2 * linux/drivers/video/omap2/dss/core.c
4 * Copyright (C) 2009 Nokia Corporation
5 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
7 * Some code and ideas taken from drivers/video/omap/ driver
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License version 2 as published by
12 * the Free Software Foundation.
14 * This program is distributed in the hope that it will be useful, but WITHOUT
15 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
19 * You should have received a copy of the GNU General Public License along with
20 * this program. If not, see <http://www.gnu.org/licenses/>.
23 #define DSS_SUBSYS_NAME "CORE"
25 #include <linux/kernel.h>
26 #include <linux/module.h>
27 #include <linux/clk.h>
28 #include <linux/err.h>
29 #include <linux/platform_device.h>
30 #include <linux/seq_file.h>
31 #include <linux/debugfs.h>
33 #include <linux/device.h>
34 #include <linux/regulator/consumer.h>
35 #include <linux/suspend.h>
36 #include <linux/slab.h>
38 #include <video/omapfb_dss.h>
41 #include "dss_features.h"
44 struct platform_device *pdev;
46 const char *default_display_name;
49 static char *def_disp_name;
50 module_param_named(def_disp, def_disp_name, charp, 0);
51 MODULE_PARM_DESC(def_disp, "default display name");
53 const char *omapdss_get_default_display_name(void)
55 return core.default_display_name;
57 EXPORT_SYMBOL(omapdss_get_default_display_name);
59 enum omapdss_version omapdss_get_version(void)
61 struct omap_dss_board_info *pdata = core.pdev->dev.platform_data;
62 return pdata->version;
64 EXPORT_SYMBOL(omapdss_get_version);
66 struct platform_device *dss_get_core_pdev(void)
71 int dss_dsi_enable_pads(int dsi_id, unsigned lane_mask)
73 struct omap_dss_board_info *board_data = core.pdev->dev.platform_data;
75 if (!board_data->dsi_enable_pads)
78 return board_data->dsi_enable_pads(dsi_id, lane_mask);
81 void dss_dsi_disable_pads(int dsi_id, unsigned lane_mask)
83 struct omap_dss_board_info *board_data = core.pdev->dev.platform_data;
85 if (!board_data->dsi_disable_pads)
88 return board_data->dsi_disable_pads(dsi_id, lane_mask);
91 int dss_set_min_bus_tput(struct device *dev, unsigned long tput)
93 struct omap_dss_board_info *pdata = core.pdev->dev.platform_data;
95 if (pdata->set_min_bus_tput)
96 return pdata->set_min_bus_tput(dev, tput);
101 #if defined(CONFIG_FB_OMAP2_DSS_DEBUGFS)
102 static int dss_debug_show(struct seq_file *s, void *unused)
104 void (*func)(struct seq_file *) = s->private;
109 static int dss_debug_open(struct inode *inode, struct file *file)
111 return single_open(file, dss_debug_show, inode->i_private);
114 static const struct file_operations dss_debug_fops = {
115 .open = dss_debug_open,
118 .release = single_release,
121 static struct dentry *dss_debugfs_dir;
123 static int dss_initialize_debugfs(void)
125 dss_debugfs_dir = debugfs_create_dir("omapdss", NULL);
126 if (IS_ERR(dss_debugfs_dir)) {
127 int err = PTR_ERR(dss_debugfs_dir);
128 dss_debugfs_dir = NULL;
132 debugfs_create_file("clk", S_IRUGO, dss_debugfs_dir,
133 &dss_debug_dump_clocks, &dss_debug_fops);
138 static void dss_uninitialize_debugfs(void)
140 debugfs_remove_recursive(dss_debugfs_dir);
143 int dss_debugfs_create_file(const char *name, void (*write)(struct seq_file *))
147 d = debugfs_create_file(name, S_IRUGO, dss_debugfs_dir,
148 write, &dss_debug_fops);
150 return PTR_ERR_OR_ZERO(d);
152 #else /* CONFIG_FB_OMAP2_DSS_DEBUGFS */
