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/sysrq.h>
34 #include "drm_fb_helper.h"
35 #include "drm_crtc_helper.h"
37 MODULE_AUTHOR("David Airlie, Jesse Barnes");
38 MODULE_DESCRIPTION("DRM KMS helper");
39 MODULE_LICENSE("GPL and additional rights");
41 static LIST_HEAD(kernel_fb_helper_list);
43 int drm_fb_helper_add_connector(struct drm_connector *connector)
45 connector->fb_helper_private = kzalloc(sizeof(struct drm_fb_helper_connector), GFP_KERNEL);
46 if (!connector->fb_helper_private)
51 EXPORT_SYMBOL(drm_fb_helper_add_connector);
53 static int my_atoi(const char *name)
60 val = 10*val+(*name-'0');
69 * drm_fb_helper_connector_parse_command_line - parse command line for connector
70 * @connector - connector to parse line for
71 * @mode_option - per connector mode option
73 * This parses the connector specific then generic command lines for
74 * modes and options to configure the connector.
76 * This uses the same parameters as the fb modedb.c, except for extra
77 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd]
79 * enable/enable Digital/disable bit at the end
81 static bool drm_fb_helper_connector_parse_command_line(struct drm_connector *connector,
82 const char *mode_option)
86 int res_specified = 0, bpp_specified = 0, refresh_specified = 0;
87 unsigned int xres = 0, yres = 0, bpp = 32, refresh = 0;
88 int yres_specified = 0, cvt = 0, rb = 0, interlace = 0, margins = 0;
90 enum drm_connector_force force = DRM_FORCE_UNSPECIFIED;
91 struct drm_fb_helper_connector *fb_help_conn = connector->fb_helper_private;
92 struct drm_fb_helper_cmdline_mode *cmdline_mode;
97 cmdline_mode = &fb_help_conn->cmdline_mode;
99 mode_option = fb_mode_option;
102 cmdline_mode->specified = false;
107 namelen = strlen(name);
108 for (i = namelen-1; i >= 0; i--) {
112 if (!refresh_specified && !bpp_specified &&
114 refresh = my_atoi(&name[i+1]);
115 refresh_specified = 1;
123 if (!bpp_specified && !yres_specified) {
124 bpp = my_atoi(&name[i+1]);
132 if (!yres_specified) {
133 yres = my_atoi(&name[i+1]);
156 force = DRM_FORCE_ON;
159 if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) ||
160 (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB))
161 force = DRM_FORCE_ON;
163 force = DRM_FORCE_ON_DIGITAL;
166 force = DRM_FORCE_OFF;
172 if (i < 0 && yres_specified) {
173 xres = my_atoi(name);
178 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n",
179 drm_get_connector_name(connector), xres, yres,
180 (refresh) ? refresh : 60, (rb) ? " reduced blanking" :
181 "", (margins) ? " with margins" : "", (interlace) ?
187 case DRM_FORCE_OFF: s = "OFF"; break;
188 case DRM_FORCE_ON_DIGITAL: s = "ON - dig"; break;
190 case DRM_FORCE_ON: s = "ON"; break;
193 DRM_INFO("forcing %s connector %s\n",
194 drm_get_connector_name(connector), s);
195 connector->force = force;
199 cmdline_mode->specified = true;
200 cmdline_mode->xres = xres;
201 cmdline_mode->yres = yres;
204 if (refresh_specified) {
205 cmdline_mode->refresh_specified = true;
206 cmdline_mode->refresh = refresh;
210 cmdline_mode->bpp_specified = true;
211 cmdline_mode->bpp = bpp;
213 cmdline_mode->rb = rb ? true : false;
214 cmdline_mode->cvt = cvt ? true : false;
215 cmdline_mode->interlace = interlace ? true : false;
220 int drm_fb_helper_parse_command_line(struct drm_device *dev)
222 struct drm_connector *connector;
224 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
227 /* do something on return - turn off connector maybe */
228 if (fb_get_options(drm_get_connector_name(connector), &option))
231 drm_fb_helper_connector_parse_command_line(connector, option);
236 bool drm_fb_helper_force_kernel_mode(void)
239 bool ret, error = false;
240 struct drm_fb_helper *helper;
242 if (list_empty(&kernel_fb_helper_list))
245 list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) {
246 for (i = 0; i < helper->crtc_count; i++) {
247 struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set;
248 ret = drm_crtc_helper_set_config(mode_set);
256 int drm_fb_helper_panic(struct notifier_block *n, unsigned long ununsed,
259 DRM_ERROR("panic occurred, switching back to text console\n");
260 return drm_fb_helper_force_kernel_mode();
263 EXPORT_SYMBOL(drm_fb_helper_panic);
265 static struct notifier_block paniced = {
266 .notifier_call = drm_fb_helper_panic,
270 * drm_fb_helper_restore - restore the framebuffer console (kernel) config
272 * Restore's the kernel's fbcon mode, used for lastclose & panic paths.
