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;
101 connector = fb_helper_conn->connector;
103 cmdline_mode = &fb_helper_conn->cmdline_mode;
105 mode_option = fb_mode_option;
108 cmdline_mode->specified = false;
113 namelen = strlen(name);
114 for (i = namelen-1; i >= 0; i--) {
118 if (!refresh_specified && !bpp_specified &&
120 refresh = simple_strtol(&name[i+1], NULL, 10);
121 refresh_specified = 1;
129 if (!bpp_specified && !yres_specified) {
130 bpp = simple_strtol(&name[i+1], NULL, 10);
138 if (!yres_specified) {
139 yres = simple_strtol(&name[i+1], NULL, 10);
162 force = DRM_FORCE_ON;
165 if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) &&
166 (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB))
167 force = DRM_FORCE_ON;
169 force = DRM_FORCE_ON_DIGITAL;
172 force = DRM_FORCE_OFF;
178 if (i < 0 && yres_specified) {
179 xres = simple_strtol(name, NULL, 10);
184 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n",
185 drm_get_connector_name(connector), xres, yres,
186 (refresh) ? refresh : 60, (rb) ? " reduced blanking" :
187 "", (margins) ? " with margins" : "", (interlace) ?
193 case DRM_FORCE_OFF: s = "OFF"; break;
194 case DRM_FORCE_ON_DIGITAL: s = "ON - dig"; break;
196 case DRM_FORCE_ON: s = "ON"; break;
199 DRM_INFO("forcing %s connector %s\n",
200 drm_get_connector_name(connector), s);
201 connector->force = force;
205 cmdline_mode->specified = true;
206 cmdline_mode->xres = xres;
207 cmdline_mode->yres = yres;
210 if (refresh_specified) {
211 cmdline_mode->refresh_specified = true;
212 cmdline_mode->refresh = refresh;
216 cmdline_mode->bpp_specified = true;
217 cmdline_mode->bpp = bpp;
219 cmdline_mode->rb = rb ? true : false;
220 cmdline_mode->cvt = cvt ? true : false;
221 cmdline_mode->interlace = interlace ? true : false;
226 static int drm_fb_helper_parse_command_line(struct drm_fb_helper *fb_helper)
228 struct drm_fb_helper_connector *fb_helper_conn;
231 for (i = 0; i < fb_helper->connector_count; i++) {
234 fb_helper_conn = fb_helper->connector_info[i];
236 /* do something on return - turn off connector maybe */
237 if (fb_get_options(drm_get_connector_name(fb_helper_conn->connector), &option))
240 drm_fb_helper_connector_parse_command_line(fb_helper_conn, option);
245 static void drm_fb_helper_save_lut_atomic(struct drm_crtc *crtc, struct drm_fb_helper *helper)
247 uint16_t *r_base, *g_base, *b_base;
250 r_base = crtc->gamma_store;
251 g_base = r_base + crtc->gamma_size;
252 b_base = g_base + crtc->gamma_size;
254 for (i = 0; i < crtc->gamma_size; i++)
255 helper->funcs->gamma_get(crtc, &r_base[i], &g_base[i], &b_base[i], i);
258 static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc)
260 uint16_t *r_base, *g_base, *b_base;
262 r_base = crtc->gamma_store;
263 g_base = r_base + crtc->gamma_size;
264 b_base = g_base + crtc->gamma_size;
266 crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size);
269 int drm_fb_helper_debug_enter(struct fb_info *info)
271 struct drm_fb_helper *helper = info->par;
272 struct drm_crtc_helper_funcs *funcs;
275 if (list_empty(&kernel_fb_helper_list))
278 list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) {
279 for (i = 0; i < helper->crtc_count; i++) {
280 struct drm_mode_set *mode_set =
281 &helper->crtc_info[i].mode_set;
283 if (!mode_set->crtc->enabled)
286 funcs = mode_set->crtc->helper_private;
287 drm_fb_helper_save_lut_atomic(mode_set->crtc, helper);
288 funcs->mode_set_base_atomic(mode_set->crtc,
292 ENTER_ATOMIC_MODE_SET);
298 EXPORT_SYMBOL(drm_fb_helper_debug_enter);
300 /* Find the real fb for a given fb helper CRTC */
301 static struct drm_framebuffer *drm_mode_config_fb(struct drm_crtc *crtc)
303 struct drm_device *dev = crtc->dev;
306 list_for_each_entry(c, &dev->mode_config.crtc_list, head) {
307 if (crtc->base.id == c->base.id)
314 int drm_fb_helper_debug_leave(struct fb_info *info)
316 struct drm_fb_helper *helper = info->par;
317 struct drm_crtc *crtc;
318 struct drm_crtc_helper_funcs *funcs;
319 struct drm_framebuffer *fb;
