drm/bridge: tc358775: Switch to devm MIPI-DSI helpers

Let's switch to the new devm MIPI-DSI function to register and attach
our secondary device. This also avoids leaking the device when we detach
the bridge.
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20211025151536.1048186-19-maxime@cerno.tech

drivers/gpu/drm/bridge/tc358775.c

@@ -610,11 +610,10 @@ static int tc_bridge_attach(struct drm_bridge *bridge,
 		return -EPROBE_DEFER;
 	}
 
-	dsi = mipi_dsi_device_register_full(host, &info);
+	dsi = devm_mipi_dsi_device_register_full(dev, host, &info);
 	if (IS_ERR(dsi)) {
 		dev_err(dev, "failed to create dsi device\n");
-		ret = PTR_ERR(dsi);
-		goto err_dsi_device;
+		return PTR_ERR(dsi);
 	}
 
 	tc->dsi = dsi;
@@ -623,19 +622,15 @@ static int tc_bridge_attach(struct drm_bridge *bridge,
 	dsi->format = MIPI_DSI_FMT_RGB888;
 	dsi->mode_flags = MIPI_DSI_MODE_VIDEO;
 
-	ret = mipi_dsi_attach(dsi);
+	ret = devm_mipi_dsi_attach(dev, dsi);
 	if (ret < 0) {
 		dev_err(dev, "failed to attach dsi to host\n");
-		goto err_dsi_attach;
+		return ret;
 	}
 
 	/* Attach the panel-bridge to the dsi bridge */
 	return drm_bridge_attach(bridge->encoder, tc->panel_bridge,
 				 &tc->bridge, flags);
-err_dsi_attach:
-	mipi_dsi_device_unregister(dsi);
-err_dsi_device:
-	return ret;
 }
 
 static const struct drm_bridge_funcs tc_bridge_funcs = {