2 * Copyright (c) 2006-2009 Red Hat Inc.
3 * Copyright (c) 2006-2008 Intel Corporation
4 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
6 * DRM framebuffer helper functions
8 * Permission to use, copy, modify, distribute, and sell this software and its
9 * documentation for any purpose is hereby granted without fee, provided that
10 * the above copyright notice appear in all copies and that both that copyright
11 * notice and this permission notice appear in supporting documentation, and
12 * that the name of the copyright holders not be used in advertising or
13 * publicity pertaining to distribution of the software without specific,
14 * written prior permission. The copyright holders make no representations
15 * about the suitability of this software for any purpose. It is provided "as
16 * is" without express or implied warranty.
18 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
19 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
20 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
21 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
22 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
23 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
27 * Dave Airlie <airlied@linux.ie>
28 * Jesse Barnes <jesse.barnes@intel.com>
30 #include <linux/kernel.h>
31 #include <linux/sysrq.h>
32 #include <linux/slab.h>
34 #include <linux/module.h>
37 #include "drm_fb_helper.h"
38 #include "drm_crtc_helper.h"
40 MODULE_AUTHOR("David Airlie, Jesse Barnes");
41 MODULE_DESCRIPTION("DRM KMS helper");
42 MODULE_LICENSE("GPL and additional rights");
44 static LIST_HEAD(kernel_fb_helper_list
);
46 /* simple single crtc case helper function */
47 int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper
*fb_helper
)
49 struct drm_device
*dev
= fb_helper
->dev
;
50 struct drm_connector
*connector
;
53 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
54 struct drm_fb_helper_connector
*fb_helper_connector
;
56 fb_helper_connector
= kzalloc(sizeof(struct drm_fb_helper_connector
), GFP_KERNEL
);
57 if (!fb_helper_connector
)
60 fb_helper_connector
->connector
= connector
;
61 fb_helper
->connector_info
[fb_helper
->connector_count
++] = fb_helper_connector
;
65 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
66 kfree(fb_helper
->connector_info
[i
]);
67 fb_helper
->connector_info
[i
] = NULL
;
69 fb_helper
->connector_count
= 0;
72 EXPORT_SYMBOL(drm_fb_helper_single_add_all_connectors
);
74 static int drm_fb_helper_parse_command_line(struct drm_fb_helper
*fb_helper
)
76 struct drm_fb_helper_connector
*fb_helper_conn
;
79 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
80 struct drm_cmdline_mode
*mode
;
81 struct drm_connector
*connector
;
84 fb_helper_conn
= fb_helper
->connector_info
[i
];
85 connector
= fb_helper_conn
->connector
;
86 mode
= &fb_helper_conn
->cmdline_mode
;
88 /* do something on return - turn off connector maybe */
89 if (fb_get_options(drm_get_connector_name(connector
), &option
))
92 if (drm_mode_parse_command_line_for_connector(option
,
97 switch (mode
->force
) {
98 case DRM_FORCE_OFF
: s
= "OFF"; break;
99 case DRM_FORCE_ON_DIGITAL
: s
= "ON - dig"; break;
101 case DRM_FORCE_ON
: s
= "ON"; break;
104 DRM_INFO("forcing %s connector %s\n",
105 drm_get_connector_name(connector
), s
);
106 connector
->force
= mode
->force
;
109 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n",
110 drm_get_connector_name(connector
),
111 mode
