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drm/i915: Unpin the hws if we fail to kmap.
[net-next-2.6.git] / drivers / gpu / drm / i915 / intel_fb.c
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79e53945
JB		 1/*
2 * Copyright © 2007 David Airlie
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 *
23 * Authors:
24 * David Airlie
25 */
26
27#include <linux/module.h>
28#include <linux/kernel.h>
29#include <linux/errno.h>
30#include <linux/string.h>
31#include <linux/mm.h>
32#include <linux/tty.h>
33#include <linux/slab.h>
34#include <linux/sysrq.h>
35#include <linux/delay.h>
36#include <linux/fb.h>
37#include <linux/init.h>
38
39#include "drmP.h"
40#include "drm.h"
41#include "drm_crtc.h"
42#include "intel_drv.h"
43#include "i915_drm.h"
44#include "i915_drv.h"
45
46struct intelfb_par {
47 struct drm_device *dev;
48 struct drm_display_mode *our_mode;
49 struct intel_framebuffer *intel_fb;
50 int crtc_count;
51 /* crtc currently bound to this */
52 uint32_t crtc_ids[2];
53};
54
55static int intelfb_setcolreg(unsigned regno, unsigned red, unsigned green,
56 unsigned blue, unsigned transp,
57 struct fb_info *info)
58{
59 struct intelfb_par *par = info->par;
60 struct drm_device *dev = par->dev;
61 struct drm_crtc *crtc;
62 int i;
63
64 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
65 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
66 struct drm_mode_set *modeset = &intel_crtc->mode_set;
67 struct drm_framebuffer *fb = modeset->fb;
68
69 for (i = 0; i < par->crtc_count; i++)
70 if (crtc->base.id == par->crtc_ids[i])
71 break;
72
73 if (i == par->crtc_count)
74 continue;
75
76
77 if (regno > 255)
78 return 1;
79
80 if (fb->depth == 8) {
81 intel_crtc_fb_gamma_set(crtc, red, green, blue, regno);
82 return 0;
83 }
84
85 if (regno < 16) {
86 switch (fb->depth) {
87 case 15:
88 fb->pseudo_palette[regno] = ((red & 0xf800) >> 1) |
89 ((green & 0xf800) >> 6) |
90 ((blue & 0xf800) >> 11);
91 break;
92 case 16:
93 fb->pseudo_palette[regno] = (red & 0xf800) |
94 ((green & 0xfc00) >> 5) |
95 ((blue & 0xf800) >> 11);
96 break;
97 case 24:
98 case 32:
99 fb->pseudo_palette[regno] = ((red & 0xff00) << 8) |
100 (green & 0xff00) |
101 ((blue & 0xff00) >> 8);
102 break;
103 }
104 }
105 }
106 return 0;
107}
108
109static int intelfb_check_var(struct fb_var_screeninfo *var,
110 struct fb_info *info)
111{
112 struct intelfb_par *par = info->par;
113 struct intel_framebuffer *intel_fb = par->intel_fb;
114 struct drm_framebuffer *fb = &intel_fb->base;
115 int depth;
116
117 if (var->pixclock == -1 || !var->pixclock)
118 return -EINVAL;
119
120 /* Need to resize the fb object !!! */
121 if (var->xres > fb->width || var->yres > fb->height) {
122 DRM_ERROR("Requested width/height is greater than current fb object %dx%d > %dx%d\n",var->xres,var->yres,fb->width,fb->height);
123 DRM_ERROR("Need resizing code.\n");
124 return -EINVAL;
125 }
126
127 switch (var->bits_per_pixel) {
128 case 16:
129 depth = (var->green.length == 6) ? 16 : 15;
130 break;
131 case 32:
132 depth = (var->transp.length > 0) ? 32 : 24;
133 break;
134 default:
135 depth = var->bits_per_pixel;
136 break;
137 }
138
139 switch (depth) {
140 case 8:
141 var->red.offset = 0;
142 var->green.offset = 0;
143 var->blue.offset = 0;
144 var->red.length = 8;
145 var->green.length = 8;
146 var->blue.length = 8;
147 var->transp.length = 0;
148 var->transp.offset = 0;
149 break;
150 case 15:
151 var->red.offset = 10;
152 var->green.offset = 5;
153 var->blue.offset = 0;
154 var->red.length = 5;
155 var->green.length = 5;
156 var->blue.length = 5;
157 var->transp.length = 1;
158 var->transp.offset = 15;
159 break;
160 case 16:
161 var->red.offset = 11;
162 var->green.offset = 5;
163 var->blue.offset = 0;
164 var->red.length = 5;
165 var->green.length = 6;
166 var->blue.length = 5;
167 var->transp.length = 0;
