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 DRM_ERROR("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_encoder
*encoder
;
322 * For each CRTC in this fb, turn the crtc on then,
323 * find all associated encoders and turn them on.
325 mutex_lock(&dev
->mode_config
.mutex
);
326 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
327 crtc
= fb_helper
->crtc_info
[i
].mode_set
.crtc
;
328 crtc_funcs
= crtc
->helper_private
;
333 crtc_funcs
->dpms(crtc
, DRM_MODE_DPMS_ON
);
336 /* Found a CRTC on this fb, now find encoders */
337 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
338 if (encoder
->crtc
== crtc
) {
339 struct drm_encoder_helper_funcs
*encoder_funcs
;
341 encoder_funcs
= encoder
->helper_private
;
342 encoder_funcs
->dpms(encoder
, DRM_MODE_DPMS_ON
);
346 mutex_unlock(&dev
->mode_config
.mutex
);
349 static void drm_fb_helper_off(struct fb_info
*info
, int dpms_mode
)
351 struct drm_fb_helper
*fb_helper
= info
->par
;
352 struct drm_device
*dev
= fb_helper
->dev
;
353 struct drm_crtc
*crtc
;
354 struct drm_crtc_helper_funcs
*crtc_funcs
;
355 struct drm_encoder
*encoder
;
359 * For each CRTC in this fb, find all associated encoders
360 * and turn them off, then turn off the CRTC.
362 mutex_lock(&dev
->mode_config
.mutex
);
363 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
364 crtc
= fb_helper
->crtc_info
[i
].mode_set
.crtc
;
365 crtc_funcs
= crtc
->helper_private
;
370 /* Found a CRTC on this fb, now find encoders */
371 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
372 if (encoder
->crtc
== crtc
) {
373 struct drm_encoder_helper_funcs
*encoder_funcs
;
375 encoder_funcs
= encoder
->helper_private
;
376 encoder_funcs
->dpms(encoder
, dpms_mode
);
379 crtc_funcs
->dpms(crtc
, DRM_MODE_DPMS_OFF
);
381 mutex_unlock(&dev
->mode_config
.mutex
);
384 int drm_fb_helper_blank(int blank
, struct fb_info
*info
)
387 /* Display: On; HSync: On, VSync: On */
388 case FB_BLANK_UNBLANK
:
389 drm_fb_helper_on(info
);
391 /* Display: Off; HSync: On, VSync: On */
392 case FB_BLANK_NORMAL
:
393 drm_fb_helper_off(info
, DRM_MODE_DPMS_STANDBY
);
395 /* Display: Off; HSync: Off, VSync: On */
396 case FB_BLANK_HSYNC_SUSPEND
:
397 drm_fb_helper_off(info
, DRM_MODE_DPMS_STANDBY
);
399 /* Display: Off; HSync: On, VSync: Off */
400 case FB_BLANK_VSYNC_SUSPEND
:
401 drm_fb_helper_off(info
, DRM_MODE_DPMS_SUSPEND
);
403 /* Display: Off; HSync: Off, VSync: Off */
404 case FB_BLANK_POWERDOWN
:
405 drm_fb_helper_off(info
, DRM_MODE_DPMS_OFF
);
410 EXPORT_SYMBOL(drm_fb_helper_blank
);
412 static void drm_fb_helper_crtc_free(struct drm_fb_helper
*helper
)
416 for (i
= 0; i
< helper
->connector_count
; i
++)
417 kfree(helper
->connector_info
[i
]);
418 kfree(helper
->connector_info
);
419 for (i
= 0; i
< helper
->crtc_count
; i
++)
420 kfree(helper
->crtc_info
[i
].mode_set
.connectors
);
421 kfree(helper
->crtc_info
);
424 int drm_fb_helper_init(struct drm_device
*dev
,
425 struct drm_fb_helper
*fb_helper
,
426 int crtc_count
, int max_conn_count
)
428 struct drm_crtc
*crtc
;
432 fb_helper
->dev
= dev
;
434 INIT_LIST_HEAD(&fb_helper
->kernel_fb_list
);
436 fb_helper
->crtc_info
= kcalloc(crtc_count
, sizeof(struct drm_fb_helper_crtc
), GFP_KERNEL
);
437 if (!fb_helper
->crtc_info
)
440 fb_helper
->crtc_count
= crtc_count
;
441 fb_helper
->connector_info
= kcalloc(dev
->mode_config
.num_connector
