Line data Source code
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 : #ifdef __linux__
28 : #include <linux/async.h>
29 : #include <linux/module.h>
30 : #include <linux/kernel.h>
31 : #include <linux/console.h>
32 : #include <linux/errno.h>
33 : #include <linux/string.h>
34 : #include <linux/mm.h>
35 : #include <linux/tty.h>
36 : #include <linux/sysrq.h>
37 : #include <linux/delay.h>
38 : #include <linux/fb.h>
39 : #include <linux/init.h>
40 : #include <linux/vga_switcheroo.h>
41 : #endif
42 :
43 : #include <dev/pci/drm/drmP.h>
44 : #include <dev/pci/drm/drm_crtc.h>
45 : #include <dev/pci/drm/drm_fb_helper.h>
46 : #include "intel_drv.h"
47 : #include <dev/pci/drm/i915_drm.h>
48 : #include "i915_drv.h"
49 :
50 : #ifdef notyet
51 :
52 : static int intel_fbdev_set_par(struct fb_info *info)
53 : {
54 : struct drm_fb_helper *fb_helper = info->par;
55 : struct intel_fbdev *ifbdev =
56 : container_of(fb_helper, struct intel_fbdev, helper);
57 : int ret;
58 :
59 : ret = drm_fb_helper_set_par(info);
60 :
61 : if (ret == 0) {
62 : mutex_lock(&fb_helper->dev->struct_mutex);
63 : intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT);
64 : mutex_unlock(&fb_helper->dev->struct_mutex);
65 : }
66 :
67 : return ret;
68 : }
69 :
70 : static int intel_fbdev_blank(int blank, struct fb_info *info)
71 : {
72 : struct drm_fb_helper *fb_helper = info->par;
73 : struct intel_fbdev *ifbdev =
74 : container_of(fb_helper, struct intel_fbdev, helper);
75 : int ret;
76 :
77 : ret = drm_fb_helper_blank(blank, info);
78 :
79 : if (ret == 0) {
80 : mutex_lock(&fb_helper->dev->struct_mutex);
81 : intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT);
82 : mutex_unlock(&fb_helper->dev->struct_mutex);
83 : }
84 :
85 : return ret;
86 : }
87 :
88 : static int intel_fbdev_pan_display(struct fb_var_screeninfo *var,
89 : struct fb_info *info)
90 : {
91 : struct drm_fb_helper *fb_helper = info->par;
92 : struct intel_fbdev *ifbdev =
93 : container_of(fb_helper, struct intel_fbdev, helper);
94 :
95 : int ret;
96 : ret = drm_fb_helper_pan_display(var, info);
97 :
98 : if (ret == 0) {
99 : mutex_lock(&fb_helper->dev->struct_mutex);
100 : intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT);
101 : mutex_unlock(&fb_helper->dev->struct_mutex);
102 : }
103 :
104 : return ret;
105 : }
106 :
107 : static struct fb_ops intelfb_ops = {
108 : .owner = THIS_MODULE,
109 : .fb_check_var = drm_fb_helper_check_var,
110 : .fb_set_par = intel_fbdev_set_par,
111 : .fb_fillrect = drm_fb_helper_cfb_fillrect,
112 : .fb_copyarea = drm_fb_helper_cfb_copyarea,
113 : .fb_imageblit = drm_fb_helper_cfb_imageblit,
114 : .fb_pan_display = intel_fbdev_pan_display,
115 : .fb_blank = intel_fbdev_blank,
116 : .fb_setcmap = drm_fb_helper_setcmap,
117 : .fb_debug_enter = drm_fb_helper_debug_enter,
118 : .fb_debug_leave = drm_fb_helper_debug_leave,
119 : };
120 :
121 : #endif
122 :
123 0 : static int intelfb_alloc(struct drm_fb_helper *helper,
124 : struct drm_fb_helper_surface_size *sizes)
125 : {
126 : struct intel_fbdev *ifbdev =
