kernel/drivers/video/fbdev/omap2/dss/overlay-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 "OVERLAY"
  22
  23 #include <linux/module.h>
  24 #include <linux/err.h>
  25 #include <linux/sysfs.h>
  26 #include <linux/kobject.h>
  27 #include <linux/platform_device.h>
  28
  29 #include <video/omapdss.h>
  30
  31 #include "dss.h"
  32 #include "dss_features.h"
  33
  34 static ssize_t overlay_name_show(struct omap_overlay *ovl, char *buf)
  35 {
  36         return snprintf(buf, PAGE_SIZE, "%s\n", ovl->name);
  37 }
  38
  39 static ssize_t overlay_manager_show(struct omap_overlay *ovl, char *buf)
  40 {
  41         return snprintf(buf, PAGE_SIZE, "%s\n",
  42                         ovl->manager ? ovl->manager->name : "<none>");
  43 }
  44
  45 static ssize_t overlay_manager_store(struct omap_overlay *ovl, const char *buf,
  46                 size_t size)
  47 {
  48         int i, r;
  49         struct omap_overlay_manager *mgr = NULL;
  50         struct omap_overlay_manager *old_mgr;
  51         int len = size;
  52
  53         if (buf[size-1] == '\n')
  54                 --len;
  55
  56         if (len > 0) {
  57                 for (i = 0; i < omap_dss_get_num_overlay_managers(); ++i) {
  58                         mgr = omap_dss_get_overlay_manager(i);
  59
  60                         if (sysfs_streq(buf, mgr->name))
  61                                 break;
  62
  63                         mgr = NULL;
  64                 }
  65         }
  66
  67         if (len > 0 && mgr == NULL)
  68                 return -EINVAL;
  69
  70         if (mgr)
  71                 DSSDBG("manager %s found\n", mgr->name);
  72
  73         if (mgr == ovl->manager)
  74                 return size;
  75
  76         old_mgr = ovl->manager;
  77
  78         r = dispc_runtime_get();
  79         if (r)
  80                 return r;
  81
  82         /* detach old manager */
  83         if (old_mgr) {
  84                 r = ovl->unset_manager(ovl);
  85                 if (r) {
  86                         DSSERR("detach failed\n");
  87                         goto err;
  88                 }
  89
  90                 r = old_mgr->apply(old_mgr);
  91                 if (r)
  92                         goto err;
  93         }
  94
  95         if (mgr) {
  96                 r = ovl->set_manager(ovl, mgr);
  97                 if (r) {
  98                         DSSERR("Failed to attach overlay\n");
  99                         goto err;
 100                 }
 101
 102                 r = mgr->apply(mgr);
 103                 if (r)
 104                         goto err;
 105         }
 106
 107         dispc_runtime_put();
 108
 109         return size;
 110
 111 err:
 112         dispc_runtime_put();
 113         return r;
 114 }
 115
 116 static ssize_t overlay_input_size_show(struct omap_overlay *ovl, char *buf)
 117 {
 118         struct omap_overlay_info info;
 119
 120         ovl->get_overlay_info(ovl, &info);
 121
 122         return snprintf(buf, PAGE_SIZE, "%d,%d\n",
 123                         info.width, info.height);
 124 }
 125
 126 static ssize_t overlay_screen_width_show(struct omap_overlay *ovl, char *buf)
 127 {
 128         struct omap_overlay_info info;
 129
 130         ovl->get_overlay_info(ovl, &info);
 131
 132         return snprintf(buf, PAGE_SIZE, "%d\n", info.screen_width);
 133 }
 134
 135 static ssize_t overlay_position_show(struct omap_overlay *ovl, char *buf)
 136 {
 137         struct omap_overlay_info info;
 138
 139         ovl->get_overlay_info(ovl, &info);
 140
 141         return snprintf(buf, PAGE_SIZE, "%d,%d\n",
 142                         info.pos_x, info.pos_y);
 143 }
 144
 145 static ssize_t overlay_position_store(struct omap_overlay *ovl,
 146                 const char *buf, size_t size)
 147 {
 148         int r;
 149         char *last;
 150         struct omap_overlay_info info;
 151
 152         ovl->get_overlay_info(ovl, &info);
 153
 154         info.pos_x = simple_strtoul(buf, &last, 10);
 155         ++last;
 156         if (last - buf >= size)
 157                 return -EINVAL;
 158
 159         info.pos_y = simple_strtoul(last, &last, 10);
 160
 161         r = ovl->set_overlay_info(ovl, &info);
 162         if (r)
 163                 return r;
 164
 165         if (ovl->manager) {
 166                 r = ovl->manager->apply(ovl->manager);
 167                 if (r)
 168                         return r;
 169         }
 170
 171         return size;
 172 }
 173
