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 bool drm_fb_helper_force_kernel_mode(void)
247 bool ret, error = false;
248 struct drm_fb_helper *helper;
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 = &helper->crtc_info[i].mode_set;
256 ret = drm_crtc_helper_set_config(mode_set);
264 int drm_fb_helper_panic(struct notifier_block *n, unsigned long ununsed,
267 printk(KERN_ERR "panic occurred, switching back to text console\n");
268 return drm_fb_helper_force_kernel_mode();
271 EXPORT_SYMBOL(drm_fb_helper_panic);
273 static struct notifier_block paniced = {
274 .notifier_call = drm_fb_helper_panic,
278 * drm_fb_helper_restore - restore the framebuffer console (kernel) config
280 * Restore's the kernel's fbcon mode, used for lastclose & panic paths.
282 void drm_fb_helper_restore(void)
285 ret = drm_fb_helper_force_kernel_mode();
287 DRM_ERROR("Failed to restore crtc configuration\n");
289 EXPORT_SYMBOL(drm_fb_helper_restore);
291 #ifdef CONFIG_MAGIC_SYSRQ
292 static void drm_fb_helper_restore_work_fn(struct work_struct *ignored)
294 drm_fb_helper_restore();
296 static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn);
298 static void drm_fb_helper_sysrq(int dummy1, struct tty_struct *dummy3)
300 schedule_work(&drm_fb_helper_restore_work);
303 static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = {
304 .handler = drm_fb_helper_sysrq,
305 .help_msg = "force-fb(V)",
306 .action_msg = "Restore framebuffer console",
309 static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { };
312 static void drm_fb_helper_on(struct fb_info *info)
314 struct drm_fb_helper *fb_helper = info->par;
315 struct drm_device *dev = fb_helper->dev;
316 struct drm_crtc *crtc;
317 struct drm_crtc_helper_funcs *crtc_funcs;
318 struct drm_connector *connector;
319 struct drm_encoder *encoder;
323 * For each CRTC in this fb, turn the crtc on then,
324 * find all associated encoders and turn them on.
326 mutex_lock(&dev->mode_config.mutex);
327 for (i = 0; i < fb_helper->crtc_count; i++) {
328 crtc = fb_helper->crtc_info[i].mode_set.crtc;
329 crtc_funcs = crtc->helper_private;
334 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
336 /* Walk the connectors & encoders on this fb turning them on */
337 for (j = 0; j < fb_helper->connector_count; j++) {
338 connector = fb_helper->connector_info[j]->connector;
339 connector->dpms = DRM_MODE_DPMS_ON;
340 drm_connector_property_set_value(connector,
341 dev->mode_config.dpms_property,
344 /* Found a CRTC on this fb, now find encoders */
345 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
346 if (encoder->crtc == crtc) {
347 struct drm_encoder_helper_funcs *encoder_funcs;
349 encoder_funcs = encoder->helper_private;
350 encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
354 mutex_unlock(&dev->mode_config.mutex);
357 static void drm_fb_helper_off(struct fb_info *info, int dpms_mode)
359 struct drm_fb_helper *fb_helper = info->par;
360 struct drm_device *dev = fb_helper->dev;
361 struct drm_crtc *crtc;
362 struct drm_crtc_helper_funcs *crtc_funcs;
363 struct drm_connector *connector;
364 struct drm_encoder *encoder;
368 * For each CRTC in this fb, find all associated encoders
369 * and turn them off, then turn off the CRTC.
