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>
34 #include <linux/module.h>
37 #include "drm_fb_helper.h"
38 #include "drm_crtc_helper.h"
40 MODULE_AUTHOR("David Airlie, Jesse Barnes");
41 MODULE_DESCRIPTION("DRM KMS helper");
42 MODULE_LICENSE("GPL and additional rights");
44 static LIST_HEAD(kernel_fb_helper_list);
46 /* simple single crtc case helper function */
47 int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper)
49 struct drm_device *dev = fb_helper->dev;
50 struct drm_connector *connector;
53 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
54 struct drm_fb_helper_connector *fb_helper_connector;
56 fb_helper_connector = kzalloc(sizeof(struct drm_fb_helper_connector), GFP_KERNEL);
57 if (!fb_helper_connector)
60 fb_helper_connector->connector = connector;
61 fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector;
65 for (i = 0; i < fb_helper->connector_count; i++) {
66 kfree(fb_helper->connector_info[i]);
67 fb_helper->connector_info[i] = NULL;
69 fb_helper->connector_count = 0;
72 EXPORT_SYMBOL(drm_fb_helper_single_add_all_connectors);
74 static int drm_fb_helper_parse_command_line(struct drm_fb_helper *fb_helper)
76 struct drm_fb_helper_connector *fb_helper_conn;
79 for (i = 0; i < fb_helper->connector_count; i++) {
80 struct drm_cmdline_mode *mode;
81 struct drm_connector *connector;
84 fb_helper_conn = fb_helper->connector_info[i];
85 connector = fb_helper_conn->connector;
86 mode = &fb_helper_conn->cmdline_mode;
88 /* do something on return - turn off connector maybe */
89 if (fb_get_options(drm_get_connector_name(connector), &option))
92 if (drm_mode_parse_command_line_for_connector(option,
97 switch (mode->force) {
98 case DRM_FORCE_OFF: s = "OFF"; break;
99 case DRM_FORCE_ON_DIGITAL: s = "ON - dig"; break;
101 case DRM_FORCE_ON: s = "ON"; break;
104 DRM_INFO("forcing %s connector %s\n",
105 drm_get_connector_name(connector), s);
106 connector->force = mode->force;
109 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n",
110 drm_get_connector_name(connector),
111 mode->xres, mode->yres,
112 mode->refresh_specified ? mode->refresh : 60,
113 mode->rb ? " reduced blanking" : "",
114 mode->margins ? " with margins" : "",
115 mode->interlace ? " interlaced" : "");
122 static void drm_fb_helper_save_lut_atomic(struct drm_crtc *crtc, struct drm_fb_helper *helper)
124 uint16_t *r_base, *g_base, *b_base;
127 r_base = crtc->gamma_store;
128 g_base = r_base + crtc->gamma_size;
129 b_base = g_base + crtc->gamma_size;
131 for (i = 0; i < crtc->gamma_size; i++)
132 helper->funcs->gamma_get(crtc, &r_base[i], &g_base[i], &b_base[i], i);
135 static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc)
137 uint16_t *r_base, *g_base, *b_base;
139 r_base = crtc->gamma_store;
140 g_base = r_base + crtc->gamma_size;
141 b_base = g_base + crtc->gamma_size;
143 crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size);
146 int drm_fb_helper_debug_enter(struct fb_info *info)
148 struct drm_fb_helper *helper = info->par;
149 struct drm_crtc_helper_funcs *funcs;
152 if (list_empty(&kernel_fb_helper_list))
155 list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) {
156 for (i = 0; i < helper->crtc_count; i++) {
157 struct drm_mode_set *mode_set =
158 &helper->crtc_info[i].mode_set;
160 if (!mode_set->crtc->enabled)
163 funcs = mode_set->crtc->helper_private;
164 drm_fb_helper_save_lut_atomic(mode_set->crtc, helper);
165 funcs->mode_set_base_atomic(mode_set->crtc,
169 ENTER_ATOMIC_MODE_SET);
175 EXPORT_SYMBOL(drm_fb_helper_debug_enter);
177 /* Find the real fb for a given fb helper CRTC */
178 static struct drm_framebuffer *drm_mode_config_fb(struct drm_crtc *crtc)
180 struct drm_device *dev = crtc->dev;
183 list_for_each_entry(c, &dev->mode_config.crtc_list, head) {
184 if (crtc->base.id == c->base.id)
191 int drm_fb_helper_debug_leave(struct fb_info *info)
193 struct drm_fb_helper *helper = info->par;
194 struct drm_crtc *crtc;
195 struct drm_crtc_helper_funcs *funcs;
196 struct drm_framebuffer *fb;
199 for (i = 0; i < helper->crtc_count; i++) {
200 struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set;
201 crtc = mode_set->crtc;
202 funcs = crtc->helper_private;
203 fb = drm_mode_config_fb(crtc);
209 DRM_ERROR("no fb to restore??\n");
213 drm_fb_helper_restore_lut_atomic(mode_set->crtc);
214 funcs->mode_set_base_atomic(mode_set->crtc, fb, crtc->x,
215 crtc->y, LEAVE_ATOMIC_MODE_SET);
220 EXPORT_SYMBOL(drm_fb_helper_debug_leave);
222 bool drm_fb_helper_restore_fbdev_mode(struct drm_fb_helper *fb_helper)
226 for (i = 0; i < fb_helper->crtc_count; i++) {
227 struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set;
228 ret = drm_crtc_helper_set_config(mode_set);
234 EXPORT_SYMBOL(drm_fb_helper_restore_fbdev_mode);
236 bool drm_fb_helper_force_kernel_mode(void)
238 bool ret, error = false;
239 struct drm_fb_helper *helper;
241 if (list_empty(&kernel_fb_helper_list))
244 list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) {
245 if (helper->dev->switch_power_state == DRM_SWITCH_POWER_OFF)
248 ret = drm_fb_helper_restore_fbdev_mode(helper);
255 int drm_fb_helper_panic(struct notifier_block *n, unsigned long ununsed,
259 * It's a waste of time and effort to switch back to text console
260 * if the kernel should reboot before panic messages can be seen.
