1 /*
2 * linux/drivers/video/omap2/dss/display.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 "DISPLAY"
24
25 #include <linux/kernel.h>
26 #include <linux/module.h>
27 #include <linux/jiffies.h>
28 #include <linux/platform_device.h>
29
30 #include <plat/display.h>
31 #include "dss.h"
32
display_enabled_show(struct device * dev,struct device_attribute * attr,char * buf)33 static ssize_t display_enabled_show(struct device *dev,
34 struct device_attribute *attr, char *buf)
35 {
36 struct omap_dss_device *dssdev = to_dss_device(dev);
37 bool enabled = dssdev->state != OMAP_DSS_DISPLAY_DISABLED;
38
39 return snprintf(buf, PAGE_SIZE, "%d\n", enabled);
40 }
41
display_enabled_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)42 static ssize_t display_enabled_store(struct device *dev,
43 struct device_attribute *attr,
44 const char *buf, size_t size)
45 {
46 struct omap_dss_device *dssdev = to_dss_device(dev);
47 bool enabled, r;
48
49 enabled = simple_strtoul(buf, NULL, 10);
50
51 if (enabled != (dssdev->state != OMAP_DSS_DISPLAY_DISABLED)) {
52 if (enabled) {
53 r = dssdev->driver->enable(dssdev);
54 if (r)
55 return r;
56 } else {
57 dssdev->driver->disable(dssdev);
58 }
59 }
60
61 return size;
62 }
63
display_upd_mode_show(struct device * dev,struct device_attribute * attr,char * buf)64 static ssize_t display_upd_mode_show(struct device *dev,
65 struct device_attribute *attr, char *buf)
66 {
67 struct omap_dss_device *dssdev = to_dss_device(dev);
68 enum omap_dss_update_mode mode = OMAP_DSS_UPDATE_AUTO;
69 if (dssdev->driver->get_update_mode)
70 mode = dssdev->driver->get_update_mode(dssdev);
71 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
72 }
73
display_upd_mode_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)74 static ssize_t display_upd_mode_store(struct device *dev,
75 struct device_attribute *attr,
76 const char *buf, size_t size)
77 {
78 struct omap_dss_device *dssdev = to_dss_device(dev);
79 int val, r;
80 enum omap_dss_update_mode mode;
81
82 if (!dssdev->driver->set_update_mode)
83 return -EINVAL;
84
85 val = simple_strtoul(buf, NULL, 10);
86
87 switch (val) {
88 case OMAP_DSS_UPDATE_DISABLED:
89 case OMAP_DSS_UPDATE_AUTO:
90 case OMAP_DSS_UPDATE_MANUAL:
91 mode = (enum omap_dss_update_mode)val;
92 break;
93 default:
94 return -EINVAL;
95 }
96
97 r = dssdev->driver->set_update_mode(dssdev, mode);
98 if (r)
99 return r;
100
101 return size;
102 }
103
display_tear_show(struct device * dev,struct device_attribute * attr,char * buf)104 static ssize_t display_tear_show(struct device *dev,
105 struct device_attribute *attr, char *buf)
106 {
107 struct omap_dss_device *dssdev = to_dss_device(dev);
108 return snprintf(buf, PAGE_SIZE, "%d\n",
109 dssdev->driver->get_te ?
