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 fb = __intel_framebuffer_create(dev, &mode_cmd, obj);
128 /* Flush everything out, we'll be doing GTT only from now on */
129 ret = intel_pin_and_fence_fb_obj(NULL, fb, NULL);
131 DRM_ERROR("failed to pin obj: %d\n", ret);
135 ifbdev->fb = to_intel_framebuffer(fb);
140 drm_framebuffer_remove(fb);
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 struct drm_fb_offset *offsets,
328 bool *enabled, int width, int height)
330 struct drm_device *dev = fb_helper->dev;
333 bool fallback = true;
334 int num_connectors_enabled = 0;
335 int num_connectors_detected = 0;
336 uint64_t conn_configured = 0, mask;
339 save_enabled = kcalloc(dev->mode_config.num_connector, sizeof(bool),
344 memcpy(save_enabled, enabled, dev->mode_config.num_connector);
345 mask = (1 << fb_helper->connector_count) - 1;
347 for (i = 0; i < fb_helper->connector_count; i++) {
348 struct drm_fb_helper_connector *fb_conn;
349 struct drm_connector *connector;
350 struct drm_encoder *encoder;
351 struct drm_fb_helper_crtc *new_crtc;
353 fb_conn = fb_helper->connector_info[i];
354 connector = fb_conn->connector;
356 if (conn_configured & (1 << i))
359 if (pass == 0 && !connector->has_tile)
362 if (connector->status == connector_status_connected)
363 num_connectors_detected++;
366 DRM_DEBUG_KMS("connector %s not enabled, skipping\n",
368 conn_configured |= (1 << i);
372 if (connector->force == DRM_FORCE_OFF) {
373 DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n",
379 encoder = connector->encoder;
380 if (!encoder || WARN_ON(!encoder->crtc)) {
381 if (connector->force > DRM_FORCE_OFF)
384 DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n",
387 conn_configured |= (1 << i);
391 num_connectors_enabled++;
393 new_crtc = intel_fb_helper_crtc(fb_helper, encoder->crtc);
396 * Make sure we're not trying to drive multiple connectors
397 * with a single CRTC, since our cloning support may not
400 for (j = 0; j < fb_helper->connector_count; j++) {
401 if (crtcs[j] == new_crtc) {
402 DRM_DEBUG_KMS("fallback: cloned configuration\n");
407 DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n",
410 /* go for command line mode first */
411 modes[i] = drm_pick_cmdline_mode(fb_conn, width, height);
413 /* try for preferred next */
415 DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n",
416 connector->name, connector->has_tile);
417 modes[i] = drm_has_preferred_mode(fb_conn, width,
421 /* No preferred mode marked by the EDID? Are there any modes? */
422 if (!modes[i] && !list_empty(&connector->modes)) {
423 DRM_DEBUG_KMS("using first mode listed on connector %s\n",
425 modes[i] = list_first_entry(&connector->modes,
426 struct drm_display_mode,
430 /* last resort: use current mode */
433 * IMPORTANT: We want to use the adjusted mode (i.e.
434 * after the panel fitter upscaling) as the initial
435 * config, not the input mode, which is what crtc->mode
436 * usually contains. But since our current fastboot
437 * code puts a mode derived from the post-pfit timings
438 * into crtc->mode this works out correctly. We don't
439 * use hwmode anywhere right now, so use it for this
440 * since the fb helper layer wants a pointer to
443 DRM_DEBUG_KMS("looking for current mode on connector %s\n",
445 intel_mode_from_pipe_config(&encoder->crtc->hwmode,
446 &to_intel_crtc(encoder->crtc)->config);
447 modes[i] = &encoder->crtc->hwmode;
451 DRM_DEBUG_KMS("connector %s on pipe %c [CRTC:%d]: %dx%d%s\n",
453 pipe_name(to_intel_crtc(encoder->crtc)->pipe),
454 encoder->crtc->base.id,
455 modes[i]->hdisplay, modes[i]->vdisplay,
456 modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :"");
459 conn_configured |= (1 << i);
462 if ((conn_configured & mask) != mask) {
468 * If the BIOS didn't enable everything it could, fall back to have the
469 * same user experiencing of lighting up as much as possible like the
470 * fbdev helper library.