168 var->transp.offset = 0;
169 break;
170 case 24:
171 var->red.offset = 16;
172 var->green.offset = 8;
173 var->blue.offset = 0;
174 var->red.length = 8;
175 var->green.length = 8;
176 var->blue.length = 8;
177 var->transp.length = 0;
178 var->transp.offset = 0;
179 break;
180 case 32:
181 var->red.offset = 16;
182 var->green.offset = 8;
183 var->blue.offset = 0;
184 var->red.length = 8;
185 var->green.length = 8;
186 var->blue.length = 8;
187 var->transp.length = 8;
188 var->transp.offset = 24;
189 break;
190 default:
191 return -EINVAL;
192 }
193
194 return 0;
195}
196
197/* this will let fbcon do the mode init */
198/* FIXME: take mode config lock? */
199static int intelfb_set_par(struct fb_info *info)
200{
201 struct intelfb_par *par = info->par;
202 struct drm_device *dev = par->dev;
203 struct fb_var_screeninfo *var = &info->var;
204 int i;
205
206 DRM_DEBUG("%d %d\n", var->xres, var->pixclock);
207
208 if (var->pixclock != -1) {
209
210 DRM_ERROR("PIXEL CLCOK SET\n");
211 return -EINVAL;
212 } else {
213 struct drm_crtc *crtc;
214 int ret;
215
216 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
217 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
218
219 for (i = 0; i < par->crtc_count; i++)
220 if (crtc->base.id == par->crtc_ids[i])
221 break;
222
223 if (i == par->crtc_count)
224 continue;
225
226 if (crtc->fb == intel_crtc->mode_set.fb) {
227 mutex_lock(&dev->mode_config.mutex);
228 ret = crtc->funcs->set_config(&intel_crtc->mode_set);
229 mutex_unlock(&dev->mode_config.mutex);
230 if (ret)
231 return ret;
232 }
233 }
234 return 0;
235 }
236}
237
238static int intelfb_pan_display(struct fb_var_screeninfo *var,
239 struct fb_info *info)
240{
241 struct intelfb_par *par = info->par;
242 struct drm_device *dev = par->dev;
243 struct drm_mode_set *modeset;
244 struct drm_crtc *crtc;
245 struct intel_crtc *intel_crtc;
246 int ret = 0;
247 int i;
248
249 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
250 for (i = 0; i < par->crtc_count; i++)
251 if (crtc->base.id == par->crtc_ids[i])
252 break;
253
254 if (i == par->crtc_count)
255 continue;
256
257 intel_crtc = to_intel_crtc(crtc);
258 modeset = &intel_crtc->mode_set;
259
260 modeset->x = var->xoffset;
261 modeset->y = var->yoffset;
262
263 if (modeset->num_connectors) {
264 mutex_lock(&dev->mode_config.mutex);
265 ret = crtc->funcs->set_config(modeset);
266 mutex_unlock(&dev->mode_config.mutex);
267 if (!ret) {
268 info->var.xoffset = var->xoffset;
269 info->var.yoffset = var->yoffset;
270 }
271 }
272 }
273
274 return ret;
275}
276
277static void intelfb_on(struct fb_info *info)
278{
279 struct intelfb_par *par = info->par;
280 struct drm_device *dev = par->dev;
281 struct drm_crtc *crtc;
282 struct drm_encoder *encoder;
283 int i;
284
285 /*
286 * For each CRTC in this fb, find all associated encoders
287 * and turn them off, then turn off the CRTC.
288 */
289 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
290 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
291
292 for (i = 0; i < par->crtc_count; i++)
293 if (crtc->base.id == par->crtc_ids[i])
294 break;
295
296 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
297
298 /* Found a CRTC on this fb, now find encoders */
299 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
300 if (encoder->crtc == crtc) {
301 struct drm_encoder_helper_funcs *encoder_funcs;
302 encoder_funcs = encoder->helper_private;
303 encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
304 }
305 }
306 }
307}
308
309static void intelfb_off(struct fb_info *info, int dpms_mode)
310{
311 struct intelfb_par *par = info->par;
312 struct drm_device *dev = par->dev;
313 struct drm_crtc *crtc;
314 struct drm_encoder *encoder;
315 int i;
316
317 /*
318 * For each CRTC in this fb, find all associated encoders
319 * and turn them off, then turn off the CRTC.
