1 /**************************************************************************
2  * Copyright (c) 2007-2011, Intel Corporation.
3  * All Rights Reserved.
4  *
5  * This program is free software; you can redistribute it and/or modify it
6  * under the terms and conditions of the GNU General Public License,
7  * version 2, as published by the Free Software Foundation.
8  *
9  * This program is distributed in the hope it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
12  * more details.
13  *
14  * You should have received a copy of the GNU General Public License along with
15  * this program; if not, write to the Free Software Foundation, Inc.,
16  * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
17  *
18  **************************************************************************/
19 
20 #include <linux/module.h>
21 #include <linux/kernel.h>
22 #include <linux/errno.h>
23 #include <linux/string.h>
24 #include <linux/mm.h>
25 #include <linux/tty.h>
26 #include <linux/slab.h>
27 #include <linux/delay.h>
28 #include <linux/fb.h>
29 #include <linux/init.h>
30 #include <linux/console.h>
31 
32 #include <drm/drmP.h>
33 #include <drm/drm.h>
34 #include <drm/drm_crtc.h>
35 #include <drm/drm_fb_helper.h>
36 
37 #include "psb_drv.h"
38 #include "psb_intel_reg.h"
39 #include "psb_intel_drv.h"
40 #include "framebuffer.h"
41 #include "gtt.h"
42 
43 static void psb_user_framebuffer_destroy(struct drm_framebuffer *fb);
44 static int psb_user_framebuffer_create_handle(struct drm_framebuffer *fb,
45 					      struct drm_file *file_priv,
46 					      unsigned int *handle);
47 
48 static const struct drm_framebuffer_funcs psb_fb_funcs = {
49 	.destroy = psb_user_framebuffer_destroy,
50 	.create_handle = psb_user_framebuffer_create_handle,
51 };
52 
53 #define CMAP_TOHW(_val, _width) ((((_val) << (_width)) + 0x7FFF - (_val)) >> 16)
54 
55 static int psbfb_setcolreg(unsigned regno, unsigned red, unsigned green,
56 			   unsigned blue, unsigned transp,
57 			   struct fb_info *info)
58 {
59 	struct psb_fbdev *fbdev = info->par;
60 	struct drm_framebuffer *fb = fbdev->psb_fb_helper.fb;
61 	uint32_t v;
62 
63 	if (!fb)
64 		return -ENOMEM;
65 
66 	if (regno > 255)
67 		return 1;
68 
69 	red = CMAP_TOHW(red, info->var.red.length);
70 	blue = CMAP_TOHW(blue, info->var.blue.length);
71 	green = CMAP_TOHW(green, info->var.green.length);
72 	transp = CMAP_TOHW(transp, info->var.transp.length);
73 
74 	v = (red << info->var.red.offset) |
75 	    (green << info->var.green.offset) |
76 	    (blue << info->var.blue.offset) |
77 	    (transp << info->var.transp.offset);
78 
79 	if (regno < 16) {
80 		switch (fb->bits_per_pixel) {
81 		case 16:
82 			((uint32_t *) info->pseudo_palette)[regno] = v;
83 			break;
84 		case 24:
85 		case 32:
86 			((uint32_t *) info->pseudo_palette)[regno] = v;
87 			break;
88 		}
89 	}
90 
91 	return 0;
92 }
93 
94 static int psbfb_pan(struct fb_var_screeninfo *var, struct fb_info *info)
95 {
96 	struct psb_fbdev *fbdev = info->par;
97 	struct psb_framebuffer *psbfb = &fbdev->pfb;
98 	struct drm_device *dev = psbfb->base.dev;
99 
100 	/*
101 	 *	We have to poke our nose in here. The core fb code assumes
102 	 *	panning is part of the hardware that can be invoked before
103 	 *	the actual fb is mapped. In our case that isn't quite true.
