drm/bridge: tc358768: don't create a panel_bridge

Now a panel_bridge is automatically created for every drm_panel and the
panel-bridge API is just a deprecated wrapper to access it.

Update and simplify the code by just getting a reference to the
already-existing bridge using of_drm_get_bridge_by_endpoint().

As of_drm_get_bridge_by_endpoint() returns a refcounted bridge, take care
of putting the bridge reference when not used anymore.

Acked-by: Maxime Ripard <mripard@kernel.org>
Link: https://patch.msgid.link/20260916-drm-bridge-every-panel-v3-15-83afb4f1a707@bootlin.com
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>

2 files changed, 6 insertions, 21 deletions

diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
index 4be220f7335c..847a6397eb10 100644
--- a/drivers/gpu/drm/bridge/Kconfig
+++ b/drivers/gpu/drm/bridge/Kconfig
@@ -408,8 +408,6 @@ config DRM_TOSHIBA_TC358768
 	depends on OF
 	select DRM_KMS_HELPER
 	select REGMAP_I2C
-	select DRM_PANEL
-	select DRM_PANEL_BRIDGE
 	select DRM_MIPI_DSI
 	select VIDEOMODE_HELPERS
 	help
diff --git a/drivers/gpu/drm/bridge/tc358768.c b/drivers/gpu/drm/bridge/tc358768.c
index 19b43efcf93f..18f73ad2589e 100644
--- a/drivers/gpu/drm/bridge/tc358768.c
+++ b/drivers/gpu/drm/bridge/tc358768.c
@@ -22,7 +22,6 @@
 #include <drm/drm_drv.h>
 #include <drm/drm_mipi_dsi.h>
 #include <drm/drm_of.h>
-#include <drm/drm_panel.h>
 #include <video/mipi_display.h>
 #include <video/videomode.h>
 
@@ -137,7 +136,6 @@ static const char * const tc358768_supplies[] = {
 
 struct tc358768_dsi_output {
 	struct mipi_dsi_device *dev;
-	struct drm_panel *panel;
 	struct drm_bridge *bridge;
 };
 
@@ -443,7 +441,6 @@ static int tc358768_dsi_host_attach(struct mipi_dsi_host *host,
 {
 	struct tc358768_priv *priv = dsi_host_to_tc358768(host);
 	struct drm_bridge *bridge;
-	struct drm_panel *panel;
 	struct device_node *ep;
 	int ret;
 
@@ -471,24 +468,15 @@ static int tc358768_dsi_host_attach(struct mipi_dsi_host *host,
 		return -ENOTSUPP;
 	}
 
-	ret = drm_of_find_panel_or_bridge(host->dev->of_node, 1, 0, &panel,
-					  &bridge);
-	if (ret)
-		return ret;
+	bridge = of_drm_get_bridge_by_endpoint(host->dev->of_node, 1, 0);
+	if (IS_ERR(bridge))
+		return PTR_ERR(bridge);
 
-	if (panel) {
-		bridge = drm_panel_bridge_add_typed(panel,
-						    DRM_MODE_CONNECTOR_DSI);
-		drm_panel_put(panel);
-		if (IS_ERR(bridge))
-			return PTR_ERR(bridge);
-
-		bridge->pre_enable_prev_first = true;
-	}
+	bridge->type = DRM_MODE_CONNECTOR_DSI;
+	bridge->pre_enable_prev_first = true;
 
 	priv->output.dev = dev;
 	priv->output.bridge = bridge;
-	priv->output.panel = panel;
 
 	priv->dsi_lanes = dev->lanes;
 	priv->dsi_bpp = mipi_dsi_pixel_format_to_bpp(dev->format);
@@ -518,8 +506,7 @@ static int tc358768_dsi_host_detach(struct mipi_dsi_host *host,
 	struct tc358768_priv *priv = dsi_host_to_tc358768(host);
 
 	drm_bridge_remove(&priv->bridge);
-	if (priv->output.panel)
-		drm_panel_bridge_remove(priv->output.bridge);
+	drm_bridge_put(priv->output.bridge);
 
 	return 0;
 }