2 * Copyright © 2007 David Airlie
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:
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
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.
27 #include <linux/async.h>
28 #include <linux/module.h>
29 #include <linux/kernel.h>
30 #include <linux/console.h>
31 #include <linux/errno.h>
32 #include <linux/string.h>
34 #include <linux/tty.h>
35 #include <linux/sysrq.h>
36 #include <linux/delay.h>
38 #include <linux/init.h>
39 #include <linux/vga_switcheroo.h>
42 #include <drm/drm_crtc.h>
43 #include <drm/drm_fb_helper.h>
44 #include "intel_drv.h"
45 #include <drm/i915_drm.h>
48 static int intel_fbdev_set_par(struct fb_info *info)
50 struct drm_fb_helper *fb_helper = info->par;
51 struct intel_fbdev *ifbdev =
52 container_of(fb_helper, struct intel_fbdev, helper);
55 ret = drm_fb_helper_set_par(info);
59 * FIXME: fbdev presumes that all callbacks also work from
60 * atomic contexts and relies on that for emergency oops
61 * printing. KMS totally doesn't do that and the locking here is
62 * by far not the only place this goes wrong. Ignore this for
63 * now until we solve this for real.
65 mutex_lock(&fb_helper->dev->struct_mutex);
66 ret = i915_gem_object_set_to_gtt_domain(ifbdev->fb->obj,
68 mutex_unlock(&fb_helper->dev->struct_mutex);
74 static struct fb_ops intelfb_ops = {
76 .fb_check_var = drm_fb_helper_check_var,
77 .fb_set_par = intel_fbdev_set_par,
78 .fb_fillrect = cfb_fillrect,
79 .fb_copyarea = cfb_copyarea,
80 .fb_imageblit = cfb_imageblit,
81 .fb_pan_display = drm_fb_helper_pan_display,
82 .fb_blank = drm_fb_helper_blank,
83 .fb_setcmap = drm_fb_helper_setcmap,
84 .fb_debug_enter = drm_fb_helper_debug_enter,
85 .fb_debug_leave = drm_fb_helper_debug_leave,
88 static int intelfb_alloc(struct drm_fb_helper *helper,
89 struct drm_fb_helper_surface_size *sizes)
91 struct intel_fbdev *ifbdev =
92 container_of(helper, struct intel_fbdev, helper);
93 struct drm_framebuffer *fb;
94 struct drm_device *dev = helper->dev;
95 struct drm_mode_fb_cmd2 mode_cmd = {};
96 struct drm_i915_gem_object *obj;
99 /* we don't do packed 24bpp */
100 if (sizes->surface_bpp == 24)
101 sizes->surface_bpp = 32;
103 mode_cmd.width = sizes->surface_width;
104 mode_cmd.height = sizes->surface_height;
106 mode_cmd.pitches[0] = ALIGN(mode_cmd.width *
107 DIV_ROUND_UP(sizes->surface_bpp, 8), 64);
108 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
109 sizes->surface_depth);
111 size = mode_cmd.pitches[0] * mode_cmd.height;
112 size = PAGE_ALIGN(size);
113 obj = i915_gem_object_create_stolen(dev, size);
115 obj = i915_gem_alloc_object(dev, size);
117 DRM_ERROR("failed to allocate framebuffer\n");
122 /* Flush everything out, we'll be doing GTT only from now on */
123 ret = intel_pin_and_fence_fb_obj(dev, obj, NULL);
125 DRM_ERROR("failed to pin obj: %d\n", ret);
129 fb = __intel_framebuffer_create(dev, &mode_cmd, obj);
135 ifbdev->fb = to_intel_framebuffer(fb);
140 i915_gem_object_ggtt_unpin(obj);
142 drm_gem_object_unreference(&obj->base);
147 static int intelfb_create(struct drm_fb_helper *helper,
148 struct drm_fb_helper_surface_size *sizes)
150 struct intel_fbdev *ifbdev =
151 container_of(helper, struct intel_fbdev, helper);
152 struct intel_framebuffer *intel_fb = ifbdev->fb;
153 struct drm_device *dev = helper->dev;
154 struct drm_i915_private *dev_priv = dev->dev_private;
155 struct fb_info *info;
156 struct drm_framebuffer *fb;
157 struct drm_i915_gem_object *obj;
159 bool prealloc = false;
161 mutex_lock(&dev->struct_mutex);
164 (sizes->fb_width > intel_fb->base.width ||
