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>
35 #include "drm_fb_helper.h"
36 #include "drm_crtc_helper.h"
38 MODULE_AUTHOR("David Airlie, Jesse Barnes");
39 MODULE_DESCRIPTION("DRM KMS helper");
40 MODULE_LICENSE("GPL and additional rights");
42 static LIST_HEAD(kernel_fb_helper_list
);
44 /* simple single crtc case helper function */
45 int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper
*fb_helper
)
47 struct drm_device
*dev
= fb_helper
->dev
;
48 struct drm_connector
*connector
;
51 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
52 struct drm_fb_helper_connector
*fb_helper_connector
;
54 fb_helper_connector
= kzalloc(sizeof(struct drm_fb_helper_connector
), GFP_KERNEL
);
55 if (!fb_helper_connector
)
58 fb_helper_connector
->connector
= connector
;
59 fb_helper
->connector_info
[fb_helper
->connector_count
++] = fb_helper_connector
;
63 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
64 kfree(fb_helper
->connector_info
[i
]);
65 fb_helper
->connector_info
[i
] = NULL
;
67 fb_helper
->connector_count
= 0;
70 EXPORT_SYMBOL(drm_fb_helper_single_add_all_connectors
);
73 * drm_fb_helper_connector_parse_command_line - parse command line for connector
74 * @connector - connector to parse line for
75 * @mode_option - per connector mode option
77 * This parses the connector specific then generic command lines for
78 * modes and options to configure the connector.
80 * This uses the same parameters as the fb modedb.c, except for extra
81 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd]
83 * enable/enable Digital/disable bit at the end
85 static bool drm_fb_helper_connector_parse_command_line(struct drm_fb_helper_connector
*fb_helper_conn
,
86 const char *mode_option
)
90 int res_specified
= 0, bpp_specified
= 0, refresh_specified
= 0;
91 unsigned int xres
= 0, yres
= 0, bpp
= 32, refresh
= 0;
92 int yres_specified
= 0, cvt
= 0, rb
= 0, interlace
= 0, margins
= 0;
94 enum drm_connector_force force
= DRM_FORCE_UNSPECIFIED
;
95 struct drm_fb_helper_cmdline_mode
*cmdline_mode
;
96 struct drm_connector
*connector
= fb_helper_conn
->connector
;
101 cmdline_mode
= &fb_helper_conn
->cmdline_mode
;
103 mode_option
= fb_mode_option
;
106 cmdline_mode
->specified
= false;
111 namelen
= strlen(name
);
112 for (i
= namelen
-1; i
>= 0; i
--) {
116 if (!refresh_specified
&& !bpp_specified
&&
118 refresh
= simple_strtol(&name
[i
+1], NULL
, 10);
119 refresh_specified
= 1;
127 if (!bpp_specified
&& !yres_specified
) {
128 bpp
= simple_strtol(&name
[i
+1], NULL
, 10);
136 if (!yres_specified
) {
137 yres
= simple_strtol(&name
[i
+1], NULL
, 10);
160 force
= DRM_FORCE_ON
;
163 if ((connector
->connector_type
!= DRM_MODE_CONNECTOR_DVII
) &&
164 (connector
->connector_type
!= DRM_MODE_CONNECTOR_HDMIB
))
165 force
= DRM_FORCE_ON
;
167 force
= DRM_FORCE_ON_DIGITAL
;
170 force
= DRM_FORCE_OFF
;
176 if (i
< 0 && yres_specified
) {
177 xres
= simple_strtol(name
, NULL
, 10);
182 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n",
183 drm_get_connector_name(connector
), xres
, yres
,
184 (refresh
) ? refresh
: 60, (rb
) ? " reduced blanking" :
185 "", (margins
) ? " with margins" : "", (interlace
) ?
191 case DRM_FORCE_OFF
: s
= "OFF"; break;
192 case DRM_FORCE_ON_DIGITAL
: s
= "ON - dig"; break;
194 case DRM_FORCE_ON
: s
= "ON"; break;
197 DRM_INFO("forcing %s connector %s\n",
198 drm_get_connector_name(connector
), s
);
199 connector
->force
= force
;
203 cmdline_mode
->specified
= true;
204 cmdline_mode
->xres
= xres
;
205 cmdline_mode
->yres
= yres
;
208 if (refresh_specified
) {
209 cmdline_mode
->refresh_specified
= true;
210 cmdline_mode
->refresh
= refresh
;
214 cmdline_mode
->bpp_specified
= true;
215 cmdline_mode
->bpp
= bpp
;
217 cmdline_mode
->rb
= rb
? true : false;
218 cmdline_mode
->cvt
= cvt
? true : false;
219 cmdline_mode
->interlace
= interlace
? true : false;
224 static int drm_fb_helper_parse_command_line(struct drm_fb_helper
*fb_helper
)
226 struct drm_fb_helper_connector
*fb_helper_conn
;
229 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
232 fb_helper_conn
= fb_helper
->connector_info
[i
];
234 /* do something on return - turn off connector maybe */
235 if (fb_get_options(drm_get_connector_name(fb_helper_conn
->connector
), &option
))
238 drm_fb_helper_connector_parse_command_line(fb_helper_conn
, option
);
243 bool drm_fb_helper_force_kernel_mode(void)
246 bool ret
, error
= false;
247 struct drm_fb_helper
*helper
;
249 if (list_empty(&kernel_fb_helper_list
))
252 list_for_each_entry(helper
, &kernel_fb_helper_list
, kernel_fb_list
) {
253 for (i
= 0; i
< helper
->crtc_count
; i
++) {
254 struct drm_mode_set
*mode_set
= &helper
->crtc_info
[i
].mode_set
;
255 ret
= drm_crtc_helper_set_config(mode_set
);
263 int drm_fb_helper_panic(struct notifier_block
*n
, unsigned long ununsed
,
266 DRM_ERROR("panic occurred, switching back to text console\n");
267 return drm_fb_helper_force_kernel_mode();
270 EXPORT_SYMBOL(drm_fb_helper_panic
);
272 static struct notifier_block paniced
= {
273 .notifier_call
= drm_fb_helper_panic
,
277 * drm_fb_helper_restore - restore the framebuffer console (kernel) config
279 * Restore's the kernel's fbcon mode, used for lastclose & panic paths.
