drivers/video/fbdev/omap2/omapfb/dss/core.c

   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
  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
  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
  55 struct platform_device *dss_get_core_pdev(void)
  56 {
  57         return core.pdev;
  58 }
  59
  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
  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
  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)
  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
 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
 110 static void dss_uninitialize_debugfs(void)
 111 {
 112         debugfs_remove_recursive(dss_debugfs_dir);
 113 }
 114
 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 */
 120 static inline void dss_initialize_debugfs(void)
 121 {
 122 }
 123 static inline void dss_uninitialize_debugfs(void)
 124 {
 125 }
 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 */
 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
 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
 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
 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         = 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
 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
 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