274 void drm_fb_helper_restore(void)
277 ret = drm_fb_helper_force_kernel_mode();
279 DRM_ERROR("Failed to restore crtc configuration\n");
281 EXPORT_SYMBOL(drm_fb_helper_restore);
283 #ifdef CONFIG_MAGIC_SYSRQ
284 static void drm_fb_helper_restore_work_fn(struct work_struct *ignored)
286 drm_fb_helper_restore();
288 static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn);
290 static void drm_fb_helper_sysrq(int dummy1, struct tty_struct *dummy3)
292 schedule_work(&drm_fb_helper_restore_work);
295 static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = {
296 .handler = drm_fb_helper_sysrq,
297 .help_msg = "force-fb(V)",
298 .action_msg = "Restore framebuffer console",
302 static void drm_fb_helper_on(struct fb_info *info)
304 struct drm_fb_helper *fb_helper = info->par;
305 struct drm_device *dev = fb_helper->dev;
306 struct drm_crtc *crtc;
307 struct drm_encoder *encoder;
311 * For each CRTC in this fb, turn the crtc on then,
312 * find all associated encoders and turn them on.
314 for (i = 0; i < fb_helper->crtc_count; i++) {
315 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
316 struct drm_crtc_helper_funcs *crtc_funcs =
317 crtc->helper_private;
319 /* Only mess with CRTCs in this fb */
320 if (crtc->base.id != fb_helper->crtc_info[i].crtc_id ||
324 mutex_lock(&dev->mode_config.mutex);
325 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
326 mutex_unlock(&dev->mode_config.mutex);
328 /* Found a CRTC on this fb, now find encoders */
329 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
330 if (encoder->crtc == crtc) {
331 struct drm_encoder_helper_funcs *encoder_funcs;
333 encoder_funcs = encoder->helper_private;
334 mutex_lock(&dev->mode_config.mutex);
335 encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
336 mutex_unlock(&dev->mode_config.mutex);
343 static void drm_fb_helper_off(struct fb_info *info, int dpms_mode)
345 struct drm_fb_helper *fb_helper = info->par;
346 struct drm_device *dev = fb_helper->dev;
347 struct drm_crtc *crtc;
348 struct drm_encoder *encoder;
352 * For each CRTC in this fb, find all associated encoders
353 * and turn them off, then turn off the CRTC.
355 for (i = 0; i < fb_helper->crtc_count; i++) {
356 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
357 struct drm_crtc_helper_funcs *crtc_funcs =
358 crtc->helper_private;
360 /* Only mess with CRTCs in this fb */
361 if (crtc->base.id != fb_helper->crtc_info[i].crtc_id ||
365 /* Found a CRTC on this fb, now find encoders */
366 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
367 if (encoder->crtc == crtc) {
368 struct drm_encoder_helper_funcs *encoder_funcs;
370 encoder_funcs = encoder->helper_private;
371 mutex_lock(&dev->mode_config.mutex);
372 encoder_funcs->dpms(encoder, dpms_mode);
373 mutex_unlock(&dev->mode_config.mutex);
376 if (dpms_mode == DRM_MODE_DPMS_OFF) {
377 mutex_lock(&dev->mode_config.mutex);
378 crtc_funcs->dpms(crtc, dpms_mode);
379 mutex_unlock(&dev->mode_config.mutex);
385 int drm_fb_helper_blank(int blank, struct fb_info *info)
388 case FB_BLANK_UNBLANK:
389 drm_fb_helper_on(info);
391 case FB_BLANK_NORMAL:
392 drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
394 case FB_BLANK_HSYNC_SUSPEND:
395 drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
397 case FB_BLANK_VSYNC_SUSPEND:
398 drm_fb_helper_off(info, DRM_MODE_DPMS_SUSPEND);
400 case FB_BLANK_POWERDOWN:
401 drm_fb_helper_off(info, DRM_MODE_DPMS_OFF);
406 EXPORT_SYMBOL(drm_fb_helper_blank);
408 static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper)
412 for (i = 0; i < helper->crtc_count; i++)
413 kfree(helper->crtc_info[i].mode_set.connectors);
414 kfree(helper->crtc_info);
417 int drm_fb_helper_init_crtc_count(struct drm_fb_helper *helper, int crtc_count, int max_conn_count)