320 */
321 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
322 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
323
324 for (i = 0; i < par->crtc_count; i++)
325 if (crtc->base.id == par->crtc_ids[i])
326 break;
327
328 /* Found a CRTC on this fb, now find encoders */
329 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
330 if (encoder->crtc == crtc) {
331 struct drm_encoder_helper_funcs *encoder_funcs;
332 encoder_funcs = encoder->helper_private;
333 encoder_funcs->dpms(encoder, dpms_mode);
334 }
335 }
336 if (dpms_mode == DRM_MODE_DPMS_OFF)
337 crtc_funcs->dpms(crtc, dpms_mode);
338 }
339}
340
b358d0a6 341static int intelfb_blank(int blank, struct fb_info *info)
79e53945
JB		 342{
343 switch (blank) {
344 case FB_BLANK_UNBLANK:
345 intelfb_on(info);
346 break;
347 case FB_BLANK_NORMAL:
348 intelfb_off(info, DRM_MODE_DPMS_STANDBY);
349 break;
350 case FB_BLANK_HSYNC_SUSPEND:
351 intelfb_off(info, DRM_MODE_DPMS_STANDBY);
352 break;
353 case FB_BLANK_VSYNC_SUSPEND:
354 intelfb_off(info, DRM_MODE_DPMS_SUSPEND);
355 break;
356 case FB_BLANK_POWERDOWN:
357 intelfb_off(info, DRM_MODE_DPMS_OFF);
358 break;
359 }
360 return 0;
361}
362
363static struct fb_ops intelfb_ops = {
364 .owner = THIS_MODULE,
365 .fb_check_var = intelfb_check_var,
366 .fb_set_par = intelfb_set_par,
367 .fb_setcolreg = intelfb_setcolreg,
368 .fb_fillrect = cfb_fillrect,
369 .fb_copyarea = cfb_copyarea,
370 .fb_imageblit = cfb_imageblit,
371 .fb_pan_display = intelfb_pan_display,
372 .fb_blank = intelfb_blank,
373};
374
375/**
376 * Curretly it is assumed that the old framebuffer is reused.
377 *
378 * LOCKING
379 * caller should hold the mode config lock.
380 *
381 */
382int intelfb_resize(struct drm_device *dev, struct drm_crtc *crtc)
383{
384 struct fb_info *info;
385 struct drm_framebuffer *fb;
386 struct drm_display_mode *mode = crtc->desired_mode;
387
388 fb = crtc->fb;
389 if (!fb)
390 return 1;
391
392 info = fb->fbdev;
393 if (!info)
394 return 1;
395
396 if (!mode)
397 return 1;
398
399 info->var.xres = mode->hdisplay;
400 info->var.right_margin = mode->hsync_start - mode->hdisplay;
401 info->var.hsync_len = mode->hsync_end - mode->hsync_start;
402 info->var.left_margin = mode->htotal - mode->hsync_end;
403 info->var.yres = mode->vdisplay;
404 info->var.lower_margin = mode->vsync_start - mode->vdisplay;
405 info->var.vsync_len = mode->vsync_end - mode->vsync_start;
406 info->var.upper_margin = mode->vtotal - mode->vsync_end;
407 info->var.pixclock = 10000000 / mode->htotal * 1000 / mode->vtotal * 100;
408 /* avoid overflow */
409 info->var.pixclock = info->var.pixclock * 1000 / mode->vrefresh;
410
411 return 0;
412}
413EXPORT_SYMBOL(intelfb_resize);
414
415static struct drm_mode_set kernelfb_mode;
416
d1e22c6e
HE		 417static int intelfb_panic(struct notifier_block *n, unsigned long ununsed,
418 void *panic_str)
79e53945
JB		 419{
420 DRM_ERROR("panic occurred, switching back to text console\n");
421
422 intelfb_restore();
423 return 0;
424}
79e53945
JB		 425
426static struct notifier_block paniced = {
427 .notifier_call = intelfb_panic,
428};
429
b358d0a6
HE		 430static int intelfb_create(struct drm_device *dev, uint32_t fb_width,
431 uint32_t fb_height, uint32_t surface_width,
432 uint32_t surface_height,
433 struct intel_framebuffer **intel_fb_p)
79e53945
JB		 434{
435 struct fb_info *info;