104 	 */
105 	if (psbfb->gtt->npage) {
106 		/* GTT roll shifts in 4K pages, we need to shift the right
107 		   number of pages */
108 		int pages = info->fix.line_length >> 12;
109 		psb_gtt_roll(dev, psbfb->gtt, var->yoffset * pages);
110 	}
111         return 0;
112 }
113 
114 static int psbfb_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
115 {
116 	struct psb_framebuffer *psbfb = vma->vm_private_data;
117 	struct drm_device *dev = psbfb->base.dev;
118 	struct drm_psb_private *dev_priv = dev->dev_private;
119 	int page_num;
120 	int i;
121 	unsigned long address;
122 	int ret;
123 	unsigned long pfn;
124 	unsigned long phys_addr = (unsigned long)dev_priv->stolen_base +
125 				  psbfb->gtt->offset;
126 
127 	page_num = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
128 	address = (unsigned long)vmf->virtual_address - (vmf->pgoff << PAGE_SHIFT);
129 
130 	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
131 
132 	for (i = 0; i < page_num; i++) {
133 		pfn = (phys_addr >> PAGE_SHIFT);
134 
135 		ret = vm_insert_mixed(vma, address, pfn);
136 		if (unlikely((ret == -EBUSY) || (ret != 0 && i > 0)))
137 			break;
138 		else if (unlikely(ret != 0)) {
139 			ret = (ret == -ENOMEM) ? VM_FAULT_OOM : VM_FAULT_SIGBUS;
140 			return ret;
141 		}
142 		address += PAGE_SIZE;
143 		phys_addr += PAGE_SIZE;
144 	}
145 	return VM_FAULT_NOPAGE;
146 }
147 
148 static void psbfb_vm_open(struct vm_area_struct *vma)
149 {
150 }
151 
152 static void psbfb_vm_close(struct vm_area_struct *vma)
153 {
154 }
155 
156 static const struct vm_operations_struct psbfb_vm_ops = {
157 	.fault	= psbfb_vm_fault,
158 	.open	= psbfb_vm_open,
159 	.close	= psbfb_vm_close
160 };
161 
162 static int psbfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
163 {
164 	struct psb_fbdev *fbdev = info->par;
165 	struct psb_framebuffer *psbfb = &fbdev->pfb;
166 
167 	if (vma->vm_pgoff != 0)
168 		return -EINVAL;
169 	if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
170 		return -EINVAL;
171 
172 	if (!psbfb->addr_space)
173 		psbfb->addr_space = vma->vm_file->f_mapping;
174 	/*
175 	 * If this is a GEM object then info->screen_base is the virtual
176 	 * kernel remapping of the object. FIXME: Review if this is
177 	 * suitable for our mmap work
178 	 */
179 	vma->vm_ops = &psbfb_vm_ops;
180 	vma->vm_private_data = (void *)psbfb;
181 	vma->vm_flags |= VM_IO | VM_MIXEDMAP | VM_DONTEXPAND | VM_DONTDUMP;
182 	return 0;
183 }
184 
185 static int psbfb_ioctl(struct fb_info *info, unsigned int cmd,
186 						unsigned long arg)
187 {
188 	return -ENOTTY;
189 }
190 
191 static struct fb_ops psbfb_ops = {
192 	.owner = THIS_MODULE,
193 	.fb_check_var = drm_fb_helper_check_var,
194 	.fb_set_par = drm_fb_helper_set_par,
195 	.fb_blank = drm_fb_helper_blank,
196 	.fb_setcolreg = psbfb_setcolreg,
197 	.fb_fillrect = cfb_fillrect,
198 	.fb_copyarea = psbfb_copyarea,
199 	.fb_imageblit = cfb_imageblit,
200 	.fb_mmap = psbfb_mmap,
201 	.fb_sync = psbfb_sync,
202 	.fb_ioctl = psbfb_ioctl,
203 };
204 
205 static struct fb_ops psbfb_roll_ops = {
206 	.owner = THIS_MODULE,
207 	.fb_check_var = drm_fb_helper_check_var,
