1 /*
2 * Copyright (C) 2009 Nokia Corporation
3 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
4 *
5 * Some code and ideas taken from drivers/video/omap/ driver
6 * by Imre Deak.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License version 2 as published by
10 * the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * this program. If not, see <http://www.gnu.org/licenses/>.
19 */
20
21 #define DSS_SUBSYS_NAME "DISPLAY"
22
23 #include <linux/kernel.h>
24 #include <linux/module.h>
25 #include <linux/platform_device.h>
26 #include <linux/sysfs.h>
27
28 #include <video/omapfb_dss.h>
29 #include "dss.h"
30
display_name_show(struct omap_dss_device * dssdev,char * buf)31 static ssize_t display_name_show(struct omap_dss_device *dssdev, char *buf)
32 {
33 return snprintf(buf, PAGE_SIZE, "%s\n",
34 dssdev->name ?
35 dssdev->name : "");
36 }
37
display_enabled_show(struct omap_dss_device * dssdev,char * buf)38 static ssize_t display_enabled_show(struct omap_dss_device *dssdev, char *buf)
39 {
40 return snprintf(buf, PAGE_SIZE, "%d\n",
41 omapdss_device_is_enabled(dssdev));
42 }
43
display_enabled_store(struct omap_dss_device * dssdev,const char * buf,size_t size)44 static ssize_t display_enabled_store(struct omap_dss_device *dssdev,
45 const char *buf, size_t size)
46 {
47 int r;
48 bool enable;
49
50 r = strtobool(buf, &enable);
51 if (r)
52 return r;
53
54 if (enable == omapdss_device_is_enabled(dssdev))
55 return size;
56
57 if (omapdss_device_is_connected(dssdev) == false)
58 return -ENODEV;
59
60 if (enable) {
61 r = dssdev->driver->enable(dssdev);
62 if (r)
63 return r;
64 } else {
65 dssdev->driver->disable(dssdev);
66 }
67
68 return size;
69 }
70
display_tear_show(struct omap_dss_device * dssdev,char * buf)71 static ssize_t display_tear_show(struct omap_dss_device *dssdev, char *buf)
72 {
73 return snprintf(buf, PAGE_SIZE, "%d\n",
74 dssdev->driver->get_te ?
75 dssdev->driver->get_te(dssdev) : 0);
76 }
77
display_tear_store(struct omap_dss_device * dssdev,const char * buf,size_t size)78 static ssize_t display_tear_store(struct omap_dss_device *dssdev,
79 const char *buf, size_t size)
80 {
81 int r;
82 bool te;
83
84 if (!dssdev->driver->enable_te || !dssdev->driver->get_te)
85 return -ENOENT;
86
87 r = strtobool(buf, &te);
88 if (r)
89 return r;
90
91 r = dssdev->driver->enable_te(dssdev, te);
92 if (r)
93 return r;
94
95 return size;
96 }
97
display_timings_show(struct omap_dss_device * dssdev,char * buf)98 static ssize_t display_timings_show(struct omap_dss_device *dssdev, char *buf)
99 {
100 struct omap_video_timings t;
101
102 if (!dssdev->driver->get_timings)
103 return -ENOENT;
104
105 dssdev->driver->get_timings(dssdev, &t);
106
107 return snprintf(buf, PAGE_SIZE, "%u,%u/%u/%u/%u,%u/%u/%u/%u\n",
108 t.pixelclock,
109 t.x_res, t.hfp, t.hbp, t.hsw,
110 t.y_res, t.vfp, t.vbp, t.vsw);
111 }
112
display_timings_store(struct omap_dss_device * dssdev,const char * buf,size_t size)113 static ssize_t display_timings_store(struct omap_dss_device *dssdev,
114 const char *buf, size_t size)
115 {
116 struct omap_video_timings t = dssdev->panel.timings;
117 int r, found;
118
119 if (!dssdev->driver->set_timings || !dssdev->driver->check_timings)
120 return -ENOENT;
121
122 found = 0;
123 #ifdef CONFIG_FB_OMAP2_DSS_VENC
124 if (strncmp("pal", buf, 3) == 0) {
125 t = omap_dss_pal_timings;
