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/module.h>
28 #include <linux/kernel.h>
29 #include <linux/errno.h>
30 #include <linux/string.h>
32 #include <linux/tty.h>
33 #include <linux/sysrq.h>
34 #include <linux/delay.h>
36 #include <linux/init.h>
37 #include <linux/vga_switcheroo.h>
40 #include <drm/drm_crtc.h>
41 #include <drm/drm_fb_helper.h>
42 #include "intel_drv.h"
43 #include <drm/i915_drm.h>
46 static struct fb_ops intelfb_ops = {
48 .fb_check_var = drm_fb_helper_check_var,
49 .fb_set_par = drm_fb_helper_set_par,
50 .fb_fillrect = cfb_fillrect,
51 .fb_copyarea = cfb_copyarea,
52 .fb_imageblit = cfb_imageblit,
53 .fb_pan_display = drm_fb_helper_pan_display,
54 .fb_blank = drm_fb_helper_blank,
55 .fb_setcmap = drm_fb_helper_setcmap,
56 .fb_debug_enter = drm_fb_helper_debug_enter,
57 .fb_debug_leave = drm_fb_helper_debug_leave,
60 static int intelfb_alloc(struct drm_fb_helper *helper,
61 struct drm_fb_helper_surface_size *sizes)
63 struct intel_fbdev *ifbdev =
64 container_of(helper, struct intel_fbdev, helper);
65 struct drm_framebuffer *fb;
66 struct drm_device *dev = helper->dev;
67 struct drm_mode_fb_cmd2 mode_cmd = {};
68 struct drm_i915_gem_object *obj;
71 /* we don't do packed 24bpp */
72 if (sizes->surface_bpp == 24)
73 sizes->surface_bpp = 32;
75 mode_cmd.width = sizes->surface_width;
76 mode_cmd.height = sizes->surface_height;
78 mode_cmd.pitches[0] = ALIGN(mode_cmd.width *
79 DIV_ROUND_UP(sizes->surface_bpp, 8), 64);
80 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
81 sizes->surface_depth);
83 size = mode_cmd.pitches[0] * mode_cmd.height;
84 size = ALIGN(size, PAGE_SIZE);
85 obj = i915_gem_object_create_stolen(dev, size);
87 obj = i915_gem_alloc_object(dev, size);
89 DRM_ERROR("failed to allocate framebuffer\n");
94 /* Flush everything out, we'll be doing GTT only from now on */
95 ret = intel_pin_and_fence_fb_obj(dev, obj, NULL);
97 DRM_ERROR("failed to pin obj: %d\n", ret);
101 fb = __intel_framebuffer_create(dev, &mode_cmd, obj);
107 ifbdev->fb = to_intel_framebuffer(fb);
112 i915_gem_object_ggtt_unpin(obj);
114 drm_gem_object_unreference(&obj->base);
119 static int intelfb_create(struct drm_fb_helper *helper,
120 struct drm_fb_helper_surface_size *sizes)
122 struct intel_fbdev *ifbdev =
123 container_of(helper, struct intel_fbdev, helper);
124 struct intel_framebuffer *intel_fb = ifbdev->fb;
125 struct drm_device *dev = helper->dev;
126 struct drm_i915_private *dev_priv = dev->dev_private;
127 struct fb_info *info;
128 struct drm_framebuffer *fb;
129 struct drm_i915_gem_object *obj;
131 bool prealloc = false;
133 mutex_lock(&dev->struct_mutex);
136 (sizes->fb_width > intel_fb->base.width ||
137 sizes->fb_height > intel_fb->base.height)) {
138 DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d),"
140 intel_fb->base.width, intel_fb->base.height,
141 sizes->fb_width, sizes->fb_height);
142 drm_framebuffer_unreference(&intel_fb->base);
143 intel_fb = ifbdev->fb = NULL;
145 if (!intel_fb || WARN_ON(!intel_fb->obj)) {
146 DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n");
147 ret = intelfb_alloc(helper, sizes);
150 intel_fb = ifbdev->fb;
152 DRM_DEBUG_KMS("re-using BIOS fb\n");
154 sizes->fb_width = intel_fb->base.width;
155 sizes->fb_height = intel_fb->base.height;
159 size = obj->base.size;
161 info = framebuffer_alloc(0, &dev->pdev->dev);
169 fb = &ifbdev->fb->base;
171 ifbdev->helper.fb = fb;
172 ifbdev->helper.fbdev = info;
174 strcpy(info->fix.id, "inteldrmfb");
176 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
177 info->fbops = &intelfb_ops;
179 ret = fb_alloc_cmap(&info->cmap, 256, 0);
184 /* setup aperture base/size for vesafb takeover */
185 info->apertures = alloc_apertures(1);
186 if (!info->apertures) {
190 info->apertures->ranges[0].base = dev->mode_config.fb_base;
191 info->apertures->ranges[0].size = dev_priv->gtt.mappable_end;
193 info->fix.smem_start = dev->mode_config.fb_base + i915_gem_obj_ggtt_offset(obj);
194 info->fix.smem_len = size;
197 ioremap_wc(dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj),
199 if (!info->screen_base) {
203 info->screen_size = size;
205 /* This driver doesn't need a VT switch to restore the mode on resume */
206 info->skip_vt_switch = true;
208 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
209 drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
211 /* If the object is shmemfs backed, it will have given us zeroed pages.