208 	.fb_set_par = drm_fb_helper_set_par,
209 	.fb_blank = drm_fb_helper_blank,
210 	.fb_setcolreg = psbfb_setcolreg,
211 	.fb_fillrect = cfb_fillrect,
212 	.fb_copyarea = cfb_copyarea,
213 	.fb_imageblit = cfb_imageblit,
214 	.fb_pan_display = psbfb_pan,
215 	.fb_mmap = psbfb_mmap,
216 	.fb_ioctl = psbfb_ioctl,
217 };
218 
219 static struct fb_ops psbfb_unaccel_ops = {
220 	.owner = THIS_MODULE,
221 	.fb_check_var = drm_fb_helper_check_var,
222 	.fb_set_par = drm_fb_helper_set_par,
223 	.fb_blank = drm_fb_helper_blank,
224 	.fb_setcolreg = psbfb_setcolreg,
225 	.fb_fillrect = cfb_fillrect,
226 	.fb_copyarea = cfb_copyarea,
227 	.fb_imageblit = cfb_imageblit,
228 	.fb_mmap = psbfb_mmap,
229 	.fb_ioctl = psbfb_ioctl,
230 };
231 
232 /**
233  *	psb_framebuffer_init	-	initialize a framebuffer
234  *	@dev: our DRM device
235  *	@fb: framebuffer to set up
236  *	@mode_cmd: mode description
237  *	@gt: backing object
238  *
239  *	Configure and fill in the boilerplate for our frame buffer. Return
240  *	0 on success or an error code if we fail.
241  */
242 static int psb_framebuffer_init(struct drm_device *dev,
243 					struct psb_framebuffer *fb,
244 					struct drm_mode_fb_cmd2 *mode_cmd,
245 					struct gtt_range *gt)
246 {
247 	u32 bpp, depth;
248 	int ret;
249 
250 	drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
251 
252 	if (mode_cmd->pitches[0] & 63)
253 		return -EINVAL;
254 	switch (bpp) {
255 	case 8:
256 	case 16:
257 	case 24:
258 	case 32:
259 		break;
260 	default:
261 		return -EINVAL;
262 	}
263 	drm_helper_mode_fill_fb_struct(&fb->base, mode_cmd);
264 	fb->gtt = gt;
265 	ret = drm_framebuffer_init(dev, &fb->base, &psb_fb_funcs);
266 	if (ret) {
267 		dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
268 		return ret;
269 	}
270 	return 0;
271 }
272 
273 /**
274  *	psb_framebuffer_create	-	create a framebuffer backed by gt
275  *	@dev: our DRM device
276  *	@mode_cmd: the description of the requested mode
277  *	@gt: the backing object
278  *
279  *	Create a framebuffer object backed by the gt, and fill in the
280  *	boilerplate required
281  *
282  *	TODO: review object references
283  */
284 
285 static struct drm_framebuffer *psb_framebuffer_create
286 			(struct drm_device *dev,
287 			 struct drm_mode_fb_cmd2 *mode_cmd,
288 			 struct gtt_range *gt)
289 {
290 	struct psb_framebuffer *fb;
291 	int ret;
292 
293 	fb = kzalloc(sizeof(*fb), GFP_KERNEL);
294 	if (!fb)
295 		return ERR_PTR(-ENOMEM);
296 
297 	ret = psb_framebuffer_init(dev, fb, mode_cmd, gt);
298 	if (ret) {
299 		kfree(fb);
300 		return ERR_PTR(ret);
301 	}
302 	return &fb->base;
303 }
304 
305 /**
306  *	psbfb_alloc		-	allocate frame buffer memory
307  *	@dev: the DRM device
308  *	@aligned_size: space needed
309  *	@force: fall back to GEM buffers if need be
310  *
311  *	Allocate the frame buffer. In the usual case we get a GTT range that
312  *	is stolen memory backed and life is simple. If there isn't sufficient
313  *	we fail as we don't have the virtual mapping space to really vmap it
314  *	and the kernel console code can't handle non linear framebuffers.
