summaryrefslogtreecommitdiff
path: root/drivers/video/fbdev/mmp/fb/mmpfb.c
blob: 7ab31eb76a8c3530e119589550afff1fde69e580 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
/*
 * linux/drivers/video/mmp/fb/mmpfb.c
 * Framebuffer driver for Marvell Display controller.
 *
 * Copyright (C) 2012 Marvell Technology Group Ltd.
 * Authors: Zhou Zhu <zzhu3@marvell.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 *
 * 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/>.
 *
 */
#include <linux/module.h>
#include <linux/dma-mapping.h>
#include <linux/platform_device.h>
#include "mmpfb.h"

static int var_to_pixfmt(struct fb_var_screeninfo *var)
{
	/*
	 * Pseudocolor mode?
	 */
	if (var->bits_per_pixel == 8)
		return PIXFMT_PSEUDOCOLOR;

	/*
	 * Check for YUV422PLANAR.
	 */
	if (var->bits_per_pixel == 16 && var->red.length == 8 &&
			var->green.length == 4 && var->blue.length == 4) {
		if (var->green.offset >= var->blue.offset)
			return PIXFMT_YUV422P;
		else
			return PIXFMT_YVU422P;
	}

	/*
	 * Check for YUV420PLANAR.
	 */
	if (var->bits_per_pixel == 12 && var->red.length == 8 &&
			var->green.length == 2 && var->blue.length == 2) {
		if (var->green.offset >= var->blue.offset)
			return PIXFMT_YUV420P;
		else
			return PIXFMT_YVU420P;
	}

	/*
	 * Check for YUV422PACK.
	 */
	if (var->bits_per_pixel == 16 && var->red.length == 16 &&
			var->green.length == 16 && var->blue.length == 16) {
		if (var->red.offset == 0)
			return PIXFMT_YUYV;
		else if (var->green.offset >= var->blue.offset)
			return PIXFMT_UYVY;
		else
			return PIXFMT_VYUY;
	}

	/*
	 * Check for 565/1555.
	 */
	if (var->bits_per_pixel == 16 && var->red.length <= 5 &&
			var->green.length <= 6 && var->blue.length <= 5) {
		if (var->transp.length == 0) {
			if (var->red.offset >= var->blue.offset)
				return PIXFMT_RGB565;
			else
				return PIXFMT_BGR565;
		}
	}

	/*
	 * Check for 888/A888.
	 */
	if (var->bits_per_pixel <= 32 && var->red.length <= 8 &&
			var->green.length <= 8 && var->blue.length <= 8) {
		if (var->bits_per_pixel == 24 && var->transp.length == 0) {
			if (var->red.offset >= var->blue.offset)
				return PIXFMT_RGB888PACK;
			else
				return PIXFMT_BGR888PACK;
		}

		if (var->bits_per_pixel == 32 && var->transp.offset == 24) {
			if (var->red.offset >= var->blue.offset)
				return PIXFMT_RGBA888;
			else
				return PIXFMT_BGRA888;
		} else {
			if (var->red.offset >= var->blue.offset)
				return PIXFMT_RGB888UNPACK;
			else
				return PIXFMT_BGR888UNPACK;
		}