212 * If the object is stolen however, it will be full of whatever
213 * garbage was left in there.
215 if (ifbdev->fb->obj->stolen && !prealloc)
216 memset_io(info->screen_base, 0, info->screen_size);
218 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
220 DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08lx, bo %p\n",
221 fb->width, fb->height,
222 i915_gem_obj_ggtt_offset(obj), obj);
224 mutex_unlock(&dev->struct_mutex);
225 vga_switcheroo_client_fb_set(dev->pdev, info);
229 i915_gem_object_ggtt_unpin(obj);
230 drm_gem_object_unreference(&obj->base);
232 mutex_unlock(&dev->struct_mutex);
236 /** Sets the color ramps on behalf of RandR */
237 static void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
240 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
242 intel_crtc->lut_r[regno] = red >> 8;
243 intel_crtc->lut_g[regno] = green >> 8;
244 intel_crtc->lut_b[regno] = blue >> 8;
247 static void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
248 u16 *blue, int regno)
250 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
252 *red = intel_crtc->lut_r[regno] << 8;
253 *green = intel_crtc->lut_g[regno] << 8;
254 *blue = intel_crtc->lut_b[regno] << 8;
257 static struct drm_fb_helper_crtc *
258 intel_fb_helper_crtc(struct drm_fb_helper *fb_helper, struct drm_crtc *crtc)
262 for (i = 0; i < fb_helper->crtc_count; i++)
263 if (fb_helper->crtc_info[i].mode_set.crtc == crtc)
264 return &fb_helper->crtc_info[i];
270 * Try to read the BIOS display configuration and use it for the initial
273 * The BIOS or boot loader will generally create an initial display
274 * configuration for us that includes some set of active pipes and displays.
275 * This routine tries to figure out which pipes and connectors are active
276 * and stuffs them into the crtcs and modes array given to us by the
277 * drm_fb_helper code.
279 * The overall sequence is:
280 * intel_fbdev_init - from driver load
281 * intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data
282 * drm_fb_helper_init - build fb helper structs
283 * drm_fb_helper_single_add_all_connectors - more fb helper structs
284 * intel_fbdev_initial_config - apply the config
285 * drm_fb_helper_initial_config - call ->probe then register_framebuffer()
286 * drm_setup_crtcs - build crtc config for fbdev
287 * intel_fb_initial_config - find active connectors etc
288 * drm_fb_helper_single_fb_probe - set up fbdev
289 * intelfb_create - re-use or alloc fb, build out fbdev structs
291 * Note that we don't make special consideration whether we could actually
292 * switch to the selected modes without a full modeset. E.g. when the display
293 * is in VGA mode we need to recalculate watermarks and set a new high-res
294 * framebuffer anyway.
296 static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper,
297 struct drm_fb_helper_crtc **crtcs,
298 struct drm_display_mode **modes,
299 bool *enabled, int width, int height)
301 struct drm_device *dev = fb_helper->dev;
304 bool fallback = true;
305 int num_connectors_enabled = 0;
306 int num_connectors_detected = 0;
309 * If the user specified any force options, just bail here
310 * and use that config.