262 if (panic_timeout < 0)
265 printk(KERN_ERR "panic occurred, switching back to text console\n");
266 return drm_fb_helper_force_kernel_mode();
268 EXPORT_SYMBOL(drm_fb_helper_panic);
270 static struct notifier_block paniced = {
271 .notifier_call = drm_fb_helper_panic,
275 * drm_fb_helper_restore - restore the framebuffer console (kernel) config
277 * Restore's the kernel's fbcon mode, used for lastclose & panic paths.
279 void drm_fb_helper_restore(void)
282 ret = drm_fb_helper_force_kernel_mode();
284 DRM_ERROR("Failed to restore crtc configuration\n");
286 EXPORT_SYMBOL(drm_fb_helper_restore);
288 #ifdef CONFIG_MAGIC_SYSRQ
289 static void drm_fb_helper_restore_work_fn(struct work_struct *ignored)
291 drm_fb_helper_restore();
293 static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn);
295 static void drm_fb_helper_sysrq(int dummy1)
297 schedule_work(&drm_fb_helper_restore_work);
300 static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = {
301 .handler = drm_fb_helper_sysrq,
302 .help_msg = "force-fb(V)",
303 .action_msg = "Restore framebuffer console",
306 static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { };
309 static void drm_fb_helper_on(struct fb_info *info)
311 struct drm_fb_helper *fb_helper = info->par;
312 struct drm_device *dev = fb_helper->dev;
313 struct drm_crtc *crtc;
314 struct drm_crtc_helper_funcs *crtc_funcs;
315 struct drm_connector *connector;
316 struct drm_encoder *encoder;
320 * For each CRTC in this fb, turn the crtc on then,
321 * find all associated encoders and turn them on.
323 mutex_lock(&dev->mode_config.mutex);
324 for (i = 0; i < fb_helper->crtc_count; i++) {
325 crtc = fb_helper->crtc_info[i].mode_set.crtc;
326 crtc_funcs = crtc->helper_private;
331 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
333 /* Walk the connectors & encoders on this fb turning them on */
334 for (j = 0; j < fb_helper->connector_count; j++) {
335 connector = fb_helper->connector_info[j]->connector;
336 connector->dpms = DRM_MODE_DPMS_ON;
337 drm_connector_property_set_value(connector,
338 dev->mode_config.dpms_property,
341 /* Found a CRTC on this fb, now find encoders */
342 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
343 if (encoder->crtc == crtc) {
344 struct drm_encoder_helper_funcs *encoder_funcs;
346 encoder_funcs = encoder->helper_private;
347 encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
351 mutex_unlock(&dev->mode_config.mutex);
354 static void drm_fb_helper_off(struct fb_info *info, int dpms_mode)
356 struct drm_fb_helper *fb_helper = info->par;
357 struct drm_device *dev = fb_helper->dev;
358 struct drm_crtc *crtc;
359 struct drm_crtc_helper_funcs *crtc_funcs;
360 struct drm_connector *connector;
361 struct drm_encoder *encoder;
365 * For each CRTC in this fb, find all associated encoders
366 * and turn them off, then turn off the CRTC.