		/* fall through */
	}

	return -EINVAL;
}

static void pixfmt_to_var(struct fb_var_screeninfo *var, int pix_fmt)
{
	switch (pix_fmt) {
	case PIXFMT_RGB565:
		var->bits_per_pixel = 16;
		var->red.offset = 11;	var->red.length = 5;
		var->green.offset = 5;   var->green.length = 6;
		var->blue.offset = 0;	var->blue.length = 5;
		var->transp.offset = 0;  var->transp.length = 0;
		break;
	case PIXFMT_BGR565:
		var->bits_per_pixel = 16;
		var->red.offset = 0;	var->red.length = 5;
		var->green.offset = 5;	 var->green.length = 6;
		var->blue.offset = 11;	var->blue.length = 5;
		var->transp.offset = 0;  var->transp.length = 0;
		break;
	case PIXFMT_RGB888UNPACK:
		var->bits_per_pixel = 32;
		var->red.offset = 16;	var->red.length = 8;
		var->green.offset = 8;   var->green.length = 8;
		var->blue.offset = 0;	var->blue.length = 8;
		var->transp.offset = 0;  var->transp.length = 0;
		break;
	case PIXFMT_BGR888UNPACK:
		var->bits_per_pixel = 32;
		var->red.offset = 0;	var->red.length = 8;
		var->green.offset = 8;	 var->green.length = 8;
		var->blue.offset = 16;	var->blue.length = 8;
		var->transp.offset = 0;  var->transp.length = 0;
		break;
	case PIXFMT_RGBA888:
		var->bits_per_pixel = 32;
		var->red.offset = 16;	var->red.length = 8;
		var->green.offset = 8;   var->green.length = 8;
		var->blue.offset = 0;	var->blue.length = 8;
		var->transp.offset = 24; var->transp.length = 8;
		break;
	case PIXFMT_BGRA888:
		var->bits_per_pixel = 32;
		var->red.offset = 0;	var->red.length = 8;
		var->green.offset = 8;	 var->green.length = 8;
		var->blue.offset = 16;	var->blue.length = 8;
		var->transp.offset = 24; var->transp.length = 8;
		break;
	case PIXFMT_RGB888PACK:
		var->bits_per_pixel = 24;
		var->red.offset = 16;	var->red.length = 8;
		var->green.offset = 8;   var->green.length = 8;
		var->blue.offset = 0;	var->blue.length = 8;
		var->transp.offset = 0;  var->transp.length = 0;
		break;
	case PIXFMT_BGR888PACK:
		var->bits_per_pixel = 24;
		var->red.offset = 0;	var->red.length = 8;
		var->green.offset = 8;	 var->green.length = 8;
		var->blue.offset = 16;	var->blue.length = 8;
		var->transp.offset = 0;  var->transp.length = 0;
		break;
	case PIXFMT_YUV420P:
		var->bits_per_pixel = 12;
		var->red.offset = 4;	 var->red.length = 8;
		var->green.offset = 2;   var->green.length = 2;
		var->blue.offset = 0;   var->blue.length = 2;
		var->transp.offset = 0;  var->transp.length = 0;
		break;
	case PIXFMT_YVU420P:
		var->bits_per_pixel = 12;
		var->red.offset = 4;	 var->red.length = 8;
		var->green.offset = 0;	 var->green.length = 2;
		var->blue.offset = 2;	var->blue.length = 2;
		var->transp.offset = 0;  var->transp.length = 0;
		break;
	case PIXFMT_YUV422P:
		var->bits_per_pixel = 16;
		var->red.offset = 8;	 var->red.length = 8;
		var->green.offset = 4;   var->green.length = 4;
		var->blue.offset = 0;   var->blue.length = 4;
		var->transp.offset = 0;  var->transp.length = 0;
		break;
	case PIXFMT_YVU422P:
		var->bits_per_pixel = 16;
		var->red.offset = 8;	 var->red.length = 8;
		var->green.offset = 0;	 var->green.length = 4;
		var->blue.offset = 4;	var->blue.length = 4;
		var->transp.offset = 0;  var->transp.length = 0;
		break;
	case PIXFMT_UYVY:
		var->bits_per_pixel = 16;
		var->red.offset = 8;	 var->red.length = 16;
		var->green.offset = 4;   var->green.length = 16;
		var->blue.offset = 0;   var->blue.length = 16;
		var->transp.offset = 0;  var->transp.length = 0;
		break;
	case PIXFMT_VYUY:
		var->bits_per_pixel = 16;
		var->red.offset = 8;	 var->red.length = 16;
		var->green.offset = 0;	 var->green.length = 16;
		var->blue.offset = 4;	var->blue.length = 16;
		var->transp.offset = 0;  var->transp.length = 0;
		break;
	case PIXFMT_YUYV:
		var->bits_per_pixel = 16;
		var->red.offset = 0;	 var->red.length = 16;
		var->green.offset = 4;	 var->green.length = 16;
		var->blue.offset = 8;	var->blue.length = 16;
		var->transp.offset = 0;  var->transp.length = 0;
		break;
	case PIXFMT_PSEUDOCOLOR:
		var->bits_per_pixel = 8;
		var->red.offset = 0;	 var->red.length = 8;
		var->green.offset = 0;   var->green.length = 8;
		var->blue.offset = 0;	var->blue.length = 8;
		var->transp.offset = 0;  var->transp.length = 0;
		break;
	}
}