322 for (i = 0; i < helper->crtc_count; i++) {
323 struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set;
324 crtc = mode_set->crtc;
325 funcs = crtc->helper_private;
326 fb = drm_mode_config_fb(crtc);
332 DRM_ERROR("no fb to restore??\n");
336 drm_fb_helper_restore_lut_atomic(mode_set->crtc);
337 funcs->mode_set_base_atomic(mode_set->crtc, fb, crtc->x,
338 crtc->y, LEAVE_ATOMIC_MODE_SET);
343 EXPORT_SYMBOL(drm_fb_helper_debug_leave);
345 bool drm_fb_helper_restore_fbdev_mode(struct drm_fb_helper *fb_helper)
349 for (i = 0; i < fb_helper->crtc_count; i++) {
350 struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set;
351 ret = drm_crtc_helper_set_config(mode_set);
357 EXPORT_SYMBOL(drm_fb_helper_restore_fbdev_mode);
359 bool drm_fb_helper_force_kernel_mode(void)
361 bool ret, error = false;
362 struct drm_fb_helper *helper;
364 if (list_empty(&kernel_fb_helper_list))
367 list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) {
368 if (helper->dev->switch_power_state == DRM_SWITCH_POWER_OFF)
371 ret = drm_fb_helper_restore_fbdev_mode(helper);
378 int drm_fb_helper_panic(struct notifier_block *n, unsigned long ununsed,
381 printk(KERN_ERR "panic occurred, switching back to text console\n");
382 return drm_fb_helper_force_kernel_mode();
385 EXPORT_SYMBOL(drm_fb_helper_panic);
387 static struct notifier_block paniced = {
388 .notifier_call = drm_fb_helper_panic,
392 * drm_fb_helper_restore - restore the framebuffer console (kernel) config
394 * Restore's the kernel's fbcon mode, used for lastclose & panic paths.
396 void drm_fb_helper_restore(void)
399 ret = drm_fb_helper_force_kernel_mode();
401 DRM_ERROR("Failed to restore crtc configuration\n");
403 EXPORT_SYMBOL(drm_fb_helper_restore);
405 #ifdef CONFIG_MAGIC_SYSRQ
406 static void drm_fb_helper_restore_work_fn(struct work_struct *ignored)
408 drm_fb_helper_restore();
410 static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn);
412 static void drm_fb_helper_sysrq(int dummy1)
414 schedule_work(&drm_fb_helper_restore_work);
417 static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = {
418 .handler = drm_fb_helper_sysrq,
419 .help_msg = "force-fb(V)",
420 .action_msg = "Restore framebuffer console",
423 static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { };
426 static void drm_fb_helper_on(struct fb_info *info)
428 struct drm_fb_helper *fb_helper = info->par;
429 struct drm_device *dev = fb_helper->dev;
430 struct drm_crtc *crtc;
431 struct drm_crtc_helper_funcs *crtc_funcs;
432 struct drm_connector *connector;
433 struct drm_encoder *encoder;
437 * For each CRTC in this fb, turn the crtc on then,
438 * find all associated encoders and turn them on.
440 mutex_lock(&dev->mode_config.mutex);
441 for (i = 0; i < fb_helper->crtc_count; i++) {
442 crtc = fb_helper->crtc_info[i].mode_set.crtc;
443 crtc_funcs = crtc->helper_private;
448 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
450 /* Walk the connectors & encoders on this fb turning them on */
451 for (j = 0; j < fb_helper->connector_count; j++) {
452 connector = fb_helper->connector_info[j]->connector;
453 connector->dpms = DRM_MODE_DPMS_ON;
454 drm_connector_property_set_value(connector,
455 dev->mode_config.dpms_property,
458 /* Found a CRTC on this fb, now find encoders */
459 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
460 if (encoder->crtc == crtc) {
461 struct drm_encoder_helper_funcs *encoder_funcs;
463 encoder_funcs = encoder->helper_private;
464 encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
468 mutex_unlock(&dev->mode_config.mutex);
471 static void drm_fb_helper_off(struct fb_info *info, int dpms_mode)
473 struct drm_fb_helper *fb_helper = info->par;
474 struct drm_device *dev = fb_helper->dev;
475 struct drm_crtc *crtc;
476 struct drm_crtc_helper_funcs *crtc_funcs;
477 struct drm_connector *connector;
478 struct drm_encoder *encoder;
482 * For each CRTC in this fb, find all associated encoders
483 * and turn them off, then turn off the CRTC.
