drm/bridge: sn65dsi86: 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/20211025151536.1048186-17-maxime@cerno.tech

drivers/gpu/drm/bridge/ti-sn65dsi86.c

@@ -709,6 +709,7 @@ static int ti_sn_bridge_attach(struct drm_bridge *bridge,
 	struct ti_sn65dsi86 *pdata = bridge_to_ti_sn65dsi86(bridge);
 	struct mipi_dsi_host *host;
 	struct mipi_dsi_device *dsi;
+	struct device *dev = pdata->dev;
 	const struct mipi_dsi_device_info info = { .type = "ti_sn_bridge",
 						   .channel = 0,
 						   .node = NULL,
@@ -748,7 +749,7 @@ static int ti_sn_bridge_attach(struct drm_bridge *bridge,
 		goto err_dsi_host;
 	}
 
-	dsi = mipi_dsi_device_register_full(host, &info);
+	dsi = devm_mipi_dsi_device_register_full(dev, host, &info);
 	if (IS_ERR(dsi)) {
 		DRM_ERROR("failed to create dsi device\n");
 		ret = PTR_ERR(dsi);
@@ -761,16 +762,16 @@ static int ti_sn_bridge_attach(struct drm_bridge *bridge,
 	dsi->mode_flags = MIPI_DSI_MODE_VIDEO;
 
 	/* check if continuous dsi clock is required or not */
-	pm_runtime_get_sync(pdata->dev);
+	pm_runtime_get_sync(dev);
 	regmap_read(pdata->regmap, SN_DPPLL_SRC_REG, &val);
-	pm_runtime_put_autosuspend(pdata->dev);
+	pm_runtime_put_autosuspend(dev);
 	if (!(val & DPPLL_CLK_SRC_DSICLK))
 		dsi->mode_flags |= MIPI_DSI_CLOCK_NON_CONTINUOUS;
 
-	ret = mipi_dsi_attach(dsi);
+	ret = devm_mipi_dsi_attach(dev, dsi);
 	if (ret < 0) {
 		DRM_ERROR("failed to attach dsi to host\n");
-		goto err_dsi_attach;
+		goto err_dsi_host;
 	}
 	pdata->dsi = dsi;
 
@@ -781,14 +782,10 @@ static int ti_sn_bridge_attach(struct drm_bridge *bridge,
 	ret = drm_bridge_attach(bridge->encoder, pdata->next_bridge,
 				&pdata->bridge, flags);
 	if (ret < 0)
-		goto err_dsi_detach;
+		goto err_dsi_host;
 
 	return 0;
 
-err_dsi_detach:
-	mipi_dsi_detach(dsi);
-err_dsi_attach:
-	mipi_dsi_device_unregister(dsi);
 err_dsi_host:
 	drm_connector_cleanup(&pdata->connector);
 err_conn_init:
@@ -1284,11 +1281,6 @@ static void ti_sn_bridge_remove(struct auxiliary_device *adev)
 	if (!pdata)
 		return;
 
-	if (pdata->dsi) {
-		mipi_dsi_detach(pdata->dsi);
-		mipi_dsi_device_unregister(pdata->dsi);
-	}
-
 	drm_bridge_remove(&pdata->bridge);
 
 	of_node_put(pdata->host_node);