linux-kernel - [PATCH 9/9] drm/omap: use drm_for_each_bridge_in_chain

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Message-Id: <20250723-drm-bridge-alloc-getput-for_each_bridge-v1-9-be8f4ae006e9@bootlin.com>
Date: Wed, 23 Jul 2025 11:54:16 +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>, 
 Miguel Ojeda <ojeda@...nel.org>, Nathan Chancellor <nathan@...nel.org>, 
 Nick Desaulniers <nick.desaulniers+lkml@...il.com>, 
 Bill Wendling <morbo@...gle.com>, Justin Stitt <justinstitt@...gle.com>, 
 Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
Cc: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>, 
 Chaoyi Chen <chaoyi.chen@...k-chips.com>, Hui Pu <Hui.Pu@...ealthcare.com>, 
 Thomas Petazzoni <thomas.petazzoni@...tlin.com>, 
 dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
 llvm@...ts.linux.dev, Luca Ceresoli <luca.ceresoli@...tlin.com>
Subject: [PATCH 9/9] drm/omap: use drm_for_each_bridge_in_chain_from()

Use drm_for_each_bridge_in_chain_from _scoped() instead of an open-coded
loop based on drm_bridge_get_next_bridge() to ensure the bridge being
looped on is refcounted and simplify the driver code.

Signed-off-by: Luca Ceresoli <luca.ceresoli@...tlin.com>
---
 drivers/gpu/drm/omapdrm/omap_encoder.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/omapdrm/omap_encoder.c b/drivers/gpu/drm/omapdrm/omap_encoder.c
index 4dd05bc732daebcedbfcbbc9ba7dffee7415bdfc..195715b162e38ea0cd0870f3dd79342a8cbf218b 100644
--- a/drivers/gpu/drm/omapdrm/omap_encoder.c
+++ b/drivers/gpu/drm/omapdrm/omap_encoder.c
@@ -77,7 +77,6 @@ static void omap_encoder_mode_set(struct drm_encoder *encoder,
 	struct omap_dss_device *output = omap_encoder->output;
 	struct drm_device *dev = encoder->dev;
 	struct drm_connector *connector;
-	struct drm_bridge *bridge;
 	struct videomode vm = { 0 };
 	u32 bus_flags;
 
@@ -97,8 +96,7 @@ static void omap_encoder_mode_set(struct drm_encoder *encoder,
 	 *
 	 * A better solution is to use DRM's bus-flags through the whole driver.
 	 */
-	for (bridge = output->bridge; bridge;
-	     bridge = drm_bridge_get_next_bridge(bridge)) {
+	drm_for_each_bridge_in_chain_from(output->bridge, bridge) {
 		if (!bridge->timings)
 			continue;
 

-- 
2.50.1