281 void drm_fb_helper_restore(void)
284 ret
= drm_fb_helper_force_kernel_mode();
286 DRM_ERROR("Failed to restore crtc configuration\n");
288 EXPORT_SYMBOL(drm_fb_helper_restore
);
290 #ifdef CONFIG_MAGIC_SYSRQ
291 static void drm_fb_helper_restore_work_fn(struct work_struct
*ignored
)
293 drm_fb_helper_restore();
295 static DECLARE_WORK(drm_fb_helper_restore_work
, drm_fb_helper_restore_work_fn
);
297 static void drm_fb_helper_sysrq(int dummy1
, struct tty_struct
*dummy3
)
299 schedule_work(&drm_fb_helper_restore_work
);
302 static struct sysrq_key_op sysrq_drm_fb_helper_restore_op
= {
303 .handler
= drm_fb_helper_sysrq
,
304 .help_msg
= "force-fb(V)",
305 .action_msg
= "Restore framebuffer console",
308 static struct sysrq_key_op sysrq_drm_fb_helper_restore_op
= { };
311 static void drm_fb_helper_on(struct fb_info
*info
)
313 struct drm_fb_helper
*fb_helper
= info
->par
;
314 struct drm_device
*dev
= fb_helper
->dev
;
315 struct drm_crtc
*crtc
;
316 struct drm_crtc_helper_funcs
*crtc_funcs
;
317 struct drm_encoder
*encoder
;
321 * For each CRTC in this fb, turn the crtc on then,
322 * find all associated encoders and turn them on.
324 mutex_lock(&dev
->mode_config
.mutex
);
325 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
326 crtc
= fb_helper
->crtc_info
[i
].mode_set
.crtc
;
327 crtc_funcs
= crtc
->helper_private
;
332 crtc_funcs
->dpms(crtc
, DRM_MODE_DPMS_ON
);
335 /* Found a CRTC on this fb, now find encoders */
336 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
337 if (encoder
->crtc
== crtc
) {
338 struct drm_encoder_helper_funcs
*encoder_funcs
;
340 encoder_funcs
= encoder
->helper_private
;
341 encoder_funcs
->dpms(encoder
, DRM_MODE_DPMS_ON
);
345 mutex_unlock(&dev
->mode_config
.mutex
);
348 static void drm_fb_helper_off(struct fb_info
*info
, int dpms_mode
)
350 struct drm_fb_helper
*fb_helper
= info
->par
;
351 struct drm_device
*dev
= fb_helper
->dev
;
352 struct drm_crtc
*crtc
;
353 struct drm_crtc_helper_funcs
*crtc_funcs
;
354 struct drm_encoder
*encoder
;
358 * For each CRTC in this fb, find all associated encoders
359 * and turn them off, then turn off the CRTC.
