1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (C) 2009 Nokia Corporation
4  * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
5  *
6  * Some code and ideas taken from drivers/video/omap/ driver
7  * by Imre Deak.
8  */
9 
10 #define DSS_SUBSYS_NAME "MANAGER"
11 
12 #include <linux/kernel.h>
13 #include <linux/slab.h>
14 #include <linux/module.h>
15 #include <linux/platform_device.h>
16 #include <linux/jiffies.h>
17 
18 #include <video/omapfb_dss.h>
19 
20 #include "dss.h"
21 #include "dss_features.h"
22 
23 static ssize_t manager_name_show(struct omap_overlay_manager *mgr, char *buf)
24 {
25 	return sysfs_emit(buf, "%s\n", mgr->name);
26 }
27 
28 static ssize_t manager_display_show(struct omap_overlay_manager *mgr, char *buf)
29 {
30 	struct omap_dss_device *dssdev = mgr->get_device(mgr);
31 
32 	return sysfs_emit(buf, "%s\n", dssdev ?
33 			dssdev->name : "<none>");
34 }
35 
36 static int manager_display_match(struct omap_dss_device *dssdev, void *data)
37 {
38 	const char *str = data;
39 
40 	return sysfs_streq(dssdev->name, str);
41 }
42 
43 static ssize_t manager_display_store(struct omap_overlay_manager *mgr,
44 		const char *buf, size_t size)
45 {
46 	int r = 0;
47 	size_t len = size;
48 	struct omap_dss_device *dssdev = NULL;
49 	struct omap_dss_device *old_dssdev;
50 
51 	if (buf[size-1] == '\n')
52 		--len;
53 
54 	if (len > 0)
55 		dssdev = omap_dss_find_device((void *)buf,
56 			manager_display_match);
57 
58 	if (len > 0 && dssdev == NULL)
59 		return -EINVAL;
60 
61 	if (dssdev) {
62 		DSSDBG("display %s found\n", dssdev->name);
63 
64 		if (omapdss_device_is_connected(dssdev)) {
65 			DSSERR("new display is already connected\n");
66 			r = -EINVAL;
67 			goto put_device;
68 		}
69 
70 		if (omapdss_device_is_enabled(dssdev)) {
71 			DSSERR("new display is not disabled\n");
72 			r = -EINVAL;
73 			goto put_device;
74 		}
75 	}
76 
77 	old_dssdev = mgr->get_device(mgr);
78 	if (old_dssdev) {
79 		if (omapdss_device_is_enabled(old_dssdev)) {
80 			DSSERR("old display is not disabled\n");
81 			r = -EINVAL;
82 			goto put_device;
83 		}
84 
85 		old_dssdev->driver->disconnect(old_dssdev);
86 	}
87 
88 	if (dssdev) {
89 		r = dssdev->driver->connect(dssdev);
90 		if (r) {
91 			DSSERR("failed to connect new device\n");
92 			goto put_device;
93 		}
94 
95 		old_dssdev = mgr->get_device(mgr);
96 		if (old_dssdev != dssdev) {
97 			DSSERR("failed to connect device to this manager\n");
98 			dssdev->driver->disconnect(dssdev);
99 			goto put_device;
100 		}
101 
102 		r = mgr->apply(mgr);
103 		if (r) {
104 			DSSERR("failed to apply dispc config\n");
105 			goto put_device;
106 		}
107 	}
108 
109 put_device:
110 	if (dssdev)
111 		omap_dss_put_device(dssdev);
112 
113 	return r ? r : size;
114 }
115 
116 static ssize_t manager_default_color_show(struct omap_overlay_manager *mgr,
117 					  char *buf)
118 {
119 	struct omap_overlay_manager_info info;
120 
121 	mgr->get_manager_info(mgr, &info);
122 
123 	return sysfs_emit(buf, "%#x\n", info.default_color);
124 }
125 
126 static ssize_t manager_default_color_store(struct omap_overlay_manager *mgr,
127 					   const char *buf, size_t size)
128 {
129 	struct omap_overlay_manager_info info;
130 	u32 color;
131 	int r;
132 
133 	r = kstrtouint(buf, 0, &color);