165 sizes->fb_height > intel_fb->base.height)) {
166 DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d),"
168 intel_fb->base.width, intel_fb->base.height,
169 sizes->fb_width, sizes->fb_height);
170 drm_framebuffer_unreference(&intel_fb->base);
171 intel_fb = ifbdev->fb = NULL;
173 if (!intel_fb || WARN_ON(!intel_fb->obj)) {
174 DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n");
175 ret = intelfb_alloc(helper, sizes);
178 intel_fb = ifbdev->fb;
180 DRM_DEBUG_KMS("re-using BIOS fb\n");
182 sizes->fb_width = intel_fb->base.width;
183 sizes->fb_height = intel_fb->base.height;
187 size = obj->base.size;
189 info = framebuffer_alloc(0, &dev->pdev->dev);
197 fb = &ifbdev->fb->base;
199 ifbdev->helper.fb = fb;
200 ifbdev->helper.fbdev = info;
202 strcpy(info->fix.id, "inteldrmfb");
204 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
205 info->fbops = &intelfb_ops;
207 ret = fb_alloc_cmap(&info->cmap, 256, 0);
212 /* setup aperture base/size for vesafb takeover */
213 info->apertures = alloc_apertures(1);
214 if (!info->apertures) {
218 info->apertures->ranges[0].base = dev->mode_config.fb_base;
219 info->apertures->ranges[0].size = dev_priv->gtt.mappable_end;
221 info->fix.smem_start = dev->mode_config.fb_base + i915_gem_obj_ggtt_offset(obj);
222 info->fix.smem_len = size;
225 ioremap_wc(dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj),
227 if (!info->screen_base) {
231 info->screen_size = size;
233 /* This driver doesn't need a VT switch to restore the mode on resume */
234 info->skip_vt_switch = true;
236 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
237 drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
239 /* If the object is shmemfs backed, it will have given us zeroed pages.
240 * If the object is stolen however, it will be full of whatever
241 * garbage was left in there.
243 if (ifbdev->fb->obj->stolen && !prealloc)
244 memset_io(info->screen_base, 0, info->screen_size);
246 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
248 DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08lx, bo %p\n",
249 fb->width, fb->height,
250 i915_gem_obj_ggtt_offset(obj), obj);
252 mutex_unlock(&dev->struct_mutex);
253 vga_switcheroo_client_fb_set(dev->pdev, info);
257 i915_gem_object_ggtt_unpin(obj);
258 drm_gem_object_unreference(&obj->base);
260 mutex_unlock(&dev->struct_mutex);
264 /** Sets the color ramps on behalf of RandR */
265 static void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
268 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
270 intel_crtc->lut_r[regno] = red >> 8;
271 intel_crtc->lut_g[regno] = green >> 8;
272 intel_crtc->lut_b[regno] = blue >> 8;
275 static void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
276 u16 *blue, int regno)
278 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
280 *red = intel_crtc->lut_r[regno] << 8;
281 *green = intel_crtc->lut_g[regno] << 8;
282 *blue = intel_crtc->lut_b[regno] << 8;
285 static struct drm_fb_helper_crtc *
286 intel_fb_helper_crtc(struct drm_fb_helper *fb_helper, struct drm_crtc *crtc)
290 for (i = 0; i < fb_helper->crtc_count; i++)
291 if (fb_helper->crtc_info[i].mode_set.crtc == crtc)
292 return &fb_helper->crtc_info[i];
298 * Try to read the BIOS display configuration and use it for the initial
301 * The BIOS or boot loader will generally create an initial display
302 * configuration for us that includes some set of active pipes and displays.
303 * This routine tries to figure out which pipes and connectors are active
304 * and stuffs them into the crtcs and modes array given to us by the
305 * drm_fb_helper code.
