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Message-ID: <1475127473.18843.6.camel@mtksdaap41>
Date: Thu, 29 Sep 2016 13:37:53 +0800
From: CK Hu <ck.hu@...iatek.com>
To: Bibby Hsieh <bibby.hsieh@...iatek.com>
CC: David Airlie <airlied@...ux.ie>,
Matthias Brugger <matthias.bgg@...il.com>,
Daniel Vetter <daniel.vetter@...ll.ch>,
<dri-devel@...ts.freedesktop.org>,
<linux-mediatek@...ts.infradead.org>,
Yingjoe Chen <yingjoe.chen@...iatek.com>,
Cawa Cheng <cawa.cheng@...iatek.com>,
Daniel Kurtz <djkurtz@...omium.org>,
"Philipp Zabel" <p.zabel@...gutronix.de>,
YT Shen <yt.shen@...iatek.com>,
"Thierry Reding" <thierry.reding@...il.com>,
Mao Huang <littlecvr@...omium.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>,
"Sascha Hauer" <kernel@...gutronix.de>
Subject: Re: [PATCH 2/2] drm/mediatek: clear IRQ status before enable OVL
interrupt
Acked-by: CK Hu <ck.hu@...iatek.com>
On Thu, 2016-09-29 at 11:29 +0800, Bibby Hsieh wrote:
> To make sure that the first vblank IRQ after enabling
> vblank isn't too short or immediate, we have to clear
> the IRQ status before enable OVL interrupt.
>
> Signed-off-by: Bibby Hsieh <bibby.hsieh@...iatek.com>
> ---
> drivers/gpu/drm/mediatek/mtk_disp_ovl.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> index 019b7ca..f75c5b5 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> @@ -80,6 +80,7 @@ static void mtk_ovl_enable_vblank(struct mtk_ddp_comp *comp,
> ddp_comp);
>
> priv->crtc = crtc;
> + writel(0x0, comp->regs + DISP_REG_OVL_INTSTA);
> writel_relaxed(OVL_FME_CPL_INT, comp->regs + DISP_REG_OVL_INTEN);
> }
>
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