->xres
, mode
->yres
,
112 mode
->refresh_specified
? mode
->refresh
: 60,
113 mode
->rb
? " reduced blanking" : "",
114 mode
->margins
? " with margins" : "",
115 mode
->interlace
? " interlaced" : "");
122 static void drm_fb_helper_save_lut_atomic(struct drm_crtc
*crtc
, struct drm_fb_helper
*helper
)
124 uint16_t *r_base
, *g_base
, *b_base
;
127 r_base
= crtc
->gamma_store
;
128 g_base
= r_base
+ crtc
->gamma_size
;
129 b_base
= g_base
+ crtc
->gamma_size
;
131 for (i
= 0; i
< crtc
->gamma_size
; i
++)
132 helper
->funcs
->gamma_get(crtc
, &r_base
[i
], &g_base
[i
], &b_base
[i
], i
);
135 static void drm_fb_helper_restore_lut_atomic(struct drm_crtc
*crtc
)
137 uint16_t *r_base
, *g_base
, *b_base
;
139 r_base
= crtc
->gamma_store
;
140 g_base
= r_base
+ crtc
->gamma_size
;
141 b_base
= g_base
+ crtc
->gamma_size
;
143 crtc
->funcs
->gamma_set(crtc
, r_base
, g_base
, b_base
, 0, crtc
->gamma_size
);
146 int drm_fb_helper_debug_enter(struct fb_info
*info
)
148 struct drm_fb_helper
*helper
= info
->par
;
149 struct drm_crtc_helper_funcs
*funcs
;
152 if (list_empty(&kernel_fb_helper_list
))
155 list_for_each_entry(helper
, &kernel_fb_helper_list
, kernel_fb_list
) {
156 for (i
= 0; i
< helper
->crtc_count
; i
++) {
157 struct drm_mode_set
*mode_set
=
158 &helper
->crtc_info
[i
].mode_set
;
160 if (!mode_set
->crtc
->enabled
)
163 funcs
= mode_set
->crtc
->helper_private
;
164 drm_fb_helper_save_lut_atomic(mode_set
->crtc
, helper
);
165 funcs
->mode_set_base_atomic(mode_set
->crtc
,
169 ENTER_ATOMIC_MODE_SET
);
175 EXPORT_SYMBOL(drm_fb_helper_debug_enter
);
177 /* Find the real fb for a given fb helper CRTC */
178 static struct drm_framebuffer
*drm_mode_config_fb(struct drm_crtc
*crtc
)
180 struct drm_device
*dev
= crtc
->dev
;
183 list_for_each_entry(c
, &dev
->mode_config
.crtc_list
, head
) {
184 if (crtc
->base
.id
== c
->base
.id
)
191 int drm_fb_helper_debug_leave(struct fb_info
*info
)
193 struct drm_fb_helper
*helper
= info
->par
;
194 struct drm_crtc
*crtc
;
195 struct drm_crtc_helper_funcs
*funcs
;
196 struct drm_framebuffer
*fb
;
199 for (i
= 0; i
< helper
->crtc_count
; i
++) {
200 struct drm_mode_set
*mode_set
= &helper
->crtc_info
[i
].mode_set
;
201 crtc
= mode_set
->crtc
;
202 funcs
= crtc
->helper_private
;
203 fb
= drm_mode_config_fb(crtc
);
209 DRM_ERROR("no fb to restore??\n");
213 drm_fb_helper_restore_lut_atomic(mode_set
->crtc
);
214 funcs
->mode_set_base_atomic(mode_set
->crtc
, fb
, crtc
->x
,
215 crtc
->y
, LEAVE_ATOMIC_MODE_SET
);
220 EXPORT_SYMBOL(drm_fb_helper_debug_leave
);
222 bool drm_fb_helper_restore_fbdev_mode(struct drm_fb_helper
*fb_helper
)
226 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
227 struct drm_mode_set
*mode_set
= &fb_helper
->crtc_info
[i
].mode_set
;
228 ret
= drm_crtc_helper_set_config(mode_set
);
234 EXPORT_SYMBOL(drm_fb_helper_restore_fbdev_mode
);
236 bool drm_fb_helper_force_kernel_mode(void)
238 bool ret
, error
= false;
239 struct drm_fb_helper
*helper
;
241 if (list_empty(&kernel_fb_helper_list
))
244 list_for_each_entry(helper
, &kernel_fb_helper_list
, kernel_fb_list
) {
245 if (helper
->dev
->switch_power_state
== DRM_SWITCH_POWER_OFF
)
248 ret
= drm_fb_helper_restore_fbdev_mode(helper
);
255 int drm_fb_helper_panic(struct notifier_block
*n
, unsigned long ununsed
,
259 * It's a waste of time and effort to switch back to text console
260 * if the kernel should reboot before panic messages can be seen.