315  *
316  *	Re-address this as and if the framebuffer layer grows this ability.
317  */
318 static struct gtt_range *psbfb_alloc(struct drm_device *dev, int aligned_size)
319 {
320 	struct gtt_range *backing;
321 	/* Begin by trying to use stolen memory backing */
322 	backing = psb_gtt_alloc_range(dev, aligned_size, "fb", 1, PAGE_SIZE);
323 	if (backing) {
324 		drm_gem_private_object_init(dev, &backing->gem, aligned_size);
325 		return backing;
326 	}
327 	return NULL;
328 }
329 
330 /**
331  *	psbfb_create		-	create a framebuffer
332  *	@fbdev: the framebuffer device
333  *	@sizes: specification of the layout
334  *
335  *	Create a framebuffer to the specifications provided
336  */
337 static int psbfb_create(struct psb_fbdev *fbdev,
338 				struct drm_fb_helper_surface_size *sizes)
339 {
340 	struct drm_device *dev = fbdev->psb_fb_helper.dev;
341 	struct drm_psb_private *dev_priv = dev->dev_private;
342 	struct fb_info *info;
343 	struct drm_framebuffer *fb;
344 	struct psb_framebuffer *psbfb = &fbdev->pfb;
345 	struct drm_mode_fb_cmd2 mode_cmd;
346 	struct device *device = &dev->pdev->dev;
347 	int size;
348 	int ret;
349 	struct gtt_range *backing;
350 	u32 bpp, depth;
351 	int gtt_roll = 0;
352 	int pitch_lines = 0;
353 
354 	mode_cmd.width = sizes->surface_width;
355 	mode_cmd.height = sizes->surface_height;
356 	bpp = sizes->surface_bpp;
357 	depth = sizes->surface_depth;
358 
359 	/* No 24bit packed */
360 	if (bpp == 24)
361 		bpp = 32;
362 
363 	do {
364 		/*
365 		 * Acceleration via the GTT requires pitch to be
366 		 * power of two aligned. Preferably page but less
367 		 * is ok with some fonts
368 		 */
369         	mode_cmd.pitches[0] =  ALIGN(mode_cmd.width * ((bpp + 7) / 8), 4096 >> pitch_lines);
370 
371         	size = mode_cmd.pitches[0] * mode_cmd.height;
372         	size = ALIGN(size, PAGE_SIZE);
373 
374 		/* Allocate the fb in the GTT with stolen page backing */
375 		backing = psbfb_alloc(dev, size);
376 
377 		if (pitch_lines)
378 			pitch_lines *= 2;
379 		else
380 			pitch_lines = 1;
381 		gtt_roll++;
382 	} while (backing == NULL && pitch_lines <= 16);
383 
384 	/* The final pitch we accepted if we succeeded */
385 	pitch_lines /= 2;
386 
387 	if (backing == NULL) {
388 		/*
389 		 *	We couldn't get the space we wanted, fall back to the
390 		 *	display engine requirement instead.  The HW requires
391 		 *	the pitch to be 64 byte aligned
392 		 */
393 
394 		gtt_roll = 0;	/* Don't use GTT accelerated scrolling */
395 		pitch_lines = 64;
396 
397 		mode_cmd.pitches[0] =  ALIGN(mode_cmd.width * ((bpp + 7) / 8), 64);
398 
399 		size = mode_cmd.pitches[0] * mode_cmd.height;
400 		size = ALIGN(size, PAGE_SIZE);
401 
402 		/* Allocate the framebuffer in the GTT with stolen page backing */
403 		backing = psbfb_alloc(dev, size);
404 		if (backing == NULL)
405 			return -ENOMEM;
406 	}
407 
408 	memset(dev_priv->vram_addr + backing->offset, 0, size);
409 
410 	mutex_lock(&dev->struct_mutex);