485 mutex_lock(&dev->mode_config.mutex);
486 for (i = 0; i < fb_helper->crtc_count; i++) {
487 crtc = fb_helper->crtc_info[i].mode_set.crtc;
488 crtc_funcs = crtc->helper_private;
493 /* Walk the connectors on this fb and mark them off */
494 for (j = 0; j < fb_helper->connector_count; j++) {
495 connector = fb_helper->connector_info[j]->connector;
496 connector->dpms = dpms_mode;
497 drm_connector_property_set_value(connector,
498 dev->mode_config.dpms_property,
501 /* Found a CRTC on this fb, now find encoders */
502 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
503 if (encoder->crtc == crtc) {
504 struct drm_encoder_helper_funcs *encoder_funcs;
506 encoder_funcs = encoder->helper_private;
507 encoder_funcs->dpms(encoder, dpms_mode);
510 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
512 mutex_unlock(&dev->mode_config.mutex);
515 int drm_fb_helper_blank(int blank, struct fb_info *info)
518 /* Display: On; HSync: On, VSync: On */
519 case FB_BLANK_UNBLANK:
520 drm_fb_helper_on(info);
522 /* Display: Off; HSync: On, VSync: On */
523 case FB_BLANK_NORMAL:
524 drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
526 /* Display: Off; HSync: Off, VSync: On */
527 case FB_BLANK_HSYNC_SUSPEND:
528 drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
530 /* Display: Off; HSync: On, VSync: Off */
531 case FB_BLANK_VSYNC_SUSPEND:
532 drm_fb_helper_off(info, DRM_MODE_DPMS_SUSPEND);
534 /* Display: Off; HSync: Off, VSync: Off */
535 case FB_BLANK_POWERDOWN:
536 drm_fb_helper_off(info, DRM_MODE_DPMS_OFF);
541 EXPORT_SYMBOL(drm_fb_helper_blank);
543 static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper)
547 for (i = 0; i < helper->connector_count; i++)
548 kfree(helper->connector_info[i]);
549 kfree(helper->connector_info);
550 for (i = 0; i < helper->crtc_count; i++)
551 kfree(helper->crtc_info[i].mode_set.connectors);
552 kfree(helper->crtc_info);
555 int drm_fb_helper_init(struct drm_device *dev,
556 struct drm_fb_helper *fb_helper,
557 int crtc_count, int max_conn_count)
559 struct drm_crtc *crtc;
563 fb_helper->dev = dev;
565 INIT_LIST_HEAD(&fb_helper->kernel_fb_list);
567 fb_helper->crtc_info = kcalloc(crtc_count, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL);
568 if (!fb_helper->crtc_info)
571 fb_helper->crtc_count = crtc_count;
572 fb_helper->connector_info = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_fb_helper_connector *), GFP_KERNEL);
573 if (!fb_helper->connector_info) {
574 kfree(fb_helper->crtc_info);
577 fb_helper->connector_count = 0;
579 for (i = 0; i < crtc_count; i++) {
580 fb_helper->crtc_info[i].mode_set.connectors =
581 kcalloc(max_conn_count,
582 sizeof(struct drm_connector *),
585 if (!fb_helper->crtc_info[i].mode_set.connectors) {
589 fb_helper->crtc_info[i].mode_set.num_connectors = 0;
593 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
594 fb_helper->crtc_info[i].crtc_id = crtc->base.id;
595 fb_helper->crtc_info[i].mode_set.crtc = crtc;
598 fb_helper->conn_limit = max_conn_count;
601 drm_fb_helper_crtc_free(fb_helper);
604 EXPORT_SYMBOL(drm_fb_helper_init);
606 void drm_fb_helper_fini(struct drm_fb_helper *fb_helper)
608 if (!list_empty(&fb_helper->kernel_fb_list)) {
609 list_del(&fb_helper->kernel_fb_list);
610 if (list_empty(&kernel_fb_helper_list)) {
611 printk(KERN_INFO "drm: unregistered panic notifier\n");
612 atomic_notifier_chain_unregister(&panic_notifier_list,
614 unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op);
618 drm_fb_helper_crtc_free(fb_helper);
621 EXPORT_SYMBOL(drm_fb_helper_fini);
623 static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green,
624 u16 blue, u16 regno, struct fb_info *info)
626 struct drm_fb_helper *fb_helper = info->par;
627 struct drm_framebuffer *fb = fb_helper->fb;
630 if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
633 /* place color in psuedopalette */
636 palette = (u32 *)info->pseudo_palette;
637 red >>= (16 - info->var.red.length);
638 green >>= (16 - info->var.green.length);
639 blue >>= (16 - info->var.blue.length);
640 value = (red << info->var.red.offset) |
641 (green << info->var.green.offset) |
642 (blue << info->var.blue.offset);
643 palette[regno] = value;
649 if (fb->bits_per_pixel == 16) {
652 if (fb->depth == 16 && regno > 63)
654 if (fb->depth == 15 && regno > 31)