127 0 : container_of(helper, struct intel_fbdev, helper);
128 : struct drm_framebuffer *fb;
129 0 : struct drm_device *dev = helper->dev;
130 0 : struct drm_i915_private *dev_priv = to_i915(dev);
131 0 : struct drm_mode_fb_cmd2 mode_cmd = {};
132 : struct drm_i915_gem_object *obj = NULL;
133 : int size, ret;
134 :
135 : /* we don't do packed 24bpp */
136 0 : if (sizes->surface_bpp == 24)
137 0 : sizes->surface_bpp = 32;
138 :
139 0 : mode_cmd.width = sizes->surface_width;
140 0 : mode_cmd.height = sizes->surface_height;
141 :
142 0 : mode_cmd.pitches[0] = round_up(mode_cmd.width *
143 : DIV_ROUND_UP(sizes->surface_bpp, 8), 64);
144 0 : mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
145 0 : sizes->surface_depth);
146 :
147 0 : size = mode_cmd.pitches[0] * mode_cmd.height;
148 0 : size = PAGE_ALIGN(size);
149 :
150 : /* If the FB is too big, just don't use it since fbdev is not very
151 : * important and we should probably use that space with FBC or other
152 : * features. */
153 0 : if (size * 2 < dev_priv->gtt.stolen_usable_size)
154 0 : obj = i915_gem_object_create_stolen(dev, size);
155 0 : if (obj == NULL)
156 0 : obj = i915_gem_alloc_object(dev, size);
157 0 : if (!obj) {
158 0 : DRM_ERROR("failed to allocate framebuffer\n");
159 : ret = -ENOMEM;
160 0 : goto out;
161 : }
162 :
163 0 : fb = __intel_framebuffer_create(dev, &mode_cmd, obj);
164 0 : if (IS_ERR(fb)) {
165 0 : ret = PTR_ERR(fb);
166 0 : goto out_unref;
167 : }
168 :
169 : /* Flush everything out, we'll be doing GTT only from now on */
170 0 : ret = intel_pin_and_fence_fb_obj(NULL, fb, NULL, NULL, NULL);
171 0 : if (ret) {
172 0 : DRM_ERROR("failed to pin obj: %d\n", ret);
173 : goto out_fb;
174 : }
175 :
176 0 : ifbdev->fb = to_intel_framebuffer(fb);
177 :
178 0 : return 0;
179 :
180 : out_fb:
181 0 : drm_framebuffer_remove(fb);
182 : out_unref:
183 0 : drm_gem_object_unreference(&obj->base);
184 : out:
185 0 : return ret;
186 0 : }
187 :
188 0 : static int intelfb_create(struct drm_fb_helper *helper,
189 : struct drm_fb_helper_surface_size *sizes)
190 : {
191 : struct intel_fbdev *ifbdev =
192 0 : container_of(helper, struct intel_fbdev, helper);
193 0 : struct intel_framebuffer *intel_fb = ifbdev->fb;
194 0 : struct drm_device *dev = helper->dev;
195 0 : struct drm_i915_private *dev_priv = dev->dev_private;
196 : struct fb_info *info;
197 : struct drm_framebuffer *fb;
198 : struct drm_i915_gem_object *obj;
199 : int size, ret;
200 : bool prealloc = false;
201 :
202 0 : mutex_lock(&dev->struct_mutex);
203 :
204 0 : if (intel_fb &&
205 0 : (sizes->fb_width > intel_fb->base.width ||
206 0 : sizes->fb_height > intel_fb->base.height)) {
207 : DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d),"
208 : " releasing it\n",
209 : intel_fb->base.width, intel_fb->base.height,
210 : sizes->fb_width, sizes->fb_height);
211 0 : drm_framebuffer_unreference(&intel_fb->base);
212 0 : intel_fb = ifbdev->fb = NULL;
213 0 : }
214 0 : if (!intel_fb || WARN_ON(!intel_fb->obj)) {
215 : DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n");
