2 * Copyright (c) 2006-2009 Red Hat Inc.
3 * Copyright (c) 2006-2008 Intel Corporation
4 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
6 * DRM framebuffer helper functions
8 * Permission to use, copy, modify, distribute, and sell this software and its
9 * documentation for any purpose is hereby granted without fee, provided that
10 * the above copyright notice appear in all copies and that both that copyright
11 * notice and this permission notice appear in supporting documentation, and
12 * that the name of the copyright holders not be used in advertising or
13 * publicity pertaining to distribution of the software without specific,
14 * written prior permission. The copyright holders make no representations
15 * about the suitability of this software for any purpose. It is provided "as
16 * is" without express or implied warranty.
18 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
19 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
20 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
21 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
22 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
23 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
27 * Dave Airlie <airlied@linux.ie>
28 * Jesse Barnes <jesse.barnes@intel.com>
30 #include <linux/kernel.h>
31 #include <linux/sysrq.h>
32 #include <linux/slab.h>
36 #include "drm_fb_helper.h"
37 #include "drm_crtc_helper.h"
39 MODULE_AUTHOR("David Airlie, Jesse Barnes");
40 MODULE_DESCRIPTION("DRM KMS helper");
41 MODULE_LICENSE("GPL and additional rights");
43 static LIST_HEAD(kernel_fb_helper_list);
45 /* simple single crtc case helper function */
46 int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper)
48 struct drm_device *dev = fb_helper->dev;
49 struct drm_connector *connector;
52 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
53 struct drm_fb_helper_connector *fb_helper_connector;
55 fb_helper_connector = kzalloc(sizeof(struct drm_fb_helper_connector), GFP_KERNEL);
56 if (!fb_helper_connector)
59 fb_helper_connector->connector = connector;
60 fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector;
64 for (i = 0; i < fb_helper->connector_count; i++) {
65 kfree(fb_helper->connector_info[i]);
66 fb_helper->connector_info[i] = NULL;
68 fb_helper->connector_count = 0;
71 EXPORT_SYMBOL(drm_fb_helper_single_add_all_connectors);
74 * drm_fb_helper_connector_parse_command_line - parse command line for connector
75 * @connector - connector to parse line for
76 * @mode_option - per connector mode option
78 * This parses the connector specific then generic command lines for
79 * modes and options to configure the connector.
81 * This uses the same parameters as the fb modedb.c, except for extra
82 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd]
84 * enable/enable Digital/disable bit at the end
86 static bool drm_fb_helper_connector_parse_command_line(struct drm_fb_helper_connector *fb_helper_conn,
87 const char *mode_option)
91 int res_specified = 0, bpp_specified = 0, refresh_specified = 0;
92 unsigned int xres = 0, yres = 0, bpp = 32, refresh = 0;
93 int yres_specified = 0, cvt = 0, rb = 0, interlace = 0, margins = 0;
95 enum drm_connector_force force = DRM_FORCE_UNSPECIFIED;
96 struct drm_fb_helper_cmdline_mode *cmdline_mode;
97 struct drm_connector *connector = fb_helper_conn->connector;
102 cmdline_mode = &fb_helper_conn->cmdline_mode;
104 mode_option = fb_mode_option;
107 cmdline_mode->specified = false;
112 namelen = strlen(name);
113 for (i = namelen-1; i >= 0; i--) {
117 if (!refresh_specified && !bpp_specified &&
119 refresh = simple_strtol(&name[i+1], NULL, 10);
120 refresh_specified = 1;
128 if (!bpp_specified && !yres_specified) {
129 bpp = simple_strtol(&name[i+1], NULL, 10);
137 if (!yres_specified) {
138 yres = simple_strtol(&name[i+1], NULL, 10);
161 force = DRM_FORCE_ON;
164 if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) &&
165 (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB))
166 force = DRM_FORCE_ON;
168 force = DRM_FORCE_ON_DIGITAL;
171 force = DRM_FORCE_OFF;
177 if (i < 0 && yres_specified) {
178 xres = simple_strtol(name, NULL, 10);
183 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n",
184 drm_get_connector_name(connector), xres, yres,
185 (refresh) ? refresh : 60, (rb) ? " reduced blanking" :
186 "", (margins) ? " with margins" : "", (interlace) ?