/*
 * fb framework has its limitation:
 * 1. input color/output color is not seprated
 * 2. fb_videomode not include output color
 * so for fb usage, we keep a output format which is not changed
 *  then it's added for mmpmode
 */
static void fbmode_to_mmpmode(struct mmp_mode *mode,
		struct fb_videomode *videomode, int output_fmt)
{
	u64 div_result = 1000000000000ll;
	mode->name = videomode->name;
	mode->refresh = videomode->refresh;
	mode->xres = videomode->xres;
	mode->yres = videomode->yres;

	do_div(div_result, videomode->pixclock);
	mode->pixclock_freq = (u32)div_result;

	mode->left_margin = videomode->left_margin;
	mode->right_margin = videomode->right_margin;
	mode->upper_margin = videomode->upper_margin;
	mode->lower_margin = videomode->lower_margin;
	mode->hsync_len = videomode->hsync_len;
	mode->vsync_len = videomode->vsync_len;
	mode->hsync_invert = !!(videomode->sync & FB_SYNC_HOR_HIGH_ACT);
	mode->vsync_invert = !!(videomode->sync & FB_SYNC_VERT_HIGH_ACT);
	/* no defined flag in fb, use vmode>>3*/
	mode->invert_pixclock = !!(videomode->vmode & 8);
	mode->pix_fmt_out = output_fmt;
}

static void mmpmode_to_fbmode(struct fb_videomode *videomode,
		struct mmp_mode *mode)
{
	u64 div_result = 1000000000000ll;

	videomode->name = mode->name;
	videomode->refresh = mode->refresh;
	videomode->xres = mode->xres;
	videomode->yres = mode->yres;

	do_div(div_result, mode->pixclock_freq);
	videomode->pixclock = (u32)div_result;

	videomode->left_margin = mode->left_margin;
	videomode->right_margin = mode->right_margin;
	videomode->upper_margin = mode->upper_margin;
	videomode->lower_margin = mode->lower_margin;
	videomode->hsync_len = mode->hsync_len;
	videomode->vsync_len = mode->vsync_len;
	videomode->sync = (mode->hsync_invert ? FB_SYNC_HOR_HIGH_ACT : 0)
		| (mode->vsync_invert ? FB_SYNC_VERT_HIGH_ACT : 0);
	videomode->vmode = mode->invert_pixclock ? 8 : 0;
}

static int mmpfb_check_var(struct fb_var_screeninfo *var,
		struct fb_info *info)
{
	struct mmpfb_info *fbi = info->par;

	if (var->bits_per_pixel == 8)
		return -EINVAL;
	/*
	 * Basic geometry sanity checks.
	 */
	if (var->xoffset + var->xres > var->xres_virtual)
		return -EINVAL;
	if (var->yoffset + var->yres > var->yres_virtual)
		return -EINVAL;

	/*
	 * Check size of framebuffer.
	 */
	if (var->xres_virtual * var->yres_virtual *
			(var->bits_per_pixel >> 3) > fbi->fb_size)
		return -EINVAL;

	return 0;
}

static unsigned int chan_to_field(unsigned int chan, struct fb_bitfield *bf)
{
	return ((chan & 0xffff) >> (16 - bf->length)) << bf->offset;
}

static u32 to_rgb(u16 red, u16 green, u16 blue)
{
	red >>= 8;
	green >>= 8;
	blue >>= 8;

	return (red << 16) | (green << 8) | blue;
}

static int mmpfb_setcolreg(unsigned int regno, unsigned int red,
		unsigned int green, unsigned int blue,
		unsigned int trans, struct fb_info *info)
{
	struct mmpfb_info *fbi = info->par;
	u32 val;

	if (info->fix.visual == FB_VISUAL_TRUECOLOR && regno < 16) {
		val =  chan_to_field(red,   &info->var.red);
		val |= chan_to_field(green, &info->var.green);
		val |= chan_to_field(blue , &info->var.blue);
		fbi->pseudo_palette[regno] = val;
	}