368 mutex_lock(&dev->mode_config.mutex);
369 for (i = 0; i < fb_helper->crtc_count; i++) {
370 crtc = fb_helper->crtc_info[i].mode_set.crtc;
371 crtc_funcs = crtc->helper_private;
376 /* Walk the connectors on this fb and mark them off */
377 for (j = 0; j < fb_helper->connector_count; j++) {
378 connector = fb_helper->connector_info[j]->connector;
379 connector->dpms = dpms_mode;
380 drm_connector_property_set_value(connector,
381 dev->mode_config.dpms_property,
384 /* Found a CRTC on this fb, now find encoders */
385 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
386 if (encoder->crtc == crtc) {
387 struct drm_encoder_helper_funcs *encoder_funcs;
389 encoder_funcs = encoder->helper_private;
390 encoder_funcs->dpms(encoder, dpms_mode);
393 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
395 mutex_unlock(&dev->mode_config.mutex);
398 int drm_fb_helper_blank(int blank, struct fb_info *info)
401 /* Display: On; HSync: On, VSync: On */
402 case FB_BLANK_UNBLANK:
403 drm_fb_helper_on(info);
405 /* Display: Off; HSync: On, VSync: On */
406 case FB_BLANK_NORMAL:
407 drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
409 /* Display: Off; HSync: Off, VSync: On */
410 case FB_BLANK_HSYNC_SUSPEND:
411 drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
413 /* Display: Off; HSync: On, VSync: Off */
414 case FB_BLANK_VSYNC_SUSPEND:
415 drm_fb_helper_off(info, DRM_MODE_DPMS_SUSPEND);
417 /* Display: Off; HSync: Off, VSync: Off */
418 case FB_BLANK_POWERDOWN:
419 drm_fb_helper_off(info, DRM_MODE_DPMS_OFF);
424 EXPORT_SYMBOL(drm_fb_helper_blank);
426 static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper)
430 for (i = 0; i < helper->connector_count; i++)
431 kfree(helper->connector_info[i]);
432 kfree(helper->connector_info);
433 for (i = 0; i < helper->crtc_count; i++)
434 kfree(helper->crtc_info[i].mode_set.connectors);
435 kfree(helper->crtc_info);
438 int drm_fb_helper_init(struct drm_device *dev,
439 struct drm_fb_helper *fb_helper,
440 int crtc_count, int max_conn_count)
442 struct drm_crtc *crtc;
446 fb_helper->dev = dev;
448 INIT_LIST_HEAD(&fb_helper->kernel_fb_list);
450 fb_helper->crtc_info = kcalloc(crtc_count, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL);
451 if (!fb_helper->crtc_info)
454 fb_helper->crtc_count = crtc_count;
455 fb_helper->connector_info = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_fb_helper_connector *), GFP_KERNEL);
456 if (!fb_helper->connector_info) {
457 kfree(fb_helper->crtc_info);
460 fb_helper->connector_count = 0;
462 for (i = 0; i < crtc_count; i++) {
463 fb_helper->crtc_info[i].mode_set.connectors =
464 kcalloc(max_conn_count,
465 sizeof(struct drm_connector *),
468 if (!fb_helper->crtc_info[i].mode_set.connectors) {
472 fb_helper->crtc_info[i].mode_set.num_connectors = 0;
476 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
477 fb_helper->crtc_info[i].crtc_id = crtc->base.id;
478 fb_helper->crtc_info[i].mode_set.crtc = crtc;
481 fb_helper->conn_limit = max_conn_count;
484 drm_fb_helper_crtc_free(fb_helper);
487 EXPORT_SYMBOL(drm_fb_helper_init);
489 void drm_fb_helper_fini(struct drm_fb_helper *fb_helper)
491 if (!list_empty(&fb_helper->kernel_fb_list)) {
492 list_del(&fb_helper->kernel_fb_list);
493 if (list_empty(&kernel_fb_helper_list)) {
494 printk(KERN_INFO "drm: unregistered panic notifier\n");
495 atomic_notifier_chain_unregister(&panic_notifier_list,
497 unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op);
501 drm_fb_helper_crtc_free(fb_helper);
504 EXPORT_SYMBOL(drm_fb_helper_fini);
506 static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green,
507 u16 blue, u16 regno, struct fb_info *info)
509 struct drm_fb_helper *fb_helper = info->par;
510 struct drm_framebuffer *fb = fb_helper->fb;
513 if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
516 /* place color in psuedopalette */
519 palette = (u32 *)info->pseudo_palette;
520 red >>= (16 - info->var.red.length);
521 green >>= (16 - info->var.green.length);
522 blue >>= (16 - info->var.blue.length);
523 value = (red << info->var.red.offset) |
524 (green << info->var.green.offset) |
525 (blue << info->var.blue.offset);
526 if (info->var.transp.length > 0) {
527 u32 mask = (1 << info->var.transp.length) - 1;
528 mask <<= info->var.transp.offset;
531 palette[regno] = value;
