drivers/gpu/drm/omapdrm/dss/core.c

   1 /*
   2  * linux/drivers/video/omap2/dss/core.c
   3  *
   4  * Copyright (C) 2009 Nokia Corporation
   5  * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
   6  *
   7  * Some code and ideas taken from drivers/video/omap/ driver
   8  * by Imre Deak.
   9  *
  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.
  13  *
  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
  17  * more details.
  18  *
  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/>.
  21  */
  22
  23 #define DSS_SUBSYS_NAME "CORE"
  24
  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>
  32 #include <linux/io.h>
  33 #include <linux/device.h>
  34 #include <linux/regulator/consumer.h>
  35 #include <linux/suspend.h>
  36 #include <linux/slab.h>
  37
  38 #include "omapdss.h"
  39 #include "dss.h"
  40 #include "dss_features.h"
  41
  42 static struct {
  43         struct platform_device *pdev;
  44
  45         const char *default_display_name;
  46 } core;
  47
  48 static char *def_disp_name;
  49 module_param_named(def_disp, def_disp_name, charp, 0);
  50 MODULE_PARM_DESC(def_disp, "default display name");
  51
  52 const char *omapdss_get_default_display_name(void)
  53 {
  54         return core.default_display_name;
  55 }
  56 EXPORT_SYMBOL(omapdss_get_default_display_name);
  57
  58 enum omapdss_version omapdss_get_version(void)
  59 {
  60         struct omap_dss_board_info *pdata = core.pdev->dev.platform_data;
  61         return pdata->version;
  62 }
  63 EXPORT_SYMBOL(omapdss_get_version);
  64
  65 struct platform_device *dss_get_core_pdev(void)
  66 {
  67         return core.pdev;
  68 }
  69
  70 int dss_dsi_enable_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_enable_pads)
  75                 return -ENOENT;
  76
  77         return board_data->dsi_enable_pads(dsi_id, lane_mask);
  78 }
  79
  80 void dss_dsi_disable_pads(int dsi_id, unsigned lane_mask)
  81 {
  82         struct omap_dss_board_info *board_data = core.pdev->dev.platform_data;
  83
  84         if (!board_data->dsi_disable_pads)
  85                 return;
  86
  87         return board_data->dsi_disable_pads(dsi_id, lane_mask);
  88 }
  89
  90 int dss_set_min_bus_tput(struct device *dev, unsigned long tput)
  91 {
  92         struct omap_dss_board_info *pdata = core.pdev->dev.platform_data;
  93
  94         if (pdata->set_min_bus_tput)
  95                 return pdata->set_min_bus_tput(dev, tput);
  96         else
  97                 return 0;
  98 }
  99
 100 #if defined(CONFIG_OMAP2_DSS_DEBUGFS)
 101 static int dss_debug_show(struct seq_file *s, void *unused)
 102 {
 103         void (*func)(struct seq_file *) = s->private;
 104         func(s);
 105         return 0;
 106 }
 107
 108 static int dss_debug_open(struct inode *inode, struct file *file)
 109 {
 110         return single_open(file, dss_debug_show, inode->i_private);
 111 }
 112
 113 static const struct file_operations dss_debug_fops = {
 114         .open           = dss_debug_open,
 115         .read           = seq_read,
 116         .llseek         = seq_lseek,
 117         .release        = single_release,
 118 };
 119
 120 static struct dentry *dss_debugfs_dir;
 121
 122 static int dss_initialize_debugfs(void)
 123 {
 124         dss_debugfs_dir = debugfs_create_dir("omapdss", NULL);
 125         if (IS_ERR(dss_debugfs_dir)) {
 126                 int err = PTR_ERR(dss_debugfs_dir);
 127                 dss_debugfs_dir = NULL;
 128                 return err;
 129         }
 130
 131         debugfs_create_file("clk", S_IRUGO, dss_debugfs_dir,
 132                         &dss_debug_dump_clocks, &dss_debug_fops);
 133
 134         return 0;
 135 }
 136
 137 static void dss_uninitialize_debugfs(void)
 138 {
 139         if (dss_debugfs_dir)
 140                 debugfs_remove_recursive(dss_debugfs_dir);
 141 }
 142
 143 int dss_debugfs_create_file(const char *name, void (*write)(struct seq_file *))
 144 {
 145         struct dentry *d;
 146
 147         d = debugfs_create_file(name, S_IRUGO, dss_debugfs_dir,
 148                         write, &dss_debug_fops);
 149
 150         return PTR_ERR_OR_ZERO(d);
 151 }
 152 #else /* CONFIG_OMAP2_DSS_DEBUGFS */
 153 static inline int dss_initialize_debugfs(void)
 154 {
 155         return 0;
 156 }
 157 static inline void dss_uninitialize_debugfs(void)
 158 {
 159 }
 160 int dss_debugfs_create_file(const char *name, void (*write)(struct seq_file *))
 161 {
 162         return 0;
 163 }
 164 #endif /* CONFIG_OMAP2_DSS_DEBUGFS */
 165
