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c=relaxed/relaxed; d=airkyi.com; s=altu2504; t=1792481342; bh=DJanm14+a4oEERJIEwsqr6UMMmk0UfftGh/0a/Q8LT4=; h=From:To:Subject:Date:Message-Id; b=tzk2/1RXw/VHXRLFAH+ArQkWpRnFzPepo/f+iGWP/Hk2Hz+c2rAvS7BH5c2q/ex3R v9PQqx+e4tC/UoCPz4MnIG/PgoLi8DgL+E9+edhj3x4JrFg0WA7Jmtdey7OZiOoGup ffUNcJxnoPa4g2ZqrnogivUWaOH4wYZQJwZWNngk= X-QQ-mid: zesmtpsz4t1792481341t855129f9 X-QQ-Originating-IP: i939nXwO2ei7d/m1loVbZw6nbt7HmJycrjDREFVFMnQ= Received: from DESKTOP-8BT1A2O.localdomain ( [61.154.14.86]) by bizesmtp.qq.com (ESMTP) with id ; Tue, 20 Oct 2026 15:28:56 +0800 (CST) X-QQ-SSF: 0000000000000000000000000000000 X-QQ-GoodBg: 0 X-BIZMAIL-ID: 14835207740460632704 From: Chaoyi Chen To: Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Luca Ceresoli , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Sandy Huang , =?UTF-8?q?Heiko=20St=C3=BCbner?= , Andy Yan , Vinod Koul , Sebastian Reichel , Nicolas Frattaroli , Heikki Krogerus Cc: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-phy@lists.infradead.org, Chaoyi Chen Subject: [PATCH v8 4/7] drm/bridge: aux: Add drm_aux_bridge_register_from_node() Date: Tue, 20 Oct 2026 15:28:13 +0800 Message-Id: <20261020072816.180-5-kernel@airkyi.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20261020072816.180-1-kernel@airkyi.com> References: <20261020072816.180-1-kernel@airkyi.com> X-QQ-SENDSIZE: 520 Feedback-ID: zesmtpsz:airkyi.com:qybglogicsvrgz:qybglogicsvrgz6b-0 X-QQ-XMAILINFO: OZZSS56D9fAj5yWqEuc+hgEWM7o1VuiGY+B36f30Che9ZzBQLzgTH8/B LWj/Qu4nfhf9Y3cPXOJVIUBOM7Fvh+E9TuDYnt4ThIZ/y4p/eZEXkxF6x/mVkaguvOcgQTE VAzgst51Y83koSRR3yuzVbrIP7+WeO/bYs+hgL4ZYwufun3v+MGiKZ4xFREQKIGBW30f8Pi SMycmj425q8n1uXdy9/nCIPIM6tPRQkov9jUKgSNm95e1OxkSj0cOyyvXwxSpcZc4QHm9yO YPJn5aHj0Bawjc7Ws+7WnWjSP/j0eh0q+bdAGTw/5cm/asHehItD9B3jgfEJl5fBhR1cW/O tJ4b2641NHQMy3+2y0kf2wxxmS8nVIJ0ulGRT3XSfFSoAn2mwczN1mfUKbNlQV5BaYjNqyB wkUcnBn3vHNdqP9vvVty+mbzPwKxCb/CsDiOcRL+w+lbeL7lrIXyiaODMggJamYJLRo6NcW bHbrtrjBEXcfoGOLflJN7rdovmCPldYZEVcNTrJ3H4y3AGshYnB9svQH2XocIJoUWv5daMC Udjyx+apBbYlTvW0VyDIlvCSwjKIghqw3NV6LjXjBsSb7qAndDSIxNdYVCFU2Kl/A9DKbV9 ULa3NXwmBapVB3wtaSOxK4ipbpUcxpxGQLKyCMiSIqxzNtIXHmYImEl4mMxLVEQfuc3qok6 iiSOCTBsoWqfmiwyQRIBz7cKm57nlQwjk7zr7w4/79S5+O8iaFBPnVl1tDqcKNc+gpVpyHb ilOLHhzfhEw5vSrGiPPTPb1FOa0EBxtDruYD1X+IgELf+UZhz80NGWCC+qguH805CjAiQaO JZo19okUeWlA/cAeowANjRYVZ00HXcJR1oOFIvUgtMB8YcrJvWw73F5Zo4nrzdhM1hBp+fQ 3Ttvqa9ZNZw3PToNVVijaAi6Qbb5r5AfUHwFInb+2l/GAKXUlZ030jK8wWT5A721od0zJEN 8T+eGmNUPtdkCicWCbKLH53QlBWSP2FQ1kqoAHr2S6jukg5l2AYZX6O/Pl0SG8mXyYLHaVv Lk+fyN1xBQ+EdyC0YfmQOQtLs4+0/zdsVr4AFm9Q== X-QQ-XMRINFO: NS+P29fieYNwqS3WCnRCOn9D1NpZuCnCRA== X-QQ-RECHKSPAM: 0 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list From: Chaoyi Chen The drm_aux_bridge_register() uses the device->of_node as the bridge->of_node. This patch adds drm_aux_bridge_register_from_node() to allow specifying the of_node corresponding to the bridge. Signed-off-by: Chaoyi Chen Reviewed-by: Neil Armstrong Reviewed-by: Nicolas Frattaroli Reviewed-by: Sebastian Reichel --- (no changes since v3) Changes