192 case DRM_FORCE_OFF: s = "OFF"; break;
193 case DRM_FORCE_ON_DIGITAL: s = "ON - dig"; break;
195 case DRM_FORCE_ON: s = "ON"; break;
198 DRM_INFO("forcing %s connector %s\n",
199 drm_get_connector_name(connector), s);
200 connector->force = force;
204 cmdline_mode->specified = true;
205 cmdline_mode->xres = xres;
206 cmdline_mode->yres = yres;
209 if (refresh_specified) {
210 cmdline_mode->refresh_specified = true;
211 cmdline_mode->refresh = refresh;
215 cmdline_mode->bpp_specified = true;
216 cmdline_mode->bpp = bpp;
218 cmdline_mode->rb = rb ? true : false;
219 cmdline_mode->cvt = cvt ? true : false;
220 cmdline_mode->interlace = interlace ? true : false;
225 static int drm_fb_helper_parse_command_line(struct drm_fb_helper *fb_helper)
227 struct drm_fb_helper_connector *fb_helper_conn;
230 for (i = 0; i < fb_helper->connector_count; i++) {
233 fb_helper_conn = fb_helper->connector_info[i];
235 /* do something on return - turn off connector maybe */
236 if (fb_get_options(drm_get_connector_name(fb_helper_conn->connector), &option))
239 drm_fb_helper_connector_parse_command_line(fb_helper_conn, option);
244 int drm_fb_helper_debug_enter(struct fb_info *info)
246 struct drm_fb_helper *helper = info->par;
247 struct drm_crtc_helper_funcs *funcs;
250 if (list_empty(&kernel_fb_helper_list))
253 list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) {
254 for (i = 0; i < helper->crtc_count; i++) {
255 struct drm_mode_set *mode_set =
256 &helper->crtc_info[i].mode_set;
258 if (!mode_set->crtc->enabled)
261 funcs = mode_set->crtc->helper_private;
262 funcs->mode_set_base_atomic(mode_set->crtc,
272 EXPORT_SYMBOL(drm_fb_helper_debug_enter);
274 /* Find the real fb for a given fb helper CRTC */
275 static struct drm_framebuffer *drm_mode_config_fb(struct drm_crtc *crtc)
277 struct drm_device *dev = crtc->dev;
280 list_for_each_entry(c, &dev->mode_config.crtc_list, head) {
281 if (crtc->base.id == c->base.id)
288 int drm_fb_helper_debug_leave(struct fb_info *info)
290 struct drm_fb_helper *helper = info->par;
291 struct drm_crtc *crtc;
292 struct drm_crtc_helper_funcs *funcs;
293 struct drm_framebuffer *fb;
296 for (i = 0; i < helper->crtc_count; i++) {
297 struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set;
298 crtc = mode_set->crtc;
299 funcs = crtc->helper_private;
300 fb = drm_mode_config_fb(crtc);
306 DRM_ERROR("no fb to restore??\n");
310 funcs->mode_set_base_atomic(mode_set->crtc, fb, crtc->x,
316 EXPORT_SYMBOL(drm_fb_helper_debug_leave);
318 bool drm_fb_helper_force_kernel_mode(void)
321 bool ret, error = false;
322 struct drm_fb_helper *helper;
324 if (list_empty(&kernel_fb_helper_list))
327 list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) {
328 for (i = 0; i < helper->crtc_count; i++) {
329 struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set;
330 ret = drm_crtc_helper_set_config(mode_set);
338 int drm_fb_helper_panic(struct notifier_block *n, unsigned long ununsed,
341 printk(KERN_ERR "panic occurred, switching back to text console\n");
342 return drm_fb_helper_force_kernel_mode();
345 EXPORT_SYMBOL(drm_fb_helper_panic);
347 static struct notifier_block paniced = {
348 .notifier_call = drm_fb_helper_panic,
352 * drm_fb_helper_restore - restore the framebuffer console (kernel) config
354 * Restore's the kernel's fbcon mode, used for lastclose & panic paths.
356 void drm_fb_helper_restore(void)
359 ret = drm_fb_helper_force_kernel_mode();
361 DRM_ERROR("Failed to restore crtc configuration\n");
363 EXPORT_SYMBOL(drm_fb_helper_restore);
365 #ifdef CONFIG_MAGIC_SYSRQ
366 static void drm_fb_helper_restore_work_fn(struct work_struct *ignored)
368 drm_fb_helper_restore();
370 static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn);
372 static void drm_fb_helper_sysrq(int dummy1, struct tty_struct *dummy3)
374 schedule_work(&drm_fb_helper_restore_work);
377 static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = {
378 .handler = drm_fb_helper_sysrq,
379 .help_msg = "force-fb(V)",
380 .action_msg = "Restore framebuffer console",
383 static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { };
386 static void drm_fb_helper_on(struct fb_info *info)
388 struct drm_fb_helper *fb_helper = info->par;
389 struct drm_device *dev = fb_helper->dev;
390 struct drm_crtc *crtc;
391 struct drm_crtc_helper_funcs *crtc_funcs;
392 struct drm_connector *connector;
393 struct drm_encoder *encoder;
397 * For each CRTC in this fb, turn the crtc on then,
398 * find all associated encoders and turn them on.