, sizeof(struct drm_fb_helper_connector
*), GFP_KERNEL
);
442 if (!fb_helper
->connector_info
) {
443 kfree(fb_helper
->crtc_info
);
446 fb_helper
->connector_count
= 0;
448 for (i
= 0; i
< crtc_count
; i
++) {
449 fb_helper
->crtc_info
[i
].mode_set
.connectors
=
450 kcalloc(max_conn_count
,
451 sizeof(struct drm_connector
*),
454 if (!fb_helper
->crtc_info
[i
].mode_set
.connectors
) {
458 fb_helper
->crtc_info
[i
].mode_set
.num_connectors
= 0;
462 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
463 fb_helper
->crtc_info
[i
].crtc_id
= crtc
->base
.id
;
464 fb_helper
->crtc_info
[i
].mode_set
.crtc
= crtc
;
467 fb_helper
->conn_limit
= max_conn_count
;
470 drm_fb_helper_crtc_free(fb_helper
);
473 EXPORT_SYMBOL(drm_fb_helper_init
);
475 void drm_fb_helper_fini(struct drm_fb_helper
*fb_helper
)
477 if (!list_empty(&fb_helper
->kernel_fb_list
)) {
478 list_del(&fb_helper
->kernel_fb_list
);
479 if (list_empty(&kernel_fb_helper_list
)) {
480 printk(KERN_INFO
"drm: unregistered panic notifier\n");
481 atomic_notifier_chain_unregister(&panic_notifier_list
,
483 unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op
);
487 drm_fb_helper_crtc_free(fb_helper
);
490 EXPORT_SYMBOL(drm_fb_helper_fini
);
492 static int setcolreg(struct drm_crtc
*crtc
, u16 red
, u16 green
,
493 u16 blue
, u16 regno
, struct fb_info
*info
)
495 struct drm_fb_helper
*fb_helper
= info
->par
;
496 struct drm_framebuffer
*fb
= fb_helper
->fb
;
499 if (info
->fix
.visual
== FB_VISUAL_TRUECOLOR
) {
502 /* place color in psuedopalette */
505 palette
= (u32
*)info
->pseudo_palette
;
506 red
>>= (16 - info
->var
.red
.length
);
507 green
>>= (16 - info
->var
.green
.length
);
508 blue
>>= (16 - info
->var
.blue
.length
);
509 value
= (red
<< info
->var
.red
.offset
) |
510 (green
<< info
->var
.green
.offset
) |
511 (blue
<< info
->var
.blue
.offset
);
512 palette
[regno
] = value
;
518 if (fb
->bits_per_pixel
== 16) {
521 if (fb
->depth
== 16 && regno
> 63)
523 if (fb
->depth
== 15 && regno
> 31)
526 if (fb
->depth
== 16) {
530 for (i
= 0; i
< 8; i
++)
531 fb_helper
->funcs
->gamma_set(crtc
, red
,
532 green
, blue
, pindex
+ i
);
535 fb_helper
->funcs
->gamma_get(crtc
, &r
,
539 for (i
= 0; i
< 4; i
++)
540 fb_helper
->funcs
->gamma_set(crtc
, r
,
547 fb_helper
->funcs
->gamma_set(crtc
, red
, green
, blue
, pindex
);
551 int drm_fb_helper_setcmap(struct fb_cmap
*cmap
, struct fb_info
*info
)
553 struct drm_fb_helper
*fb_helper
= info
->par
;
554 struct drm_crtc_helper_funcs
*crtc_funcs
;
555 u16
*red
, *green
, *blue
, *transp
;
556 struct drm_crtc
*crtc
;
560 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
561 crtc
= fb_helper
->crtc_info
[i
].mode_set
.crtc
;
562 crtc_funcs
= crtc
->helper_private
;
567 transp
= cmap
->transp
;
570 for (i
= 0; i
< cmap
->len
; i
++) {
571 u16 hred
, hgreen
, hblue
, htransp
= 0xffff;
580 rc
= setcolreg(crtc
, hred
, hgreen
, hblue
, start
++, info
);
584 crtc_funcs
->load_lut(crtc
);
588 EXPORT_SYMBOL(drm_fb_helper_setcmap
);
590 int drm_fb_helper_check_var(struct fb_var_screeninfo
*var
,
591 struct fb_info
*info
)
593 struct drm_fb_helper
*fb_helper
= info
->par
;
594 struct drm_framebuffer
*fb
= fb_helper
->fb
;
597 if (var
->pixclock
!= 0)
600 /* Need to resize the fb object !!! */
601 if (var
->bits_per_pixel
> fb
->bits_per_pixel
|| var
->xres
> fb
->width
|| var
->yres
> fb