472 if (num_connectors_enabled != num_connectors_detected &&
473 num_connectors_enabled < INTEL_INFO(dev)->num_pipes) {
474 DRM_DEBUG_KMS("fallback: Not all outputs enabled\n");
475 DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled,
476 num_connectors_detected);
482 DRM_DEBUG_KMS("Not using firmware configuration\n");
483 memcpy(enabled, save_enabled, dev->mode_config.num_connector);
492 static const struct drm_fb_helper_funcs intel_fb_helper_funcs = {
493 .initial_config = intel_fb_initial_config,
494 .gamma_set = intel_crtc_fb_gamma_set,
495 .gamma_get = intel_crtc_fb_gamma_get,
496 .fb_probe = intelfb_create,
499 static void intel_fbdev_destroy(struct drm_device *dev,
500 struct intel_fbdev *ifbdev)
502 if (ifbdev->helper.fbdev) {
503 struct fb_info *info = ifbdev->helper.fbdev;
505 unregister_framebuffer(info);
506 iounmap(info->screen_base);
508 fb_dealloc_cmap(&info->cmap);
510 framebuffer_release(info);
513 drm_fb_helper_fini(&ifbdev->helper);
515 drm_framebuffer_unregister_private(&ifbdev->fb->base);
516 drm_framebuffer_remove(&ifbdev->fb->base);
520 * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible.
521 * The core display code will have read out the current plane configuration,
522 * so we use that to figure out if there's an object for us to use as the
523 * fb, and if so, we re-use it for the fbdev configuration.
525 * Note we only support a single fb shared across pipes for boot (mostly for
526 * fbcon), so we just find the biggest and use that.
528 static bool intel_fbdev_init_bios(struct drm_device *dev,
529 struct intel_fbdev *ifbdev)
531 struct intel_framebuffer *fb = NULL;
532 struct drm_crtc *crtc;
533 struct intel_crtc *intel_crtc;
534 struct intel_plane_config *plane_config = NULL;
535 unsigned int max_size = 0;
540 /* Find the largest fb */
541 for_each_crtc(dev, crtc) {
542 intel_crtc = to_intel_crtc(crtc);
544 if (!intel_crtc->active || !crtc->primary->fb) {
545 DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n",
546 pipe_name(intel_crtc->pipe));
550 if (intel_crtc->plane_config.size > max_size) {
551 DRM_DEBUG_KMS("found possible fb from plane %c\n",
552 pipe_name(intel_crtc->pipe));
553 plane_config = &intel_crtc->plane_config;
554 fb = to_intel_framebuffer(crtc->primary->fb);
555 max_size = plane_config->size;
560 DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n");
564 /* Now make sure all the pipes will fit into it */
565 for_each_crtc(dev, crtc) {
566 unsigned int cur_size;
568 intel_crtc = to_intel_crtc(crtc);
570 if (!intel_crtc->active) {
571 DRM_DEBUG_KMS("pipe %c not active, skipping\n",
572 pipe_name(intel_crtc->pipe));
576 DRM_DEBUG_KMS("checking plane %c for BIOS fb\n",
577 pipe_name(intel_crtc->pipe));
580 * See if the plane fb we found above will fit on this
581 * pipe. Note we need to use the selected fb's pitch and bpp
582 * rather than the current pipe's, since they differ.