371 mutex_lock(&dev->mode_config.mutex);
372 for (i = 0; i < fb_helper->crtc_count; i++) {
373 crtc = fb_helper->crtc_info[i].mode_set.crtc;
374 crtc_funcs = crtc->helper_private;
379 /* Walk the connectors on this fb and mark them off */
380 for (j = 0; j < fb_helper->connector_count; j++) {
381 connector = fb_helper->connector_info[j]->connector;
382 connector->dpms = dpms_mode;
383 drm_connector_property_set_value(connector,
384 dev->mode_config.dpms_property,
387 /* Found a CRTC on this fb, now find encoders */
388 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
389 if (encoder->crtc == crtc) {
390 struct drm_encoder_helper_funcs *encoder_funcs;
392 encoder_funcs = encoder->helper_private;
393 encoder_funcs->dpms(encoder, dpms_mode);
396 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
398 mutex_unlock(&dev->mode_config.mutex);
401 int drm_fb_helper_blank(int blank, struct fb_info *info)
404 /* Display: On; HSync: On, VSync: On */
405 case FB_BLANK_UNBLANK:
406 drm_fb_helper_on(info);
408 /* Display: Off; HSync: On, VSync: On */
409 case FB_BLANK_NORMAL:
410 drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
412 /* Display: Off; HSync: Off, VSync: On */
413 case FB_BLANK_HSYNC_SUSPEND:
414 drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
416 /* Display: Off; HSync: On, VSync: Off */
417 case FB_BLANK_VSYNC_SUSPEND:
418 drm_fb_helper_off(info, DRM_MODE_DPMS_SUSPEND);
420 /* Display: Off; HSync: Off, VSync: Off */
421 case FB_BLANK_POWERDOWN:
422 drm_fb_helper_off(info, DRM_MODE_DPMS_OFF);
427 EXPORT_SYMBOL(drm_fb_helper_blank);
429 static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper)
433 for (i = 0; i < helper->connector_count; i++)
434 kfree(helper->connector_info[i]);
435 kfree(helper->connector_info);
436 for (i = 0; i < helper->crtc_count; i++)
437 kfree(helper->crtc_info[i].mode_set.connectors);
438 kfree(helper->crtc_info);
441 int drm_fb_helper_init(struct drm_device *dev,
442 struct drm_fb_helper *fb_helper,
443 int crtc_count, int max_conn_count)
445 struct drm_crtc *crtc;
449 fb_helper->dev = dev;
451 INIT_LIST_HEAD(&fb_helper->kernel_fb_list);
453 fb_helper->crtc_info = kcalloc(crtc_count, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL);
454 if (!fb_helper->crtc_info)
457 fb_helper->crtc_count = crtc_count;
458 fb_helper->connector_info = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_fb_helper_connector *), GFP_KERNEL);
459 if (!fb_helper->connector_info) {
460 kfree(fb_helper->crtc_info);
463 fb_helper->connector_count = 0;
465 for (i = 0; i < crtc_count; i++) {
466 fb_helper->crtc_info[i].mode_set.connectors =
467 kcalloc(max_conn_count,
468 sizeof(struct drm_connector *),
471 if (!fb_helper->crtc_info[i].mode_set.connectors) {
475 fb_helper->crtc_info[i].mode_set.num_connectors = 0;
479 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
480 fb_helper->crtc_info[i].crtc_id = crtc->base.id;
481 fb_helper->crtc_info[i].mode_set.crtc = crtc;
484 fb_helper->conn_limit = max_conn_count;
487 drm_fb_helper_crtc_free(fb_helper);
490 EXPORT_SYMBOL(drm_fb_helper_init);
492 void drm_fb_helper_fini(struct drm_fb_helper *fb_helper)
494 if (!list_empty(&fb_helper->kernel_fb_list)) {
495 list_del(&fb_helper->kernel_fb_list);
496 if (list_empty(&kernel_fb_helper_list)) {
497 printk(KERN_INFO "drm: unregistered panic notifier\n");
498 atomic_notifier_chain_unregister(&panic_notifier_list,
500 unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op);
504 drm_fb_helper_crtc_free(fb_helper);
507 EXPORT_SYMBOL(drm_fb_helper_fini);
