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/platform_device.h>
30 #include <video/omapdss.h>
32 #include "dss_features.h"
34 static ssize_t display_enabled_show(struct device *dev,
35 struct device_attribute *attr, char *buf)
37 struct omap_dss_device *dssdev = to_dss_device(dev);
38 bool enabled = dssdev->state != OMAP_DSS_DISPLAY_DISABLED;
40 return snprintf(buf, PAGE_SIZE, "%d\n", enabled);
43 static ssize_t display_enabled_store(struct device *dev,
44 struct device_attribute *attr,
45 const char *buf, size_t size)
47 struct omap_dss_device *dssdev = to_dss_device(dev);
51 r = strtobool(buf, &enabled);
55 if (enabled != (dssdev->state != OMAP_DSS_DISPLAY_DISABLED)) {
57 r = dssdev->driver->enable(dssdev);
61 dssdev->driver->disable(dssdev);
68 static ssize_t display_tear_show(struct device *dev,
69 struct device_attribute *attr, char *buf)
71 struct omap_dss_device *dssdev = to_dss_device(dev);
72 return snprintf(buf, PAGE_SIZE, "%d\n",
73 dssdev->driver->get_te ?
74 dssdev->driver->get_te(dssdev) : 0);
77 static ssize_t display_tear_store(struct device *dev,
78 struct device_attribute *attr, const char *buf, size_t size)
80 struct omap_dss_device *dssdev = to_dss_device(dev);
84 if (!dssdev->driver->enable_te || !dssdev->driver->get_te)
87 r = strtobool(buf, &te);
91 r = dssdev->driver->enable_te(dssdev, te);
98 static ssize_t display_timings_show(struct device *dev,
99 struct device_attribute *attr, char *buf)
101 struct omap_dss_device *dssdev = to_dss_device(dev);
102 struct omap_video_timings t;
104 if (!dssdev->driver->get_timings)
107 dssdev->driver->get_timings(dssdev, &t);
109 return snprintf(buf, PAGE_SIZE, "%u,%u/%u/%u/%u,%u/%u/%u/%u\n",
111 t.x_res, t.hfp, t.hbp, t.hsw,
112 t.y_res, t.vfp, t.vbp, t.vsw);
115 static ssize_t display_timings_store(struct device *dev,
116 struct device_attribute *attr, const char *buf, size_t size)
118 struct omap_dss_device *dssdev = to_dss_device(dev);
119 struct omap_video_timings t;
122 if (!dssdev->driver->set_timings || !dssdev->driver->check_timings)
126 #ifdef CONFIG_OMAP2_DSS_VENC
127 if (strncmp("pal", buf, 3) == 0) {
128 t = omap_dss_pal_timings;
130 } else if (strncmp("ntsc", buf, 4) == 0) {
131 t = omap_dss_ntsc_timings;
135 if (!found && sscanf(buf, "%u,%hu/%hu/%hu/%hu,%hu/%hu/%hu/%hu",
137 &t.x_res, &t.hfp, &t.hbp, &t.hsw,
138 &t.y_res, &t.vfp, &t.vbp, &t.vsw) != 9)
141 r = dssdev->driver->check_timings(dssdev, &t);
145 dssdev->driver->set_timings(dssdev, &t);
150 static ssize_t display_rotate_show(struct device *dev,
151 struct device_attribute *attr, char *buf)
153 struct omap_dss_device *dssdev = to_dss_device(dev);
155 if (!dssdev->driver->get_rotate)
157 rotate = dssdev->driver->get_rotate(dssdev);
158 return snprintf(buf, PAGE_SIZE, "%u\n", rotate);
161 static ssize_t display_rotate_store(struct device *dev,
162 struct device_attribute *attr, const char *buf, size_t size)
164 struct omap_dss_device *dssdev = to_dss_device(dev);
167 if (!dssdev->driver->set_rotate || !dssdev->driver->get_rotate)
170 r = kstrtoint(buf, 0, &rot);
174 r = dssdev->driver->set_rotate(dssdev, rot);
181 static ssize_t display_mirror_show(struct device *dev,
182 struct device_attribute *attr, char *buf)
184 struct omap_dss_device *dssdev = to_dss_device(dev);
186 if (!dssdev->driver->get_mirror)
188 mirror = dssdev->driver->get_mirror(dssdev);
189 return snprintf(buf, PAGE_SIZE, "%u\n", mirror);
192 static ssize_t display_mirror_store(struct device *dev,
