drivers/video/omap2/displays/panel-generic-dpi.c

   1 /*
   2  * Generic DPI Panels support
   3  *
   4  * Copyright (C) 2010 Canonical Ltd.
   5  * Author: Bryan Wu <bryan.wu@canonical.com>
   6  *
   7  * LCD panel driver for Sharp LQ043T1DG01
   8  *
   9  * Copyright (C) 2009 Texas Instruments Inc
  10  * Author: Vaibhav Hiremath <hvaibhav@ti.com>
  11  *
  12  * LCD panel driver for Toppoly TDO35S
  13  *
  14  * Copyright (C) 2009 CompuLab, Ltd.
  15  * Author: Mike Rapoport <mike@compulab.co.il>
  16  *
  17  * Copyright (C) 2008 Nokia Corporation
  18  * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
  19  *
  20  * This program is free software; you can redistribute it and/or modify it
  21  * under the terms of the GNU General Public License version 2 as published by
  22  * the Free Software Foundation.
  23  *
  24  * This program is distributed in the hope that it will be useful, but WITHOUT
  25  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  26  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  27  * more details.
  28  *
  29  * You should have received a copy of the GNU General Public License along with
  30  * this program.  If not, see <http://www.gnu.org/licenses/>.
  31  */
  32
  33 #include <linux/module.h>
  34 #include <linux/delay.h>
  35 #include <linux/slab.h>
  36
  37 #include <plat/panel-generic-dpi.h>
  38
  39 struct panel_config {
  40         struct omap_video_timings timings;
  41
  42         int acbi;       /* ac-bias pin transitions per interrupt */
  43         /* Unit: line clocks */
  44         int acb;        /* ac-bias pin frequency */
  45
  46         enum omap_panel_config config;
  47
  48         int power_on_delay;
  49         int power_off_delay;
  50
  51         /*
  52          * Used to match device to panel configuration
  53          * when use generic panel driver
  54          */
  55         const char *name;
  56 };
  57
  58 /* Panel configurations */
  59 static struct panel_config generic_dpi_panels[] = {
  60         /* Generic Panel */
  61         {
  62                 {
  63                         .x_res          = 640,
  64                         .y_res          = 480,
  65
  66                         .pixel_clock    = 23500,
  67
  68                         .hfp            = 48,
  69                         .hsw            = 32,
  70                         .hbp            = 80,
  71
  72                         .vfp            = 3,
  73                         .vsw            = 4,
  74                         .vbp            = 7,
  75                 },
  76                 .acbi                   = 0x0,
  77                 .acb                    = 0x0,
  78                 .config                 = OMAP_DSS_LCD_TFT,
  79                 .power_on_delay         = 0,
  80                 .power_off_delay        = 0,
  81                 .name                   = "generic",
  82         },
  83
  84         /* Sharp LQ043T1DG01 */
  85         {
  86                 {
  87                         .x_res          = 480,
  88                         .y_res          = 272,
  89
  90                         .pixel_clock    = 9000,
  91
  92                         .hsw            = 42,
  93                         .hfp            = 3,
  94                         .hbp            = 2,
  95
  96                         .vsw            = 11,
  97                         .vfp            = 3,
  98                         .vbp            = 2,
  99                 },
 100                 .acbi                   = 0x0,
 101                 .acb                    = 0x0,
 102                 .config                 = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS |
 103                                         OMAP_DSS_LCD_IHS | OMAP_DSS_LCD_IEO,
 104                 .power_on_delay         = 50,
 105                 .power_off_delay        = 100,
 106                 .name                   = "sharp_lq",
 107         },
 108
 109         /* Sharp LS037V7DW01 */
 110         {
 111                 {
 112                         .x_res          = 480,
 113                         .y_res          = 640,
 114
 115                         .pixel_clock    = 19200,
 116
 117                         .hsw            = 2,