312 for (i = 0; i < fb_helper->connector_count; i++) {
313 struct drm_fb_helper_connector *fb_conn;
314 struct drm_connector *connector;
316 fb_conn = fb_helper->connector_info[i];
317 connector = fb_conn->connector;
322 if (connector->force != DRM_FORCE_UNSPECIFIED)
326 save_enabled = kcalloc(dev->mode_config.num_connector, sizeof(bool),
331 memcpy(save_enabled, enabled, dev->mode_config.num_connector);
333 for (i = 0; i < fb_helper->connector_count; i++) {
334 struct drm_fb_helper_connector *fb_conn;
335 struct drm_connector *connector;
336 struct drm_encoder *encoder;
337 struct drm_fb_helper_crtc *new_crtc;
339 fb_conn = fb_helper->connector_info[i];
340 connector = fb_conn->connector;
342 if (connector->status == connector_status_connected)
343 num_connectors_detected++;
346 DRM_DEBUG_KMS("connector %d not enabled, skipping\n",
351 encoder = connector->encoder;
352 if (!encoder || WARN_ON(!encoder->crtc)) {
353 DRM_DEBUG_KMS("connector %d has no encoder or crtc, skipping\n",
359 num_connectors_enabled++;
361 new_crtc = intel_fb_helper_crtc(fb_helper, encoder->crtc);
364 * Make sure we're not trying to drive multiple connectors
365 * with a single CRTC, since our cloning support may not
368 for (j = 0; j < fb_helper->connector_count; j++) {
369 if (crtcs[j] == new_crtc) {
370 DRM_DEBUG_KMS("fallback: cloned configuration\n");
376 DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n",
377 fb_conn->connector->base.id);
379 /* go for command line mode first */
380 modes[i] = drm_pick_cmdline_mode(fb_conn, width, height);
382 /* try for preferred next */
384 DRM_DEBUG_KMS("looking for preferred mode on connector %d\n",
385 fb_conn->connector->base.id);
386 modes[i] = drm_has_preferred_mode(fb_conn, width,
390 /* last resort: use current mode */
393 * IMPORTANT: We want to use the adjusted mode (i.e.
394 * after the panel fitter upscaling) as the initial
395 * config, not the input mode, which is what crtc->mode
396 * usually contains. But since our current fastboot
397 * code puts a mode derived from the post-pfit timings
398 * into crtc->mode this works out correctly. We don't
399 * use hwmode anywhere right now, so use it for this
400 * since the fb helper layer wants a pointer to
403 intel_mode_from_pipe_config(&encoder->crtc->hwmode,
404 &to_intel_crtc(encoder->crtc)->config);
405 modes[i] = &encoder->crtc->hwmode;
409 DRM_DEBUG_KMS("connector %s on crtc %d: %s\n",
410 drm_get_connector_name(connector),
411 encoder->crtc->base.id,
418 * If the BIOS didn't enable everything it could, fall back to have the
419 * same user experiencing of lighting up as much as possible like the
420 * fbdev helper library.
422 if (num_connectors_enabled != num_connectors_detected &&
423 num_connectors_enabled < INTEL_INFO(dev)->num_pipes) {
424 DRM_DEBUG_KMS("fallback: Not all outputs enabled\n");
425 DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled,
426 num_connectors_detected);
432 DRM_DEBUG_KMS("Not using firmware configuration\n");
433 memcpy(enabled, save_enabled, dev->mode_config.num_connector);
442 static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
443 .initial_config = intel_fb_initial_config,
444 .gamma_set = intel_crtc_fb_gamma_set,
445 .gamma_get = intel_crtc_fb_gamma_get,
446 .fb_probe = intelfb_create,
449 static void intel_fbdev_destroy(struct drm_device *dev,
450 struct intel_fbdev *ifbdev)
452 if (ifbdev->helper.fbdev) {
453 struct fb_info *info = ifbdev->helper.fbdev;
455 unregister_framebuffer(info);
456 iounmap(info->screen_base);
458 fb_dealloc_cmap(&info->cmap);
460 framebuffer_release(info);
463 drm_fb_helper_fini(&ifbdev->helper);
465 drm_framebuffer_unregister_private(&ifbdev->fb->base);
466 drm_framebuffer_remove(&ifbdev->fb->base);
470 * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible.
471 * The core display code will have read out the current plane configuration,
472 * so we use that to figure out if there's an object for us to use as the
473 * fb, and if so, we re-use it for the fbdev configuration.
475 * Note we only support a single fb shared across pipes for boot (mostly for
476 * fbcon), so we just find the biggest and use that.
478 static bool intel_fbdev_init_bios(struct drm_device *dev,
479 struct intel_fbdev *ifbdev)
481 struct intel_framebuffer *fb = NULL;
482 struct drm_crtc *crtc;
483 struct intel_crtc *intel_crtc;
484 struct intel_plane_config *plane_config = NULL;
485 unsigned int max_size = 0;
490 /* Find the largest fb */
491 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
492 intel_crtc = to_intel_crtc(crtc);
494 if (!intel_crtc->active || !crtc->primary->fb) {
495 DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n",
496 pipe_name(intel_crtc->pipe));
500 if (intel_crtc->plane_config.size > max_size) {
501 DRM_DEBUG_KMS("found possible fb from plane %c\n",
502 pipe_name(intel_crtc->pipe));
503 plane_config = &intel_crtc->plane_config;
504 fb = to_intel_framebuffer(crtc->primary->fb);
505 max_size = plane_config->size;
510 DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n");
514 /* Now make sure all the pipes will fit into it */
515 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
516 unsigned int cur_size;
518 intel_crtc = to_intel_crtc(crtc);
520 if (!intel_crtc->active) {
521 DRM_DEBUG_KMS("pipe %c not active, skipping\n",
522 pipe_name(intel_crtc->pipe));
526 DRM_DEBUG_KMS("checking plane %c for BIOS fb\n",
527 pipe_name(intel_crtc->pipe));
530 * See if the plane fb we found above will fit on this
531 * pipe. Note we need to use the selected fb's pitch and bpp
532 * rather than the current pipe's, since they differ.