->height
) {
602 DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb "
603 "object %dx%d-%d > %dx%d-%d\n", var
->xres
, var
->yres
, var
->bits_per_pixel
,
604 fb
->width
, fb
->height
, fb
->bits_per_pixel
);
608 switch (var
->bits_per_pixel
) {
610 depth
= (var
->green
.length
== 6) ? 16 : 15;
613 depth
= (var
->transp
.length
> 0) ? 32 : 24;
616 depth
= var
->bits_per_pixel
;
623 var
->green
.offset
= 0;
624 var
->blue
.offset
= 0;
626 var
->green
.length
= 8;
627 var
->blue
.length
= 8;
628 var
->transp
.length
= 0;
629 var
->transp
.offset
= 0;
632 var
->red
.offset
= 10;
633 var
->green
.offset
= 5;
634 var
->blue
.offset
= 0;
636 var
->green
.length
= 5;
637 var
->blue
.length
= 5;
638 var
->transp
.length
= 1;
639 var
->transp
.offset
= 15;
642 var
->red
.offset
= 11;
643 var
->green
.offset
= 5;
644 var
->blue
.offset
= 0;
646 var
->green
.length
= 6;
647 var
->blue
.length
= 5;
648 var
->transp
.length
= 0;
649 var
->transp
.offset
= 0;
652 var
->red
.offset
= 16;
653 var
->green
.offset
= 8;
654 var
->blue
.offset
= 0;
656 var
->green
.length
= 8;
657 var
->blue
.length
= 8;
658 var
->transp
.length
= 0;
659 var
->transp
.offset
= 0;
662 var
->red
.offset
= 16;
663 var
->green
.offset
= 8;
664 var
->blue
.offset
= 0;
666 var
->green
.length
= 8;
667 var
->blue
.length
= 8;
668 var
->transp
.length
= 8;
669 var
->transp
.offset
= 24;
676 EXPORT_SYMBOL(drm_fb_helper_check_var
);
678 /* this will let fbcon do the mode init */
679 int drm_fb_helper_set_par(struct fb_info
*info
)
681 struct drm_fb_helper
*fb_helper
= info
->par
;
682 struct drm_device
*dev
= fb_helper
->dev
;
683 struct fb_var_screeninfo
*var
= &info
->var
;
684 struct drm_crtc
*crtc
;
688 if (var
->pixclock
!= 0) {
689 DRM_ERROR("PIXEL CLOCK SET\n");
693 mutex_lock(&dev
->mode_config
.mutex
);
694 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
695 crtc
= fb_helper
->crtc_info
[i
].mode_set
.crtc
;
696 ret
= crtc
->funcs
->set_config(&fb_helper
->crtc_info
[i
].mode_set
);
698 mutex_unlock(&dev
->mode_config
.mutex
);
702 mutex_unlock(&dev
->mode_config
.mutex
);
704 if (fb_helper
->delayed_hotplug
) {
705 fb_helper
->delayed_hotplug
= false;
706 drm_fb_helper_hotplug_event(fb_helper
);
710 EXPORT_SYMBOL(drm_fb_helper_set_par
);
712 int drm_fb_helper_pan_display(struct fb_var_screeninfo
*var
,
713 struct fb_info
*info
)
715 struct drm_fb_helper
*fb_helper
= info
->par
;
716 struct drm_device
*dev
= fb_helper
->dev
;
717 struct drm_mode_set
*modeset
;
718 struct drm_crtc
*crtc
;
722 mutex_lock(&dev
->mode_config
.mutex
);
723 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
724 crtc
= fb_helper
->crtc_info
[i
].mode_set
.crtc
;
726 modeset
= &fb_helper
->crtc_info
[i
].mode_set
;
728 modeset
->x
= var
->xoffset
;
729 modeset
->y
= var
->yoffset
;
731 if (modeset
->num_connectors
) {
732 ret
= crtc
->funcs
->set_config(modeset
);
734 info
->var
.xoffset
= var
->xoffset
;
735 info
->var
.yoffset
= var
->yoffset
;
739 mutex_unlock(&dev
->mode_config
.mutex
);
742 EXPORT_SYMBOL(drm_fb_helper_pan_display
);
744 int drm_fb_helper_single_fb_probe(struct drm_fb_helper
*fb_helper
,
750 struct fb_info
*info
;
751 struct drm_fb_helper_surface_size sizes
;
754 memset(&sizes
, 0, sizeof(struct drm_fb_helper_surface_size
));
755 sizes
.surface_depth
= 24;
756 sizes
.surface_bpp
= 32;
757 sizes
.fb_width
= (unsigned)-1;
758 sizes