657 if (fb->depth == 16) {
661 for (i = 0; i < 8; i++)
662 fb_helper->funcs->gamma_set(crtc, red,
663 green, blue, pindex + i);
666 fb_helper->funcs->gamma_get(crtc, &r,
670 for (i = 0; i < 4; i++)
671 fb_helper->funcs->gamma_set(crtc, r,
678 fb_helper->funcs->gamma_set(crtc, red, green, blue, pindex);
682 int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info)
684 struct drm_fb_helper *fb_helper = info->par;
685 struct drm_crtc_helper_funcs *crtc_funcs;
686 u16 *red, *green, *blue, *transp;
687 struct drm_crtc *crtc;
691 for (i = 0; i < fb_helper->crtc_count; i++) {
692 crtc = fb_helper->crtc_info[i].mode_set.crtc;
693 crtc_funcs = crtc->helper_private;
698 transp = cmap->transp;
701 for (j = 0; j < cmap->len; j++) {
702 u16 hred, hgreen, hblue, htransp = 0xffff;
711 rc = setcolreg(crtc, hred, hgreen, hblue, start++, info);
715 crtc_funcs->load_lut(crtc);
719 EXPORT_SYMBOL(drm_fb_helper_setcmap);
721 int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
722 struct fb_info *info)
724 struct drm_fb_helper *fb_helper = info->par;
725 struct drm_framebuffer *fb = fb_helper->fb;
728 if (var->pixclock != 0 || in_dbg_master())
731 /* Need to resize the fb object !!! */
732 if (var->bits_per_pixel > fb->bits_per_pixel || var->xres > fb->width || var->yres > fb->height) {
733 DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb "
734 "object %dx%d-%d > %dx%d-%d\n", var->xres, var->yres, var->bits_per_pixel,
735 fb->width, fb->height, fb->bits_per_pixel);
739 switch (var->bits_per_pixel) {
741 depth = (var->green.length == 6) ? 16 : 15;
744 depth = (var->transp.length > 0) ? 32 : 24;
747 depth = var->bits_per_pixel;
754 var->green.offset = 0;
755 var->blue.offset = 0;
757 var->green.length = 8;
758 var->blue.length = 8;
759 var->transp.length = 0;
760 var->transp.offset = 0;
763 var->red.offset = 10;
764 var->green.offset = 5;
765 var->blue.offset = 0;
767 var->green.length = 5;
768 var->blue.length = 5;
769 var->transp.length = 1;
770 var->transp.offset = 15;
773 var->red.offset = 11;
774 var->green.offset = 5;
775 var->blue.offset = 0;
777 var->green.length = 6;
778 var->blue.length = 5;
779 var->transp.length = 0;
780 var->transp.offset = 0;
783 var->red.offset = 16;
784 var->green.offset = 8;
785 var->blue.offset = 0;
787 var->green.length = 8;
788 var->blue.length = 8;
789 var->transp.length = 0;
790 var->transp.offset = 0;
793 var->red.offset = 16;
794 var->green.offset = 8;
795 var->blue.offset = 0;
797 var->green.length = 8;
798 var->blue.length = 8;
799 var->transp.length = 8;
800 var->transp.offset = 24;
807 EXPORT_SYMBOL(drm_fb_helper_check_var);
809 /* this will let fbcon do the mode init */
810 int drm_fb_helper_set_par(struct fb_info *info)
812 struct drm_fb_helper *fb_helper = info->par;
813 struct drm_device *dev = fb_helper->dev;
814 struct fb_var_screeninfo *var = &info->var;
815 struct drm_crtc *crtc;
819 if (var->pixclock != 0) {
820 DRM_ERROR("PIXEL CLOCK SET\n");
824 mutex_lock(&dev->mode_config.mutex);
825 for (i = 0; i < fb_helper->crtc_count; i++) {
826 crtc = fb_helper->crtc_info[i].mode_set.crtc;
827 ret = crtc->funcs->set_config(&fb_helper->crtc_info[i].mode_set);
829 mutex_unlock(&dev->mode_config.mutex);
833 mutex_unlock(&dev->mode_config.mutex);
835 if (fb_helper->delayed_hotplug) {
836 fb_helper->delayed_hotplug = false;
837 drm_fb_helper_hotplug_event(fb_helper);
841 EXPORT_SYMBOL(drm_fb_helper_set_par);
843 int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
844 struct fb_info *info)
846 struct drm_fb_helper *fb_helper = info->par;
847 struct drm_device *dev = fb_helper->dev;
848 struct drm_mode_set *modeset;
849 struct drm_crtc *crtc;
853 mutex_lock(&dev->mode_config.mutex);
854 for (i = 0; i < fb_helper->crtc_count; i++) {
855 crtc = fb_helper->crtc_info[i].mode_set.crtc;
857 modeset = &fb_helper->crtc_info[i].mode_set;
859 modeset->x = var->xoffset;
860 modeset->y = var->yoffset;
862 if (modeset->num_connectors) {
863 ret = crtc->funcs->set_config(modeset);
865 info->var.xoffset = var->xoffset;
866 info->var.yoffset = var->yoffset;
870 mutex_unlock(&dev->mode_config.mutex);
873 EXPORT_SYMBOL(drm_fb_helper_pan_display);
875 int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper,
881 struct fb_info *info;
882 struct drm_fb_helper_surface_size sizes;
