summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/gma500/framebuffer.c
blob: 2590cac84257cd79cd2c01b4b6e1b16fd2dcebdf (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
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
/**************************************************************************
 * Copyright (c) 2007-2011, Intel Corporation.
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope 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, write to the Free Software Foundation, Inc.,
 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
 *
 **************************************************************************/

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/tty.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/console.h>

#include <drm/drmP.h>
#include <drm/drm.h>
#include <drm/drm_crtc.h>
#include <drm/drm_fb_helper.h>

#include "psb_drv.h"
#include "psb_intel_reg.h"
#include "psb_intel_drv.h"
#include "framebuffer.h"
#include "gtt.h"

static void psb_user_framebuffer_destroy(struct drm_framebuffer *fb);
static int psb_user_framebuffer_create_handle(struct drm_framebuffer *fb,
					      struct drm_file *file_priv,
					      unsigned int *handle);

static const struct drm_framebuffer_funcs psb_fb_funcs = {
	.destroy = psb_user_framebuffer_destroy,
	.create_handle = psb_user_framebuffer_create_handle,
};

#define CMAP_TOHW(_val, _width) ((((_val) << (_width)) + 0x7FFF - (_val)) >> 16)

static int psbfb_setcolreg(unsigned regno, unsigned red, unsigned green,
			   unsigned blue, unsigned transp,
			   struct fb_info *info)
{
	struct psb_fbdev *fbdev = info->par;
	struct drm_framebuffer *fb = fbdev->psb_fb_helper.fb;
	uint32_t v;

	if (!fb)
		return -ENOMEM;

	if (regno > 255)
		return 1;

	red = CMAP_TOHW(red, info->var.red.length);
	blue = CMAP_TOHW(blue, info->var.blue.length);
	green = CMAP_TOHW(green, info->var.green.length);
	transp = CMAP_TOHW(transp, info->var.transp.length);

	v = (red << info->var.red.offset) |
	    (green << info->var.green.offset) |
	    (blue << info->var.blue.offset) |
	    (transp << info->var.transp.offset);

	if (regno < 16) {
		switch (fb->bits_per_pixel) {
		case 16:
			((uint32_t *) info->pseudo_palette)[regno] = v;
			break;
		case 24:
		case 32:
			((uint32_t *) info->pseudo_palette)[regno] = v;
			break;
		}
	}

	return 0;
}

static int psbfb_pan(struct fb_var_screeninfo *var, struct fb_info *info)
{
	struct psb_fbdev *fbdev = info->par;
	struct psb_framebuffer *psbfb = &fbdev->pfb;
	struct drm_device *dev = psbfb->base.dev;

	/*
	 *	We have to poke our nose in here. The core fb code assumes
	 *	panning is part of the hardware that can be invoked before
	 *	the actual fb is mapped. In our case that isn't quite true.
	 */
	if (psbfb->gtt->npage) {
		/* GTT roll shifts in 4K pages, we need to shift the right
		   number of pages */
		int pages = info->fix.line_length >> 12;
		psb_gtt_roll(dev, psbfb->gtt, var->yoffset * pages);
	}
        return 0;
}

static int psbfb_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
{
	struct psb_framebuffer *psbfb = vma->vm_private_data;
	struct drm_device *dev = psbfb->base.dev;
	struct drm_psb_private *dev_priv = dev->dev_private;
	int page_num;
	int i;
	unsigned long address;
	int ret;
	unsigned long pfn;
	/* FIXME: assumes fb at stolen base which may not be true */
	unsigned long phys_addr = (unsigned long)dev_priv->stolen_base;

	page_num = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
	address = (unsigned long)vmf->virtual_address - (vmf->pgoff << PAGE_SHIFT);

	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);

	for (i = 0; i < page_num; i++) {
		pfn = (phys_addr >> PAGE_SHIFT);

		ret = vm_insert_mixed(vma, address, pfn);
		if (unlikely((ret == -EBUSY) || (ret != 0 && i > 0)))
			break;
		else if (unlikely(ret != 0)) {
			ret = (ret == -ENOMEM) ? VM_FAULT_OOM : VM_FAULT_SIGBUS;
			return ret;
		}
		address += PAGE_SIZE;
		phys_addr += PAGE_SIZE;
	}
	return VM_FAULT_NOPAGE;
}

static void psbfb_vm_open(struct vm_area_struct *vma)
{
}

static void psbfb_vm_close(struct vm_area_struct *vma)
{
}

static const struct vm_operations_struct psbfb_vm_ops = {
	.fault	= psbfb_vm_fault,
	.open	= psbfb_vm_open,
	.close	= psbfb_vm_close
};