110 dssdev->driver->get_te(dssdev) : 0);
111 }
112
display_tear_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)113 static ssize_t display_tear_store(struct device *dev,
114 struct device_attribute *attr, const char *buf, size_t size)
115 {
116 struct omap_dss_device *dssdev = to_dss_device(dev);
117 unsigned long te;
118 int r;
119
120 if (!dssdev->driver->enable_te || !dssdev->driver->get_te)
121 return -ENOENT;
122
123 te = simple_strtoul(buf, NULL, 0);
124
125 r = dssdev->driver->enable_te(dssdev, te);
126 if (r)
127 return r;
128
129 return size;
130 }
131
display_timings_show(struct device * dev,struct device_attribute * attr,char * buf)132 static ssize_t display_timings_show(struct device *dev,
133 struct device_attribute *attr, char *buf)
134 {
135 struct omap_dss_device *dssdev = to_dss_device(dev);
136 struct omap_video_timings t;
137
138 if (!dssdev->driver->get_timings)
139 return -ENOENT;
140
141 dssdev->driver->get_timings(dssdev, &t);
142
143 return snprintf(buf, PAGE_SIZE, "%u,%u/%u/%u/%u,%u/%u/%u/%u\n",
144 t.pixel_clock,
145 t.x_res, t.hfp, t.hbp, t.hsw,
146 t.y_res, t.vfp, t.vbp, t.vsw);
147 }
148
display_timings_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)149 static ssize_t display_timings_store(struct device *dev,
150 struct device_attribute *attr, const char *buf, size_t size)
151 {
152 struct omap_dss_device *dssdev = to_dss_device(dev);
153 struct omap_video_timings t;
154 int r, found;
155
156 if (!dssdev->driver->set_timings || !dssdev->driver->check_timings)
157 return -ENOENT;
158
159 found = 0;
160 #ifdef CONFIG_OMAP2_DSS_VENC
161 if (strncmp("pal", buf, 3) == 0) {
162 t = omap_dss_pal_timings;
163 found = 1;
164 } else if (strncmp("ntsc", buf, 4) == 0) {
165 t = omap_dss_ntsc_timings;
166 found = 1;
167 }
168 #endif
169 if (!found && sscanf(buf, "%u,%hu/%hu/%hu/%hu,%hu/%hu/%hu/%hu",
170 &t.pixel_clock,
171 &t.x_res, &t.hfp, &t.hbp, &t.hsw,
172 &t.y_res, &t.vfp, &t.vbp, &t.vsw) != 9)
173 return -EINVAL;
174
175 r = dssdev->driver->check_timings(dssdev, &t);
176 if (r)
177 return r;
178
179 dssdev->driver->set_timings(dssdev, &t);
180
181 return size;
182 }
183
display_rotate_show(struct device * dev,struct device_attribute * attr,char * buf)184 static ssize_t display_rotate_show(struct device *dev,
185 struct device_attribute *attr, char *buf)
186 {
187 struct omap_dss_device *dssdev = to_dss_device(dev);
188 int rotate;
189 if (!dssdev->driver->get_rotate)
190 return -ENOENT;
191 rotate = dssdev->driver->get_rotate(dssdev);
192 return snprintf(buf, PAGE_SIZE, "%u\n", rotate);
193 }
194
display_rotate_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)195 static ssize_t display_rotate_store(struct device *dev,
196 struct device_attribute *attr, const char *buf, size_t size)
197 {
198 struct omap_dss_device *dssdev = to_dss_device(dev);
199 unsigned long rot;
200 int r;
201
202 if (!dssdev->driver->set_rotate || !dssdev->driver->get_rotate)
203 return -ENOENT;
204
205 rot = simple_strtoul(buf, NULL, 0);
206
207 r = dssdev->driver->set_rotate(dssdev, rot);
208 if (r)
209 return r;
210
211 return size;
212 }
213
display_mirror_show(struct device * dev,struct device_attribute * attr,char * buf)214 static ssize_t display_mirror_show(struct device *dev,
215 struct device_attribute *attr, char *buf)
216 {
217 struct omap_dss_device *dssdev = to_dss_device(dev);
218 int mirror;
219 if (!dssdev->driver->get_mirror)
220 return -ENOENT;
221 mirror = dssdev->driver->get_mirror(dssdev);
222 return snprintf(buf, PAGE_SIZE, "%u\n", mirror);
223 }
224
display_mirror_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)225 static ssize_t display_mirror_store(struct device *dev,