400 mutex_lock(&dev->mode_config.mutex);
401 for (i = 0; i < fb_helper->crtc_count; i++) {
402 crtc = fb_helper->crtc_info[i].mode_set.crtc;
403 crtc_funcs = crtc->helper_private;
408 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
410 /* Walk the connectors & encoders on this fb turning them on */
411 for (j = 0; j < fb_helper->connector_count; j++) {
412 connector = fb_helper->connector_info[j]->connector;
413 connector->dpms = DRM_MODE_DPMS_ON;
414 drm_connector_property_set_value(connector,
415 dev->mode_config.dpms_property,
418 /* Found a CRTC on this fb, now find encoders */
419 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
420 if (encoder->crtc == crtc) {
421 struct drm_encoder_helper_funcs *encoder_funcs;
423 encoder_funcs = encoder->helper_private;
424 encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
428 mutex_unlock(&dev->mode_config.mutex);
431 static void drm_fb_helper_off(struct fb_info *info, int dpms_mode)
433 struct drm_fb_helper *fb_helper = info->par;
434 struct drm_device *dev = fb_helper->dev;
435 struct drm_crtc *crtc;
436 struct drm_crtc_helper_funcs *crtc_funcs;
437 struct drm_connector *connector;
438 struct drm_encoder *encoder;
442 * For each CRTC in this fb, find all associated encoders
443 * and turn them off, then turn off the CRTC.
445 mutex_lock(&dev->mode_config.mutex);
446 for (i = 0; i < fb_helper->crtc_count; i++) {
447 crtc = fb_helper->crtc_info[i].mode_set.crtc;
448 crtc_funcs = crtc->helper_private;
453 /* Walk the connectors on this fb and mark them off */
454 for (j = 0; j < fb_helper->connector_count; j++) {
455 connector = fb_helper->connector_info[j]->connector;
456 connector->dpms = dpms_mode;
457 drm_connector_property_set_value(connector,
458 dev->mode_config.dpms_property,
461 /* Found a CRTC on this fb, now find encoders */
462 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
463 if (encoder->crtc == crtc) {
464 struct drm_encoder_helper_funcs *encoder_funcs;
466 encoder_funcs = encoder->helper_private;
467 encoder_funcs->dpms(encoder, dpms_mode);
470 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
472 mutex_unlock(&dev->mode_config.mutex);
475 int drm_fb_helper_blank(int blank, struct fb_info *info)
478 /* Display: On; HSync: On, VSync: On */
479 case FB_BLANK_UNBLANK:
480 drm_fb_helper_on(info);
482 /* Display: Off; HSync: On, VSync: On */
483 case FB_BLANK_NORMAL:
484 drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
486 /* Display: Off; HSync: Off, VSync: On */
487 case FB_BLANK_HSYNC_SUSPEND:
488 drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
490 /* Display: Off; HSync: On, VSync: Off */
491 case FB_BLANK_VSYNC_SUSPEND:
492 drm_fb_helper_off(info, DRM_MODE_DPMS_SUSPEND);
494 /* Display: Off; HSync: Off, VSync: Off */
495 case FB_BLANK_POWERDOWN:
496 drm_fb_helper_off(info, DRM_MODE_DPMS_OFF);
501 EXPORT_SYMBOL(drm_fb_helper_blank);
503 static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper)
507 for (i = 0; i < helper->connector_count; i++)
508 kfree(helper->connector_info[i]);
509 kfree(helper->connector_info);
510 for (i = 0; i < helper->crtc_count; i++)
511 kfree(helper->crtc_info[i].mode_set.connectors);
512 kfree(helper->crtc_info);
515 int drm_fb_helper_init(struct drm_device *dev,
516 struct drm_fb_helper *fb_helper,
517 int crtc_count, int max_conn_count)
519 struct drm_crtc *crtc;
523 fb_helper->dev = dev;
525 INIT_LIST_HEAD(&fb_helper->kernel_fb_list);
527 fb_helper->crtc_info = kcalloc(crtc_count, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL);
528 if (!fb_helper->crtc_info)
531 fb_helper->crtc_count = crtc_count;
532 fb_helper->connector_info = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_fb_helper_connector *), GFP_KERNEL);
533 if (!fb_helper->connector_info) {
534 kfree(fb_helper->crtc_info);
537 fb_helper->connector_count = 0;
539 for (i = 0; i < crtc_count; i++) {
540 fb_helper->crtc_info[i].mode_set.connectors =
541 kcalloc(max_conn_count,
542 sizeof(struct drm_connector *),
545 if (!fb_helper->crtc_info[i].mode_set.connectors) {
549 fb_helper->crtc_info[i].mode_set.num_connectors = 0;
553 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
554 fb_helper->crtc_info[i].crtc_id = crtc->base.id;
555 fb_helper->crtc_info[i].mode_set.crtc = crtc;
558 fb_helper->conn_limit = max_conn_count;
561 drm_fb_helper_crtc_free(fb_helper);
564 EXPORT_SYMBOL(drm_fb_helper_init);