307 * The overall sequence is:
308 * intel_fbdev_init - from driver load
309 * intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data
310 * drm_fb_helper_init - build fb helper structs
311 * drm_fb_helper_single_add_all_connectors - more fb helper structs
312 * intel_fbdev_initial_config - apply the config
313 * drm_fb_helper_initial_config - call ->probe then register_framebuffer()
314 * drm_setup_crtcs - build crtc config for fbdev
315 * intel_fb_initial_config - find active connectors etc
316 * drm_fb_helper_single_fb_probe - set up fbdev
317 * intelfb_create - re-use or alloc fb, build out fbdev structs
319 * Note that we don't make special consideration whether we could actually
320 * switch to the selected modes without a full modeset. E.g. when the display
321 * is in VGA mode we need to recalculate watermarks and set a new high-res
322 * framebuffer anyway.
324 static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper,
325 struct drm_fb_helper_crtc **crtcs,
326 struct drm_display_mode **modes,
327 bool *enabled, int width, int height)
329 struct drm_device *dev = fb_helper->dev;
332 bool fallback = true;
333 int num_connectors_enabled = 0;
334 int num_connectors_detected = 0;
336 save_enabled = kcalloc(dev->mode_config.num_connector, sizeof(bool),
341 memcpy(save_enabled, enabled, dev->mode_config.num_connector);
343 for (i = 0; i < fb_helper->connector_count; i++) {
344 struct drm_fb_helper_connector *fb_conn;
345 struct drm_connector *connector;
346 struct drm_encoder *encoder;
347 struct drm_fb_helper_crtc *new_crtc;
349 fb_conn = fb_helper->connector_info[i];
350 connector = fb_conn->connector;
352 if (connector->status == connector_status_connected)
353 num_connectors_detected++;
356 DRM_DEBUG_KMS("connector %s not enabled, skipping\n",
361 if (connector->force == DRM_FORCE_OFF) {
362 DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n",
368 encoder = connector->encoder;
369 if (!encoder || WARN_ON(!encoder->crtc)) {
370 if (connector->force > DRM_FORCE_OFF)
373 DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n",
379 num_connectors_enabled++;
381 new_crtc = intel_fb_helper_crtc(fb_helper, encoder->crtc);
384 * Make sure we're not trying to drive multiple connectors
385 * with a single CRTC, since our cloning support may not
388 for (j = 0; j < fb_helper->connector_count; j++) {
389 if (crtcs[j] == new_crtc) {
390 DRM_DEBUG_KMS("fallback: cloned configuration\n");
395 DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n",
398 /* go for command line mode first */
399 modes[i] = drm_pick_cmdline_mode(fb_conn, width, height);
401 /* try for preferred next */
403 DRM_DEBUG_KMS("looking for preferred mode on connector %s\n",
405 modes[i] = drm_has_preferred_mode(fb_conn, width,
409 /* No preferred mode marked by the EDID? Are there any modes? */
410 if (!modes[i] && !list_empty(&connector->modes)) {
411 DRM_DEBUG_KMS("using first mode listed on connector %s\n",
413 modes[i] = list_first_entry(&connector->modes,
414 struct drm_display_mode,
418 /* last resort: use current mode */
421 * IMPORTANT: We want to use the adjusted mode (i.e.
422 * after the panel fitter upscaling) as the initial
423 * config, not the input mode, which is what crtc->mode
424 * usually contains. But since our current fastboot
425 * code puts a mode derived from the post-pfit timings
426 * into crtc->mode this works out correctly. We don't
427 * use hwmode anywhere right now, so use it for this
428 * since the fb helper layer wants a pointer to
431 DRM_DEBUG_KMS("looking for current mode on connector %s\n",
433 intel_mode_from_pipe_config(&encoder->crtc->hwmode,
434 &to_intel_crtc(encoder->crtc)->config);
435 modes[i] = &encoder->crtc->hwmode;
439 DRM_DEBUG_KMS("connector %s on pipe %c [CRTC:%d]: %dx%d%s\n",
441 pipe_name(to_intel_crtc(encoder->crtc)->pipe),
442 encoder->crtc->base.id,
443 modes[i]->hdisplay, modes[i]->vdisplay,
444 modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :"");
450 * If the BIOS didn't enable everything it could, fall back to have the
451 * same user experiencing of lighting up as much as possible like the
452 * fbdev helper library.