.fb_height
= (unsigned)-1;
760 /* if driver picks 8 or 16 by default use that
761 for both depth/bpp */
762 if (preferred_bpp
!= sizes
.surface_bpp
) {
763 sizes
.surface_depth
= sizes
.surface_bpp
= preferred_bpp
;
765 /* first up get a count of crtcs now in use and new min/maxes width/heights */
766 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
767 struct drm_fb_helper_connector
*fb_helper_conn
= fb_helper
->connector_info
[i
];
768 struct drm_fb_helper_cmdline_mode
*cmdline_mode
;
770 cmdline_mode
= &fb_helper_conn
->cmdline_mode
;
772 if (cmdline_mode
->bpp_specified
) {
773 switch (cmdline_mode
->bpp
) {
775 sizes
.surface_depth
= sizes
.surface_bpp
= 8;
778 sizes
.surface_depth
= 15;
779 sizes
.surface_bpp
= 16;
782 sizes
.surface_depth
= sizes
.surface_bpp
= 16;
785 sizes
.surface_depth
= sizes
.surface_bpp
= 24;
788 sizes
.surface_depth
= 24;
789 sizes
.surface_bpp
= 32;
797 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
798 struct drm_display_mode
*desired_mode
;
799 desired_mode
= fb_helper
->crtc_info
[i
].desired_mode
;
803 gamma_size
= fb_helper
->crtc_info
[i
].mode_set
.crtc
->gamma_size
;
804 if (desired_mode
->hdisplay
< sizes
.fb_width
)
805 sizes
.fb_width
= desired_mode
->hdisplay
;
806 if (desired_mode
->vdisplay
< sizes
.fb_height
)
807 sizes
.fb_height
= desired_mode
->vdisplay
;
808 if (desired_mode
->hdisplay
> sizes
.surface_width
)
809 sizes
.surface_width
= desired_mode
->hdisplay
;
810 if (desired_mode
->vdisplay
> sizes
.surface_height
)
811 sizes
.surface_height
= desired_mode
->vdisplay
;
816 if (crtc_count
== 0 || sizes
.fb_width
== -1 || sizes
.fb_height
== -1) {
817 /* hmm everyone went away - assume VGA cable just fell out
818 and will come back later. */
819 DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n");
820 sizes
.fb_width
= sizes
.surface_width
= 1024;
821 sizes
.fb_height
= sizes
.surface_height
= 768;
824 /* push down into drivers */
825 new_fb
= (*fb_helper
->funcs
->fb_probe
)(fb_helper
, &sizes
);
829 info
= fb_helper
->fbdev
;
831 /* set the fb pointer */
832 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
833 fb_helper
->crtc_info
[i
].mode_set
.fb
= fb_helper
->fb
;
837 info
->var
.pixclock
= 0;
838 if (register_framebuffer(info
) < 0) {
842 printk(KERN_INFO
"fb%d: %s frame buffer device\n", info
->node
,
846 drm_fb_helper_set_par(info
);
849 /* Switch back to kernel console on panic */
850 /* multi card linked list maybe */
851 if (list_empty(&kernel_fb_helper_list
)) {
852 printk(KERN_INFO
"drm: registered panic notifier\n");
853 atomic_notifier_chain_register(&panic_notifier_list
,
855 register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op
);
858 list_add(&fb_helper
->kernel_fb_list
, &kernel_fb_helper_list
);
862 EXPORT_SYMBOL(drm_fb_helper_single_fb_probe
);
864 void drm_fb_helper_fill_fix(struct fb_info
*info
, uint32_t pitch
,
867 info
->fix
.type
= FB_TYPE_PACKED_PIXELS
;
868 info
->fix
.visual
= depth
== 8 ? FB_VISUAL_PSEUDOCOLOR
:
870 info
->fix
.type_aux
= 0;
871 info
->fix
.xpanstep
= 1; /* doing it in hw */
872 info
->fix
.ypanstep
= 1; /* doing it in hw */
873 info
->fix
.ywrapstep
= 0;
874 info
->fix
.accel
= FB_ACCEL_NONE
;
875 info
->fix
.type_aux
= 0;
877 info
->fix
.line_length
= pitch
;
880 EXPORT_SYMBOL(drm_fb_helper_fill_fix
);
882 void drm_fb_helper_fill_var(struct fb_info
*info
, struct drm_fb_helper