537 if (fb->bits_per_pixel == 16) {
540 if (fb->depth == 16 && regno > 63)
542 if (fb->depth == 15 && regno > 31)
545 if (fb->depth == 16) {
549 for (i = 0; i < 8; i++)
550 fb_helper->funcs->gamma_set(crtc, red,
551 green, blue, pindex + i);
554 fb_helper->funcs->gamma_get(crtc, &r,
558 for (i = 0; i < 4; i++)
559 fb_helper->funcs->gamma_set(crtc, r,
566 fb_helper->funcs->gamma_set(crtc, red, green, blue, pindex);
570 int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info)
572 struct drm_fb_helper *fb_helper = info->par;
573 struct drm_crtc_helper_funcs *crtc_funcs;
574 u16 *red, *green, *blue, *transp;
575 struct drm_crtc *crtc;
579 for (i = 0; i < fb_helper->crtc_count; i++) {
580 crtc = fb_helper->crtc_info[i].mode_set.crtc;
581 crtc_funcs = crtc->helper_private;
586 transp = cmap->transp;
589 for (j = 0; j < cmap->len; j++) {
590 u16 hred, hgreen, hblue, htransp = 0xffff;
599 rc = setcolreg(crtc, hred, hgreen, hblue, start++, info);
603 crtc_funcs->load_lut(crtc);
607 EXPORT_SYMBOL(drm_fb_helper_setcmap);
609 int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
610 struct fb_info *info)
612 struct drm_fb_helper *fb_helper = info->par;
613 struct drm_framebuffer *fb = fb_helper->fb;
616 if (var->pixclock != 0 || in_dbg_master())
619 /* Need to resize the fb object !!! */
620 if (var->bits_per_pixel > fb->bits_per_pixel || var->xres > fb->width || var->yres > fb->height) {
621 DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb "
622 "object %dx%d-%d > %dx%d-%d\n", var->xres, var->yres, var->bits_per_pixel,
623 fb->width, fb->height, fb->bits_per_pixel);
627 switch (var->bits_per_pixel) {
629 depth = (var->green.length == 6) ? 16 : 15;
632 depth = (var->transp.length > 0) ? 32 : 24;
635 depth = var->bits_per_pixel;
642 var->green.offset = 0;
643 var->blue.offset = 0;
645 var->green.length = 8;
646 var->blue.length = 8;
647 var->transp.length = 0;
648 var->transp.offset = 0;
651 var->red.offset = 10;
652 var->green.offset = 5;
653 var->blue.offset = 0;
655 var->green.length = 5;
656 var->blue.length = 5;
657 var->transp.length = 1;
658 var->transp.offset = 15;
661 var->red.offset = 11;
662 var->green.offset = 5;
663 var->blue.offset = 0;
665 var->green.length = 6;
666 var->blue.length = 5;
667 var->transp.length = 0;
668 var->transp.offset = 0;
671 var->red.offset = 16;
672 var->green.offset = 8;
673 var->blue.offset = 0;
675 var->green.length = 8;
676 var->blue.length = 8;
677 var->transp.length = 0;
678 var->transp.offset = 0;
681 var->red.offset = 16;
682 var->green.offset = 8;
683 var->blue.offset = 0;
685 var->green.length = 8;
686 var->blue.length = 8;
687 var->transp.length = 8;
688 var->transp.offset = 24;
695 EXPORT_SYMBOL(drm_fb_helper_check_var);
697 /* this will let fbcon do the mode init */
698 int drm_fb_helper_set_par(struct fb_info *info)
700 struct drm_fb_helper *fb_helper = info->par;
701 struct drm_device *dev = fb_helper->dev;
702 struct fb_var_screeninfo *var = &info->var;
703 struct drm_crtc *crtc;
707 if (var->pixclock != 0) {
708 DRM_ERROR("PIXEL CLOCK SET\n");
712 mutex_lock(&dev->mode_config.mutex);
713 for (i = 0; i < fb_helper->crtc_count; i++) {
714 crtc = fb_helper->crtc_info[i].mode_set.crtc;
715 ret = crtc->funcs->set_config(&fb_helper->crtc_info[i].mode_set);
717 mutex_unlock(&dev->mode_config.mutex);
721 mutex_unlock(&dev->mode_config.mutex);
723 if (fb_helper->delayed_hotplug) {
724 fb_helper->delayed_hotplug = false;
725 drm_fb_helper_hotplug_event(fb_helper);
729 EXPORT_SYMBOL(drm_fb_helper_set_par);
731 int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
732 struct fb_info *info)
734 struct drm_fb_helper *fb_helper = info->par;
735 struct drm_device *dev = fb_helper->dev;
736 struct drm_mode_set *modeset;
737 struct drm_crtc *crtc;
741 mutex_lock(&dev->mode_config.mutex);
742 for (i = 0; i < fb_helper->crtc_count; i++) {
743 crtc = fb_helper->crtc_info[i].mode_set.crtc;
745 modeset = &fb_helper->crtc_info[i].mode_set;
747 modeset->x = var->xoffset;
748 modeset->y = var->yoffset;
750 if (modeset->num_connectors) {
751 ret = crtc->funcs->set_config(modeset);
753 info->var.xoffset = var->xoffset;
754 info->var.yoffset = var->yoffset;
758 mutex_unlock(&dev->mode_config.mutex);
761 EXPORT_SYMBOL(drm_fb_helper_pan_display);