419 struct drm_device *dev = helper->dev;
420 struct drm_crtc *crtc;
424 helper->crtc_info = kcalloc(crtc_count, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL);
425 if (!helper->crtc_info)
428 helper->crtc_count = crtc_count;
430 for (i = 0; i < crtc_count; i++) {
431 helper->crtc_info[i].mode_set.connectors =
432 kcalloc(max_conn_count,
433 sizeof(struct drm_connector *),
436 if (!helper->crtc_info[i].mode_set.connectors) {
440 helper->crtc_info[i].mode_set.num_connectors = 0;
444 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
445 helper->crtc_info[i].crtc_id = crtc->base.id;
446 helper->crtc_info[i].mode_set.crtc = crtc;
449 helper->conn_limit = max_conn_count;
452 drm_fb_helper_crtc_free(helper);
455 EXPORT_SYMBOL(drm_fb_helper_init_crtc_count);
457 int drm_fb_helper_setcolreg(unsigned regno,
462 struct fb_info *info)
464 struct drm_fb_helper *fb_helper = info->par;
465 struct drm_device *dev = fb_helper->dev;
466 struct drm_crtc *crtc;
469 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
470 struct drm_framebuffer *fb = fb_helper->fb;
472 for (i = 0; i < fb_helper->crtc_count; i++) {
473 if (crtc->base.id == fb_helper->crtc_info[i].crtc_id)
476 if (i == fb_helper->crtc_count)
482 if (fb->depth == 8) {
483 fb_helper->funcs->gamma_set(crtc, red, green, blue, regno);
490 fb->pseudo_palette[regno] = ((red & 0xf800) >> 1) |
491 ((green & 0xf800) >> 6) |
492 ((blue & 0xf800) >> 11);
495 fb->pseudo_palette[regno] = (red & 0xf800) |
496 ((green & 0xfc00) >> 5) |
497 ((blue & 0xf800) >> 11);
501 fb->pseudo_palette[regno] =
502 (((red >> 8) & 0xff) << info->var.red.offset) |
503 (((green >> 8) & 0xff) << info->var.green.offset) |
504 (((blue >> 8) & 0xff) << info->var.blue.offset);
511 EXPORT_SYMBOL(drm_fb_helper_setcolreg);
513 int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
514 struct fb_info *info)
516 struct drm_fb_helper *fb_helper = info->par;
517 struct drm_framebuffer *fb = fb_helper->fb;
520 if (var->pixclock == -1 || !var->pixclock)
523 /* Need to resize the fb object !!! */
524 if (var->xres > fb->width || var->yres > fb->height) {
525 DRM_ERROR("Requested width/height is greater than current fb "
526 "object %dx%d > %dx%d\n", var->xres, var->yres,
527 fb->width, fb->height);
528 DRM_ERROR("Need resizing code.\n");
532 switch (var->bits_per_pixel) {
534 depth = (var->green.length == 6) ? 16 : 15;
537 depth = (var->transp.length > 0) ? 32 : 24;
540 depth = var->bits_per_pixel;
547 var->green.offset = 0;
548 var->blue.offset = 0;
550 var->green.length = 8;
551 var->blue.length = 8;
552 var->transp.length = 0;
553 var->transp.offset = 0;
556 var->red.offset = 10;
557 var->green.offset = 5;
558 var->blue.offset = 0;
560 var->green.length = 5;
561 var->blue.length = 5;
562 var->transp.length = 1;
563 var->transp.offset = 15;
566 var->red.offset = 11;
567 var->green.offset = 5;
568 var->blue.offset = 0;
570 var->green.length = 6;
571 var->blue.length = 5;
572 var->transp.length = 0;
573 var->transp.offset = 0;
576 var->red.offset = 16;
577 var->green.offset = 8;
578 var->blue.offset = 0;
580 var->green.length = 8;
581 var->blue.length = 8;
582 var->transp.length = 0;
583 var->transp.offset = 0;
586 var->red.offset = 16;
587 var->green.offset = 8;
588 var->blue.offset = 0;
590 var->green.length = 8;
591 var->blue.length = 8;
592 var->transp.length = 8;
593 var->transp.offset = 24;
600 EXPORT_SYMBOL(drm_fb_helper_check_var);
602 /* this will let fbcon do the mode init */
603 int drm_fb_helper_set_par(struct fb_info *info)
605 struct drm_fb_helper *fb_helper = info->par;
606 struct drm_device *dev = fb_helper->dev;
607 struct fb_var_screeninfo *var = &info->var;
608 struct drm_crtc *crtc;
612 if (var->pixclock != -1) {