*fb_helper
,
883 uint32_t fb_width
, uint32_t fb_height
)
885 struct drm_framebuffer
*fb
= fb_helper
->fb
;
886 info
->pseudo_palette
= fb_helper
->pseudo_palette
;
887 info
->var
.xres_virtual
= fb
->width
;
888 info
->var
.yres_virtual
= fb
->height
;
889 info
->var
.bits_per_pixel
= fb
->bits_per_pixel
;
890 info
->var
.xoffset
= 0;
891 info
->var
.yoffset
= 0;
892 info
->var
.activate
= FB_ACTIVATE_NOW
;
893 info
->var
.height
= -1;
894 info
->var
.width
= -1;
898 info
->var
.red
.offset
= 0;
899 info
->var
.green
.offset
= 0;
900 info
->var
.blue
.offset
= 0;
901 info
->var
.red
.length
= 8; /* 8bit DAC */
902 info
->var
.green
.length
= 8;
903 info
->var
.blue
.length
= 8;
904 info
->var
.transp
.offset
= 0;
905 info
->var
.transp
.length
= 0;
908 info
->var
.red
.offset
= 10;
909 info
->var
.green
.offset
= 5;
910 info
->var
.blue
.offset
= 0;
911 info
->var
.red
.length
= 5;
912 info
->var
.green
.length
= 5;
913 info
->var
.blue
.length
= 5;
914 info
->var
.transp
.offset
= 15;
915 info
->var
.transp
.length
= 1;
918 info
->var
.red
.offset
= 11;
919 info
->var
.green
.offset
= 5;
920 info
->var
.blue
.offset
= 0;
921 info
->var
.red
.length
= 5;
922 info
->var
.green
.length
= 6;
923 info
->var
.blue
.length
= 5;
924 info
->var
.transp
.offset
= 0;
927 info
->var
.red
.offset
= 16;
928 info
->var
.green
.offset
= 8;
929 info
->var
.blue
.offset
= 0;
930 info
->var
.red
.length
= 8;
931 info
->var
.green
.length
= 8;
932 info
->var
.blue
.length
= 8;
933 info
->var
.transp
.offset
= 0;
934 info
->var
.transp
.length
= 0;
937 info
->var
.red
.offset
= 16;
938 info
->var
.green
.offset
= 8;
939 info
->var
.blue
.offset
= 0;
940 info
->var
.red
.length
= 8;
941 info
->var
.green
.length
= 8;
942 info
->var
.blue
.length
= 8;
943 info
->var
.transp
.offset
= 24;
944 info
->var
.transp
.length
= 8;
950 info
->var
.xres
= fb_width
;
951 info
->var
.yres
= fb_height
;
953 EXPORT_SYMBOL(drm_fb_helper_fill_var
);
955 static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper
*fb_helper
,
959 struct drm_connector
*connector
;
963 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
964 connector
= fb_helper
->connector_info
[i
]->connector
;
965 count
+= connector
->funcs
->fill_modes(connector
, maxX
, maxY
);
971 static struct drm_display_mode
*drm_has_preferred_mode(struct drm_fb_helper_connector
*fb_connector
, int width
, int height
)
973 struct drm_display_mode
*mode
;
975 list_for_each_entry(mode
, &fb_connector
->connector
->modes
, head
) {
976 if (drm_mode_width(mode
) > width
||
977 drm_mode_height(mode
) > height
)
979 if (mode
->type
& DRM_MODE_TYPE_PREFERRED
)
985 static bool drm_has_cmdline_mode(struct drm_fb_helper_connector
*fb_connector
)
987 struct drm_fb_helper_cmdline_mode
*cmdline_mode
;
988 cmdline_mode
= &fb_connector
->cmdline_mode
;
989 return cmdline_mode
->specified
;
992 static struct drm_display_mode
*drm_pick_cmdline_mode(struct drm_fb_helper_connector
*fb_helper_conn
,
993 int width
, int height
)
995 struct drm_fb_helper_cmdline_mode
*cmdline_mode
;
996 struct drm_display_mode
*mode
= NULL
;
998 cmdline_mode
= &fb_helper_conn
->cmdline_mode
;
999 if (cmdline_mode
->specified
== false)
1002 /* attempt to find a matching mode in the list of modes
1003 * we have gotten so far, if not add a CVT mode that conforms
1005 if (cmdline_mode
->rb
|| cmdline_mode
->margins