216 0 : ret = intelfb_alloc(helper, sizes);
217 0 : if (ret)
218 : goto out_unlock;
219 0 : intel_fb = ifbdev->fb;
220 0 : } else {
221 : DRM_DEBUG_KMS("re-using BIOS fb\n");
222 : prealloc = true;
223 : #ifdef __linux__
224 : sizes->fb_width = intel_fb->base.width;
225 : sizes->fb_height = intel_fb->base.height;
226 : #endif
227 : }
228 :
229 0 : obj = intel_fb->obj;
230 0 : size = obj->base.size;
231 :
232 0 : info = drm_fb_helper_alloc_fbi(helper);
233 0 : if (IS_ERR(info)) {
234 0 : ret = PTR_ERR(info);
235 0 : goto out_unpin;
236 : }
237 :
238 0 : info->par = helper;
239 :
240 0 : fb = &ifbdev->fb->base;
241 :
242 0 : ifbdev->helper.fb = fb;
243 :
244 : #ifdef __linux__
245 : strcpy(info->fix.id, "inteldrmfb");
246 :
247 : info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
248 : info->fbops = &intelfb_ops;
249 :
250 : /* setup aperture base/size for vesafb takeover */
251 : info->apertures->ranges[0].base = dev->mode_config.fb_base;
252 : info->apertures->ranges[0].size = dev_priv->gtt.mappable_end;
253 :
254 : info->fix.smem_start = dev->mode_config.fb_base + i915_gem_obj_ggtt_offset(obj);
255 : info->fix.smem_len = size;
256 :
257 : info->screen_base =
258 : ioremap_wc(dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj),
259 : size);
260 : if (!info->screen_base) {
261 : ret = -ENOSPC;
262 : goto out_destroy_fbi;
263 : }
264 : info->screen_size = size;
265 :
266 : /* This driver doesn't need a VT switch to restore the mode on resume */
267 : info->skip_vt_switch = true;
268 :
269 : drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
270 : drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
271 :
272 : /* If the object is shmemfs backed, it will have given us zeroed pages.
273 : * If the object is stolen however, it will be full of whatever
274 : * garbage was left in there.
275 : */
276 : if (ifbdev->fb->obj->stolen && !prealloc)
277 : memset_io(info->screen_base, 0, info->screen_size);
278 :
279 : /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
280 : #else
281 : {
282 0 : struct rasops_info *ri = &dev_priv->ro;
283 0 : bus_space_handle_t bsh;
284 : int err;
285 :
286 0 : err = agp_map_subregion(dev_priv->agph,
287 0 : i915_gem_obj_ggtt_offset(obj), size, &bsh);
288 0 : if (err) {
289 0 : ret = -err;
290 0 : goto out_unpin;
291 : }
292 :
293 0 : ri->ri_bits = bus_space_vaddr(dev->bst, bsh);
294 0 : ri->ri_depth = fb->bits_per_pixel;
295 0 : ri->ri_stride = fb->pitches[0];
296 0 : ri->ri_width = sizes->fb_width;
297 0 : ri->ri_height = sizes->fb_height;
298 :
299 0 : switch (fb->pixel_format) {
300 : case DRM_FORMAT_XRGB8888:
301 0 : ri->ri_rnum = 8;
302 0 : ri->ri_rpos = 16;
303 0 : ri->ri_gnum = 8;
304 0 : ri->ri_gpos = 8;
305 0 : ri->ri_bnum = 8;
306 0 : ri->ri_bpos = 0;
307 0 : break;
308 : case DRM_FORMAT_RGB565:
309 0 : ri->ri_rnum = 5;
310 0 : ri->ri_rpos = 11;
311 0 : ri->ri_gnum = 6;
312 0 : ri->ri_gpos = 5;
313 0 : ri->ri_bnum = 5;
314 0 : ri->ri_bpos = 0;
315 0 : break;
316 : }
317 :
318 0 : memset(ri->ri_bits, 0, size);
319 0 : }
320 : #endif
321 :
