drivers/video/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 struct omap_dss_device *to_dss_device_sysfs(struct device *dev)
  32 {
  33         struct omap_dss_device *dssdev = NULL;
  34
  35         for_each_dss_dev(dssdev) {
  36                 if (dssdev->dev == dev) {
  37                         omap_dss_put_device(dssdev);
  38                         return dssdev;
  39                 }
  40         }
  41
  42         return NULL;
  43 }
  44
  45 static ssize_t display_name_show(struct device *dev,
  46                 struct device_attribute *attr, char *buf)
  47 {
  48         struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
  49
  50         return snprintf(buf, PAGE_SIZE, "%s\n",
  51                         dssdev->name ?
  52                         dssdev->name : "");
  53 }
  54
  55 static ssize_t display_enabled_show(struct device *dev,
  56                 struct device_attribute *attr, char *buf)
  57 {
  58         struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
  59
  60         return snprintf(buf, PAGE_SIZE, "%d\n",
  61                         omapdss_device_is_enabled(dssdev));
  62 }
  63
  64 static ssize_t display_enabled_store(struct device *dev,
  65                 struct device_attribute *attr,
  66                 const char *buf, size_t size)
  67 {
  68         struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
  69         int r;
  70         bool enable;
  71
  72         r = strtobool(buf, &enable);
  73         if (r)
  74                 return r;
  75
  76         if (enable == omapdss_device_is_enabled(dssdev))
  77                 return size;
  78
  79         if (omapdss_device_is_connected(dssdev) == false)
  80                 return -ENODEV;
  81
  82         if (enable) {
  83                 r = dssdev->driver->enable(dssdev);
  84                 if (r)
  85                         return r;
  86         } else {
  87                 dssdev->driver->disable(dssdev);
  88         }
  89
  90         return size;
  91 }
  92
  93 static ssize_t display_tear_show(struct device *dev,
  94                 struct device_attribute *attr, char *buf)
  95 {
  96         struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
  97         return snprintf(buf, PAGE_SIZE, "%d\n",
  98                         dssdev->driver->get_te ?
  99                         dssdev->driver->get_te(dssdev) : 0);
 100 }
 101
 102 static ssize_t display_tear_store(struct device *dev,
 103                 struct device_attribute *attr, const char *buf, size_t size)
 104 {
 105         struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
 106         int r;
 107         bool te;
 108
 109         if (!dssdev->driver->enable_te || !dssdev->driver->get_te)
 110                 return -ENOENT;
 111
 112         r = strtobool(buf, &te);
 113         if (r)
 114                 return r;
 115
 116         r = dssdev->driver->enable_te(dssdev, te);
 117         if (r)
 118                 return r;
 119
 120         return size;
 121 }
 122
 123 static ssize_t display_timings_show(struct device *dev,
 124                 struct device_attribute *attr, char *buf)
 125 {
 126         struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
 127         struct omap_video_timings t;
 128
 129         if (!dssdev->driver->get_timings)
 130                 return -ENOENT;
 131
 132         dssdev->driver->get_timings(dssdev, &t);
 133
 134         return snprintf(buf, PAGE_SIZE, "%u,%u/%u/%u/%u,%u/%u/%u/%u\n",
 135                         t.pixel_clock,
 136                         t.x_res, t.hfp, t.hbp, t.hsw,
 137                         t.y_res, t.vfp, t.vbp, t.vsw);
 138 }
 139
 140 static ssize_t display_timings_store(struct device *dev,
 141                 struct device_attribute *attr, const char *buf, size_t size)
 142 {
 143         struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
 144         struct omap_video_timings t = dssdev->panel.timings;
 145         int r, found;
 146
 147         if (!dssdev->driver->set_timings || !dssdev->driver->check_timings)
 148                 return -ENOENT;
 149
 150         found = 0;
 151 #ifdef CONFIG_OMAP2_DSS_VENC
 152         if (strncmp("pal", buf, 3) == 0) {
 153                 t = omap_dss_pal_timings;
 154                 found = 1;
 155         } else if (strncmp("ntsc", buf, 4) == 0) {
 156                 t = omap_dss_ntsc_timings;
 157                 found = 1;
 158         }
 159 #endif
 160         if (!found && sscanf(buf, "%u,%hu/%hu/%hu/%hu,%hu/%hu/%hu/%hu",
 161                                 &t.pixel_clock,
 162                                 &t.x_res, &t.hfp, &t.hbp, &t.hsw,
 163                                 &t.y_res, &t.vfp, &t.vbp, &t.vsw) != 9)
 164                 return -EINVAL;
 165
 166         r = dssdev->driver->check_timings(dssdev, &t);
 167         if (r)
 168                 return r;
 169
 170         dssdev->driver->disable(dssdev);
 171         dssdev->driver->set_timings(dssdev, &t);
 172         r = dssdev->driver->enable(dssdev);
 173         if (r)
 174                 return r;
 175
 176         return size;
 177 }
 178
 179 static ssize_t display_rotate_show(struct device *dev,
 180                 struct device_attribute *attr, char *buf)
 181 {
 182         struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
 183         int rotate;
 184         if (!dssdev->driver->get_rotate)