361 mutex_lock(&dev
->mode_config
.mutex
);
362 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
363 crtc
= fb_helper
->crtc_info
[i
].mode_set
.crtc
;
364 crtc_funcs
= crtc
->helper_private
;
369 /* Found a CRTC on this fb, now find encoders */
370 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
371 if (encoder
->crtc
== crtc
) {
372 struct drm_encoder_helper_funcs
*encoder_funcs
;
374 encoder_funcs
= encoder
->helper_private
;
375 encoder_funcs
->dpms(encoder
, dpms_mode
);
378 crtc_funcs
->dpms(crtc
, DRM_MODE_DPMS_OFF
);
380 mutex_unlock(&dev
->mode_config
.mutex
);
383 int drm_fb_helper_blank(int blank
, struct fb_info
*info
)
386 /* Display: On; HSync: On, VSync: On */
387 case FB_BLANK_UNBLANK
:
388 drm_fb_helper_on(info
);
390 /* Display: Off; HSync: On, VSync: On */
391 case FB_BLANK_NORMAL
:
392 drm_fb_helper_off(info
, DRM_MODE_DPMS_STANDBY
);
394 /* Display: Off; HSync: Off, VSync: On */
395 case FB_BLANK_HSYNC_SUSPEND
:
396 drm_fb_helper_off(info
, DRM_MODE_DPMS_STANDBY
);
398 /* Display: Off; HSync: On, VSync: Off */
399 case FB_BLANK_VSYNC_SUSPEND
:
400 drm_fb_helper_off(info
, DRM_MODE_DPMS_SUSPEND
);
402 /* Display: Off; HSync: Off, VSync: Off */
403 case FB_BLANK_POWERDOWN
:
404 drm_fb_helper_off(info
, DRM_MODE_DPMS_OFF
);
409 EXPORT_SYMBOL(drm_fb_helper_blank
);
411 static void drm_fb_helper_crtc_free(struct drm_fb_helper
*helper
)
415 for (i
= 0; i
< helper
->connector_count
; i
++)
416 kfree(helper
->connector_info
[i
]);
417 kfree(helper
->connector_info
);
418 for (i
= 0; i
< helper
->crtc_count
; i
++)
419 kfree(helper
->crtc_info
[i
].mode_set
.connectors
);
420 kfree(helper
->crtc_info
);
423 int drm_fb_helper_init_crtc_count(struct drm_device
*dev
,
424 struct drm_fb_helper
*helper
,
425 int crtc_count
, int max_conn_count
)
427 struct drm_crtc
*crtc
;
431 INIT_LIST_HEAD(&helper
->kernel_fb_list
);
433 helper
->crtc_info
= kcalloc(crtc_count
, sizeof(struct drm_fb_helper_crtc
), GFP_KERNEL
);
434 if (!helper
->crtc_info
)
436 helper
->crtc_count
= crtc_count
;
438 helper
->connector_info
= kcalloc(dev
->mode_config
.num_connector
, sizeof(struct drm_fb_helper_connector
*), GFP_KERNEL
);
439 if (!helper
->connector_info
) {
440 kfree(helper
->crtc_info
);
443 helper
->connector_count
= 0;
445 for (i
= 0; i
< crtc_count
; i
++) {
446 helper
->crtc_info
[i
].mode_set
.connectors
=
447 kcalloc(max_conn_count
,
448 sizeof(struct drm_connector
*),
451 if (!helper
->crtc_info
[i
].mode_set
.connectors
) {
455 helper
->crtc_info
[i
].mode_set
.num_connectors
= 0;
459 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
460 helper
->crtc_info
[i
].crtc_id
= crtc
->base
.id
;
461 helper
->crtc_info
[i
].mode_set
.crtc
= crtc
;
464 helper
->conn_limit
= max_conn_count
;
467 drm_fb_helper_crtc_free(helper
);
470 EXPORT_SYMBOL(drm_fb_helper_init_crtc_count
);
472 static int setcolreg(struct drm_crtc
*crtc
, u16 red
, u16 green
,
473 u16 blue
, u16 regno
, struct fb_info
*info
)
475 struct drm_fb_helper
*fb_helper
= info
->par
;
476 struct drm_framebuffer
*fb
= fb_helper
->fb
;
479 if (info
->fix
.visual
== FB_VISUAL_TRUECOLOR
) {
482 /* place color in psuedopalette */
485 palette
= (u32
*)info
->pseudo_palette
;
486 red
>>= (16 - info
->var
.red
.length
);
487 green
>>= (16 - info
->var
.green
.length
);
488 blue
>>= (16 - info
->var
.blue
.length
);
489 value
= (red
<< info
->var
.red
.offset
) |
490 (green
<< info
->var
.green
.offset
) |
491 (blue
<< info
->var
.blue
.offset
);
492 palette
[regno
] = value
;
498 if (fb
->bits_per_pixel
== 16) {
501 if (fb
->depth
== 16 && regno
> 63)
503 if (fb
->depth
== 15 && regno
> 31)
506 if (fb
->depth
== 16) {
510 for (i
= 0; i
< 8; i
++)
511 fb_helper
->funcs
->gamma_set(crtc
, red
,
512 green
, blue
, pindex
+ i
);
515 fb_helper
->funcs
->gamma_get(crtc
, &r
,
519 for (i
= 0; i
< 4; i
++)
520 fb_helper
->funcs
->gamma_set(crtc
, r
,
527 fb_helper
->funcs
->gamma_set(crtc
, red
, green
, blue
, pindex
);
531 int drm_fb_helper_setcmap(struct fb_cmap
