1 files changed, 60 insertions, 0 deletions
diff --git a/drivers/gpu/drm/omapdrm/dss/display.c b/drivers/gpu/drm/omapdrm/dss/display.c
new file mode 100644
index 000000000..3b82158b1
--- /dev/null
+++ b/drivers/gpu/drm/omapdrm/dss/display.c
@@ -0,0 +1,60 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2009 Nokia Corporation
+ * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
+ *
+ * Some code and ideas taken from drivers/video/omap/ driver
+ * by Imre Deak.
+ */
+
+#define DSS_SUBSYS_NAME "DISPLAY"
+
+#include <linux/kernel.h>
+#include <linux/of.h>
+
+#include <drm/drm_connector.h>
+#include <drm/drm_modes.h>
+
+#include "omapdss.h"
+
+static int disp_num_counter;
+
+void omapdss_display_init(struct omap_dss_device *dssdev)
+{
+	int id;
+
+	/*
+	 * Note: this presumes that all displays either have an DT alias, or
+	 * none has.
+	 */
+	id = of_alias_get_id(dssdev->dev->of_node, "display");
+	if (id < 0)
+		id = disp_num_counter++;
+
+	/* Use 'label' property for name, if it exists */
+	of_property_read_string(dssdev->dev->of_node, "label", &dssdev->name);
+
+	if (dssdev->name == NULL)
+		dssdev->name = devm_kasprintf(dssdev->dev, GFP_KERNEL,
+					      "display%u", id);
+}
+EXPORT_SYMBOL_GPL(omapdss_display_init);
+
+int omapdss_display_get_modes(struct drm_connector *connector,
+			      const struct videomode *vm)
+{
+	struct drm_display_mode *mode;
+
+	mode = drm_mode_create(connector->dev);
+	if (!mode)
+		return 0;
+
+	drm_display_mode_from_videomode(vm, mode);
+
+	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
+	drm_mode_set_name(mode);
+	drm_mode_probed_add(connector, mode);
+
+	return 1;
+}
+EXPORT_SYMBOL_GPL(omapdss_display_get_modes);