436 struct intelfb_par *par;
437 struct drm_framebuffer *fb;
438 struct intel_framebuffer *intel_fb;
439 struct drm_mode_fb_cmd mode_cmd;
440 struct drm_gem_object *fbo = NULL;
441 struct drm_i915_gem_object *obj_priv;
442 struct device *device = &dev->pdev->dev;
443 int size, ret, mmio_bar = IS_I9XX(dev) ? 0 : 1;
444
445 mode_cmd.width = surface_width;
446 mode_cmd.height = surface_height;
447
448 mode_cmd.bpp = 32;
e7da40f0 449 mode_cmd.pitch = ALIGN(mode_cmd.width * ((mode_cmd.bpp + 1) / 8), 64);
79e53945
JB		 450 mode_cmd.depth = 24;
451
452 size = mode_cmd.pitch * mode_cmd.height;
453 size = ALIGN(size, PAGE_SIZE);
454 fbo = drm_gem_object_alloc(dev, size);
455 if (!fbo) {
456 printk(KERN_ERR "failed to allocate framebuffer\n");
457 ret = -ENOMEM;
458 goto out;
459 }
460 obj_priv = fbo->driver_private;
461
462 mutex_lock(&dev->struct_mutex);
463
464 ret = i915_gem_object_pin(fbo, PAGE_SIZE);
465 if (ret) {
466 DRM_ERROR("failed to pin fb: %d\n", ret);
467 goto out_unref;
468 }
469
470 /* Flush everything out, we'll be doing GTT only from now on */
471 i915_gem_object_set_to_gtt_domain(fbo, 1);
472
473 ret = intel_framebuffer_create(dev, &mode_cmd, &fb, fbo);
474 if (ret) {
475 DRM_ERROR("failed to allocate fb.\n");
476 goto out_unref;
477 }
478
479 list_add(&fb->filp_head, &dev->mode_config.fb_kernel_list);
480
481 intel_fb = to_intel_framebuffer(fb);
482 *intel_fb_p = intel_fb;
483
484 info = framebuffer_alloc(sizeof(struct intelfb_par), device);
485 if (!info) {
486 ret = -ENOMEM;
487 goto out_unref;
488 }
489
490 par = info->par;
491
492 strcpy(info->fix.id, "inteldrmfb");
493 info->fix.type = FB_TYPE_PACKED_PIXELS;
494 info->fix.visual = FB_VISUAL_TRUECOLOR;
495 info->fix.type_aux = 0;
496 info->fix.xpanstep = 1; /* doing it in hw */
497 info->fix.ypanstep = 1; /* doing it in hw */
498 info->fix.ywrapstep = 0;
499 info->fix.accel = FB_ACCEL_I830;
500 info->fix.type_aux = 0;
501
502 info->flags = FBINFO_DEFAULT;
503
504 info->fbops = &intelfb_ops;
505
506 info->fix.line_length = fb->pitch;
507 info->fix.smem_start = dev->mode_config.fb_base + obj_priv->gtt_offset;
508 info->fix.smem_len = size;
509
510 info->flags = FBINFO_DEFAULT;
511
512 info->screen_base = ioremap_wc(dev->agp->base + obj_priv->gtt_offset,
513 size);
514 if (!info->screen_base) {
515 ret = -ENOSPC;
516 goto out_unref;
517 }
518 info->screen_size = size;
519
520// memset(info->screen_base, 0, size);
521
522 info->pseudo_palette = fb->pseudo_palette;
523 info->var.xres_virtual = fb->width;
524 info->var.yres_virtual = fb->height;
525 info->var.bits_per_pixel = fb->bits_per_pixel;
526 info->var.xoffset = 0;
527 info->var.yoffset = 0;
528 info->var.activate = FB_ACTIVATE_NOW;
529 info->var.height = -1;
530 info->var.width = -1;
531
532 info->var.xres = fb_width;
533 info->var.yres = fb_height;
534
535 /* FIXME: we really shouldn't expose mmio space at all */
536 info->fix.mmio_start = pci_resource_start(dev->pdev, mmio_bar);
537 info->fix.mmio_len = pci_resource_len(dev->pdev, mmio_bar);
538
539 info->pixmap.size = 64*1024;
540 info->pixmap.buf_align = 8;
541 info->pixmap.access_align = 32;
542 info->pixmap.flags = FB_PIXMAP_SYSTEM;
543 info->pixmap.scan_align = 1;
544
545 switch(fb->depth) {
546 case 8:
547 info->var.red.offset = 0;
548 info->var.green.offset = 0;
549 info->var.blue.offset = 0;