193 struct device_attribute *attr, const char *buf, size_t size)
195 struct omap_dss_device *dssdev = to_dss_device(dev);
199 if (!dssdev->driver->set_mirror || !dssdev->driver->get_mirror)
202 r = strtobool(buf, &mirror);
206 r = dssdev->driver->set_mirror(dssdev, mirror);
213 static ssize_t display_wss_show(struct device *dev,
214 struct device_attribute *attr, char *buf)
216 struct omap_dss_device *dssdev = to_dss_device(dev);
219 if (!dssdev->driver->get_wss)
222 wss = dssdev->driver->get_wss(dssdev);
224 return snprintf(buf, PAGE_SIZE, "0x%05x\n", wss);
227 static ssize_t display_wss_store(struct device *dev,
228 struct device_attribute *attr, const char *buf, size_t size)
230 struct omap_dss_device *dssdev = to_dss_device(dev);
234 if (!dssdev->driver->get_wss || !dssdev->driver->set_wss)
237 r = kstrtou32(buf, 0, &wss);
244 r = dssdev->driver->set_wss(dssdev, wss);
251 static DEVICE_ATTR(enabled, S_IRUGO|S_IWUSR,
252 display_enabled_show, display_enabled_store);
253 static DEVICE_ATTR(tear_elim, S_IRUGO|S_IWUSR,
254 display_tear_show, display_tear_store);
255 static DEVICE_ATTR(timings, S_IRUGO|S_IWUSR,
256 display_timings_show, display_timings_store);
257 static DEVICE_ATTR(rotate, S_IRUGO|S_IWUSR,
258 display_rotate_show, display_rotate_store);
259 static DEVICE_ATTR(mirror, S_IRUGO|S_IWUSR,
260 display_mirror_show, display_mirror_store);
261 static DEVICE_ATTR(wss, S_IRUGO|S_IWUSR,
262 display_wss_show, display_wss_store);
264 static struct device_attribute *display_sysfs_attrs[] = {
274 void omapdss_default_get_resolution(struct omap_dss_device *dssdev,
275 u16 *xres, u16 *yres)
277 *xres = dssdev->panel.timings.x_res;
278 *yres = dssdev->panel.timings.y_res;
280 EXPORT_SYMBOL(omapdss_default_get_resolution);
282 int omapdss_default_get_recommended_bpp(struct omap_dss_device *dssdev)
284 switch (dssdev->type) {
285 case OMAP_DISPLAY_TYPE_DPI:
286 if (dssdev->phy.dpi.data_lines == 24)
291 case OMAP_DISPLAY_TYPE_DBI:
292 if (dssdev->ctrl.pixel_size == 24)
296 case OMAP_DISPLAY_TYPE_DSI:
297 if (dsi_get_pixel_size(dssdev->panel.dsi_pix_fmt) > 16)
301 case OMAP_DISPLAY_TYPE_VENC:
302 case OMAP_DISPLAY_TYPE_SDI:
303 case OMAP_DISPLAY_TYPE_HDMI:
310 EXPORT_SYMBOL(omapdss_default_get_recommended_bpp);
312 void omapdss_default_get_timings(struct omap_dss_device *dssdev,
313 struct omap_video_timings *timings)
315 *timings = dssdev->panel.timings;
317 EXPORT_SYMBOL(omapdss_default_get_timings);
319 /* Checks if replication logic should be used. Only use for active matrix,
320 * when overlay is in RGB12U or RGB16 mode, and LCD interface is
322 bool dss_use_replication(struct omap_dss_device *dssdev,
323 enum omap_color_mode mode)
327 if (mode != OMAP_DSS_COLOR_RGB12U && mode != OMAP_DSS_COLOR_RGB16)
330 if (dssdev->type == OMAP_DISPLAY_TYPE_DPI &&
331 (dssdev->panel.config & OMAP_DSS_LCD_TFT) == 0)
334 switch (dssdev->type) {
335 case OMAP_DISPLAY_TYPE_DPI:
336 bpp = dssdev->phy.dpi.data_lines;
338 case OMAP_DISPLAY_TYPE_HDMI:
339 case OMAP_DISPLAY_TYPE_VENC:
340 case OMAP_DISPLAY_TYPE_SDI:
343 case OMAP_DISPLAY_TYPE_DBI:
344 bpp = dssdev->ctrl.pixel_size;
346 case OMAP_DISPLAY_TYPE_DSI:
347 bpp = dsi_get_pixel_size(dssdev->panel.dsi_pix_fmt);
357 void dss_init_device(struct platform_device *pdev,
358 struct omap_dss_device *dssdev)
360 struct device_attribute *attr;
364 /* create device sysfs files */
366 while ((attr = display_sysfs_attrs[i++]) != NULL) {