411 
412 	info = framebuffer_alloc(0, device);
413 	if (!info) {
414 		ret = -ENOMEM;
415 		goto out_err1;
416 	}
417 	info->par = fbdev;
418 
419 	mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp, depth);
420 
421 	ret = psb_framebuffer_init(dev, psbfb, &mode_cmd, backing);
422 	if (ret)
423 		goto out_unref;
424 
425 	fb = &psbfb->base;
426 	psbfb->fbdev = info;
427 
428 	fbdev->psb_fb_helper.fb = fb;
429 	fbdev->psb_fb_helper.fbdev = info;
430 
431 	drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
432 	strcpy(info->fix.id, "psbdrmfb");
433 
434 	info->flags = FBINFO_DEFAULT;
435 	if (dev_priv->ops->accel_2d && pitch_lines > 8)	/* 2D engine */
436 		info->fbops = &psbfb_ops;
437 	else if (gtt_roll) {	/* GTT rolling seems best */
438 		info->fbops = &psbfb_roll_ops;
439 		info->flags |= FBINFO_HWACCEL_YPAN;
440 	} else	/* Software */
441 		info->fbops = &psbfb_unaccel_ops;
442 
443 	ret = fb_alloc_cmap(&info->cmap, 256, 0);
444 	if (ret) {
445 		ret = -ENOMEM;
446 		goto out_unref;
447 	}
448 
449 	info->fix.smem_start = dev->mode_config.fb_base;
450 	info->fix.smem_len = size;
451 	info->fix.ywrapstep = gtt_roll;
452 	info->fix.ypanstep = 0;
453 
454 	/* Accessed stolen memory directly */
455 	info->screen_base = dev_priv->vram_addr + backing->offset;
456 	info->screen_size = size;
457 
458 	if (dev_priv->gtt.stolen_size) {
459 		info->apertures = alloc_apertures(1);
460 		if (!info->apertures) {
461 			ret = -ENOMEM;
462 			goto out_unref;
463 		}
464 		info->apertures->ranges[0].base = dev->mode_config.fb_base;
465 		info->apertures->ranges[0].size = dev_priv->gtt.stolen_size;
466 	}
467 
468 	drm_fb_helper_fill_var(info, &fbdev->psb_fb_helper,
469 				sizes->fb_width, sizes->fb_height);
470 
471 	info->fix.mmio_start = pci_resource_start(dev->pdev, 0);
472 	info->fix.mmio_len = pci_resource_len(dev->pdev, 0);
473 
474 	/* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
475 
476 	dev_dbg(dev->dev, "allocated %dx%d fb\n",
477 					psbfb->base.width, psbfb->base.height);
478 
479 	mutex_unlock(&dev->struct_mutex);
480 	return 0;
481 out_unref:
482 	if (backing->stolen)
483 		psb_gtt_free_range(dev, backing);
484 	else
485 		drm_gem_object_unreference(&backing->gem);
486 out_err1:
487 	mutex_unlock(&dev->struct_mutex);
488 	psb_gtt_free_range(dev, backing);
489 	return ret;
490 }
491 
492 /**
493  *	psb_user_framebuffer_create	-	create framebuffer
494  *	@dev: our DRM device
495  *	@filp: client file
496  *	@cmd: mode request
497  *
498  *	Create a new framebuffer backed by a userspace GEM object
499  */
500 static struct drm_framebuffer *psb_user_framebuffer_create
501 			(struct drm_device *dev, struct drm_file *filp,
502 			 struct drm_mode_fb_cmd2 *cmd)
503 {
504 	struct gtt_range *r;
505 	struct drm_gem_object *obj;
506 
507 	/*
508 	 *	Find the GEM object and thus the gtt range object that is
509 	 *	to back this space
510 	 */
511 	obj = drm_gem_object_lookup(dev, filp, cmd->handles[0]);