322 : DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08llx, bo %p\n",
323 : fb->width, fb->height,
324 : i915_gem_obj_ggtt_offset(obj), obj);
325 :
326 0 : mutex_unlock(&dev->struct_mutex);
327 : #ifdef __linux__
328 : vga_switcheroo_client_fb_set(dev->pdev, info);
329 : #endif
330 0 : return 0;
331 :
332 : #ifdef __linux__
333 : out_destroy_fbi:
334 : drm_fb_helper_release_fbi(helper);
335 : #endif
336 : out_unpin:
337 0 : i915_gem_object_ggtt_unpin(obj);
338 0 : drm_gem_object_unreference(&obj->base);
339 : out_unlock:
340 0 : mutex_unlock(&dev->struct_mutex);
341 0 : return ret;
342 0 : }
343 :
344 : /** Sets the color ramps on behalf of RandR */
345 0 : static void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
346 : u16 blue, int regno)
347 : {
348 0 : struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
349 :
350 0 : intel_crtc->lut_r[regno] = red >> 8;
351 0 : intel_crtc->lut_g[regno] = green >> 8;
352 0 : intel_crtc->lut_b[regno] = blue >> 8;
353 0 : }
354 :
355 0 : static void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
356 : u16 *blue, int regno)
357 : {
358 0 : struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
359 :
360 0 : *red = intel_crtc->lut_r[regno] << 8;
361 0 : *green = intel_crtc->lut_g[regno] << 8;
362 0 : *blue = intel_crtc->lut_b[regno] << 8;
363 0 : }
364 :
365 : static struct drm_fb_helper_crtc *
366 0 : intel_fb_helper_crtc(struct drm_fb_helper *fb_helper, struct drm_crtc *crtc)
367 : {
368 : int i;
369 :
370 0 : for (i = 0; i < fb_helper->crtc_count; i++)
371 0 : if (fb_helper->crtc_info[i].mode_set.crtc == crtc)
372 0 : return &fb_helper->crtc_info[i];
373 :
374 0 : return NULL;
375 0 : }
376 :
377 : /*
378 : * Try to read the BIOS display configuration and use it for the initial
379 : * fb configuration.
380 : *
381 : * The BIOS or boot loader will generally create an initial display
382 : * configuration for us that includes some set of active pipes and displays.
383 : * This routine tries to figure out which pipes and connectors are active
384 : * and stuffs them into the crtcs and modes array given to us by the
385 : * drm_fb_helper code.
386 : *
387 : * The overall sequence is:
388 : * intel_fbdev_init - from driver load
389 : * intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data
390 : * drm_fb_helper_init - build fb helper structs
391 : * drm_fb_helper_single_add_all_connectors - more fb helper structs
392 : * intel_fbdev_initial_config - apply the config
393 : * drm_fb_helper_initial_config - call ->probe then register_framebuffer()
394 : * drm_setup_crtcs - build crtc config for fbdev
395 : * intel_fb_initial_config - find active connectors etc
396 : * drm_fb_helper_single_fb_probe - set up fbdev
397 : * intelfb_create - re-use or alloc fb, build out fbdev structs
398 : *
399 : * Note that we don't make special consideration whether we could actually
400 : * switch to the selected modes without a full modeset. E.g. when the display
401 : * is in VGA mode we need to recalculate watermarks and set a new high-res
402 : * framebuffer anyway.