*cmap
, struct fb_info
*info
)
533 struct drm_fb_helper
*fb_helper
= info
->par
;
534 struct drm_crtc_helper_funcs
*crtc_funcs
;
535 u16
*red
, *green
, *blue
, *transp
;
536 struct drm_crtc
*crtc
;
540 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
541 crtc
= fb_helper
->crtc_info
[i
].mode_set
.crtc
;
542 crtc_funcs
= crtc
->helper_private
;
547 transp
= cmap
->transp
;
550 for (i
= 0; i
< cmap
->len
; i
++) {
551 u16 hred
, hgreen
, hblue
, htransp
= 0xffff;
560 rc
= setcolreg(crtc
, hred
, hgreen
, hblue
, start
++, info
);
564 crtc_funcs
->load_lut(crtc
);
568 EXPORT_SYMBOL(drm_fb_helper_setcmap
);
570 int drm_fb_helper_setcolreg(unsigned regno
,
575 struct fb_info
*info
)
577 struct drm_fb_helper
*fb_helper
= info
->par
;
578 struct drm_crtc
*crtc
;
579 struct drm_crtc_helper_funcs
*crtc_funcs
;
586 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
587 crtc
= fb_helper
->crtc_info
[i
].mode_set
.crtc
;
588 crtc_funcs
= crtc
->helper_private
;
590 ret
= setcolreg(crtc
, red
, green
, blue
, regno
, info
);
594 crtc_funcs
->load_lut(crtc
);
598 EXPORT_SYMBOL(drm_fb_helper_setcolreg
);
600 int drm_fb_helper_check_var(struct fb_var_screeninfo
*var
,
601 struct fb_info
*info
)
603 struct drm_fb_helper
*fb_helper
= info
->par
;
604 struct drm_framebuffer
*fb
= fb_helper
->fb
;
607 if (var
->pixclock
!= 0)
610 /* Need to resize the fb object !!! */
611 if (var
->bits_per_pixel
> fb
->bits_per_pixel
|| var
->xres
> fb
->width
|| var
->yres
> fb
->height
) {
612 DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb "
613 "object %dx%d-%d > %dx%d-%d\n", var
->xres
, var
->yres
, var
->bits_per_pixel
,
614 fb
->width
, fb
->height
, fb
->bits_per_pixel
);
618 switch (var
->bits_per_pixel
) {
620 depth
= (var
->green
.length
== 6) ? 16 : 15;
623 depth
= (var
->transp
.length
> 0) ? 32 : 24;
626 depth
= var
->bits_per_pixel
;
633 var
->green
.offset
= 0;
634 var
->blue
.offset
= 0;
636 var
->green
.length
= 8;
637 var
->blue
.length
= 8;
638 var
->transp
.length
= 0;
639 var
->transp
.offset
= 0;
642 var
->red
.offset
= 10;
643 var
->green
.offset
= 5;
644 var
->blue
.offset
= 0;
646 var
->green
.length
= 5;
647 var
->blue
.length
= 5;
648 var
->transp
.length
= 1;
649 var
->transp
.offset
= 15;
652 var
->red
.offset
= 11;
653 var
->green
.offset
= 5;
654 var
->blue
.offset
= 0;
656 var
->green
.length
= 6;
657 var
->blue
.length
= 5;
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
= 0;
669 var
->transp
.offset
= 0;
672 var
->red
.offset
= 16;
673 var
->green
.offset
= 8;
674 var
->blue
.offset
= 0;
676 var
->green
.length
= 8;
677 var
->blue
.length
= 8;
678 var
->transp
.length
= 8;
679 var
->transp
.offset
= 24;
686 EXPORT_SYMBOL(drm_fb_helper_check_var
);
688 /* this will let fbcon do the mode init */
689 int drm_fb_helper_set_par(struct fb_info
*info
)
691 struct drm_fb_helper
*fb_helper
= info
->par
;
692 struct drm_device
*dev
= fb_helper
->dev
;
693 struct fb_var_screeninfo
*var
= &info
->var
;
694 struct drm_crtc
*crtc
;
698 if (var
->pixclock
!= 0) {
699 DRM_ERROR("PIXEL CLOCK SET\n");
703 mutex_lock(&dev
->mode_config
.mutex
);
704 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
705 crtc
= fb_helper
->crtc_info
[i
].mode_set
.crtc
;
706 ret
= crtc
->funcs
->set_config(&fb_helper
->crtc_info
[i
].mode_set
);
708 mutex_unlock(&dev
->mode_config
.mutex
);
712 mutex_unlock(&dev
->mode_config
.mutex
);
715 EXPORT_SYMBOL(drm_fb_helper_set_par
);
717 int drm_fb_helper_pan_display(struct fb_var_screeninfo
*var
,
718 struct fb_info
*info
)
720 struct drm_fb_helper
*fb_helper
= info
->par
;
721 struct drm_device
*dev
= fb_helper
->dev
;
722 struct drm_mode_set
*modeset
;
723 struct drm_crtc
*crtc
;
727 mutex_lock(&dev
->mode_config
.mutex
);
728 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
729 crtc
= fb_helper
->crtc_info
[i
].mode_set
.crtc
;
731 modeset
= &fb_helper
->crtc_info
[i
].mode_set
;
733 modeset
->x
= var
->xoffset
;
734 modeset
->y
= var
->yoffset