512 	if (obj == NULL)
513 		return ERR_PTR(-ENOENT);
514 
515 	/* Let the core code do all the work */
516 	r = container_of(obj, struct gtt_range, gem);
517 	return psb_framebuffer_create(dev, cmd, r);
518 }
519 
520 static void psbfb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
521 							u16 blue, int regno)
522 {
523 	struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
524 
525 	gma_crtc->lut_r[regno] = red >> 8;
526 	gma_crtc->lut_g[regno] = green >> 8;
527 	gma_crtc->lut_b[regno] = blue >> 8;
528 }
529 
530 static void psbfb_gamma_get(struct drm_crtc *crtc, u16 *red,
531 					u16 *green, u16 *blue, int regno)
532 {
533 	struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
534 
535 	*red = gma_crtc->lut_r[regno] << 8;
536 	*green = gma_crtc->lut_g[regno] << 8;
537 	*blue = gma_crtc->lut_b[regno] << 8;
538 }
539 
540 static int psbfb_probe(struct drm_fb_helper *helper,
541 				struct drm_fb_helper_surface_size *sizes)
542 {
543 	struct psb_fbdev *psb_fbdev = (struct psb_fbdev *)helper;
544 	struct drm_device *dev = psb_fbdev->psb_fb_helper.dev;
545 	struct drm_psb_private *dev_priv = dev->dev_private;
546 	int bytespp;
547 
548 	bytespp = sizes->surface_bpp / 8;
549 	if (bytespp == 3)	/* no 24bit packed */
550 		bytespp = 4;
551 
552 	/* If the mode will not fit in 32bit then switch to 16bit to get
553 	   a console on full resolution. The X mode setting server will
554 	   allocate its own 32bit GEM framebuffer */
555 	if (ALIGN(sizes->fb_width * bytespp, 64) * sizes->fb_height >
556 	                dev_priv->vram_stolen_size) {
557                 sizes->surface_bpp = 16;
558                 sizes->surface_depth = 16;
559         }
560 
561 	return psbfb_create(psb_fbdev, sizes);
562 }
563 
564 static struct drm_fb_helper_funcs psb_fb_helper_funcs = {
565 	.gamma_set = psbfb_gamma_set,
566 	.gamma_get = psbfb_gamma_get,
567 	.fb_probe = psbfb_probe,
568 };
569 
570 static int psb_fbdev_destroy(struct drm_device *dev, struct psb_fbdev *fbdev)
571 {
572 	struct fb_info *info;
573 	struct psb_framebuffer *psbfb = &fbdev->pfb;
574 
575 	if (fbdev->psb_fb_helper.fbdev) {
576 		info = fbdev->psb_fb_helper.fbdev;
577 		unregister_framebuffer(info);
578 		if (info->cmap.len)
579 			fb_dealloc_cmap(&info->cmap);
580 		framebuffer_release(info);
581 	}
582 	drm_fb_helper_fini(&fbdev->psb_fb_helper);
583 	drm_framebuffer_unregister_private(&psbfb->base);
584 	drm_framebuffer_cleanup(&psbfb->base);
585 
586 	if (psbfb->gtt)
587 		drm_gem_object_unreference(&psbfb->gtt->gem);
588 	return 0;
589 }
590 
591 int psb_fbdev_init(struct drm_device *dev)
592 {
593 	struct psb_fbdev *fbdev;
594 	struct drm_psb_private *dev_priv = dev->dev_private;
595 
596 	fbdev = kzalloc(sizeof(struct psb_fbdev), GFP_KERNEL);
597 	if (!fbdev) {
598 		dev_err(dev->dev, "no memory\n");
599 		return -ENOMEM;
600 	}
601 
602 	dev_priv->fbdev = fbdev;
603 	fbdev->psb_fb_helper.funcs = &psb_fb_helper_funcs;
