[deliverable/linux.git] / drivers / gpu / drm / omapdrm / dss / overlay-sysfs.c

/*
 * Copyright (C) 2009 Nokia Corporation
 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
 *
 * Some code and ideas taken from drivers/video/omap/ driver
 * by Imre Deak.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#define DSS_SUBSYS_NAME "OVERLAY"

#include <linux/module.h>
#include <linux/err.h>
#include <linux/sysfs.h>
#include <linux/kobject.h>
#include <linux/platform_device.h>

#include <video/omapdss.h>

#include "dss.h"
#include "dss_features.h"

static ssize_t overlay_name_show(struct omap_overlay *ovl, char *buf)
{
	return snprintf(buf, PAGE_SIZE, "%s\n", ovl->name);
}

static ssize_t overlay_manager_show(struct omap_overlay *ovl, char *buf)
{
	return snprintf(buf, PAGE_SIZE, "%s\n",
			ovl->manager ? ovl->manager->name : "<none>");
}

static ssize_t overlay_manager_store(struct omap_overlay *ovl, const char *buf,
		size_t size)
{
	int i, r;
	struct omap_overlay_manager *mgr = NULL;
	struct omap_overlay_manager *old_mgr;
	int len = size;

	if (buf[size-1] == '\n')
		--len;

	if (len > 0) {
		for (i = 0; i < omap_dss_get_num_overlay_managers(); ++i) {
			mgr = omap_dss_get_overlay_manager(i);

			if (sysfs_streq(buf, mgr->name))
				break;

			mgr = NULL;
		}
	}

	if (len > 0 && mgr == NULL)
		return -EINVAL;

	if (mgr)
		DSSDBG("manager %s found\n", mgr->name);

	if (mgr == ovl->manager)
		return size;

	old_mgr = ovl->manager;

	r = dispc_runtime_get();
	if (r)
		return r;

	/* detach old manager */
	if (old_mgr) {
		r = ovl->unset_manager(ovl);
		if (r) {
			DSSERR("detach failed\n");
			goto err;
		}

		r = old_mgr->apply(old_mgr);
		if (r)
			goto err;
	}

	if (mgr) {
		r = ovl->set_manager(ovl, mgr);
		if (r) {
			DSSERR("Failed to attach overlay\n");
			goto err;
		}

		r = mgr->apply(mgr);
		if (r)
			goto err;
	}

	dispc_runtime_put();

	return size;

err:
	dispc_runtime_put();
	return r;
}

static ssize_t overlay_input_size_show(struct omap_overlay *ovl, char *buf)
{
	struct omap_overlay_info info;

	ovl->get_overlay_info(ovl, &info);

	return snprintf(buf, PAGE_SIZE, "%d,%d\n",
			info.width, info.height);
}

static ssize_t overlay_screen_width_show(struct omap_overlay *ovl, char *buf)
{
	struct omap_overlay_info info;

	ovl->get_overlay_info(ovl, &info);

	return snprintf(buf, PAGE_SIZE, "%d\n", info.screen_width);
}

static ssize_t overlay_position_show(struct omap_overlay *ovl, char *buf)
{
	struct omap_overlay_info info;

	ovl->get_overlay_info(ovl, &info);

	return snprintf(buf, PAGE_SIZE, "%d,%d\n",
			info.pos_x, info.pos_y);
}

static ssize_t overlay_position_store(struct omap_overlay *ovl,
		const char *buf, size_t size)
{
	int r;
	char *last;
	struct omap_overlay_info info;

	ovl->get_overlay_info(ovl, &info);

	info.pos_x = simple_strtoul(buf, &last, 10);
	++last;
	if (last - buf >= size)
		return -EINVAL;

	info.pos_y = simple_strtoul(last, &last, 10);

	r = ovl->set_overlay_info(ovl, &info);
	if (r)
		return r;

	if (ovl->manager) {
		r = ovl->manager->apply(ovl->manager);
		if (r)
			return r;
	}

	return size;
}

static ssize_t overlay_output_size_show(struct omap_overlay *ovl, char *buf)
{
	struct omap_overlay_info info;

	ovl->get_overlay_info(ovl, &info);

	return snprintf(buf, PAGE_SIZE, "%d,%d\n",
			info.out_width, info.out_height);
}

static ssize_t overlay_output_size_store(struct omap_overlay *ovl,
		const char *buf, size_t size)
{
	int r;
	char *last;
	struct omap_overlay_info info;