;
736 if (modeset
->num_connectors
) {
737 ret
= crtc
->funcs
->set_config(modeset
);
739 info
->var
.xoffset
= var
->xoffset
;
740 info
->var
.yoffset
= var
->yoffset
;
744 mutex_unlock(&dev
->mode_config
.mutex
);
747 EXPORT_SYMBOL(drm_fb_helper_pan_display
);
749 int drm_fb_helper_single_fb_probe(struct drm_fb_helper
*fb_helper
,
755 struct fb_info
*info
;
756 struct drm_fb_helper_surface_size sizes
;
759 memset(&sizes
, 0, sizeof(struct drm_fb_helper_surface_size
));
760 sizes
.surface_depth
= 24;
761 sizes
.surface_bpp
= 32;
762 sizes
.fb_width
= (unsigned)-1;
763 sizes
.fb_height
= (unsigned)-1;
765 /* if driver picks 8 or 16 by default use that
766 for both depth/bpp */
767 if (preferred_bpp
!= sizes
.surface_bpp
) {
768 sizes
.surface_depth
= sizes
.surface_bpp
= preferred_bpp
;
770 /* first up get a count of crtcs now in use and new min/maxes width/heights */
771 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
772 struct drm_fb_helper_connector
*fb_helper_conn
= fb_helper
->connector_info
[i
];
773 struct drm_fb_helper_cmdline_mode
*cmdline_mode
;
775 cmdline_mode
= &fb_helper_conn
->cmdline_mode
;
777 if (cmdline_mode
->bpp_specified
) {
778 switch (cmdline_mode
->bpp
) {
780 sizes
.surface_depth
= sizes
.surface_bpp
= 8;
783 sizes
.surface_depth
= 15;
784 sizes
.surface_bpp
= 16;
787 sizes
.surface_depth
= sizes
.surface_bpp
= 16;
790 sizes
.surface_depth
= sizes
.surface_bpp
= 24;
793 sizes
.surface_depth
= 24;
794 sizes
.surface_bpp
= 32;
802 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
803 struct drm_display_mode
*desired_mode
;
804 desired_mode
= fb_helper
->crtc_info
[i
].desired_mode
;
808 gamma_size
= fb_helper
->crtc_info
[i
].mode_set
.crtc
->gamma_size
;
809 if (desired_mode
->hdisplay
< sizes
.fb_width
)
810 sizes
.fb_width
= desired_mode
->hdisplay
;
811 if (desired_mode
->vdisplay
< sizes
.fb_height
)
812 sizes
.fb_height
= desired_mode
->vdisplay
;
813 if (desired_mode
->hdisplay
> sizes
.surface_width
)
814 sizes
.surface_width
= desired_mode
->hdisplay
;
815 if (desired_mode
->vdisplay
> sizes
.surface_height
)
816 sizes
.surface_height
= desired_mode
->vdisplay
;
821 if (crtc_count
== 0 || sizes
.fb_width
== -1 || sizes
.fb_height
== -1) {
822 /* hmm everyone went away - assume VGA cable just fell out
823 and will come back later. */
824 DRM_ERROR("Cannot find any crtc or sizes - going 1024x768\n");
825 sizes
.fb_width
= sizes
.surface_width
= 1024;
826 sizes
.fb_height
= sizes
.surface_height
= 768;
829 /* push down into drivers */
830 new_fb
= (*fb_helper
->fb_probe
)(fb_helper
, &sizes
);
834 info
= fb_helper
->fbdev
;
836 /* set the fb pointer */
837 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
838 fb_helper
->crtc_info
[i
].mode_set
.fb
= fb_helper
->fb
;
842 info
->var
.pixclock
= 0;
843 ret
= fb_alloc_cmap(&info
->cmap
, gamma_size
, 0);
846 if (register_framebuffer(info
) < 0) {
847 fb_dealloc_cmap(&info
->cmap
);
851 printk(KERN_INFO
"fb%d: %s frame buffer device\n", info
->node
,
855 drm_fb_helper_set_par(info
);
858 /* Switch back to kernel console on panic */
859 /* multi card linked list maybe */
860 if (list_empty(&kernel_fb_helper_list
)) {
861 printk(KERN_INFO
"registered panic notifier\n");
862 atomic_notifier_chain_register(&panic_notifier_list
,
864 register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op
);
867 list_add(&fb_helper
->kernel_fb_list
, &kernel_fb_helper_list
);
871 EXPORT_SYMBOL(drm_fb_helper_single_fb_probe
);
873 void drm_fb_helper_free(struct drm_fb_helper
*helper
)
875 if (!list_empty(&helper
->kernel_fb_list
)) {
876 list_del(&helper
->kernel_fb_list
);
877 if (list_empty(&kernel_fb_helper_list
)) {
878 printk(KERN_INFO
"unregistered panic notifier\n");
879 atomic_notifier_chain_unregister(&panic_notifier_list
,
881 unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op
);
884 drm_fb_helper_crtc_free(helper
);
885 if (helper
->fbdev
->cmap
.len
)
886 fb_dealloc_cmap(&helper
->fbdev
->cmap
);
