Commit | Line | Data |
---|---|---|
eed07e0e TV |
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> | |
eed07e0e TV |
28 | #include <linux/platform_device.h> |
29 | ||
30 | #include <plat/display.h> | |
31 | #include "dss.h" | |
32 | ||
eed07e0e TV |
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 | ||
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) { | |
37ac60e4 | 53 | r = dssdev->driver->enable(dssdev); |
eed07e0e TV |
54 | if (r) |
55 | return r; | |
56 | } else { | |
37ac60e4 | 57 | dssdev->driver->disable(dssdev); |
eed07e0e TV |
58 | } |
59 | } | |
60 | ||
61 | return size; | |
62 | } | |
63 | ||
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; | |
446f7bff TV |
69 | if (dssdev->driver->get_update_mode) |
70 | mode = dssdev->driver->get_update_mode(dssdev); | |
eed07e0e TV |
71 | return snprintf(buf, PAGE_SIZE, "%d\n", mode); |
72 | } | |
73 | ||
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 | ||
825f50b1 VS |
82 | if (!dssdev->driver->set_update_mode) |
83 | return -EINVAL; | |
84 | ||
eed07e0e TV |
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 | ||
446f7bff | 97 | r = dssdev->driver->set_update_mode(dssdev, mode); |
eed07e0e TV |
98 | if (r) |
99 | return r; | |
100 | ||
101 | return size; | |
102 | } | |
103 | ||
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", | |
225b650d TV |
109 | dssdev->driver->get_te ? |
110 | dssdev->driver->get_te(dssdev) : 0); | |
eed07e0e TV |
111 | } |
112 | ||
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 | ||
225b650d | 120 | if (!dssdev->driver->enable_te || !dssdev->driver->get_te) |
eed07e0e TV |
121 | return -ENOENT; |
122 | ||
123 | te = simple_strtoul(buf, NULL, 0); | |
124 | ||
225b650d | 125 | r = dssdev->driver->enable_te(dssdev, te); |
eed07e0e TV |
126 | if (r) |
127 | return r; | |
128 | ||
129 | return size; | |
130 | } | |
131 | ||
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 | ||
69b2048f | 138 | if (!dssdev->driver->get_timings) |
eed07e0e TV |
139 | return -ENOENT; |
140 | ||
69b2048f | 141 | dssdev->driver->get_timings(dssdev, &t); |
eed07e0e TV |
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 | ||
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 | ||
69b2048f | 156 | if (!dssdev->driver->set_timings || !dssdev->driver->check_timings) |
eed07e0e TV |
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 | ||
69b2048f | 175 | r = dssdev->driver->check_timings(dssdev, &t); |
eed07e0e TV |
176 | if (r) |
177 | return r; | |
178 | ||
69b2048f | 179 | dssdev->driver->set_timings(dssdev, &t); |
eed07e0e TV |
180 | |
181 | return size; | |
182 | } | |
183 | ||
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; | |
87424e1b | 189 | if (!dssdev->driver->get_rotate) |
eed07e0e | 190 | return -ENOENT; |
87424e1b | 191 | rotate = dssdev->driver->get_rotate(dssdev); |
eed07e0e TV |
192 | return snprintf(buf, PAGE_SIZE, "%u\n", rotate); |
193 | } | |
194 | ||
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 | ||
87424e1b | 202 | if (!dssdev->driver->set_rotate || !dssdev->driver->get_rotate) |
eed07e0e TV |
203 | return -ENOENT; |
204 | ||
205 | rot = simple_strtoul(buf, NULL, 0); | |
206 | ||
87424e1b | 207 | r = dssdev->driver->set_rotate(dssdev, rot); |
eed07e0e TV |
208 | if (r) |
209 | return r; | |
210 | ||
211 | return size; | |
212 | } | |
213 | ||
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; | |
8d8aa61d | 219 | if (!dssdev->driver->get_mirror) |
eed07e0e | 220 | return -ENOENT; |
8d8aa61d | 221 | mirror = dssdev->driver->get_mirror(dssdev); |
eed07e0e TV |
222 | return snprintf(buf, PAGE_SIZE, "%u\n", mirror); |
223 | } | |
224 | ||
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 | ||
8d8aa61d | 232 | if (!dssdev->driver->set_mirror || !dssdev->driver->get_mirror) |
eed07e0e TV |
233 | return -ENOENT; |
234 | ||
235 | mirror = simple_strtoul(buf, NULL, 0); | |
236 | ||
8d8aa61d | 237 | r = dssdev->driver->set_mirror(dssdev, mirror); |
eed07e0e TV |
238 | if (r) |
239 | return r; | |
240 | ||
241 | return size; | |
242 | } | |
243 | ||
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 | ||
36511312 | 250 | if (!dssdev->driver->get_wss) |
eed07e0e TV |
251 | return -ENOENT; |
252 | ||
36511312 | 253 | wss = dssdev->driver->get_wss(dssdev); |
eed07e0e TV |
254 | |
255 | return snprintf(buf, PAGE_SIZE, "0x%05x\n", wss); | |
256 | } | |
257 | ||
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 | ||
36511312 | 265 | if (!dssdev->driver->get_wss || !dssdev->driver->set_wss) |