153 static inline int dss_initialize_debugfs(void)
157 static inline void dss_uninitialize_debugfs(void)
160 int dss_debugfs_create_file(const char *name, void (*write)(struct seq_file *))
164 #endif /* CONFIG_FB_OMAP2_DSS_DEBUGFS */
166 /* PLATFORM DEVICE */
167 static int omap_dss_pm_notif(struct notifier_block *b, unsigned long v, void *d)
169 DSSDBG("pm notif %lu\n", v);
172 case PM_SUSPEND_PREPARE:
173 case PM_HIBERNATION_PREPARE:
174 case PM_RESTORE_PREPARE:
175 DSSDBG("suspending displays\n");
176 return dss_suspend_all_devices();
178 case PM_POST_SUSPEND:
179 case PM_POST_HIBERNATION:
180 case PM_POST_RESTORE:
181 DSSDBG("resuming displays\n");
182 return dss_resume_all_devices();
189 static struct notifier_block omap_dss_pm_notif_block = {
190 .notifier_call = omap_dss_pm_notif,
193 static int __init omap_dss_probe(struct platform_device *pdev)
199 dss_features_init(omapdss_get_version());
201 r = dss_initialize_debugfs();
206 core.default_display_name = def_disp_name;
208 register_pm_notifier(&omap_dss_pm_notif_block);
217 static int omap_dss_remove(struct platform_device *pdev)
219 unregister_pm_notifier(&omap_dss_pm_notif_block);
221 dss_uninitialize_debugfs();
226 static void omap_dss_shutdown(struct platform_device *pdev)
228 DSSDBG("shutdown\n");
229 dss_disable_all_devices();
232 static struct platform_driver omap_dss_driver = {
233 .remove = omap_dss_remove,
234 .shutdown = omap_dss_shutdown,
241 static int (*dss_output_drv_reg_funcs[])(void) __initdata = {
242 dss_init_platform_driver,
243 dispc_init_platform_driver,
244 #ifdef CONFIG_FB_OMAP2_DSS_DSI
245 dsi_init_platform_driver,
247 #ifdef CONFIG_FB_OMAP2_DSS_DPI
248 dpi_init_platform_driver,
250 #ifdef CONFIG_FB_OMAP2_DSS_SDI
251 sdi_init_platform_driver,
253 #ifdef CONFIG_FB_OMAP2_DSS_RFBI
254 rfbi_init_platform_driver,
256 #ifdef CONFIG_FB_OMAP2_DSS_VENC
257 venc_init_platform_driver,
259 #ifdef CONFIG_FB_OMAP4_DSS_HDMI
260 hdmi4_init_platform_driver,
262 #ifdef CONFIG_FB_OMAP5_DSS_HDMI
263 hdmi5_init_platform_driver,
267 static void (*dss_output_drv_unreg_funcs[])(void) = {
268 #ifdef CONFIG_FB_OMAP5_DSS_HDMI
269 hdmi5_uninit_platform_driver,
271 #ifdef CONFIG_FB_OMAP4_DSS_HDMI
272 hdmi4_uninit_platform_driver,
274 #ifdef CONFIG_FB_OMAP2_DSS_VENC
275 venc_uninit_platform_driver,
277 #ifdef CONFIG_FB_OMAP2_DSS_RFBI
278 rfbi_uninit_platform_driver,
280 #ifdef CONFIG_FB_OMAP2_DSS_SDI
281 sdi_uninit_platform_driver,
283 #ifdef CONFIG_FB_OMAP2_DSS_DPI
284 dpi_uninit_platform_driver,
286 #ifdef CONFIG_FB_OMAP2_DSS_DSI
287 dsi_uninit_platform_driver,
289 dispc_uninit_platform_driver,
290 dss_uninit_platform_driver,
293 static int __init omap_dss_init(void)
298 r = platform_driver_probe(&omap_dss_driver, omap_dss_probe);
302 for (i = 0; i < ARRAY_SIZE(dss_output_drv_reg_funcs); ++i) {
303 r = dss_output_drv_reg_funcs[i]();
311 for (i = ARRAY_SIZE(dss_output_drv_reg_funcs) - i;
312 i < ARRAY_SIZE(dss_output_drv_reg_funcs);
314 dss_output_drv_unreg_funcs[i]();
316 platform_driver_unregister(&omap_dss_driver);
321 static void __exit omap_dss_exit(void)
325 for (i = 0; i < ARRAY_SIZE(dss_output_drv_unreg_funcs); ++i)
326 dss_output_drv_unreg_funcs[i]();
328 platform_driver_unregister(&omap_dss_driver);
331 module_init(omap_dss_init);
332 module_exit(omap_dss_exit);
334 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@nokia.com>");
335 MODULE_DESCRIPTION("OMAP2/3 Display Subsystem");
336 MODULE_LICENSE("GPL v2");