drivers/video/fbdev/omap2/dss/display-sysfs.c

   1 /*
   2  * Copyright (C) 2009 Nokia Corporation
   3  * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
   4  *
   5  * Some code and ideas taken from drivers/video/omap/ driver
   6  * by Imre Deak.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License version 2 as published by
  10  * the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program.  If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #define DSS_SUBSYS_NAME "DISPLAY"
  22
  23 #include <linux/kernel.h>
  24 #include <linux/module.h>
  25 #include <linux/platform_device.h>
  26 #include <linux/sysfs.h>
  27
  28 #include <video/omapdss.h>
  29 #include "dss.h"
  30
  31 static ssize_t display_name_show(struct omap_dss_device *dssdev, char *buf)
  32 {
  33         return snprintf(buf, PAGE_SIZE, "%s\n",
  34                         dssdev->name ?
  35                         dssdev->name : "");
  36 }
  37
  38 static ssize_t display_enabled_show(struct omap_dss_device *dssdev, char *buf)
  39 {
  40         return snprintf(buf, PAGE_SIZE, "%d\n",
  41                         omapdss_device_is_enabled(dssdev));
  42 }
  43
  44 static ssize_t display_enabled_store(struct omap_dss_device *dssdev,
  45                 const char *buf, size_t size)
  46 {
  47         int r;
  48         bool enable;
  49
  50         r = strtobool(buf, &enable);
  51         if (r)
  52                 return r;
  53
  54         if (enable == omapdss_device_is_enabled(dssdev))
  55                 return size;
  56
  57         if (omapdss_device_is_connected(dssdev) == false)
  58                 return -ENODEV;
  59
  60         if (enable) {
  61                 r = dssdev->driver->enable(dssdev);
  62                 if (r)
  63                         return r;
  64         } else {
  65                 dssdev->driver->disable(dssdev);
  66         }
  67
  68         return size;
  69 }
  70
  71 static ssize_t display_tear_show(struct omap_dss_device *dssdev, char *buf)
  72 {
  73         return snprintf(buf, PAGE_SIZE, "%d\n",
  74                         dssdev->driver->get_te ?
  75                         dssdev->driver->get_te(dssdev) : 0);
  76 }
  77
  78 static ssize_t display_tear_store(struct omap_dss_device *dssdev,
  79         const char *buf, size_t size)
  80 {
  81         int r;
  82         bool te;
  83
  84         if (!dssdev->driver->enable_te || !dssdev->driver->get_te)
  85                 return -ENOENT;
  86
  87         r = strtobool(buf, &te);
  88         if (r)
  89                 return r;
  90
  91         r = dssdev->driver->enable_te(dssdev, te);
  92         if (r)
  93                 return r;
  94
  95         return size;
  96 }
  97
  98 static ssize_t display_timings_show(struct omap_dss_device *dssdev, char *buf)
  99 {
 100         struct omap_video_timings t;
 101
 102         if (!dssdev->driver->get_timings)
 103                 return -ENOENT;
 104
 105         dssdev->driver->get_timings(dssdev, &t);
 106
 107         return snprintf(buf, PAGE_SIZE, "%u,%u/%u/%u/%u,%u/%u/%u/%u\n",
 108                         t.pixelclock,
 109                         t.x_res, t.hfp, t.hbp, t.hsw,
 110                         t.y_res, t.vfp, t.vbp, t.vsw);
 111 }
 112
 113 static ssize_t display_timings_store(struct omap_dss_device *dssdev,
 114         const char *buf, size_t size)
 115 {
 116         struct omap_video_timings t = dssdev->panel.timings;
 117         int r, found;
 118
 119         if (!dssdev->driver->set_timings || !dssdev->driver->check_timings)
 120                 return -ENOENT;
 121
 122         found = 0;
 123 #ifdef CONFIG_OMAP2_DSS_VENC
 124         if (strncmp("pal", buf, 3) == 0) {
 125                 t = omap_dss_pal_timings;
 126                 found = 1;