885 memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size));
886 sizes.surface_depth = 24;
887 sizes.surface_bpp = 32;
888 sizes.fb_width = (unsigned)-1;
889 sizes.fb_height = (unsigned)-1;
891 /* if driver picks 8 or 16 by default use that
892 for both depth/bpp */
893 if (preferred_bpp != sizes.surface_bpp) {
894 sizes.surface_depth = sizes.surface_bpp = preferred_bpp;
896 /* first up get a count of crtcs now in use and new min/maxes width/heights */
897 for (i = 0; i < fb_helper->connector_count; i++) {
898 struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i];
899 struct drm_fb_helper_cmdline_mode *cmdline_mode;
901 cmdline_mode = &fb_helper_conn->cmdline_mode;
903 if (cmdline_mode->bpp_specified) {
904 switch (cmdline_mode->bpp) {
906 sizes.surface_depth = sizes.surface_bpp = 8;
909 sizes.surface_depth = 15;
910 sizes.surface_bpp = 16;
913 sizes.surface_depth = sizes.surface_bpp = 16;
916 sizes.surface_depth = sizes.surface_bpp = 24;
919 sizes.surface_depth = 24;
920 sizes.surface_bpp = 32;
928 for (i = 0; i < fb_helper->crtc_count; i++) {
929 struct drm_display_mode *desired_mode;
930 desired_mode = fb_helper->crtc_info[i].desired_mode;
934 gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size;
935 if (desired_mode->hdisplay < sizes.fb_width)
936 sizes.fb_width = desired_mode->hdisplay;
937 if (desired_mode->vdisplay < sizes.fb_height)
938 sizes.fb_height = desired_mode->vdisplay;
939 if (desired_mode->hdisplay > sizes.surface_width)
940 sizes.surface_width = desired_mode->hdisplay;
941 if (desired_mode->vdisplay > sizes.surface_height)
942 sizes.surface_height = desired_mode->vdisplay;
947 if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) {
948 /* hmm everyone went away - assume VGA cable just fell out
949 and will come back later. */
950 DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n");
951 sizes.fb_width = sizes.surface_width = 1024;
952 sizes.fb_height = sizes.surface_height = 768;
955 /* push down into drivers */
956 new_fb = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes);
960 info = fb_helper->fbdev;
962 /* set the fb pointer */
963 for (i = 0; i < fb_helper->crtc_count; i++) {
964 fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb;
968 info->var.pixclock = 0;
969 if (register_framebuffer(info) < 0) {
973 printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
977 drm_fb_helper_set_par(info);
980 /* Switch back to kernel console on panic */
981 /* multi card linked list maybe */
982 if (list_empty(&kernel_fb_helper_list)) {
983 printk(KERN_INFO "drm: registered panic notifier\n");
984 atomic_notifier_chain_register(&panic_notifier_list,
986 register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op);
989 list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list);
993 EXPORT_SYMBOL(drm_fb_helper_single_fb_probe);
995 void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
998 info->fix.type = FB_TYPE_PACKED_PIXELS;
999 info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR :
1000 FB_VISUAL_TRUECOLOR;
1001 info->fix.mmio_start = 0;
1002 info->fix.mmio_len = 0;
1003 info->fix.type_aux = 0;
1004 info->fix.xpanstep = 1; /* doing it in hw */
1005 info->fix.ypanstep = 1; /* doing it in hw */
1006 info->fix.ywrapstep = 0;
1007 info->fix.accel = FB_ACCEL_NONE;
1008 info->fix.type_aux = 0;
1010 info->fix.line_length = pitch;
1013 EXPORT_SYMBOL(drm_fb_helper_fill_fix);
1015 void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper,
1016 uint32_t fb_width, uint32_t fb_height)
1018 struct drm_framebuffer *fb = fb_helper->fb;
1019 info->pseudo_palette = fb_helper->pseudo_palette;
1020 info->var.xres_virtual = fb->width;
1021 info->var.yres_virtual = fb->height;
1022 info->var.bits_per_pixel = fb->bits_per_pixel;
1023 info->var.accel_flags = FB_ACCELF_TEXT;
1024 info->var.xoffset = 0;
1025 info->var.yoffset = 0;
1026 info->var.activate = FB_ACTIVATE_NOW;
1027 info->var.height = -1;
1028 info->var.width = -1;
1030 switch (fb->depth) {
1032 info->var.red.offset = 0;
1033 info->var.green.offset = 0;
1034 info->var.blue.offset = 0;
1035 info->var.red.length = 8; /* 8bit DAC */
1036 info->var.green.length = 8;
1037 info->var.blue.length = 8;
1038 info->var.transp.offset = 0;
1039 info->var.transp.length = 0;
1042 info->var.red.offset = 10;