 174 static ssize_t overlay_output_size_show(struct omap_overlay *ovl, char *buf)
 175 {
 176         struct omap_overlay_info info;
 177
 178         ovl->get_overlay_info(ovl, &info);
 179
 180         return snprintf(buf, PAGE_SIZE, "%d,%d\n",
 181                         info.out_width, info.out_height);
 182 }
 183
 184 static ssize_t overlay_output_size_store(struct omap_overlay *ovl,
 185                 const char *buf, size_t size)
 186 {
 187         int r;
 188         char *last;
 189         struct omap_overlay_info info;
 190
 191         ovl->get_overlay_info(ovl, &info);
 192
 193         info.out_width = simple_strtoul(buf, &last, 10);
 194         ++last;
 195         if (last - buf >= size)
 196                 return -EINVAL;
 197
 198         info.out_height = simple_strtoul(last, &last, 10);
 199
 200         r = ovl->set_overlay_info(ovl, &info);
 201         if (r)
 202                 return r;
 203
 204         if (ovl->manager) {
 205                 r = ovl->manager->apply(ovl->manager);
 206                 if (r)
 207                         return r;
 208         }
 209
 210         return size;
 211 }
 212
 213 static ssize_t overlay_enabled_show(struct omap_overlay *ovl, char *buf)
 214 {
 215         return snprintf(buf, PAGE_SIZE, "%d\n", ovl->is_enabled(ovl));
 216 }
 217
 218 static ssize_t overlay_enabled_store(struct omap_overlay *ovl, const char *buf,
 219                 size_t size)
 220 {
 221         int r;
 222         bool enable;
 223
 224         r = strtobool(buf, &enable);
 225         if (r)
 226                 return r;
 227
 228         if (enable)
 229                 r = ovl->enable(ovl);
 230         else
 231                 r = ovl->disable(ovl);
 232
 233         if (r)
 234                 return r;
 235
 236         return size;
 237 }
 238
 239 static ssize_t overlay_global_alpha_show(struct omap_overlay *ovl, char *buf)
 240 {
 241         struct omap_overlay_info info;
 242
 243         ovl->get_overlay_info(ovl, &info);
 244
 245         return snprintf(buf, PAGE_SIZE, "%d\n",
 246                         info.global_alpha);
 247 }
 248
 249 static ssize_t overlay_global_alpha_store(struct omap_overlay *ovl,
 250                 const char *buf, size_t size)
 251 {
 252         int r;
 253         u8 alpha;
 254         struct omap_overlay_info info;
 255
 256         if ((ovl->caps & OMAP_DSS_OVL_CAP_GLOBAL_ALPHA) == 0)
 257                 return -ENODEV;
 258
 259         r = kstrtou8(buf, 0, &alpha);
 260         if (r)
 261                 return r;
 262
 263         ovl->get_overlay_info(ovl, &info);
 264
 265         info.global_alpha = alpha;
 266
 267         r = ovl->set_overlay_info(ovl, &info);
 268         if (r)
 269                 return r;
 270
 271         if (ovl->manager) {
 272                 r = ovl->manager->apply(ovl->manager);
 273                 if (r)
 274                         return r;
 275         }
 276
 277         return size;
 278 }
 279
 280 static ssize_t overlay_pre_mult_alpha_show(struct omap_overlay *ovl,
 281                 char *buf)
 282 {
 283         struct omap_overlay_info info;
 284
 285         ovl->get_overlay_info(ovl, &info);
 286
 287         return snprintf(buf, PAGE_SIZE, "%d\n",
 288                         info.pre_mult_alpha);
 289 }
 290
 291 static ssize_t overlay_pre_mult_alpha_store(struct omap_overlay *ovl,
 292                 const char *buf, size_t size)
 293 {
 294         int r;
 295         u8 alpha;
 296         struct omap_overlay_info info;
 297
 298         if ((ovl->caps & OMAP_DSS_OVL_CAP_PRE_MULT_ALPHA) == 0)
 299                 return -ENODEV;
 300
 301         r = kstrtou8(buf, 0, &alpha);
 302         if (r)
 303                 return r;
 304
 305         ovl->get_overlay_info(ovl, &info);
 306
 307         info.pre_mult_alpha = alpha;
 308
 309         r = ovl->set_overlay_info(ovl, &info);
 310         if (r)
 311                 return r;
 312
 313         if (ovl->manager) {
 314                 r = ovl->manager->apply(ovl->manager);
 315                 if (r)
 316                         return r;
 317         }
 318
 319         return size;
 320 }
 321
 322 static ssize_t overlay_zorder_show(struct omap_overlay *ovl, char *buf)
 323 {
 324         struct omap_overlay_info info;
 325
 326         ovl->get_overlay_info(ovl, &info);
 327
 328         return snprintf(buf, PAGE_SIZE, "%d\n", info.zorder);
 329 }
 330
 331 static ssize_t overlay_zorder_store(struct omap_overlay *ovl,
 332                 const char *buf, size_t size)
 333 {
