Re: [PATCH v10 02/13] drm/mediatek: add *driver_data for different hardware settings

[YT Shen]

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@xxxxxxxxxxxx> 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