509 static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green,
510 u16 blue, u16 regno, struct fb_info *info)
512 struct drm_fb_helper *fb_helper = info->par;
513 struct drm_framebuffer *fb = fb_helper->fb;
516 if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
519 /* place color in psuedopalette */
522 palette = (u32 *)info->pseudo_palette;
523 red >>= (16 - info->var.red.length);
524 green >>= (16 - info->var.green.length);
525 blue >>= (16 - info->var.blue.length);
526 value = (red << info->var.red.offset) |
527 (green << info->var.green.offset) |
528 (blue << info->var.blue.offset);
529 palette[regno] = value;
535 if (fb->bits_per_pixel == 16) {
538 if (fb->depth == 16 && regno > 63)
540 if (fb->depth == 15 && regno > 31)
543 if (fb->depth == 16) {
547 for (i = 0; i < 8; i++)
548 fb_helper->funcs->gamma_set(crtc, red,
549 green, blue, pindex + i);
552 fb_helper->funcs->gamma_get(crtc, &r,
556 for (i = 0; i < 4; i++)
557 fb_helper->funcs->gamma_set(crtc, r,
564 fb_helper->funcs->gamma_set(crtc, red, green, blue, pindex);
568 int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info)
570 struct drm_fb_helper *fb_helper = info->par;
571 struct drm_crtc_helper_funcs *crtc_funcs;
572 u16 *red, *green, *blue, *transp;
573 struct drm_crtc *crtc;
577 for (i = 0; i < fb_helper->crtc_count; i++) {
578 crtc = fb_helper->crtc_info[i].mode_set.crtc;
579 crtc_funcs = crtc->helper_private;
584 transp = cmap->transp;
587 for (i = 0; i < cmap->len; i++) {
588 u16 hred, hgreen, hblue, htransp = 0xffff;
597 rc = setcolreg(crtc, hred, hgreen, hblue, start++, info);
601 crtc_funcs->load_lut(crtc);
605 EXPORT_SYMBOL(drm_fb_helper_setcmap);
607 int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
608 struct fb_info *info)
610 struct drm_fb_helper *fb_helper = info->par;
611 struct drm_framebuffer *fb = fb_helper->fb;
614 if (var->pixclock != 0)
617 /* Need to resize the fb object !!! */
618 if (var->bits_per_pixel > fb->bits_per_pixel || var->xres > fb->width || var->yres > fb->height) {
619 DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb "
620 "object %dx%d-%d > %dx%d-%d\n", var->xres, var->yres, var->bits_per_pixel,
621 fb->width, fb->height, fb->bits_per_pixel);
625 switch (var->bits_per_pixel) {
627 depth = (var->green.length == 6) ? 16 : 15;
630 depth = (var->transp.length > 0) ? 32 : 24;
633 depth = var->bits_per_pixel;
640 var->green.offset = 0;
641 var->blue.offset = 0;
643 var->green.length = 8;
644 var->blue.length = 8;
645 var->transp.length = 0;
646 var->transp.offset = 0;
649 var->red.offset = 10;
650 var->green.offset = 5;
651 var->blue.offset = 0;
653 var->green.length = 5;
654 var->blue.length = 5;
655 var->transp.length = 1;
656 var->transp.offset = 15;
659 var->red.offset = 11;
660 var->green.offset = 5;
661 var->blue.offset = 0;
663 var->green.length = 6;
664 var->blue.length = 5;
665 var->transp.length = 0;
666 var->transp.offset = 0;
669 var->red.offset = 16;
670 var->green.offset = 8;
671 var->blue.offset = 0;
673 var->green.length = 8;
674 var->blue.length = 8;
675 var->transp.length = 0;
676 var->transp.offset = 0;
679 var->red.offset = 16;
680 var->green.offset = 8;
681 var->blue.offset = 0;
683 var->green.length = 8;
684 var->blue.length = 8;
685 var->transp.length = 8;
686 var->transp.offset = 24;
693 EXPORT_SYMBOL(drm_fb_helper_check_var);
695 /* this will let fbcon do the mode init */
696 int drm_fb_helper_set_par(struct fb_info *info)
698 struct drm_fb_helper *fb_helper = info->par;
699 struct drm_device *dev = fb_helper->dev;
700 struct fb_var_screeninfo *var = &info->var;