888 EXPORT_SYMBOL(drm_fb_helper_free
);
890 void drm_fb_helper_fill_fix(struct fb_info
*info
, uint32_t pitch
,
893 info
->fix
.type
= FB_TYPE_PACKED_PIXELS
;
894 info
->fix
.visual
= depth
== 8 ? FB_VISUAL_PSEUDOCOLOR
:
896 info
->fix
.type_aux
= 0;
897 info
->fix
.xpanstep
= 1; /* doing it in hw */
898 info
->fix
.ypanstep
= 1; /* doing it in hw */
899 info
->fix
.ywrapstep
= 0;
900 info
->fix
.accel
= FB_ACCEL_NONE
;
901 info
->fix
.type_aux
= 0;
903 info
->fix
.line_length
= pitch
;
906 EXPORT_SYMBOL(drm_fb_helper_fill_fix
);
908 void drm_fb_helper_fill_var(struct fb_info
*info
, struct drm_fb_helper
*fb_helper
,
909 uint32_t fb_width
, uint32_t fb_height
)
911 struct drm_framebuffer
*fb
= fb_helper
->fb
;
912 info
->pseudo_palette
= fb_helper
->pseudo_palette
;
913 info
->var
.xres_virtual
= fb
->width
;
914 info
->var
.yres_virtual
= fb
->height
;
915 info
->var
.bits_per_pixel
= fb
->bits_per_pixel
;
916 info
->var
.xoffset
= 0;
917 info
->var
.yoffset
= 0;
918 info
->var
.activate
= FB_ACTIVATE_NOW
;
919 info
->var
.height
= -1;
920 info
->var
.width
= -1;
924 info
->var
.red
.offset
= 0;
925 info
->var
.green
.offset
= 0;
926 info
->var
.blue
.offset
= 0;
927 info
->var
.red
.length
= 8; /* 8bit DAC */
928 info
->var
.green
.length
= 8;
929 info
->var
.blue
.length
= 8;
930 info
->var
.transp
.offset
= 0;
931 info
->var
.transp
.length
= 0;
934 info
->var
.red
.offset
= 10;
935 info
->var
.green
.offset
= 5;
936 info
->var
.blue
.offset
= 0;
937 info
->var
.red
.length
= 5;
938 info
->var
.green
.length
= 5;
939 info
->var
.blue
.length
= 5;
940 info
->var
.transp
.offset
= 15;
941 info
->var
.transp
.length
= 1;
944 info
->var
.red
.offset
= 11;
945 info
->var
.green
.offset
= 5;
946 info
->var
.blue
.offset
= 0;
947 info
->var
.red
.length
= 5;
948 info
->var
.green
.length
= 6;
949 info
->var
.blue
.length
= 5;
950 info
->var
.transp
.offset
= 0;
953 info
->var
.red
.offset
= 16;
954 info
->var
.green
.offset
= 8;
955 info
->var
.blue
.offset
= 0;
956 info
->var
.red
.length
= 8;
957 info
->var
.green
.length
= 8;
958 info
->var
.blue
.length
= 8;
959 info
->var
.transp
.offset
= 0;
960 info
->var
.transp
.length
= 0;
963 info
->var
.red
.offset
= 16;
964 info
->var
.green
.offset
= 8;
965 info
->var
.blue
.offset
= 0;
966 info
->var
.red
.length
= 8;
967 info
->var
.green
.length
= 8;
968 info
->var
.blue
.length
= 8;
969 info
->var
.transp
.offset
= 24;
970 info
->var
.transp
.length
= 8;
976 info
->var
.xres
= fb_width
;
977 info
->var
.yres
= fb_height
;
979 EXPORT_SYMBOL(drm_fb_helper_fill_var
);
981 static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper
*fb_helper
,
985 struct drm_connector
*connector
;
989 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
990 connector
= fb_helper
->connector_info
[i
]->connector
;
991 count
+= connector
->funcs
->fill_modes(connector
, maxX
, maxY
);
997 static struct drm_display_mode
*drm_has_preferred_mode(struct drm_fb_helper_connector
*fb_connector
, int width
, int height
)
999 struct drm_display_mode
*mode
;
1001 list_for_each_entry(mode
, &fb_connector
->connector
->modes
, head
) {
1002 if (drm_mode_width(mode
) > width
||
1003 drm_mode_height(mode
) > height
)
1005 if (mode
->type
& DRM_MODE_TYPE_PREFERRED
)
1011 static bool drm_has_cmdline_mode(struct drm_fb_helper_connector
*fb_connector
)
1013 struct drm_fb_helper_cmdline_mode
*cmdline_mode
;
1014 cmdline_mode
= &fb_connector
->cmdline_mode
;
1015 return cmdline_mode
->specified
;
1018 static struct drm_display_mode
*drm_pick_cmdline_mode(struct drm_fb_helper_connector
*fb_helper_conn
,
1019 int width
, int height
)
1021 struct drm_fb_helper_cmdline_mode
*cmdline_mode
;
1022 struct drm_display_mode
*mode
= NULL
;
1024 cmdline_mode
= &fb_helper_conn
->cmdline_mode
;
1025 if (cmdline_mode
->specified
== false)
1028 /* attempt to find a matching mode in the list of modes
1029 * we have gotten so far, if not add a CVT mode that conforms
1031 if (cmdline_mode
->rb
|| cmdline_mode
->margins
