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SubjectRe: [PATCH v2 11/15] drm/mediatek: add callback function to return OVL layer number
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Hi, CK:
On Fri, 2018-08-03 at 13:11 +0800, CK Hu wrote:
> Hi, Stu:
>
> On Fri, 2018-08-03 at 11:11 +0800, Stu Hsieh wrote:
> > This patch add callback function to return OVL layer number
> >
> > Signed-off-by: Stu Hsieh <stu.hsieh@mediatek.com>
> > ---
> > drivers/gpu/drm/mediatek/mtk_disp_ovl.c | 10 ++++++++++
> > 1 file changed, 10 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> > index 978782a77629..a42cfa057f42 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> > @@ -58,6 +58,7 @@
> > struct mtk_disp_ovl_data {
> > unsigned int addr;
> > bool fmt_rgb565_is_0;
> > + unsigned int layer_nr;
> > };
> >
> > /**
> > @@ -132,6 +133,13 @@ static void mtk_ovl_config(struct mtk_ddp_comp *comp, unsigned int w,
> > writel(0x0, comp->regs + DISP_REG_OVL_RST);
> > }
> >
> > +static unsigned int mtk_ovl_layer_nr(struct mtk_ddp_comp *comp)
> > +{
> > + struct mtk_disp_ovl *ovl = comp_to_ovl(comp);
> > +
> > + return ovl->data->layer_nr;
>
> For now, MT8173, MT2712, MT2701 OVL all has 4 layer, so you could return
> 4 here. Once a SoC OVL has another layer number, then modified the code
> to this statement.
>
> Regards,
> CK
>
OK

Regards,
Stu

> > +}
> > +
> > static void mtk_ovl_layer_on(struct mtk_ddp_comp *comp, unsigned int idx)
> > {
> > unsigned int reg;
> > @@ -221,6 +229,7 @@ static const struct mtk_ddp_comp_funcs mtk_disp_ovl_funcs = {
> > .stop = mtk_ovl_stop,
> > .enable_vblank = mtk_ovl_enable_vblank,
> > .disable_vblank = mtk_ovl_disable_vblank,
> > + .layer_nr = mtk_ovl_layer_nr,
> > .layer_on = mtk_ovl_layer_on,
> > .layer_off = mtk_ovl_layer_off,
> > .layer_config = mtk_ovl_layer_config,
> > @@ -319,6 +328,7 @@ static const struct mtk_disp_ovl_data mt2701_ovl_driver_data = {
> > static const struct mtk_disp_ovl_data mt8173_ovl_driver_data = {
> > .addr = DISP_REG_OVL_ADDR_MT8173,
> > .fmt_rgb565_is_0 = true,
> > + .layer_nr = 4,
> > };
> >
> > static const struct of_device_id mtk_disp_ovl_driver_dt_match[] = {
>
>


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