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