linux-kernel - [PATCH] drm/bridge: Mark the of_node of the aux bridge device as reused

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Message-Id: <20241017-drm-aux-bridge-mark-of-node-reused-v1-1-7cd5702bb4f2@linaro.org>
Date: Thu, 17 Oct 2024 18:35:26 +0300
From: Abel Vesa <abel.vesa@...aro.org>
To: Andrzej Hajda <andrzej.hajda@...el.com>, 
 Neil Armstrong <neil.armstrong@...aro.org>, Robert Foss <rfoss@...nel.org>, 
 Laurent Pinchart <Laurent.pinchart@...asonboard.com>, 
 Jonas Karlman <jonas@...boo.se>, Jernej Skrabec <jernej.skrabec@...il.com>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>
Cc: Johan Hovold <johan@...nel.org>, 
 Dmitry Baryshkov <dmitry.baryshkov@...aro.org>, 
 dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
 Abel Vesa <abel.vesa@...aro.org>
Subject: [PATCH] drm/bridge: Mark the of_node of the aux bridge device as
 reused

There are some cases where sharing the of_node renders different resources
providers confused about the same resource being shared by two different
devices. Avoid that by marking the of_node as reused since the aux bridge
device is reusing the parent of_node.

Signed-off-by: Abel Vesa <abel.vesa@...aro.org>
---
 drivers/gpu/drm/bridge/aux-bridge.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/bridge/aux-bridge.c b/drivers/gpu/drm/bridge/aux-bridge.c
index b29980f95379ec7af873ed6e0fb79a9abb663c7b..ec3299ae49d6abdb75ee98acfe0682f1acc459f8 100644
--- a/drivers/gpu/drm/bridge/aux-bridge.c
+++ b/drivers/gpu/drm/bridge/aux-bridge.c
@@ -60,6 +60,7 @@ int drm_aux_bridge_register(struct device *parent)
 	adev->dev.parent = parent;
 	adev->dev.of_node = of_node_get(parent->of_node);
 	adev->dev.release = drm_aux_bridge_release;
+	adev->dev.of_node_reused = true;
 
 	ret = auxiliary_device_init(adev);
 	if (ret) {

---
base-commit: d61a00525464bfc5fe92c6ad713350988e492b88
change-id: 20241017-drm-aux-bridge-mark-of-node-reused-5c2ee740ff19

Best regards,
-- 
Abel Vesa <abel.vesa@...aro.org>