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.
28 #include <linux/async.h>
29 #include <linux/module.h>
30 #include <linux/kernel.h>
31 #include <linux/errno.h>
32 #include <linux/string.h>
34 #include <linux/delay.h>
38 #include <drm/drm_crtc.h>
39 #include <drm/drm_fb_helper.h>
40 #include "intel_drv.h"
41 #include <drm/i915_drm.h>
45 static int intel_fbdev_set_par(struct fb_info *info)
47 struct drm_fb_helper *fb_helper = info->par;
48 struct intel_fbdev *ifbdev =
49 container_of(fb_helper, struct intel_fbdev, helper);
52 ret = drm_fb_helper_set_par(info);
56 * FIXME: fbdev presumes that all callbacks also work from
57 * atomic contexts and relies on that for emergency oops
58 * printing. KMS totally doesn't do that and the locking here is
59 * by far not the only place this goes wrong. Ignore this for
60 * now until we solve this for real.
62 mutex_lock(&fb_helper->dev->struct_mutex);
63 ret = i915_gem_object_set_to_gtt_domain(ifbdev->fb->obj,
65 mutex_unlock(&fb_helper->dev->struct_mutex);
71 static struct fb_ops intelfb_ops = {
73 .fb_check_var = drm_fb_helper_check_var,
74 .fb_set_par = intel_fbdev_set_par,
75 .fb_fillrect = cfb_fillrect,
76 .fb_copyarea = cfb_copyarea,
77 .fb_imageblit = cfb_imageblit,
78 .fb_pan_display = drm_fb_helper_pan_display,
79 .fb_blank = drm_fb_helper_blank,
80 .fb_setcmap = drm_fb_helper_setcmap,
81 .fb_debug_enter = drm_fb_helper_debug_enter,
82 .fb_debug_leave = drm_fb_helper_debug_leave,
86 static int intelfb_alloc(struct drm_fb_helper *helper,
87 struct drm_fb_helper_surface_size *sizes)
89 struct intel_fbdev *ifbdev =
90 container_of(helper, struct intel_fbdev, helper);
91 struct drm_framebuffer *fb;
92 struct drm_device *dev = helper->dev;
93 struct drm_mode_fb_cmd2 mode_cmd = {};
94 struct drm_i915_gem_object *obj;
97 /* we don't do packed 24bpp */
98 if (sizes->surface_bpp == 24)
99 sizes->surface_bpp = 32;
101 mode_cmd.width = sizes->surface_width;
102 mode_cmd.height = sizes->surface_height;
104 mode_cmd.pitches[0] = ALIGN(mode_cmd.width *
105 DIV_ROUND_UP(sizes->surface_bpp, 8), 64);
106 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
107 sizes->surface_depth);
109 size = mode_cmd.pitches[0] * mode_cmd.height;
110 size = PAGE_ALIGN(size);
111 obj = i915_gem_object_create_stolen(dev, size);
113 obj = i915_gem_alloc_object(dev, size);
115 DRM_ERROR("failed to allocate framebuffer\n");
120 /* Flush everything out, we'll be doing GTT only from now on */
121 ret = intel_pin_and_fence_fb_obj(dev, obj, NULL);
123 DRM_ERROR("failed to pin obj: %d\n", ret);
127 fb = __intel_framebuffer_create(dev, &mode_cmd, obj);
133 ifbdev->fb = to_intel_framebuffer(fb);
138 i915_gem_object_ggtt_unpin(obj);
140 drm_gem_object_unreference(&obj->base);
145 static int intelfb_create(struct drm_fb_helper *helper,
146 struct drm_fb_helper_surface_size *sizes)
148 struct intel_fbdev *ifbdev =
149 container_of(helper, struct intel_fbdev, helper);
150 struct intel_framebuffer *intel_fb = ifbdev->fb;
151 struct drm_device *dev = helper->dev;
152 struct drm_i915_private *dev_priv = dev->dev_private;
153 struct fb_info *info;
154 struct drm_framebuffer *fb;
155 struct drm_i915_gem_object *obj;
158 bool prealloc = false;
160 mutex_lock(&dev->struct_mutex);
163 (sizes->fb_width > intel_fb->base.width ||
164 sizes->fb_height > intel_fb->base.height)) {
165 DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d),"
167 intel_fb->base.width, intel_fb->base.height,
168 sizes->fb_width, sizes->fb_height);
169 drm_framebuffer_unreference(&intel_fb->base);
170 intel_fb = ifbdev->fb = NULL;
172 if (!intel_fb || WARN_ON(!intel_fb->obj)) {
173 DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n");
