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@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20250313-bridge-connector-v6-11-511c54a604fb@kernel.org
Signed-off-by: Maxime Ripard <mripard@kernel.org>

diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c
index 5bdce9db4475c9699bec11b1e4c0615af028b33d..ef98e21dc593f38a2d3c67b850032ece38bec5e8 100644 (file)
--- a/drivers/gpu/drm/drm_bridge.c
+++ b/drivers/gpu/drm/drm_bridge.c
@@ -281,6 +281,11 @@ static const struct drm_private_state_funcs drm_bridge_priv_state_funcs = {
        .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
  *
@@ -333,7 +338,7 @@ int drm_bridge_attach(struct drm_encoder *encoder, struct drm_bridge *bridge,
                        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);
@@ -378,7 +383,7 @@ void drm_bridge_detach(struct drm_bridge *bridge)
        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)