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2024-01-04 1543e317f1da31b75942316931e8f491a8920811

 kernel/drivers/gpu/drm/omapdrm/dss/display.c
..
..
@@ -1,47 +1,26 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * Copyright (C) 2009 Nokia Corporation
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  * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
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  *
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  * Some code and ideas taken from drivers/video/omap/ driver
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  * by Imre Deak.
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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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9
 
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 #define DSS_SUBSYS_NAME "DISPLAY"
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11
 
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 #include <linux/kernel.h>
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-#include <linux/module.h>
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-#include <linux/jiffies.h>
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-#include <linux/platform_device.h>
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 #include <linux/of.h>
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+
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+#include <drm/drm_connector.h>
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+#include <drm/drm_modes.h>
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17
 
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 #include "omapdss.h"
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19
 
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-static void omapdss_default_get_timings(struct omap_dss_device *dssdev,
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-					struct videomode *vm)
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-{
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-	*vm = dssdev->panel.vm;
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-}
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-
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-static LIST_HEAD(panel_list);
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-static DEFINE_MUTEX(panel_list_mutex);
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 static int disp_num_counter;
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21
 
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-int omapdss_register_display(struct omap_dss_device *dssdev)
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+void omapdss_display_init(struct omap_dss_device *dssdev)
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 {
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-	struct omap_dss_driver *drv = dssdev->driver;
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-	struct list_head *cur;
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 	int id;
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 	/*
..
..
@@ -52,123 +31,30 @@
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 	if (id < 0)
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 		id = disp_num_counter++;
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33
 
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-	snprintf(dssdev->alias, sizeof(dssdev->alias), "display%d", id);
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-
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 	/* Use 'label' property for name, if it exists */
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 	of_property_read_string(dssdev->dev->of_node, "label", &dssdev->name);
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 	if (dssdev->name == NULL)
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-		dssdev->name = dssdev->alias;
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-
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-	if (drv && drv->get_timings == NULL)
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-		drv->get_timings = omapdss_default_get_timings;
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-
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-	mutex_lock(&panel_list_mutex);
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-	list_for_each(cur, &panel_list) {
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-		struct omap_dss_device *ldev = list_entry(cur,
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-							 struct omap_dss_device,
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-							 panel_list);
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-		if (strcmp(ldev->alias, dssdev->alias) > 0)
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-			break;
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-	}
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-	list_add_tail(&dssdev->panel_list, cur);
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-	mutex_unlock(&panel_list_mutex);
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-	return 0;
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+		dssdev->name = devm_kasprintf(dssdev->dev, GFP_KERNEL,
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+					      "display%u", id);
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40
 }
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-EXPORT_SYMBOL(omapdss_register_display);
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+EXPORT_SYMBOL_GPL(omapdss_display_init);
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42
 
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-void omapdss_unregister_display(struct omap_dss_device *dssdev)
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+int omapdss_display_get_modes(struct drm_connector *connector,
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+			      const struct videomode *vm)
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45
 {
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-	mutex_lock(&panel_list_mutex);
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-	list_del(&dssdev->panel_list);
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-	mutex_unlock(&panel_list_mutex);
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+	struct drm_display_mode *mode;
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+
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+	mode = drm_mode_create(connector->dev);
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+	if (!mode)
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+		return 0;
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+
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+	drm_display_mode_from_videomode(vm, mode);
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+
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+	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
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+	drm_mode_set_name(mode);
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+	drm_mode_probed_add(connector, mode);
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+
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+	return 1;
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 }
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-EXPORT_SYMBOL(omapdss_unregister_display);
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-
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-bool omapdss_component_is_display(struct device_node *node)
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-{
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-	struct omap_dss_device *dssdev;
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-	bool found = false;
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-
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-	mutex_lock(&panel_list_mutex);
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-	list_for_each_entry(dssdev, &panel_list, panel_list) {
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-		if (dssdev->dev->of_node == node) {
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-			found = true;
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-			goto out;
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-		}
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-	}
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-out:
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-	mutex_unlock(&panel_list_mutex);
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-	return found;
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-}
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-EXPORT_SYMBOL(omapdss_component_is_display);
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-
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-struct omap_dss_device *omap_dss_get_device(struct omap_dss_device *dssdev)
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-{
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-	if (!try_module_get(dssdev->owner))
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-		return NULL;
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-
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-	if (get_device(dssdev->dev) == NULL) {
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-		module_put(dssdev->owner);
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-		return NULL;
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-	}
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-
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-	return dssdev;
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-}
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-EXPORT_SYMBOL(omap_dss_get_device);
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-
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-void omap_dss_put_device(struct omap_dss_device *dssdev)
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-{
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-	put_device(dssdev->dev);
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-	module_put(dssdev->owner);
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-}
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-EXPORT_SYMBOL(omap_dss_put_device);
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-
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-/*
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- * ref count of the found device is incremented.
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- * ref count of from-device is decremented.
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- */
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-struct omap_dss_device *omap_dss_get_next_device(struct omap_dss_device *from)
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-{
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-	struct list_head *l;
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-	struct omap_dss_device *dssdev;
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-
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-	mutex_lock(&panel_list_mutex);
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-
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-	if (list_empty(&panel_list)) {
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-		dssdev = NULL;
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-		goto out;
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-	}
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-
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-	if (from == NULL) {
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-		dssdev = list_first_entry(&panel_list, struct omap_dss_device,
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-				panel_list);
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-		omap_dss_get_device(dssdev);
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-		goto out;
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-	}
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-
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-	omap_dss_put_device(from);
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-
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-	list_for_each(l, &panel_list) {
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-		dssdev = list_entry(l, struct omap_dss_device, panel_list);
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-		if (dssdev == from) {
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-			if (list_is_last(l, &panel_list)) {
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-				dssdev = NULL;
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-				goto out;
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-			}
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-
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-			dssdev = list_entry(l->next, struct omap_dss_device,
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-					panel_list);
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-			omap_dss_get_device(dssdev);
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-			goto out;
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-		}
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-	}
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-
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-	WARN(1, "'from' dssdev not found\n");
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-
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-	dssdev = NULL;
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-out:
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-	mutex_unlock(&panel_list_mutex);
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-	return dssdev;
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-}
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-EXPORT_SYMBOL(omap_dss_get_next_device);
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+EXPORT_SYMBOL_GPL(omapdss_display_get_modes);