eed07e0e TV |
266 | return -ENOENT; |
267 | ||
268 | if (strict_strtoul(buf, 0, &wss)) | |
269 | return -EINVAL; | |
270 | ||
271 | if (wss > 0xfffff) | |
272 | return -EINVAL; | |
273 | ||
36511312 | 274 | r = dssdev->driver->set_wss(dssdev, wss); |
eed07e0e TV |
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 | ||
96adcece | 307 | void omapdss_default_get_resolution(struct omap_dss_device *dssdev, |
eed07e0e TV |
308 | u16 *xres, u16 *yres) |
309 | { | |
310 | *xres = dssdev->panel.timings.x_res; | |
311 | *yres = dssdev->panel.timings.y_res; | |
312 | } | |
96adcece | 313 | EXPORT_SYMBOL(omapdss_default_get_resolution); |
eed07e0e TV |
314 | |
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 | ||
a2699504 | 328 | int omapdss_default_get_recommended_bpp(struct omap_dss_device *dssdev) |
eed07e0e | 329 | { |
eed07e0e TV |
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: | |
b119601d | 345 | case OMAP_DISPLAY_TYPE_HDMI: |
eed07e0e | 346 | return 24; |
eed07e0e TV |
347 | default: |
348 | BUG(); | |
349 | } | |
350 | } | |
a2699504 | 351 | EXPORT_SYMBOL(omapdss_default_get_recommended_bpp); |
eed07e0e TV |
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 */ | |
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; | |
b119601d | 372 | case OMAP_DISPLAY_TYPE_HDMI: |
eed07e0e TV |
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 | ||
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 | ||
eed07e0e | 395 | switch (dssdev->type) { |
b4d78bf7 | 396 | #ifdef CONFIG_OMAP2_DSS_DPI |
eed07e0e TV |
397 | case OMAP_DISPLAY_TYPE_DPI: |
398 | r = dpi_init_display(dssdev); | |
399 | break; | |
b4d78bf7 | 400 | #endif |
eed07e0e TV |
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 | |
c3198a5e M |
421 | case OMAP_DISPLAY_TYPE_HDMI: |
422 | r = hdmi_init_display(dssdev); | |
423 | break; | |
eed07e0e | 424 | default: |
e528e3a8 TV |
425 | DSSERR("Support for display '%s' not compiled in.\n", |
426 | dssdev->name); | |
427 | return; | |
eed07e0e TV |
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 | ||
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 | ||
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 | ||
37ac60e4 | 475 | if (!dssdev->driver->suspend) { |
eed07e0e TV |
476 | DSSERR("display '%s' doesn't implement suspend\n", |
477 | dssdev->name); | |
478 | return -ENOSYS; | |
479 | } | |
480 | ||
37ac60e4 | 481 | r = dssdev->driver->suspend(dssdev); |
eed07e0e TV |
482 | if (r) |
483 | return r; | |
484 | ||
485 | dssdev->activate_after_resume = true; | |
486 | ||
487 | return 0; | |
488 | } | |
489 | ||
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 | ||
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 | ||
37ac60e4 TV |
510 | if (dssdev->activate_after_resume && dssdev->driver->resume) { |
511 | r = dssdev->driver->resume(dssdev); | |
eed07e0e TV |
512 | if (r) |
513 | return r; | |
514 | } | |
515 | ||
516 | dssdev->activate_after_resume = false; | |
517 | ||
518 | return 0; | |
519 | } | |
520 | ||
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 | ||
528 | static int dss_disable_device(struct device *dev, void *data) | |
529 | { | |
530 | struct omap_dss_device *dssdev = to_dss_device(dev); | |
279fcd48 JN |
531 | |
532 | if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED) | |
533 | dssdev->driver->disable(dssdev); | |
534 | ||
eed07e0e TV |
535 | return 0; |
536 | } | |
537 | ||
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 | ||
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 | ||
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. */ | |
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 | { | |
eed07e0e TV |
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 | ||
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 | ||
596 | int omap_dss_start_device(struct omap_dss_device *dssdev) | |
597 | { | |
eed07e0e TV |
598 | if (!dssdev->driver) { |
599 | DSSDBG("no driver\n"); | |
e020f9af | 600 | return -ENODEV; |
eed07e0e TV |
601 | } |
602 | ||
603 | if (!try_module_get(dssdev->dev.driver->owner)) { | |
e020f9af | 604 | return -ENODEV; |
eed07e0e TV |
605 | } |
606 | ||
607 | return 0; | |
eed07e0e TV |
608 | } |
609 | EXPORT_SYMBOL(omap_dss_start_device); | |
610 | ||
611 | void omap_dss_stop_device(struct omap_dss_device *dssdev) | |
612 | { | |
eed07e0e TV |
613 | module_put(dssdev->dev.driver->owner); |
614 | } | |
615 | EXPORT_SYMBOL(omap_dss_stop_device); | |
616 |