763 int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper,
769 struct fb_info *info;
770 struct drm_fb_helper_surface_size sizes;
773 memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size));
774 sizes.surface_depth = 24;
775 sizes.surface_bpp = 32;
776 sizes.fb_width = (unsigned)-1;
777 sizes.fb_height = (unsigned)-1;
779 /* if driver picks 8 or 16 by default use that
780 for both depth/bpp */
781 if (preferred_bpp != sizes.surface_bpp) {
782 sizes.surface_depth = sizes.surface_bpp = preferred_bpp;
784 /* first up get a count of crtcs now in use and new min/maxes width/heights */
785 for (i = 0; i < fb_helper->connector_count; i++) {
786 struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i];
787 struct drm_cmdline_mode *cmdline_mode;
789 cmdline_mode = &fb_helper_conn->cmdline_mode;
791 if (cmdline_mode->bpp_specified) {
792 switch (cmdline_mode->bpp) {
794 sizes.surface_depth = sizes.surface_bpp = 8;
797 sizes.surface_depth = 15;
798 sizes.surface_bpp = 16;
801 sizes.surface_depth = sizes.surface_bpp = 16;
804 sizes.surface_depth = sizes.surface_bpp = 24;
807 sizes.surface_depth = 24;
808 sizes.surface_bpp = 32;
816 for (i = 0; i < fb_helper->crtc_count; i++) {
817 struct drm_display_mode *desired_mode;
818 desired_mode = fb_helper->crtc_info[i].desired_mode;
822 gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size;
823 if (desired_mode->hdisplay < sizes.fb_width)
824 sizes.fb_width = desired_mode->hdisplay;
825 if (desired_mode->vdisplay < sizes.fb_height)
826 sizes.fb_height = desired_mode->vdisplay;
827 if (desired_mode->hdisplay > sizes.surface_width)
828 sizes.surface_width = desired_mode->hdisplay;
829 if (desired_mode->vdisplay > sizes.surface_height)
830 sizes.surface_height = desired_mode->vdisplay;
835 if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) {
836 /* hmm everyone went away - assume VGA cable just fell out
837 and will come back later. */
838 DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n");
839 sizes.fb_width = sizes.surface_width = 1024;
840 sizes.fb_height = sizes.surface_height = 768;
843 /* push down into drivers */
844 new_fb = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes);
848 info = fb_helper->fbdev;
850 /* set the fb pointer */
851 for (i = 0; i < fb_helper->crtc_count; i++) {
852 fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb;
856 info->var.pixclock = 0;
857 if (register_framebuffer(info) < 0) {
861 printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
865 drm_fb_helper_set_par(info);
868 /* Switch back to kernel console on panic */
869 /* multi card linked list maybe */
870 if (list_empty(&kernel_fb_helper_list)) {
871 printk(KERN_INFO "drm: registered panic notifier\n");
872 atomic_notifier_chain_register(&panic_notifier_list,
874 register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op);
877 list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list);
881 EXPORT_SYMBOL(drm_fb_helper_single_fb_probe);
883 void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
886 info->fix.type = FB_TYPE_PACKED_PIXELS;
887 info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR :
889 info->fix.mmio_start = 0;
890 info->fix.mmio_len = 0;
891 info->fix.type_aux = 0;
892 info->fix.xpanstep = 1; /* doing it in hw */
893 info->fix.ypanstep = 1; /* doing it in hw */
894 info->fix.ywrapstep = 0;
895 info->fix.accel = FB_ACCEL_NONE;
896 info->fix.type_aux = 0;
898 info->fix.line_length = pitch;
901 EXPORT_SYMBOL(drm_fb_helper_fill_fix);
903 void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper,
904 uint32_t fb_width, uint32_t fb_height)
906 struct drm_framebuffer *fb = fb_helper->fb;
907 info->pseudo_palette = fb_helper->pseudo_palette;
908 info->var.xres_virtual = fb->width;
909 info->var.yres_virtual = fb->height;
910 info->var.bits_per_pixel = fb->bits_per_pixel;
911 info->var.accel_flags = FB_ACCELF_TEXT;
912 info->var.xoffset = 0;
913 info->var.yoffset = 0;
914 info->var.activate = FB_ACTIVATE_NOW;
915 info->var.height = -1;
916 info->var.width = -1;
920 info->var.red.offset = 0;
921 info->var.green.offset = 0;
922 info->var.blue.offset = 0;
923 info->var.red.length = 8; /* 8bit DAC */
924 info->var.green.length = 8;
925 info->var.blue.length = 8;
926 info->var.transp.offset = 0;
927 info->var.transp.length = 0;
930 info->var.red.offset = 10;