613 DRM_ERROR("PIXEL CLCOK SET\n");
617 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
619 for (i = 0; i < fb_helper->crtc_count; i++) {
620 if (crtc->base.id == fb_helper->crtc_info[i].crtc_id)
623 if (i == fb_helper->crtc_count)
626 if (crtc->fb == fb_helper->crtc_info[i].mode_set.fb) {
627 mutex_lock(&dev->mode_config.mutex);
628 ret = crtc->funcs->set_config(&fb_helper->crtc_info->mode_set);
629 mutex_unlock(&dev->mode_config.mutex);
636 EXPORT_SYMBOL(drm_fb_helper_set_par);
638 int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
639 struct fb_info *info)
641 struct drm_fb_helper *fb_helper = info->par;
642 struct drm_device *dev = fb_helper->dev;
643 struct drm_mode_set *modeset;
644 struct drm_crtc *crtc;
648 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
649 for (i = 0; i < fb_helper->crtc_count; i++) {
650 if (crtc->base.id == fb_helper->crtc_info[i].crtc_id)
654 if (i == fb_helper->crtc_count)
657 modeset = &fb_helper->crtc_info[i].mode_set;
659 modeset->x = var->xoffset;
660 modeset->y = var->yoffset;
662 if (modeset->num_connectors) {
663 mutex_lock(&dev->mode_config.mutex);
664 ret = crtc->funcs->set_config(modeset);
665 mutex_unlock(&dev->mode_config.mutex);
667 info->var.xoffset = var->xoffset;
668 info->var.yoffset = var->yoffset;
674 EXPORT_SYMBOL(drm_fb_helper_pan_display);
676 int drm_fb_helper_single_fb_probe(struct drm_device *dev,
677 int (*fb_create)(struct drm_device *dev,
680 uint32_t surface_width,
681 uint32_t surface_height,
682 uint32_t surface_depth,
683 uint32_t surface_bpp,
684 struct drm_framebuffer **fb_ptr))
686 struct drm_crtc *crtc;
687 struct drm_connector *connector;
688 unsigned int fb_width = (unsigned)-1, fb_height = (unsigned)-1;
689 unsigned int surface_width = 0, surface_height = 0;
692 int ret, i, conn_count = 0;
693 struct fb_info *info;
694 struct drm_framebuffer *fb;
695 struct drm_mode_set *modeset = NULL;
696 struct drm_fb_helper *fb_helper;
697 uint32_t surface_depth = 24, surface_bpp = 32;
699 /* first up get a count of crtcs now in use and new min/maxes width/heights */
700 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
701 struct drm_fb_helper_connector *fb_help_conn = connector->fb_helper_private;
703 struct drm_fb_helper_cmdline_mode *cmdline_mode;
708 cmdline_mode = &fb_help_conn->cmdline_mode;
710 if (cmdline_mode->bpp_specified) {
711 switch (cmdline_mode->bpp) {
713 surface_depth = surface_bpp = 8;
720 surface_depth = surface_bpp = 16;
723 surface_depth = surface_bpp = 24;
734 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
735 if (drm_helper_crtc_in_use(crtc)) {
736 if (crtc->desired_mode) {
737 if (crtc->desired_mode->hdisplay < fb_width)
738 fb_width = crtc->desired_mode->hdisplay;
740 if (crtc->desired_mode->vdisplay < fb_height)
741 fb_height = crtc->desired_mode->vdisplay;
743 if (crtc->desired_mode->hdisplay > surface_width)
744 surface_width = crtc->desired_mode->hdisplay;
746 if (crtc->desired_mode->vdisplay > surface_height)
747 surface_height = crtc->desired_mode->vdisplay;
753 if (crtc_count == 0 || fb_width == -1 || fb_height == -1) {
754 /* hmm everyone went away - assume VGA cable just fell out
755 and will come back later. */
759 /* do we have an fb already? */
760 if (list_empty(&dev->mode_config.fb_kernel_list)) {
761 ret = (*fb_create)(dev, fb_width, fb_height, surface_width,
762 surface_height, surface_depth, surface_bpp,
768 fb = list_first_entry(&dev->mode_config.fb_kernel_list,
769 struct drm_framebuffer, filp_head);
771 /* if someone hotplugs something bigger than we have already allocated, we are pwned.
772 As really we can't resize an fbdev that is in the wild currently due to fbdev
773 not really being designed for the lower layers moving stuff around under it.