1043 info->var.green.offset = 5;
1044 info->var.blue.offset = 0;
1045 info->var.red.length = 5;
1046 info->var.green.length = 5;
1047 info->var.blue.length = 5;
1048 info->var.transp.offset = 15;
1049 info->var.transp.length = 1;
1052 info->var.red.offset = 11;
1053 info->var.green.offset = 5;
1054 info->var.blue.offset = 0;
1055 info->var.red.length = 5;
1056 info->var.green.length = 6;
1057 info->var.blue.length = 5;
1058 info->var.transp.offset = 0;
1061 info->var.red.offset = 16;
1062 info->var.green.offset = 8;
1063 info->var.blue.offset = 0;
1064 info->var.red.length = 8;
1065 info->var.green.length = 8;
1066 info->var.blue.length = 8;
1067 info->var.transp.offset = 0;
1068 info->var.transp.length = 0;
1071 info->var.red.offset = 16;
1072 info->var.green.offset = 8;
1073 info->var.blue.offset = 0;
1074 info->var.red.length = 8;
1075 info->var.green.length = 8;
1076 info->var.blue.length = 8;
1077 info->var.transp.offset = 24;
1078 info->var.transp.length = 8;
1084 info->var.xres = fb_width;
1085 info->var.yres = fb_height;
1087 EXPORT_SYMBOL(drm_fb_helper_fill_var);
1089 static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper,
1093 struct drm_connector *connector;
1097 for (i = 0; i < fb_helper->connector_count; i++) {
1098 connector = fb_helper->connector_info[i]->connector;
1099 count += connector->funcs->fill_modes(connector, maxX, maxY);
1105 static struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height)
1107 struct drm_display_mode *mode;
1109 list_for_each_entry(mode, &fb_connector->connector->modes, head) {
1110 if (drm_mode_width(mode) > width ||
1111 drm_mode_height(mode) > height)
1113 if (mode->type & DRM_MODE_TYPE_PREFERRED)
1119 static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector)
1121 struct drm_fb_helper_cmdline_mode *cmdline_mode;
1122 cmdline_mode = &fb_connector->cmdline_mode;
1123 return cmdline_mode->specified;
1126 static struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn,
1127 int width, int height)
1129 struct drm_fb_helper_cmdline_mode *cmdline_mode;
1130 struct drm_display_mode *mode = NULL;
1132 cmdline_mode = &fb_helper_conn->cmdline_mode;
1133 if (cmdline_mode->specified == false)
1136 /* attempt to find a matching mode in the list of modes
1137 * we have gotten so far, if not add a CVT mode that conforms
1139 if (cmdline_mode->rb || cmdline_mode->margins)
1142 list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) {
1143 /* check width/height */
1144 if (mode->hdisplay != cmdline_mode->xres ||
1145 mode->vdisplay != cmdline_mode->yres)
1148 if (cmdline_mode->refresh_specified) {
1149 if (mode->vrefresh != cmdline_mode->refresh)
1153 if (cmdline_mode->interlace) {
1154 if (!(mode->flags & DRM_MODE_FLAG_INTERLACE))
1161 if (cmdline_mode->cvt)
1162 mode = drm_cvt_mode(fb_helper_conn->connector->dev,
1163 cmdline_mode->xres, cmdline_mode->yres,
1164 cmdline_mode->refresh_specified ? cmdline_mode->refresh : 60,
1165 cmdline_mode->rb, cmdline_mode->interlace,
1166 cmdline_mode->margins);
1168 mode = drm_gtf_mode(fb_helper_conn->connector->dev,
1169 cmdline_mode->xres, cmdline_mode->yres,
1170 cmdline_mode->refresh_specified ? cmdline_mode->refresh : 60,
1171 cmdline_mode->interlace,
1172 cmdline_mode->margins);
1173 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
1174 list_add(&mode->head, &fb_helper_conn->connector->modes);
1178 static bool drm_connector_enabled(struct drm_connector *connector, bool strict)
1183 enable = connector->status == connector_status_connected;
1185 enable = connector->status != connector_status_disconnected;
1190 static void drm_enable_connectors(struct drm_fb_helper *fb_helper,
1193 bool any_enabled = false;
1194 struct drm_connector *connector;
1197 for (i = 0; i < fb_helper->connector_count; i++) {
1198 connector = fb_helper->connector_info[i]->connector;
1199 enabled[i] = drm_connector_enabled(connector, true);
1200 DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id,
1201 enabled[i] ? "yes" : "no");
1202 any_enabled |= enabled[i];
1208 for (i = 0; i < fb_helper->connector_count; i++) {
1209 connector = fb_helper->connector_info[i]->connector;
1210 enabled[i] = drm_connector_enabled(connector, false);
1214 static bool drm_target_cloned(struct drm_fb_helper *fb_helper,
1215 struct drm_display_mode **modes,