static int psbfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
{
	struct psb_fbdev *fbdev = info->par;
	struct psb_framebuffer *psbfb = &fbdev->pfb;

	if (vma->vm_pgoff != 0)
		return -EINVAL;
	if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
		return -EINVAL;

	if (!psbfb->addr_space)
		psbfb->addr_space = vma->vm_file->f_mapping;
	/*
	 * If this is a GEM object then info->screen_base is the virtual
	 * kernel remapping of the object. FIXME: Review if this is
	 * suitable for our mmap work
	 */
	vma->vm_ops = &psbfb_vm_ops;
	vma->vm_private_data = (void *)psbfb;
	vma->vm_flags |= VM_IO | VM_MIXEDMAP | VM_DONTEXPAND | VM_DONTDUMP;
	return 0;
}

static int psbfb_ioctl(struct fb_info *info, unsigned int cmd,
						unsigned long arg)
{
	return -ENOTTY;
}

static struct fb_ops psbfb_ops = {
	.owner = THIS_MODULE,
	.fb_check_var = drm_fb_helper_check_var,
	.fb_set_par = drm_fb_helper_set_par,
	.fb_blank = drm_fb_helper_blank,
	.fb_setcolreg = psbfb_setcolreg,
	.fb_fillrect = cfb_fillrect,
	.fb_copyarea = psbfb_copyarea,
	.fb_imageblit = cfb_imageblit,
	.fb_mmap = psbfb_mmap,
	.fb_sync = psbfb_sync,
	.fb_ioctl = psbfb_ioctl,
};

static struct fb_ops psbfb_roll_ops = {
	.owner = THIS_MODULE,
	.fb_check_var = drm_fb_helper_check_var,
	.fb_set_par = drm_fb_helper_set_par,
	.fb_blank = drm_fb_helper_blank,
	.fb_setcolreg = psbfb_setcolreg,
	.fb_fillrect = cfb_fillrect,
	.fb_copyarea = cfb_copyarea,
	.fb_imageblit = cfb_imageblit,
	.fb_pan_display = psbfb_pan,
	.fb_mmap = psbfb_mmap,
	.fb_ioctl = psbfb_ioctl,
};

static struct fb_ops psbfb_unaccel_ops = {
	.owner = THIS_MODULE,
	.fb_check_var = drm_fb_helper_check_var,
	.fb_set_par = drm_fb_helper_set_par,
	.fb_blank = drm_fb_helper_blank,
	.fb_setcolreg = psbfb_setcolreg,
	.fb_fillrect = cfb_fillrect,
	.fb_copyarea = cfb_copyarea,
	.fb_imageblit = cfb_imageblit,
	.fb_mmap = psbfb_mmap,
	.fb_ioctl = psbfb_ioctl,
};

/**
 *	psb_framebuffer_init	-	initialize a framebuffer
 *	@dev: our DRM device
 *	@fb: framebuffer to set up
 *	@mode_cmd: mode description
 *	@gt: backing object
 *
 *	Configure and fill in the boilerplate for our frame buffer. Return
 *	0 on success or an error code if we fail.
 */
static int psb_framebuffer_init(struct drm_device *dev,
					struct psb_framebuffer *fb,
					struct drm_mode_fb_cmd2 *mode_cmd,
					struct gtt_range *gt)
{
	u32 bpp, depth;
	int ret;

	drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);

	if (mode_cmd->pitches[0] & 63)
		return -EINVAL;
	switch (bpp) {
	case 8:
	case 16:
	case 24:
	case 32:
		break;
	default:
		return -EINVAL;
	}
	drm_helper_mode_fill_fb_struct(&fb->base, mode_cmd);
	fb->gtt = gt;
	ret = drm_framebuffer_init(dev, &fb->base, &psb_fb_funcs);
	if (ret) {
		dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
		return ret;
	}
	return 0;
}

/**
 *	psb_framebuffer_create	-	create a framebuffer backed by gt
 *	@dev: our DRM device
 *	@mode_cmd: the description of the requested mode
 *	@gt: the backing object
 *
 *	Create a framebuffer object backed by the gt, and fill in the
 *	boilerplate required
 *
 *	TODO: review object references
 */

static struct drm_framebuffer *psb_framebuffer_create
			(struct drm_device *dev,
			 struct drm_mode_fb_cmd2 *mode_cmd,
			 struct gtt_range *gt)
{
	struct psb_framebuffer *fb;
	int ret;

	fb = kzalloc(sizeof(*fb), GFP_KERNEL);
	if (!fb)
		return ERR_PTR(-ENOMEM);

	ret = psb_framebuffer_init(dev, fb, mode_cmd, gt);
	if (ret) {
		kfree(fb);
		return ERR_PTR(ret);
	}
	return &fb->base;
}

