linux-kernel - [PATCH 1/4] drm/sti: hda: add bridge before attaching

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Message-Id: <20251003-b4-drm-bridge-alloc-add-before-attach-v1-1-92fb40d27704@bootlin.com>
Date: Fri, 03 Oct 2025 10:59:55 +0200
From: Luca Ceresoli <luca.ceresoli@...tlin.com>
To: Alain Volmat <alain.volmat@...s.st.com>, 
 Raphael Gallais-Pou <rgallaispou@...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>, 
 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>
Cc: Hui Pu <Hui.Pu@...ealthcare.com>, 
 Thomas Petazzoni <thomas.petazzoni@...tlin.com>, 
 dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
 Luca Ceresoli <luca.ceresoli@...tlin.com>
Subject: [PATCH 1/4] drm/sti: hda: add bridge before attaching

DRM bridges should be always added to the global bridge list before being
attached.

Link: https://lore.kernel.org/all/20250709-sophisticated-loon-of-rain-6ccdd8@houat/
Signed-off-by: Luca Ceresoli <luca.ceresoli@...tlin.com>
---
 drivers/gpu/drm/sti/sti_hda.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/sti/sti_hda.c b/drivers/gpu/drm/sti/sti_hda.c
index 2c015f563de96ae58959801493ead870c49f70e5..b7397827889c94d6f8e8c2a48b09f06e29ceeaf7 100644
--- a/drivers/gpu/drm/sti/sti_hda.c
+++ b/drivers/gpu/drm/sti/sti_hda.c
@@ -779,6 +779,8 @@ static int sti_hda_probe(struct platform_device *pdev)
 		return PTR_ERR(hda->clk_hddac);
 	}
 
+	drm_bridge_add(&hda->bridge);
+
 	platform_set_drvdata(pdev, hda);
 
 	return component_add(&pdev->dev, &sti_hda_ops);
@@ -786,7 +788,10 @@ static int sti_hda_probe(struct platform_device *pdev)
 
 static void sti_hda_remove(struct platform_device *pdev)
 {
+	struct sti_hda *hda = platform_get_drvdata(pdev);
+
 	component_del(&pdev->dev, &sti_hda_ops);
+	drm_bridge_remove(&hda->bridge);
 }
 
 static const struct of_device_id hda_of_match[] = {

-- 
2.51.0