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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/drivers/gpu/drm/omapdrm/dss/omapdss-boot-init.c
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@@ -1,18 +1,7 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/
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  * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
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- *
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- * This program is free software; you can redistribute it and/or modify it
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- * under the terms of the GNU General Public License version 2 as published by
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- * the Free Software Foundation.
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- *
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- * This program is distributed in the hope that it will be useful, but WITHOUT
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- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
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- * more details.
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- *
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- * You should have received a copy of the GNU General Public License along with
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- * this program.  If not, see <http://www.gnu.org/licenses/>.
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  */
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 /*
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@@ -184,9 +173,29 @@
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 	{},
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 };
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+static const struct of_device_id omapdss_of_fixups_whitelist[] __initconst = {
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+	{ .compatible = "panel-dsi-cm" },
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+	{},
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+};
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+
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+static void __init omapdss_find_children(struct device_node *np)
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+{
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+	struct device_node *child;
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+
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+	for_each_available_child_of_node(np, child) {
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+		if (!of_find_property(child, "compatible", NULL))
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+			continue;
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+
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+		omapdss_walk_device(child, true);
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+
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+		if (of_device_is_compatible(child, "ti,sysc"))
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+			omapdss_find_children(child);
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+	}
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+}
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+
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 static int __init omapdss_boot_init(void)
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 {
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-	struct device_node *dss, *child;
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+	struct device_node *dss;
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 	INIT_LIST_HEAD(&dss_conv_list);
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@@ -196,13 +205,7 @@
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 		goto put_node;
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 	omapdss_walk_device(dss, true);
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-
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-	for_each_available_child_of_node(dss, child) {
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-		if (!of_find_property(child, "compatible", NULL))
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-			continue;
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-
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-		omapdss_walk_device(child, true);
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-	}
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+	omapdss_find_children(dss);
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 	while (!list_empty(&dss_conv_list)) {
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 		struct dss_conv_node *n;
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@@ -210,7 +213,7 @@
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 		n = list_first_entry(&dss_conv_list, struct dss_conv_node,
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 			list);
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-		if (!n->root)
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+		if (of_match_node(omapdss_of_fixups_whitelist, n->node))
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 			omapdss_omapify_node(n->node);
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 		list_del(&n->list);