701 struct drm_crtc *crtc;
705 if (var->pixclock != 0) {
706 DRM_ERROR("PIXEL CLOCK SET\n");
710 mutex_lock(&dev->mode_config.mutex);
711 for (i = 0; i < fb_helper->crtc_count; i++) {
712 crtc = fb_helper->crtc_info[i].mode_set.crtc;
713 ret = crtc->funcs->set_config(&fb_helper->crtc_info[i].mode_set);
715 mutex_unlock(&dev->mode_config.mutex);
719 mutex_unlock(&dev->mode_config.mutex);
721 if (fb_helper->delayed_hotplug) {
722 fb_helper->delayed_hotplug = false;
723 drm_fb_helper_hotplug_event(fb_helper);
727 EXPORT_SYMBOL(drm_fb_helper_set_par);
729 int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
730 struct fb_info *info)
732 struct drm_fb_helper *fb_helper = info->par;
733 struct drm_device *dev = fb_helper->dev;
734 struct drm_mode_set *modeset;
735 struct drm_crtc *crtc;
739 mutex_lock(&dev->mode_config.mutex);
740 for (i = 0; i < fb_helper->crtc_count; i++) {
741 crtc = fb_helper->crtc_info[i].mode_set.crtc;
743 modeset = &fb_helper->crtc_info[i].mode_set;
745 modeset->x = var->xoffset;
746 modeset->y = var->yoffset;
748 if (modeset->num_connectors) {
749 ret = crtc->funcs->set_config(modeset);
751 info->var.xoffset = var->xoffset;
752 info->var.yoffset = var->yoffset;
756 mutex_unlock(&dev->mode_config.mutex);
759 EXPORT_SYMBOL(drm_fb_helper_pan_display);
761 int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper,
767 struct fb_info *info;
768 struct drm_fb_helper_surface_size sizes;
771 memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size));
772 sizes.surface_depth = 24;
773 sizes.surface_bpp = 32;
774 sizes.fb_width = (unsigned)-1;
775 sizes.fb_height = (unsigned)-1;
777 /* if driver picks 8 or 16 by default use that
778 for both depth/bpp */
779 if (preferred_bpp != sizes.surface_bpp) {
780 sizes.surface_depth = sizes.surface_bpp = preferred_bpp;
782 /* first up get a count of crtcs now in use and new min/maxes width/heights */
783 for (i = 0; i < fb_helper->connector_count; i++) {
784 struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i];
785 struct drm_fb_helper_cmdline_mode *cmdline_mode;
787 cmdline_mode = &fb_helper_conn->cmdline_mode;
789 if (cmdline_mode->bpp_specified) {
790 switch (cmdline_mode->bpp) {
792 sizes.surface_depth = sizes.surface_bpp = 8;
795 sizes.surface_depth = 15;
796 sizes.surface_bpp = 16;
799 sizes.surface_depth = sizes.surface_bpp = 16;
802 sizes.surface_depth = sizes.surface_bpp = 24;
805 sizes.surface_depth = 24;
806 sizes.surface_bpp = 32;
814 for (i = 0; i < fb_helper->crtc_count; i++) {
815 struct drm_display_mode *desired_mode;
816 desired_mode = fb_helper->crtc_info[i].desired_mode;
820 gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size;
821 if (desired_mode->hdisplay < sizes.fb_width)
822 sizes.fb_width = desired_mode->hdisplay;
823 if (desired_mode->vdisplay < sizes.fb_height)
824 sizes.fb_height = desired_mode->vdisplay;
825 if (desired_mode->hdisplay > sizes.surface_width)
826 sizes.surface_width = desired_mode->hdisplay;
827 if (desired_mode->vdisplay > sizes.surface_height)
828 sizes.surface_height = desired_mode->vdisplay;
833 if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) {
834 /* hmm everyone went away - assume VGA cable just fell out
835 and will come back later. */
836 DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n");
837 sizes.fb_width = sizes.surface_width = 1024;
838 sizes.fb_height = sizes.surface_height = 768;
841 /* push down into drivers */
842 new_fb = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes);
846 info = fb_helper->fbdev;
848 /* set the fb pointer */