174 ret = intelfb_alloc(helper, sizes);
177 intel_fb = ifbdev->fb;
179 DRM_DEBUG_KMS("re-using BIOS fb\n");
181 sizes->fb_width = intel_fb->base.width;
182 sizes->fb_height = intel_fb->base.height;
186 size = obj->base.size;
189 info = framebuffer_alloc(0, &dev->pdev->dev);
191 info = kmalloc(sizeof(struct fb_info), M_DRM, M_WAITOK | M_ZERO);
202 vga_dev = device_get_parent(dev->dev);
203 info = kmalloc(sizeof(struct fb_info), M_DRM, M_WAITOK | M_ZERO);
204 info->width = sizes->fb_width;
205 info->height = sizes->fb_height;
207 ALIGN(sizes->surface_width * ((sizes->surface_bpp + 7) / 8), 64);
208 info->depth = sizes->surface_bpp;
209 info->paddr = dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj);
210 info->is_vga_boot_display = vga_pci_is_boot_display(vga_dev);
212 (vm_offset_t)pmap_mapdev_attr(info->paddr,
213 sizes->surface_height * info->stride,
214 VM_MEMATTR_WRITE_COMBINING);
217 fb = &ifbdev->fb->base;
219 ifbdev->helper.fb = fb;
220 ifbdev->helper.fbdev = info;
223 strcpy(info->fix.id, "inteldrmfb");
225 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
226 info->fbops = &intelfb_ops;
228 ret = fb_alloc_cmap(&info->cmap, 256, 0);
233 /* setup aperture base/size for vesafb takeover */
234 info->apertures = alloc_apertures(1);
235 if (!info->apertures) {
239 info->apertures->ranges[0].base = dev->mode_config.fb_base;
240 info->apertures->ranges[0].size = dev_priv->gtt.mappable_end;
242 info->fix.smem_start = dev->mode_config.fb_base + i915_gem_obj_ggtt_offset(obj);
243 info->fix.smem_len = size;
246 ioremap_wc(dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj),
248 if (!info->screen_base) {
252 info->screen_size = size;
254 /* This driver doesn't need a VT switch to restore the mode on resume */
255 info->skip_vt_switch = true;
257 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
258 drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
260 /* If the object is shmemfs backed, it will have given us zeroed pages.
261 * If the object is stolen however, it will be full of whatever
262 * garbage was left in there.
264 if (ifbdev->fb->obj->stolen && !prealloc)
265 memset_io(info->screen_base, 0, info->screen_size);
267 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
270 DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08lx, bo %p\n",
271 fb->width, fb->height,
272 i915_gem_obj_ggtt_offset(obj), obj);
274 mutex_unlock(&dev->struct_mutex);
276 vga_switcheroo_client_fb_set(dev->pdev, info);
281 i915_gem_object_ggtt_unpin(obj);
282 drm_gem_object_unreference(&obj->base);
284 mutex_unlock(&dev->struct_mutex);
288 /** Sets the color ramps on behalf of RandR */
289 static void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
292 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
294 intel_crtc->lut_r[regno] = red >> 8;
295 intel_crtc->lut_g[regno] = green >> 8;
296 intel_crtc->lut_b[regno] = blue >> 8;
299 static void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
300 u16 *blue, int regno)
302 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
304 *red = intel_crtc->lut_r[regno] << 8;
305 *green = intel_crtc->lut_g[regno] << 8;
306 *blue = intel_crtc->lut_b[regno] << 8;
309 static struct drm_fb_helper_crtc *
310 intel_fb_helper_crtc(struct drm_fb_helper *fb_helper, struct drm_crtc *crtc)
314 for (i = 0; i < fb_helper->crtc_count; i++)
315 if (fb_helper->crtc_info[i].mode_set.crtc == crtc)
316 return &fb_helper->crtc_info[i];
322 * Try to read the BIOS display configuration and use it for the initial
325 * The BIOS or boot loader will generally create an initial display
326 * configuration for us that includes some set of active pipes and displays.