262 if (panic_timeout
< 0)
265 printk(KERN_ERR
"panic occurred, switching back to text console\n");
266 return drm_fb_helper_force_kernel_mode();
268 EXPORT_SYMBOL(drm_fb_helper_panic
);
270 static struct notifier_block paniced
= {
271 .notifier_call
= drm_fb_helper_panic
,
275 * drm_fb_helper_restore - restore the framebuffer console (kernel) config
277 * Restore's the kernel's fbcon mode, used for lastclose & panic paths.
279 void drm_fb_helper_restore(void)
282 ret
= drm_fb_helper_force_kernel_mode();
284 DRM_ERROR("Failed to restore crtc configuration\n");
286 EXPORT_SYMBOL(drm_fb_helper_restore
);
288 #ifdef CONFIG_MAGIC_SYSRQ
289 static void drm_fb_helper_restore_work_fn(struct work_struct
*ignored
)
291 drm_fb_helper_restore();
293 static DECLARE_WORK(drm_fb_helper_restore_work
, drm_fb_helper_restore_work_fn
);
295 static void drm_fb_helper_sysrq(int dummy1
)
297 schedule_work(&drm_fb_helper_restore_work
);
300 static struct sysrq_key_op sysrq_drm_fb_helper_restore_op
= {
301 .handler
= drm_fb_helper_sysrq
,
302 .help_msg
= "force-fb(V)",
303 .action_msg
= "Restore framebuffer console",
306 static struct sysrq_key_op sysrq_drm_fb_helper_restore_op
= { };
309 static void drm_fb_helper_on(struct fb_info
*info
)
311 struct drm_fb_helper
*fb_helper
= info
->par
;
312 struct drm_device
*dev
= fb_helper
->dev
;
313 struct drm_crtc
*crtc
;
314 struct drm_crtc_helper_funcs
*crtc_funcs
;
315 struct drm_connector
*connector
;
316 struct drm_encoder
*encoder
;
320 * For each CRTC in this fb, turn the crtc on then,
321 * find all associated encoders and turn them on.
323 mutex_lock(&dev
->mode_config
.mutex
);
324 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
325 crtc
= fb_helper
->crtc_info
[i
].mode_set
.crtc
;
326 crtc_funcs
= crtc
->helper_private
;
331 crtc_funcs
->dpms(crtc
, DRM_MODE_DPMS_ON
);
333 /* Walk the connectors & encoders on this fb turning them on */
334 for (j
= 0; j
< fb_helper
->connector_count
; j
++) {
335 connector
= fb_helper
->connector_info
[j
]->connector
;
336 connector
->dpms
= DRM_MODE_DPMS_ON
;
337 drm_connector_property_set_value(connector
,
338 dev
->mode_config
.dpms_property
,
341 /* Found a CRTC on this fb, now find encoders */
342 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
343 if (encoder
->crtc
== crtc
) {
344 struct drm_encoder_helper_funcs
*encoder_funcs
;
346 encoder_funcs
= encoder
->helper_private
;
347 encoder_funcs
->dpms(encoder
, DRM_MODE_DPMS_ON
);
351 mutex_unlock(&dev
->mode_config
.mutex
);
354 static void drm_fb_helper_off(struct fb_info
*info
, int dpms_mode
)
356 struct drm_fb_helper
*fb_helper
= info
->par
;
357 struct drm_device
*dev
= fb_helper
->dev
;
358 struct drm_crtc
*crtc
;
359 struct drm_crtc_helper_funcs
*crtc_funcs
;
360 struct drm_connector
*connector
;
361 struct drm_encoder
*encoder
;
365 * For each CRTC in this fb, find all associated encoders
366 * and turn them off, then turn off the CRTC.