849 for (i = 0; i < fb_helper->crtc_count; i++) {
850 fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb;
854 info->var.pixclock = 0;
855 if (register_framebuffer(info) < 0) {
859 printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
863 drm_fb_helper_set_par(info);
866 /* Switch back to kernel console on panic */
867 /* multi card linked list maybe */
868 if (list_empty(&kernel_fb_helper_list)) {
869 printk(KERN_INFO "drm: registered panic notifier\n");
870 atomic_notifier_chain_register(&panic_notifier_list,
872 register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op);
875 list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list);
879 EXPORT_SYMBOL(drm_fb_helper_single_fb_probe);
881 void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
884 info->fix.type = FB_TYPE_PACKED_PIXELS;
885 info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR :
887 info->fix.type_aux = 0;
888 info->fix.xpanstep = 1; /* doing it in hw */
889 info->fix.ypanstep = 1; /* doing it in hw */
890 info->fix.ywrapstep = 0;
891 info->fix.accel = FB_ACCEL_NONE;
892 info->fix.type_aux = 0;
894 info->fix.line_length = pitch;
897 EXPORT_SYMBOL(drm_fb_helper_fill_fix);
899 void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper,
900 uint32_t fb_width, uint32_t fb_height)
902 struct drm_framebuffer *fb = fb_helper->fb;
903 info->pseudo_palette = fb_helper->pseudo_palette;
904 info->var.xres_virtual = fb->width;
905 info->var.yres_virtual = fb->height;
906 info->var.bits_per_pixel = fb->bits_per_pixel;
907 info->var.xoffset = 0;
908 info->var.yoffset = 0;
909 info->var.activate = FB_ACTIVATE_NOW;
910 info->var.height = -1;
911 info->var.width = -1;
915 info->var.red.offset = 0;
916 info->var.green.offset = 0;
917 info->var.blue.offset = 0;
918 info->var.red.length = 8; /* 8bit DAC */
919 info->var.green.length = 8;
920 info->var.blue.length = 8;
921 info->var.transp.offset = 0;
922 info->var.transp.length = 0;
925 info->var.red.offset = 10;
926 info->var.green.offset = 5;
927 info->var.blue.offset = 0;
928 info->var.red.length = 5;
929 info->var.green.length = 5;
930 info->var.blue.length = 5;
931 info->var.transp.offset = 15;
932 info->var.transp.length = 1;
935 info->var.red.offset = 11;
936 info->var.green.offset = 5;
937 info->var.blue.offset = 0;
938 info->var.red.length = 5;
939 info->var.green.length = 6;
940 info->var.blue.length = 5;
941 info->var.transp.offset = 0;
944 info->var.red.offset = 16;
945 info->var.green.offset = 8;
946 info->var.blue.offset = 0;
947 info->var.red.length = 8;
948 info->var.green.length = 8;
949 info->var.blue.length = 8;
950 info->var.transp.offset = 0;
951 info->var.transp.length = 0;
954 info->var.red.offset = 16;
955 info->var.green.offset = 8;
956 info->var.blue.offset = 0;
957 info->var.red.length = 8;
958 info->var.green.length = 8;
959 info->var.blue.length = 8;
960 info->var.transp.offset = 24;
961 info->var.transp.length = 8;
967 info->var.xres = fb_width;
968 info->var.yres = fb_height;
970 EXPORT_SYMBOL(drm_fb_helper_fill_var);
972 static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper,
976 struct drm_connector *connector;
980 for (i = 0; i < fb_helper->connector_count; i++) {
981 connector = fb_helper->connector_info[i]->connector;
982 count += connector->funcs->fill_modes(connector, maxX, maxY);
988 static struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height)
990 struct drm_display_mode *mode;
992 list_for_each_entry(mode, &fb_connector->connector->modes, head) {
993 if (drm_mode_width(mode) > width ||