566 void drm_fb_helper_fini(struct drm_fb_helper *fb_helper)
568 if (!list_empty(&fb_helper->kernel_fb_list)) {
569 list_del(&fb_helper->kernel_fb_list);
570 if (list_empty(&kernel_fb_helper_list)) {
571 printk(KERN_INFO "drm: unregistered panic notifier\n");
572 atomic_notifier_chain_unregister(&panic_notifier_list,
574 unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op);
578 drm_fb_helper_crtc_free(fb_helper);
581 EXPORT_SYMBOL(drm_fb_helper_fini);
583 static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green,
584 u16 blue, u16 regno, struct fb_info *info)
586 struct drm_fb_helper *fb_helper = info->par;
587 struct drm_framebuffer *fb = fb_helper->fb;
590 if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
593 /* place color in psuedopalette */
596 palette = (u32 *)info->pseudo_palette;
597 red >>= (16 - info->var.red.length);
598 green >>= (16 - info->var.green.length);
599 blue >>= (16 - info->var.blue.length);
600 value = (red << info->var.red.offset) |
601 (green << info->var.green.offset) |
602 (blue << info->var.blue.offset);
603 palette[regno] = value;
609 if (fb->bits_per_pixel == 16) {
612 if (fb->depth == 16 && regno > 63)
614 if (fb->depth == 15 && regno > 31)
617 if (fb->depth == 16) {
621 for (i = 0; i < 8; i++)
622 fb_helper->funcs->gamma_set(crtc, red,
623 green, blue, pindex + i);
626 fb_helper->funcs->gamma_get(crtc, &r,
630 for (i = 0; i < 4; i++)
631 fb_helper->funcs->gamma_set(crtc, r,
638 fb_helper->funcs->gamma_set(crtc, red, green, blue, pindex);
642 int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info)
644 struct drm_fb_helper *fb_helper = info->par;
645 struct drm_crtc_helper_funcs *crtc_funcs;
646 u16 *red, *green, *blue, *transp;
647 struct drm_crtc *crtc;
651 for (i = 0; i < fb_helper->crtc_count; i++) {
652 crtc = fb_helper->crtc_info[i].mode_set.crtc;
653 crtc_funcs = crtc->helper_private;
658 transp = cmap->transp;
661 for (i = 0; i < cmap->len; i++) {
662 u16 hred, hgreen, hblue, htransp = 0xffff;
671 rc = setcolreg(crtc, hred, hgreen, hblue, start++, info);
675 crtc_funcs->load_lut(crtc);
679 EXPORT_SYMBOL(drm_fb_helper_setcmap);
681 int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
682 struct fb_info *info)
684 struct drm_fb_helper *fb_helper = info->par;
685 struct drm_framebuffer *fb = fb_helper->fb;
688 if (var->pixclock != 0 || in_dbg_master())
691 /* Need to resize the fb object !!! */
692 if (var->bits_per_pixel > fb->bits_per_pixel || var->xres > fb->width || var->yres > fb->height) {
693 DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb "
694 "object %dx%d-%d > %dx%d-%d\n", var->xres, var->yres, var->bits_per_pixel,
695 fb->width, fb->height, fb->bits_per_pixel);
699 switch (var->bits_per_pixel) {
701 depth = (var->green.length == 6) ? 16 : 15;
704 depth = (var->transp.length > 0) ? 32 : 24;
707 depth = var->bits_per_pixel;
714 var->green.offset = 0;
715 var->blue.offset = 0;
717 var->green.length = 8;
718 var->blue.length = 8;
719 var->transp.length = 0;
720 var->transp.offset = 0;
723 var->red.offset = 10;
724 var->green.offset = 5;
725 var->blue.offset = 0;
727 var->green.length = 5;
728 var->blue.length = 5;
729 var->transp.length = 1;
730 var->transp.offset = 15;
733 var->red.offset = 11;
734 var->green.offset = 5;
735 var->blue.offset = 0;
737 var->green.length = 6;
738 var->blue.length = 5;
739 var->transp.length = 0;
740 var->transp.offset = 0;
743 var->red.offset = 16;
744 var->green.offset = 8;
745 var->blue.offset = 0;
747 var->green.length = 8;
748 var->blue.length = 8;
749 var->transp.length = 0;
750 var->transp.offset = 0;
753 var->red.offset = 16;
754 var->green.offset = 8;
755 var->blue.offset = 0;
757 var->green.length = 8;
758 var->blue.length = 8;
759 var->transp.length = 8;
760 var->transp.offset = 24;
767 EXPORT_SYMBOL(drm_fb_helper_check_var);
769 /* this will let fbcon do the mode init */
770 int drm_fb_helper_set_par(struct fb_info *info)
772 struct drm_fb_helper *fb_helper = info->par;
773 struct drm_device *dev = fb_helper->dev;
774 struct fb_var_screeninfo *var = &info->var;
775 struct drm_crtc *crtc;
779 if (var->pixclock != 0) {
780 DRM_ERROR("PIXEL CLOCK SET\n");
784 mutex_lock(&dev->mode_config.mutex);
785 for (i = 0; i < fb_helper->crtc_count; i++) {
786 crtc = fb_helper->crtc_info[i].mode_set.crtc;
787 ret = crtc->funcs->set_config(&fb_helper->crtc_info[i].mode_set);