368 mutex_lock(&dev
->mode_config
.mutex
);
369 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
370 crtc
= fb_helper
->crtc_info
[i
].mode_set
.crtc
;
371 crtc_funcs
= crtc
->helper_private
;
376 /* Walk the connectors on this fb and mark them off */
377 for (j
= 0; j
< fb_helper
->connector_count
; j
++) {
378 connector
= fb_helper
->connector_info
[j
]->connector
;
379 connector
->dpms
= dpms_mode
;
380 drm_connector_property_set_value(connector
,
381 dev
->mode_config
.dpms_property
,
384 /* Found a CRTC on this fb, now find encoders */
385 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
386 if (encoder
->crtc
== crtc
) {
387 struct drm_encoder_helper_funcs
*encoder_funcs
;
389 encoder_funcs
= encoder
->helper_private
;
390 encoder_funcs
->dpms(encoder
, dpms_mode
);
393 crtc_funcs
->dpms(crtc
, DRM_MODE_DPMS_OFF
);
395 mutex_unlock(&dev
->mode_config
.mutex
);
398 int drm_fb_helper_blank(int blank
, struct fb_info
*info
)
401 /* Display: On; HSync: On, VSync: On */
402 case FB_BLANK_UNBLANK
:
403 drm_fb_helper_on(info
);
405 /* Display: Off; HSync: On, VSync: On */
406 case FB_BLANK_NORMAL
:
407 drm_fb_helper_off(info
, DRM_MODE_DPMS_STANDBY
);
409 /* Display: Off; HSync: Off, VSync: On */
410 case FB_BLANK_HSYNC_SUSPEND
:
411 drm_fb_helper_off(info
, DRM_MODE_DPMS_STANDBY
);
413 /* Display: Off; HSync: On, VSync: Off */
414 case FB_BLANK_VSYNC_SUSPEND
:
415 drm_fb_helper_off(info
, DRM_MODE_DPMS_SUSPEND
);
417 /* Display: Off; HSync: Off, VSync: Off */
418 case FB_BLANK_POWERDOWN
:
419 drm_fb_helper_off(info
, DRM_MODE_DPMS_OFF
);
424 EXPORT_SYMBOL(drm_fb_helper_blank
);
426 static void drm_fb_helper_crtc_free(struct drm_fb_helper
*helper
)
430 for (i
= 0; i
< helper
->connector_count
; i
++)
431 kfree(helper
->connector_info
[i
]);
432 kfree(helper
->connector_info
);
433 for (i
= 0; i
< helper
->crtc_count
; i
++)
434 kfree(helper
->crtc_info
[i
].mode_set
.connectors
);
435 kfree(helper
->crtc_info
);
438 int drm_fb_helper_init(struct drm_device
*dev
,
439 struct drm_fb_helper
*fb_helper
,
440 int crtc_count
, int max_conn_count
)
442 struct drm_crtc
*crtc
;
446 fb_helper
->dev
= dev
;
448 INIT_LIST_HEAD(&fb_helper
->kernel_fb_list
);
450 fb_helper
->crtc_info
= kcalloc(crtc_count
, sizeof(struct drm_fb_helper_crtc
), GFP_KERNEL
);
451 if (!fb_helper
->crtc_info
)
454 fb_helper
->crtc_count
= crtc_count
;
455 fb_helper
->connector_info
= kcalloc(dev
->mode_config
.num_connector
, sizeof(struct drm_fb_helper_connector
*), GFP_KERNEL
);
456 if (!fb_helper
->connector_info
) {
457 kfree(fb_helper
->crtc_info
);
460 fb_helper
->connector_count
= 0;
462 for (i
= 0; i
< crtc_count
; i
++) {
463 fb_helper
->crtc_info
[i
].mode_set
.connectors
=
464 kcalloc(max_conn_count
,
465 sizeof(struct drm_connector
*),
468 if (!fb_helper
->crtc_info
[i
].mode_set