	ovl->get_overlay_info(ovl, &info);

	info.out_width = simple_strtoul(buf, &last, 10);
	++last;
	if (last - buf >= size)
		return -EINVAL;

	info.out_height = simple_strtoul(last, &last, 10);

	r = ovl->set_overlay_info(ovl, &info);
	if (r)
		return r;

	if (ovl->manager) {
		r = ovl->manager->apply(ovl->manager);
		if (r)
			return r;
	}

	return size;
}

static ssize_t overlay_enabled_show(struct omap_overlay *ovl, char *buf)
{
	return snprintf(buf, PAGE_SIZE, "%d\n", ovl->is_enabled(ovl));
}

static ssize_t overlay_enabled_store(struct omap_overlay *ovl, const char *buf,
		size_t size)
{
	int r;
	bool enable;

	r = strtobool(buf, &enable);
	if (r)
		return r;

	if (enable)
		r = ovl->enable(ovl);
	else
		r = ovl->disable(ovl);

	if (r)
		return r;

	return size;
}

static ssize_t overlay_global_alpha_show(struct omap_overlay *ovl, char *buf)
{
	struct omap_overlay_info info;

	ovl->get_overlay_info(ovl, &info);

	return snprintf(buf, PAGE_SIZE, "%d\n",
			info.global_alpha);
}

static ssize_t overlay_global_alpha_store(struct omap_overlay *ovl,
		const char *buf, size_t size)
{
	int r;
	u8 alpha;
	struct omap_overlay_info info;

	if ((ovl->caps & OMAP_DSS_OVL_CAP_GLOBAL_ALPHA) == 0)
		return -ENODEV;

	r = kstrtou8(buf, 0, &alpha);
	if (r)
		return r;

	ovl->get_overlay_info(ovl, &info);

	info.global_alpha = alpha;

	r = ovl->set_overlay_info(ovl, &info);
	if (r)
		return r;

	if (ovl->manager) {
		r = ovl->manager->apply(ovl->manager);
		if (r)
			return r;
	}

	return size;
}

static ssize_t overlay_pre_mult_alpha_show(struct omap_overlay *ovl,
		char *buf)
{
	struct omap_overlay_info info;

	ovl->get_overlay_info(ovl, &info);

	return snprintf(buf, PAGE_SIZE, "%d\n",
			info.pre_mult_alpha);
}

static ssize_t overlay_pre_mult_alpha_store(struct omap_overlay *ovl,
		const char *buf, size_t size)
{
	int r;
	u8 alpha;
	struct omap_overlay_info info;

	if ((ovl->caps & OMAP_DSS_OVL_CAP_PRE_MULT_ALPHA) == 0)
		return -ENODEV;

	r = kstrtou8(buf, 0, &alpha);
	if (r)
		return r;

	ovl->get_overlay_info(ovl, &info);

	info.pre_mult_alpha = alpha;

	r = ovl->set_overlay_info(ovl, &info);
	if (r)
		return r;

	if (ovl->manager) {
		r = ovl->manager->apply(ovl->manager);
		if (r)
			return r;
	}

	return size;
}

static ssize_t overlay_zorder_show(struct omap_overlay *ovl, char *buf)
{
	struct omap_overlay_info info;

	ovl->get_overlay_info(ovl, &info);

	return snprintf(buf, PAGE_SIZE, "%d\n", info.zorder);
}

static ssize_t overlay_zorder_store(struct omap_overlay *ovl,
		const char *buf, size_t size)
{
	int r;
	u8 zorder;
	struct omap_overlay_info info;

	if ((ovl->caps & OMAP_DSS_OVL_CAP_ZORDER) == 0)
		return -ENODEV;

	r = kstrtou8(buf, 0, &zorder);
	if (r)
		return r;

	ovl->get_overlay_info(ovl, &info);

	info.zorder = zorder;

	r = ovl->set_overlay_info(ovl, &info);
	if (r)
		return r;

	if (ovl->manager) {
		r = ovl->manager->apply(ovl->manager);
		if (r)
			return r;
	}

	return size;
}

struct overlay_attribute {
	struct attribute attr;
	ssize_t (*show)(struct omap_overlay *, char *);
	ssize_t	(*store)(struct omap_overlay *, const char *, size_t);
};