/**
 *	psbfb_alloc		-	allocate frame buffer memory
 *	@dev: the DRM device
 *	@aligned_size: space needed
 *	@force: fall back to GEM buffers if need be
 *
 *	Allocate the frame buffer. In the usual case we get a GTT range that
 *	is stolen memory backed and life is simple. If there isn't sufficient
 *	we fail as we don't have the virtual mapping space to really vmap it
 *	and the kernel console code can't handle non linear framebuffers.
 *
 *	Re-address this as and if the framebuffer layer grows this ability.
 */
static struct gtt_range *psbfb_alloc(struct drm_device *dev, int aligned_size)
{
	struct gtt_range *backing;
	/* Begin by trying to use stolen memory backing */
	backing = psb_gtt_alloc_range(dev, aligned_size, "fb", 1);
	if (backing) {
		if (drm_gem_private_object_init(dev,
					&backing->gem, aligned_size) == 0)
			return backing;
		psb_gtt_free_range(dev, backing);
	}
	return NULL;
}

/**
 *	psbfb_create		-	create a framebuffer
 *	@fbdev: the framebuffer device
 *	@sizes: specification of the layout
 *
 *	Create a framebuffer to the specifications provided
 */
static int psbfb_create(struct psb_fbdev *fbdev,
				struct drm_fb_helper_surface_size *sizes)
{
	struct drm_device *dev = fbdev->psb_fb_helper.dev;
	struct drm_psb_private *dev_priv = dev->dev_private;
	struct fb_info *info;
	struct drm_framebuffer *fb;
	struct psb_framebuffer *psbfb = &fbdev->pfb;
	struct drm_mode_fb_cmd2 mode_cmd;
	struct device *device = &dev->pdev->dev;
	int size;
	int ret;
	struct gtt_range *backing;
	u32 bpp, depth;
	int gtt_roll = 0;
	int pitch_lines = 0;

	mode_cmd.width = sizes->surface_width;
	mode_cmd.height = sizes->surface_height;
	bpp = sizes->surface_bpp;
	depth = sizes->surface_depth;

	/* No 24bit packed */
	if (bpp == 24)
		bpp = 32;

	do {
		/*
		 * Acceleration via the GTT requires pitch to be
		 * power of two aligned. Preferably page but less
		 * is ok with some fonts
		 */
        	mode_cmd.pitches[0] =  ALIGN(mode_cmd.width * ((bpp + 7) / 8), 4096 >> pitch_lines);

        	size = mode_cmd.pitches[0] * mode_cmd.height;
        	size = ALIGN(size, PAGE_SIZE);

		/* Allocate the fb in the GTT with stolen page backing */
		backing = psbfb_alloc(dev, size);

		if (pitch_lines)
			pitch_lines *= 2;
		else
			pitch_lines = 1;
		gtt_roll++;
	} while (backing == NULL && pitch_lines <= 16);

	/* The final pitch we accepted if we succeeded */
	pitch_lines /= 2;

	if (backing == NULL) {
		/*
		 *	We couldn't get the space we wanted, fall back to the
		 *	display engine requirement instead.  The HW requires
		 *	the pitch to be 64 byte aligned
		 */

		gtt_roll = 0;	/* Don't use GTT accelerated scrolling */
		pitch_lines = 64;

		mode_cmd.pitches[0] =  ALIGN(mode_cmd.width * ((bpp + 7) / 8), 64);

		size = mode_cmd.pitches[0] * mode_cmd.height;
		size = ALIGN(size, PAGE_SIZE);

