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 val = simple_strtoul(buf, NULL, 10);
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;
97 r = dssdev->driver->set_update_mode(dssdev, mode);
104 static ssize_t display_tear_show(struct device *dev,
105 struct device_attribute *attr, char *buf)
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);
113 static ssize_t display_tear_store(struct device *dev,
114 struct device_attribute *attr, const char *buf, size_t size)
116 struct omap_dss_device *dssdev = to_dss_device(dev);
120 if (!dssdev->driver->enable_te || !dssdev->driver->get_te)
123 te = simple_strtoul(buf, NULL, 0);
125 r = dssdev->driver->enable_te(dssdev, te);
132 static ssize_t display_timings_show(struct device *dev,
133 struct device_attribute *attr, char *buf)
135 struct omap_dss_device *dssdev = to_dss_device(dev);
136 struct omap_video_timings t;
138 if (!dssdev->driver->get_timings)
141 dssdev->driver->get_timings(dssdev, &t);
143 return snprintf(buf, PAGE_SIZE, "%u,%u/%u/%u/%u,%u/%u/%u/%u\n",
145 t.x_res, t.hfp, t.hbp, t.hsw,
146 t.y_res, t.vfp, t.vbp, t.vsw);
149 static ssize_t display_timings_store(struct device *dev,
150 struct device_attribute *attr, const char *buf, size_t size)
152 struct omap_dss_device *dssdev = to_dss_device(dev);
153 struct omap_video_timings t;
156 if (!dssdev->driver->set_timings || !dssdev->driver->check_timings)
160 #ifdef CONFIG_OMAP2_DSS_VENC
161 if (strncmp("pal", buf, 3) == 0) {
162 t = omap_dss_pal_timings;
164 } else if (strncmp("ntsc", buf, 4) == 0) {
165 t = omap_dss_ntsc_timings;
169 if (!found && sscanf(buf, "%u,%hu/%hu/%hu/%hu,%hu/%hu/%hu/%hu",
171 &t.x_res, &t.hfp, &t.hbp, &t.hsw,
172 &t.y_res, &t.vfp, &t.vbp, &t.vsw) != 9)
175 r = dssdev->driver->check_timings(dssdev, &t);
179 dssdev->driver->set_timings(dssdev, &t);
184 static ssize_t display_rotate_show(struct device *dev,
185 struct device_attribute *attr, char *buf)
187 struct omap_dss_device *dssdev = to_dss_device(dev);
189 if (!dssdev->driver->get_rotate)
191 rotate = dssdev->driver->get_rotate(dssdev);
192 return snprintf(buf, PAGE_SIZE, "%u\n", rotate);
195 static ssize_t display_rotate_store(struct device *dev,
196 struct device_attribute *attr, const char *buf, size_t size)
198 struct omap_dss_device *dssdev = to_dss_device(dev);
202 if (!dssdev->driver->set_rotate || !dssdev->driver->get_rotate)
205 rot = simple_strtoul(buf, NULL, 0);
207 r = dssdev->driver->set_rotate(dssdev, rot);
214 static ssize_t display_mirror_show(struct device *dev,
215 struct device_attribute *attr, char *buf)
217 struct omap_dss_device *dssdev = to_dss_device(dev);
219 if (!dssdev->driver->get_mirror)
221 mirror = dssdev->driver->get_mirror(dssdev);
222 return snprintf(buf, PAGE_SIZE, "%u\n", mirror);
225 static ssize_t display_mirror_store(struct device *dev,
226 struct device_attribute *attr, const char *buf, size_t size)
228 struct omap_dss_device *dssdev = to_dss_device(dev);
229 unsigned long mirror;
232 if (!dssdev->driver->set_mirror || !dssdev->driver->get_mirror)
235 mirror = simple_strtoul(buf, NULL, 0);
237 r = dssdev->driver->set_mirror(dssdev, mirror);
244 static ssize_t display_wss_show(struct device *dev,
245 struct device_attribute *attr, char *buf)
247 struct omap_dss_device *dssdev = to_dss_device(dev);
250 if (!dssdev->driver->get_wss)