403 : */
404 0 : static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper,
405 : struct drm_fb_helper_crtc **crtcs,
406 : struct drm_display_mode **modes,
407 : struct drm_fb_offset *offsets,
408 : bool *enabled, int width, int height)
409 : {
410 0 : struct drm_device *dev = fb_helper->dev;
411 : int i, j;
412 : bool *save_enabled;
413 : bool fallback = true;
414 : int num_connectors_enabled = 0;
415 : int num_connectors_detected = 0;
416 : uint64_t conn_configured = 0, mask;
417 : int pass = 0;
418 :
419 0 : save_enabled = kcalloc(fb_helper->connector_count, sizeof(bool),
420 : GFP_KERNEL);
421 0 : if (!save_enabled)
422 0 : return false;
423 :
424 0 : memcpy(save_enabled, enabled, fb_helper->connector_count);
425 0 : mask = (1 << fb_helper->connector_count) - 1;
426 : retry:
427 0 : for (i = 0; i < fb_helper->connector_count; i++) {
428 : struct drm_fb_helper_connector *fb_conn;
429 : struct drm_connector *connector;
430 : struct drm_encoder *encoder;
431 : struct drm_fb_helper_crtc *new_crtc;
432 :
433 0 : fb_conn = fb_helper->connector_info[i];
434 0 : connector = fb_conn->connector;
435 :
436 0 : if (conn_configured & (1 << i))
437 0 : continue;
438 :
439 0 : if (pass == 0 && !connector->has_tile)
440 0 : continue;
441 :
442 0 : if (connector->status == connector_status_connected)
443 0 : num_connectors_detected++;
444 :
445 0 : if (!enabled[i]) {
446 : DRM_DEBUG_KMS("connector %s not enabled, skipping\n",
447 : connector->name);
448 0 : conn_configured |= (1 << i);
449 0 : continue;
450 : }
451 :
452 0 : if (connector->force == DRM_FORCE_OFF) {
453 : DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n",
454 : connector->name);
455 0 : enabled[i] = false;
456 0 : continue;
457 : }
458 :
459 0 : encoder = connector->encoder;
460 0 : if (!encoder || WARN_ON(!encoder->crtc)) {
461 0 : if (connector->force > DRM_FORCE_OFF)
462 0 : goto bail;
463 :
464 : DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n",
465 : connector->name);
466 0 : enabled[i] = false;
467 0 : conn_configured |= (1 << i);
468 0 : continue;
469 : }
470 :
471 0 : num_connectors_enabled++;
472 :
473 0 : new_crtc = intel_fb_helper_crtc(fb_helper, encoder->crtc);
474 :
475 : /*
476 : * Make sure we're not trying to drive multiple connectors
477 : * with a single CRTC, since our cloning support may not
478 : * match the BIOS.
479 : */
480 0 : for (j = 0; j < fb_helper->connector_count; j++) {
481 0 : if (crtcs[j] == new_crtc) {
482 : DRM_DEBUG_KMS("fallback: cloned configuration\n");
483 0 : goto bail;
484 : }
485 : }
486 :
487 : DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n",
488 : connector->name);
489 :
490 : /* go for command line mode first */
491 0 : modes[i] = drm_pick_cmdline_mode(fb_conn, width, height);
492 :
493 : /* try for preferred next */
494 0 : if (!modes[i]) {
495 : DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n",
496 : connector->name, connector->has_tile);
497 0 : modes[i] = drm_has_preferred_mode(fb_conn, width,
498 : height);
499 0 : }
500 :
501 : /* No preferred mode marked by the EDID? Are there any modes? */
502 0 : if (!modes[i] && !list_empty(&connector->modes)) {
503 : DRM_DEBUG_KMS("using first mode listed on connector %s\n",
504 : connector->name);
505 0 : modes[i] = list_first_entry(&connector->modes,
506 : struct drm_display_mode,
507 : head);
508 0 : }
509 :
510 : /* last resort: use current mode */
511 0 : if (!modes[i]) {
512 : /*
513 : * IMPORTANT: We want to use the adjusted mode (i.e.
514 : * after the panel fitter upscaling) as the initial
515 : * config, not the input mode, which is what crtc->mode
516 : * usually contains. But since our current
517 : * code puts a mode derived from the post-pfit timings
518 : * into crtc->mode this works out correctly.
519 : */
520 : DRM_DEBUG_KMS("looking for current mode on connector %s\n",
521 : connector->name);
522 0 : modes[i] = &encoder->crtc->mode;
523 0 : }
524 0 : crtcs[i] = new_crtc;
525 :
526 : DRM_DEBUG_KMS("connector %s on pipe %c [CRTC:%d]: %dx%d%s\n",
527 : connector->name,
528 : pipe_name(to_intel_crtc(encoder->crtc)->pipe),
529 : encoder->crtc->base.id,
530 : modes[i]->hdisplay, modes[i]->vdisplay,
531 : modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :"");
532 :
533 : fallback = false;
534 0 : conn_configured |= (1 << i);
535 0 : }
536 :
537 0 : if ((conn_configured & mask) != mask) {
538 0 : pass++;
539 0 : goto retry;
540 : }
541 :
542 : /*
543 : * If the BIOS didn't enable everything it could, fall back to have the
544 : * same user experiencing of lighting up as much as possible like the
545 : * fbdev helper library.
