[PATCH 1/3] drm: display: Set fwnode for aux bus devices

From: Saravana Kannan <saravanak@google.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	"Rafael J. Wysocki" <rafael@kernel.org>,
	 Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
	Maxime Ripard <mripard@kernel.org>,
	 Thomas Zimmermann <tzimmermann@suse.de>,
	David Airlie <airlied@gmail.com>, Simona Vetter <simona@ffwll.ch>,
	 JC Kuo <jckuo@nvidia.com>, Vinod Koul <vkoul@kernel.org>,
	 Kishon Vijay Abraham I <kishon@kernel.org>,
	Thierry Reding <thierry.reding@gmail.com>,
	 Jonathan Hunter <jonathanh@nvidia.com>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	 AngeloGioacchino Del Regno
	<angelogioacchino.delregno@collabora.com>
Cc: "Saravana Kannan" <saravanak@google.com>,
	"Nícolas F. R. A. Prado" <nfraprado@collabora.com>,
	kernel-team@android.com, linux-kernel@vger.kernel.org,
	dri-devel@lists.freedesktop.org, linux-phy@lists.infradead.org,
	linux-tegra@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-mediatek@lists.infradead.org
Subject: [PATCH 1/3] drm: display: Set fwnode for aux bus devices
Date: Wed, 23 Oct 2024 23:13:42 -0700	[thread overview]
Message-ID: <20241024061347.1771063-2-saravanak@google.com> (raw)
In-Reply-To: <20241024061347.1771063-1-saravanak@google.com>

fwnode needs to be set for a device for fw_devlink to be able to
track/enforce its dependencies correctly. Without this, you'll see error
messages like this when the supplier has probed and tries to make sure
all its fwnode consumers are linked to it using device links:

mediatek-drm-dp 1c500000.edp-tx: Failed to create device link (0x180) with backlight-lcd0

Reported-by: "Nícolas F. R. A. Prado" <nfraprado@collabora.com>
Closes: https://lore.kernel.org/all/7b995947-4540-4b17-872e-e107adca4598@notapiano/
Tested-by: "Nícolas F. R. A. Prado" <nfraprado@collabora.com>
Signed-off-by: Saravana Kannan <saravanak@google.com>
---
 drivers/gpu/drm/display/drm_dp_aux_bus.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/display/drm_dp_aux_bus.c b/drivers/gpu/drm/display/drm_dp_aux_bus.c
index d810529ebfb6..ec7eac6b595f 100644
--- a/drivers/gpu/drm/display/drm_dp_aux_bus.c
+++ b/drivers/gpu/drm/display/drm_dp_aux_bus.c
@@ -292,7 +292,7 @@ int of_dp_aux_populate_bus(struct drm_dp_aux *aux,
 	aux_ep->dev.parent = aux->dev;
 	aux_ep->dev.bus = &dp_aux_bus_type;
 	aux_ep->dev.type = &dp_aux_device_type_type;
-	aux_ep->dev.of_node = of_node_get(np);
+	device_set_node(&aux_ep->dev, of_fwnode_handle(of_node_get(np)));
 	dev_set_name(&aux_ep->dev, "aux-%s", dev_name(aux->dev));
 
 	ret = device_register(&aux_ep->dev);
-- 
2.47.0.105.g07ac214952-goog


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