550 info->var.red.length = 8; /* 8bit DAC */
551 info->var.green.length = 8;
552 info->var.blue.length = 8;
553 info->var.transp.offset = 0;
554 info->var.transp.length = 0;
555 break;
556 case 15:
557 info->var.red.offset = 10;
558 info->var.green.offset = 5;
559 info->var.blue.offset = 0;
560 info->var.red.length = 5;
561 info->var.green.length = 5;
562 info->var.blue.length = 5;
563 info->var.transp.offset = 15;
564 info->var.transp.length = 1;
565 break;
566 case 16:
567 info->var.red.offset = 11;
568 info->var.green.offset = 5;
569 info->var.blue.offset = 0;
570 info->var.red.length = 5;
571 info->var.green.length = 6;
572 info->var.blue.length = 5;
573 info->var.transp.offset = 0;
574 break;
575 case 24:
576 info->var.red.offset = 16;
577 info->var.green.offset = 8;
578 info->var.blue.offset = 0;
579 info->var.red.length = 8;
580 info->var.green.length = 8;
581 info->var.blue.length = 8;
582 info->var.transp.offset = 0;
583 info->var.transp.length = 0;
584 break;
585 case 32:
586 info->var.red.offset = 16;
587 info->var.green.offset = 8;
588 info->var.blue.offset = 0;
589 info->var.red.length = 8;
590 info->var.green.length = 8;
591 info->var.blue.length = 8;
592 info->var.transp.offset = 24;
593 info->var.transp.length = 8;
594 break;
595 default:
596 break;
597 }
598
599 fb->fbdev = info;
600
601 par->intel_fb = intel_fb;
602 par->dev = dev;
603
604 /* To allow resizeing without swapping buffers */
605 printk("allocated %dx%d fb: 0x%08x, bo %p\n", intel_fb->base.width,
606 intel_fb->base.height, obj_priv->gtt_offset, fbo);
607
608 mutex_unlock(&dev->struct_mutex);
609 return 0;
610
611out_unref:
612 drm_gem_object_unreference(fbo);
613 mutex_unlock(&dev->struct_mutex);
614out:
615 return ret;
616}
617
618static int intelfb_multi_fb_probe_crtc(struct drm_device *dev, struct drm_crtc *crtc)
619{
620 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
621 struct intel_framebuffer *intel_fb;
622 struct drm_framebuffer *fb;
623 struct drm_connector *connector;
624 struct fb_info *info;
625 struct intelfb_par *par;
626 struct drm_mode_set *modeset;
627 unsigned int width, height;
628 int new_fb = 0;
629 int ret, i, conn_count;
630
631 if (!drm_helper_crtc_in_use(crtc))
632 return 0;
633
634 if (!crtc->desired_mode)
635 return 0;
636
637 width = crtc->desired_mode->hdisplay;
638 height = crtc->desired_mode->vdisplay;
639
640 /* is there an fb bound to this crtc already */
641 if (!intel_crtc->mode_set.fb) {
642 ret = intelfb_create(dev, width, height, width, height, &intel_fb);
643 if (ret)
644 return -EINVAL;
645 new_fb = 1;
646 } else {
647 fb = intel_crtc->mode_set.fb;
648 intel_fb = to_intel_framebuffer(fb);
649 if ((intel_fb->base.width < width) || (intel_fb->base.height < height))
650 return -EINVAL;
651 }
652
653 info = intel_fb->base.fbdev;
654 par = info->par;
655
656 modeset = &intel_crtc->mode_set;
657 modeset->fb = &intel_fb->base;
658 conn_count = 0;
659 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
660 if (connector->encoder)
661 if (connector->encoder->crtc == modeset->crtc) {
662 modeset->connectors[conn_count] = connector;
663 conn_count++;
664 if (conn_count > INTELFB_CONN_LIMIT)
665 BUG();
666 }
667 }
668
669 for (i = conn_count; i < INTELFB_CONN_LIMIT; i++)
670 modeset->connectors[i] = NULL;
671
672 par->crtc_ids[0] = crtc->base.id;
673