931 info->var.green.offset = 5;
932 info->var.blue.offset = 0;
933 info->var.red.length = 5;
934 info->var.green.length = 5;
935 info->var.blue.length = 5;
936 info->var.transp.offset = 15;
937 info->var.transp.length = 1;
940 info->var.red.offset = 11;
941 info->var.green.offset = 5;
942 info->var.blue.offset = 0;
943 info->var.red.length = 5;
944 info->var.green.length = 6;
945 info->var.blue.length = 5;
946 info->var.transp.offset = 0;
949 info->var.red.offset = 16;
950 info->var.green.offset = 8;
951 info->var.blue.offset = 0;
952 info->var.red.length = 8;
953 info->var.green.length = 8;
954 info->var.blue.length = 8;
955 info->var.transp.offset = 0;
956 info->var.transp.length = 0;
959 info->var.red.offset = 16;
960 info->var.green.offset = 8;
961 info->var.blue.offset = 0;
962 info->var.red.length = 8;
963 info->var.green.length = 8;
964 info->var.blue.length = 8;
965 info->var.transp.offset = 24;
966 info->var.transp.length = 8;
972 info->var.xres = fb_width;
973 info->var.yres = fb_height;
975 EXPORT_SYMBOL(drm_fb_helper_fill_var);
977 static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper,
981 struct drm_connector *connector;
985 for (i = 0; i < fb_helper->connector_count; i++) {
986 connector = fb_helper->connector_info[i]->connector;
987 count += connector->funcs->fill_modes(connector, maxX, maxY);
993 static struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height)
995 struct drm_display_mode *mode;
997 list_for_each_entry(mode, &fb_connector->connector->modes, head) {
998 if (drm_mode_width(mode) > width ||
999 drm_mode_height(mode) > height)
1001 if (mode->type & DRM_MODE_TYPE_PREFERRED)
1007 static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector)
1009 struct drm_cmdline_mode *cmdline_mode;
1010 cmdline_mode = &fb_connector->cmdline_mode;
1011 return cmdline_mode->specified;
1014 static struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn,
1015 int width, int height)
1017 struct drm_cmdline_mode *cmdline_mode;
1018 struct drm_display_mode *mode = NULL;
1020 cmdline_mode = &fb_helper_conn->cmdline_mode;
1021 if (cmdline_mode->specified == false)
1024 /* attempt to find a matching mode in the list of modes
1025 * we have gotten so far, if not add a CVT mode that conforms
1027 if (cmdline_mode->rb || cmdline_mode->margins)
1030 list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) {
1031 /* check width/height */
1032 if (mode->hdisplay != cmdline_mode->xres ||
1033 mode->vdisplay != cmdline_mode->yres)
1036 if (cmdline_mode->refresh_specified) {
1037 if (mode->vrefresh != cmdline_mode->refresh)
1041 if (cmdline_mode->interlace) {
1042 if (!(mode->flags & DRM_MODE_FLAG_INTERLACE))
1049 mode = drm_mode_create_from_cmdline_mode(fb_helper_conn->connector->dev,
1051 list_add(&mode->head, &fb_helper_conn->connector->modes);
1055 static bool drm_connector_enabled(struct drm_connector *connector, bool strict)
1060 enable = connector->status == connector_status_connected;
1062 enable = connector->status != connector_status_disconnected;
1067 static void drm_enable_connectors(struct drm_fb_helper *fb_helper,
1070 bool any_enabled = false;
1071 struct drm_connector *connector;
1074 for (i = 0; i < fb_helper->connector_count; i++) {
1075 connector = fb_helper->connector_info[i]->connector;
1076 enabled[i] = drm_connector_enabled(connector, true);
1077 DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id,
1078 enabled[i] ? "yes" : "no");
1079 any_enabled |= enabled[i];
1085 for (i = 0; i < fb_helper->connector_count; i++) {
1086 connector = fb_helper->connector_info[i]->connector;
1087 enabled[i] = drm_connector_enabled(connector, false);
1091 static bool drm_target_cloned(struct drm_fb_helper *fb_helper,
1092 struct drm_display_mode **modes,
1093 bool *enabled, int width, int height)
1096 bool can_clone = false;
1097 struct drm_fb_helper_connector *fb_helper_conn;
1098 struct drm_display_mode *dmt_mode, *mode;
1100 /* only contemplate cloning in the single crtc case */
1101 if (fb_helper->crtc_count > 1)
1105 for (i = 0; i < fb_helper->connector_count; i++) {
1110 /* only contemplate cloning if more than one connector is enabled */
1114 /* check the command line or if nothing common pick 1024x768 */
1116 for (i = 0; i < fb_helper->connector_count; i++) {
1119 fb_helper_conn = fb_helper->connector_info[i];
