linux-kernel - [PATCH 3/3] media: mtk-mdp: Fix mdp device tree

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Date:   Thu, 13 Apr 2017 15:33:07 +0800
From:   Minghsiu Tsai <minghsiu.tsai@...iatek.com>
To:     Hans Verkuil <hans.verkuil@...co.com>,
        <daniel.thompson@...aro.org>, Rob Herring <robh+dt@...nel.org>,
        Mauro Carvalho Chehab <mchehab@....samsung.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Daniel Kurtz <djkurtz@...omium.org>,
        Pawel Osciak <posciak@...omium.org>,
        Houlong Wei <houlong.wei@...iatek.com>
CC:     <srv_heupstream@...iatek.com>,
        Eddie Huang <eddie.huang@...iatek.com>,
        Yingjoe Chen <yingjoe.chen@...iatek.com>,
        Wu-Cheng Li <wuchengli@...gle.com>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-media@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>,
        Minghsiu Tsai <minghsiu.tsai@...iatek.com>
Subject: [PATCH 3/3] media: mtk-mdp: Fix mdp device tree

From: Daniel Kurtz <djkurtz@...omium.org>

If the mdp_* nodes are under an mdp sub-node, their corresponding
platform device does not automatically get its iommu assigned properly.

Fix this by moving the mdp component nodes up a level such that they are
siblings of mdp and all other SoC subsystems.  This also simplifies the
device tree.

Signed-off-by: Daniel Kurtz <djkurtz@...omium.org>
Signed-off-by: Minghsiu Tsai <minghsiu.tsai@...iatek.com>

---
 drivers/media/platform/mtk-mdp/mtk_mdp_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/platform/mtk-mdp/mtk_mdp_core.c b/drivers/media/platform/mtk-mdp/mtk_mdp_core.c
index 9e4eb7d..a5ad586 100644
--- a/drivers/media/platform/mtk-mdp/mtk_mdp_core.c
+++ b/drivers/media/platform/mtk-mdp/mtk_mdp_core.c
@@ -118,7 +118,7 @@ static int mtk_mdp_probe(struct platform_device *pdev)
 	mutex_init(&mdp->vpulock);
 
 	/* Iterate over sibling MDP function blocks */
-	for_each_child_of_node(dev->of_node, node) {
+	for_each_child_of_node(dev->of_node->parent, node) {
 		const struct of_device_id *of_id;
 		enum mtk_mdp_comp_type comp_type;
 		int comp_id;
-- 
1.9.1