.connectors
) {
472 fb_helper
->crtc_info
[i
].mode_set
.num_connectors
= 0;
476 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
477 fb_helper
->crtc_info
[i
].crtc_id
= crtc
->base
.id
;
478 fb_helper
->crtc_info
[i
].mode_set
.crtc
= crtc
;
481 fb_helper
->conn_limit
= max_conn_count
;
484 drm_fb_helper_crtc_free(fb_helper
);
487 EXPORT_SYMBOL(drm_fb_helper_init
);
489 void drm_fb_helper_fini(struct drm_fb_helper
*fb_helper
)
491 if (!list_empty(&fb_helper
->kernel_fb_list
)) {
492 list_del(&fb_helper
->kernel_fb_list
);
493 if (list_empty(&kernel_fb_helper_list
)) {
494 printk(KERN_INFO
"drm: unregistered panic notifier\n");
495 atomic_notifier_chain_unregister(&panic_notifier_list
,
497 unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op
);
501 drm_fb_helper_crtc_free(fb_helper
);
504 EXPORT_SYMBOL(drm_fb_helper_fini
);
506 static int setcolreg(struct drm_crtc
*crtc
, u16 red
, u16 green
,
507 u16 blue
, u16 regno
, struct fb_info
*info
)
509 struct drm_fb_helper
*fb_helper
= info
->par
;
510 struct drm_framebuffer
*fb
= fb_helper
->fb
;
513 if (info
->fix
.visual
== FB_VISUAL_TRUECOLOR
) {
516 /* place color in psuedopalette */
519 palette
= (u32
*)info
->pseudo_palette
;
520 red
>>= (16 - info
->var
.red
.length
);
521 green
>>= (16 - info
->var
.green
.length
);
522 blue
>>= (16 - info
->var
.blue
.length
);
523 value
= (red
<< info
->var
.red
.offset
) |
524 (green
<< info
->var
.green
.offset
) |
525 (blue
<< info
->var
.blue
.offset
);
526 if (info
->var
.transp
.length
> 0) {
527 u32 mask
= (1 << info
->var
.transp
.length
) - 1;
528 mask
<<= info
->var
.transp
.offset
;
531 palette
[regno
] = value
;
537 if (fb
->bits_per_pixel
== 16) {
540 if (fb
->depth
== 16 && regno
> 63)
542 if (fb
->depth
== 15 && regno
> 31)
545 if (fb
->depth
== 16) {
549 for (i
= 0; i
< 8; i
++)
550 fb_helper
->funcs
->gamma_set(crtc
, red
,
551 green
, blue
, pindex
+ i
);
554 fb_helper
->funcs
->gamma_get(crtc
, &r
,
558 for (i
= 0; i
< 4; i
++)
559 fb_helper
->funcs
->gamma_set(crtc
, r
,
566 fb_helper
->funcs
->gamma_set(crtc
, red
, green
, blue
, pindex
);
570 int drm_fb_helper_setcmap(struct fb_cmap
*cmap
, struct fb_info
*info
)
572 struct drm_fb_helper
*fb_helper
= info
->par
;
573 struct drm_crtc_helper_funcs
*crtc_funcs
;
574 u16
*red
, *green
, *blue
, *transp
;
575 struct drm_crtc
*crtc
;
579 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
580 crtc
= fb_helper
->crtc_info
[i
].mode_set
.crtc
;
581 crtc_funcs
= crtc
->helper_private
;
586 transp
= cmap
->transp
;
589 for (j
= 0; j
< cmap
->len
; j
++) {
590 u16 hred
, hgreen
, hblue
, htransp
= 0xffff;
599 rc
= setcolreg(crtc
, hred
, hgreen
, hblue
, start
++, info
);
603 crtc_funcs
->load_lut(crtc
);
607 EXPORT_SYMBOL(drm_fb_helper_setcmap
);
609 int drm_fb_helper_check_var(struct fb_var_screeninfo
