On Tue, 2020-12-15 at 21:37 +0800, Nicolas Boichat wrote:
> On Sat, Dec 12, 2020 at 12:12 PM Yongqiang Niu
> <yongqiang.niu@xxxxxxxxxxxx> wrote:
> >
> > there are 2 more clock need enable for display.
> > parser these clock when mutex device probe,
> > enable and disable when mutex on/off
> >
> > Signed-off-by: Yongqiang Niu <yongqiang.niu@xxxxxxxxxxxx>
> > ---
> > drivers/gpu/drm/mediatek/mtk_drm_ddp.c | 49 ++++++++++++++++++++++++++++------
> > 1 file changed, 41 insertions(+), 8 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp.c
> > index 60788c1..de618a1 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp.c
> > @@ -118,7 +118,7 @@ struct mtk_ddp_data {
> >
> > struct mtk_ddp {
> > struct device *dev;
> > - struct clk *clk;
> > + struct clk *clk[3];
> > void __iomem *regs;
> > struct mtk_disp_mutex mutex[10];
> > const struct mtk_ddp_data *data;
> > @@ -257,14 +257,39 @@ int mtk_disp_mutex_prepare(struct mtk_disp_mutex *mutex)
> > {
> > struct mtk_ddp *ddp = container_of(mutex, struct mtk_ddp,
> > mutex[mutex->id]);
> > - return clk_prepare_enable(ddp->clk);
> > + int ret;
> > + int i;
> > +
> > + for (i = 0; i < ARRAY_SIZE(ddp->clk); i++) {
> > + if (IS_ERR(ddp->clk[i]))
> > + continue;
> > + ret = clk_prepare_enable(ddp->clk[i]);
> > + if (ret) {
> > + pr_err("failed to enable clock, err %d. i:%d\n",
> > + ret, i);
> > + goto err;
> > + }
> > + }
> > +
> > + return 0;
> > +
> > +err:
> > + while (--i >= 0)
> > + clk_disable_unprepare(ddp->clk[i]);
> > + return ret;
> > }
> >
> > void mtk_disp_mutex_unprepare(struct mtk_disp_mutex *mutex)
> > {
> > struct mtk_ddp *ddp = container_of(mutex, struct mtk_ddp,
> > mutex[mutex->id]);
> > - clk_disable_unprepare(ddp->clk);
> > + int i;
> > +
> > + for (i = 0; i < ARRAY_SIZE(ddp->clk); i++) {
> > + if (IS_ERR(ddp->clk[i]))
> > + continue;
> > + clk_disable_unprepare(ddp->clk[i]);
> > + }
> > }
> >
> > void mtk_disp_mutex_add_comp(struct mtk_disp_mutex *mutex,
> > @@ -415,11 +440,19 @@ static int mtk_ddp_probe(struct platform_device *pdev)
> > ddp->data = of_device_get_match_data(dev);
> >
> > if (!ddp->data->no_clk) {
> > - ddp->clk = devm_clk_get(dev, NULL);
> > - if (IS_ERR(ddp->clk)) {
> > - if (PTR_ERR(ddp->clk) != -EPROBE_DEFER)
> > - dev_err(dev, "Failed to get clock\n");
> > - return PTR_ERR(ddp->clk);
> > + int ret;
> > +
> > + for (i = 0; i < ARRAY_SIZE(ddp->clk); i++) {
> > + ddp->clk[i] = of_clk_get(dev->of_node, i);
> > +
> > + if (IS_ERR(ddp->clk[i])) {
> > + ret = PTR_ERR(ddp->clk[i]);
> > + if (ret != EPROBE_DEFER)
> > + dev_err(dev, "Failed to get clock %d\n",
> > + ret);
> > +
> > + return ret;
> > + }
>
> Use of_clk_bulk_get_all instead?
>
> ddp->num_clks = of_clk_bulk_get_all(dev->of_node, &ddp->clks);
> ...
>
> Then the calls above can be clk_bulk_enable/clk_bulk_disable using
> num_clks and clks.
>
will be fixed in next version
>
> > }
> > }
> >
> > --
> > 1.8.1.1.dirty
> > _______________________________________________
> > Linux-mediatek mailing list
> > Linux-mediatek@xxxxxxxxxxxxxxxxxxx
> > http://lists.infradead.org/mailman/listinfo/linux-mediatek
