linux-kernel - [PATCH 9/9] drm/imx: parallel-display: put the bridge returned by drm_bridge_get_next

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Message-Id: <20250709-drm-bridge-alloc-getput-drm_bridge_get_next_bridge-v1-9-48920b9cf369@bootlin.com>
Date: Wed, 09 Jul 2025 18:48:08 +0200
From: Luca Ceresoli <luca.ceresoli@...tlin.com>
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>, 
 Liu Ying <victor.liu@....com>, Shawn Guo <shawnguo@...nel.org>, 
 Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>, 
 Tomi Valkeinen <tomi.valkeinen@...asonboard.com>, 
 Philipp Zabel <p.zabel@...gutronix.de>
Cc: Hui Pu <Hui.Pu@...ealthcare.com>, 
 Thomas Petazzoni <thomas.petazzoni@...tlin.com>, 
 linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org, 
 imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org, 
 Luca Ceresoli <luca.ceresoli@...tlin.com>
Subject: [PATCH 9/9] drm/imx: parallel-display: put the bridge returned by
 drm_bridge_get_next_bridge()

The bridge returned by drm_bridge_get_next_bridge() is refcounted. Put it
when done.

Signed-off-by: Luca Ceresoli <luca.ceresoli@...tlin.com>
---
 drivers/gpu/drm/imx/ipuv3/parallel-display.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/imx/ipuv3/parallel-display.c b/drivers/gpu/drm/imx/ipuv3/parallel-display.c
index 6d8325c766979aa3ba98970f00806e99c139d3c3..44b2ce3c2a3a1641c4483a610607555dfbedff9e 100644
--- a/drivers/gpu/drm/imx/ipuv3/parallel-display.c
+++ b/drivers/gpu/drm/imx/ipuv3/parallel-display.c
@@ -138,9 +138,11 @@ static int imx_pd_bridge_atomic_check(struct drm_bridge *bridge,
 	u32 bus_flags, bus_fmt;
 
 	next_bridge = drm_bridge_get_next_bridge(bridge);
-	if (next_bridge)
+	if (next_bridge) {
 		next_bridge_state = drm_atomic_get_new_bridge_state(crtc_state->state,
 								    next_bridge);
+		drm_bridge_put(next_bridge);
+	}
 
 	if (next_bridge_state)
 		bus_flags = next_bridge_state->input_bus_cfg.flags;

-- 
2.50.0