2 * linux/drivers/video/omap2/dss/display.c
4 * Copyright (C) 2009 Nokia Corporation
5 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
7 * Some code and ideas taken from drivers/video/omap/ driver
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.
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
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/>.
23 #define DSS_SUBSYS_NAME "DISPLAY"
25 #include <linux/kernel.h>
26 #include <linux/module.h>
27 #include <linux/jiffies.h>
28 #include <linux/list.h>
29 #include <linux/platform_device.h>
31 #include <plat/display.h>
34 static LIST_HEAD(display_list);
36 static ssize_t display_enabled_show(struct device *dev,
37 struct device_attribute *attr, char *buf)
39 struct omap_dss_device *dssdev = to_dss_device(dev);
40 bool enabled = dssdev->state != OMAP_DSS_DISPLAY_DISABLED;
42 return snprintf(buf, PAGE_SIZE, "%d\n", enabled);
45 static ssize_t display_enabled_store(struct device *dev,
46 struct device_attribute *attr,
47 const char *buf, size_t size)
49 struct omap_dss_device *dssdev = to_dss_device(dev);
52 enabled = simple_strtoul(buf, NULL, 10);
54 if (enabled != (dssdev->state != OMAP_DSS_DISPLAY_DISABLED)) {
56 r = dssdev->driver->enable(dssdev);
60 dssdev->driver->disable(dssdev);
67 static ssize_t display_upd_mode_show(struct device *dev,
68 struct device_attribute *attr, char *buf)
70 struct omap_dss_device *dssdev = to_dss_device(dev);
71 enum omap_dss_update_mode mode = OMAP_DSS_UPDATE_AUTO;
72 if (dssdev->driver->get_update_mode)
73 mode = dssdev->driver->get_update_mode(dssdev);
74 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
77 static ssize_t display_upd_mode_store(struct device *dev,
78 struct device_attribute *attr,
79 const char *buf, size_t size)
81 struct omap_dss_device *dssdev = to_dss_device(dev);
83 enum omap_dss_update_mode mode;
85 if (!dssdev->driver->set_update_mode)
88 val = simple_strtoul(buf, NULL, 10);
91 case OMAP_DSS_UPDATE_DISABLED:
92 case OMAP_DSS_UPDATE_AUTO:
93 case OMAP_DSS_UPDATE_MANUAL:
94 mode = (enum omap_dss_update_mode)val;
100 r = dssdev->driver->set_update_mode(dssdev, mode);
107 static ssize_t display_tear_show(struct device *dev,
108 struct device_attribute *attr, char *buf)
110 struct omap_dss_device *dssdev = to_dss_device(dev);
111 return snprintf(buf, PAGE_SIZE, "%d\n",
112 dssdev->driver->get_te ?
113 dssdev->driver->get_te(dssdev) : 0);
116 static ssize_t display_tear_store(struct device *dev,
117 struct device_attribute *attr, const char *buf, size_t size)
119 struct omap_dss_device *dssdev = to_dss_device(dev);
123 if (!dssdev->driver->enable_te || !dssdev->driver->get_te)
126 te = simple_strtoul(buf, NULL, 0);
128 r = dssdev->driver->enable_te(dssdev, te);
135 static ssize_t display_timings_show(struct device *dev,
136 struct device_attribute *attr, char *buf)
138 struct omap_dss_device *dssdev = to_dss_device(dev);
139 struct omap_video_timings t;
141 if (!dssdev->driver->get_timings)
144 dssdev->driver->get_timings(dssdev, &t);
146 return snprintf(buf, PAGE_SIZE, "%u,%u/%u/%u/%u,%u/%u/%u/%u\n",
148 t.x_res, t.hfp, t.hbp, t.hsw,
149 t.y_res, t.vfp, t.vbp, t.vsw);
152 static ssize_t display_timings_store(struct device *dev,