789 mutex_unlock(&dev->mode_config.mutex);
793 mutex_unlock(&dev->mode_config.mutex);
795 if (fb_helper->delayed_hotplug) {
796 fb_helper->delayed_hotplug = false;
797 drm_fb_helper_hotplug_event(fb_helper);
801 EXPORT_SYMBOL(drm_fb_helper_set_par);
803 int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
804 struct fb_info *info)
806 struct drm_fb_helper *fb_helper = info->par;
807 struct drm_device *dev = fb_helper->dev;
808 struct drm_mode_set *modeset;
809 struct drm_crtc *crtc;
813 mutex_lock(&dev->mode_config.mutex);
814 for (i = 0; i < fb_helper->crtc_count; i++) {
815 crtc = fb_helper->crtc_info[i].mode_set.crtc;
817 modeset = &fb_helper->crtc_info[i].mode_set;
819 modeset->x = var->xoffset;
820 modeset->y = var->yoffset;
822 if (modeset->num_connectors) {
823 ret = crtc->funcs->set_config(modeset);
825 info->var.xoffset = var->xoffset;
826 info->var.yoffset = var->yoffset;
830 mutex_unlock(&dev->mode_config.mutex);
833 EXPORT_SYMBOL(drm_fb_helper_pan_display);
835 int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper,
841 struct fb_info *info;
842 struct drm_fb_helper_surface_size sizes;
845 memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size));
846 sizes.surface_depth = 24;
847 sizes.surface_bpp = 32;
848 sizes.fb_width = (unsigned)-1;
849 sizes.fb_height = (unsigned)-1;
851 /* if driver picks 8 or 16 by default use that
852 for both depth/bpp */
853 if (preferred_bpp != sizes.surface_bpp) {
854 sizes.surface_depth = sizes.surface_bpp = preferred_bpp;
856 /* first up get a count of crtcs now in use and new min/maxes width/heights */
857 for (i = 0; i < fb_helper->connector_count; i++) {
858 struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i];
859 struct drm_fb_helper_cmdline_mode *cmdline_mode;
861 cmdline_mode = &fb_helper_conn->cmdline_mode;
863 if (cmdline_mode->bpp_specified) {
864 switch (cmdline_mode->bpp) {
866 sizes.surface_depth = sizes.surface_bpp = 8;
869 sizes.surface_depth = 15;
870 sizes.surface_bpp = 16;
873 sizes.surface_depth = sizes.surface_bpp = 16;
876 sizes.surface_depth = sizes.surface_bpp = 24;
879 sizes.surface_depth = 24;
880 sizes.surface_bpp = 32;
888 for (i = 0; i < fb_helper->crtc_count; i++) {
889 struct drm_display_mode *desired_mode;
890 desired_mode = fb_helper->crtc_info[i].desired_mode;
894 gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size;
895 if (desired_mode->hdisplay < sizes.fb_width)
896 sizes.fb_width = desired_mode->hdisplay;
897 if (desired_mode->vdisplay < sizes.fb_height)
898 sizes.fb_height = desired_mode->vdisplay;
899 if (desired_mode->hdisplay > sizes.surface_width)
900 sizes.surface_width = desired_mode->hdisplay;
901 if (desired_mode->vdisplay > sizes.surface_height)
902 sizes.surface_height = desired_mode->vdisplay;
907 if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) {
908 /* hmm everyone went away - assume VGA cable just fell out
909 and will come back later. */
910 DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n");
911 sizes.fb_width = sizes.surface_width = 1024;
912 sizes.fb_height = sizes.surface_height = 768;
915 /* push down into drivers */
916 new_fb = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes);
920 info = fb_helper->fbdev;
922 /* set the fb pointer */
923 for (i = 0; i < fb_helper->crtc_count; i++) {
924 fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb;
928 info->var.pixclock = 0;
929 if (register_framebuffer(info) < 0) {
933 printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
937 drm_fb_helper_set_par(info);
940 /* Switch back to kernel console on panic */
941 /* multi card linked list maybe */
942 if (list_empty(&kernel_fb_helper_list)) {
943 printk(KERN_INFO "drm: registered panic notifier\n");
944 atomic_notifier_chain_register(&panic_notifier_list,
946 register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op);
949 list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list);
953 EXPORT_SYMBOL(drm_fb_helper_single_fb_probe);
955 void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
958 info->fix.type = FB_TYPE_PACKED_PIXELS;
959 info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR :
961 info->fix.type_aux = 0;
962 info->fix.xpanstep = 1; /* doing it in hw */
963 info->fix.ypanstep = 1; /* doing it in hw */
964 info->fix.ywrapstep = 0;
965 info->fix.accel = FB_ACCEL_NONE;
966 info->fix.type_aux = 0;
968 info->fix.line_length = pitch;