1216 bool *enabled, int width, int height)
1219 bool can_clone = false;
1220 struct drm_fb_helper_connector *fb_helper_conn;
1221 struct drm_display_mode *dmt_mode, *mode;
1223 /* only contemplate cloning in the single crtc case */
1224 if (fb_helper->crtc_count > 1)
1228 for (i = 0; i < fb_helper->connector_count; i++) {
1233 /* only contemplate cloning if more than one connector is enabled */
1237 /* check the command line or if nothing common pick 1024x768 */
1239 for (i = 0; i < fb_helper->connector_count; i++) {
1242 fb_helper_conn = fb_helper->connector_info[i];
1243 modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height);
1248 for (j = 0; j < i; j++) {
1251 if (!drm_mode_equal(modes[j], modes[i]))
1257 DRM_DEBUG_KMS("can clone using command line\n");
1261 /* try and find a 1024x768 mode on each connector */
1263 dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60);
1265 for (i = 0; i < fb_helper->connector_count; i++) {
1270 fb_helper_conn = fb_helper->connector_info[i];
1271 list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) {
1272 if (drm_mode_equal(mode, dmt_mode))
1280 DRM_DEBUG_KMS("can clone using 1024x768\n");
1283 DRM_INFO("kms: can't enable cloning when we probably wanted to.\n");
1287 static bool drm_target_preferred(struct drm_fb_helper *fb_helper,
1288 struct drm_display_mode **modes,
1289 bool *enabled, int width, int height)
1291 struct drm_fb_helper_connector *fb_helper_conn;
1294 for (i = 0; i < fb_helper->connector_count; i++) {
1295 fb_helper_conn = fb_helper->connector_info[i];
1297 if (enabled[i] == false)
1300 DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n",
1301 fb_helper_conn->connector->base.id);
1303 /* got for command line mode first */
1304 modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height);
1306 DRM_DEBUG_KMS("looking for preferred mode on connector %d\n",
1307 fb_helper_conn->connector->base.id);
1308 modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height);
1310 /* No preferred modes, pick one off the list */
1311 if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) {
1312 list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head)
1315 DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name :
1321 static int drm_pick_crtcs(struct drm_fb_helper *fb_helper,
1322 struct drm_fb_helper_crtc **best_crtcs,
1323 struct drm_display_mode **modes,
1324 int n, int width, int height)
1327 struct drm_device *dev = fb_helper->dev;
1328 struct drm_connector *connector;
1329 struct drm_connector_helper_funcs *connector_funcs;
1330 struct drm_encoder *encoder;
1331 struct drm_fb_helper_crtc *best_crtc;
1332 int my_score, best_score, score;
1333 struct drm_fb_helper_crtc **crtcs, *crtc;
1334 struct drm_fb_helper_connector *fb_helper_conn;
1336 if (n == fb_helper->connector_count)
1339 fb_helper_conn = fb_helper->connector_info[n];
1340 connector = fb_helper_conn->connector;
1342 best_crtcs[n] = NULL;
1344 best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height);
1345 if (modes[n] == NULL)
1348 crtcs = kzalloc(dev->mode_config.num_connector *
1349 sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL);
1354 if (connector->status == connector_status_connected)
1356 if (drm_has_cmdline_mode(fb_helper_conn))
1358 if (drm_has_preferred_mode(fb_helper_conn, width, height))
1361 connector_funcs = connector->helper_private;
1362 encoder = connector_funcs->best_encoder(connector);
1366 /* select a crtc for this connector and then attempt to configure
1367 remaining connectors */
1368 for (c = 0; c < fb_helper->crtc_count; c++) {
1369 crtc = &fb_helper->crtc_info[c];
1371 if ((encoder->possible_crtcs & (1 << c)) == 0) {
1375 for (o = 0; o < n; o++)
1376 if (best_crtcs[o] == crtc)
1380 /* ignore cloning unless only a single crtc */
1381 if (fb_helper->crtc_count > 1)
1384 if (!drm_mode_equal(modes[o], modes[n]))
1389 memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *));
1390 score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1,
1392 if (score > best_score) {
1395 memcpy(best_crtcs, crtcs,
1396 dev->mode_config.num_connector *
1397 sizeof(struct drm_fb_helper_crtc *));
1405 static void drm_setup_crtcs(struct drm_fb_helper *fb_helper)
1407 struct drm_device *dev = fb_helper->dev;
1408 struct drm_fb_helper_crtc **crtcs;