 334         int r;
 335         u8 zorder;
 336         struct omap_overlay_info info;
 337
 338         if ((ovl->caps & OMAP_DSS_OVL_CAP_ZORDER) == 0)
 339                 return -ENODEV;
 340
 341         r = kstrtou8(buf, 0, &zorder);
 342         if (r)
 343                 return r;
 344
 345         ovl->get_overlay_info(ovl, &info);
 346
 347         info.zorder = zorder;
 348
 349         r = ovl->set_overlay_info(ovl, &info);
 350         if (r)
 351                 return r;
 352
 353         if (ovl->manager) {
 354                 r = ovl->manager->apply(ovl->manager);
 355                 if (r)
 356                         return r;
 357         }
 358
 359         return size;
 360 }
 361
 362 struct overlay_attribute {
 363         struct attribute attr;
 364         ssize_t (*show)(struct omap_overlay *, char *);
 365         ssize_t (*store)(struct omap_overlay *, const char *, size_t);
 366 };
 367
 368 #define OVERLAY_ATTR(_name, _mode, _show, _store) \
 369         struct overlay_attribute overlay_attr_##_name = \
 370         __ATTR(_name, _mode, _show, _store)
 371
 372 static OVERLAY_ATTR(name, S_IRUGO, overlay_name_show, NULL);
 373 static OVERLAY_ATTR(manager, S_IRUGO|S_IWUSR,
 374                 overlay_manager_show, overlay_manager_store);
 375 static OVERLAY_ATTR(input_size, S_IRUGO, overlay_input_size_show, NULL);
 376 static OVERLAY_ATTR(screen_width, S_IRUGO, overlay_screen_width_show, NULL);
 377 static OVERLAY_ATTR(position, S_IRUGO|S_IWUSR,
 378                 overlay_position_show, overlay_position_store);
 379 static OVERLAY_ATTR(output_size, S_IRUGO|S_IWUSR,
 380                 overlay_output_size_show, overlay_output_size_store);
 381 static OVERLAY_ATTR(enabled, S_IRUGO|S_IWUSR,
 382                 overlay_enabled_show, overlay_enabled_store);
 383 static OVERLAY_ATTR(global_alpha, S_IRUGO|S_IWUSR,
 384                 overlay_global_alpha_show, overlay_global_alpha_store);
 385 static OVERLAY_ATTR(pre_mult_alpha, S_IRUGO|S_IWUSR,
 386                 overlay_pre_mult_alpha_show,
 387                 overlay_pre_mult_alpha_store);
 388 static OVERLAY_ATTR(zorder, S_IRUGO|S_IWUSR,
 389                 overlay_zorder_show, overlay_zorder_store);
 390
 391 static struct attribute *overlay_sysfs_attrs[] = {
 392         &overlay_attr_name.attr,
 393         &overlay_attr_manager.attr,
 394         &overlay_attr_input_size.attr,
 395         &overlay_attr_screen_width.attr,
 396         &overlay_attr_position.attr,
 397         &overlay_attr_output_size.attr,
 398         &overlay_attr_enabled.attr,
 399         &overlay_attr_global_alpha.attr,
 400         &overlay_attr_pre_mult_alpha.attr,
 401         &overlay_attr_zorder.attr,
 402         NULL
 403 };
 404
 405 static ssize_t overlay_attr_show(struct kobject *kobj, struct attribute *attr,
 406                 char *buf)
 407 {
 408         struct omap_overlay *overlay;
 409         struct overlay_attribute *overlay_attr;
 410
 411         overlay = container_of(kobj, struct omap_overlay, kobj);
 412         overlay_attr = container_of(attr, struct overlay_attribute, attr);
 413
 414         if (!overlay_attr->show)
 415                 return -ENOENT;
 416
 417         return overlay_attr->show(overlay, buf);
 418 }
 419
 420 static ssize_t overlay_attr_store(struct kobject *kobj, struct attribute *attr,
 421                 const char *buf, size_t size)
 422 {
 423         struct omap_overlay *overlay;
 424         struct overlay_attribute *overlay_attr;
 425
 426         overlay = container_of(kobj, struct omap_overlay, kobj);
 427         overlay_attr = container_of(attr, struct overlay_attribute, attr);
 428
 429         if (!overlay_attr->store)
 430                 return -ENOENT;
 431
 432         return overlay_attr->store(overlay, buf, size);
 433 }
 434
 435 static const struct sysfs_ops overlay_sysfs_ops = {
 436         .show = overlay_attr_show,
 437         .store = overlay_attr_store,
 438 };
 439
 440 static struct kobj_type overlay_ktype = {
 441         .sysfs_ops = &overlay_sysfs_ops,
 442         .default_attrs = overlay_sysfs_attrs,
 443 };
 444
 445 int dss_overlay_kobj_init(struct omap_overlay *ovl,
 446                 struct platform_device *pdev)
 447 {
 448         return kobject_init_and_add(&ovl->kobj, &overlay_ktype,
 449                         &pdev->dev.kobj, "overlay%d", ovl->id);
 450 }
 451
 452 void dss_overlay_kobj_uninit(struct omap_overlay *ovl)
 453 {
 454         kobject_del(&ovl->kobj);
 455         kobject_put(&ovl->kobj);
 456 }