674 modeset->num_connectors = conn_count;
675 if (modeset->mode != modeset->crtc->desired_mode)
676 modeset->mode = modeset->crtc->desired_mode;
677
678 par->crtc_count = 1;
679
680 if (new_fb) {
681 info->var.pixclock = -1;
682 if (register_framebuffer(info) < 0)
683 return -EINVAL;
684 } else
685 intelfb_set_par(info);
686
687 printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
688 info->fix.id);
689
690 /* Switch back to kernel console on panic */
691 kernelfb_mode = *modeset;
692 atomic_notifier_chain_register(&panic_notifier_list, &paniced);
693 printk(KERN_INFO "registered panic notifier\n");
694
695 return 0;
696}
697
698static int intelfb_multi_fb_probe(struct drm_device *dev)
699{
700
701 struct drm_crtc *crtc;
702 int ret = 0;
703
704 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
705 ret = intelfb_multi_fb_probe_crtc(dev, crtc);
706 if (ret)
707 return ret;
708 }
709 return ret;
710}
711
712static int intelfb_single_fb_probe(struct drm_device *dev)
713{
714 struct drm_crtc *crtc;
715 struct drm_connector *connector;
716 unsigned int fb_width = (unsigned)-1, fb_height = (unsigned)-1;
717 unsigned int surface_width = 0, surface_height = 0;
718 int new_fb = 0;
719 int crtc_count = 0;
720 int ret, i, conn_count = 0;
721 struct intel_framebuffer *intel_fb;
722 struct fb_info *info;
723 struct intelfb_par *par;
724 struct drm_mode_set *modeset = NULL;
725
726 DRM_DEBUG("\n");
727
728 /* Get a count of crtcs now in use and new min/maxes width/heights */
729 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
730 if (!drm_helper_crtc_in_use(crtc))
731 continue;
732
733 crtc_count++;
734 if (!crtc->desired_mode)
735 continue;
736
737 /* Smallest mode determines console size... */
738 if (crtc->desired_mode->hdisplay < fb_width)
739 fb_width = crtc->desired_mode->hdisplay;
740
741 if (crtc->desired_mode->vdisplay < fb_height)
742 fb_height = crtc->desired_mode->vdisplay;
743
744 /* ... but largest for memory allocation dimensions */
745 if (crtc->desired_mode->hdisplay > surface_width)
746 surface_width = crtc->desired_mode->hdisplay;
747
748 if (crtc->desired_mode->vdisplay > surface_height)
749 surface_height = crtc->desired_mode->vdisplay;
750 }
751
752 if (crtc_count == 0 || fb_width == -1 || fb_height == -1) {
753 /* hmm everyone went away - assume VGA cable just fell out
754 and will come back later. */
755 DRM_DEBUG("no CRTCs available?\n");
756 return 0;
757 }
758
759//fail
760 /* Find the fb for our new config */
761 if (list_empty(&dev->mode_config.fb_kernel_list)) {
762 DRM_DEBUG("creating new fb (console size %dx%d, "
763 "buffer size %dx%d)\n", fb_width, fb_height,
764 surface_width, surface_height);
765 ret = intelfb_create(dev, fb_width, fb_height, surface_width,
766 surface_height, &intel_fb);
767 if (ret)
768 return -EINVAL;
769 new_fb = 1;
770 } else {
771 struct drm_framebuffer *fb;
772
773 fb = list_first_entry(&dev->mode_config.fb_kernel_list,
774 struct drm_framebuffer, filp_head);
775 intel_fb = to_intel_framebuffer(fb);
776
777 /* if someone hotplugs something bigger than we have already
778 * allocated, we are pwned. As really we can't resize an
779 * fbdev that is in the wild currently due to fbdev not really
780 * being designed for the lower layers moving stuff around
781 * under it.
782 * - so in the grand style of things - punt.