#define OVERLAY_ATTR(_name, _mode, _show, _store) \
	struct overlay_attribute overlay_attr_##_name = \
	__ATTR(_name, _mode, _show, _store)

static OVERLAY_ATTR(name, S_IRUGO, overlay_name_show, NULL);
static OVERLAY_ATTR(manager, S_IRUGO|S_IWUSR,
		overlay_manager_show, overlay_manager_store);
static OVERLAY_ATTR(input_size, S_IRUGO, overlay_input_size_show, NULL);
static OVERLAY_ATTR(screen_width, S_IRUGO, overlay_screen_width_show, NULL);
static OVERLAY_ATTR(position, S_IRUGO|S_IWUSR,
		overlay_position_show, overlay_position_store);
static OVERLAY_ATTR(output_size, S_IRUGO|S_IWUSR,
		overlay_output_size_show, overlay_output_size_store);
static OVERLAY_ATTR(enabled, S_IRUGO|S_IWUSR,
		overlay_enabled_show, overlay_enabled_store);
static OVERLAY_ATTR(global_alpha, S_IRUGO|S_IWUSR,
		overlay_global_alpha_show, overlay_global_alpha_store);
static OVERLAY_ATTR(pre_mult_alpha, S_IRUGO|S_IWUSR,
		overlay_pre_mult_alpha_show,
		overlay_pre_mult_alpha_store);
static OVERLAY_ATTR(zorder, S_IRUGO|S_IWUSR,
		overlay_zorder_show, overlay_zorder_store);

static struct attribute *overlay_sysfs_attrs[] = {
	&overlay_attr_name.attr,
	&overlay_attr_manager.attr,
	&overlay_attr_input_size.attr,
	&overlay_attr_screen_width.attr,
	&overlay_attr_position.attr,
	&overlay_attr_output_size.attr,
	&overlay_attr_enabled.attr,
	&overlay_attr_global_alpha.attr,
	&overlay_attr_pre_mult_alpha.attr,
	&overlay_attr_zorder.attr,
	NULL
};

static ssize_t overlay_attr_show(struct kobject *kobj, struct attribute *attr,
		char *buf)
{
	struct omap_overlay *overlay;
	struct overlay_attribute *overlay_attr;

	overlay = container_of(kobj, struct omap_overlay, kobj);
	overlay_attr = container_of(attr, struct overlay_attribute, attr);

	if (!overlay_attr->show)
		return -ENOENT;

	return overlay_attr->show(overlay, buf);
}

static ssize_t overlay_attr_store(struct kobject *kobj, struct attribute *attr,
		const char *buf, size_t size)
{
	struct omap_overlay *overlay;
	struct overlay_attribute *overlay_attr;

	overlay = container_of(kobj, struct omap_overlay, kobj);
	overlay_attr = container_of(attr, struct overlay_attribute, attr);

	if (!overlay_attr->store)
		return -ENOENT;

	return overlay_attr->store(overlay, buf, size);
}

static const struct sysfs_ops overlay_sysfs_ops = {
	.show = overlay_attr_show,
	.store = overlay_attr_store,
};

static struct kobj_type overlay_ktype = {
	.sysfs_ops = &overlay_sysfs_ops,
	.default_attrs = overlay_sysfs_attrs,
};

int dss_overlay_kobj_init(struct omap_overlay *ovl,
		struct platform_device *pdev)
{
	return kobject_init_and_add(&ovl->kobj, &overlay_ktype,
			&pdev->dev.kobj, "overlay%d", ovl->id);
}