		/* Allocate the framebuffer in the GTT with stolen page backing */
		backing = psbfb_alloc(dev, size);
		if (backing == NULL)
			return -ENOMEM;
	}

	memset(dev_priv->vram_addr + backing->offset, 0, size);

	mutex_lock(&dev->struct_mutex);

	info = framebuffer_alloc(0, device);
	if (!info) {
		ret = -ENOMEM;
		goto out_err1;
	}
	info->par = fbdev;

	mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp, depth);

	ret = psb_framebuffer_init(dev, psbfb, &mode_cmd, backing);
	if (ret)
		goto out_unref;

	fb = &psbfb->base;
	psbfb->fbdev = info;

	fbdev->psb_fb_helper.fb = fb;
	fbdev->psb_fb_helper.fbdev = info;

	drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
	strcpy(info->fix.id, "psbfb");

	info->flags = FBINFO_DEFAULT;
	if (dev_priv->ops->accel_2d && pitch_lines > 8)	/* 2D engine */
		info->fbops = &psbfb_ops;
	else if (gtt_roll) {	/* GTT rolling seems best */
		info->fbops = &psbfb_roll_ops;
		info->flags |= FBINFO_HWACCEL_YPAN;
	} else	/* Software */
		info->fbops = &psbfb_unaccel_ops;

	ret = fb_alloc_cmap(&info->cmap, 256, 0);
	if (ret) {
		ret = -ENOMEM;
		goto out_unref;
	}

	info->fix.smem_start = dev->mode_config.fb_base;
	info->fix.smem_len = size;
	info->fix.ywrapstep = gtt_roll;
	info->fix.ypanstep = 0;

	/* Accessed stolen memory directly */
	info->screen_base = dev_priv->vram_addr + backing->offset;
	info->screen_size = size;

	if (dev_priv->gtt.stolen_size) {
		info->apertures = alloc_apertures(1);
		if (!info->apertures) {
			ret = -ENOMEM;
			goto out_unref;
		}
		info->apertures->ranges[0].base = dev->mode_config.fb_base;
		info->apertures->ranges[0].size = dev_priv->gtt.stolen_size;
	}

	drm_fb_helper_fill_var(info, &fbdev->psb_fb_helper,
				sizes->fb_width, sizes->fb_height);

	info->fix.mmio_start = pci_resource_start(dev->pdev, 0);
	info->fix.mmio_len = pci_resource_len(dev->pdev, 0);

	/* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */

	dev_dbg(dev->dev, "allocated %dx%d fb\n",
					psbfb->base.width, psbfb->base.height);

	mutex_unlock(&dev->struct_mutex);
	return 0;
out_unref:
	if (backing->stolen)
		psb_gtt_free_range(dev, backing);
	else
		drm_gem_object_unreference(&backing->gem);
out_err1:
	mutex_unlock(&dev->struct_mutex);
	psb_gtt_free_range(dev, backing);
	return ret;
}

/**
 *	psb_user_framebuffer_create	-	create framebuffer
 *	@dev: our DRM device
 *	@filp: client file
 *	@cmd: mode request
 *
 *	Create a new framebuffer backed by a userspace GEM object
 */
static struct drm_framebuffer *psb_user_framebuffer_create
			(struct drm_device *dev, struct drm_file *filp,
			 struct drm_mode_fb_cmd2 *cmd)
{
	struct gtt_range *r;
	struct drm_gem_object *obj;

	/*
	 *	Find the GEM object and thus the gtt range object that is
	 *	to back this space
	 */
	obj = drm_gem_object_lookup(dev, filp, cmd->handles[0]);
	if (obj == NULL)
		return ERR_PTR(-ENOENT);

	/* Let the core code do all the work */
	r = container_of(obj, struct gtt_range, gem);
	return psb_framebuffer_create(dev, cmd, r);
}

static void psbfb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
							u16 blue, int regno)
{
	struct psb_intel_crtc *intel_crtc = to_psb_intel_crtc(crtc);

	intel_crtc->lut_r[regno] = red >> 8;
	intel_crtc->lut_g[regno] = green >> 8;
	intel_crtc->lut_b[regno] = blue >> 8;
}

static void psbfb_gamma_get(struct drm_crtc *crtc, u16 *red,
					u16 *green, u16 *blue, int regno)
{
	struct psb_intel_crtc *intel_crtc = to_psb_intel_crtc(crtc);

	*red = intel_crtc->lut_r[regno] << 8;
	*green = intel_crtc->lut_g[regno] << 8;
	*blue = intel_crtc->lut_b[regno] << 8;
}

static int psbfb_probe(struct drm_fb_helper *helper,
				struct drm_fb_helper_surface_size *sizes)
{
	struct psb_fbdev *psb_fbdev = (struct psb_fbdev *)helper;
	struct drm_device *dev = psb_fbdev->psb_fb_helper.dev;
	struct drm_psb_private *dev_priv = dev->dev_private;
	int bytespp;

	bytespp = sizes->surface_bpp / 8;
	if (bytespp == 3)	/* no 24bit packed */
		bytespp = 4;