327 * This routine tries to figure out which pipes and connectors are active
328 * and stuffs them into the crtcs and modes array given to us by the
329 * drm_fb_helper code.
331 * The overall sequence is:
332 * intel_fbdev_init - from driver load
333 * intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data
334 * drm_fb_helper_init - build fb helper structs
335 * drm_fb_helper_single_add_all_connectors - more fb helper structs
336 * intel_fbdev_initial_config - apply the config
337 * drm_fb_helper_initial_config - call ->probe then register_framebuffer()
338 * drm_setup_crtcs - build crtc config for fbdev
339 * intel_fb_initial_config - find active connectors etc
340 * drm_fb_helper_single_fb_probe - set up fbdev
341 * intelfb_create - re-use or alloc fb, build out fbdev structs
343 * Note that we don't make special consideration whether we could actually
344 * switch to the selected modes without a full modeset. E.g. when the display
345 * is in VGA mode we need to recalculate watermarks and set a new high-res
346 * framebuffer anyway.
348 static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper,
349 struct drm_fb_helper_crtc **crtcs,
350 struct drm_display_mode **modes,
351 bool *enabled, int width, int height)
353 struct drm_device *dev = fb_helper->dev;
356 bool fallback = true;
357 int num_connectors_enabled = 0;
358 int num_connectors_detected = 0;
360 save_enabled = kcalloc(dev->mode_config.num_connector, sizeof(bool),
365 memcpy(save_enabled, enabled, dev->mode_config.num_connector);
367 for (i = 0; i < fb_helper->connector_count; i++) {
368 struct drm_fb_helper_connector *fb_conn;
369 struct drm_connector *connector;
370 struct drm_encoder *encoder;
371 struct drm_fb_helper_crtc *new_crtc;
373 fb_conn = fb_helper->connector_info[i];
374 connector = fb_conn->connector;
376 if (connector->status == connector_status_connected)
377 num_connectors_detected++;
380 DRM_DEBUG_KMS("connector %s not enabled, skipping\n",
385 if (connector->force == DRM_FORCE_OFF) {
386 DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n",
392 encoder = connector->encoder;
393 if (!encoder || WARN_ON(!encoder->crtc)) {
394 if (connector->force > DRM_FORCE_OFF)
397 DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n",
403 num_connectors_enabled++;
405 new_crtc = intel_fb_helper_crtc(fb_helper, encoder->crtc);
408 * Make sure we're not trying to drive multiple connectors
409 * with a single CRTC, since our cloning support may not
412 for (j = 0; j < fb_helper->connector_count; j++) {
413 if (crtcs[j] == new_crtc) {
414 DRM_DEBUG_KMS("fallback: cloned configuration\n");
419 DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n",
422 /* go for command line mode first */
423 modes[i] = drm_pick_cmdline_mode(fb_conn, width, height);
425 /* try for preferred next */
427 DRM_DEBUG_KMS("looking for preferred mode on connector %s\n",
429 modes[i] = drm_has_preferred_mode(fb_conn, width,
433 /* No preferred mode marked by the EDID? Are there any modes? */
434 if (!modes[i] && !list_empty(&connector->modes)) {
435 DRM_DEBUG_KMS("using first mode listed on connector %s\n",
437 modes[i] = list_first_entry(&connector->modes,
438 struct drm_display_mode,
442 /* last resort: use current mode */
445 * IMPORTANT: We want to use the adjusted mode (i.e.
446 * after the panel fitter upscaling) as the initial
447 * config, not the input mode, which is what crtc->mode
448 * usually contains. But since our current fastboot
449 * code puts a mode derived from the post-pfit timings
450 * into crtc->mode this works out correctly. We don't
451 * use hwmode anywhere right now, so use it for this
452 * since the fb helper layer wants a pointer to
455 DRM_DEBUG_KMS("looking for current mode on connector %s\n",
457 intel_mode_from_pipe_config(&encoder->crtc->hwmode,
458 &to_intel_crtc(encoder->crtc)->config);
459 modes[i] = &encoder->crtc->hwmode;
463 DRM_DEBUG_KMS("connector %s on pipe %c [CRTC:%d]: %dx%d%s\n",
465 pipe_name(to_intel_crtc(encoder->crtc)->pipe),
466 encoder->crtc->base.id,
467 modes[i]->hdisplay, modes[i]->vdisplay,
468 modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :"");
474 * If the BIOS didn't enable everything it could, fall back to have the
475 * same user experiencing of lighting up as much as possible like the
476 * fbdev helper library.
