linux-kernel - [PATCH v2 05/13] drm/mediatek: dpi use new API for finding bridge

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Message-ID: <20180905083146.14727-6-bibby.hsieh@mediatek.com>
Date:   Wed, 5 Sep 2018 16:31:38 +0800
From:   Bibby Hsieh <bibby.hsieh@...iatek.com>
To:     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>
CC:     Yingjoe Chen <yingjoe.chen@...iatek.com>,
        Cawa Cheng <cawa.cheng@...iatek.com>,
        Daniel Kurtz <djkurtz@...omium.org>,
        Bibby Hsieh <bibby.hsieh@...iatek.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        YT Shen <yt.shen@...iatek.com>,
        Thierry Reding <thierry.reding@...il.com>,
        CK Hu <ck.hu@...iatek.com>, Mao Huang <littlecvr@...omium.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        Sascha Hauer <kernel@...gutronix.de>,
        chunhui dai <chunhui.dai@...iatek.com>
Subject: [PATCH v2 05/13] drm/mediatek: dpi use new API for finding bridge

From: chunhui dai <chunhui.dai@...iatek.com>

Using new API for finding bridge.

Signed-off-by: chunhui dai <chunhui.dai@...iatek.com>
---
 drivers/gpu/drm/mediatek/mtk_dpi.c | 17 +++++++----------
 1 file changed, 7 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
index 3758cfeb586b..ed2c153c70a2 100644
--- a/drivers/gpu/drm/mediatek/mtk_dpi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
@@ -14,6 +14,7 @@
 #include <drm/drmP.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_crtc_helper.h>
+#include <drm/drm_of.h>
 #include <linux/kernel.h>
 #include <linux/component.h>
 #include <linux/platform_device.h>
@@ -708,7 +709,6 @@ static int mtk_dpi_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	struct mtk_dpi *dpi;
 	struct resource *mem;
-	struct device_node *bridge_node;
 	int comp_id;
 	const struct of_device_id *match;
 	int ret;
@@ -758,16 +758,13 @@ static int mtk_dpi_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	bridge_node = of_graph_get_remote_node(dev->of_node, 0, 0);
-	if (!bridge_node)
-		return -ENODEV;
-
-	dev_info(dev, "Found bridge node: %pOF\n", bridge_node);
-
-	dpi->bridge = of_drm_find_bridge(bridge_node);
-	of_node_put(bridge_node);
-	if (!dpi->bridge)
+	ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0,
+					  NULL, &dpi->bridge);
+	if (ret) {
+		dev_err(dev, "Failed to find panel or bridge: %d\n", ret);
 		return -EPROBE_DEFER;
+	}
+	dev_info(dev, "Found bridge node: %pOF\n", dpi->bridge);
 
 	comp_id = mtk_ddp_comp_get_id(dev->of_node, MTK_DPI);
 	if (comp_id < 0) {
-- 
2.12.5.2.gbdf23ab