	/* If the mode will not fit in 32bit then switch to 16bit to get
	   a console on full resolution. The X mode setting server will
	   allocate its own 32bit GEM framebuffer */
	if (ALIGN(sizes->fb_width * bytespp, 64) * sizes->fb_height >
	                dev_priv->vram_stolen_size) {
                sizes->surface_bpp = 16;
                sizes->surface_depth = 16;
        }

	return psbfb_create(psb_fbdev, sizes);
}

static struct drm_fb_helper_funcs psb_fb_helper_funcs = {
	.gamma_set = psbfb_gamma_set,
	.gamma_get = psbfb_gamma_get,
	.fb_probe = psbfb_probe,
};

static int psb_fbdev_destroy(struct drm_device *dev, struct psb_fbdev *fbdev)
{
	struct fb_info *info;
	struct psb_framebuffer *psbfb = &fbdev->pfb;

	if (fbdev->psb_fb_helper.fbdev) {
		info = fbdev->psb_fb_helper.fbdev;
		unregister_framebuffer(info);
		if (info->cmap.len)
			fb_dealloc_cmap(&info->cmap);
		framebuffer_release(info);
	}
	drm_fb_helper_fini(&fbdev->psb_fb_helper);
	drm_framebuffer_unregister_private(&psbfb->base);
	drm_framebuffer_cleanup(&psbfb->base);

	if (psbfb->gtt)
		drm_gem_object_unreference(&psbfb->gtt->gem);
	return 0;
}

int psb_fbdev_init(struct drm_device *dev)
{
	struct psb_fbdev *fbdev;
	struct drm_psb_private *dev_priv = dev->dev_private;

	fbdev = kzalloc(sizeof(struct psb_fbdev), GFP_KERNEL);
	if (!fbdev) {
		dev_err(dev->dev, "no memory\n");
		return -ENOMEM;
	}

	dev_priv->fbdev = fbdev;
	fbdev->psb_fb_helper.funcs = &psb_fb_helper_funcs;

	drm_fb_helper_init(dev, &fbdev->psb_fb_helper, dev_priv->ops->crtcs,
							INTELFB_CONN_LIMIT);

	drm_fb_helper_single_add_all_connectors(&fbdev->psb_fb_helper);

	/* disable all the possible outputs/crtcs before entering KMS mode */
	drm_helper_disable_unused_functions(dev);

	drm_fb_helper_initial_config(&fbdev->psb_fb_helper, 32);
	return 0;
}

static void psb_fbdev_fini(struct drm_device *dev)
{
	struct drm_psb_private *dev_priv = dev->dev_private;

	if (!dev_priv->fbdev)
		return;

	psb_fbdev_destroy(dev, dev_priv->fbdev);
	kfree(dev_priv->fbdev);
	dev_priv->fbdev = NULL;
}

static void psbfb_output_poll_changed(struct drm_device *dev)
{
	struct drm_psb_private *dev_priv = dev->dev_private;
	struct psb_fbdev *fbdev = (struct psb_fbdev *)dev_priv->fbdev;
	drm_fb_helper_hotplug_event(&fbdev->psb_fb_helper);
}

/**
 *	psb_user_framebuffer_create_handle - add hamdle to a framebuffer
 *	@fb: framebuffer
 *	@file_priv: our DRM file
 *	@handle: returned handle
 *
 *	Our framebuffer object is a GTT range which also contains a GEM
 *	object. We need to turn it into a handle for userspace. GEM will do
 *	the work for us
 */
static int psb_user_framebuffer_create_handle(struct drm_framebuffer *fb,
					      struct drm_file *file_priv,
					      unsigned int *handle)
{
	struct psb_framebuffer *psbfb = to_psb_fb(fb);
	struct gtt_range *r = psbfb->gtt;
	return drm_gem_handle_create(file_priv, &r->gem, handle);
}

/**
 *	psb_user_framebuffer_destroy	-	destruct user created fb
 *	@fb: framebuffer
 *
 *	User framebuffers are backed by GEM objects so all we have to do is
 *	clean up a bit and drop the reference, GEM will handle the fallout
 */
static void psb_user_framebuffer_destroy(struct drm_framebuffer *fb)
{
	struct psb_framebuffer *psbfb = to_psb_fb(fb);
	struct gtt_range *r = psbfb->gtt;