*var
,
610 struct fb_info
*info
)
612 struct drm_fb_helper
*fb_helper
= info
->par
;
613 struct drm_framebuffer
*fb
= fb_helper
->fb
;
616 if (var
->pixclock
!= 0 || in_dbg_master())
619 /* Need to resize the fb object !!! */
620 if (var
->bits_per_pixel
> fb
->bits_per_pixel
|| var
->xres
> fb
->width
|| var
->yres
> fb
->height
) {
621 DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb "
622 "object %dx%d-%d > %dx%d-%d\n", var
->xres
, var
->yres
, var
->bits_per_pixel
,
623 fb
->width
, fb
->height
, fb
->bits_per_pixel
);
627 switch (var
->bits_per_pixel
) {
629 depth
= (var
->green
.length
== 6) ? 16 : 15;
632 depth
= (var
->transp
.length
> 0) ? 32 : 24;
635 depth
= var
->bits_per_pixel
;
642 var
->green
.offset
= 0;
643 var
->blue
.offset
= 0;
645 var
->green
.length
= 8;
646 var
->blue
.length
= 8;
647 var
->transp
.length
= 0;
648 var
->transp
.offset
= 0;
651 var
->red
.offset
= 10;
652 var
->green
.offset
= 5;
653 var
->blue
.offset
= 0;
655 var
->green
.length
= 5;
656 var
->blue
.length
= 5;
657 var
->transp
.length
= 1;
658 var
->transp
.offset
= 15;
661 var
->red
.offset
= 11;
662 var
->green
.offset
= 5;
663 var
->blue
.offset
= 0;
665 var
->green
.length
= 6;
666 var
->blue
.length
= 5;
667 var
->transp
.length
= 0;
668 var
->transp
.offset
= 0;
671 var
->red
.offset
= 16;
672 var
->green
.offset
= 8;
673 var
->blue
.offset
= 0;
675 var
->green
.length
= 8;
676 var
->blue
.length
= 8;
677 var
->transp
.length
= 0;
678 var
->transp
.offset
= 0;
681 var
->red
.offset
= 16;
682 var
->green
.offset
= 8;
683 var
->blue
.offset
= 0;
685 var
->green
.length
= 8;
686 var
->blue
.length
= 8;
687 var
->transp
.length
= 8;
688 var
->transp
.offset
= 24;
695 EXPORT_SYMBOL(drm_fb_helper_check_var
);
697 /* this will let fbcon do the mode init */
698 int drm_fb_helper_set_par(struct fb_info
*info
)
700 struct drm_fb_helper
*fb_helper
= info
->par
;
701 struct drm_device
*dev
= fb_helper
->dev
;
702 struct fb_var_screeninfo
*var
= &info
->var
;
703 struct drm_crtc
*crtc
;
707 if (var
->pixclock
!= 0) {
708 DRM_ERROR("PIXEL CLOCK SET\n");
712 mutex_lock(&dev
->mode_config
.mutex
);
713 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
714 crtc
= fb_helper
->crtc_info
[i
].mode_set
.crtc
;
715 ret
= crtc
->funcs
->set_config(&fb_helper
->crtc_info
[i
].mode_set
);
717 mutex_unlock(&dev
->mode_config
.mutex
);
721 mutex_unlock(&dev
->mode_config
.mutex
);
723 if (fb_helper
->delayed_hotplug
) {
724 fb_helper
->delayed_hotplug
= false;
725 drm_fb_helper_hotplug_event(fb_helper
);
729 EXPORT_SYMBOL(drm_fb_helper_set_par
);
731 int drm_fb_helper_pan_display(struct fb_var_screeninfo
*var
,
732 struct fb_info
*info
)
734 struct drm_fb_helper
*fb_helper
= info
->par
;
735 struct drm_device
*dev
= fb_helper
->dev
;
736 struct drm_mode_set
*modeset