454 if (num_connectors_enabled != num_connectors_detected &&
455 num_connectors_enabled < INTEL_INFO(dev)->num_pipes) {
456 DRM_DEBUG_KMS("fallback: Not all outputs enabled\n");
457 DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled,
458 num_connectors_detected);
464 DRM_DEBUG_KMS("Not using firmware configuration\n");
465 memcpy(enabled, save_enabled, dev->mode_config.num_connector);
474 static const struct drm_fb_helper_funcs intel_fb_helper_funcs = {
475 .initial_config = intel_fb_initial_config,
476 .gamma_set = intel_crtc_fb_gamma_set,
477 .gamma_get = intel_crtc_fb_gamma_get,
478 .fb_probe = intelfb_create,
481 static void intel_fbdev_destroy(struct drm_device *dev,
482 struct intel_fbdev *ifbdev)
484 if (ifbdev->helper.fbdev) {
485 struct fb_info *info = ifbdev->helper.fbdev;
487 unregister_framebuffer(info);
488 iounmap(info->screen_base);
490 fb_dealloc_cmap(&info->cmap);
492 framebuffer_release(info);
495 drm_fb_helper_fini(&ifbdev->helper);
497 drm_framebuffer_unregister_private(&ifbdev->fb->base);
498 drm_framebuffer_remove(&ifbdev->fb->base);
502 * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible.
503 * The core display code will have read out the current plane configuration,
504 * so we use that to figure out if there's an object for us to use as the
505 * fb, and if so, we re-use it for the fbdev configuration.
507 * Note we only support a single fb shared across pipes for boot (mostly for
508 * fbcon), so we just find the biggest and use that.
510 static bool intel_fbdev_init_bios(struct drm_device *dev,
511 struct intel_fbdev *ifbdev)
513 struct intel_framebuffer *fb = NULL;
514 struct drm_crtc *crtc;
515 struct intel_crtc *intel_crtc;
516 struct intel_plane_config *plane_config = NULL;
517 unsigned int max_size = 0;
522 /* Find the largest fb */
523 for_each_crtc(dev, crtc) {
524 intel_crtc = to_intel_crtc(crtc);
526 if (!intel_crtc->active || !crtc->primary->fb) {
527 DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n",
528 pipe_name(intel_crtc->pipe));
532 if (intel_crtc->plane_config.size > max_size) {
533 DRM_DEBUG_KMS("found possible fb from plane %c\n",
534 pipe_name(intel_crtc->pipe));
535 plane_config = &intel_crtc->plane_config;
536 fb = to_intel_framebuffer(crtc->primary->fb);
537 max_size = plane_config->size;
542 DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n");
546 /* Now make sure all the pipes will fit into it */
547 for_each_crtc(dev, crtc) {
548 unsigned int cur_size;
550 intel_crtc = to_intel_crtc(crtc);
552 if (!intel_crtc->active) {
553 DRM_DEBUG_KMS("pipe %c not active, skipping\n",
554 pipe_name(intel_crtc->pipe));
558 DRM_DEBUG_KMS("checking plane %c for BIOS fb\n",
559 pipe_name(intel_crtc->pipe));
562 * See if the plane fb we found above will fit on this
563 * pipe. Note we need to use the selected fb's pitch and bpp
564 * rather than the current pipe's, since they differ.
