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Date: Wed, 23 Dec 2020 09:23:49 +0800 From: Yongqiang Niu <yongqiang.niu@...iatek.com> To: Nicolas Boichat <drinkcat@...omium.org> CC: CK Hu <ck.hu@...iatek.com>, Philipp Zabel <p.zabel@...gutronix.de>, "Rob Herring" <robh+dt@...nel.org>, Matthias Brugger <matthias.bgg@...il.com>, Mark Rutland <mark.rutland@....com>, Devicetree List <devicetree@...r.kernel.org>, David Airlie <airlied@...ux.ie>, lkml <linux-kernel@...r.kernel.org>, dri-devel <dri-devel@...ts.freedesktop.org>, "moderated list:ARM/Mediatek SoC support" <linux-mediatek@...ts.infradead.org>, Daniel Vetter <daniel@...ll.ch>, linux-arm Mailing List <linux-arm-kernel@...ts.infradead.org> Subject: Re: [PATCH v2, 07/17] drm/mediatek: add disp config and mm 26mhz clock into mutex device 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@...iatek.com> 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@...iatek.com> > > --- > > 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@...ts.infradead.org > > http://lists.infradead.org/mailman/listinfo/linux-mediatek
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