971 EXPORT_SYMBOL(drm_fb_helper_fill_fix);
973 void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper,
974 uint32_t fb_width, uint32_t fb_height)
976 struct drm_framebuffer *fb = fb_helper->fb;
977 info->pseudo_palette = fb_helper->pseudo_palette;
978 info->var.xres_virtual = fb->width;
979 info->var.yres_virtual = fb->height;
980 info->var.bits_per_pixel = fb->bits_per_pixel;
981 info->var.xoffset = 0;
982 info->var.yoffset = 0;
983 info->var.activate = FB_ACTIVATE_NOW;
984 info->var.height = -1;
985 info->var.width = -1;
989 info->var.red.offset = 0;
990 info->var.green.offset = 0;
991 info->var.blue.offset = 0;
992 info->var.red.length = 8; /* 8bit DAC */
993 info->var.green.length = 8;
994 info->var.blue.length = 8;
995 info->var.transp.offset = 0;
996 info->var.transp.length = 0;
999 info->var.red.offset = 10;
1000 info->var.green.offset = 5;
1001 info->var.blue.offset = 0;
1002 info->var.red.length = 5;
1003 info->var.green.length = 5;
1004 info->var.blue.length = 5;
1005 info->var.transp.offset = 15;
1006 info->var.transp.length = 1;
1009 info->var.red.offset = 11;
1010 info->var.green.offset = 5;
1011 info->var.blue.offset = 0;
1012 info->var.red.length = 5;
1013 info->var.green.length = 6;
1014 info->var.blue.length = 5;
1015 info->var.transp.offset = 0;
1018 info->var.red.offset = 16;
1019 info->var.green.offset = 8;
1020 info->var.blue.offset = 0;
1021 info->var.red.length = 8;
1022 info->var.green.length = 8;
1023 info->var.blue.length = 8;
1024 info->var.transp.offset = 0;
1025 info->var.transp.length = 0;
1028 info->var.red.offset = 16;
1029 info->var.green.offset = 8;
1030 info->var.blue.offset = 0;
1031 info->var.red.length = 8;
1032 info->var.green.length = 8;
1033 info->var.blue.length = 8;
1034 info->var.transp.offset = 24;
1035 info->var.transp.length = 8;
1041 info->var.xres = fb_width;
1042 info->var.yres = fb_height;
1044 EXPORT_SYMBOL(drm_fb_helper_fill_var);
1046 static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper,
1050 struct drm_connector *connector;
1054 for (i = 0; i < fb_helper->connector_count; i++) {
1055 connector = fb_helper->connector_info[i]->connector;
1056 count += connector->funcs->fill_modes(connector, maxX, maxY);
1062 static struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height)
1064 struct drm_display_mode *mode;
1066 list_for_each_entry(mode, &fb_connector->connector->modes, head) {
1067 if (drm_mode_width(mode) > width ||
1068 drm_mode_height(mode) > height)
1070 if (mode->type & DRM_MODE_TYPE_PREFERRED)
1076 static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector)
1078 struct drm_fb_helper_cmdline_mode *cmdline_mode;
1079 cmdline_mode = &fb_connector->cmdline_mode;
1080 return cmdline_mode->specified;
1083 static struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn,
1084 int width, int height)
1086 struct drm_fb_helper_cmdline_mode *cmdline_mode;
1087 struct drm_display_mode *mode = NULL;
1089 cmdline_mode = &fb_helper_conn->cmdline_mode;
1090 if (cmdline_mode->specified == false)
1093 /* attempt to find a matching mode in the list of modes
1094 * we have gotten so far, if not add a CVT mode that conforms
1096 if (cmdline_mode->rb || cmdline_mode->margins)
1099 list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) {
1100 /* check width/height */
1101 if (mode->hdisplay != cmdline_mode->xres ||
1102 mode->vdisplay != cmdline_mode->yres)
1105 if (cmdline_mode->refresh_specified) {
1106 if (mode->vrefresh != cmdline_mode->refresh)
1110 if (cmdline_mode->interlace) {
1111 if (!(mode->flags & DRM_MODE_FLAG_INTERLACE))
1118 if (cmdline_mode->cvt)
1119 mode = drm_cvt_mode(fb_helper_conn->connector->dev,
1120 cmdline_mode->xres, cmdline_mode->yres,
1121 cmdline_mode->refresh_specified ? cmdline_mode->refresh : 60,
1122 cmdline_mode->rb, cmdline_mode->interlace,
1123 cmdline_mode->margins);
1125 mode = drm_gtf_mode(fb_helper_conn->connector->dev,
1126 cmdline_mode->xres, cmdline_mode->yres,
1127 cmdline_mode->refresh_specified ? cmdline_mode->refresh : 60,
1128 cmdline_mode->interlace,
1129 cmdline_mode->margins);
1130 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
1131 list_add(&mode->head, &fb_helper_conn->connector->modes);
1135 static bool drm_connector_enabled(struct drm_connector *connector, bool strict)
1140 enable = connector->status == connector_status_connected;