)
1008 list_for_each_entry(mode
, &fb_helper_conn
->connector
->modes
, head
) {
1009 /* check width/height */
1010 if (mode
->hdisplay
!= cmdline_mode
->xres
||
1011 mode
->vdisplay
!= cmdline_mode
->yres
)
1014 if (cmdline_mode
->refresh_specified
) {
1015 if (mode
->vrefresh
!= cmdline_mode
->refresh
)
1019 if (cmdline_mode
->interlace
) {
1020 if (!(mode
->flags
& DRM_MODE_FLAG_INTERLACE
))
1027 mode
= drm_cvt_mode(fb_helper_conn
->connector
->dev
, cmdline_mode
->xres
,
1029 cmdline_mode
->refresh_specified
? cmdline_mode
->refresh
: 60,
1030 cmdline_mode
->rb
, cmdline_mode
->interlace
,
1031 cmdline_mode
->margins
);
1032 drm_mode_set_crtcinfo(mode
, CRTC_INTERLACE_HALVE_V
);
1033 list_add(&mode
->head
, &fb_helper_conn
->connector
->modes
);
1037 static bool drm_connector_enabled(struct drm_connector
*connector
, bool strict
)
1042 enable
= connector
->status
== connector_status_connected
;
1044 enable
= connector
->status
!= connector_status_disconnected
;
1049 static void drm_enable_connectors(struct drm_fb_helper
*fb_helper
,
1052 bool any_enabled
= false;
1053 struct drm_connector
*connector
;
1056 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
1057 connector
= fb_helper
->connector_info
[i
]->connector
;
1058 enabled
[i
] = drm_connector_enabled(connector
, true);
1059 DRM_DEBUG_KMS("connector %d enabled? %s\n", connector
->base
.id
,
1060 enabled
[i
] ? "yes" : "no");
1061 any_enabled
|= enabled
[i
];
1067 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
1068 connector
= fb_helper
->connector_info
[i
]->connector
;
1069 enabled
[i
] = drm_connector_enabled(connector
, false);
1073 static bool drm_target_cloned(struct drm_fb_helper
*fb_helper
,
1074 struct drm_display_mode
**modes
,
1075 bool *enabled
, int width
, int height
)
1078 bool can_clone
= false;
1079 struct drm_fb_helper_connector
*fb_helper_conn
;
1080 struct drm_display_mode
*dmt_mode
, *mode
;
1082 /* only contemplate cloning in the single crtc case */
1083 if (fb_helper
->crtc_count
> 1)
1087 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
1092 /* only contemplate cloning if more than one connector is enabled */
1096 /* check the command line or if nothing common pick 1024x768 */
1098 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
1101 fb_helper_conn
= fb_helper
->connector_info
[i
];
1102 modes
[i
] = drm_pick_cmdline_mode(fb_helper_conn
, width
, height
);
1107 for (j
= 0; j
< i
; j
++) {
1110 if (!drm_mode_equal(modes
[j
], modes
[i
]))
1116 DRM_DEBUG_KMS("can clone using command line\n");
1120 /* try and find a 1024x768 mode on each connector */
1122 dmt_mode
= drm_mode_find_dmt(fb_helper
->dev
, 1024, 768, 60);
1124 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
1129 fb_helper_conn
= fb_helper
->connector_info
[i
];
1130 list_for_each_entry(mode
, &fb_helper_conn
->connector
->modes
, head
) {
1131 if (drm_mode_equal(mode
, dmt_mode
))
1139 DRM_DEBUG_KMS("can clone using 1024x768\n");
1142 DRM_INFO("kms: can't enable cloning when we probably wanted to.\n");
1146 static bool drm_target_preferred(struct drm_fb_helper
*fb_helper
,
1147 struct drm_display_mode
**modes
,
1148 bool *enabled
, int width
, int height
)
1150 struct drm_fb_helper_connector
*fb_helper_conn
;
1153 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
1154 fb_helper_conn
= fb_helper
->connector_info
[i
];
1156 if (enabled
