1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * linux/drivers/video/omap2/dss/core.c
4 *
5 * Copyright (C) 2009 Nokia Corporation
6 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
7 *
8 * Some code and ideas taken from drivers/video/omap/ driver
9 * by Imre Deak.
10 */
11
12 #define DSS_SUBSYS_NAME "CORE"
13
14 #include <linux/kernel.h>
15 #include <linux/module.h>
16 #include <linux/clk.h>
17 #include <linux/err.h>
18 #include <linux/platform_device.h>
19 #include <linux/seq_file.h>
20 #include <linux/debugfs.h>
21 #include <linux/io.h>
22 #include <linux/device.h>
23 #include <linux/regulator/consumer.h>
24 #include <linux/suspend.h>
25 #include <linux/slab.h>
26
27 #include <video/omapfb_dss.h>
28
29 #include "dss.h"
30 #include "dss_features.h"
31
32 static struct {
33 struct platform_device *pdev;
34
35 const char *default_display_name;
36 } core;
37
38 static char *def_disp_name;
39 module_param_named(def_disp, def_disp_name, charp, 0);
40 MODULE_PARM_DESC(def_disp, "default display name");
41
omapdss_get_default_display_name(void)42 const char *omapdss_get_default_display_name(void)
43 {
44 return core.default_display_name;
45 }
46 EXPORT_SYMBOL(omapdss_get_default_display_name);
47
omapdss_get_version(void)48 enum omapdss_version omapdss_get_version(void)
49 {
50 struct omap_dss_board_info *pdata = core.pdev->dev.platform_data;
51 return pdata->version;
52 }
53 EXPORT_SYMBOL(omapdss_get_version);
54
dss_get_core_pdev(void)55 struct platform_device *dss_get_core_pdev(void)
56 {
57 return core.pdev;
58 }
59
dss_dsi_enable_pads(int dsi_id,unsigned lane_mask)60 int dss_dsi_enable_pads(int dsi_id, unsigned lane_mask)
61 {
62 struct omap_dss_board_info *board_data = core.pdev->dev.platform_data;
63
64 if (!board_data->dsi_enable_pads)
65 return -ENOENT;
66
67 return board_data->dsi_enable_pads(dsi_id, lane_mask);
68 }
69
dss_dsi_disable_pads(int dsi_id,unsigned lane_mask)70 void dss_dsi_disable_pads(int dsi_id, unsigned lane_mask)
71 {
72 struct omap_dss_board_info *board_data = core.pdev->dev.platform_data;
73
74 if (!board_data->dsi_disable_pads)
75 return;
76
77 return board_data->dsi_disable_pads(dsi_id, lane_mask);
78 }
79
dss_set_min_bus_tput(struct device * dev,unsigned long tput)80 int dss_set_min_bus_tput(struct device *dev, unsigned long tput)
81 {
82 struct omap_dss_board_info *pdata = core.pdev->dev.platform_data;
83
84 if (pdata->set_min_bus_tput)
85 return pdata->set_min_bus_tput(dev, tput);
86 else
87 return 0;
88 }
89
90 #if defined(CONFIG_FB_OMAP2_DSS_DEBUGFS)
dss_show(struct seq_file * s,void * unused)91 static int dss_show(struct seq_file *s, void *unused)
92 {
93 void (*func)(struct seq_file *) = s->private;
94 func(s);
95 return 0;
96 }
97
98 DEFINE_SHOW_ATTRIBUTE(dss);
99
100 static struct dentry *dss_debugfs_dir;
101
dss_initialize_debugfs(void)102 static void dss_initialize_debugfs(void)
103 {
104 dss_debugfs_dir = debugfs_create_dir("omapdss", NULL);
105
106 debugfs_create_file("clk", S_IRUGO, dss_debugfs_dir,
107 &dss_debug_dump_clocks, &dss_fops);
108 }
109
dss_uninitialize_debugfs(void)110 static void dss_uninitialize_debugfs(void)
111 {
112 debugfs_remove_recursive(dss_debugfs_dir);
113 }
114
dss_debugfs_create_file(const char * name,void (* write)(struct seq_file *))115 void dss_debugfs_create_file(const char *name, void (*write)(struct seq_file *))
116 {
117 debugfs_create_file(name, S_IRUGO, dss_debugfs_dir, write, &dss_fops);
118 }
119 #else /* CONFIG_FB_OMAP2_DSS_DEBUGFS */
dss_initialize_debugfs(void)120 static inline void dss_initialize_debugfs(void)
121 {
122 }
dss_uninitialize_debugfs(void)123 static inline void dss_uninitialize_debugfs(void)
124 {
125 }
dss_debugfs_create_file(const char * name,void (* write)(struct seq_file *))126 void dss_debugfs_create_file(const char *name, void (*write)(struct seq_file *))
127 {
128 }
129 #endif /* CONFIG_FB_OMAP2_DSS_DEBUGFS */
130
131 /* PLATFORM DEVICE */
