Message-ID: <1480942241.18661.10.camel@mtksdaap41>
Subject: Re: [PATCH v10 02/13] drm/mediatek: add *driver_data for different
 hardware settings
From: YT Shen <yt.shen@mediatek.com>
To: Daniel Kurtz <djkurtz@chromium.org>
CC: dri-devel <dri-devel@lists.freedesktop.org>,
        Philipp Zabel <p.zabel@pengutronix.de>,
        David Airlie <airlied@linux.ie>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        Mao Huang <littlecvr@chromium.org>, CK Hu <ck.hu@mediatek.com>,
        Bibby Hsieh <bibby.hsieh@mediatek.com>,
        Daniel Vetter <daniel.vetter@ffwll.ch>,
        Thierry Reding <thierry.reding@gmail.com>,
        "Jie Qiu" <jie.qiu@mediatek.com>,
        Maxime Ripard <maxime.ripard@free-electrons.com>,
        Chris Wilson <chris@chris-wilson.co.uk>,
        shaoming chen <shaoming.chen@mediatek.com>,
        Jitao Shi <jitao.shi@mediatek.com>,
        Boris Brezillon <boris.brezillon@free-electrons.com>,
        Dan Carpenter <dan.carpenter@oracle.com>,
        "linux-arm-kernel@lists.infradead.org" 
        <linux-arm-kernel@lists.infradead.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@lists.infradead.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        srv_heupstream <srv_heupstream@mediatek.com>,
        Sascha Hauer <kernel@pengutronix.de>,
        Yingjoe Chen =?UTF-8?Q?=28=E9=99=B3=E8=8B=B1=E6=B4=B2=29?= 
        <yingjoe.chen@mediatek.com>,
        Emil Velikov <emil.l.velikov@gmail.com>
Date: Mon, 5 Dec 2016 20:50:41 +0800
In-Reply-To: <CAGS+omDmMq7AEnyDzo4Oih_f+g4DE1Jz6xiV=+_3JGtSAfd+-Q@mail.gmail.com>
References: <1480070076-6196-1-git-send-email-yt.shen@mediatek.com>
         <1480070076-6196-3-git-send-email-yt.shen@mediatek.com>
         <CAGS+omDmMq7AEnyDzo4Oih_f+g4DE1Jz6xiV=+_3JGtSAfd+-Q@mail.gmail.com>
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Hi Daniel,

On Wed, 2016-11-30 at 14:42 +0800, Daniel Kurtz wrote:
> Hi YT,
> 
> 
> On Fri, Nov 25, 2016 at 6:34 PM, YT Shen <yt.shen@mediatek.com> wrote:
> >
> > There are some hardware settings changed, between MT8173 & MT2701:
> > DISP_OVL address offset changed, color format definition changed.
> > DISP_RDMA fifo size changed.
> > DISP_COLOR offset changed.
> > MIPI_TX pll setting changed.
> > And add prefix for mtk_ddp_main & mtk_ddp_ext & mutex_mod.
> 
> Sorry, I have not had time to thoroughly review the new patch set, but
> one quick comment:
> 
> > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > index 22a33ee..cfaa760 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > @@ -78,6 +78,10 @@ struct mtk_ddp_comp_funcs {
> >                           struct drm_crtc_state *state);
> >  };
> >
> > +struct mtk_ddp_comp_driver_data {
> > +       unsigned int color_offset;
> > +};
> > +
> >  struct mtk_ddp_comp {
> >         struct clk *clk;
> >         void __iomem *regs;
> > @@ -85,6 +89,7 @@ struct mtk_ddp_comp {
> >         struct device *larb_dev;
> >         enum mtk_ddp_comp_id id;
> >         const struct mtk_ddp_comp_funcs *funcs;
> > +       const struct mtk_ddp_comp_driver_data *data;
> 
> I want to avoid adding this generic pointer here to all mtk_ddp_comp,
> since this is only used by the color component.
> Instead, define color specific types:
> 
> struct mtk_disp_color_data {
>        unsigned int offset;
> };
> 
> struct mtk_disp_color {
>        struct mtk_ddp_comp             ddp_comp;
>        const struct mtk_disp_color_data *data;
> };
> 
> Then, add another comp_type check and fetch the dev data in
> mtk_drm_probe()  or maybe mtk_ddp_comp_init().
> 
> -Dan
OK, we will remove the color data pointer from generic mtk_ddp_comp.
Thanks.

Regards,
yt.shen