1409 struct drm_display_mode **modes;
1410 struct drm_encoder *encoder;
1411 struct drm_mode_set *modeset;
1416 DRM_DEBUG_KMS("\n");
1418 width = dev->mode_config.max_width;
1419 height = dev->mode_config.max_height;
1421 /* clean out all the encoder/crtc combos */
1422 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
1423 encoder->crtc = NULL;
1426 crtcs = kcalloc(dev->mode_config.num_connector,
1427 sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL);
1428 modes = kcalloc(dev->mode_config.num_connector,
1429 sizeof(struct drm_display_mode *), GFP_KERNEL);
1430 enabled = kcalloc(dev->mode_config.num_connector,
1431 sizeof(bool), GFP_KERNEL);
1433 drm_enable_connectors(fb_helper, enabled);
1435 ret = drm_target_cloned(fb_helper, modes, enabled, width, height);
1437 ret = drm_target_preferred(fb_helper, modes, enabled, width, height);
1439 DRM_ERROR("Unable to find initial modes\n");
1442 DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width, height);
1444 drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height);
1446 /* need to set the modesets up here for use later */
1447 /* fill out the connector<->crtc mappings into the modesets */
1448 for (i = 0; i < fb_helper->crtc_count; i++) {
1449 modeset = &fb_helper->crtc_info[i].mode_set;
1450 modeset->num_connectors = 0;
1453 for (i = 0; i < fb_helper->connector_count; i++) {
1454 struct drm_display_mode *mode = modes[i];
1455 struct drm_fb_helper_crtc *fb_crtc = crtcs[i];
1456 modeset = &fb_crtc->mode_set;
1458 if (mode && fb_crtc) {
1459 DRM_DEBUG_KMS("desired mode %s set on crtc %d\n",
1460 mode->name, fb_crtc->mode_set.crtc->base.id);
1461 fb_crtc->desired_mode = mode;
1463 drm_mode_destroy(dev, modeset->mode);
1464 modeset->mode = drm_mode_duplicate(dev,
1465 fb_crtc->desired_mode);
1466 modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector;
1476 * drm_helper_initial_config - setup a sane initial connector configuration
1480 * Called at init time, must take mode config lock.
1482 * Scan the CRTCs and connectors and try to put together an initial setup.
1483 * At the moment, this is a cloned configuration across all heads with
1484 * a new framebuffer object as the backing store.
1487 * Zero if everything went ok, nonzero otherwise.
1489 bool drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel)
1491 struct drm_device *dev = fb_helper->dev;
1494 /* disable all the possible outputs/crtcs before entering KMS mode */
1495 drm_helper_disable_unused_functions(fb_helper->dev);
1497 drm_fb_helper_parse_command_line(fb_helper);
1499 count = drm_fb_helper_probe_connector_modes(fb_helper,
1500 dev->mode_config.max_width,
1501 dev->mode_config.max_height);
1503 * we shouldn't end up with no modes here.
1506 printk(KERN_INFO "No connectors reported connected with modes\n");
1508 drm_setup_crtcs(fb_helper);
1510 return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
1512 EXPORT_SYMBOL(drm_fb_helper_initial_config);
1514 bool drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper)
1517 u32 max_width, max_height, bpp_sel;
1518 bool bound = false, crtcs_bound = false;
1519 struct drm_crtc *crtc;
1524 list_for_each_entry(crtc, &fb_helper->dev->mode_config.crtc_list, head) {
1527 if (crtc->fb == fb_helper->fb)
1531 if (!bound && crtcs_bound) {
1532 fb_helper->delayed_hotplug = true;
1535 DRM_DEBUG_KMS("\n");
1537 max_width = fb_helper->fb->width;
1538 max_height = fb_helper->fb->height;
1539 bpp_sel = fb_helper->fb->bits_per_pixel;
1541 count = drm_fb_helper_probe_connector_modes(fb_helper, max_width,
1543 drm_setup_crtcs(fb_helper);
1545 return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
1547 EXPORT_SYMBOL(drm_fb_helper_hotplug_event);
1549 /* The Kconfig DRM_KMS_HELPER selects FRAMEBUFFER_CONSOLE (if !EXPERT)
1550 * but the module doesn't depend on any fb console symbols. At least
1551 * attempt to load fbcon to avoid leaving the system without a usable console.
1553 #if defined(CONFIG_FRAMEBUFFER_CONSOLE_MODULE) && !defined(CONFIG_EXPERT)
1554 static int __init drm_fb_helper_modinit(void)
1556 const char *name = "fbcon";
1557 struct module *fbcon;
1559 mutex_lock(&module_mutex);
1560 fbcon = find_module(name);
1561 mutex_unlock(&module_mutex);
1564 request_module_nowait(name);
1568 module_init(drm_fb_helper_modinit);