584 cur_size = intel_crtc->config.adjusted_mode.crtc_hdisplay;
585 cur_size = cur_size * fb->base.bits_per_pixel / 8;
586 if (fb->base.pitches[0] < cur_size) {
587 DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n",
588 pipe_name(intel_crtc->pipe),
589 cur_size, fb->base.pitches[0]);
595 cur_size = intel_crtc->config.adjusted_mode.crtc_vdisplay;
596 cur_size = ALIGN(cur_size, plane_config->tiled ? (IS_GEN2(dev) ? 16 : 8) : 1);
597 cur_size *= fb->base.pitches[0];
598 DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n",
599 pipe_name(intel_crtc->pipe),
600 intel_crtc->config.adjusted_mode.crtc_hdisplay,
601 intel_crtc->config.adjusted_mode.crtc_vdisplay,
602 fb->base.bits_per_pixel,
605 if (cur_size > max_size) {
606 DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n",
607 pipe_name(intel_crtc->pipe),
614 DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n",
615 pipe_name(intel_crtc->pipe),
620 DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n");
624 ifbdev->preferred_bpp = fb->base.bits_per_pixel;
627 drm_framebuffer_reference(&ifbdev->fb->base);
629 /* Final pass to check if any active pipes don't have fbs */
630 for_each_crtc(dev, crtc) {
631 intel_crtc = to_intel_crtc(crtc);
633 if (!intel_crtc->active)
636 WARN(!crtc->primary->fb,
637 "re-used BIOS config but lost an fb on crtc %d\n",
642 DRM_DEBUG_KMS("using BIOS fb for initial console\n");
650 static void intel_fbdev_suspend_worker(struct work_struct *work)
652 intel_fbdev_set_suspend(container_of(work,
653 struct drm_i915_private,
654 fbdev_suspend_work)->dev,
655 FBINFO_STATE_RUNNING,
659 int intel_fbdev_init(struct drm_device *dev)
661 struct intel_fbdev *ifbdev;
662 struct drm_i915_private *dev_priv = dev->dev_private;
665 if (WARN_ON(INTEL_INFO(dev)->num_pipes == 0))
668 ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
672 drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs);
674 if (!intel_fbdev_init_bios(dev, ifbdev))
675 ifbdev->preferred_bpp = 32;
677 ret = drm_fb_helper_init(dev, &ifbdev->helper,
678 INTEL_INFO(dev)->num_pipes, 4);
684 dev_priv->fbdev = ifbdev;
685 INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker);
687 drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
692 void intel_fbdev_initial_config(void *data, async_cookie_t cookie)
694 struct drm_i915_private *dev_priv = data;
695 struct intel_fbdev *ifbdev = dev_priv->fbdev;
697 /* Due to peculiar init order wrt to hpd handling this is separate. */
698 drm_fb_helper_initial_config(&ifbdev->helper, ifbdev->preferred_bpp);
701 void intel_fbdev_fini(struct drm_device *dev)
703 struct drm_i915_private *dev_priv = dev->dev_private;
704 if (!dev_priv->fbdev)
707 flush_work(&dev_priv->fbdev_suspend_work);
709 async_synchronize_full();
710 intel_fbdev_destroy(dev, dev_priv->fbdev);
711 kfree(dev_priv->fbdev);
712 dev_priv->fbdev = NULL;
715 void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous)
717 struct drm_i915_private *dev_priv = dev->dev_private;
718 struct intel_fbdev *ifbdev = dev_priv->fbdev;
719 struct fb_info *info;
724 info = ifbdev->helper.fbdev;
727 /* Flush any pending work to turn the console on, and then
728 * wait to turn it off. It must be synchronous as we are
729 * about to suspend or unload the driver.
731 * Note that from within the work-handler, we cannot flush
732 * ourselves, so only flush outstanding work upon suspend!
734 if (state != FBINFO_STATE_RUNNING)
735 flush_work(&dev_priv->fbdev_suspend_work);
739 * The console lock can be pretty contented on resume due
740 * to all the printk activity. Try to keep it out of the hot
741 * path of resume if possible.
743 WARN_ON(state != FBINFO_STATE_RUNNING);
744 if (!console_trylock()) {
745 /* Don't block our own workqueue as this can
746 * be run in parallel with other i915.ko tasks.
748 schedule_work(&dev_priv->fbdev_suspend_work);
753 /* On resume from hibernation: If the object is shmemfs backed, it has
754 * been restored from swap. If the object is stolen however, it will be
755 * full of whatever garbage was left in there.
757 if (state == FBINFO_STATE_RUNNING && ifbdev->fb->obj->stolen)
758 memset_io(info->screen_base, 0, info->screen_size);
760 fb_set_suspend(info, state);
764 void intel_fbdev_output_poll_changed(struct drm_device *dev)
766 struct drm_i915_private *dev_priv = dev->dev_private;
768 drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
771 void intel_fbdev_restore_mode(struct drm_device *dev)
774 struct drm_i915_private *dev_priv = dev->dev_private;
776 if (!dev_priv->fbdev)
779 ret = drm_fb_helper_restore_fbdev_mode_unlocked(&dev_priv->fbdev->helper);
781 DRM_DEBUG("failed to restore crtc mode\n");