994 drm_mode_height(mode) > height)
996 if (mode->type & DRM_MODE_TYPE_PREFERRED)
1002 static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector)
1004 struct drm_fb_helper_cmdline_mode *cmdline_mode;
1005 cmdline_mode = &fb_connector->cmdline_mode;
1006 return cmdline_mode->specified;
1009 static struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn,
1010 int width, int height)
1012 struct drm_fb_helper_cmdline_mode *cmdline_mode;
1013 struct drm_display_mode *mode = NULL;
1015 cmdline_mode = &fb_helper_conn->cmdline_mode;
1016 if (cmdline_mode->specified == false)
1019 /* attempt to find a matching mode in the list of modes
1020 * we have gotten so far, if not add a CVT mode that conforms
1022 if (cmdline_mode->rb || cmdline_mode->margins)
1025 list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) {
1026 /* check width/height */
1027 if (mode->hdisplay != cmdline_mode->xres ||
1028 mode->vdisplay != cmdline_mode->yres)
1031 if (cmdline_mode->refresh_specified) {
1032 if (mode->vrefresh != cmdline_mode->refresh)
1036 if (cmdline_mode->interlace) {
1037 if (!(mode->flags & DRM_MODE_FLAG_INTERLACE))
1044 if (cmdline_mode->cvt)
1045 mode = drm_cvt_mode(fb_helper_conn->connector->dev,
1046 cmdline_mode->xres, cmdline_mode->yres,
1047 cmdline_mode->refresh_specified ? cmdline_mode->refresh : 60,
1048 cmdline_mode->rb, cmdline_mode->interlace,
1049 cmdline_mode->margins);
1051 mode = drm_gtf_mode(fb_helper_conn->connector->dev,
1052 cmdline_mode->xres, cmdline_mode->yres,
1053 cmdline_mode->refresh_specified ? cmdline_mode->refresh : 60,
1054 cmdline_mode->interlace,
1055 cmdline_mode->margins);
1056 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
1057 list_add(&mode->head, &fb_helper_conn->connector->modes);
1061 static bool drm_connector_enabled(struct drm_connector *connector, bool strict)
1066 enable = connector->status == connector_status_connected;
1068 enable = connector->status != connector_status_disconnected;
1073 static void drm_enable_connectors(struct drm_fb_helper *fb_helper,
1076 bool any_enabled = false;
1077 struct drm_connector *connector;
1080 for (i = 0; i < fb_helper->connector_count; i++) {
1081 connector = fb_helper->connector_info[i]->connector;
1082 enabled[i] = drm_connector_enabled(connector, true);
1083 DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id,
1084 enabled[i] ? "yes" : "no");
1085 any_enabled |= enabled[i];
1091 for (i = 0; i < fb_helper->connector_count; i++) {
1092 connector = fb_helper->connector_info[i]->connector;
1093 enabled[i] = drm_connector_enabled(connector, false);
1097 static bool drm_target_cloned(struct drm_fb_helper *fb_helper,
1098 struct drm_display_mode **modes,
1099 bool *enabled, int width, int height)
1102 bool can_clone = false;
1103 struct drm_fb_helper_connector *fb_helper_conn;
1104 struct drm_display_mode *dmt_mode, *mode;
1106 /* only contemplate cloning in the single crtc case */
1107 if (fb_helper->crtc_count > 1)
1111 for (i = 0; i < fb_helper->connector_count; i++) {
1116 /* only contemplate cloning if more than one connector is enabled */
1120 /* check the command line or if nothing common pick 1024x768 */
1122 for (i = 0; i < fb_helper->connector_count; i++) {
1125 fb_helper_conn = fb_helper->connector_info[i];
1126 modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height);
1131 for (j = 0; j < i; j++) {
1134 if (!drm_mode_equal(modes[j], modes[i]))
1140 DRM_DEBUG_KMS("can clone using command line\n");
1144 /* try and find a 1024x768 mode on each connector */
1146 dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60);
