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Message-Id: <20250326-drm-bridge-refcount-v9-3-5e0661fe1f84@bootlin.com>
Date: Wed, 26 Mar 2025 18:47:37 +0100
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>,
Marek Vasut <marex@...x.de>, Stefan Agner <stefan@...er.ch>,
Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>,
Pengutronix Kernel Team <kernel@...gutronix.de>,
Fabio Estevam <festevam@...il.com>, Inki Dae <inki.dae@...sung.com>,
Jagan Teki <jagan@...rulasolutions.com>,
Marek Szyprowski <m.szyprowski@...sung.com>
Cc: Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
Anusha Srivatsa <asrivats@...hat.com>,
Paul Kocialkowski <paulk@...-base.io>, Dmitry Baryshkov <lumag@...nel.org>,
Hervé Codina <herve.codina@...tlin.com>,
Hui Pu <Hui.Pu@...ealthcare.com>, dri-devel@...ts.freedesktop.org,
linux-kernel@...r.kernel.org, imx@...ts.linux.dev,
linux-arm-kernel@...ts.infradead.org,
Luca Ceresoli <luca.ceresoli@...tlin.com>
Subject: [PATCH v9 3/5] drm/bridge: make devm_drm_bridge_alloc() mandatory
for bridge allocation
All DRM bridges are now supposed to be allocated using
devm_drm_bridge_alloc(), which is cleaner and necessary to support
refcounting.
In the absence of a drm_bridge_init() or such initialization function,
document the new mandatory alloc function on the first DRM bridge core
function that is called after allocation, i.e. drm_bridge_add().
Suggested-by: Maxime Ripard <mripard@...nel.org>
Signed-off-by: Luca Ceresoli <luca.ceresoli@...tlin.com>
---
Changes in v9:
- remove sentence about old-style allocation
This patch was added in v8.
---
drivers/gpu/drm/drm_bridge.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c
index 22b459af112fd3cd2db00aa16668d270e028b307..b4c89ec01998b849018ce031c7cd84614e65e710 100644
--- a/drivers/gpu/drm/drm_bridge.c
+++ b/drivers/gpu/drm/drm_bridge.c
@@ -286,6 +286,9 @@ EXPORT_SYMBOL(__devm_drm_bridge_alloc);
* drm_bridge_add - add the given bridge to the global bridge list
*
* @bridge: bridge control structure
+ *
+ * The bridge to be added must have been allocated by
+ * devm_drm_bridge_alloc().
*/
void drm_bridge_add(struct drm_bridge *bridge)
{
--
2.49.0
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