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From:   Stu Hsieh <stu.hsieh@mediatek.com>
To:     CK Hu <ck.hu@mediatek.com>, Philipp Zabel <p.zabel@pengutronix.de>
CC:     David Airlie <airlied@linux.ie>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        <dri-devel@lists.freedesktop.org>,
        <linux-arm-kernel@lists.infradead.org>,
        <linux-mediatek@lists.infradead.org>,
        <linux-kernel@vger.kernel.org>, <srv_heupstream@mediatek.com>,
        Stu Hsieh <stu.hsieh@mediatek.com>
Subject: [PATCH v4 09/14] drm/mediatek: add function to get layer number for component
Date:   Thu, 9 Aug 2018 10:15:44 +0800
Message-ID: <1533780949-30141-10-git-send-email-stu.hsieh@mediatek.com>
In-Reply-To: <1533780949-30141-1-git-send-email-stu.hsieh@mediatek.com>
References: <1533780949-30141-1-git-send-email-stu.hsieh@mediatek.com>
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This patch add function to get layer number for component

Signed-off-by: Stu Hsieh <stu.hsieh@mediatek.com>
Reviewed-by: CK Hu <ck.hu@mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
index 7413ffeb3c9d..8399229e6ad2 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
@@ -78,6 +78,7 @@ struct mtk_ddp_comp_funcs {
 	void (*stop)(struct mtk_ddp_comp *comp);
 	void (*enable_vblank)(struct mtk_ddp_comp *comp, struct drm_crtc *crtc);
 	void (*disable_vblank)(struct mtk_ddp_comp *comp);
+	unsigned int (*layer_nr)(struct mtk_ddp_comp *comp);
 	void (*layer_on)(struct mtk_ddp_comp *comp, unsigned int idx);
 	void (*layer_off)(struct mtk_ddp_comp *comp, unsigned int idx);
 	void (*layer_config)(struct mtk_ddp_comp *comp, unsigned int idx,
@@ -128,6 +129,14 @@ static inline void mtk_ddp_comp_disable_vblank(struct mtk_ddp_comp *comp)
 		comp->funcs->disable_vblank(comp);
 }
 
+static inline unsigned int mtk_ddp_comp_layer_nr(struct mtk_ddp_comp *comp)
+{
+	if (comp->funcs && comp->funcs->layer_nr)
+		return comp->funcs->layer_nr(comp);
+
+	return 0;
+}
+
 static inline void mtk_ddp_comp_layer_on(struct mtk_ddp_comp *comp,
 					 unsigned int idx)
 {
-- 
2.12.5.2.gbdf23ab