1148 for (i = 0; i < fb_helper->connector_count; i++) {
1153 fb_helper_conn = fb_helper->connector_info[i];
1154 list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) {
1155 if (drm_mode_equal(mode, dmt_mode))
1163 DRM_DEBUG_KMS("can clone using 1024x768\n");
1166 DRM_INFO("kms: can't enable cloning when we probably wanted to.\n");
1170 static bool drm_target_preferred(struct drm_fb_helper *fb_helper,
1171 struct drm_display_mode **modes,
1172 bool *enabled, int width, int height)
1174 struct drm_fb_helper_connector *fb_helper_conn;
1177 for (i = 0; i < fb_helper->connector_count; i++) {
1178 fb_helper_conn = fb_helper->connector_info[i];
1180 if (enabled[i] == false)
1183 DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n",
1184 fb_helper_conn->connector->base.id);
1186 /* got for command line mode first */
1187 modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height);
1189 DRM_DEBUG_KMS("looking for preferred mode on connector %d\n",
1190 fb_helper_conn->connector->base.id);
1191 modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height);
1193 /* No preferred modes, pick one off the list */
1194 if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) {
1195 list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head)
1198 DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name :
1204 static int drm_pick_crtcs(struct drm_fb_helper *fb_helper,
1205 struct drm_fb_helper_crtc **best_crtcs,
1206 struct drm_display_mode **modes,
1207 int n, int width, int height)
1210 struct drm_device *dev = fb_helper->dev;
1211 struct drm_connector *connector;
1212 struct drm_connector_helper_funcs *connector_funcs;
1213 struct drm_encoder *encoder;
1214 struct drm_fb_helper_crtc *best_crtc;
1215 int my_score, best_score, score;
1216 struct drm_fb_helper_crtc **crtcs, *crtc;
1217 struct drm_fb_helper_connector *fb_helper_conn;
1219 if (n == fb_helper->connector_count)
1222 fb_helper_conn = fb_helper->connector_info[n];
1223 connector = fb_helper_conn->connector;
1225 best_crtcs[n] = NULL;
1227 best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height);
1228 if (modes[n] == NULL)
1231 crtcs = kzalloc(dev->mode_config.num_connector *
1232 sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL);
1237 if (connector->status == connector_status_connected)
1239 if (drm_has_cmdline_mode(fb_helper_conn))
1241 if (drm_has_preferred_mode(fb_helper_conn, width, height))
1244 connector_funcs = connector->helper_private;
1245 encoder = connector_funcs->best_encoder(connector);
1249 /* select a crtc for this connector and then attempt to configure
1250 remaining connectors */
1251 for (c = 0; c < fb_helper->crtc_count; c++) {
1252 crtc = &fb_helper->crtc_info[c];
1254 if ((encoder->possible_crtcs & (1 << c)) == 0) {
1258 for (o = 0; o < n; o++)
1259 if (best_crtcs[o] == crtc)
1263 /* ignore cloning unless only a single crtc */
1264 if (fb_helper->crtc_count > 1)
1267 if (!drm_mode_equal(modes[o], modes[n]))
1272 memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *));
1273 score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1,
1275 if (score > best_score) {
1278 memcpy(best_crtcs, crtcs,
1279 dev->mode_config.num_connector *
1280 sizeof(struct drm_fb_helper_crtc *));
1288 static void drm_setup_crtcs(struct drm_fb_helper *fb_helper)
1290 struct drm_device *dev = fb_helper->dev;
1291 struct drm_fb_helper_crtc **crtcs;
1292 struct drm_display_mode **modes;
1293 struct drm_encoder *encoder;
1294 struct drm_mode_set *modeset;
1299 DRM_DEBUG_KMS("\n");
