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drm/mediatek: clear IRQ status before enable OVL interrupt

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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@mediatek.com>
Acked-by: CK Hu <ck.hu@mediatek.com>
This commit is contained in:
Bibby Hsieh 2016-09-29 11:29:49 +08:00 committed by CK Hu
parent f752fff611
commit 56e4b1e183
1 changed files with 1 additions and 0 deletions
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drivers/gpu/drm/mediatek/mtk_disp_ovl.c
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@ -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);
}