153 struct device_attribute *attr, const char *buf, size_t size)
155 struct omap_dss_device *dssdev = to_dss_device(dev);
156 struct omap_video_timings t;
159 if (!dssdev->driver->set_timings || !dssdev->driver->check_timings)
163 #ifdef CONFIG_OMAP2_DSS_VENC
164 if (strncmp("pal", buf, 3) == 0) {
165 t = omap_dss_pal_timings;
167 } else if (strncmp("ntsc", buf, 4) == 0) {
168 t = omap_dss_ntsc_timings;
172 if (!found && sscanf(buf, "%u,%hu/%hu/%hu/%hu,%hu/%hu/%hu/%hu",
174 &t.x_res, &t.hfp, &t.hbp, &t.hsw,
175 &t.y_res, &t.vfp, &t.vbp, &t.vsw) != 9)
178 r = dssdev->driver->check_timings(dssdev, &t);
182 dssdev->driver->set_timings(dssdev, &t);
187 static ssize_t display_rotate_show(struct device *dev,
188 struct device_attribute *attr, char *buf)
190 struct omap_dss_device *dssdev = to_dss_device(dev);
192 if (!dssdev->driver->get_rotate)
194 rotate = dssdev->driver->get_rotate(dssdev);
195 return snprintf(buf, PAGE_SIZE, "%u\n", rotate);
198 static ssize_t display_rotate_store(struct device *dev,
199 struct device_attribute *attr, const char *buf, size_t size)
201 struct omap_dss_device *dssdev = to_dss_device(dev);
205 if (!dssdev->driver->set_rotate || !dssdev->driver->get_rotate)
208 rot = simple_strtoul(buf, NULL, 0);
210 r = dssdev->driver->set_rotate(dssdev, rot);
217 static ssize_t display_mirror_show(struct device *dev,
218 struct device_attribute *attr, char *buf)
220 struct omap_dss_device *dssdev = to_dss_device(dev);
222 if (!dssdev->driver->get_mirror)
224 mirror = dssdev->driver->get_mirror(dssdev);
225 return snprintf(buf, PAGE_SIZE, "%u\n", mirror);
228 static ssize_t display_mirror_store(struct device *dev,
229 struct device_attribute *attr, const char *buf, size_t size)
231 struct omap_dss_device *dssdev = to_dss_device(dev);
232 unsigned long mirror;
235 if (!dssdev->driver->set_mirror || !dssdev->driver->get_mirror)
238 mirror = simple_strtoul(buf, NULL, 0);
240 r = dssdev->driver->set_mirror(dssdev, mirror);
247 static ssize_t display_wss_show(struct device *dev,
248 struct device_attribute *attr, char *buf)
250 struct omap_dss_device *dssdev = to_dss_device(dev);
253 if (!dssdev->driver->get_wss)
256 wss = dssdev->driver->get_wss(dssdev);
258 return snprintf(buf, PAGE_SIZE, "0x%05x\n", wss);
261 static ssize_t display_wss_store(struct device *dev,
262 struct device_attribute *attr, const char *buf, size_t size)
264 struct omap_dss_device *dssdev = to_dss_device(dev);
268 if (!dssdev->driver->get_wss || !dssdev->driver->set_wss)
271 if (strict_strtoul(buf, 0, &wss))
277 r = dssdev->driver->set_wss(dssdev, wss);
284 static DEVICE_ATTR(enabled, S_IRUGO|S_IWUSR,
285 display_enabled_show, display_enabled_store);
286 static DEVICE_ATTR(update_mode, S_IRUGO|S_IWUSR,
287 display_upd_mode_show, display_upd_mode_store);
288 static DEVICE_ATTR(tear_elim, S_IRUGO|S_IWUSR,
289 display_tear_show, display_tear_store);
290 static DEVICE_ATTR(timings, S_IRUGO|S_IWUSR,
291 display_timings_show, display_timings_store);
292 static DEVICE_ATTR(rotate, S_IRUGO|S_IWUSR,
293 display_rotate_show, display_rotate_store);
294 static DEVICE_ATTR(mirror, S_IRUGO|S_IWUSR,
295 display_mirror_show, display_mirror_store);
296 static DEVICE_ATTR(wss, S_IRUGO|S_IWUSR,