783 */
784 if ((fb->width < surface_width) ||
785 (fb->height < surface_height)) {
786 DRM_ERROR("fb not large enough for console\n");
787 return -EINVAL;
788 }
789 }
790// fail
791
792 info = intel_fb->base.fbdev;
793 par = info->par;
794
795 crtc_count = 0;
796 /*
797 * For each CRTC, set up the connector list for the CRTC's mode
798 * set configuration.
799 */
800 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
801 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
802
803 modeset = &intel_crtc->mode_set;
804 modeset->fb = &intel_fb->base;
805 conn_count = 0;
806 list_for_each_entry(connector, &dev->mode_config.connector_list,
807 head) {
808 if (!connector->encoder)
809 continue;
810
811 if(connector->encoder->crtc == modeset->crtc) {
812 modeset->connectors[conn_count++] = connector;
813 if (conn_count > INTELFB_CONN_LIMIT)
814 BUG();
815 }
816 }
817
818 /* Zero out remaining connector pointers */
819 for (i = conn_count; i < INTELFB_CONN_LIMIT; i++)
820 modeset->connectors[i] = NULL;
821
822 par->crtc_ids[crtc_count++] = crtc->base.id;
823
824 modeset->num_connectors = conn_count;
825 if (modeset->mode != modeset->crtc->desired_mode)
826 modeset->mode = modeset->crtc->desired_mode;
827 }
828 par->crtc_count = crtc_count;
829
830 if (new_fb) {
831 info->var.pixclock = -1;
832 if (register_framebuffer(info) < 0)
833 return -EINVAL;
834 } else
835 intelfb_set_par(info);
836
837 printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
838 info->fix.id);
839
840 /* Switch back to kernel console on panic */
841 kernelfb_mode = *modeset;
842 atomic_notifier_chain_register(&panic_notifier_list, &paniced);
843 printk(KERN_INFO "registered panic notifier\n");
844
845 return 0;
846}
847
848/**
849 * intelfb_restore - restore the framebuffer console (kernel) config
850 *
851 * Restore's the kernel's fbcon mode, used for lastclose & panic paths.
852 */
853void intelfb_restore(void)
854{
855 drm_crtc_helper_set_config(&kernelfb_mode);
856}
857
858static void intelfb_sysrq(int dummy1, struct tty_struct *dummy3)
859{
860 intelfb_restore();
861}
862
863static struct sysrq_key_op sysrq_intelfb_restore_op = {
864 .handler = intelfb_sysrq,
865 .help_msg = "force fb",
866 .action_msg = "force restore of fb console",
867};
868
869int intelfb_probe(struct drm_device *dev)
870{
871 int ret;
872
873 DRM_DEBUG("\n");
874
875 /* something has changed in the lower levels of hell - deal with it
876 here */
877
878 /* two modes : a) 1 fb to rule all crtcs.
879 b) one fb per crtc.
880 two actions 1) new connected device
881 2) device removed.
882 case a/1 : if the fb surface isn't big enough - resize the surface fb.
883 if the fb size isn't big enough - resize fb into surface.
884 if everything big enough configure the new crtc/etc.
885 case a/2 : undo the configuration
886 possibly resize down the fb to fit the new configuration.
887 case b/1 : see if it is on a new crtc - setup a new fb and add it.
888 case b/2 : teardown the new fb.
889 */
890
891 /* mode a first */
892 /* search for an fb */
893 if (i915_fbpercrtc == 1) {
894 ret = intelfb_multi_fb_probe(dev);
895 } else {
896 ret = intelfb_single_fb_probe(dev);
897 }
898
899 register_sysrq_key('g', &sysrq_intelfb_restore_op);
900
901 return ret;
902}
903EXPORT_SYMBOL(intelfb_probe);
904
905int intelfb_remove(struct drm_device *dev, struct drm_framebuffer *fb)
906{
907 struct fb_info *info;
908
909 if (!fb)
910 return -EINVAL;
911
912 info = fb->fbdev;
913
914 if (info) {
915 unregister_framebuffer(info);
916 iounmap(info->screen_base);
917 framebuffer_release(info);
918 }
919
920 atomic_notifier_chain_unregister(&panic_notifier_list, &paniced);
921 memset(&kernelfb_mode, 0, sizeof(struct drm_mode_set));
922 return 0;
923}
924EXPORT_SYMBOL(intelfb_remove);
925MODULE_LICENSE("GPL and additional rights");
Clone of davem's net-next-2.6 tree