604 
605 	drm_fb_helper_init(dev, &fbdev->psb_fb_helper, dev_priv->ops->crtcs,
606 							INTELFB_CONN_LIMIT);
607 
608 	drm_fb_helper_single_add_all_connectors(&fbdev->psb_fb_helper);
609 
610 	/* disable all the possible outputs/crtcs before entering KMS mode */
611 	drm_helper_disable_unused_functions(dev);
612 
613 	drm_fb_helper_initial_config(&fbdev->psb_fb_helper, 32);
614 	return 0;
615 }
616 
617 static void psb_fbdev_fini(struct drm_device *dev)
618 {
619 	struct drm_psb_private *dev_priv = dev->dev_private;
620 
621 	if (!dev_priv->fbdev)
622 		return;
623 
624 	psb_fbdev_destroy(dev, dev_priv->fbdev);
625 	kfree(dev_priv->fbdev);
626 	dev_priv->fbdev = NULL;
627 }
628 
629 static void psbfb_output_poll_changed(struct drm_device *dev)
630 {
631 	struct drm_psb_private *dev_priv = dev->dev_private;
632 	struct psb_fbdev *fbdev = (struct psb_fbdev *)dev_priv->fbdev;
633 	drm_fb_helper_hotplug_event(&fbdev->psb_fb_helper);
634 }
635 
636 /**
637  *	psb_user_framebuffer_create_handle - add hamdle to a framebuffer
638  *	@fb: framebuffer
639  *	@file_priv: our DRM file
640  *	@handle: returned handle
641  *
642  *	Our framebuffer object is a GTT range which also contains a GEM
643  *	object. We need to turn it into a handle for userspace. GEM will do
644  *	the work for us
645  */
646 static int psb_user_framebuffer_create_handle(struct drm_framebuffer *fb,
647 					      struct drm_file *file_priv,
648 					      unsigned int *handle)
649 {
650 	struct psb_framebuffer *psbfb = to_psb_fb(fb);
651 	struct gtt_range *r = psbfb->gtt;
652 	return drm_gem_handle_create(file_priv, &r->gem, handle);
653 }
654 
655 /**
656  *	psb_user_framebuffer_destroy	-	destruct user created fb
657  *	@fb: framebuffer
658  *
659  *	User framebuffers are backed by GEM objects so all we have to do is
660  *	clean up a bit and drop the reference, GEM will handle the fallout
661  */
662 static void psb_user_framebuffer_destroy(struct drm_framebuffer *fb)
663 {
664 	struct psb_framebuffer *psbfb = to_psb_fb(fb);
665 	struct gtt_range *r = psbfb->gtt;
666 
667 	/* Let DRM do its clean up */
668 	drm_framebuffer_cleanup(fb);
669 	/*  We are no longer using the resource in GEM */
670 	drm_gem_object_unreference_unlocked(&r->gem);
671 	kfree(fb);
672 }
673 
674 static const struct drm_mode_config_funcs psb_mode_funcs = {
675 	.fb_create = psb_user_framebuffer_create,
676 	.output_poll_changed = psbfb_output_poll_changed,
677 };
678 
679 static int psb_create_backlight_property(struct drm_device *dev)
680 {
681 	struct drm_psb_private *dev_priv = dev->dev_private;
682 	struct drm_property *backlight;
683 
684 	if (dev_priv->backlight_property)
685 		return 0;
686 
687 	backlight = drm_property_create_range(dev, 0, "backlight", 0, 100);
688 
689 	dev_priv->backlight_property = backlight;
690 
691 	return 0;
692 }
693 
694 static void psb_setup_outputs(struct drm_device *dev)
695 {
696 	struct drm_psb_private *dev_priv = dev->dev_private;