297 display_wss_show, display_wss_store);
299 static struct device_attribute *display_sysfs_attrs[] = {
301 &dev_attr_update_mode,
310 void omapdss_default_get_resolution(struct omap_dss_device *dssdev,
311 u16 *xres, u16 *yres)
313 *xres = dssdev->panel.timings.x_res;
314 *yres = dssdev->panel.timings.y_res;
316 EXPORT_SYMBOL(omapdss_default_get_resolution);
318 void default_get_overlay_fifo_thresholds(enum omap_plane plane,
319 u32 fifo_size, enum omap_burst_size *burst_size,
320 u32 *fifo_low, u32 *fifo_high)
322 unsigned burst_size_bytes;
324 *burst_size = OMAP_DSS_BURST_16x32;
325 burst_size_bytes = 16 * 32 / 8;
327 *fifo_high = fifo_size - 1;
328 *fifo_low = fifo_size - burst_size_bytes;
331 int omapdss_default_get_recommended_bpp(struct omap_dss_device *dssdev)
333 switch (dssdev->type) {
334 case OMAP_DISPLAY_TYPE_DPI:
335 if (dssdev->phy.dpi.data_lines == 24)
340 case OMAP_DISPLAY_TYPE_DBI:
341 case OMAP_DISPLAY_TYPE_DSI:
342 if (dssdev->ctrl.pixel_size == 24)
346 case OMAP_DISPLAY_TYPE_VENC:
347 case OMAP_DISPLAY_TYPE_SDI:
353 EXPORT_SYMBOL(omapdss_default_get_recommended_bpp);
355 /* Checks if replication logic should be used. Only use for active matrix,
356 * when overlay is in RGB12U or RGB16 mode, and LCD interface is
358 bool dss_use_replication(struct omap_dss_device *dssdev,
359 enum omap_color_mode mode)
363 if (mode != OMAP_DSS_COLOR_RGB12U && mode != OMAP_DSS_COLOR_RGB16)
366 if (dssdev->type == OMAP_DISPLAY_TYPE_DPI &&
367 (dssdev->panel.config & OMAP_DSS_LCD_TFT) == 0)
370 switch (dssdev->type) {
371 case OMAP_DISPLAY_TYPE_DPI:
372 bpp = dssdev->phy.dpi.data_lines;
374 case OMAP_DISPLAY_TYPE_VENC:
375 case OMAP_DISPLAY_TYPE_SDI:
378 case OMAP_DISPLAY_TYPE_DBI:
379 case OMAP_DISPLAY_TYPE_DSI:
380 bpp = dssdev->ctrl.pixel_size;
389 void dss_init_device(struct platform_device *pdev,
390 struct omap_dss_device *dssdev)
392 struct device_attribute *attr;
396 switch (dssdev->type) {
397 #ifdef CONFIG_OMAP2_DSS_DPI
398 case OMAP_DISPLAY_TYPE_DPI:
400 #ifdef CONFIG_OMAP2_DSS_RFBI
401 case OMAP_DISPLAY_TYPE_DBI:
403 #ifdef CONFIG_OMAP2_DSS_SDI
404 case OMAP_DISPLAY_TYPE_SDI:
406 #ifdef CONFIG_OMAP2_DSS_DSI
407 case OMAP_DISPLAY_TYPE_DSI:
409 #ifdef CONFIG_OMAP2_DSS_VENC
410 case OMAP_DISPLAY_TYPE_VENC:
414 DSSERR("Support for display '%s' not compiled in.\n",
419 switch (dssdev->type) {
420 #ifdef CONFIG_OMAP2_DSS_DPI
421 case OMAP_DISPLAY_TYPE_DPI:
422 r = dpi_init_display(dssdev);
425 #ifdef CONFIG_OMAP2_DSS_RFBI
426 case OMAP_DISPLAY_TYPE_DBI:
427 r = rfbi_init_display(dssdev);
430 #ifdef CONFIG_OMAP2_DSS_VENC
431 case OMAP_DISPLAY_TYPE_VENC:
432 r = venc_init_display(dssdev);
435 #ifdef CONFIG_OMAP2_DSS_SDI
436 case OMAP_DISPLAY_TYPE_SDI:
437 r = sdi_init_display(dssdev);
440 #ifdef CONFIG_OMAP2_DSS_DSI
441 case OMAP_DISPLAY_TYPE_DSI:
442 r = dsi_init_display(dssdev);
450 DSSERR("failed to init display %s\n", dssdev->name);
454 /* create device sysfs files */
456 while ((attr = display_sysfs_attrs[i++]) != NULL) {
457 r = device_create_file(&dssdev->dev, attr);
459 DSSERR("failed to create sysfs file\n");
462 /* create display? sysfs links */
463 r = sysfs_create_link(&pdev->dev.kobj, &dssdev->dev.kobj,
464 dev_name(&dssdev->dev));