	/* Let DRM do its clean up */
	drm_framebuffer_cleanup(fb);
	/*  We are no longer using the resource in GEM */
	drm_gem_object_unreference_unlocked(&r->gem);
	kfree(fb);
}

static const struct drm_mode_config_funcs psb_mode_funcs = {
	.fb_create = psb_user_framebuffer_create,
	.output_poll_changed = psbfb_output_poll_changed,
};

static int psb_create_backlight_property(struct drm_device *dev)
{
	struct drm_psb_private *dev_priv = dev->dev_private;
	struct drm_property *backlight;

	if (dev_priv->backlight_property)
		return 0;

	backlight = drm_property_create_range(dev, 0, "backlight", 0, 100);

	dev_priv->backlight_property = backlight;

	return 0;
}

static void psb_setup_outputs(struct drm_device *dev)
{
	struct drm_psb_private *dev_priv = dev->dev_private;
	struct drm_connector *connector;

	drm_mode_create_scaling_mode_property(dev);
	psb_create_backlight_property(dev);

	dev_priv->ops->output_init(dev);

	list_for_each_entry(connector, &dev->mode_config.connector_list,
			    head) {
		struct psb_intel_encoder *psb_intel_encoder =
			psb_intel_attached_encoder(connector);
		struct drm_encoder *encoder = &psb_intel_encoder->base;
		int crtc_mask = 0, clone_mask = 0;

		/* valid crtcs */
		switch (psb_intel_encoder->type) {
		case INTEL_OUTPUT_ANALOG:
			crtc_mask = (1 << 0);
			clone_mask = (1 << INTEL_OUTPUT_ANALOG);
			break;
		case INTEL_OUTPUT_SDVO:
			crtc_mask = ((1 << 0) | (1 << 1));
			clone_mask = (1 << INTEL_OUTPUT_SDVO);
			break;
		case INTEL_OUTPUT_LVDS:
		        crtc_mask = dev_priv->ops->lvds_mask;
			clone_mask = (1 << INTEL_OUTPUT_LVDS);
			break;
		case INTEL_OUTPUT_MIPI:
			crtc_mask = (1 << 0);
			clone_mask = (1 << INTEL_OUTPUT_MIPI);
			break;
		case INTEL_OUTPUT_MIPI2:
			crtc_mask = (1 << 2);
			clone_mask = (1 << INTEL_OUTPUT_MIPI2);
			break;
		case INTEL_OUTPUT_HDMI:
		        crtc_mask = dev_priv->ops->hdmi_mask;
			clone_mask = (1 << INTEL_OUTPUT_HDMI);
			break;
		case INTEL_OUTPUT_DISPLAYPORT:
			crtc_mask = (1 << 0) | (1 << 1);
			clone_mask = (1 << INTEL_OUTPUT_DISPLAYPORT);
			break;
		case INTEL_OUTPUT_EDP:
			crtc_mask = (1 << 1);
			clone_mask = (1 << INTEL_OUTPUT_EDP);
		}
		encoder->possible_crtcs = crtc_mask;
		encoder->possible_clones =
		    psb_intel_connector_clones(dev, clone_mask);
	}
}

void psb_modeset_init(struct drm_device *dev)
{
	struct drm_psb_private *dev_priv = dev->dev_private;
	struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
	int i;

	drm_mode_config_init(dev);

	dev->mode_config.min_width = 0;
	dev->mode_config.min_height = 0;

	dev->mode_config.funcs = &psb_mode_funcs;

	/* set memory base */
	/* Oaktrail and Poulsbo should use BAR 2*/
	pci_read_config_dword(dev->pdev, PSB_BSM, (u32 *)
					&(dev->mode_config.fb_base));

	/* num pipes is 2 for PSB but 1 for Mrst */
	for (i = 0; i < dev_priv->num_pipe; i++)
		psb_intel_crtc_init(dev, i, mode_dev);

	dev->mode_config.max_width = 2048;
	dev->mode_config.max_height = 2048;

	psb_setup_outputs(dev);

	if (dev_priv->ops->errata)
	        dev_priv->ops->errata(dev);

        dev_priv->modeset = true;
}

void psb_modeset_cleanup(struct drm_device *dev)
{
	struct drm_psb_private *dev_priv = dev->dev_private;
	if (dev_priv->modeset) {
		mutex_lock(&dev->struct_mutex);

		drm_kms_helper_poll_fini(dev);
		psb_fbdev_fini(dev);
		drm_mode_config_cleanup(dev);

		mutex_unlock(&dev->struct_mutex);
	}
}
OpenPOWER on IntegriCloud