[RFC 2/5] video: panel: Add dummy panel support

Laurent Pinchart
2012-08-17T00:49:40Z

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
drivers/video/panel/Kconfig | 11 ++++
drivers/video/panel/Makefile | 1 +
drivers/video/panel/panel-dummy.c | 103 +++++++++++++++++++++++++++++++++++++
include/video/panel-dummy.h | 25 +++++++++
4 files changed, 140 insertions(+), 0 deletions(-)
create mode 100644 drivers/video/panel/panel-dummy.c
create mode 100644 include/video/panel-dummy.h

diff --git a/drivers/video/panel/Kconfig b/drivers/video/panel/Kconfig
index 26b1787..36fb9ca 100644
--- a/drivers/video/panel/Kconfig
+++ b/drivers/video/panel/Kconfig
@@ -2,3 +2,14 @@ menuconfig DISPLAY_PANEL
tristate "Display Panel"
---help---
Support for display panels for graphics devices.
+
+if DISPLAY_PANEL
+
+config DISPLAY_PANEL_DUMMY
+ tristate "Dummy Display Panel"
+ ---help---
+ Support dummy panels with no control bus.
+
+ If you are in doubt, say N.
+
+endif # DISPLAY_PANEL
diff --git a/drivers/video/panel/Makefile b/drivers/video/panel/Makefile
index cf5c5e2..9fc05c2 100644
--- a/drivers/video/panel/Makefile
+++ b/drivers/video/panel/Makefile
@@ -1 +1,2 @@
obj-$(CONFIG_DISPLAY_PANEL) += panel.o
+obj-$(CONFIG_DISPLAY_PANEL_DUMMY) += panel-dummy.o
diff --git a/drivers/video/panel/panel-dummy.c b/drivers/video/panel/panel-dummy.c
new file mode 100644
index 0000000..9ba1447
--- /dev/null
+++ b/drivers/video/panel/panel-dummy.c
@@ -0,0 +1,103 @@
+/*
+ * Dummy Display Panel
+ *
+ * Copyright (C) 2012 Renesas Solutions Corp.
+ *
+ * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+#include <video/panel-dummy.h>
+
+struct panel_dummy {
+ struct panel panel;
+ const struct panel_dummy_platform_data *pdata;
+};
+
+#define to_panel_dummy(p) container_of(p, struct panel_dummy, panel)
+
+static int panel_dummy_get_modes(struct panel *p,
+ const struct fb_videomode **modes)
+{
+ struct panel_dummy *panel = to_panel_dummy(p);
+
+ *modes = panel->pdata->mode;
+ return 1;
+}
+
+static const struct panel_ops panel_dummy_ops = {
+ .get_modes = panel_dummy_get_modes,
+};
+
+static void panel_dummy_release(struct panel *p)
+{
+ struct panel_dummy *panel = to_panel_dummy(p);
+
+ kfree(panel);
+}
+
+static int panel_dummy_remove(struct platform_device *pdev)
+{
+ struct panel_dummy *panel = platform_get_drvdata(pdev);
+
+ platform_set_drvdata(pdev, NULL);
+ panel_unregister(&panel->panel);
+
+ return 0;
+}
+
+static int __devinit panel_dummy_probe(struct platform_device *pdev)
+{
+ const struct panel_dummy_platform_data *pdata = pdev->dev.platform_data;
+ struct panel_dummy *panel;
+ int ret;
+
+ if (pdata = NULL)
+ return -ENODEV;
+
+ panel = kzalloc(sizeof(*panel), GFP_KERNEL);
+ if (panel = NULL)
+ return -ENOMEM;
+
+ panel->pdata = pdata;
+ panel->panel.dev = &pdev->dev;
+ panel->panel.release = panel_dummy_release;
+ panel->panel.ops = &panel_dummy_ops;
+ panel->panel.width = pdata->width;
+ panel->panel.height = pdata->height;
+
+ ret = panel_register(&panel->panel);
+ if (ret < 0) {
+ kfree(panel);
+ return ret;
+ }
+
+ platform_set_drvdata(pdev, panel);
+
+ return 0;
+}
+
+static const struct dev_pm_ops panel_dummy_dev_pm_ops = {
+};
+
+static struct platform_driver panel_dummy_driver = {
+ .probe = panel_dummy_probe,
+ .remove = panel_dummy_remove,
+ .driver = {
+ .name = "panel_dummy",
+ .owner = THIS_MODULE,
+ .pm = &panel_dummy_dev_pm_ops,
+ },
+};
+
+module_platform_driver(panel_dummy_driver);
+
+MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
+MODULE_DESCRIPTION("Dummy Display Panel");
+MODULE_LICENSE("GPL");
diff --git a/include/video/panel-dummy.h b/include/video/panel-dummy.h
new file mode 100644
index 0000000..558a297
--- /dev/null
+++ b/include/video/panel-dummy.h
@@ -0,0 +1,25 @@
+/*
+ * Dummy Display Panel
+ *
+ * Copyright (C) 2012 Renesas Solutions Corp.
+ *
+ * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __PANEL_DUMMY_H__
+#define __PANEL_DUMMY_H__
+
+#include <linux/fb.h>
+#include <video/panel.h>
+
+struct panel_dummy_platform_data {
+ unsigned long width; /* Panel width in mm */
+ unsigned long height; /* Panel height in mm */
+ const struct fb_videomode *mode;
+};
+
+#endif /* __PANEL_DUMMY_H__ */
--
1.7.8.6