[i
] == false)
1159 DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n",
1160 fb_helper_conn
->connector
->base
.id
);
1162 /* got for command line mode first */
1163 modes
[i
] = drm_pick_cmdline_mode(fb_helper_conn
, width
, height
);
1165 DRM_DEBUG_KMS("looking for preferred mode on connector %d\n",
1166 fb_helper_conn
->connector
->base
.id
);
1167 modes
[i
] = drm_has_preferred_mode(fb_helper_conn
, width
, height
);
1169 /* No preferred modes, pick one off the list */
1170 if (!modes
[i
] && !list_empty(&fb_helper_conn
->connector
->modes
)) {
1171 list_for_each_entry(modes
[i
], &fb_helper_conn
->connector
->modes
, head
)
1174 DRM_DEBUG_KMS("found mode %s\n", modes
[i
] ? modes
[i
]->name
:
1180 static int drm_pick_crtcs(struct drm_fb_helper
*fb_helper
,
1181 struct drm_fb_helper_crtc
**best_crtcs
,
1182 struct drm_display_mode
**modes
,
1183 int n
, int width
, int height
)
1186 struct drm_device
*dev
= fb_helper
->dev
;
1187 struct drm_connector
*connector
;
1188 struct drm_connector_helper_funcs
*connector_funcs
;
1189 struct drm_encoder
*encoder
;
1190 struct drm_fb_helper_crtc
*best_crtc
;
1191 int my_score
, best_score
, score
;
1192 struct drm_fb_helper_crtc
**crtcs
, *crtc
;
1193 struct drm_fb_helper_connector
*fb_helper_conn
;
1195 if (n
== fb_helper
->connector_count
)
1198 fb_helper_conn
= fb_helper
->connector_info
[n
];
1199 connector
= fb_helper_conn
->connector
;
1201 best_crtcs
[n
] = NULL
;
1203 best_score
= drm_pick_crtcs(fb_helper
, best_crtcs
, modes
, n
+1, width
, height
);
1204 if (modes
[n
] == NULL
)
1207 crtcs
= kzalloc(dev
->mode_config
.num_connector
*
1208 sizeof(struct drm_fb_helper_crtc
*), GFP_KERNEL
);
1213 if (connector
->status
== connector_status_connected
)
1215 if (drm_has_cmdline_mode(fb_helper_conn
))
1217 if (drm_has_preferred_mode(fb_helper_conn
, width
, height
))
1220 connector_funcs
= connector
->helper_private
;
1221 encoder
= connector_funcs
->best_encoder(connector
);
1225 /* select a crtc for this connector and then attempt to configure
1226 remaining connectors */
1227 for (c
= 0; c
< fb_helper
->crtc_count
; c
++) {
1228 crtc
= &fb_helper
->crtc_info
[c
];
1230 if ((encoder
->possible_crtcs
& (1 << c
)) == 0) {
1234 for (o
= 0; o
< n
; o
++)
1235 if (best_crtcs
[o
] == crtc
)
1239 /* ignore cloning unless only a single crtc */
1240 if (fb_helper
->crtc_count
> 1)
1243 if (!drm_mode_equal(modes
[o
], modes
[n
]))
1248 memcpy(crtcs
, best_crtcs
, n
* sizeof(struct drm_fb_helper_crtc
*));
1249 score
= my_score
+ drm_pick_crtcs(fb_helper
, crtcs
, modes
, n
+ 1,
1251 if (score
> best_score
) {
1254 memcpy(best_crtcs
, crtcs
,
1255 dev
->mode_config
.num_connector
*
1256 sizeof(struct drm_fb_helper_crtc
*));
1264 static void drm_setup_crtcs(struct drm_fb_helper
*fb_helper
)
1266 struct drm_device
*dev
= fb_helper
->dev
;
1267 struct drm_fb_helper_crtc
**crtcs
;
1268 struct drm_display_mode
**modes
;
1269 struct drm_encoder
*encoder
;
1270 struct drm_mode_set
*modeset
;
1275 DRM_DEBUG_KMS("\n");
1277 width
= dev
->mode_config
.max_width
;
1278 height
= dev
->mode_config
.max_height
;
1280 /* clean out all the encoder/crtc combos */
1281 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
1282 encoder
->crtc
= NULL
;
1285 crtcs
= kcalloc(dev
->mode_config
.num_connector
,
1286 sizeof(struct drm_fb_helper_crtc
*), GFP_KERNEL
);
1287 modes