253 wss = dssdev->driver->get_wss(dssdev);
255 return snprintf(buf, PAGE_SIZE, "0x%05x\n", wss);
258 static ssize_t display_wss_store(struct device *dev,
259 struct device_attribute *attr, const char *buf, size_t size)
261 struct omap_dss_device *dssdev = to_dss_device(dev);
265 if (!dssdev->driver->get_wss || !dssdev->driver->set_wss)
268 if (strict_strtoul(buf, 0, &wss))
274 r = dssdev->driver->set_wss(dssdev, wss);
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);
296 static struct device_attribute *display_sysfs_attrs[] = {
298 &dev_attr_update_mode,
307 void omapdss_default_get_resolution(struct omap_dss_device *dssdev,
308 u16 *xres, u16 *yres)
310 *xres = dssdev->panel.timings.x_res;
311 *yres = dssdev->panel.timings.y_res;
313 EXPORT_SYMBOL(omapdss_default_get_resolution);
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)
319 unsigned burst_size_bytes;
321 *burst_size = OMAP_DSS_BURST_16x32;
322 burst_size_bytes = 16 * 32 / 8;
324 *fifo_high = fifo_size - 1;
325 *fifo_low = fifo_size - burst_size_bytes;
328 int omapdss_default_get_recommended_bpp(struct omap_dss_device *dssdev)
330 switch (dssdev->type) {
331 case OMAP_DISPLAY_TYPE_DPI:
332 if (dssdev->phy.dpi.data_lines == 24)
337 case OMAP_DISPLAY_TYPE_DBI:
338 case OMAP_DISPLAY_TYPE_DSI:
339 if (dssdev->ctrl.pixel_size == 24)
343 case OMAP_DISPLAY_TYPE_VENC:
344 case OMAP_DISPLAY_TYPE_SDI:
351 EXPORT_SYMBOL(omapdss_default_get_recommended_bpp);
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
356 bool dss_use_replication(struct omap_dss_device *dssdev,
357 enum omap_color_mode mode)
361 if (mode != OMAP_DSS_COLOR_RGB12U && mode != OMAP_DSS_COLOR_RGB16)
364 if (dssdev->type == OMAP_DISPLAY_TYPE_DPI &&
365 (dssdev->panel.config & OMAP_DSS_LCD_TFT) == 0)
368 switch (dssdev->type) {
369 case OMAP_DISPLAY_TYPE_DPI:
370 bpp = dssdev->phy.dpi.data_lines;
372 case OMAP_DISPLAY_TYPE_VENC:
373 case OMAP_DISPLAY_TYPE_SDI:
376 case OMAP_DISPLAY_TYPE_DBI:
377 case OMAP_DISPLAY_TYPE_DSI:
378 bpp = dssdev->ctrl.pixel_size;
387 void dss_init_device(struct platform_device *pdev,
388 struct omap_dss_device *dssdev)
390 struct device_attribute *attr;
394 switch (dssdev->type) {
395 #ifdef CONFIG_OMAP2_DSS_DPI
396 case OMAP_DISPLAY_TYPE_DPI:
398 #ifdef CONFIG_OMAP2_DSS_RFBI
399 case OMAP_DISPLAY_TYPE_DBI:
401 #ifdef CONFIG_OMAP2_DSS_SDI
402 case OMAP_DISPLAY_TYPE_SDI:
404 #ifdef CONFIG_OMAP2_DSS_DSI
405 case OMAP_DISPLAY_TYPE_DSI:
407 #ifdef CONFIG_OMAP2_DSS_VENC
408 case OMAP_DISPLAY_TYPE_VENC:
412 DSSERR("Support for display '%s' not compiled in.\n",
417 switch (dssdev->type) {
418 #ifdef CONFIG_OMAP2_DSS_DPI
419 case OMAP_DISPLAY_TYPE_DPI:
420 r = dpi_init_display(dssdev);
423 #ifdef CONFIG_OMAP2_DSS_RFBI
424 case OMAP_DISPLAY_TYPE_DBI:
425 r = rfbi_init_display(dssdev);
428 #ifdef CONFIG_OMAP2_DSS_VENC
429 case OMAP_DISPLAY_TYPE_VENC:
430 r = venc_init_display(dssdev);
433 #ifdef CONFIG_OMAP2_DSS_SDI
434 case OMAP_DISPLAY_TYPE_SDI:
435 r = sdi_init_display(dssdev);
438 #ifdef CONFIG_OMAP2_DSS_DSI
439 case OMAP_DISPLAY_TYPE_DSI:
440 r = dsi_init_display(dssdev);
448 DSSERR("failed to init display %s\n", dssdev->name);
452 /* create device sysfs files */
454 while ((attr = display_sysfs_attrs[i++]) != NULL) {
455 r = device_create_file(&dssdev->dev, attr);
457 DSSERR("failed to create sysfs file\n");
