[PATCH RFC v2 22/24] drm/bridge: samsung-dsim: implement .get_next_bridge

[Luca Ceresoli]

Add get_next_callback func to expose the next bridge.

Signed-off-by: Luca Ceresoli <luca.ceres...@bootlin.com>
---
 drivers/gpu/drm/bridge/samsung-dsim.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c 
b/drivers/gpu/drm/bridge/samsung-dsim.c
index 6c48404fd60a..2da3a13260b9 100644
--- a/drivers/gpu/drm/bridge/samsung-dsim.c
+++ b/drivers/gpu/drm/bridge/samsung-dsim.c
@@ -1821,6 +1821,13 @@ static void samsung_dsim_mode_set(struct drm_bridge 
*bridge,
        drm_mode_copy(&dsi->mode, adjusted_mode);
 }
 
+static struct drm_bridge *samsung_dsim_get_next_bridge(struct drm_bridge 
*bridge)
+{
+       struct samsung_dsim *dsi = bridge_to_dsi(bridge);
+
+       return dsi->bridge.next_bridge ?: ERR_PTR(-ENODEV);
+}
+
 static int samsung_dsim_attach(struct drm_bridge *bridge,
                               struct drm_encoder *encoder,
                               enum drm_bridge_attach_flags flags)
@@ -1835,6 +1842,7 @@ static int samsung_dsim_attach(struct drm_bridge *bridge,
 }
 
 static const struct drm_bridge_funcs samsung_dsim_bridge_funcs = {
+       .get_next_bridge                = samsung_dsim_get_next_bridge,
        .atomic_duplicate_state         = 
drm_atomic_helper_bridge_duplicate_state,
        .atomic_destroy_state           = 
drm_atomic_helper_bridge_destroy_state,
        .atomic_create_state                    = 
drm_atomic_helper_bridge_create_state,
@@ -2200,6 +2208,7 @@ int samsung_dsim_probe(struct platform_device *pdev)
 
        dsi->bridge.of_node = dev->of_node;
        dsi->bridge.type = DRM_MODE_CONNECTOR_DSI;
+       dsi->bridge.ops = DRM_BRIDGE_OP_GET_NEXT_BRIDGE;
 
        /* DE_LOW: i.MX8M Mini/Nano LCDIF-DSIM glue logic inverts HS/VS/DE */
        if (dsi->plat_data->hw_type == DSIM_TYPE_IMX8MM)

-- 
2.55.0