226 struct device_attribute *attr, const char *buf, size_t size)
227 {
228 struct omap_dss_device *dssdev = to_dss_device(dev);
229 unsigned long mirror;
230 int r;
231
232 if (!dssdev->driver->set_mirror || !dssdev->driver->get_mirror)
233 return -ENOENT;
234
235 mirror = simple_strtoul(buf, NULL, 0);
236
237 r = dssdev->driver->set_mirror(dssdev, mirror);
238 if (r)
239 return r;
240
241 return size;
242 }
243
display_wss_show(struct device * dev,struct device_attribute * attr,char * buf)244 static ssize_t display_wss_show(struct device *dev,
245 struct device_attribute *attr, char *buf)
246 {
247 struct omap_dss_device *dssdev = to_dss_device(dev);
248 unsigned int wss;
249
250 if (!dssdev->driver->get_wss)
251 return -ENOENT;
252
253 wss = dssdev->driver->get_wss(dssdev);
254
255 return snprintf(buf, PAGE_SIZE, "0x%05x\n", wss);
256 }
257
display_wss_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)258 static ssize_t display_wss_store(struct device *dev,
259 struct device_attribute *attr, const char *buf, size_t size)
260 {
261 struct omap_dss_device *dssdev = to_dss_device(dev);
262 unsigned long wss;
263 int r;
264
265 if (!dssdev->driver->get_wss || !dssdev->driver->set_wss)
266 return -ENOENT;
267
268 if (strict_strtoul(buf, 0, &wss))
269 return -EINVAL;
270
271 if (wss > 0xfffff)
272 return -EINVAL;
273
274 r = dssdev->driver->set_wss(dssdev, wss);
275 if (r)
276 return r;
277
278 return size;
279 }
280
281 static DEVICE_ATTR(enabled, S_IRUGO|S_IWUSR,
282 display_enabled_show, display_enabled_store);
283 static DEVICE_ATTR(update_mode, S_IRUGO|S_IWUSR,
284 display_upd_mode_show, display_upd_mode_store);
285 static DEVICE_ATTR(tear_elim, S_IRUGO|S_IWUSR,
286 display_tear_show, display_tear_store);
287 static DEVICE_ATTR(timings, S_IRUGO|S_IWUSR,
288 display_timings_show, display_timings_store);
289 static DEVICE_ATTR(rotate, S_IRUGO|S_IWUSR,
290 display_rotate_show, display_rotate_store);
291 static DEVICE_ATTR(mirror, S_IRUGO|S_IWUSR,
292 display_mirror_show, display_mirror_store);
293 static DEVICE_ATTR(wss, S_IRUGO|S_IWUSR,
294 display_wss_show, display_wss_store);
295
296 static struct device_attribute *display_sysfs_attrs[] = {
297 &dev_attr_enabled,
298 &dev_attr_update_mode,
299 &dev_attr_tear_elim,
300 &dev_attr_timings,
301 &dev_attr_rotate,
302 &dev_attr_mirror,
303 &dev_attr_wss,
304 NULL
305 };
306
omapdss_default_get_resolution(struct omap_dss_device * dssdev,u16 * xres,u16 * yres)307 void omapdss_default_get_resolution(struct omap_dss_device *dssdev,
308 u16 *xres, u16 *yres)
309 {
310 *xres = dssdev->panel.timings.x_res;
311 *yres = dssdev->panel.timings.y_res;
312 }
313 EXPORT_SYMBOL(omapdss_default_get_resolution);
314
default_get_overlay_fifo_thresholds(enum omap_plane plane,u32 fifo_size,enum omap_burst_size * burst_size,u32 * fifo_low,u32 * fifo_high)315 void default_get_overlay_fifo_thresholds(enum omap_plane plane,
316 u32 fifo_size, enum omap_burst_size *burst_size,
317 u32 *fifo_low, u32 *fifo_high)
318 {
319 unsigned burst_size_bytes;
320
321 *burst_size = OMAP_DSS_BURST_16x32;
322 burst_size_bytes = 16 * 32 / 8;
323
324 *fifo_high = fifo_size - 1;
325 *fifo_low = fifo_size - burst_size_bytes;
326 }
327
omapdss_default_get_recommended_bpp(struct omap_dss_device * dssdev)328 int omapdss_default_get_recommended_bpp(struct omap_dss_device *dssdev)
329 {
330 switch (dssdev->type) {
331 case OMAP_DISPLAY_TYPE_DPI:
332 if (dssdev->phy.dpi.data_lines == 24)
333 return 24;
334 else
335 return 16;
336
337 case OMAP_DISPLAY_TYPE_DBI:
338 case OMAP_DISPLAY_TYPE_DSI:
339 if (dssdev->ctrl.pixel_size == 24)
340 return 24;
341 else
342 return 16;
343 case OMAP_DISPLAY_TYPE_VENC:
344 case OMAP_DISPLAY_TYPE_SDI:
345 case OMAP_DISPLAY_TYPE_HDMI:
346 return 24;
347 default:
348 BUG();
349 }
350 }
351 EXPORT_SYMBOL(omapdss_default_get_recommended_bpp);
352
353 /* Checks if replication logic should be used. Only use for active matrix,
354 * when overlay is in RGB12U or RGB16 mode, and LCD interface is
355 * 18bpp or 24bpp */
dss_use_replication(struct omap_dss_device * dssdev,enum omap_color_mode mode)356 bool dss_use_replication(struct omap_dss_device *dssdev,
357 enum omap_color_mode mode)
358 {
359 int bpp;
360
361 if (mode != OMAP_DSS_COLOR_RGB12U && mode != OMAP_DSS_COLOR_RGB16)
362 return false;
363
364 if (dssdev->type == OMAP_DISPLAY_TYPE_DPI &&
365 (dssdev->panel.config & OMAP_DSS_LCD_TFT) == 0)
366 return false;
367
368 switch (dssdev->type) {
369 case OMAP_DISPLAY_TYPE_DPI:
370 bpp = dssdev->phy.dpi.data_lines;
371 break;
372 case OMAP_DISPLAY_TYPE_HDMI:
373 case OMAP_DISPLAY_TYPE_VENC:
374 case OMAP_DISPLAY_TYPE_SDI:
375 bpp = 24;
376 break;
377 case OMAP_DISPLAY_TYPE_DBI:
378 case OMAP_DISPLAY_TYPE_DSI:
379 bpp = dssdev->ctrl.pixel_size;
380 break;
381 default:
382 BUG();
383 }
384
385 return bpp > 16;
386 }
387
dss_init_device(struct platform_device * pdev,struct omap_dss_device * dssdev)388 void dss_init_device(struct platform_device *pdev,
389 struct omap_dss_device *dssdev)
390 {
391 struct device_attribute *attr;
392 int i;
393 int r;
394
395 switch (dssdev->type) {
396 #ifdef CONFIG_OMAP2_DSS_DPI
397 case OMAP_DISPLAY_TYPE_DPI:
398 r = dpi_init_display(dssdev);
399 break;
400 #endif
401 #ifdef CONFIG_OMAP2_DSS_RFBI
402 case OMAP_DISPLAY_TYPE_DBI:
403 r = rfbi_init_display(dssdev);
404 break;
405 #endif
406 #ifdef CONFIG_OMAP2_DSS_VENC
407 case OMAP_DISPLAY_TYPE_VENC:
408 r = venc_init_display(dssdev);
409 break;
410 #endif
411 #ifdef CONFIG_OMAP2_DSS_SDI
412 case OMAP_DISPLAY_TYPE_SDI:
413 r = sdi_init_display(dssdev);
414 break;
415 #endif
416 #ifdef CONFIG_OMAP2_DSS_DSI
417 case OMAP_DISPLAY_TYPE_DSI:
418 r = dsi_init_display(dssdev);
419 break;
420 #endif
421 case OMAP_DISPLAY_TYPE_HDMI:
422 r = hdmi_init_display(dssdev);
423 break;
424 default:
425 DSSERR("Support for display '%s' not compiled in.\n",
426 dssdev->name);
427 return;
428 }
429
430 if (r) {
431 DSSERR("failed to init display %s\n", dssdev->name);
432 return;
433 }
434
435 /* create device sysfs files */
436 i = 0;
437 while ((attr = display_sysfs_attrs[i++]) != NULL) {
438 r = device_create_file(&dssdev->dev, attr);
439 if (r)
440 DSSERR("failed to create sysfs file\n");
441 }
442
443 /* create display? sysfs links */
444 r = sysfs_create_link(&pdev->dev.kobj, &dssdev->dev.kobj,
445 dev_name(&dssdev->dev));
446 if (r)
447 DSSERR("failed to create sysfs display link\n");
448 }
449
dss_uninit_device(struct platform_device * pdev,struct omap_dss_device * dssdev)450 void dss_uninit_device(struct platform_device *pdev,
451 struct omap_dss_device *dssdev)
452 {
453 struct device_attribute *attr;
454 int i = 0;
455
456 sysfs_remove_link(&pdev->dev.kobj, dev_name(&dssdev->dev));
457
458 while ((attr = display_sysfs_attrs[i++]) != NULL)
459 device_remove_file(&dssdev->dev, attr);
460
461 if (dssdev->manager)
462 dssdev->manager->unset_device(dssdev->manager);
463 }
464
dss_suspend_device(struct device * dev,void * data)465 static int dss_suspend_device(struct device *dev, void *data)
466 {
467 int r;
468 struct omap_dss_device *dssdev = to_dss_device(dev);
469
470 if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) {
471 dssdev->activate_after_resume = false;
472 return 0;
473 }
474
475 if (!dssdev->driver->suspend) {
476 DSSERR("display '%s' doesn't implement suspend\n",
477 dssdev->name);
478 return -ENOSYS;
479 }
480
481 r = dssdev->driver->suspend(dssdev);