)
1034 list_for_each_entry(mode
, &fb_helper_conn
->connector
->modes
, head
) {
1035 /* check width/height */
1036 if (mode
->hdisplay
!= cmdline_mode
->xres
||
1037 mode
->vdisplay
!= cmdline_mode
->yres
)
1040 if (cmdline_mode
->refresh_specified
) {
1041 if (mode
->vrefresh
!= cmdline_mode
->refresh
)
1045 if (cmdline_mode
->interlace
) {
1046 if (!(mode
->flags
& DRM_MODE_FLAG_INTERLACE
))
1053 mode
= drm_cvt_mode(fb_helper_conn
->connector
->dev
, cmdline_mode
->xres
,
1055 cmdline_mode
->refresh_specified
? cmdline_mode
->refresh
: 60,
1056 cmdline_mode
->rb
, cmdline_mode
->interlace
,
1057 cmdline_mode
->margins
);
1058 drm_mode_set_crtcinfo(mode
, CRTC_INTERLACE_HALVE_V
);
1059 list_add(&mode
->head
, &fb_helper_conn
->connector
->modes
);
1063 static bool drm_connector_enabled(struct drm_connector
*connector
, bool strict
)
1068 enable
= connector
->status
== connector_status_connected
;
1070 enable
= connector
->status
!= connector_status_disconnected
;
1075 static void drm_enable_connectors(struct drm_fb_helper
*fb_helper
,
1078 bool any_enabled
= false;
1079 struct drm_connector
*connector
;
1082 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
1083 connector
= fb_helper
->connector_info
[i
]->connector
;
1084 enabled
[i
] = drm_connector_enabled(connector
, true);
1085 DRM_DEBUG_KMS("connector %d enabled? %s\n", connector
->base
.id
,
1086 enabled
[i
] ? "yes" : "no");
1087 any_enabled
|= enabled
[i
];
1093 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
1094 connector
= fb_helper
->connector_info
[i
]->connector
;
1095 enabled
[i
] = drm_connector_enabled(connector
, false);
1099 static bool drm_target_preferred(struct drm_fb_helper
*fb_helper
,
1100 struct drm_display_mode
**modes
,
1101 bool *enabled
, int width
, int height
)
1103 struct drm_fb_helper_connector
*fb_helper_conn
;
1106 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
1107 fb_helper_conn
= fb_helper
->connector_info
[i
];
1109 if (enabled
[i
] == false)
1112 DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n",
1113 fb_helper_conn
->connector
->base
.id
);
1115 /* got for command line mode first */
1116 modes
[i
] = drm_pick_cmdline_mode(fb_helper_conn
, width
, height
);
1118 DRM_DEBUG_KMS("looking for preferred mode on connector %d\n",
1119 fb_helper_conn
->connector
->base
.id
);
1120 modes
[i
] = drm_has_preferred_mode(fb_helper_conn
, width
, height
);
1122 /* No preferred modes, pick one off the list */
1123 if (!modes
[i
] && !list_empty(&fb_helper_conn
->connector
->modes
)) {
1124 list_for_each_entry(modes
[i
], &fb_helper_conn
->connector
->modes
, head
)
1127 DRM_DEBUG_KMS("found mode %s\n", modes
[i
] ? modes
[i
]->name
:
1133 static int drm_pick_crtcs(struct drm_fb_helper
*fb_helper
,
1134 struct drm_fb_helper_crtc
**best_crtcs
,
1135 struct drm_display_mode
**modes
,
1136 int n
, int width
, int height
)
1139 struct drm_device
*dev
= fb_helper
->dev
;
1140 struct drm_connector
*connector
;
1141 struct drm_connector_helper_funcs
*connector_funcs
;
1142 struct drm_encoder
*encoder
;
1143 struct drm_fb_helper_crtc
*best_crtc
;
1144 int my_score
, best_score
, score
;
1145 struct drm_fb_helper_crtc
**crtcs
, *crtc
;
1146 struct drm_fb_helper_connector
*fb_helper_conn
;
1148 if (n
== fb_helper
->connector_count
)
1151 fb_helper_conn
= fb_helper
->connector_info
[n
];
1152 connector
= fb_helper_conn
->connector
;
1154 best_crtcs
[n
] = NULL
;
1156 best_score
= drm_pick_crtcs(fb_helper
, best_crtcs
, modes
, n
+1, width
, height
);
1157 if (modes
[n
] == NULL
)
1160 crtcs
= kzalloc(dev
->mode_config
.num_connector
*
1161 sizeof(struct drm_fb_helper_crtc
*), GFP_KERNEL
);
1166 if (connector
->status
== connector_status_connected
)
1168 if (drm_has_cmdline_mode(fb_helper_conn
))
1170 if (drm_has_preferred_mode(fb_helper_conn
, width
, height
))
1173 connector_funcs
= connector
->helper_private
;
1174 encoder
= connector_funcs
->best_encoder(connector
);
1178 /* select a crtc for this connector and then attempt to configure