546 : */
547 0 : if (num_connectors_enabled != num_connectors_detected &&
548 0 : num_connectors_enabled < INTEL_INFO(dev)->num_pipes) {
549 : DRM_DEBUG_KMS("fallback: Not all outputs enabled\n");
550 : DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled,
551 : num_connectors_detected);
552 : fallback = true;
553 0 : }
554 :
555 0 : if (fallback) {
556 : bail:
557 : DRM_DEBUG_KMS("Not using firmware configuration\n");
558 0 : memcpy(enabled, save_enabled, fb_helper->connector_count);
559 0 : kfree(save_enabled);
560 0 : return false;
561 : }
562 :
563 0 : kfree(save_enabled);
564 0 : return true;
565 0 : }
566 :
567 : static const struct drm_fb_helper_funcs intel_fb_helper_funcs = {
568 : .initial_config = intel_fb_initial_config,
569 : .gamma_set = intel_crtc_fb_gamma_set,
570 : .gamma_get = intel_crtc_fb_gamma_get,
571 : .fb_probe = intelfb_create,
572 : };
573 :
574 : #ifdef notyet
575 :
576 : static void intel_fbdev_destroy(struct drm_device *dev,
577 : struct intel_fbdev *ifbdev)
578 : {
579 :
580 : drm_fb_helper_unregister_fbi(&ifbdev->helper);
581 : drm_fb_helper_release_fbi(&ifbdev->helper);
582 :
583 : drm_fb_helper_fini(&ifbdev->helper);
584 :
585 : drm_framebuffer_unregister_private(&ifbdev->fb->base);
586 : drm_framebuffer_remove(&ifbdev->fb->base);
587 : }
588 :
589 : #endif
590 :
591 : /*
592 : * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible.
593 : * The core display code will have read out the current plane configuration,
594 : * so we use that to figure out if there's an object for us to use as the
595 : * fb, and if so, we re-use it for the fbdev configuration.
596 : *
597 : * Note we only support a single fb shared across pipes for boot (mostly for
598 : * fbcon), so we just find the biggest and use that.
599 : */
600 0 : static bool intel_fbdev_init_bios(struct drm_device *dev,
601 : struct intel_fbdev *ifbdev)
602 : {
603 : struct intel_framebuffer *fb = NULL;
604 : struct drm_crtc *crtc;
605 : struct intel_crtc *intel_crtc;
606 : unsigned int max_size = 0;
607 :
608 : /* Find the largest fb */
609 0 : for_each_crtc(dev, crtc) {
610 : struct drm_i915_gem_object *obj =
611 0 : intel_fb_obj(crtc->primary->state->fb);
612 0 : intel_crtc = to_intel_crtc(crtc);
613 :
614 0 : if (!crtc->state->active || !obj) {
615 : DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n",
616 : pipe_name(intel_crtc->pipe));
617 0 : continue;
618 : }
619 :
620 0 : if (obj->base.size > max_size) {
621 : DRM_DEBUG_KMS("found possible fb from plane %c\n",
622 : pipe_name(intel_crtc->pipe));
623 0 : fb = to_intel_framebuffer(crtc->primary->state->fb);
624 0 : max_size = obj->base.size;
625 0 : }
626 0 : }
627 :
628 0 : if (!fb) {
629 : DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n");
630 : goto out;
631 : }
632 :
633 : /* Now make sure all the pipes will fit into it */
634 0 : for_each_crtc(dev, crtc) {
635 : unsigned int cur_size;
636 :
637 0 : intel_crtc = to_intel_crtc(crtc);
638 :
639 0 : if (!crtc->state->active) {
640 : DRM_DEBUG_KMS("pipe %c not active, skipping\n",
641 : pipe_name(intel_crtc->pipe));
642 0 : continue;
643 : }
644 :
645 : DRM_DEBUG_KMS("checking plane %c for BIOS fb\n",
646 : pipe_name(intel_crtc->pipe));
647 :
648 : /*
649 : * See if the plane fb we found above will fit on this
650 : * pipe. Note we need to use the selected fb's pitch and bpp
651 : * rather than the current pipe's, since they differ.