478 if (num_connectors_enabled != num_connectors_detected &&
479 num_connectors_enabled < INTEL_INFO(dev)->num_pipes) {
480 DRM_DEBUG_KMS("fallback: Not all outputs enabled\n");
481 DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled,
482 num_connectors_detected);
488 DRM_DEBUG_KMS("Not using firmware configuration\n");
489 memcpy(enabled, save_enabled, dev->mode_config.num_connector);
498 static const struct drm_fb_helper_funcs intel_fb_helper_funcs = {
499 .initial_config = intel_fb_initial_config,
500 .gamma_set = intel_crtc_fb_gamma_set,
501 .gamma_get = intel_crtc_fb_gamma_get,
502 .fb_probe = intelfb_create,
505 static void intel_fbdev_destroy(struct drm_device *dev,
506 struct intel_fbdev *ifbdev)
509 if (ifbdev->helper.fbdev) {
510 struct fb_info *info = ifbdev->helper.fbdev;
512 unregister_framebuffer(info);
513 iounmap(info->screen_base);
515 fb_dealloc_cmap(&info->cmap);
517 framebuffer_release(info);
521 drm_fb_helper_fini(&ifbdev->helper);
523 drm_framebuffer_unregister_private(&ifbdev->fb->base);
524 drm_framebuffer_unreference(&ifbdev->fb->base);
528 * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible.
529 * The core display code will have read out the current plane configuration,
530 * so we use that to figure out if there's an object for us to use as the
531 * fb, and if so, we re-use it for the fbdev configuration.
533 * Note we only support a single fb shared across pipes for boot (mostly for
534 * fbcon), so we just find the biggest and use that.
536 static bool intel_fbdev_init_bios(struct drm_device *dev,
537 struct intel_fbdev *ifbdev)
539 struct intel_framebuffer *fb = NULL;
540 struct drm_crtc *crtc;
541 struct intel_crtc *intel_crtc;
542 struct intel_plane_config *plane_config = NULL;
543 unsigned int max_size = 0;
548 /* Find the largest fb */
549 for_each_crtc(dev, crtc) {
550 intel_crtc = to_intel_crtc(crtc);
552 if (!intel_crtc->active || !crtc->primary->fb) {
553 DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n",
554 pipe_name(intel_crtc->pipe));
558 if (intel_crtc->plane_config.size > max_size) {
559 DRM_DEBUG_KMS("found possible fb from plane %c\n",
560 pipe_name(intel_crtc->pipe));
561 plane_config = &intel_crtc->plane_config;
562 fb = to_intel_framebuffer(crtc->primary->fb);
563 max_size = plane_config->size;
568 DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n");
572 /* Now make sure all the pipes will fit into it */
573 for_each_crtc(dev, crtc) {
574 unsigned int cur_size;
576 intel_crtc = to_intel_crtc(crtc);
578 if (!intel_crtc->active) {
579 DRM_DEBUG_KMS("pipe %c not active, skipping\n",
580 pipe_name(intel_crtc->pipe));
584 DRM_DEBUG_KMS("checking plane %c for BIOS fb\n",
585 pipe_name(intel_crtc->pipe));
588 * See if the plane fb we found above will fit on this
589 * pipe. Note we need to use the selected fb's pitch and bpp
590 * rather than the current pipe's, since they differ.