126 found = 1;
127 } else if (strncmp("ntsc", buf, 4) == 0) {
128 t = omap_dss_ntsc_timings;
129 found = 1;
130 }
131 #endif
132 if (!found && sscanf(buf, "%u,%hu/%hu/%hu/%hu,%hu/%hu/%hu/%hu",
133 &t.pixelclock,
134 &t.x_res, &t.hfp, &t.hbp, &t.hsw,
135 &t.y_res, &t.vfp, &t.vbp, &t.vsw) != 9)
136 return -EINVAL;
137
138 r = dssdev->driver->check_timings(dssdev, &t);
139 if (r)
140 return r;
141
142 dssdev->driver->disable(dssdev);
143 dssdev->driver->set_timings(dssdev, &t);
144 r = dssdev->driver->enable(dssdev);
145 if (r)
146 return r;
147
148 return size;
149 }
150
display_rotate_show(struct omap_dss_device * dssdev,char * buf)151 static ssize_t display_rotate_show(struct omap_dss_device *dssdev, char *buf)
152 {
153 int rotate;
154 if (!dssdev->driver->get_rotate)
155 return -ENOENT;
156 rotate = dssdev->driver->get_rotate(dssdev);
157 return snprintf(buf, PAGE_SIZE, "%u\n", rotate);
158 }
159
display_rotate_store(struct omap_dss_device * dssdev,const char * buf,size_t size)160 static ssize_t display_rotate_store(struct omap_dss_device *dssdev,
161 const char *buf, size_t size)
162 {
163 int rot, r;
164
165 if (!dssdev->driver->set_rotate || !dssdev->driver->get_rotate)
166 return -ENOENT;
167
168 r = kstrtoint(buf, 0, &rot);
169 if (r)
170 return r;
171
172 r = dssdev->driver->set_rotate(dssdev, rot);
173 if (r)
174 return r;
175
176 return size;
177 }
178
display_mirror_show(struct omap_dss_device * dssdev,char * buf)179 static ssize_t display_mirror_show(struct omap_dss_device *dssdev, char *buf)
180 {
181 int mirror;
182 if (!dssdev->driver->get_mirror)
183 return -ENOENT;
184 mirror = dssdev->driver->get_mirror(dssdev);
185 return snprintf(buf, PAGE_SIZE, "%u\n", mirror);
186 }
187
display_mirror_store(struct omap_dss_device * dssdev,const char * buf,size_t size)188 static ssize_t display_mirror_store(struct omap_dss_device *dssdev,
189 const char *buf, size_t size)
190 {
191 int r;
192 bool mirror;
193
194 if (!dssdev->driver->set_mirror || !dssdev->driver->get_mirror)
195 return -ENOENT;
196
197 r = strtobool(buf, &mirror);
198 if (r)
199 return r;
200
201 r = dssdev->driver->set_mirror(dssdev, mirror);
202 if (r)
203 return r;
204
205 return size;
206 }
207
display_wss_show(struct omap_dss_device * dssdev,char * buf)208 static ssize_t display_wss_show(struct omap_dss_device *dssdev, char *buf)
209 {
210 unsigned int wss;
211
212 if (!dssdev->driver->get_wss)
213 return -ENOENT;
214
215 wss = dssdev->driver->get_wss(dssdev);
216
217 return snprintf(buf, PAGE_SIZE, "0x%05x\n", wss);
218 }
219
display_wss_store(struct omap_dss_device * dssdev,const char * buf,size_t size)220 static ssize_t display_wss_store(struct omap_dss_device *dssdev,
221 const char *buf, size_t size)
222 {
223 u32 wss;
224 int r;
225
226 if (!dssdev->driver->get_wss || !dssdev->driver->set_wss)
227 return -ENOENT;
228
229 r = kstrtou32(buf, 0, &wss);
230 if (r)
231 return r;
232
233 if (wss > 0xfffff)
234 return -EINVAL;
235
236 r = dssdev->driver->set_wss(dssdev, wss);
237 if (r)
238 return r;
239
240 return size;
241 }
242
243 struct display_attribute {
244 struct attribute attr;
245 ssize_t (*show)(struct omap_dss_device *, char *);
246 ssize_t (*store)(struct omap_dss_device *, const char *, size_t);
247 };
248
249 #define DISPLAY_ATTR(_name, _mode, _show, _store) \
250 struct display_attribute display_attr_##_name = \