1120 modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height);
1125 for (j = 0; j < i; j++) {
1128 if (!drm_mode_equal(modes[j], modes[i]))
1134 DRM_DEBUG_KMS("can clone using command line\n");
1138 /* try and find a 1024x768 mode on each connector */
1140 dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60);
1142 for (i = 0; i < fb_helper->connector_count; i++) {
1147 fb_helper_conn = fb_helper->connector_info[i];
1148 list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) {
1149 if (drm_mode_equal(mode, dmt_mode))
1157 DRM_DEBUG_KMS("can clone using 1024x768\n");
1160 DRM_INFO("kms: can't enable cloning when we probably wanted to.\n");
1164 static bool drm_target_preferred(struct drm_fb_helper *fb_helper,
1165 struct drm_display_mode **modes,
1166 bool *enabled, int width, int height)
1168 struct drm_fb_helper_connector *fb_helper_conn;
1171 for (i = 0; i < fb_helper->connector_count; i++) {
1172 fb_helper_conn = fb_helper->connector_info[i];
1174 if (enabled[i] == false)
1177 DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n",
1178 fb_helper_conn->connector->base.id);
1180 /* got for command line mode first */
1181 modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height);
1183 DRM_DEBUG_KMS("looking for preferred mode on connector %d\n",
1184 fb_helper_conn->connector->base.id);
1185 modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height);
1187 /* No preferred modes, pick one off the list */
1188 if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) {
1189 list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head)
1192 DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name :
1198 static int drm_pick_crtcs(struct drm_fb_helper *fb_helper,
1199 struct drm_fb_helper_crtc **best_crtcs,
1200 struct drm_display_mode **modes,
1201 int n, int width, int height)
1204 struct drm_device *dev = fb_helper->dev;
1205 struct drm_connector *connector;
1206 struct drm_connector_helper_funcs *connector_funcs;
1207 struct drm_encoder *encoder;
1208 struct drm_fb_helper_crtc *best_crtc;
1209 int my_score, best_score, score;
1210 struct drm_fb_helper_crtc **crtcs, *crtc;
1211 struct drm_fb_helper_connector *fb_helper_conn;
1213 if (n == fb_helper->connector_count)
1216 fb_helper_conn = fb_helper->connector_info[n];
1217 connector = fb_helper_conn->connector;
1219 best_crtcs[n] = NULL;
1221 best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height);
1222 if (modes[n] == NULL)
1225 crtcs = kzalloc(dev->mode_config.num_connector *
1226 sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL);
1231 if (connector->status == connector_status_connected)
1233 if (drm_has_cmdline_mode(fb_helper_conn))
1235 if (drm_has_preferred_mode(fb_helper_conn, width, height))
1238 connector_funcs = connector->helper_private;
1239 encoder = connector_funcs->best_encoder(connector);
1243 /* select a crtc for this connector and then attempt to configure
1244 remaining connectors */
1245 for (c = 0; c < fb_helper->crtc_count; c++) {
1246 crtc = &fb_helper->crtc_info[c];
1248 if ((encoder->possible_crtcs & (1 << c)) == 0) {
1252 for (o = 0; o < n; o++)
1253 if (best_crtcs[o] == crtc)
1257 /* ignore cloning unless only a single crtc */
1258 if (fb_helper->crtc_count > 1)
1261 if (!drm_mode_equal(modes[o], modes[n]))
1266 memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *));
1267 score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1,
1269 if (score > best_score) {
1272 memcpy(best_crtcs, crtcs,
1273 dev->mode_config.num_connector *
1274 sizeof(struct drm_fb_helper_crtc *));
1282 static void drm_setup_crtcs(struct drm_fb_helper *fb_helper)
1284 struct drm_device *dev = fb_helper->dev;
1285 struct drm_fb_helper_crtc **crtcs;
1286 struct drm_display_mode **modes;
1287 struct drm_encoder *encoder;
1288 struct drm_mode_set *modeset;
1293 DRM_DEBUG_KMS("\n");
1295 width = dev->mode_config.max_width;
1296 height = dev->mode_config.max_height;
1298 /* clean out all the encoder/crtc combos */
1299 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
1300 encoder->crtc = NULL;
1303 crtcs = kcalloc(dev->mode_config.num_connector,
1304 sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL);
1305 modes = kcalloc(dev->mode_config.num_connector,
1306 sizeof(struct drm_display_mode *), GFP_KERNEL);
