195 routing table settings of vdosys0.
> > 
> > Signed-off-by: jason-jh.lin <jason-jh.lin@...iatek.com>
> 
> Unless anyone wants this commit to be split in two, one for the match
> data
> and one for the mt8195 addition, it looks almost good to me, apart
> one small
> change that has to be done, check below:
> 
> 
> > --- >   drivers/soc/mediatek/mt8195-mmsys.h    | 370
> > +++++++++++++++++++++++++
> >   drivers/soc/mediatek/mtk-mmsys.c       | 152 +++++++++-
> >   drivers/soc/mediatek/mtk-mmsys.h       |   6 +
> >   include/linux/soc/mediatek/mtk-mmsys.h |  11 +
> >   4 files changed, 528 insertions(+), 11 deletions(-)
> >   create mode 100644 drivers/soc/mediatek/mt8195-mmsys.h
> > 
> 
> ..snip..
> 
> > diff --git a/drivers/soc/mediatek/mtk-mmsys.h
> > b/drivers/soc/mediatek/mtk-mmsys.h
> > index 77f37f8c715b..21cf300ba864 100644
> > --- a/drivers/soc/mediatek/mtk-mmsys.h
> > +++ b/drivers/soc/mediatek/mtk-mmsys.h
> > @@ -87,12 +87,18 @@ struct mtk_mmsys_routes {
> >   };
> >   
> >   struct mtk_mmsys_driver_data {
> > +	const u32 io_start;
> 
> I agree with you that this iostart is in 32bits boundaries, and that
> this will
> practically never change... and I was in doubt whether this would be
> acceptable
> or not, because of saving some memory.
> 
> Even though I would really love to have the savings, in order to
> avoid having any
> "surprises" in the future (any future breakage for "reasons"), we
> shall comply
> with the kernel types, so, this has to be...
> 
> 	const resource_size_t io_start;
> 
> ...and this is the same for both this file and mtk_drm_drv.h, which
> you modify in
> patch 07/10.
> 
> After fixing that:
> 
> Reviewed-by: AngeloGioacchino Del Regno <
> angelogioacchino.delregno@...labora.com>
> 
> 
> Cheers,
> Angelo

OK, I'll fix them in the next version.
Thanks.

Regards,
Jason-JH.Lin
-- 
Jason-JH Lin <jason-jh.lin@...iatek.com>