652 : */
653 0 : cur_size = intel_crtc->config->base.adjusted_mode.crtc_hdisplay;
654 0 : cur_size = cur_size * fb->base.bits_per_pixel / 8;
655 0 : if (fb->base.pitches[0] < cur_size) {
656 : DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n",
657 : pipe_name(intel_crtc->pipe),
658 : cur_size, fb->base.pitches[0]);
659 : fb = NULL;
660 0 : break;
661 : }
662 :
663 0 : cur_size = intel_crtc->config->base.adjusted_mode.crtc_vdisplay;
664 0 : cur_size = intel_fb_align_height(dev, cur_size,
665 0 : fb->base.pixel_format,
666 0 : fb->base.modifier[0]);
667 0 : cur_size *= fb->base.pitches[0];
668 : DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n",
669 : pipe_name(intel_crtc->pipe),
670 : intel_crtc->config->base.adjusted_mode.crtc_hdisplay,
671 : intel_crtc->config->base.adjusted_mode.crtc_vdisplay,
672 : fb->base.bits_per_pixel,
673 : cur_size);
674 :
675 0 : if (cur_size > max_size) {
676 : DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n",
677 : pipe_name(intel_crtc->pipe),
678 : cur_size, max_size);
679 : fb = NULL;
680 0 : break;
681 : }
682 :
683 : DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n",
684 : pipe_name(intel_crtc->pipe),
685 : max_size, cur_size);
686 0 : }
687 :
688 0 : if (!fb) {
689 : DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n");
690 : goto out;
691 : }
692 :
693 0 : ifbdev->preferred_bpp = fb->base.bits_per_pixel;
694 0 : ifbdev->fb = fb;
695 :
696 0 : drm_framebuffer_reference(&ifbdev->fb->base);
697 :
698 : /* Final pass to check if any active pipes don't have fbs */
699 0 : for_each_crtc(dev, crtc) {
700 0 : intel_crtc = to_intel_crtc(crtc);
701 :
702 0 : if (!crtc->state->active)
703 : continue;
704 :
705 0 : WARN(!crtc->primary->fb,
706 : "re-used BIOS config but lost an fb on crtc %d\n",
707 : crtc->base.id);
708 0 : }
709 :
710 :
711 : DRM_DEBUG_KMS("using BIOS fb for initial console\n");
712 0 : return true;
713 :
714 : out:
715 :
716 0 : return false;
717 0 : }
718 :
719 : #ifdef notyet
720 : static void intel_fbdev_suspend_worker(struct work_struct *work)
721 : {
722 : intel_fbdev_set_suspend(container_of(work,
723 : struct drm_i915_private,
724 : fbdev_suspend_work)->dev,
725 : FBINFO_STATE_RUNNING,
726 : true);
727 : }
728 : #endif
729 :
730 0 : int intel_fbdev_init(struct drm_device *dev)
731 : {
732 : struct intel_fbdev *ifbdev;
733 0 : struct drm_i915_private *dev_priv = dev->dev_private;
734 : int ret;
735 :
736 0 : if (WARN_ON(INTEL_INFO(dev)->num_pipes == 0))
737 0 : return -ENODEV;
738 :
739 0 : ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
740 0 : if (ifbdev == NULL)
741 0 : return -ENOMEM;
742 :
743 0 : drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs);
744 :
745 0 : if (!intel_fbdev_init_bios(dev, ifbdev))
746 0 : ifbdev->preferred_bpp = 32;
747 :
748 0 : ret = drm_fb_helper_init(dev, &ifbdev->helper,
749 0 : INTEL_INFO(dev)->num_pipes, 4);
750 0 : if (ret) {
751 0 : kfree(ifbdev);
752 0 : return ret;
753 : }
754 :
755 0 : ifbdev->helper.atomic = true;
756 :
757 0 : dev_priv->fbdev = ifbdev;
758 : #ifdef notyet
759 : INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker);
760 : #endif
761 :
762 0 : drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
763 :
764 0 : return 0;
765 0 : }
766 :
767 0 : void intel_fbdev_initial_config(void *data, async_cookie_t cookie)
768 : {