367 r = device_create_file(&dssdev->dev, attr);
369 DSSERR("failed to create sysfs file\n");
372 /* create display? sysfs links */
373 r = sysfs_create_link(&pdev->dev.kobj, &dssdev->dev.kobj,
374 dev_name(&dssdev->dev));
376 DSSERR("failed to create sysfs display link\n");
379 void dss_uninit_device(struct platform_device *pdev,
380 struct omap_dss_device *dssdev)
382 struct device_attribute *attr;
385 sysfs_remove_link(&pdev->dev.kobj, dev_name(&dssdev->dev));
387 while ((attr = display_sysfs_attrs[i++]) != NULL)
388 device_remove_file(&dssdev->dev, attr);
391 dssdev->manager->unset_device(dssdev->manager);
394 static int dss_suspend_device(struct device *dev, void *data)
397 struct omap_dss_device *dssdev = to_dss_device(dev);
399 if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) {
400 dssdev->activate_after_resume = false;
404 if (!dssdev->driver->suspend) {
405 DSSERR("display '%s' doesn't implement suspend\n",
410 r = dssdev->driver->suspend(dssdev);
414 dssdev->activate_after_resume = true;
419 int dss_suspend_all_devices(void)
422 struct bus_type *bus = dss_get_bus();
424 r = bus_for_each_dev(bus, NULL, NULL, dss_suspend_device);
426 /* resume all displays that were suspended */
427 dss_resume_all_devices();
434 static int dss_resume_device(struct device *dev, void *data)
437 struct omap_dss_device *dssdev = to_dss_device(dev);
439 if (dssdev->activate_after_resume && dssdev->driver->resume) {
440 r = dssdev->driver->resume(dssdev);
445 dssdev->activate_after_resume = false;
450 int dss_resume_all_devices(void)
452 struct bus_type *bus = dss_get_bus();
454 return bus_for_each_dev(bus, NULL, NULL, dss_resume_device);
457 static int dss_disable_device(struct device *dev, void *data)
459 struct omap_dss_device *dssdev = to_dss_device(dev);
461 if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED)
462 dssdev->driver->disable(dssdev);
467 void dss_disable_all_devices(void)
469 struct bus_type *bus = dss_get_bus();
470 bus_for_each_dev(bus, NULL, NULL, dss_disable_device);
474 void omap_dss_get_device(struct omap_dss_device *dssdev)
476 get_device(&dssdev->dev);
478 EXPORT_SYMBOL(omap_dss_get_device);
480 void omap_dss_put_device(struct omap_dss_device *dssdev)
482 put_device(&dssdev->dev);
484 EXPORT_SYMBOL(omap_dss_put_device);
486 /* ref count of the found device is incremented. ref count
487 * of from-device is decremented. */
488 struct omap_dss_device *omap_dss_get_next_device(struct omap_dss_device *from)
491 struct device *dev_start = NULL;
492 struct omap_dss_device *dssdev = NULL;
494 int match(struct device *dev, void *data)
500 dev_start = &from->dev;
501 dev = bus_find_device(dss_get_bus(), dev_start, NULL, match);
503 dssdev = to_dss_device(dev);
505 put_device(&from->dev);
509 EXPORT_SYMBOL(omap_dss_get_next_device);
511 struct omap_dss_device *omap_dss_find_device(void *data,
512 int (*match)(struct omap_dss_device *dssdev, void *data))
514 struct omap_dss_device *dssdev = NULL;
516 while ((dssdev = omap_dss_get_next_device(dssdev)) != NULL) {
517 if (match(dssdev, data))
523 EXPORT_SYMBOL(omap_dss_find_device);
525 int omap_dss_start_device(struct omap_dss_device *dssdev)
527 if (!dssdev->driver) {
528 DSSDBG("no driver\n");
532 if (!try_module_get(dssdev->dev.driver->owner)) {
538 EXPORT_SYMBOL(omap_dss_start_device);
540 void omap_dss_stop_device(struct omap_dss_device *dssdev)
542 module_put(dssdev->dev.driver->owner);
544 EXPORT_SYMBOL(omap_dss_stop_device);