	if (info->fix.visual == FB_VISUAL_PSEUDOCOLOR && regno < 256) {
		val = to_rgb(red, green, blue);
		/* TODO */
	}

	return 0;
}

static int mmpfb_pan_display(struct fb_var_screeninfo *var,
		struct fb_info *info)
{
	struct mmpfb_info *fbi = info->par;
	struct mmp_addr addr;

	memset(&addr, 0, sizeof(addr));
	addr.phys[0] = (var->yoffset * var->xres_virtual + var->xoffset)
		* var->bits_per_pixel / 8 + fbi->fb_start_dma;
	mmp_overlay_set_addr(fbi->overlay, &addr);

	return 0;
}

static int var_update(struct fb_info *info)
{
	struct mmpfb_info *fbi = info->par;
	struct fb_var_screeninfo *var = &info->var;
	struct fb_videomode *m;
	int pix_fmt;

	/* set pix_fmt */
	pix_fmt = var_to_pixfmt(var);
	if (pix_fmt < 0)
		return -EINVAL;
	pixfmt_to_var(var, pix_fmt);
	fbi->pix_fmt = pix_fmt;

	/* set var according to best video mode*/
	m = (struct fb_videomode *)fb_match_mode(var, &info->modelist);
	if (!m) {
		dev_err(fbi->dev, "set par: no match mode, use best mode\n");
		m = (struct fb_videomode *)fb_find_best_mode(var,
				&info->modelist);
		fb_videomode_to_var(var, m);
	}
	memcpy(&fbi->mode, m, sizeof(struct fb_videomode));

	/* fix to 2* yres */
	var->yres_virtual = var->yres * 2;
	info->fix.visual = (pix_fmt == PIXFMT_PSEUDOCOLOR) ?
		FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
	info->fix.line_length = var->xres_virtual * var->bits_per_pixel / 8;
	info->fix.ypanstep = var->yres;
	return 0;
}

static void mmpfb_set_win(struct fb_info *info)
{
	struct mmpfb_info *fbi = info->par;
	struct fb_var_screeninfo *var = &info->var;
	struct mmp_win win;
	u32 stride;

	memset(&win, 0, sizeof(win));
	win.xsrc = win.xdst = fbi->mode.xres;
	win.ysrc = win.ydst = fbi->mode.yres;
	win.pix_fmt = fbi->pix_fmt;
	stride = pixfmt_to_stride(win.pix_fmt);
	win.pitch[0] = var->xres_virtual * stride;
	win.pitch[1] = win.pitch[2] =
		(stride == 1) ? (var->xres_virtual >> 1) : 0;
	mmp_overlay_set_win(fbi->overlay, &win);
}

static int mmpfb_set_par(struct fb_info *info)
{
	struct mmpfb_info *fbi = info->par;
	struct fb_var_screeninfo *var = &info->var;
	struct mmp_addr addr;
	struct mmp_mode mode;
	int ret;

	ret = var_update(info);
	if (ret != 0)
		return ret;

	/* set window/path according to new videomode */
	fbmode_to_mmpmode(&mode, &fbi->mode, fbi->output_fmt);
	mmp_path_set_mode(fbi->path, &mode);

	/* set window related info */
	mmpfb_set_win(info);

	/* set address always */
	memset(&addr, 0, sizeof(addr));
	addr.phys[0] = (var->yoffset * var->xres_virtual + var->xoffset)
		* var->bits_per_pixel / 8 + fbi->fb_start_dma;
	mmp_overlay_set_addr(fbi->overlay, &addr);

	return 0;
}

static void mmpfb_power(struct mmpfb_info *fbi, int power)
{
	struct mmp_addr addr;
	struct fb_var_screeninfo *var = &fbi->fb_info->var;

	/* for power on, always set address/window again */
	if (power) {
		/* set window related info */
		mmpfb_set_win(fbi->fb_info);