1142 enable = connector->status != connector_status_disconnected;
1147 static void drm_enable_connectors(struct drm_fb_helper *fb_helper,
1150 bool any_enabled = false;
1151 struct drm_connector *connector;
1154 for (i = 0; i < fb_helper->connector_count; i++) {
1155 connector = fb_helper->connector_info[i]->connector;
1156 enabled[i] = drm_connector_enabled(connector, true);
1157 DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id,
1158 enabled[i] ? "yes" : "no");
1159 any_enabled |= enabled[i];
1165 for (i = 0; i < fb_helper->connector_count; i++) {
1166 connector = fb_helper->connector_info[i]->connector;
1167 enabled[i] = drm_connector_enabled(connector, false);
1171 static bool drm_target_cloned(struct drm_fb_helper *fb_helper,
1172 struct drm_display_mode **modes,
1173 bool *enabled, int width, int height)
1176 bool can_clone = false;
1177 struct drm_fb_helper_connector *fb_helper_conn;
1178 struct drm_display_mode *dmt_mode, *mode;
1180 /* only contemplate cloning in the single crtc case */
1181 if (fb_helper->crtc_count > 1)
1185 for (i = 0; i < fb_helper->connector_count; i++) {
1190 /* only contemplate cloning if more than one connector is enabled */
1194 /* check the command line or if nothing common pick 1024x768 */
1196 for (i = 0; i < fb_helper->connector_count; i++) {
1199 fb_helper_conn = fb_helper->connector_info[i];
1200 modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height);
1205 for (j = 0; j < i; j++) {
1208 if (!drm_mode_equal(modes[j], modes[i]))
1214 DRM_DEBUG_KMS("can clone using command line\n");
1218 /* try and find a 1024x768 mode on each connector */
1220 dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60);
1222 for (i = 0; i < fb_helper->connector_count; i++) {
1227 fb_helper_conn = fb_helper->connector_info[i];
1228 list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) {
1229 if (drm_mode_equal(mode, dmt_mode))
1237 DRM_DEBUG_KMS("can clone using 1024x768\n");
1240 DRM_INFO("kms: can't enable cloning when we probably wanted to.\n");
1244 static bool drm_target_preferred(struct drm_fb_helper *fb_helper,
1245 struct drm_display_mode **modes,
1246 bool *enabled, int width, int height)
1248 struct drm_fb_helper_connector *fb_helper_conn;
1251 for (i = 0; i < fb_helper->connector_count; i++) {
1252 fb_helper_conn = fb_helper->connector_info[i];
1254 if (enabled[i] == false)
1257 DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n",
1258 fb_helper_conn->connector->base.id);
1260 /* got for command line mode first */
1261 modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height);
1263 DRM_DEBUG_KMS("looking for preferred mode on connector %d\n",
1264 fb_helper_conn->connector->base.id);
1265 modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height);
1267 /* No preferred modes, pick one off the list */
1268 if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) {
1269 list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head)
1272 DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name :
1278 static int drm_pick_crtcs(struct drm_fb_helper *fb_helper,
1279 struct drm_fb_helper_crtc **best_crtcs,
1280 struct drm_display_mode **modes,
1281 int n, int width, int height)
1284 struct drm_device *dev = fb_helper->dev;
1285 struct drm_connector *connector;
1286 struct drm_connector_helper_funcs *connector_funcs;
1287 struct drm_encoder *encoder;
1288 struct drm_fb_helper_crtc *best_crtc;
1289 int my_score, best_score, score;
1290 struct drm_fb_helper_crtc **crtcs, *crtc;
1291 struct drm_fb_helper_connector *fb_helper_conn;
1293 if (n == fb_helper->connector_count)
1296 fb_helper_conn = fb_helper->connector_info[n];
1297 connector = fb_helper_conn->connector;
1299 best_crtcs[n] = NULL;
1301 best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height);
1302 if (modes[n] == NULL)
1305 crtcs = kzalloc(dev->mode_config.num_connector *
1306 sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL);
1311 if (connector->status == connector_status_connected)
1313 if (drm_has_cmdline_mode(fb_helper_conn))
1315 if (drm_has_preferred_mode(fb_helper_conn, width, height))
1318 connector_funcs = connector->helper_private;
1319 encoder = connector_funcs->best_encoder(connector);
1323 /* select a crtc for this connector and then attempt to configure
1324 remaining connectors */
1325 for (c = 0; c < fb_helper->crtc_count; c++) {
1326 crtc = &fb_helper->crtc_info[c];