in v2: - Fix incorrect function names in the documentation comments. --- drivers/gpu/drm/bridge/aux-bridge.c | 26 +++++++++++++++++++++++--- include/drm/bridge/aux-bridge.h | 6 ++++++ 2 files changed, 29 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/bridge/aux-bridge.c b/drivers/gpu/drm/bridge/aux-bridge.c index 169939d23310..2b48612d6d1b 100644 --- a/drivers/gpu/drm/bridge/aux-bridge.c +++ b/drivers/gpu/drm/bridge/aux-bridge.c @@ -34,8 +34,9 @@ static void drm_aux_bridge_unregister_adev(void *_adev) } /** - * drm_aux_bridge_register - Create a simple bridge device to link the chain + * drm_aux_bridge_register_from_node - Create a simple bridge device to link the chain * @parent: device instance providing this bridge + * @np: device node pointer corresponding to this bridge instance * * Creates a simple DRM bridge that doesn't implement any drm_bridge * operations. Such bridges merely fill a place in the bridge chain linking @@ -43,7 +44,7 @@ static void drm_aux_bridge_unregister_adev(void *_adev) * * Return: zero on success, negative error code on failure */ -int drm_aux_bridge_register(struct device *parent) +int drm_aux_bridge_register_from_node(struct device *parent, struct device_node *np) { struct auxiliary_device *adev; int ret; @@ -63,7 +64,10 @@ int drm_aux_bridge_register(struct device *parent) adev->dev.parent = parent; adev->dev.release = drm_aux_bridge_release; - device_set_of_node_from_dev(&adev->dev, parent); + if (np) + device_set_node(&adev->dev, of_fwnode_handle(np)); + else + device_set_of_node_from_dev(&adev->dev, parent); ret = auxiliary_device_init(adev); if (ret) { @@ -81,6 +85,22 @@ int drm_aux_bridge_register(struct device *parent) return devm_add_action_or_reset(parent, drm_aux_bridge_unregister_adev, adev); } +EXPORT_SYMBOL_GPL(drm_aux_bridge_register_from_node); + +/** + * drm_aux_bridge_register - Create a simple bridge device to link the chain + * @parent: device instance providing this bridge + * + * Creates a simple DRM bridge that doesn't implement any drm_bridge + * operations. Such bridges merely fill a place in the bridge chain linking + * surrounding DRM bridges. + * + * Return: zero on success, negative error code on failure + */ +int drm_aux_bridge_register(struct device *parent) +{ + return drm_aux_bridge_register_from_node(parent, NULL); +} EXPORT_SYMBOL_GPL(drm_aux_bridge_register); struct drm_aux_bridge_data { diff --git a/include/drm/bridge/aux-bridge.h b/include/drm/bridge/aux-bridge.h index cca07a8e2d45..67f74ed287d9 100644 --- a/include/drm/bridge/aux-bridge.h +++ b/include/drm/bridge/aux-bridge.h @@ -13,11 +13,17 @@ struct auxiliary_device; #if IS_ENABLED(CONFIG_DRM_AUX_BRIDGE) int drm_aux_bridge_register(struct device *parent); +int drm_aux_bridge_register_from_node(struct device *parent, struct device_node *np); #else static inline int drm_aux_bridge_register(struct device *parent) { return 0; } + +static inline int drm_aux_bridge_register_from_node(struct device *parent, struct device_node *np) +{ + return 0; +} #endif #if IS_ENABLED(CONFIG_DRM_AUX_HPD_BRIDGE) -- 2.53.0