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
32static struct {
33	struct platform_device *pdev;
34
35	const char *default_display_name;
36} core;
37
38static char *def_disp_name;
39module_param_named(def_disp, def_disp_name, charp, 0);
40MODULE_PARM_DESC(def_disp, "default display name");
41
42const char *omapdss_get_default_display_name(void)
43{
44	return core.default_display_name;
45}
46EXPORT_SYMBOL(omapdss_get_default_display_name);
47
48enum omapdss_version omapdss_get_version(void)
49{
50	struct omap_dss_board_info *pdata = core.pdev->dev.platform_data;
51	return pdata->version;
52}
53EXPORT_SYMBOL(omapdss_get_version);
54
55struct platform_device *dss_get_core_pdev(void)
56{
57	return core.pdev;
58}
59
60int 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
70void 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
80int 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)
91static 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
98DEFINE_SHOW_ATTRIBUTE(dss);
99
100static struct dentry *dss_debugfs_dir;
101
102static 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
110static void dss_uninitialize_debugfs(void)
111{
112	debugfs_remove_recursive(dss_debugfs_dir);
113}
114
115void 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 */
120static inline void dss_initialize_debugfs(void)
121{
122}
123static inline void dss_uninitialize_debugfs(void)
124{
125}
126void 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 */
132static 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
154static struct notifier_block omap_dss_pm_notif_block = {
155	.notifier_call = omap_dss_pm_notif,
156};
157
158static 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
174static 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
181static void omap_dss_shutdown(struct platform_device *pdev)
182{
183	DSSDBG("shutdown\n");
184	dss_disable_all_devices();
185}
186
187static 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 */
196static 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
219static 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
242static 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
259err_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
270static 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
280module_init(omap_dss_init);
281module_exit(omap_dss_exit);
282
283MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@nokia.com>");
284MODULE_DESCRIPTION("OMAP2/3 Display Subsystem");
285MODULE_LICENSE("GPL v2");
286
287