drm/meson: encoder_dsi: get/put the next bridge

This driver obtains a bridge pointer from of_drm_find_bridge() in the probe
function and stores it until driver removal. of_drm_find_bridge() is
deprecated. Move to of_drm_find_and_get_bridge() for the bridge to be
refcounted and use bridge->next_bridge to put the reference on
deallocation.

Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Reviewed-by: Maxime Ripard <mripard@kernel.org>
Link: https://patch.msgid.link/20251216-drm-bridge-alloc-getput-drm_of_find_bridge-v3-11-b5165fab8058@bootlin.com
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>

diff --git a/drivers/gpu/drm/meson/meson_encoder_dsi.c b/drivers/gpu/drm/meson/meson_encoder_dsi.c
index 6c6624f9ba24a182900215d65b3ad7ab8aab6cf8..eba246791c686da5b536be9baf341ed22fdfcda1 100644 (file)
--- a/drivers/gpu/drm/meson/meson_encoder_dsi.c
+++ b/drivers/gpu/drm/meson/meson_encoder_dsi.c
@@ -25,7 +25,6 @@
 struct meson_encoder_dsi {
        struct drm_encoder encoder;
        struct drm_bridge bridge;
-       struct drm_bridge *next_bridge;
        struct meson_drm *priv;
 };
 
@@ -38,7 +37,7 @@ static int meson_encoder_dsi_attach(struct drm_bridge *bridge,
 {
        struct meson_encoder_dsi *encoder_dsi = bridge_to_meson_encoder_dsi(bridge);
 
-       return drm_bridge_attach(encoder, encoder_dsi->next_bridge,
+       return drm_bridge_attach(encoder, encoder_dsi->bridge.next_bridge,
                                 &encoder_dsi->bridge, flags);
 }
 
@@ -120,8 +119,8 @@ int meson_encoder_dsi_probe(struct meson_drm *priv)
                return 0;
        }
 
-       meson_encoder_dsi->next_bridge = of_drm_find_bridge(remote);
-       if (!meson_encoder_dsi->next_bridge)
+       meson_encoder_dsi->bridge.next_bridge = of_drm_find_and_get_bridge(remote);
+       if (!meson_encoder_dsi->bridge.next_bridge)
                return dev_err_probe(priv->dev, -EPROBE_DEFER,
                                     "Failed to find DSI transceiver bridge\n");