134 	if (r)
135 		return r;
136 
137 	mgr->get_manager_info(mgr, &info);
138 
139 	info.default_color = color;
140 
141 	r = mgr->set_manager_info(mgr, &info);
142 	if (r)
143 		return r;
144 
145 	r = mgr->apply(mgr);
146 	if (r)
147 		return r;
148 
149 	return size;
150 }
151 
152 static const char *trans_key_type_str[] = {
153 	"gfx-destination",
154 	"video-source",
155 };
156 
157 static ssize_t manager_trans_key_type_show(struct omap_overlay_manager *mgr,
158 					   char *buf)
159 {
160 	enum omap_dss_trans_key_type key_type;
161 	struct omap_overlay_manager_info info;
162 
163 	mgr->get_manager_info(mgr, &info);
164 
165 	key_type = info.trans_key_type;
166 	BUG_ON(key_type >= ARRAY_SIZE(trans_key_type_str));
167 
168 	return sysfs_emit(buf, "%s\n", trans_key_type_str[key_type]);
169 }
170 
171 static ssize_t manager_trans_key_type_store(struct omap_overlay_manager *mgr,
172 					    const char *buf, size_t size)
173 {
174 	struct omap_overlay_manager_info info;
175 	int r;
176 
177 	r = sysfs_match_string(trans_key_type_str, buf);
178 	if (r < 0)
179 		return r;
180 
181 	mgr->get_manager_info(mgr, &info);
182 
183 	info.trans_key_type = r;
184 
185 	r = mgr->set_manager_info(mgr, &info);
186 	if (r)
187 		return r;
188 
189 	r = mgr->apply(mgr);
190 	if (r)
191 		return r;
192 
193 	return size;
194 }
195 
196 static ssize_t manager_trans_key_value_show(struct omap_overlay_manager *mgr,
197 					    char *buf)
198 {
199 	struct omap_overlay_manager_info info;
200 
201 	mgr->get_manager_info(mgr, &info);
202 
203 	return sysfs_emit(buf, "%#x\n", info.trans_key);
204 }
205 
206 static ssize_t manager_trans_key_value_store(struct omap_overlay_manager *mgr,
207 					     const char *buf, size_t size)
208 {
209 	struct omap_overlay_manager_info info;
210 	u32 key_value;
211 	int r;
212 
213 	r = kstrtouint(buf, 0, &key_value);
214 	if (r)
215 		return r;
216 
217 	mgr->get_manager_info(mgr, &info);
218 
219 	info.trans_key = key_value;
220 
221 	r = mgr->set_manager_info(mgr, &info);
222 	if (r)
223 		return r;
224 
225 	r = mgr->apply(mgr);
226 	if (r)
227 		return r;
228 
229 	return size;
230 }
231 
232 static ssize_t manager_trans_key_enabled_show(struct omap_overlay_manager *mgr,
233 					      char *buf)
234 {
235 	struct omap_overlay_manager_info info;
236 
237 	mgr->get_manager_info(mgr, &info);
238 
239 	return sysfs_emit(buf, "%d\n", info.trans_enabled);
240 }
241 
242 static ssize_t manager_trans_key_enabled_store(struct omap_overlay_manager *mgr,
243 					       const char *buf, size_t size)
244 {
245 	struct omap_overlay_manager_info info;
246 	bool enable;
247 	int r;
248 
249 	r = strtobool(buf, &enable);
250 	if (r)
251 		return r;
252 
253 	mgr->get_manager_info(mgr, &info);
254 
255 	info.trans_enabled = enable;
256 
257 	r = mgr->set_manager_info(mgr, &info);
258 	if (r)
259 		return r;
260 
261 	r = mgr->apply(mgr);
262 	if (r)
263 		return r;
264 
265 	return size;
266 }
267 
268 static ssize_t manager_alpha_blending_enabled_show(
269 		struct omap_overlay_manager *mgr, char *buf)
270 {
271 	struct omap_overlay_manager_info info;
272 
273 	if(!dss_has_feature(FEAT_ALPHA_FIXED_ZORDER))
274 		return -ENODEV;
275 
276 	mgr->get_manager_info(mgr, &info);
277 
278 	return sysfs_emit(buf, "%d\n",