251 __ATTR(_name, _mode, _show, _store)
252
253 static DISPLAY_ATTR(name, S_IRUGO, display_name_show, NULL);
254 static DISPLAY_ATTR(display_name, S_IRUGO, display_name_show, NULL);
255 static DISPLAY_ATTR(enabled, S_IRUGO|S_IWUSR,
256 display_enabled_show, display_enabled_store);
257 static DISPLAY_ATTR(tear_elim, S_IRUGO|S_IWUSR,
258 display_tear_show, display_tear_store);
259 static DISPLAY_ATTR(timings, S_IRUGO|S_IWUSR,
260 display_timings_show, display_timings_store);
261 static DISPLAY_ATTR(rotate, S_IRUGO|S_IWUSR,
262 display_rotate_show, display_rotate_store);
263 static DISPLAY_ATTR(mirror, S_IRUGO|S_IWUSR,
264 display_mirror_show, display_mirror_store);
265 static DISPLAY_ATTR(wss, S_IRUGO|S_IWUSR,
266 display_wss_show, display_wss_store);
267
268 static struct attribute *display_sysfs_attrs[] = {
269 &display_attr_name.attr,
270 &display_attr_display_name.attr,
271 &display_attr_enabled.attr,
272 &display_attr_tear_elim.attr,
273 &display_attr_timings.attr,
274 &display_attr_rotate.attr,
275 &display_attr_mirror.attr,
276 &display_attr_wss.attr,
277 NULL
278 };
279
display_attr_show(struct kobject * kobj,struct attribute * attr,char * buf)280 static ssize_t display_attr_show(struct kobject *kobj, struct attribute *attr,
281 char *buf)
282 {
283 struct omap_dss_device *dssdev;
284 struct display_attribute *display_attr;
285
286 dssdev = container_of(kobj, struct omap_dss_device, kobj);
287 display_attr = container_of(attr, struct display_attribute, attr);
288
289 if (!display_attr->show)
290 return -ENOENT;
291
292 return display_attr->show(dssdev, buf);
293 }
294
display_attr_store(struct kobject * kobj,struct attribute * attr,const char * buf,size_t size)295 static ssize_t display_attr_store(struct kobject *kobj, struct attribute *attr,
296 const char *buf, size_t size)
297 {
298 struct omap_dss_device *dssdev;
299 struct display_attribute *display_attr;
300
301 dssdev = container_of(kobj, struct omap_dss_device, kobj);
302 display_attr = container_of(attr, struct display_attribute, attr);
303
304 if (!display_attr->store)
305 return -ENOENT;
306
307 return display_attr->store(dssdev, buf, size);
308 }
309
310 static const struct sysfs_ops display_sysfs_ops = {
311 .show = display_attr_show,
312 .store = display_attr_store,
313 };
314
315 static struct kobj_type display_ktype = {
316 .sysfs_ops = &display_sysfs_ops,
317 .default_attrs = display_sysfs_attrs,
318 };
319
display_init_sysfs(struct platform_device * pdev)320 int display_init_sysfs(struct platform_device *pdev)
321 {
322 struct omap_dss_device *dssdev = NULL;
323 int r;
324
325 for_each_dss_dev(dssdev) {
326 r = kobject_init_and_add(&dssdev->kobj, &display_ktype,
327 &pdev->dev.kobj, "%s", dssdev->alias);
328 if (r) {
329 DSSERR("failed to create sysfs files\n");
330 omap_dss_put_device(dssdev);
331 goto err;
332 }
333 }
334
335 return 0;
336
337 err:
338 display_uninit_sysfs(pdev);
339
340 return r;
341 }
342
display_uninit_sysfs(struct platform_device * pdev)343 void display_uninit_sysfs(struct platform_device *pdev)
344 {
345 struct omap_dss_device *dssdev = NULL;
346
347 for_each_dss_dev(dssdev) {
348 if (kobject_name(&dssdev->kobj) == NULL)
349 continue;
350
351 kobject_del(&dssdev->kobj);
352 kobject_put(&dssdev->kobj);
353
354 memset(&dssdev->kobj, 0, sizeof(dssdev->kobj));
355 }
356 }
357
