linux-kernel - [PATCH 2/2] drm/imx: parallel-display: add the bridge before attaching it

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Message-Id: <20251014-drm-bridge-alloc-imx-ipuv3-v1-2-a1bb1dcbff50@bootlin.com>
Date: Tue, 14 Oct 2025 13:30:52 +0200
From: Luca Ceresoli <luca.ceresoli@...tlin.com>
To: Ernest Van Hoecke <ernestvanhoecke@...il.com>, 
 Philipp Zabel <p.zabel@...gutronix.de>, 
 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>, 
 Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>
Cc: Hui Pu <Hui.Pu@...ealthcare.com>, 
 Thomas Petazzoni <thomas.petazzoni@...tlin.com>, 
 dri-devel@...ts.freedesktop.org, imx@...ts.linux.dev, 
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Luca Ceresoli <luca.ceresoli@...tlin.com>
Subject: [PATCH 2/2] drm/imx: parallel-display: add the bridge before
 attaching it

Invoking drm_bridge_add() is good practice, so add it to this driver.

Link: https://lore.kernel.org/all/DDHZ5GO9MPF0.CGYTVBI74FOZ@bootlin.com
Signed-off-by: Luca Ceresoli <luca.ceresoli@...tlin.com>

---

Note: there is a proposal to make drm_bridge_add() mandatory before
drm_bridge_attach():
https://lore.kernel.org/lkml/20251003-b4-drm-bridge-alloc-add-before-attach-v1-3-92fb40d27704@bootlin.com/
---
 drivers/gpu/drm/imx/ipuv3/parallel-display.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/imx/ipuv3/parallel-display.c b/drivers/gpu/drm/imx/ipuv3/parallel-display.c
index 3d0de9c6e925978b7532b6d13caf6909cc343dd7..7fc6af7033078eef6be0672ff0d1c7bddda88ba1 100644
--- a/drivers/gpu/drm/imx/ipuv3/parallel-display.c
+++ b/drivers/gpu/drm/imx/ipuv3/parallel-display.c
@@ -256,6 +256,8 @@ static int imx_pd_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, imxpd);
 
+	devm_drm_bridge_add(dev, &imxpd->bridge);
+
 	return component_add(dev, &imx_pd_ops);
 }
 

-- 
2.51.0