482 if (r)
483 return r;
484
485 dssdev->activate_after_resume = true;
486
487 return 0;
488 }
489
dss_suspend_all_devices(void)490 int dss_suspend_all_devices(void)
491 {
492 int r;
493 struct bus_type *bus = dss_get_bus();
494
495 r = bus_for_each_dev(bus, NULL, NULL, dss_suspend_device);
496 if (r) {
497 /* resume all displays that were suspended */
498 dss_resume_all_devices();
499 return r;
500 }
501
502 return 0;
503 }
504
dss_resume_device(struct device * dev,void * data)505 static int dss_resume_device(struct device *dev, void *data)
506 {
507 int r;
508 struct omap_dss_device *dssdev = to_dss_device(dev);
509
510 if (dssdev->activate_after_resume && dssdev->driver->resume) {
511 r = dssdev->driver->resume(dssdev);
512 if (r)
513 return r;
514 }
515
516 dssdev->activate_after_resume = false;
517
518 return 0;
519 }
520
dss_resume_all_devices(void)521 int dss_resume_all_devices(void)
522 {
523 struct bus_type *bus = dss_get_bus();
524
525 return bus_for_each_dev(bus, NULL, NULL, dss_resume_device);
526 }
527
dss_disable_device(struct device * dev,void * data)528 static int dss_disable_device(struct device *dev, void *data)
529 {
530 struct omap_dss_device *dssdev = to_dss_device(dev);
531
532 if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED)
533 dssdev->driver->disable(dssdev);
534
535 return 0;
536 }
537
dss_disable_all_devices(void)538 void dss_disable_all_devices(void)
539 {
540 struct bus_type *bus = dss_get_bus();
541 bus_for_each_dev(bus, NULL, NULL, dss_disable_device);
542 }
543
544
omap_dss_get_device(struct omap_dss_device * dssdev)545 void omap_dss_get_device(struct omap_dss_device *dssdev)
546 {
547 get_device(&dssdev->dev);
548 }
549 EXPORT_SYMBOL(omap_dss_get_device);
550
omap_dss_put_device(struct omap_dss_device * dssdev)551 void omap_dss_put_device(struct omap_dss_device *dssdev)
552 {
553 put_device(&dssdev->dev);
554 }
555 EXPORT_SYMBOL(omap_dss_put_device);
556
557 /* ref count of the found device is incremented. ref count
558 * of from-device is decremented. */
omap_dss_get_next_device(struct omap_dss_device * from)559 struct omap_dss_device *omap_dss_get_next_device(struct omap_dss_device *from)
560 {
561 struct device *dev;
562 struct device *dev_start = NULL;
563 struct omap_dss_device *dssdev = NULL;
564
565 int match(struct device *dev, void *data)
566 {
567 return 1;
568 }
569
570 if (from)
571 dev_start = &from->dev;
572 dev = bus_find_device(dss_get_bus(), dev_start, NULL, match);
573 if (dev)
574 dssdev = to_dss_device(dev);
575 if (from)
576 put_device(&from->dev);
577
578 return dssdev;
579 }
580 EXPORT_SYMBOL(omap_dss_get_next_device);
581
omap_dss_find_device(void * data,int (* match)(struct omap_dss_device * dssdev,void * data))582 struct omap_dss_device *omap_dss_find_device(void *data,
583 int (*match)(struct omap_dss_device *dssdev, void *data))
584 {
585 struct omap_dss_device *dssdev = NULL;
586
587 while ((dssdev = omap_dss_get_next_device(dssdev)) != NULL) {
588 if (match(dssdev, data))
589 return dssdev;
590 }
591
592 return NULL;
593 }
594 EXPORT_SYMBOL(omap_dss_find_device);
595
omap_dss_start_device(struct omap_dss_device * dssdev)596 int omap_dss_start_device(struct omap_dss_device *dssdev)
597 {
598 if (!dssdev->driver) {
599 DSSDBG("no driver\n");
600 return -ENODEV;
601 }
602
603 if (!try_module_get(dssdev->dev.driver->owner)) {
604 return -ENODEV;
605 }
606
607 return 0;
608 }
609 EXPORT_SYMBOL(omap_dss_start_device);
610
omap_dss_stop_device(struct omap_dss_device * dssdev)611 void omap_dss_stop_device(struct omap_dss_device *dssdev)
612 {
613 module_put(dssdev->dev.driver->owner);
614 }
615 EXPORT_SYMBOL(omap_dss_stop_device);
616
617