 166 /* PLATFORM DEVICE */
 167
 168 static void dss_disable_all_devices(void)
 169 {
 170         struct omap_dss_device *dssdev = NULL;
 171
 172         for_each_dss_dev(dssdev) {
 173                 if (!dssdev->driver)
 174                         continue;
 175
 176                 if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
 177                         dssdev->driver->disable(dssdev);
 178         }
 179 }
 180
 181 static int __init omap_dss_probe(struct platform_device *pdev)
 182 {
 183         struct omap_dss_board_info *pdata = pdev->dev.platform_data;
 184         int r;
 185
 186         core.pdev = pdev;
 187
 188         dss_features_init(omapdss_get_version());
 189
 190         r = dss_initialize_debugfs();
 191         if (r)
 192                 goto err_debugfs;
 193
 194         if (def_disp_name)
 195                 core.default_display_name = def_disp_name;
 196         else if (pdata->default_display_name)
 197                 core.default_display_name = pdata->default_display_name;
 198
 199         return 0;
 200
 201 err_debugfs:
 202
 203         return r;
 204 }
 205
 206 static int omap_dss_remove(struct platform_device *pdev)
 207 {
 208         dss_uninitialize_debugfs();
 209
 210         return 0;
 211 }
 212
 213 static void omap_dss_shutdown(struct platform_device *pdev)
 214 {
 215         DSSDBG("shutdown\n");
 216         dss_disable_all_devices();
 217 }
 218
 219 static struct platform_driver omap_dss_driver = {
 220         .remove         = omap_dss_remove,
 221         .shutdown       = omap_dss_shutdown,
 222         .driver         = {
 223                 .name   = "omapdss",
 224         },
 225 };
 226
 227 /* INIT */
 228 static int (*dss_output_drv_reg_funcs[])(void) __initdata = {
 229         dss_init_platform_driver,
 230         dispc_init_platform_driver,
 231 #ifdef CONFIG_OMAP2_DSS_DSI
 232         dsi_init_platform_driver,
 233 #endif
 234 #ifdef CONFIG_OMAP2_DSS_DPI
 235         dpi_init_platform_driver,
 236 #endif
 237 #ifdef CONFIG_OMAP2_DSS_SDI
 238         sdi_init_platform_driver,
 239 #endif
 240 #ifdef CONFIG_OMAP2_DSS_RFBI
 241         rfbi_init_platform_driver,
 242 #endif
 243 #ifdef CONFIG_OMAP2_DSS_VENC
 244         venc_init_platform_driver,
 245 #endif
 246 #ifdef CONFIG_OMAP4_DSS_HDMI
 247         hdmi4_init_platform_driver,
 248 #endif
 249 #ifdef CONFIG_OMAP5_DSS_HDMI
 250         hdmi5_init_platform_driver,
 251 #endif
 252 };
 253
 254 static void (*dss_output_drv_unreg_funcs[])(void) = {
 255 #ifdef CONFIG_OMAP5_DSS_HDMI
 256         hdmi5_uninit_platform_driver,
 257 #endif
 258 #ifdef CONFIG_OMAP4_DSS_HDMI
 259         hdmi4_uninit_platform_driver,
 260 #endif
 261 #ifdef CONFIG_OMAP2_DSS_VENC
 262         venc_uninit_platform_driver,
 263 #endif
 264 #ifdef CONFIG_OMAP2_DSS_RFBI
 265         rfbi_uninit_platform_driver,
 266 #endif
 267 #ifdef CONFIG_OMAP2_DSS_SDI
 268         sdi_uninit_platform_driver,
 269 #endif
 270 #ifdef CONFIG_OMAP2_DSS_DPI
 271         dpi_uninit_platform_driver,
 272 #endif
 273 #ifdef CONFIG_OMAP2_DSS_DSI
 274         dsi_uninit_platform_driver,
 275 #endif
 276         dispc_uninit_platform_driver,
 277         dss_uninit_platform_driver,
 278 };
 279
 280 static int __init omap_dss_init(void)
 281 {
 282         int r;
 283         int i;
 284
 285         r = platform_driver_probe(&omap_dss_driver, omap_dss_probe);
 286         if (r)
 287                 return r;
 288
 289         for (i = 0; i < ARRAY_SIZE(dss_output_drv_reg_funcs); ++i) {
 290                 r = dss_output_drv_reg_funcs[i]();
 291                 if (r)
 292                         goto err_reg;
 293         }
 294
 295         return 0;
 296
 297 err_reg:
 298         for (i = ARRAY_SIZE(dss_output_drv_reg_funcs) - i;
 299                         i < ARRAY_SIZE(dss_output_drv_reg_funcs);
 300                         ++i)
 301                 dss_output_drv_unreg_funcs[i]();
 302
 303         platform_driver_unregister(&omap_dss_driver);
 304
 305         return r;
 306 }
 307
 308 static void __exit omap_dss_exit(void)
 309 {
 310         int i;
 311
 312         for (i = 0; i < ARRAY_SIZE(dss_output_drv_unreg_funcs); ++i)
 313                 dss_output_drv_unreg_funcs[i]();
 314
 315         platform_driver_unregister(&omap_dss_driver);
 316 }
 317
 318 module_init(omap_dss_init);
 319 module_exit(omap_dss_exit);
 320
 321 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@nokia.com>");
 322 MODULE_DESCRIPTION("OMAP2/3 Display Subsystem");
 323 MODULE_LICENSE("GPL v2");
 324