279 		info.partial_alpha_enabled);
280 }
281 
282 static ssize_t manager_alpha_blending_enabled_store(
283 		struct omap_overlay_manager *mgr,
284 		const char *buf, size_t size)
285 {
286 	struct omap_overlay_manager_info info;
287 	bool enable;
288 	int r;
289 
290 	if(!dss_has_feature(FEAT_ALPHA_FIXED_ZORDER))
291 		return -ENODEV;
292 
293 	r = strtobool(buf, &enable);
294 	if (r)
295 		return r;
296 
297 	mgr->get_manager_info(mgr, &info);
298 
299 	info.partial_alpha_enabled = enable;
300 
301 	r = mgr->set_manager_info(mgr, &info);
302 	if (r)
303 		return r;
304 
305 	r = mgr->apply(mgr);
306 	if (r)
307 		return r;
308 
309 	return size;
310 }
311 
312 static ssize_t manager_cpr_enable_show(struct omap_overlay_manager *mgr,
313 		char *buf)
314 {
315 	struct omap_overlay_manager_info info;
316 
317 	mgr->get_manager_info(mgr, &info);
318 
319 	return sysfs_emit(buf, "%d\n", info.cpr_enable);
320 }
321 
322 static ssize_t manager_cpr_enable_store(struct omap_overlay_manager *mgr,
323 		const char *buf, size_t size)
324 {
325 	struct omap_overlay_manager_info info;
326 	int r;
327 	bool enable;
328 
329 	if (!dss_has_feature(FEAT_CPR))
330 		return -ENODEV;
331 
332 	r = strtobool(buf, &enable);
333 	if (r)
334 		return r;
335 
336 	mgr->get_manager_info(mgr, &info);
337 
338 	if (info.cpr_enable == enable)
339 		return size;
340 
341 	info.cpr_enable = enable;
342 
343 	r = mgr->set_manager_info(mgr, &info);
344 	if (r)
345 		return r;
346 
347 	r = mgr->apply(mgr);
348 	if (r)
349 		return r;
350 
351 	return size;
352 }
353 
354 static ssize_t manager_cpr_coef_show(struct omap_overlay_manager *mgr,
355 		char *buf)
356 {
357 	struct omap_overlay_manager_info info;
358 
359 	mgr->get_manager_info(mgr, &info);
360 
361 	return sysfs_emit(buf,
362 			"%d %d %d %d %d %d %d %d %d\n",
363 			info.cpr_coefs.rr,
364 			info.cpr_coefs.rg,
365 			info.cpr_coefs.rb,
366 			info.cpr_coefs.gr,
367 			info.cpr_coefs.gg,
368 			info.cpr_coefs.gb,
369 			info.cpr_coefs.br,
370 			info.cpr_coefs.bg,
371 			info.cpr_coefs.bb);
372 }
373 
374 static ssize_t manager_cpr_coef_store(struct omap_overlay_manager *mgr,
375 		const char *buf, size_t size)
376 {
377 	struct omap_overlay_manager_info info;
378 	struct omap_dss_cpr_coefs coefs;
379 	int r, i;
380 	s16 *arr;
381 
382 	if (!dss_has_feature(FEAT_CPR))
383 		return -ENODEV;
384 
385 	if (sscanf(buf, "%hd %hd %hd %hd %hd %hd %hd %hd %hd",
386 				&coefs.rr, &coefs.rg, &coefs.rb,
387 				&coefs.gr, &coefs.gg, &coefs.gb,
388 				&coefs.br, &coefs.bg, &coefs.bb) != 9)
389 		return -EINVAL;
390 
391 	arr = (s16[]){ coefs.rr, coefs.rg, coefs.rb,
392 		coefs.gr, coefs.gg, coefs.gb,
393 		coefs.br, coefs.bg, coefs.bb };
394 
395 	for (i = 0; i < 9; ++i) {
396 		if (arr[i] < -512 || arr[i] > 511)
397 			return -EINVAL;
398 	}
399 
400 	mgr->get_manager_info(mgr, &info);
401 
402 	info.cpr_coefs = coefs;
403 
404 	r = mgr->set_manager_info(mgr, &info);
405 	if (r)
406 		return r;
407 
408 	r = mgr->apply(mgr);
409 	if (r)
410 		return r;
411 
412 	return size;
413 }
414 
415 struct manager_attribute {
416 	struct attribute attr;
417 	ssize_t (*show)(struct omap_overlay_manager *, char *);
418 	ssize_t	(*store)(struct omap_overlay_manager *, const char *, size_t);
419 };
420 