534 cur_size = intel_crtc->config.adjusted_mode.crtc_hdisplay;
535 cur_size = cur_size * fb->base.bits_per_pixel / 8;
536 if (fb->base.pitches[0] < cur_size) {
537 DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n",
538 pipe_name(intel_crtc->pipe),
539 cur_size, fb->base.pitches[0]);
545 cur_size = intel_crtc->config.adjusted_mode.crtc_vdisplay;
546 cur_size = ALIGN(cur_size, plane_config->tiled ? (IS_GEN2(dev) ? 16 : 8) : 1);
547 cur_size *= fb->base.pitches[0];
548 DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n",
549 pipe_name(intel_crtc->pipe),
550 intel_crtc->config.adjusted_mode.crtc_hdisplay,
551 intel_crtc->config.adjusted_mode.crtc_vdisplay,
552 fb->base.bits_per_pixel,
555 if (cur_size > max_size) {
556 DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n",
557 pipe_name(intel_crtc->pipe),
564 DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n",
565 pipe_name(intel_crtc->pipe),
570 DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n");
574 ifbdev->preferred_bpp = fb->base.bits_per_pixel;
577 drm_framebuffer_reference(&ifbdev->fb->base);
579 /* Final pass to check if any active pipes don't have fbs */
580 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
581 intel_crtc = to_intel_crtc(crtc);
583 if (!intel_crtc->active)
586 WARN(!crtc->primary->fb,
587 "re-used BIOS config but lost an fb on crtc %d\n",
592 DRM_DEBUG_KMS("using BIOS fb for initial console\n");
600 int intel_fbdev_init(struct drm_device *dev)
602 struct intel_fbdev *ifbdev;
603 struct drm_i915_private *dev_priv = dev->dev_private;
606 if (WARN_ON(INTEL_INFO(dev)->num_pipes == 0))
609 ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
613 ifbdev->helper.funcs = &intel_fb_helper_funcs;
614 if (!intel_fbdev_init_bios(dev, ifbdev))
615 ifbdev->preferred_bpp = 32;
617 ret = drm_fb_helper_init(dev, &ifbdev->helper,
618 INTEL_INFO(dev)->num_pipes, 4);
624 dev_priv->fbdev = ifbdev;
625 drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
630 void intel_fbdev_initial_config(struct drm_device *dev)
632 struct drm_i915_private *dev_priv = dev->dev_private;
633 struct intel_fbdev *ifbdev = dev_priv->fbdev;
635 /* Due to peculiar init order wrt to hpd handling this is separate. */
636 drm_fb_helper_initial_config(&ifbdev->helper, ifbdev->preferred_bpp);
639 void intel_fbdev_fini(struct drm_device *dev)
641 struct drm_i915_private *dev_priv = dev->dev_private;
642 if (!dev_priv->fbdev)
645 intel_fbdev_destroy(dev, dev_priv->fbdev);
646 kfree(dev_priv->fbdev);
647 dev_priv->fbdev = NULL;
650 void intel_fbdev_set_suspend(struct drm_device *dev, int state)
652 struct drm_i915_private *dev_priv = dev->dev_private;
653 struct intel_fbdev *ifbdev = dev_priv->fbdev;
654 struct fb_info *info;
659 info = ifbdev->helper.fbdev;
661 /* On resume from hibernation: If the object is shmemfs backed, it has
662 * been restored from swap. If the object is stolen however, it will be
663 * full of whatever garbage was left in there.
665 if (state == FBINFO_STATE_RUNNING && ifbdev->fb->obj->stolen)
666 memset_io(info->screen_base, 0, info->screen_size);
668 fb_set_suspend(info, state);
671 void intel_fbdev_output_poll_changed(struct drm_device *dev)
673 struct drm_i915_private *dev_priv = dev->dev_private;
675 drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
678 void intel_fbdev_restore_mode(struct drm_device *dev)
681 struct drm_i915_private *dev_priv = dev->dev_private;
683 if (!dev_priv->fbdev)
686 drm_modeset_lock_all(dev);
688 ret = drm_fb_helper_restore_fbdev_mode(&dev_priv->fbdev->helper);
690 DRM_DEBUG("failed to restore crtc mode\n");
692 drm_modeset_unlock_all(dev);