1179 remaining connectors */
1180 for (c
= 0; c
< fb_helper
->crtc_count
; c
++) {
1181 crtc
= &fb_helper
->crtc_info
[c
];
1183 if ((encoder
->possible_crtcs
& (1 << c
)) == 0) {
1187 for (o
= 0; o
< n
; o
++)
1188 if (best_crtcs
[o
] == crtc
)
1192 /* ignore cloning for now */
1197 memcpy(crtcs
, best_crtcs
, n
* sizeof(struct drm_fb_helper_crtc
*));
1198 score
= my_score
+ drm_pick_crtcs(fb_helper
, crtcs
, modes
, n
+ 1,
1200 if (score
> best_score
) {
1203 memcpy(best_crtcs
, crtcs
,
1204 dev
->mode_config
.num_connector
*
1205 sizeof(struct drm_fb_helper_crtc
*));
1213 static void drm_setup_crtcs(struct drm_fb_helper
*fb_helper
)
1215 struct drm_device
*dev
= fb_helper
->dev
;
1216 struct drm_fb_helper_crtc
**crtcs
;
1217 struct drm_display_mode
**modes
;
1218 struct drm_encoder
*encoder
;
1219 struct drm_mode_set
*modeset
;
1224 DRM_DEBUG_KMS("\n");
1226 width
= dev
->mode_config
.max_width
;
1227 height
= dev
->mode_config
.max_height
;
1229 /* clean out all the encoder/crtc combos */
1230 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
1231 encoder
->crtc
= NULL
;
1234 crtcs
= kcalloc(dev
->mode_config
.num_connector
,
1235 sizeof(struct drm_fb_helper_crtc
*), GFP_KERNEL
);
1236 modes
= kcalloc(dev
->mode_config
.num_connector
,
1237 sizeof(struct drm_display_mode
*), GFP_KERNEL
);
1238 enabled
= kcalloc(dev
->mode_config
.num_connector
,
1239 sizeof(bool), GFP_KERNEL
);
1241 drm_enable_connectors(fb_helper
, enabled
);
1243 ret
= drm_target_preferred(fb_helper
, modes
, enabled
, width
, height
);
1245 DRM_ERROR("Unable to find initial modes\n");
1247 DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width
, height
);
1249 drm_pick_crtcs(fb_helper
, crtcs
, modes
, 0, width
, height
);
1251 /* need to set the modesets up here for use later */
1252 /* fill out the connector<->crtc mappings into the modesets */
1253 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
1254 modeset
= &fb_helper
->crtc_info
[i
].mode_set
;
1255 modeset
->num_connectors
= 0;
1258 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
1259 struct drm_display_mode
*mode
= modes
[i
];
1260 struct drm_fb_helper_crtc
*fb_crtc
= crtcs
[i
];
1261 modeset
= &fb_crtc
->mode_set
;
1263 if (mode
&& fb_crtc
) {
1264 DRM_DEBUG_KMS("desired mode %s set on crtc %d\n",
1265 mode
->name
, fb_crtc
->mode_set
.crtc
->base
.id
);
1266 fb_crtc
->desired_mode
= mode
;
1268 drm_mode_destroy(dev
, modeset
->mode
);
1269 modeset
->mode
= drm_mode_duplicate(dev
,
1270 fb_crtc
->desired_mode
);
1271 modeset
->connectors
[modeset
->num_connectors
++] = fb_helper
->connector_info
[i
]->connector
;
1281 * drm_helper_initial_config - setup a sane initial connector configuration
1285 * Called at init time, must take mode config lock.
1287 * Scan the CRTCs and connectors and try to put together an initial setup.
1288 * At the moment, this is a cloned configuration across all heads with
1289 * a new framebuffer object as the backing store.
1292 * Zero if everything went ok, nonzero otherwise.
1294 bool drm_fb_helper_initial_config(struct drm_fb_helper
*fb_helper
)
1296 struct drm_device
*dev
= fb_helper
->dev
;
1299 /* disable all the possible outputs/crtcs before entering KMS mode */
1300 drm_helper_disable_unused_functions(fb_helper
->dev
);
1302 drm_fb_helper_parse_command_line(fb_helper
);
1304 count
= drm_fb_helper_probe_connector_modes(fb_helper
,
1305 dev
->mode_config
.max_width
,
1306 dev
->mode_config
.max_height
);
1309 * we shouldn't end up with no modes here.
1312 printk(KERN_INFO
"No connectors reported connected with modes\n");
1314 drm_setup_crtcs(fb_helper
);
1318 EXPORT_SYMBOL(drm_fb_helper_initial_config
);
1320 bool drm_helper_fb_hotplug_event(struct drm_fb_helper
*fb_helper
,
1321 u32 max_width
, u32 max_height
)
1323 DRM_DEBUG_KMS("\n");
1325 drm_fb_helper_probe_connector_modes(fb_helper
, max_width
,
1328 drm_setup_crtcs(fb_helper
);
1332 EXPORT_SYMBOL(drm_helper_fb_hotplug_event
);