697 	struct drm_connector *connector;
698 
699 	drm_mode_create_scaling_mode_property(dev);
700 	psb_create_backlight_property(dev);
701 
702 	dev_priv->ops->output_init(dev);
703 
704 	list_for_each_entry(connector, &dev->mode_config.connector_list,
705 			    head) {
706 		struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
707 		struct drm_encoder *encoder = &gma_encoder->base;
708 		int crtc_mask = 0, clone_mask = 0;
709 
710 		/* valid crtcs */
711 		switch (gma_encoder->type) {
712 		case INTEL_OUTPUT_ANALOG:
713 			crtc_mask = (1 << 0);
714 			clone_mask = (1 << INTEL_OUTPUT_ANALOG);
715 			break;
716 		case INTEL_OUTPUT_SDVO:
717 			crtc_mask = dev_priv->ops->sdvo_mask;
718 			clone_mask = (1 << INTEL_OUTPUT_SDVO);
719 			break;
720 		case INTEL_OUTPUT_LVDS:
721 		        crtc_mask = dev_priv->ops->lvds_mask;
722 			clone_mask = (1 << INTEL_OUTPUT_LVDS);
723 			break;
724 		case INTEL_OUTPUT_MIPI:
725 			crtc_mask = (1 << 0);
726 			clone_mask = (1 << INTEL_OUTPUT_MIPI);
727 			break;
728 		case INTEL_OUTPUT_MIPI2:
729 			crtc_mask = (1 << 2);
730 			clone_mask = (1 << INTEL_OUTPUT_MIPI2);
731 			break;
732 		case INTEL_OUTPUT_HDMI:
733 		        crtc_mask = dev_priv->ops->hdmi_mask;
734 			clone_mask = (1 << INTEL_OUTPUT_HDMI);
735 			break;
736 		case INTEL_OUTPUT_DISPLAYPORT:
737 			crtc_mask = (1 << 0) | (1 << 1);
738 			clone_mask = (1 << INTEL_OUTPUT_DISPLAYPORT);
739 			break;
740 		case INTEL_OUTPUT_EDP:
741 			crtc_mask = (1 << 1);
742 			clone_mask = (1 << INTEL_OUTPUT_EDP);
743 		}
744 		encoder->possible_crtcs = crtc_mask;
745 		encoder->possible_clones =
746 		    gma_connector_clones(dev, clone_mask);
747 	}
748 }
749 
750 void psb_modeset_init(struct drm_device *dev)
751 {
752 	struct drm_psb_private *dev_priv = dev->dev_private;
753 	struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
754 	int i;
755 
756 	drm_mode_config_init(dev);
757 
758 	dev->mode_config.min_width = 0;
759 	dev->mode_config.min_height = 0;
760 
761 	dev->mode_config.funcs = &psb_mode_funcs;
762 
763 	/* set memory base */
764 	/* Oaktrail and Poulsbo should use BAR 2*/
765 	pci_read_config_dword(dev->pdev, PSB_BSM, (u32 *)
766 					&(dev->mode_config.fb_base));
767 
768 	/* num pipes is 2 for PSB but 1 for Mrst */
769 	for (i = 0; i < dev_priv->num_pipe; i++)
770 		psb_intel_crtc_init(dev, i, mode_dev);
771 
772 	dev->mode_config.max_width = 4096;
773 	dev->mode_config.max_height = 4096;
774 
775 	psb_setup_outputs(dev);
776 
777 	if (dev_priv->ops->errata)
778 	        dev_priv->ops->errata(dev);
779 
780         dev_priv->modeset = true;
781 }
782 
783 void psb_modeset_cleanup(struct drm_device *dev)
784 {
785 	struct drm_psb_private *dev_priv = dev->dev_private;
786 	if (dev_priv->modeset) {
787 		mutex_lock(&dev->struct_mutex);
788 
789 		drm_kms_helper_poll_fini(dev);
790 		psb_fbdev_fini(dev);
791 		drm_mode_config_cleanup(dev);
792 
793 		mutex_unlock(&dev->struct_mutex);
794 	}
795 }
796