 118                         .hfp            = 1,
 119                         .hbp            = 28,
 120
 121                         .vsw            = 1,
 122                         .vfp            = 1,
 123                         .vbp            = 1,
 124                 },
 125                 .acbi                   = 0x0,
 126                 .acb                    = 0x28,
 127                 .config                 = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS |
 128                                                 OMAP_DSS_LCD_IHS,
 129                 .power_on_delay         = 50,
 130                 .power_off_delay        = 100,
 131                 .name                   = "sharp_ls",
 132         },
 133
 134         /* Toppoly TDO35S */
 135         {
 136                 {
 137                         .x_res          = 480,
 138                         .y_res          = 640,
 139
 140                         .pixel_clock    = 26000,
 141
 142                         .hfp            = 104,
 143                         .hsw            = 8,
 144                         .hbp            = 8,
 145
 146                         .vfp            = 4,
 147                         .vsw            = 2,
 148                         .vbp            = 2,
 149                 },
 150                 .acbi                   = 0x0,
 151                 .acb                    = 0x0,
 152                 .config                 = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS |
 153                                         OMAP_DSS_LCD_IHS | OMAP_DSS_LCD_IPC |
 154                                         OMAP_DSS_LCD_ONOFF,
 155                 .power_on_delay         = 0,
 156                 .power_off_delay        = 0,
 157                 .name                   = "toppoly_tdo35s",
 158         },
 159 };
 160
 161 struct panel_drv_data {
 162
 163         struct omap_dss_device *dssdev;
 164
 165         struct panel_config *panel_config;
 166 };
 167
 168 static inline struct panel_generic_dpi_data
 169 *get_panel_data(const struct omap_dss_device *dssdev)
 170 {
 171         return (struct panel_generic_dpi_data *) dssdev->data;
 172 }
 173
 174 static int generic_dpi_panel_power_on(struct omap_dss_device *dssdev)
 175 {
 176         int r;
 177         struct panel_generic_dpi_data *panel_data = get_panel_data(dssdev);
 178         struct panel_drv_data *drv_data = dev_get_drvdata(&dssdev->dev);
 179         struct panel_config *panel_config = drv_data->panel_config;
 180
 181         if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
 182                 return 0;
 183
 184         r = omapdss_dpi_display_enable(dssdev);
 185         if (r)
 186                 goto err0;
 187
 188         /* wait couple of vsyncs until enabling the LCD */
 189         if (panel_config->power_on_delay)
 190                 msleep(panel_config->power_on_delay);
 191
 192         if (panel_data->platform_enable) {
 193                 r = panel_data->platform_enable(dssdev);
 194                 if (r)
 195                         goto err1;
 196         }
 197
 198         return 0;
 199 err1:
 200         omapdss_dpi_display_disable(dssdev);
 201 err0:
 202         return r;
 203 }
 204
 205 static void generic_dpi_panel_power_off(struct omap_dss_device *dssdev)
 206 {
 207         struct panel_generic_dpi_data *panel_data = get_panel_data(dssdev);
 208         struct panel_drv_data *drv_data = dev_get_drvdata(&dssdev->dev);
 209         struct panel_config *panel_config = drv_data->panel_config;
 210
 211         if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
 212                 return;
 213
 214         if (panel_data->platform_disable)
 215                 panel_data->platform_disable(dssdev);
 216
 217         /* wait couple of vsyncs after disabling the LCD */
 218         if (panel_config->power_off_delay)
 219                 msleep(panel_config->power_off_delay);
 220
 221         omapdss_dpi_display_disable(dssdev);
 222 }
 223
 224 static int generic_dpi_panel_probe(struct omap_dss_device *dssdev)
 225 {
 226         struct panel_generic_dpi_data *panel_data = get_panel_data(dssdev);
 227         struct panel_config *panel_config = NULL;
 228         struct panel_drv_data *drv_data = NULL;