566 cur_size = intel_crtc->config.adjusted_mode.crtc_hdisplay;
567 cur_size = cur_size * fb->base.bits_per_pixel / 8;
568 if (fb->base.pitches[0] < cur_size) {
569 DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n",
570 pipe_name(intel_crtc->pipe),
571 cur_size, fb->base.pitches[0]);
577 cur_size = intel_crtc->config.adjusted_mode.crtc_vdisplay;
578 cur_size = ALIGN(cur_size, plane_config->tiled ? (IS_GEN2(dev) ? 16 : 8) : 1);
579 cur_size *= fb->base.pitches[0];
580 DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n",
581 pipe_name(intel_crtc->pipe),
582 intel_crtc->config.adjusted_mode.crtc_hdisplay,
583 intel_crtc->config.adjusted_mode.crtc_vdisplay,
584 fb->base.bits_per_pixel,
587 if (cur_size > max_size) {
588 DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n",
589 pipe_name(intel_crtc->pipe),
596 DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n",
597 pipe_name(intel_crtc->pipe),
602 DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n");
606 ifbdev->preferred_bpp = fb->base.bits_per_pixel;
609 drm_framebuffer_reference(&ifbdev->fb->base);
611 /* Final pass to check if any active pipes don't have fbs */
612 for_each_crtc(dev, crtc) {
613 intel_crtc = to_intel_crtc(crtc);
615 if (!intel_crtc->active)
618 WARN(!crtc->primary->fb,
619 "re-used BIOS config but lost an fb on crtc %d\n",
624 DRM_DEBUG_KMS("using BIOS fb for initial console\n");
632 static void intel_fbdev_suspend_worker(struct work_struct *work)
634 intel_fbdev_set_suspend(container_of(work,
635 struct drm_i915_private,
636 fbdev_suspend_work)->dev,
637 FBINFO_STATE_RUNNING,
641 int intel_fbdev_init(struct drm_device *dev)
643 struct intel_fbdev *ifbdev;
644 struct drm_i915_private *dev_priv = dev->dev_private;
647 if (WARN_ON(INTEL_INFO(dev)->num_pipes == 0))
650 ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
654 drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs);
656 if (!intel_fbdev_init_bios(dev, ifbdev))
657 ifbdev->preferred_bpp = 32;
659 ret = drm_fb_helper_init(dev, &ifbdev->helper,
660 INTEL_INFO(dev)->num_pipes, 4);
666 dev_priv->fbdev = ifbdev;
667 INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker);
669 drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
674 void intel_fbdev_initial_config(void *data, async_cookie_t cookie)
676 struct drm_i915_private *dev_priv = data;
677 struct intel_fbdev *ifbdev = dev_priv->fbdev;
679 /* Due to peculiar init order wrt to hpd handling this is separate. */
680 drm_fb_helper_initial_config(&ifbdev->helper, ifbdev->preferred_bpp);
683 void intel_fbdev_fini(struct drm_device *dev)
685 struct drm_i915_private *dev_priv = dev->dev_private;
686 if (!dev_priv->fbdev)
689 flush_work(&dev_priv->fbdev_suspend_work);
691 async_synchronize_full();
692 intel_fbdev_destroy(dev, dev_priv->fbdev);
693 kfree(dev_priv->fbdev);
694 dev_priv->fbdev = NULL;
697 void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous)
699 struct drm_i915_private *dev_priv = dev->dev_private;
700 struct intel_fbdev *ifbdev = dev_priv->fbdev;
701 struct fb_info *info;
706 info = ifbdev->helper.fbdev;
709 /* Flush any pending work to turn the console on, and then
710 * wait to turn it off. It must be synchronous as we are
711 * about to suspend or unload the driver.
713 * Note that from within the work-handler, we cannot flush
714 * ourselves, so only flush outstanding work upon suspend!
716 if (state != FBINFO_STATE_RUNNING)
717 flush_work(&dev_priv->fbdev_suspend_work);
721 * The console lock can be pretty contented on resume due
722 * to all the printk activity. Try to keep it out of the hot
723 * path of resume if possible.
725 WARN_ON(state != FBINFO_STATE_RUNNING);
726 if (!console_trylock()) {
727 /* Don't block our own workqueue as this can
728 * be run in parallel with other i915.ko tasks.
730 schedule_work(&dev_priv->fbdev_suspend_work);
735 /* On resume from hibernation: If the object is shmemfs backed, it has
736 * been restored from swap. If the object is stolen however, it will be
737 * full of whatever garbage was left in there.
739 if (state == FBINFO_STATE_RUNNING && ifbdev->fb->obj->stolen)
740 memset_io(info->screen_base, 0, info->screen_size);
742 fb_set_suspend(info, state);
746 void intel_fbdev_output_poll_changed(struct drm_device *dev)
748 struct drm_i915_private *dev_priv = dev->dev_private;
750 drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
753 void intel_fbdev_restore_mode(struct drm_device *dev)
756 struct drm_i915_private *dev_priv = dev->dev_private;
758 if (!dev_priv->fbdev)
761 ret = drm_fb_helper_restore_fbdev_mode_unlocked(&dev_priv->fbdev->helper);
763 DRM_DEBUG("failed to restore crtc mode\n");