 185                 return -ENOENT;
 186         rotate = dssdev->driver->get_rotate(dssdev);
 187         return snprintf(buf, PAGE_SIZE, "%u\n", rotate);
 188 }
 189
 190 static ssize_t display_rotate_store(struct device *dev,
 191                 struct device_attribute *attr, const char *buf, size_t size)
 192 {
 193         struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
 194         int rot, r;
 195
 196         if (!dssdev->driver->set_rotate || !dssdev->driver->get_rotate)
 197                 return -ENOENT;
 198
 199         r = kstrtoint(buf, 0, &rot);
 200         if (r)
 201                 return r;
 202
 203         r = dssdev->driver->set_rotate(dssdev, rot);
 204         if (r)
 205                 return r;
 206
 207         return size;
 208 }
 209
 210 static ssize_t display_mirror_show(struct device *dev,
 211                 struct device_attribute *attr, char *buf)
 212 {
 213         struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
 214         int mirror;
 215         if (!dssdev->driver->get_mirror)
 216                 return -ENOENT;
 217         mirror = dssdev->driver->get_mirror(dssdev);
 218         return snprintf(buf, PAGE_SIZE, "%u\n", mirror);
 219 }
 220
 221 static ssize_t display_mirror_store(struct device *dev,
 222                 struct device_attribute *attr, const char *buf, size_t size)
 223 {
 224         struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
 225         int r;
 226         bool mirror;
 227
 228         if (!dssdev->driver->set_mirror || !dssdev->driver->get_mirror)
 229                 return -ENOENT;
 230
 231         r = strtobool(buf, &mirror);
 232         if (r)
 233                 return r;
 234
 235         r = dssdev->driver->set_mirror(dssdev, mirror);
 236         if (r)
 237                 return r;
 238
 239         return size;
 240 }
 241
 242 static ssize_t display_wss_show(struct device *dev,
 243                 struct device_attribute *attr, char *buf)
 244 {
 245         struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
 246         unsigned int wss;
 247
 248         if (!dssdev->driver->get_wss)
 249                 return -ENOENT;
 250
 251         wss = dssdev->driver->get_wss(dssdev);
 252
 253         return snprintf(buf, PAGE_SIZE, "0x%05x\n", wss);
 254 }
 255
 256 static ssize_t display_wss_store(struct device *dev,
 257                 struct device_attribute *attr, const char *buf, size_t size)
 258 {
 259         struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
 260         u32 wss;
 261         int r;
 262
 263         if (!dssdev->driver->get_wss || !dssdev->driver->set_wss)
 264                 return -ENOENT;
 265
 266         r = kstrtou32(buf, 0, &wss);
 267         if (r)
 268                 return r;
 269
 270         if (wss > 0xfffff)
 271                 return -EINVAL;
 272
 273         r = dssdev->driver->set_wss(dssdev, wss);
 274         if (r)
 275                 return r;
 276
 277         return size;
 278 }
 279
 280 static DEVICE_ATTR(name, S_IRUGO, display_name_show, NULL);
 281 static DEVICE_ATTR(enabled, S_IRUGO|S_IWUSR,
 282                 display_enabled_show, display_enabled_store);
 283 static DEVICE_ATTR(tear_elim, S_IRUGO|S_IWUSR,
 284                 display_tear_show, display_tear_store);
 285 static DEVICE_ATTR(timings, S_IRUGO|S_IWUSR,
 286                 display_timings_show, display_timings_store);
 287 static DEVICE_ATTR(rotate, S_IRUGO|S_IWUSR,
 288                 display_rotate_show, display_rotate_store);
 289 static DEVICE_ATTR(mirror, S_IRUGO|S_IWUSR,
 290                 display_mirror_show, display_mirror_store);
 291 static DEVICE_ATTR(wss, S_IRUGO|S_IWUSR,
 292                 display_wss_show, display_wss_store);
 293
 294 static const struct attribute *display_sysfs_attrs[] = {
 295         &dev_attr_name.attr,
 296         &dev_attr_enabled.attr,
 297         &dev_attr_tear_elim.attr,
 298         &dev_attr_timings.attr,
 299         &dev_attr_rotate.attr,
 300         &dev_attr_mirror.attr,
 301         &dev_attr_wss.attr,
 302         NULL
 303 };
 304
 305 int display_init_sysfs(struct platform_device *pdev)
 306 {
 307         struct omap_dss_device *dssdev = NULL;
 308         int r;
 309
 310         for_each_dss_dev(dssdev) {
 311                 struct kobject *kobj = &dssdev->dev->kobj;
 312
 313                 r = sysfs_create_files(kobj, display_sysfs_attrs);
 314                 if (r) {
 315                         DSSERR("failed to create sysfs files\n");
 316                         goto err;
 317                 }
 318
 319                 r = sysfs_create_link(&pdev->dev.kobj, kobj, dssdev->alias);
 320                 if (r) {
 321                         sysfs_remove_files(kobj, display_sysfs_attrs);
 322
 323                         DSSERR("failed to create sysfs display link\n");
 324                         goto err;
 325                 }
 326         }
 327
 328         return 0;
 329
 330 err:
 331         display_uninit_sysfs(pdev);
 332
 333         return r;
 334 }
 335
 336 void display_uninit_sysfs(struct platform_device *pdev)
 337 {
 338         struct omap_dss_device *dssdev = NULL;
 339
 340         for_each_dss_dev(dssdev) {
 341                 sysfs_remove_link(&pdev->dev.kobj, dssdev->alias);
 342                 sysfs_remove_files(&dssdev->dev->kobj,
 343                                 display_sysfs_attrs);
 344         }
 345 }