460 /* create display? sysfs links */
461 r = sysfs_create_link(&pdev->dev.kobj, &dssdev->dev.kobj,
462 dev_name(&dssdev->dev));
464 DSSERR("failed to create sysfs display link\n");
467 void dss_uninit_device(struct platform_device *pdev,
468 struct omap_dss_device *dssdev)
470 struct device_attribute *attr;
473 sysfs_remove_link(&pdev->dev.kobj, dev_name(&dssdev->dev));
475 while ((attr = display_sysfs_attrs[i++]) != NULL)
476 device_remove_file(&dssdev->dev, attr);
479 dssdev->manager->unset_device(dssdev->manager);
482 static int dss_suspend_device(struct device *dev, void *data)
485 struct omap_dss_device *dssdev = to_dss_device(dev);
487 if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) {
488 dssdev->activate_after_resume = false;
492 if (!dssdev->driver->suspend) {
493 DSSERR("display '%s' doesn't implement suspend\n",
498 r = dssdev->driver->suspend(dssdev);
502 dssdev->activate_after_resume = true;
507 int dss_suspend_all_devices(void)
510 struct bus_type *bus = dss_get_bus();
512 r = bus_for_each_dev(bus, NULL, NULL, dss_suspend_device);
514 /* resume all displays that were suspended */
515 dss_resume_all_devices();
522 static int dss_resume_device(struct device *dev, void *data)
525 struct omap_dss_device *dssdev = to_dss_device(dev);
527 if (dssdev->activate_after_resume && dssdev->driver->resume) {
528 r = dssdev->driver->resume(dssdev);
533 dssdev->activate_after_resume = false;
538 int dss_resume_all_devices(void)
540 struct bus_type *bus = dss_get_bus();
542 return bus_for_each_dev(bus, NULL, NULL, dss_resume_device);
545 static int dss_disable_device(struct device *dev, void *data)
547 struct omap_dss_device *dssdev = to_dss_device(dev);
548 dssdev->driver->disable(dssdev);
552 void dss_disable_all_devices(void)
554 struct bus_type *bus = dss_get_bus();
555 bus_for_each_dev(bus, NULL, NULL, dss_disable_device);
559 void omap_dss_get_device(struct omap_dss_device *dssdev)
561 get_device(&dssdev->dev);
563 EXPORT_SYMBOL(omap_dss_get_device);
565 void omap_dss_put_device(struct omap_dss_device *dssdev)
567 put_device(&dssdev->dev);
569 EXPORT_SYMBOL(omap_dss_put_device);
571 /* ref count of the found device is incremented. ref count
572 * of from-device is decremented. */
573 struct omap_dss_device *omap_dss_get_next_device(struct omap_dss_device *from)
576 struct device *dev_start = NULL;
577 struct omap_dss_device *dssdev = NULL;
579 int match(struct device *dev, void *data)
585 dev_start = &from->dev;
586 dev = bus_find_device(dss_get_bus(), dev_start, NULL, match);
588 dssdev = to_dss_device(dev);
590 put_device(&from->dev);
594 EXPORT_SYMBOL(omap_dss_get_next_device);
596 struct omap_dss_device *omap_dss_find_device(void *data,
597 int (*match)(struct omap_dss_device *dssdev, void *data))
599 struct omap_dss_device *dssdev = NULL;
601 while ((dssdev = omap_dss_get_next_device(dssdev)) != NULL) {
602 if (match(dssdev, data))
608 EXPORT_SYMBOL(omap_dss_find_device);
610 int omap_dss_start_device(struct omap_dss_device *dssdev)
612 if (!dssdev->driver) {
613 DSSDBG("no driver\n");
617 if (!try_module_get(dssdev->dev.driver->owner)) {
623 EXPORT_SYMBOL(omap_dss_start_device);
625 void omap_dss_stop_device(struct omap_dss_device *dssdev)
627 module_put(dssdev->dev.driver->owner);
629 EXPORT_SYMBOL(omap_dss_stop_device);