omap_dss_pm_notif(struct notifier_block * b,unsigned long v,void * d)132 static int omap_dss_pm_notif(struct notifier_block *b, unsigned long v, void *d)
133 {
134 DSSDBG("pm notif %lu\n", v);
135
136 switch (v) {
137 case PM_SUSPEND_PREPARE:
138 case PM_HIBERNATION_PREPARE:
139 case PM_RESTORE_PREPARE:
140 DSSDBG("suspending displays\n");
141 return dss_suspend_all_devices();
142
143 case PM_POST_SUSPEND:
144 case PM_POST_HIBERNATION:
145 case PM_POST_RESTORE:
146 DSSDBG("resuming displays\n");
147 return dss_resume_all_devices();
148
149 default:
150 return 0;
151 }
152 }
153
154 static struct notifier_block omap_dss_pm_notif_block = {
155 .notifier_call = omap_dss_pm_notif,
156 };
157
omap_dss_probe(struct platform_device * pdev)158 static int __init omap_dss_probe(struct platform_device *pdev)
159 {
160 core.pdev = pdev;
161
162 dss_features_init(omapdss_get_version());
163
164 dss_initialize_debugfs();
165
166 if (def_disp_name)
167 core.default_display_name = def_disp_name;
168
169 register_pm_notifier(&omap_dss_pm_notif_block);
170
171 return 0;
172 }
173
omap_dss_remove(struct platform_device * pdev)174 static void omap_dss_remove(struct platform_device *pdev)
175 {
176 unregister_pm_notifier(&omap_dss_pm_notif_block);
177
178 dss_uninitialize_debugfs();
179 }
180
omap_dss_shutdown(struct platform_device * pdev)181 static void omap_dss_shutdown(struct platform_device *pdev)
182 {
183 DSSDBG("shutdown\n");
184 dss_disable_all_devices();
185 }
186
187 static struct platform_driver omap_dss_driver = {
188 .remove_new = omap_dss_remove,
189 .shutdown = omap_dss_shutdown,
190 .driver = {
191 .name = "omapdss",
192 },
193 };
194
195 /* INIT */
196 static int (*dss_output_drv_reg_funcs[])(void) __initdata = {
197 dss_init_platform_driver,
198 dispc_init_platform_driver,
199 #ifdef CONFIG_FB_OMAP2_DSS_DSI
200 dsi_init_platform_driver,
201 #endif
202 #ifdef CONFIG_FB_OMAP2_DSS_DPI
203 dpi_init_platform_driver,
204 #endif
205 #ifdef CONFIG_FB_OMAP2_DSS_SDI
206 sdi_init_platform_driver,
207 #endif
208 #ifdef CONFIG_FB_OMAP2_DSS_VENC
209 venc_init_platform_driver,
210 #endif
211 #ifdef CONFIG_FB_OMAP4_DSS_HDMI
212 hdmi4_init_platform_driver,
213 #endif
214 #ifdef CONFIG_FB_OMAP5_DSS_HDMI
215 hdmi5_init_platform_driver,
216 #endif
217 };
218
219 static void (*dss_output_drv_unreg_funcs[])(void) = {
220 #ifdef CONFIG_FB_OMAP5_DSS_HDMI
221 hdmi5_uninit_platform_driver,
222 #endif
223 #ifdef CONFIG_FB_OMAP4_DSS_HDMI
224 hdmi4_uninit_platform_driver,
225 #endif
226 #ifdef CONFIG_FB_OMAP2_DSS_VENC
227 venc_uninit_platform_driver,
228 #endif
229 #ifdef CONFIG_FB_OMAP2_DSS_SDI
230 sdi_uninit_platform_driver,
231 #endif
232 #ifdef CONFIG_FB_OMAP2_DSS_DPI
233 dpi_uninit_platform_driver,
234 #endif
235 #ifdef CONFIG_FB_OMAP2_DSS_DSI
236 dsi_uninit_platform_driver,
237 #endif
238 dispc_uninit_platform_driver,
239 dss_uninit_platform_driver,
240 };
241
omap_dss_init(void)242 static int __init omap_dss_init(void)
243 {
244 int r;
245 int i;
246
247 r = platform_driver_probe(&omap_dss_driver, omap_dss_probe);
248 if (r)
249 return r;
250
251 for (i = 0; i < ARRAY_SIZE(dss_output_drv_reg_funcs); ++i) {
252 r = dss_output_drv_reg_funcs[i]();
253 if (r)
254 goto err_reg;
255 }
256
257 return 0;
258
259 err_reg:
260 for (i = ARRAY_SIZE(dss_output_drv_reg_funcs) - i;
261 i < ARRAY_SIZE(dss_output_drv_reg_funcs);
262 ++i)
263 dss_output_drv_unreg_funcs[i]();
264
265 platform_driver_unregister(&omap_dss_driver);
266
267 return r;
268 }
269
omap_dss_exit(void)270 static void __exit omap_dss_exit(void)
271 {
272 int i;
273
274 for (i = 0; i < ARRAY_SIZE(dss_output_drv_unreg_funcs); ++i)
275 dss_output_drv_unreg_funcs[i]();
276
277 platform_driver_unregister(&omap_dss_driver);
278 }
279
280 module_init(omap_dss_init);
281 module_exit(omap_dss_exit);
282
283 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@nokia.com>");
284 MODULE_DESCRIPTION("OMAP2/3 Display Subsystem");
285 MODULE_LICENSE("GPL v2");
286
287