void dss_overlay_kobj_uninit(struct omap_overlay *ovl)
{
	kobject_del(&ovl->kobj);
	kobject_put(&ovl->kobj);
}
Commit	Line	Data
91691516 TV	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 "OVERLAY"
	22
	23	#include <linux/module.h>
	24	#include <linux/err.h>
	25	#include <linux/sysfs.h>
	26	#include <linux/kobject.h>
	27	#include <linux/platform_device.h>
	28
	29	#include <video/omapdss.h>
	30
	31	#include "dss.h"
	32	#include "dss_features.h"
	33
	34	static ssize_t overlay_name_show(struct omap_overlay ovl, char buf)
	35	{
	36	return snprintf(buf, PAGE_SIZE, "%s\n", ovl->name);
	37	}
	38
	39	static ssize_t overlay_manager_show(struct omap_overlay ovl, char buf)
	40	{
	41	return snprintf(buf, PAGE_SIZE, "%s\n",
	42	ovl->manager ? ovl->manager->name : "<none>");
	43	}
	44
	45	static ssize_t overlay_manager_store(struct omap_overlay ovl, const char buf,
	46	size_t size)
	47	{
	48	int i, r;
	49	struct omap_overlay_manager *mgr = NULL;
	50	struct omap_overlay_manager *old_mgr;
	51	int len = size;
	52
	53	if (buf[size-1] == '\n')
	54	--len;
	55
	56	if (len > 0) {
	57	for (i = 0; i < omap_dss_get_num_overlay_managers(); ++i) {
	58	mgr = omap_dss_get_overlay_manager(i);
	59
	60	if (sysfs_streq(buf, mgr->name))
	61	break;
	62
	63	mgr = NULL;
	64	}
65	}
66
67	if (len > 0 && mgr == NULL)
68	return -EINVAL;
69
70	if (mgr)
71	DSSDBG("manager %s found\n", mgr->name);
72
73	if (mgr == ovl->manager)
74	return size;
75
76	old_mgr = ovl->manager;
77
78	r = dispc_runtime_get();
79	if (r)
80	return r;
81
82	/* detach old manager */
83	if (old_mgr) {
84	r = ovl->unset_manager(ovl);
85	if (r) {
86	DSSERR("detach failed\n");
87	goto err;
88	}
89
90	r = old_mgr->apply(old_mgr);
91	if (r)
92	goto err;
93	}
94
95	if (mgr) {
96	r = ovl->set_manager(ovl, mgr);
97	if (r) {
98	DSSERR("Failed to attach overlay\n");
99	goto err;
100	}
101
102	r = mgr->apply(mgr);
103	if (r)
104	goto err;
105	}
106
107	dispc_runtime_put();
108
109	return size;
110
111	err:
112	dispc_runtime_put();
113	return r;
114	}
115
116	static ssize_t overlay_input_size_show(struct omap_overlay ovl, char buf)
117	{
118	struct omap_overlay_info info;
119
120	ovl->get_overlay_info(ovl, &info);
121
122	return snprintf(buf, PAGE_SIZE, "%d,%d\n",
123	info.width, info.height);
124	}
125
126	static ssize_t overlay_screen_width_show(struct omap_overlay ovl, char buf)
127	{
128	struct omap_overlay_info info;
129
130	ovl->get_overlay_info(ovl, &info);
131
132	return snprintf(buf, PAGE_SIZE, "%d\n", info.screen_width);
133	}
134
135	static ssize_t overlay_position_show(struct omap_overlay ovl, char buf)
136	{
137	struct omap_overlay_info info;
138
139	ovl->get_overlay_info(ovl, &info);
140
141	return snprintf(buf, PAGE_SIZE, "%d,%d\n",
142	info.pos_x, info.pos_y);
143	}
144
145	static ssize_t overlay_position_store(struct omap_overlay *ovl,
146	const char *buf, size_t size)
147	{
148	int r;
149	char *last;
150	struct omap_overlay_info info;
151
152	ovl->get_overlay_info(ovl, &info);
153
154	info.pos_x = simple_strtoul(buf, &last, 10);
155	++last;
156	if (last - buf >= size)
157	return -EINVAL;
158
159	info.pos_y = simple_strtoul(last, &last, 10);
160
161	r = ovl->set_overlay_info(ovl, &info);
162	if (r)
163	return r;
164
165	if (ovl->manager) {
166	r = ovl->manager->apply(ovl->manager);
167	if (r)
168	return r;
169	}
170
171	return size;
172	}
173
174	static ssize_t overlay_output_size_show(struct omap_overlay ovl, char buf)
175	{
176	struct omap_overlay_info info;
177