 127         } else if (strncmp("ntsc", buf, 4) == 0) {
 128                 t = omap_dss_ntsc_timings;
 129                 found = 1;
 130         }
 131 #endif
 132         if (!found && sscanf(buf, "%u,%hu/%hu/%hu/%hu,%hu/%hu/%hu/%hu",
 133                                 &t.pixelclock,
 134                                 &t.x_res, &t.hfp, &t.hbp, &t.hsw,
 135                                 &t.y_res, &t.vfp, &t.vbp, &t.vsw) != 9)
 136                 return -EINVAL;
 137
 138         r = dssdev->driver->check_timings(dssdev, &t);
 139         if (r)
 140                 return r;
 141
 142         dssdev->driver->disable(dssdev);
 143         dssdev->driver->set_timings(dssdev, &t);
 144         r = dssdev->driver->enable(dssdev);
 145         if (r)
 146                 return r;
 147
 148         return size;
 149 }
 150
 151 static ssize_t display_rotate_show(struct omap_dss_device *dssdev, char *buf)
 152 {
 153         int rotate;
 154         if (!dssdev->driver->get_rotate)
 155                 return -ENOENT;
 156         rotate = dssdev->driver->get_rotate(dssdev);
 157         return snprintf(buf, PAGE_SIZE, "%u\n", rotate);
 158 }
 159
 160 static ssize_t display_rotate_store(struct omap_dss_device *dssdev,
 161         const char *buf, size_t size)
 162 {
 163         int rot, r;
 164
 165         if (!dssdev->driver->set_rotate || !dssdev->driver->get_rotate)
 166                 return -ENOENT;
 167
 168         r = kstrtoint(buf, 0, &rot);
 169         if (r)
 170                 return r;
 171
 172         r = dssdev->driver->set_rotate(dssdev, rot);
 173         if (r)
 174                 return r;
 175
 176         return size;
 177 }
 178
 179 static ssize_t display_mirror_show(struct omap_dss_device *dssdev, char *buf)
 180 {
 181         int mirror;
 182         if (!dssdev->driver->get_mirror)
 183                 return -ENOENT;
 184         mirror = dssdev->driver->get_mirror(dssdev);
 185         return snprintf(buf, PAGE_SIZE, "%u\n", mirror);
 186 }
 187
 188 static ssize_t display_mirror_store(struct omap_dss_device *dssdev,
 189         const char *buf, size_t size)
 190 {
 191         int r;
 192         bool mirror;
 193
 194         if (!dssdev->driver->set_mirror || !dssdev->driver->get_mirror)
 195                 return -ENOENT;
 196
 197         r = strtobool(buf, &mirror);
 198         if (r)
 199                 return r;
 200
 201         r = dssdev->driver->set_mirror(dssdev, mirror);
 202         if (r)
 203                 return r;
 204
 205         return size;
 206 }
 207
 208 static ssize_t display_wss_show(struct omap_dss_device *dssdev, char *buf)
 209 {
 210         unsigned int wss;
 211
 212         if (!dssdev->driver->get_wss)
 213                 return -ENOENT;
 214
 215         wss = dssdev->driver->get_wss(dssdev);
 216
 217         return snprintf(buf, PAGE_SIZE, "0x%05x\n", wss);
 218 }
 219
 220 static ssize_t display_wss_store(struct omap_dss_device *dssdev,
 221         const char *buf, size_t size)
 222 {
 223         u32 wss;
 224         int r;
 225
 226         if (!dssdev->driver->get_wss || !dssdev->driver->set_wss)
 227                 return -ENOENT;
 228
 229         r = kstrtou32(buf, 0, &wss);
 230         if (r)
 231                 return r;
 232
 233         if (wss > 0xfffff)
 234                 return -EINVAL;
 235
 236         r = dssdev->driver->set_wss(dssdev, wss);
 237         if (r)
 238                 return r;
 239
 240         return size;
 241 }
 242
 243 struct display_attribute {
 244         struct attribute attr;
 245         ssize_t (*show)(struct omap_dss_device *, char *);
 246         ssize_t (*store)(struct omap_dss_device *, const char *, size_t);
 247 };
 248
 249 #define DISPLAY_ATTR(_name, _mode, _show, _store) \
 250         struct display_attribute display_attr_##_name = \
