On Tue, 2020-12-15 at 21:42 +0800, Nicolas Boichat wrote:
> On Sat, Dec 12, 2020 at 12:13 PM Yongqiang Niu
> <yongqiang.niu@xxxxxxxxxxxx> wrote:
> >
> > Use function call for setting mmsys ovl mout register
> >
> > Signed-off-by: Yongqiang Niu <yongqiang.niu@xxxxxxxxxxxx>
> > ---
> > drivers/soc/mediatek/mmsys/mtk-mmsys.c | 18 ++++++++++++++++++
> > include/linux/soc/mediatek/mtk-mmsys.h | 3 +++
> > 2 files changed, 21 insertions(+)
> >
> > diff --git a/drivers/soc/mediatek/mmsys/mtk-mmsys.c b/drivers/soc/mediatek/mmsys/mtk-mmsys.c
> > index cb76e64..2558b42 100644
> > --- a/drivers/soc/mediatek/mmsys/mtk-mmsys.c
> > +++ b/drivers/soc/mediatek/mmsys/mtk-mmsys.c
> > @@ -78,6 +78,15 @@ void mtk_mmsys_ddp_connect(struct device *dev,
> > reg = readl_relaxed(mmsys->regs + addr) | value;
> > writel_relaxed(reg, mmsys->regs + addr);
> > }
> > +
> > + if (!funcs->ovl_mout_en)
> > + return;
> > +
> > + value = funcs->ovl_mout_en(cur, next, &addr);
> > + if (value) {
> > + reg = readl_relaxed(mmsys->regs + addr) | value;
> > + writel_relaxed(reg, mmsys->regs + addr);
> > + }
>
> This is technically correct, but I'm afraid this may become and issue
> later if we have another function like ovl_mout_en.
>
> So maybe it's better to do:
> if (funcs->ovl_mout_en) {
> value = funcs->ovl_mout_en(cur, next, &addr);
> ...
> }
will be improved like this in next version
>
> Or another option: Create a new function
> static unsigned int mtk_mmsys_ovl_mout_en(...) {
> if (!funcs->ovl_mout_en)
> return 0;
> }
>
> and call that, following the same pattern as
> mtk_mmsys_ddp_mout_en/mtk_mmsys_ddp_sel_in?
>
> > }
> > EXPORT_SYMBOL_GPL(mtk_mmsys_ddp_connect);
> >
> > @@ -103,6 +112,15 @@ void mtk_mmsys_ddp_disconnect(struct device *dev,
> > reg = readl_relaxed(mmsys->regs + addr) & ~value;
> > writel_relaxed(reg, mmsys->regs + addr);
> > }
> > +
> > + if (!funcs->ovl_mout_en)
> > + return;
> > +
> > + value = funcs->ovl_mout_en(cur, next, &addr);
> > + if (value) {
> > + reg = readl_relaxed(mmsys->regs + addr) & ~value;
> > + writel_relaxed(reg, mmsys->regs + addr);
> > + }
> > }
> > EXPORT_SYMBOL_GPL(mtk_mmsys_ddp_disconnect);
> >
> > diff --git a/include/linux/soc/mediatek/mtk-mmsys.h b/include/linux/soc/mediatek/mtk-mmsys.h
> > index aa4f60e..220203d 100644
> > --- a/include/linux/soc/mediatek/mtk-mmsys.h
> > +++ b/include/linux/soc/mediatek/mtk-mmsys.h
> > @@ -49,6 +49,9 @@ struct mtk_mmsys_conn_funcs {
> > u32 (*mout_en)(enum mtk_ddp_comp_id cur,
> > enum mtk_ddp_comp_id next,
> > unsigned int *addr);
> > + u32 (*ovl_mout_en)(enum mtk_ddp_comp_id cur,
> > + enum mtk_ddp_comp_id next,
> > + unsigned int *addr);
> > u32 (*sel_in)(enum mtk_ddp_comp_id cur,
> > enum mtk_ddp_comp_id next,
> > unsigned int *addr);
> > --
> > 1.8.1.1.dirty
> > _______________________________________________
> > Linux-mediatek mailing list
> > Linux-mediatek@xxxxxxxxxxxxxxxxxxx
> > http://lists.infradead.org/mailman/listinfo/linux-mediatek
