1 files changed, 28 insertions, 6 deletions

diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
index 72726f2c7a9f..33628d85edad 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
@@ -255,6 +255,7 @@ struct exynos_dsi {
 	struct mipi_dsi_host dsi_host;
 	struct drm_connector connector;
 	struct drm_panel *panel;
+	struct list_head bridge_chain;
 	struct drm_bridge *out_bridge;
 	struct device *dev;
 
@@ -1377,6 +1378,7 @@ static void exynos_dsi_unregister_te_irq(struct exynos_dsi *dsi)
 static void exynos_dsi_enable(struct drm_encoder *encoder)
 {
 	struct exynos_dsi *dsi = encoder_to_dsi(encoder);
+	struct drm_bridge *iter;
 	int ret;
 
 	if (dsi->state & DSIM_STATE_ENABLED)
@@ -1390,7 +1392,11 @@ static void exynos_dsi_enable(struct drm_encoder *encoder)
 		if (ret < 0)
 			goto err_put_sync;
 	} else {
-		drm_bridge_pre_enable(dsi->out_bridge);
+		list_for_each_entry_reverse(iter, &dsi->bridge_chain,
+					    chain_node) {
+			if (iter->funcs->pre_enable)
+				iter->funcs->pre_enable(iter);
+		}
 	}
 
 	exynos_dsi_set_display_mode(dsi);
@@ -1401,7 +1407,10 @@ static void exynos_dsi_enable(struct drm_encoder *encoder)
 		if (ret < 0)
 			goto err_display_disable;
 	} else {
-		drm_bridge_enable(dsi->out_bridge);
+		list_for_each_entry(iter, &dsi->bridge_chain, chain_node) {
+			if (iter->funcs->enable)
+				iter->funcs->enable(iter);
+		}
 	}
 
 	dsi->state |= DSIM_STATE_VIDOUT_AVAILABLE;
@@ -1419,6 +1428,7 @@ err_put_sync:
 static void exynos_dsi_disable(struct drm_encoder *encoder)
 {
 	struct exynos_dsi *dsi = encoder_to_dsi(encoder);
+	struct drm_bridge *iter;
 
 	if (!(dsi->state & DSIM_STATE_ENABLED))
 		return;
@@ -1426,10 +1436,20 @@ static void exynos_dsi_disable(struct drm_encoder *encoder)
 	dsi->state &= ~DSIM_STATE_VIDOUT_AVAILABLE;
 
 	drm_panel_disable(dsi->panel);
-	drm_bridge_disable(dsi->out_bridge);
+
+	list_for_each_entry_reverse(iter, &dsi->bridge_chain, chain_node) {
+		if (iter->funcs->disable)
+			iter->funcs->disable(iter);
+	}
+
 	exynos_dsi_set_display_enable(dsi, false);
 	drm_panel_unprepare(dsi->panel);
-	drm_bridge_post_disable(dsi->out_bridge);
+
+	list_for_each_entry(iter, &dsi->bridge_chain, chain_node) {
+		if (iter->funcs->post_disable)
+			iter->funcs->post_disable(iter);
+	}
+
 	dsi->state &= ~DSIM_STATE_ENABLED;
 	pm_runtime_put_sync(dsi->dev);
 }
@@ -1461,7 +1481,7 @@ static int exynos_dsi_get_modes(struct drm_connector *connector)
 	struct exynos_dsi *dsi = connector_to_dsi(connector);
 
 	if (dsi->panel)
-		return dsi->panel->funcs->get_modes(dsi->panel);
+		return drm_panel_get_modes(dsi->panel, connector);
 
 	return 0;
 }
@@ -1522,7 +1542,7 @@ static int exynos_dsi_host_attach(struct mipi_dsi_host *host,
 	if (out_bridge) {
 		drm_bridge_attach(encoder, out_bridge, NULL);
 		dsi->out_bridge = out_bridge;
-		encoder->bridge = NULL;
+		list_splice_init(&encoder->bridge_chain, &dsi->bridge_chain);
 	} else {
 		int ret = exynos_dsi_create_connector(encoder);
 
@@ -1588,6 +1608,7 @@ static int exynos_dsi_host_detach(struct mipi_dsi_host *host,
 		if (dsi->out_bridge->funcs->detach)
 			dsi->out_bridge->funcs->detach(dsi->out_bridge);
 		dsi->out_bridge = NULL;
+		INIT_LIST_HEAD(&dsi->bridge_chain);
 	}
 
 	if (drm->mode_config.poll_enabled)
@@ -1735,6 +1756,7 @@ static int exynos_dsi_probe(struct platform_device *pdev)
 	init_completion(&dsi->completed);
 	spin_lock_init(&dsi->transfer_lock);
 	INIT_LIST_HEAD(&dsi->transfer_list);
+	INIT_LIST_HEAD(&dsi->bridge_chain);
 
 	dsi->dsi_host.ops = &exynos_dsi_ops;
 	dsi->dsi_host.dev = dev;