 251         __ATTR(_name, _mode, _show, _store)
 252
 253 static DISPLAY_ATTR(name, S_IRUGO, display_name_show, NULL);
 254 static DISPLAY_ATTR(display_name, S_IRUGO, display_name_show, NULL);
 255 static DISPLAY_ATTR(enabled, S_IRUGO|S_IWUSR,
 256                 display_enabled_show, display_enabled_store);
 257 static DISPLAY_ATTR(tear_elim, S_IRUGO|S_IWUSR,
 258                 display_tear_show, display_tear_store);
 259 static DISPLAY_ATTR(timings, S_IRUGO|S_IWUSR,
 260                 display_timings_show, display_timings_store);
 261 static DISPLAY_ATTR(rotate, S_IRUGO|S_IWUSR,
 262                 display_rotate_show, display_rotate_store);
 263 static DISPLAY_ATTR(mirror, S_IRUGO|S_IWUSR,
 264                 display_mirror_show, display_mirror_store);
 265 static DISPLAY_ATTR(wss, S_IRUGO|S_IWUSR,
 266                 display_wss_show, display_wss_store);
 267
 268 static struct attribute *display_sysfs_attrs[] = {
 269         &display_attr_name.attr,
 270         &display_attr_display_name.attr,
 271         &display_attr_enabled.attr,
 272         &display_attr_tear_elim.attr,
 273         &display_attr_timings.attr,
 274         &display_attr_rotate.attr,
 275         &display_attr_mirror.attr,
 276         &display_attr_wss.attr,
 277         NULL
 278 };
 279
 280 static ssize_t display_attr_show(struct kobject *kobj, struct attribute *attr,
 281                 char *buf)
 282 {
 283         struct omap_dss_device *dssdev;
 284         struct display_attribute *display_attr;
 285
 286         dssdev = container_of(kobj, struct omap_dss_device, kobj);
 287         display_attr = container_of(attr, struct display_attribute, attr);
 288
 289         if (!display_attr->show)
 290                 return -ENOENT;
 291
 292         return display_attr->show(dssdev, buf);
 293 }
 294
 295 static ssize_t display_attr_store(struct kobject *kobj, struct attribute *attr,
 296                 const char *buf, size_t size)
 297 {
 298         struct omap_dss_device *dssdev;
 299         struct display_attribute *display_attr;
 300
 301         dssdev = container_of(kobj, struct omap_dss_device, kobj);
 302         display_attr = container_of(attr, struct display_attribute, attr);
 303
 304         if (!display_attr->store)
 305                 return -ENOENT;
 306
 307         return display_attr->store(dssdev, buf, size);
 308 }
 309
 310 static const struct sysfs_ops display_sysfs_ops = {
 311         .show = display_attr_show,
 312         .store = display_attr_store,
 313 };
 314
 315 static struct kobj_type display_ktype = {
 316         .sysfs_ops = &display_sysfs_ops,
 317         .default_attrs = display_sysfs_attrs,
 318 };
 319
 320 int display_init_sysfs(struct platform_device *pdev)
 321 {
 322         struct omap_dss_device *dssdev = NULL;
 323         int r;
 324
 325         for_each_dss_dev(dssdev) {
 326                 r = kobject_init_and_add(&dssdev->kobj, &display_ktype,
 327                         &pdev->dev.kobj, dssdev->alias);
 328                 if (r) {
 329                         DSSERR("failed to create sysfs files\n");
 330                         omap_dss_put_device(dssdev);
 331                         goto err;
 332                 }
 333         }
 334
 335         return 0;
 336
 337 err:
 338         display_uninit_sysfs(pdev);
 339
 340         return r;
 341 }
 342
 343 void display_uninit_sysfs(struct platform_device *pdev)
 344 {
 345         struct omap_dss_device *dssdev = NULL;
 346
 347         for_each_dss_dev(dssdev) {
 348                 if (kobject_name(&dssdev->kobj) == NULL)
 349                         continue;
 350
 351                 kobject_del(&dssdev->kobj);
 352                 kobject_put(&dssdev->kobj);
 353
 354                 memset(&dssdev->kobj, 0, sizeof(dssdev->kobj));
 355         }
 356 }