178	ovl->get_overlay_info(ovl, &info);
179
180	return snprintf(buf, PAGE_SIZE, "%d,%d\n",
181	info.out_width, info.out_height);
182	}
183
184	static ssize_t overlay_output_size_store(struct omap_overlay *ovl,
185	const char *buf, size_t size)
186	{
187	int r;
188	char *last;
189	struct omap_overlay_info info;
190
191	ovl->get_overlay_info(ovl, &info);
192
193	info.out_width = simple_strtoul(buf, &last, 10);
194	++last;
195	if (last - buf >= size)
196	return -EINVAL;
197
198	info.out_height = simple_strtoul(last, &last, 10);
199
200	r = ovl->set_overlay_info(ovl, &info);
201	if (r)
202	return r;
203
204	if (ovl->manager) {
205	r = ovl->manager->apply(ovl->manager);
206	if (r)
207	return r;
208	}
209
210	return size;
211	}
212
213	static ssize_t overlay_enabled_show(struct omap_overlay ovl, char buf)
214	{
215	return snprintf(buf, PAGE_SIZE, "%d\n", ovl->is_enabled(ovl));
216	}
217
218	static ssize_t overlay_enabled_store(struct omap_overlay ovl, const char buf,
219	size_t size)
220	{
221	int r;
222	bool enable;
223
224	r = strtobool(buf, &enable);
225	if (r)
226	return r;
227
228	if (enable)
229	r = ovl->enable(ovl);
230	else
231	r = ovl->disable(ovl);
232
233	if (r)
234	return r;
235
236	return size;
237	}
238
239	static ssize_t overlay_global_alpha_show(struct omap_overlay ovl, char buf)
240	{
241	struct omap_overlay_info info;
242
243	ovl->get_overlay_info(ovl, &info);
244
245	return snprintf(buf, PAGE_SIZE, "%d\n",
246	info.global_alpha);
247	}
248
249	static ssize_t overlay_global_alpha_store(struct omap_overlay *ovl,
250	const char *buf, size_t size)
251	{
252	int r;
253	u8 alpha;
254	struct omap_overlay_info info;
255
256	if ((ovl->caps & OMAP_DSS_OVL_CAP_GLOBAL_ALPHA) == 0)
257	return -ENODEV;
258
259	r = kstrtou8(buf, 0, &alpha);
260	if (r)
261	return r;
262
263	ovl->get_overlay_info(ovl, &info);
264
265	info.global_alpha = alpha;
266
267	r = ovl->set_overlay_info(ovl, &info);
268	if (r)
269	return r;
270
271	if (ovl->manager) {
272	r = ovl->manager->apply(ovl->manager);
273	if (r)
274	return r;
275	}
276
277	return size;
278	}
279
280	static ssize_t overlay_pre_mult_alpha_show(struct omap_overlay *ovl,
281	char *buf)
282	{
283	struct omap_overlay_info info;
284
285	ovl->get_overlay_info(ovl, &info);
286
287	return snprintf(buf, PAGE_SIZE, "%d\n",
288	info.pre_mult_alpha);
289	}
290
291	static ssize_t overlay_pre_mult_alpha_store(struct omap_overlay *ovl,
292	const char *buf, size_t size)
293	{
294	int r;
295	u8 alpha;
296	struct omap_overlay_info info;
297
298	if ((ovl->caps & OMAP_DSS_OVL_CAP_PRE_MULT_ALPHA) == 0)
299	return -ENODEV;
300
301	r = kstrtou8(buf, 0, &alpha);
302	if (r)
303	return r;
304
305	ovl->get_overlay_info(ovl, &info);
306
307	info.pre_mult_alpha = alpha;
308
309	r = ovl->set_overlay_info(ovl, &info);
310	if (r)
311	return r;
312
313	if (ovl->manager) {
314	r = ovl->manager->apply(ovl->manager);
315	if (r)
316	return r;
317	}
318
319	return size;
320	}
321
322	static ssize_t overlay_zorder_show(struct omap_overlay ovl, char buf)
323	{
324	struct omap_overlay_info info;
325
326	ovl->get_overlay_info(ovl, &info);
327
328	return snprintf(buf, PAGE_SIZE, "%d\n", info.zorder);
329	}
330
331	static ssize_t overlay_zorder_store(struct omap_overlay *ovl,
332	const char *buf, size_t size)
333	{
334	int r;
335	u8 zorder;
336	struct omap_overlay_info info;
337
338	if ((ovl->caps & OMAP_DSS_OVL_CAP_ZORDER) == 0)
339	return -ENODEV;
340
341	r = kstrtou8(buf, 0, &zorder);
342	if (r)
343	return r;
344
345	ovl->get_overlay_info(ovl, &info);