		/* set address always */
		memset(&addr, 0, sizeof(addr));
		addr.phys[0] = fbi->fb_start_dma +
			(var->yoffset * var->xres_virtual + var->xoffset)
			* var->bits_per_pixel / 8;
		mmp_overlay_set_addr(fbi->overlay, &addr);
	}
	mmp_overlay_set_onoff(fbi->overlay, power);
}

static int mmpfb_blank(int blank, struct fb_info *info)
{
	struct mmpfb_info *fbi = info->par;

	mmpfb_power(fbi, (blank == FB_BLANK_UNBLANK));

	return 0;
}

static struct fb_ops mmpfb_ops = {
	.owner		= THIS_MODULE,
	.fb_blank	= mmpfb_blank,
	.fb_check_var	= mmpfb_check_var,
	.fb_set_par	= mmpfb_set_par,
	.fb_setcolreg	= mmpfb_setcolreg,
	.fb_pan_display	= mmpfb_pan_display,
	.fb_fillrect	= cfb_fillrect,
	.fb_copyarea	= cfb_copyarea,
	.fb_imageblit	= cfb_imageblit,
};

static int modes_setup(struct mmpfb_info *fbi)
{
	struct fb_videomode *videomodes;
	struct mmp_mode *mmp_modes;
	struct fb_info *info = fbi->fb_info;
	int videomode_num, i;

	/* get videomodes from path */
	videomode_num = mmp_path_get_modelist(fbi->path, &mmp_modes);
	if (!videomode_num) {
		dev_warn(fbi->dev, "can't get videomode num\n");
		return 0;
	}
	/* put videomode list to info structure */
	videomodes = kzalloc(sizeof(struct fb_videomode) * videomode_num,
			GFP_KERNEL);
	if (!videomodes) {
		dev_err(fbi->dev, "can't malloc video modes\n");
		return -ENOMEM;
	}
	for (i = 0; i < videomode_num; i++)
		mmpmode_to_fbmode(&videomodes[i], &mmp_modes[i]);
	fb_videomode_to_modelist(videomodes, videomode_num, &info->modelist);

	/* set videomode[0] as default mode */
	memcpy(&fbi->mode, &videomodes[0], sizeof(struct fb_videomode));
	fbi->output_fmt = mmp_modes[0].pix_fmt_out;
	fb_videomode_to_var(&info->var, &fbi->mode);
	mmp_path_set_mode(fbi->path, &mmp_modes[0]);

	kfree(videomodes);
	return videomode_num;
}

static int fb_info_setup(struct fb_info *info,
			struct mmpfb_info *fbi)
{
	int ret = 0;
	/* Initialise static fb parameters.*/
	info->flags = FBINFO_DEFAULT | FBINFO_PARTIAL_PAN_OK |
		FBINFO_HWACCEL_XPAN | FBINFO_HWACCEL_YPAN;
	info->node = -1;
	strcpy(info->fix.id, fbi->name);
	info->fix.type = FB_TYPE_PACKED_PIXELS;
	info->fix.type_aux = 0;
	info->fix.xpanstep = 0;
	info->fix.ypanstep = info->var.yres;
	info->fix.ywrapstep = 0;
	info->fix.accel = FB_ACCEL_NONE;
	info->fix.smem_start = fbi->fb_start_dma;
	info->fix.smem_len = fbi->fb_size;
	info->fix.visual = (fbi->pix_fmt == PIXFMT_PSEUDOCOLOR) ?
		FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
	info->fix.line_length = info->var.xres_virtual *
		info->var.bits_per_pixel / 8;
	info->fbops = &mmpfb_ops;
	info->pseudo_palette = fbi->pseudo_palette;
	info->screen_base = fbi->fb_start;
	info->screen_size = fbi->fb_size;

	/* For FB framework: Allocate color map and Register framebuffer*/
	if (fb_alloc_cmap(&info->cmap, 256, 0) < 0)
		ret = -ENOMEM;

	return ret;
}

static void fb_info_clear(struct fb_info *info)
{
	fb_dealloc_cmap(&info->cmap);
}

static int mmpfb_probe(struct platform_device *pdev)
{
	struct mmp_buffer_driver_mach_info *mi;
	struct fb_info *info = 0;
	struct mmpfb_info *fbi = 0;
	int ret, modes_num;

	mi = pdev->dev.platform_data;
	if (mi == NULL) {
		dev_err(&pdev->dev, "no platform data defined\n");
		return -EINVAL;
	}