1328 if ((encoder->possible_crtcs & (1 << c)) == 0) {
1332 for (o = 0; o < n; o++)
1333 if (best_crtcs[o] == crtc)
1337 /* ignore cloning unless only a single crtc */
1338 if (fb_helper->crtc_count > 1)
1341 if (!drm_mode_equal(modes[o], modes[n]))
1346 memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *));
1347 score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1,
1349 if (score > best_score) {
1352 memcpy(best_crtcs, crtcs,
1353 dev->mode_config.num_connector *
1354 sizeof(struct drm_fb_helper_crtc *));
1362 static void drm_setup_crtcs(struct drm_fb_helper *fb_helper)
1364 struct drm_device *dev = fb_helper->dev;
1365 struct drm_fb_helper_crtc **crtcs;
1366 struct drm_display_mode **modes;
1367 struct drm_encoder *encoder;
1368 struct drm_mode_set *modeset;
1373 DRM_DEBUG_KMS("\n");
1375 width = dev->mode_config.max_width;
1376 height = dev->mode_config.max_height;
1378 /* clean out all the encoder/crtc combos */
1379 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
1380 encoder->crtc = NULL;
1383 crtcs = kcalloc(dev->mode_config.num_connector,
1384 sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL);
1385 modes = kcalloc(dev->mode_config.num_connector,
1386 sizeof(struct drm_display_mode *), GFP_KERNEL);
1387 enabled = kcalloc(dev->mode_config.num_connector,
1388 sizeof(bool), GFP_KERNEL);
1390 drm_enable_connectors(fb_helper, enabled);
1392 ret = drm_target_cloned(fb_helper, modes, enabled, width, height);
1394 ret = drm_target_preferred(fb_helper, modes, enabled, width, height);
1396 DRM_ERROR("Unable to find initial modes\n");
1399 DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width, height);
1401 drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height);
1403 /* need to set the modesets up here for use later */
1404 /* fill out the connector<->crtc mappings into the modesets */
1405 for (i = 0; i < fb_helper->crtc_count; i++) {
1406 modeset = &fb_helper->crtc_info[i].mode_set;
1407 modeset->num_connectors = 0;
1410 for (i = 0; i < fb_helper->connector_count; i++) {
1411 struct drm_display_mode *mode = modes[i];
1412 struct drm_fb_helper_crtc *fb_crtc = crtcs[i];
1413 modeset = &fb_crtc->mode_set;
1415 if (mode && fb_crtc) {
1416 DRM_DEBUG_KMS("desired mode %s set on crtc %d\n",
1417 mode->name, fb_crtc->mode_set.crtc->base.id);
1418 fb_crtc->desired_mode = mode;
1420 drm_mode_destroy(dev, modeset->mode);
1421 modeset->mode = drm_mode_duplicate(dev,
1422 fb_crtc->desired_mode);
1423 modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector;
1433 * drm_helper_initial_config - setup a sane initial connector configuration
1437 * Called at init time, must take mode config lock.
1439 * Scan the CRTCs and connectors and try to put together an initial setup.
1440 * At the moment, this is a cloned configuration across all heads with
1441 * a new framebuffer object as the backing store.
1444 * Zero if everything went ok, nonzero otherwise.
1446 bool drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel)
1448 struct drm_device *dev = fb_helper->dev;
1451 /* disable all the possible outputs/crtcs before entering KMS mode */
1452 drm_helper_disable_unused_functions(fb_helper->dev);
1454 drm_fb_helper_parse_command_line(fb_helper);
1456 count = drm_fb_helper_probe_connector_modes(fb_helper,
1457 dev->mode_config.max_width,
1458 dev->mode_config.max_height);
1460 * we shouldn't end up with no modes here.
1463 printk(KERN_INFO "No connectors reported connected with modes\n");
1465 drm_setup_crtcs(fb_helper);
1467 return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
1469 EXPORT_SYMBOL(drm_fb_helper_initial_config);
1471 bool drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper)
1474 u32 max_width, max_height, bpp_sel;
1475 bool bound = false, crtcs_bound = false;
1476 struct drm_crtc *crtc;
1481 list_for_each_entry(crtc, &fb_helper->dev->mode_config.crtc_list, head) {
1484 if (crtc->fb == fb_helper->fb)
1488 if (!bound && crtcs_bound) {
1489 fb_helper->delayed_hotplug = true;
1492 DRM_DEBUG_KMS("\n");
1494 max_width = fb_helper->fb->width;
1495 max_height = fb_helper->fb->height;
1496 bpp_sel = fb_helper->fb->bits_per_pixel;
1498 count = drm_fb_helper_probe_connector_modes(fb_helper, max_width,
1500 drm_setup_crtcs(fb_helper);
1502 return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
1504 EXPORT_SYMBOL(drm_fb_helper_hotplug_event);