346
347	info.zorder = zorder;
348
349	r = ovl->set_overlay_info(ovl, &info);
350	if (r)
351	return r;
352
353	if (ovl->manager) {
354	r = ovl->manager->apply(ovl->manager);
355	if (r)
356	return r;
357	}
358
359	return size;
360	}
361
362	struct overlay_attribute {
363	struct attribute attr;
364	ssize_t (show)(struct omap_overlay , char *);
365	ssize_t (store)(struct omap_overlay , const char *, size_t);
366	};
367
368	#define OVERLAY_ATTR(_name, _mode, _show, _store) \
369	struct overlay_attribute overlay_attr_##_name = \
370	__ATTR(_name, _mode, _show, _store)
371
372	static OVERLAY_ATTR(name, S_IRUGO, overlay_name_show, NULL);
373	static OVERLAY_ATTR(manager, S_IRUGO\|S_IWUSR,
374	overlay_manager_show, overlay_manager_store);
375	static OVERLAY_ATTR(input_size, S_IRUGO, overlay_input_size_show, NULL);
376	static OVERLAY_ATTR(screen_width, S_IRUGO, overlay_screen_width_show, NULL);
377	static OVERLAY_ATTR(position, S_IRUGO\|S_IWUSR,
378	overlay_position_show, overlay_position_store);
379	static OVERLAY_ATTR(output_size, S_IRUGO\|S_IWUSR,
380	overlay_output_size_show, overlay_output_size_store);
381	static OVERLAY_ATTR(enabled, S_IRUGO\|S_IWUSR,
382	overlay_enabled_show, overlay_enabled_store);
383	static OVERLAY_ATTR(global_alpha, S_IRUGO\|S_IWUSR,
384	overlay_global_alpha_show, overlay_global_alpha_store);
385	static OVERLAY_ATTR(pre_mult_alpha, S_IRUGO\|S_IWUSR,
386	overlay_pre_mult_alpha_show,
387	overlay_pre_mult_alpha_store);
388	static OVERLAY_ATTR(zorder, S_IRUGO\|S_IWUSR,
389	overlay_zorder_show, overlay_zorder_store);
390
391	static struct attribute *overlay_sysfs_attrs[] = {
392	&overlay_attr_name.attr,
393	&overlay_attr_manager.attr,
394	&overlay_attr_input_size.attr,
395	&overlay_attr_screen_width.attr,
396	&overlay_attr_position.attr,
397	&overlay_attr_output_size.attr,
398	&overlay_attr_enabled.attr,
399	&overlay_attr_global_alpha.attr,
400	&overlay_attr_pre_mult_alpha.attr,
401	&overlay_attr_zorder.attr,
402	NULL
403	};
404
405	static ssize_t overlay_attr_show(struct kobject kobj, struct attribute attr,
406	char *buf)
407	{
408	struct omap_overlay *overlay;
409	struct overlay_attribute *overlay_attr;
410
411	overlay = container_of(kobj, struct omap_overlay, kobj);
412	overlay_attr = container_of(attr, struct overlay_attribute, attr);
413
414	if (!overlay_attr->show)
415	return -ENOENT;
416
417	return overlay_attr->show(overlay, buf);
418	}
419
420	static ssize_t overlay_attr_store(struct kobject kobj, struct attribute attr,
421	const char *buf, size_t size)
422	{
423	struct omap_overlay *overlay;
424	struct overlay_attribute *overlay_attr;
425
426	overlay = container_of(kobj, struct omap_overlay, kobj);
427	overlay_attr = container_of(attr, struct overlay_attribute, attr);
428
429	if (!overlay_attr->store)
430	return -ENOENT;
431
432	return overlay_attr->store(overlay, buf, size);
433	}
434
435	static const struct sysfs_ops overlay_sysfs_ops = {
436	.show = overlay_attr_show,
437	.store = overlay_attr_store,
438	};
439
440	static struct kobj_type overlay_ktype = {
441	.sysfs_ops = &overlay_sysfs_ops,
442	.default_attrs = overlay_sysfs_attrs,
443	};
444
445	int dss_overlay_kobj_init(struct omap_overlay *ovl,
446	struct platform_device *pdev)
447	{
448	return kobject_init_and_add(&ovl->kobj, &overlay_ktype,
449	&pdev->dev.kobj, "overlay%d", ovl->id);
450	}
451
452	void dss_overlay_kobj_uninit(struct omap_overlay *ovl)
453	{
454	kobject_del(&ovl->kobj);
455	kobject_put(&ovl->kobj);
456	}