	/* initialize fb */
	info = framebuffer_alloc(sizeof(struct mmpfb_info), &pdev->dev);
	if (info == NULL)
		return -ENOMEM;
	fbi = info->par;
	if (!fbi) {
		ret = -EINVAL;
		goto failed;
	}

	/* init fb */
	fbi->fb_info = info;
	platform_set_drvdata(pdev, fbi);
	fbi->dev = &pdev->dev;
	fbi->name = mi->name;
	fbi->pix_fmt = mi->default_pixfmt;
	pixfmt_to_var(&info->var, fbi->pix_fmt);
	mutex_init(&fbi->access_ok);

	/* get display path by name */
	fbi->path = mmp_get_path(mi->path_name);
	if (!fbi->path) {
		dev_err(&pdev->dev, "can't get the path %s\n", mi->path_name);
		ret = -EINVAL;
		goto failed_destroy_mutex;
	}

	dev_info(fbi->dev, "path %s get\n", fbi->path->name);

	/* get overlay */
	fbi->overlay = mmp_path_get_overlay(fbi->path, mi->overlay_id);
	if (!fbi->overlay) {
		ret = -EINVAL;
		goto failed_destroy_mutex;
	}
	/* set fetch used */
	mmp_overlay_set_fetch(fbi->overlay, mi->dmafetch_id);

	modes_num = modes_setup(fbi);
	if (modes_num < 0) {
		ret = modes_num;
		goto failed_destroy_mutex;
	}

	/*
	 * if get modes success, means not hotplug panels, use caculated buffer
	 * or use default size
	 */
	if (modes_num > 0) {
		/* fix to 2* yres */
		info->var.yres_virtual = info->var.yres * 2;

		/* Allocate framebuffer memory: size = modes xy *4 */
		fbi->fb_size = info->var.xres_virtual * info->var.yres_virtual
				* info->var.bits_per_pixel / 8;
	} else {
		fbi->fb_size = MMPFB_DEFAULT_SIZE;
	}

	fbi->fb_start = dma_alloc_coherent(&pdev->dev, PAGE_ALIGN(fbi->fb_size),
				&fbi->fb_start_dma, GFP_KERNEL);
	if (fbi->fb_start == NULL) {
		dev_err(&pdev->dev, "can't alloc framebuffer\n");
		ret = -ENOMEM;
		goto failed_destroy_mutex;
	}
	memset(fbi->fb_start, 0, fbi->fb_size);
	dev_info(fbi->dev, "fb %dk allocated\n", fbi->fb_size/1024);

	/* fb power on */
	if (modes_num > 0)
		mmpfb_power(fbi, 1);

	ret = fb_info_setup(info, fbi);
	if (ret < 0)
		goto failed_free_buff;

	ret = register_framebuffer(info);
	if (ret < 0) {
		dev_err(&pdev->dev, "Failed to register fb: %d\n", ret);
		ret = -ENXIO;
		goto failed_clear_info;
	}

	dev_info(fbi->dev, "loaded to /dev/fb%d <%s>.\n",
		info->node, info->fix.id);

#ifdef CONFIG_LOGO
	if (fbi->fb_start) {
		fb_prepare_logo(info, 0);
		fb_show_logo(info, 0);
	}
#endif

	return 0;

failed_clear_info:
	fb_info_clear(info);
failed_free_buff:
	dma_free_coherent(&pdev->dev, PAGE_ALIGN(fbi->fb_size), fbi->fb_start,
		fbi->fb_start_dma);
failed_destroy_mutex:
	mutex_destroy(&fbi->access_ok);
failed:
	dev_err(fbi->dev, "mmp-fb: frame buffer device init failed\n");

	framebuffer_release(info);

	return ret;
}

static struct platform_driver mmpfb_driver = {
	.driver		= {
		.name	= "mmp-fb",
		.owner	= THIS_MODULE,
	},
	.probe		= mmpfb_probe,
};

static int mmpfb_init(void)
{
	return platform_driver_register(&mmpfb_driver);
}
module_init(mmpfb_init);

MODULE_AUTHOR("Zhou Zhu <zhou.zhu@marvell.com>");
MODULE_DESCRIPTION("Framebuffer driver for Marvell displays");
MODULE_LICENSE("GPL");