 229         int i;
 230
 231         dev_dbg(&dssdev->dev, "probe\n");
 232
 233         if (!panel_data || !panel_data->name)
 234                 return -EINVAL;
 235
 236         for (i = 0; i < ARRAY_SIZE(generic_dpi_panels); i++) {
 237                 if (strcmp(panel_data->name, generic_dpi_panels[i].name) == 0) {
 238                         panel_config = &generic_dpi_panels[i];
 239                         break;
 240                 }
 241         }
 242
 243         if (!panel_config)
 244                 return -EINVAL;
 245
 246         dssdev->panel.config = panel_config->config;
 247         dssdev->panel.timings = panel_config->timings;
 248         dssdev->panel.acb = panel_config->acb;
 249         dssdev->panel.acbi = panel_config->acbi;
 250
 251         drv_data = kzalloc(sizeof(*drv_data), GFP_KERNEL);
 252         if (!drv_data)
 253                 return -ENOMEM;
 254
 255         drv_data->dssdev = dssdev;
 256         drv_data->panel_config = panel_config;
 257
 258         dev_set_drvdata(&dssdev->dev, drv_data);
 259
 260         return 0;
 261 }
 262
 263 static void generic_dpi_panel_remove(struct omap_dss_device *dssdev)
 264 {
 265         struct panel_drv_data *drv_data = dev_get_drvdata(&dssdev->dev);
 266
 267         dev_dbg(&dssdev->dev, "remove\n");
 268
 269         kfree(drv_data);
 270
 271         dev_set_drvdata(&dssdev->dev, NULL);
 272 }
 273
 274 static int generic_dpi_panel_enable(struct omap_dss_device *dssdev)
 275 {
 276         int r = 0;
 277
 278         r = generic_dpi_panel_power_on(dssdev);
 279         if (r)
 280                 return r;
 281
 282         dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
 283
 284         return 0;
 285 }
 286
 287 static void generic_dpi_panel_disable(struct omap_dss_device *dssdev)
 288 {
 289         generic_dpi_panel_power_off(dssdev);
 290
 291         dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
 292 }
 293
 294 static int generic_dpi_panel_suspend(struct omap_dss_device *dssdev)
 295 {
 296         generic_dpi_panel_power_off(dssdev);
 297
 298         dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
 299
 300         return 0;
 301 }
 302
 303 static int generic_dpi_panel_resume(struct omap_dss_device *dssdev)
 304 {
 305         int r = 0;
 306
 307         r = generic_dpi_panel_power_on(dssdev);
 308         if (r)
 309                 return r;
 310
 311         dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
 312
 313         return 0;
 314 }
 315
 316 static void generic_dpi_panel_set_timings(struct omap_dss_device *dssdev,
 317                 struct omap_video_timings *timings)
 318 {
 319         dpi_set_timings(dssdev, timings);
 320 }
 321
 322 static void generic_dpi_panel_get_timings(struct omap_dss_device *dssdev,
 323                 struct omap_video_timings *timings)
 324 {
 325         *timings = dssdev->panel.timings;
 326 }
 327
 328 static int generic_dpi_panel_check_timings(struct omap_dss_device *dssdev,
 329                 struct omap_video_timings *timings)
 330 {
 331         return dpi_check_timings(dssdev, timings);
 332 }
 333
 334 static struct omap_dss_driver dpi_driver = {
 335         .probe          = generic_dpi_panel_probe,
 336         .remove         = generic_dpi_panel_remove,
 337
 338         .enable         = generic_dpi_panel_enable,
 339         .disable        = generic_dpi_panel_disable,
 340         .suspend        = generic_dpi_panel_suspend,
 341         .resume         = generic_dpi_panel_resume,
 342
 343         .set_timings    = generic_dpi_panel_set_timings,
 344         .get_timings    = generic_dpi_panel_get_timings,
 345         .check_timings  = generic_dpi_panel_check_timings,
 346
 347         .driver         = {
 348                 .name   = "generic_dpi_panel",
 349                 .owner  = THIS_MODULE,
 350         },
 351 };
 352
 353 static int __init generic_dpi_panel_drv_init(void)
 354 {
 355         return omap_dss_register_driver(&dpi_driver);
 356 }
 357
 358 static void __exit generic_dpi_panel_drv_exit(void)
 359 {
 360         omap_dss_unregister_driver(&dpi_driver);
 361 }
 362
 363 module_init(generic_dpi_panel_drv_init);
 364 module_exit(generic_dpi_panel_drv_exit);
 365 MODULE_LICENSE("GPL");