774 - so in the grand style of things - punt. */
775 if ((fb->width < surface_width) ||
776 (fb->height < surface_height)) {
777 DRM_ERROR("Framebuffer not large enough to scale console onto.\n");
783 fb_helper = info->par;
786 /* okay we need to setup new connector sets in the crtcs */
787 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
788 modeset = &fb_helper->crtc_info[crtc_count].mode_set;
791 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
792 if (connector->encoder)
793 if (connector->encoder->crtc == modeset->crtc) {
794 modeset->connectors[conn_count] = connector;
796 if (conn_count > fb_helper->conn_limit)
801 for (i = conn_count; i < fb_helper->conn_limit; i++)
802 modeset->connectors[i] = NULL;
804 modeset->crtc = crtc;
807 modeset->num_connectors = conn_count;
808 if (modeset->crtc->desired_mode) {
810 drm_mode_destroy(dev, modeset->mode);
811 modeset->mode = drm_mode_duplicate(dev,
812 modeset->crtc->desired_mode);
815 fb_helper->crtc_count = crtc_count;
819 info->var.pixclock = -1;
820 if (register_framebuffer(info) < 0)
823 drm_fb_helper_set_par(info);
825 printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
828 /* Switch back to kernel console on panic */
829 /* multi card linked list maybe */
830 if (list_empty(&kernel_fb_helper_list)) {
831 printk(KERN_INFO "registered panic notifier\n");
832 atomic_notifier_chain_register(&panic_notifier_list,
834 register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op);
836 list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list);
839 EXPORT_SYMBOL(drm_fb_helper_single_fb_probe);
841 void drm_fb_helper_free(struct drm_fb_helper *helper)
843 list_del(&helper->kernel_fb_list);
844 if (list_empty(&kernel_fb_helper_list)) {
845 printk(KERN_INFO "unregistered panic notifier\n");
846 atomic_notifier_chain_unregister(&panic_notifier_list,
848 unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op);
850 drm_fb_helper_crtc_free(helper);
852 EXPORT_SYMBOL(drm_fb_helper_free);
854 void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch)
856 info->fix.type = FB_TYPE_PACKED_PIXELS;
857 info->fix.visual = FB_VISUAL_TRUECOLOR;
858 info->fix.type_aux = 0;
859 info->fix.xpanstep = 1; /* doing it in hw */
860 info->fix.ypanstep = 1; /* doing it in hw */
861 info->fix.ywrapstep = 0;
862 info->fix.accel = FB_ACCEL_NONE;
863 info->fix.type_aux = 0;
865 info->fix.line_length = pitch;
868 EXPORT_SYMBOL(drm_fb_helper_fill_fix);
870 void drm_fb_helper_fill_var(struct fb_info *info, struct drm_framebuffer *fb,
871 uint32_t fb_width, uint32_t fb_height)
873 info->pseudo_palette = fb->pseudo_palette;
874 info->var.xres_virtual = fb->width;
875 info->var.yres_virtual = fb->height;
876 info->var.bits_per_pixel = fb->bits_per_pixel;
877 info->var.xoffset = 0;
878 info->var.yoffset = 0;
879 info->var.activate = FB_ACTIVATE_NOW;
880 info->var.height = -1;
881 info->var.width = -1;
885 info->var.red.offset = 0;
886 info->var.green.offset = 0;
887 info->var.blue.offset = 0;
888 info->var.red.length = 8; /* 8bit DAC */
889 info->var.green.length = 8;
890 info->var.blue.length = 8;
891 info->var.transp.offset = 0;
892 info->var.transp.length = 0;
895 info->var.red.offset = 10;
896 info->var.green.offset = 5;
897 info->var.blue.offset = 0;
898 info->var.red.length = 5;
899 info->var.green.length = 5;
900 info->var.blue.length = 5;
901 info->var.transp.offset = 15;
902 info->var.transp.length = 1;
905 info->var.red.offset = 11;
906 info->var.green.offset = 5;
907 info->var.blue.offset = 0;
908 info->var.red.length = 5;
909 info->var.green.length = 6;
910 info->var.blue.length = 5;
911 info->var.transp.offset = 0;
914 info->var.red.offset = 16;
915 info->var.green.offset = 8;
916 info->var.blue.offset = 0;
917 info->var.red.length = 8;
918 info->var.green.length = 8;
919 info->var.blue.length = 8;
920 info->var.transp.offset = 0;
921 info->var.transp.length = 0;
924 info->var.red.offset = 16;
925 info->var.green.offset = 8;
926 info->var.blue.offset = 0;
927 info->var.red.length = 8;
928 info->var.green.length = 8;
929 info->var.blue.length = 8;
930 info->var.transp.offset = 24;
931 info->var.transp.length = 8;
937 info->var.xres = fb_width;
938 info->var.yres = fb_height;
940 EXPORT_SYMBOL(drm_fb_helper_fill_var);