1301 width = dev->mode_config.max_width;
1302 height = dev->mode_config.max_height;
1304 /* clean out all the encoder/crtc combos */
1305 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
1306 encoder->crtc = NULL;
1309 crtcs = kcalloc(dev->mode_config.num_connector,
1310 sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL);
1311 modes = kcalloc(dev->mode_config.num_connector,
1312 sizeof(struct drm_display_mode *), GFP_KERNEL);
1313 enabled = kcalloc(dev->mode_config.num_connector,
1314 sizeof(bool), GFP_KERNEL);
1316 drm_enable_connectors(fb_helper, enabled);
1318 ret = drm_target_cloned(fb_helper, modes, enabled, width, height);
1320 ret = drm_target_preferred(fb_helper, modes, enabled, width, height);
1322 DRM_ERROR("Unable to find initial modes\n");
1325 DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width, height);
1327 drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height);
1329 /* need to set the modesets up here for use later */
1330 /* fill out the connector<->crtc mappings into the modesets */
1331 for (i = 0; i < fb_helper->crtc_count; i++) {
1332 modeset = &fb_helper->crtc_info[i].mode_set;
1333 modeset->num_connectors = 0;
1336 for (i = 0; i < fb_helper->connector_count; i++) {
1337 struct drm_display_mode *mode = modes[i];
1338 struct drm_fb_helper_crtc *fb_crtc = crtcs[i];
1339 modeset = &fb_crtc->mode_set;
1341 if (mode && fb_crtc) {
1342 DRM_DEBUG_KMS("desired mode %s set on crtc %d\n",
1343 mode->name, fb_crtc->mode_set.crtc->base.id);
1344 fb_crtc->desired_mode = mode;
1346 drm_mode_destroy(dev, modeset->mode);
1347 modeset->mode = drm_mode_duplicate(dev,
1348 fb_crtc->desired_mode);
1349 modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector;
1359 * drm_helper_initial_config - setup a sane initial connector configuration
1363 * Called at init time, must take mode config lock.
1365 * Scan the CRTCs and connectors and try to put together an initial setup.
1366 * At the moment, this is a cloned configuration across all heads with
1367 * a new framebuffer object as the backing store.
1370 * Zero if everything went ok, nonzero otherwise.
1372 bool drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel)
1374 struct drm_device *dev = fb_helper->dev;
1377 /* disable all the possible outputs/crtcs before entering KMS mode */
1378 drm_helper_disable_unused_functions(fb_helper->dev);
1380 drm_fb_helper_parse_command_line(fb_helper);
1382 count = drm_fb_helper_probe_connector_modes(fb_helper,
1383 dev->mode_config.max_width,
1384 dev->mode_config.max_height);
1386 * we shouldn't end up with no modes here.
1389 printk(KERN_INFO "No connectors reported connected with modes\n");
1391 drm_setup_crtcs(fb_helper);
1393 return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
1395 EXPORT_SYMBOL(drm_fb_helper_initial_config);
1397 bool drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper)
1400 u32 max_width, max_height, bpp_sel;
1401 bool bound = false, crtcs_bound = false;
1402 struct drm_crtc *crtc;
1407 list_for_each_entry(crtc, &fb_helper->dev->mode_config.crtc_list, head) {
1410 if (crtc->fb == fb_helper->fb)
1414 if (!bound && crtcs_bound) {
1415 fb_helper->delayed_hotplug = true;
1418 DRM_DEBUG_KMS("\n");
1420 max_width = fb_helper->fb->width;
1421 max_height = fb_helper->fb->height;
1422 bpp_sel = fb_helper->fb->bits_per_pixel;
1424 count = drm_fb_helper_probe_connector_modes(fb_helper, max_width,
1426 drm_setup_crtcs(fb_helper);
1428 return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
1430 EXPORT_SYMBOL(drm_fb_helper_hotplug_event);