769 0 : struct drm_i915_private *dev_priv = data;
770 0 : struct intel_fbdev *ifbdev = dev_priv->fbdev;
771 :
772 : /* Due to peculiar init order wrt to hpd handling this is separate. */
773 0 : drm_fb_helper_initial_config(&ifbdev->helper, ifbdev->preferred_bpp);
774 0 : }
775 :
776 : #ifdef __linux__
777 : void intel_fbdev_fini(struct drm_device *dev)
778 : {
779 : struct drm_i915_private *dev_priv = dev->dev_private;
780 : if (!dev_priv->fbdev)
781 : return;
782 :
783 : flush_work(&dev_priv->fbdev_suspend_work);
784 :
785 : async_synchronize_full();
786 : intel_fbdev_destroy(dev, dev_priv->fbdev);
787 : kfree(dev_priv->fbdev);
788 : dev_priv->fbdev = NULL;
789 : }
790 :
791 : void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous)
792 : {
793 : struct drm_i915_private *dev_priv = dev->dev_private;
794 : struct intel_fbdev *ifbdev = dev_priv->fbdev;
795 : struct fb_info *info;
796 :
797 : if (!ifbdev)
798 : return;
799 :
800 : info = ifbdev->helper.fbdev;
801 :
802 : if (synchronous) {
803 : /* Flush any pending work to turn the console on, and then
804 : * wait to turn it off. It must be synchronous as we are
805 : * about to suspend or unload the driver.
806 : *
807 : * Note that from within the work-handler, we cannot flush
808 : * ourselves, so only flush outstanding work upon suspend!
809 : */
810 : if (state != FBINFO_STATE_RUNNING)
811 : flush_work(&dev_priv->fbdev_suspend_work);
812 : console_lock();
813 : } else {
814 : /*
815 : * The console lock can be pretty contented on resume due
816 : * to all the printk activity. Try to keep it out of the hot
817 : * path of resume if possible.
818 : */
819 : WARN_ON(state != FBINFO_STATE_RUNNING);
820 : if (!console_trylock()) {
821 : /* Don't block our own workqueue as this can
822 : * be run in parallel with other i915.ko tasks.
823 : */
824 : schedule_work(&dev_priv->fbdev_suspend_work);
825 : return;
826 : }
827 : }
828 :
829 : /* On resume from hibernation: If the object is shmemfs backed, it has
830 : * been restored from swap. If the object is stolen however, it will be
831 : * full of whatever garbage was left in there.
832 : */
833 : if (state == FBINFO_STATE_RUNNING && ifbdev->fb->obj->stolen)
834 : memset_io(info->screen_base, 0, info->screen_size);
835 :
836 : drm_fb_helper_set_suspend(&ifbdev->helper, state);
837 : console_unlock();
838 : }
839 : #endif
840 :
841 0 : void intel_fbdev_output_poll_changed(struct drm_device *dev)
842 : {
843 0 : struct drm_i915_private *dev_priv = dev->dev_private;
844 0 : if (dev_priv->fbdev)
845 0 : drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
846 0 : }
847 :
848 0 : void intel_fbdev_restore_mode(struct drm_device *dev)
849 : {
850 : int ret;
851 0 : struct drm_i915_private *dev_priv = dev->dev_private;
852 0 : struct intel_fbdev *ifbdev = dev_priv->fbdev;
853 : struct drm_fb_helper *fb_helper;
854 :
855 0 : if (!ifbdev)
856 0 : return;
857 :
858 0 : fb_helper = &ifbdev->helper;
859 :
860 0 : ret = drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper);
861 0 : if (ret) {
862 : DRM_DEBUG("failed to restore crtc mode\n");
863 : } else {
864 0 : mutex_lock(&fb_helper->dev->struct_mutex);
865 0 : intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT);
866 0 : mutex_unlock(&fb_helper->dev->struct_mutex);
867 : }
868 0 : }
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