= kcalloc(dev
->mode_config
.num_connector
,
1288 sizeof(struct drm_display_mode
*), GFP_KERNEL
);
1289 enabled
= kcalloc(dev
->mode_config
.num_connector
,
1290 sizeof(bool), GFP_KERNEL
);
1292 drm_enable_connectors(fb_helper
, enabled
);
1294 ret
= drm_target_cloned(fb_helper
, modes
, enabled
, width
, height
);
1296 ret
= drm_target_preferred(fb_helper
, modes
, enabled
, width
, height
);
1298 DRM_ERROR("Unable to find initial modes\n");
1301 DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width
, height
);
1303 drm_pick_crtcs(fb_helper
, crtcs
, modes
, 0, width
, height
);
1305 /* need to set the modesets up here for use later */
1306 /* fill out the connector<->crtc mappings into the modesets */
1307 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
1308 modeset
= &fb_helper
->crtc_info
[i
].mode_set
;
1309 modeset
->num_connectors
= 0;
1312 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
1313 struct drm_display_mode
*mode
= modes
[i
];
1314 struct drm_fb_helper_crtc
*fb_crtc
= crtcs
[i
];
1315 modeset
= &fb_crtc
->mode_set
;
1317 if (mode
&& fb_crtc
) {
1318 DRM_DEBUG_KMS("desired mode %s set on crtc %d\n",
1319 mode
->name
, fb_crtc
->mode_set
.crtc
->base
.id
);
1320 fb_crtc
->desired_mode
= mode
;
1322 drm_mode_destroy(dev
, modeset
->mode
);
1323 modeset
->mode
= drm_mode_duplicate(dev
,
1324 fb_crtc
->desired_mode
);
1325 modeset
->connectors
[modeset
->num_connectors
++] = fb_helper
->connector_info
[i
]->connector
;
1335 * drm_helper_initial_config - setup a sane initial connector configuration
1339 * Called at init time, must take mode config lock.
1341 * Scan the CRTCs and connectors and try to put together an initial setup.
1342 * At the moment, this is a cloned configuration across all heads with
1343 * a new framebuffer object as the backing store.
1346 * Zero if everything went ok, nonzero otherwise.
1348 bool drm_fb_helper_initial_config(struct drm_fb_helper
*fb_helper
, int bpp_sel
)
1350 struct drm_device
*dev
= fb_helper
->dev
;
1353 /* disable all the possible outputs/crtcs before entering KMS mode */
1354 drm_helper_disable_unused_functions(fb_helper
->dev
);
1356 drm_fb_helper_parse_command_line(fb_helper
);
1358 count
= drm_fb_helper_probe_connector_modes(fb_helper
,
1359 dev
->mode_config
.max_width
,
1360 dev
->mode_config
.max_height
);
1362 * we shouldn't end up with no modes here.
1365 printk(KERN_INFO
"No connectors reported connected with modes\n");
1367 drm_setup_crtcs(fb_helper
);
1369 return drm_fb_helper_single_fb_probe(fb_helper
, bpp_sel
);
1371 EXPORT_SYMBOL(drm_fb_helper_initial_config
);
1373 bool drm_fb_helper_hotplug_event(struct drm_fb_helper
*fb_helper
)
1376 u32 max_width
, max_height
, bpp_sel
;
1377 bool bound
= false, crtcs_bound
= false;
1378 struct drm_crtc
*crtc
;
1383 list_for_each_entry(crtc
, &fb_helper
->dev
->mode_config
.crtc_list
, head
) {
1386 if (crtc
->fb
== fb_helper
->fb
)
1390 if (!bound
&& crtcs_bound
) {
1391 fb_helper
->delayed_hotplug
= true;
1394 DRM_DEBUG_KMS("\n");
1396 max_width
= fb_helper
->fb
->width
;
1397 max_height
= fb_helper
->fb
->height
;
1398 bpp_sel
= fb_helper
->fb
->bits_per_pixel
;
1400 count
= drm_fb_helper_probe_connector_modes(fb_helper
, max_width
,
1402 drm_setup_crtcs(fb_helper
);
1404 return drm_fb_helper_single_fb_probe(fb_helper
, bpp_sel
);
1406 EXPORT_SYMBOL(drm_fb_helper_hotplug_event
);