421 #define MANAGER_ATTR(_name, _mode, _show, _store) \
422 	struct manager_attribute manager_attr_##_name = \
423 	__ATTR(_name, _mode, _show, _store)
424 
425 static MANAGER_ATTR(name, S_IRUGO, manager_name_show, NULL);
426 static MANAGER_ATTR(display, S_IRUGO|S_IWUSR,
427 		manager_display_show, manager_display_store);
428 static MANAGER_ATTR(default_color, S_IRUGO|S_IWUSR,
429 		manager_default_color_show, manager_default_color_store);
430 static MANAGER_ATTR(trans_key_type, S_IRUGO|S_IWUSR,
431 		manager_trans_key_type_show, manager_trans_key_type_store);
432 static MANAGER_ATTR(trans_key_value, S_IRUGO|S_IWUSR,
433 		manager_trans_key_value_show, manager_trans_key_value_store);
434 static MANAGER_ATTR(trans_key_enabled, S_IRUGO|S_IWUSR,
435 		manager_trans_key_enabled_show,
436 		manager_trans_key_enabled_store);
437 static MANAGER_ATTR(alpha_blending_enabled, S_IRUGO|S_IWUSR,
438 		manager_alpha_blending_enabled_show,
439 		manager_alpha_blending_enabled_store);
440 static MANAGER_ATTR(cpr_enable, S_IRUGO|S_IWUSR,
441 		manager_cpr_enable_show,
442 		manager_cpr_enable_store);
443 static MANAGER_ATTR(cpr_coef, S_IRUGO|S_IWUSR,
444 		manager_cpr_coef_show,
445 		manager_cpr_coef_store);
446 
447 
448 static struct attribute *manager_sysfs_attrs[] = {
449 	&manager_attr_name.attr,
450 	&manager_attr_display.attr,
451 	&manager_attr_default_color.attr,
452 	&manager_attr_trans_key_type.attr,
453 	&manager_attr_trans_key_value.attr,
454 	&manager_attr_trans_key_enabled.attr,
455 	&manager_attr_alpha_blending_enabled.attr,
456 	&manager_attr_cpr_enable.attr,
457 	&manager_attr_cpr_coef.attr,
458 	NULL
459 };
460 
461 static ssize_t manager_attr_show(struct kobject *kobj, struct attribute *attr,
462 		char *buf)
463 {
464 	struct omap_overlay_manager *manager;
465 	struct manager_attribute *manager_attr;
466 
467 	manager = container_of(kobj, struct omap_overlay_manager, kobj);
468 	manager_attr = container_of(attr, struct manager_attribute, attr);
469 
470 	if (!manager_attr->show)
471 		return -ENOENT;
472 
473 	return manager_attr->show(manager, buf);
474 }
475 
476 static ssize_t manager_attr_store(struct kobject *kobj, struct attribute *attr,
477 		const char *buf, size_t size)
478 {
479 	struct omap_overlay_manager *manager;
480 	struct manager_attribute *manager_attr;
481 
482 	manager = container_of(kobj, struct omap_overlay_manager, kobj);
483 	manager_attr = container_of(attr, struct manager_attribute, attr);
484 
485 	if (!manager_attr->store)
486 		return -ENOENT;
487 
488 	return manager_attr->store(manager, buf, size);
489 }
490 
491 static const struct sysfs_ops manager_sysfs_ops = {
492 	.show = manager_attr_show,
493 	.store = manager_attr_store,
494 };
495 
496 static struct kobj_type manager_ktype = {
497 	.sysfs_ops = &manager_sysfs_ops,
498 	.default_attrs = manager_sysfs_attrs,
499 };
500 
501 int dss_manager_kobj_init(struct omap_overlay_manager *mgr,
502 		struct platform_device *pdev)
503 {
504 	return kobject_init_and_add(&mgr->kobj, &manager_ktype,
505 			&pdev->dev.kobj, "manager%d", mgr->id);
506 }
507 
508 void dss_manager_kobj_uninit(struct omap_overlay_manager *mgr)
509 {
510 	kobject_del(&mgr->kobj);
511 	kobject_put(&mgr->kobj);
512 
513 	memset(&mgr->kobj, 0, sizeof(mgr->kobj));
514 }
515