592 cur_size = intel_crtc->config.adjusted_mode.crtc_hdisplay;
593 cur_size = cur_size * fb->base.bits_per_pixel / 8;
594 if (fb->base.pitches[0] < cur_size) {
595 DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n",
596 pipe_name(intel_crtc->pipe),
597 cur_size, fb->base.pitches[0]);
603 cur_size = intel_crtc->config.adjusted_mode.crtc_vdisplay;
604 cur_size = ALIGN(cur_size, plane_config->tiled ? (IS_GEN2(dev) ? 16 : 8) : 1);
605 cur_size *= fb->base.pitches[0];
606 DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n",
607 pipe_name(intel_crtc->pipe),
608 intel_crtc->config.adjusted_mode.crtc_hdisplay,
609 intel_crtc->config.adjusted_mode.crtc_vdisplay,
610 fb->base.bits_per_pixel,
613 if (cur_size > max_size) {
614 DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n",
615 pipe_name(intel_crtc->pipe),
622 DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n",
623 pipe_name(intel_crtc->pipe),
628 DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n");
632 ifbdev->preferred_bpp = fb->base.bits_per_pixel;
635 drm_framebuffer_reference(&ifbdev->fb->base);
637 /* Final pass to check if any active pipes don't have fbs */
638 for_each_crtc(dev, crtc) {
639 intel_crtc = to_intel_crtc(crtc);
641 if (!intel_crtc->active)
644 WARN(!crtc->primary->fb,
645 "re-used BIOS config but lost an fb on crtc %d\n",
650 DRM_DEBUG_KMS("using BIOS fb for initial console\n");
658 static void intel_fbdev_suspend_worker(struct work_struct *work)
660 intel_fbdev_set_suspend(container_of(work,
661 struct drm_i915_private,
662 fbdev_suspend_work)->dev,
663 FBINFO_STATE_RUNNING,
667 int intel_fbdev_init(struct drm_device *dev)
669 struct intel_fbdev *ifbdev;
670 struct drm_i915_private *dev_priv = dev->dev_private;
673 if (WARN_ON(INTEL_INFO(dev)->num_pipes == 0))
676 ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
680 drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs);
682 if (!intel_fbdev_init_bios(dev, ifbdev))
683 ifbdev->preferred_bpp = 32;
685 ret = drm_fb_helper_init(dev, &ifbdev->helper,
686 INTEL_INFO(dev)->num_pipes, 4);
692 dev_priv->fbdev = ifbdev;
693 INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker);
695 drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
700 void intel_fbdev_initial_config(void *data, async_cookie_t cookie)
702 struct drm_i915_private *dev_priv = data;
704 /* Due to peculiar init order wrt to hpd handling this is separate. */
705 drm_fb_helper_initial_config(&dev_priv->fbdev->helper, 32);
708 void intel_fbdev_fini(struct drm_device *dev)
710 struct drm_i915_private *dev_priv = dev->dev_private;
711 if (!dev_priv->fbdev)
715 flush_work(&dev_priv->fbdev_suspend_work);
718 async_synchronize_full();
719 intel_fbdev_destroy(dev, dev_priv->fbdev);
720 kfree(dev_priv->fbdev);
721 dev_priv->fbdev = NULL;
724 void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous)
727 struct drm_i915_private *dev_priv = dev->dev_private;
728 struct intel_fbdev *ifbdev = dev_priv->fbdev;
729 struct fb_info *info;
734 info = ifbdev->helper.fbdev;
737 /* Flush any pending work to turn the console on, and then
738 * wait to turn it off. It must be synchronous as we are
739 * about to suspend or unload the driver.
741 * Note that from within the work-handler, we cannot flush
742 * ourselves, so only flush outstanding work upon suspend!
744 if (state != FBINFO_STATE_RUNNING)
745 flush_work(&dev_priv->fbdev_suspend_work);
749 * The console lock can be pretty contented on resume due
750 * to all the printk activity. Try to keep it out of the hot
751 * path of resume if possible.
753 WARN_ON(state != FBINFO_STATE_RUNNING);
754 if (!console_trylock()) {
755 /* Don't block our own workqueue as this can
756 * be run in parallel with other i915.ko tasks.
758 schedule_work(&dev_priv->fbdev_suspend_work);
763 /* On resume from hibernation: If the object is shmemfs backed, it has
764 * been restored from swap. If the object is stolen however, it will be
765 * full of whatever garbage was left in there.
767 if (state == FBINFO_STATE_RUNNING && ifbdev->fb->obj->stolen)
768 memset_io(info->screen_base, 0, info->screen_size);
770 fb_set_suspend(info, state);
775 void intel_fbdev_output_poll_changed(struct drm_device *dev)
777 struct drm_i915_private *dev_priv = dev->dev_private;
778 drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
781 void intel_fbdev_restore_mode(struct drm_device *dev)
784 struct drm_i915_private *dev_priv = dev->dev_private;
786 if (INTEL_INFO(dev)->num_pipes == 0)
789 ret = drm_fb_helper_restore_fbdev_mode_unlocked(&dev_priv->fbdev->helper);
791 DRM_DEBUG("failed to restore crtc mode\n");