linux-kernel - [PATCH v4 10/15] drm/bridge: Introduce drm_bridge_is

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Message-Id: <20250225-bridge-connector-v4-10-7ecb07b09cad@kernel.org>
Date: Tue, 25 Feb 2025 17:43:58 +0100
From: Maxime Ripard <mripard@...nel.org>
To: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 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>, 
 Douglas Anderson <dianders@...omium.org>
Cc: Herve Codina <herve.codina@...tlin.com>, 
 dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
 Maxime Ripard <mripard@...nel.org>, 
 Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Subject: [PATCH v4 10/15] drm/bridge: Introduce drm_bridge_is_atomic()
 helper

We test for whether the bridge is atomic in several places in the source
code, so let's consolidate them.

Suggested-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Signed-off-by: Maxime Ripard <mripard@...nel.org>
---
 drivers/gpu/drm/drm_bridge.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c
index ca894531a2042fc9296c40a1f51a6cdea6e97ed7..4d6a72f8b7d1bd1641d434f9fedbc2f087e249ac 100644
--- a/drivers/gpu/drm/drm_bridge.c
+++ b/drivers/gpu/drm/drm_bridge.c
@@ -279,10 +279,15 @@ drm_bridge_atomic_destroy_priv_state(struct drm_private_obj *obj,
 static const struct drm_private_state_funcs drm_bridge_priv_state_funcs = {
 	.atomic_duplicate_state = drm_bridge_atomic_duplicate_priv_state,
 	.atomic_destroy_state = drm_bridge_atomic_destroy_priv_state,
 };
 
+static bool drm_bridge_is_atomic(struct drm_bridge *bridge)
+{
+	return bridge->funcs->atomic_reset != NULL;
+}
+
 /**
  * drm_bridge_attach - attach the bridge to an encoder's chain
  *
  * @encoder: DRM encoder
  * @bridge: bridge to attach
@@ -331,11 +336,11 @@ int drm_bridge_attach(struct drm_encoder *encoder, struct drm_bridge *bridge,
 		ret = bridge->funcs->attach(bridge, encoder, flags);
 		if (ret < 0)
 			goto err_reset_bridge;
 	}
 
-	if (bridge->funcs->atomic_reset) {
+	if (drm_bridge_is_atomic(bridge)) {
 		struct drm_bridge_state *state;
 
 		state = bridge->funcs->atomic_reset(bridge);
 		if (IS_ERR(state)) {
 			ret = PTR_ERR(state);
@@ -376,11 +381,11 @@ void drm_bridge_detach(struct drm_bridge *bridge)
 		return;
 
 	if (WARN_ON(!bridge->dev))
 		return;
 
-	if (bridge->funcs->atomic_reset)
+	if (drm_bridge_is_atomic(bridge))
 		drm_atomic_private_obj_fini(&bridge->base);
 
 	if (bridge->funcs->detach)
 		bridge->funcs->detach(bridge);
 

-- 
2.48.1