466 DSSERR("failed to create sysfs display link\n");
469 void dss_uninit_device(struct platform_device *pdev,
470 struct omap_dss_device *dssdev)
472 struct device_attribute *attr;
475 sysfs_remove_link(&pdev->dev.kobj, dev_name(&dssdev->dev));
477 while ((attr = display_sysfs_attrs[i++]) != NULL)
478 device_remove_file(&dssdev->dev, attr);
481 dssdev->manager->unset_device(dssdev->manager);
484 static int dss_suspend_device(struct device *dev, void *data)
487 struct omap_dss_device *dssdev = to_dss_device(dev);
489 if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) {
490 dssdev->activate_after_resume = false;
494 if (!dssdev->driver->suspend) {
495 DSSERR("display '%s' doesn't implement suspend\n",
500 r = dssdev->driver->suspend(dssdev);
504 dssdev->activate_after_resume = true;
509 int dss_suspend_all_devices(void)
512 struct bus_type *bus = dss_get_bus();
514 r = bus_for_each_dev(bus, NULL, NULL, dss_suspend_device);
516 /* resume all displays that were suspended */
517 dss_resume_all_devices();
524 static int dss_resume_device(struct device *dev, void *data)
527 struct omap_dss_device *dssdev = to_dss_device(dev);
529 if (dssdev->activate_after_resume && dssdev->driver->resume) {
530 r = dssdev->driver->resume(dssdev);
535 dssdev->activate_after_resume = false;
540 int dss_resume_all_devices(void)
542 struct bus_type *bus = dss_get_bus();
544 return bus_for_each_dev(bus, NULL, NULL, dss_resume_device);
547 static int dss_disable_device(struct device *dev, void *data)
549 struct omap_dss_device *dssdev = to_dss_device(dev);
551 if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED)
552 dssdev->driver->disable(dssdev);
557 void dss_disable_all_devices(void)
559 struct bus_type *bus = dss_get_bus();
560 bus_for_each_dev(bus, NULL, NULL, dss_disable_device);
564 void omap_dss_get_device(struct omap_dss_device *dssdev)
566 get_device(&dssdev->dev);
568 EXPORT_SYMBOL(omap_dss_get_device);
570 void omap_dss_put_device(struct omap_dss_device *dssdev)
572 put_device(&dssdev->dev);
574 EXPORT_SYMBOL(omap_dss_put_device);
576 /* ref count of the found device is incremented. ref count
577 * of from-device is decremented. */
578 struct omap_dss_device *omap_dss_get_next_device(struct omap_dss_device *from)
581 struct device *dev_start = NULL;
582 struct omap_dss_device *dssdev = NULL;
584 int match(struct device *dev, void *data)
590 dev_start = &from->dev;
591 dev = bus_find_device(dss_get_bus(), dev_start, NULL, match);
593 dssdev = to_dss_device(dev);
595 put_device(&from->dev);
599 EXPORT_SYMBOL(omap_dss_get_next_device);
601 struct omap_dss_device *omap_dss_find_device(void *data,
602 int (*match)(struct omap_dss_device *dssdev, void *data))
604 struct omap_dss_device *dssdev = NULL;
606 while ((dssdev = omap_dss_get_next_device(dssdev)) != NULL) {
607 if (match(dssdev, data))
613 EXPORT_SYMBOL(omap_dss_find_device);
615 int omap_dss_start_device(struct omap_dss_device *dssdev)
617 if (!dssdev->driver) {
618 DSSDBG("no driver\n");
622 if (!try_module_get(dssdev->dev.driver->owner)) {
628 EXPORT_SYMBOL(omap_dss_start_device);
630 void omap_dss_stop_device(struct omap_dss_device *dssdev)
632 module_put(dssdev->dev.driver->owner);
634 EXPORT_SYMBOL(omap_dss_stop_device);