1307 enabled = kcalloc(dev->mode_config.num_connector,
1308 sizeof(bool), GFP_KERNEL);
1310 drm_enable_connectors(fb_helper, enabled);
1312 ret = drm_target_cloned(fb_helper, modes, enabled, width, height);
1314 ret = drm_target_preferred(fb_helper, modes, enabled, width, height);
1316 DRM_ERROR("Unable to find initial modes\n");
1319 DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width, height);
1321 drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height);
1323 /* need to set the modesets up here for use later */
1324 /* fill out the connector<->crtc mappings into the modesets */
1325 for (i = 0; i < fb_helper->crtc_count; i++) {
1326 modeset = &fb_helper->crtc_info[i].mode_set;
1327 modeset->num_connectors = 0;
1330 for (i = 0; i < fb_helper->connector_count; i++) {
1331 struct drm_display_mode *mode = modes[i];
1332 struct drm_fb_helper_crtc *fb_crtc = crtcs[i];
1333 modeset = &fb_crtc->mode_set;
1335 if (mode && fb_crtc) {
1336 DRM_DEBUG_KMS("desired mode %s set on crtc %d\n",
1337 mode->name, fb_crtc->mode_set.crtc->base.id);
1338 fb_crtc->desired_mode = mode;
1340 drm_mode_destroy(dev, modeset->mode);
1341 modeset->mode = drm_mode_duplicate(dev,
1342 fb_crtc->desired_mode);
1343 modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector;
1353 * drm_helper_initial_config - setup a sane initial connector configuration
1357 * Called at init time, must take mode config lock.
1359 * Scan the CRTCs and connectors and try to put together an initial setup.
1360 * At the moment, this is a cloned configuration across all heads with
1361 * a new framebuffer object as the backing store.
1364 * Zero if everything went ok, nonzero otherwise.
1366 bool drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel)
1368 struct drm_device *dev = fb_helper->dev;
1371 /* disable all the possible outputs/crtcs before entering KMS mode */
1372 drm_helper_disable_unused_functions(fb_helper->dev);
1374 drm_fb_helper_parse_command_line(fb_helper);
1376 count = drm_fb_helper_probe_connector_modes(fb_helper,
1377 dev->mode_config.max_width,
1378 dev->mode_config.max_height);
1380 * we shouldn't end up with no modes here.
1383 printk(KERN_INFO "No connectors reported connected with modes\n");
1385 drm_setup_crtcs(fb_helper);
1387 return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
1389 EXPORT_SYMBOL(drm_fb_helper_initial_config);
1392 * drm_fb_helper_hotplug_event - respond to a hotplug notification by
1393 * probing all the outputs attached to the fb.
1394 * @fb_helper: the drm_fb_helper
1397 * Called at runtime, must take mode config lock.
1399 * Scan the connectors attached to the fb_helper and try to put together a
1400 * setup after *notification of a change in output configuration.
1403 * 0 on success and a non-zero error code otherwise.
1405 int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper)
1407 struct drm_device *dev = fb_helper->dev;
1409 u32 max_width, max_height, bpp_sel;
1410 bool bound = false, crtcs_bound = false;
1411 struct drm_crtc *crtc;
1416 mutex_lock(&dev->mode_config.mutex);
1417 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
1420 if (crtc->fb == fb_helper->fb)
1424 if (!bound && crtcs_bound) {
1425 fb_helper->delayed_hotplug = true;
1426 mutex_unlock(&dev->mode_config.mutex);
1429 DRM_DEBUG_KMS("\n");
1431 max_width = fb_helper->fb->width;
1432 max_height = fb_helper->fb->height;
1433 bpp_sel = fb_helper->fb->bits_per_pixel;
1435 count = drm_fb_helper_probe_connector_modes(fb_helper, max_width,
1437 drm_setup_crtcs(fb_helper);
1438 mutex_unlock(&dev->mode_config.mutex);
1440 return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
1442 EXPORT_SYMBOL(drm_fb_helper_hotplug_event);
1444 /* The Kconfig DRM_KMS_HELPER selects FRAMEBUFFER_CONSOLE (if !EXPERT)
1445 * but the module doesn't depend on any fb console symbols. At least
1446 * attempt to load fbcon to avoid leaving the system without a usable console.
1448 #if defined(CONFIG_FRAMEBUFFER_CONSOLE_MODULE) && !defined(CONFIG_EXPERT)
1449 static int __init drm_fb_helper_modinit(void)
1451 const char *name = "fbcon";
1452 struct module *fbcon;
1454 mutex_lock(&module_mutex);
1455 fbcon = find_module(name);
1456 mutex_unlock(&module_mutex);
1459 request_module_nowait(name);
1463 module_init(drm_fb_helper_modinit);