;
737 struct drm_crtc
*crtc
;
741 mutex_lock(&dev
->mode_config
.mutex
);
742 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
743 crtc
= fb_helper
->crtc_info
[i
].mode_set
.crtc
;
745 modeset
= &fb_helper
->crtc_info
[i
].mode_set
;
747 modeset
->x
= var
->xoffset
;
748 modeset
->y
= var
->yoffset
;
750 if (modeset
->num_connectors
) {
751 ret
= crtc
->funcs
->set_config(modeset
);
753 info
->var
.xoffset
= var
->xoffset
;
754 info
->var
.yoffset
= var
->yoffset
;
758 mutex_unlock(&dev
->mode_config
.mutex
);
761 EXPORT_SYMBOL(drm_fb_helper_pan_display
);
763 int drm_fb_helper_single_fb_probe(struct drm_fb_helper
*fb_helper
,
769 struct fb_info
*info
;
770 struct drm_fb_helper_surface_size sizes
;
773 memset(&sizes
, 0, sizeof(struct drm_fb_helper_surface_size
));
774 sizes
.surface_depth
= 24;
775 sizes
.surface_bpp
= 32;
776 sizes
.fb_width
= (unsigned)-1;
777 sizes
.fb_height
= (unsigned)-1;
779 /* if driver picks 8 or 16 by default use that
780 for both depth/bpp */
781 if (preferred_bpp
!= sizes
.surface_bpp
) {
782 sizes
.surface_depth
= sizes
.surface_bpp
= preferred_bpp
;
784 /* first up get a count of crtcs now in use and new min/maxes width/heights */
785 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
786 struct drm_fb_helper_connector
*fb_helper_conn
= fb_helper
->connector_info
[i
];
787 struct drm_cmdline_mode
*cmdline_mode
;
789 cmdline_mode
= &fb_helper_conn
->cmdline_mode
;
791 if (cmdline_mode
->bpp_specified
) {
792 switch (cmdline_mode
->bpp
) {
794 sizes
.surface_depth
= sizes
.surface_bpp
= 8;
797 sizes
.surface_depth
= 15;
798 sizes
.surface_bpp
= 16;
801 sizes
.surface_depth
= sizes
.surface_bpp
= 16;
804 sizes
.surface_depth
= sizes
.surface_bpp
= 24;
807 sizes
.surface_depth
= 24;
808 sizes
.surface_bpp
= 32;
816 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
817 struct drm_display_mode
*desired_mode
;
818 desired_mode
= fb_helper
->crtc_info
[i
].desired_mode
;
822 gamma_size
= fb_helper
->crtc_info
[i
].mode_set
.crtc
->gamma_size
;
823 if (desired_mode
->hdisplay
< sizes
.fb_width
)
824 sizes
.fb_width
= desired_mode
->hdisplay
;
825 if (desired_mode
->vdisplay
< sizes
.fb_height
)
826 sizes
.fb_height
= desired_mode
->vdisplay
;
827 if (desired_mode
->hdisplay
> sizes
.surface_width
)
828 sizes
.surface_width
= desired_mode
->hdisplay
;
829 if (desired_mode
->vdisplay
> sizes
.surface_height
)
830 sizes
.surface_height
= desired_mode
->vdisplay
;
835 if (crtc_count
== 0 || sizes
.fb_width
== -1 || sizes
.fb_height
== -1) {
836 /* hmm everyone went away - assume VGA cable just fell out
837 and will come back later. */
838 DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n");
839 sizes
.fb_width
= sizes
.surface_width
= 1024;
840 sizes
.fb_height
= sizes
.surface_height
= 768;
843 /* push down into drivers */
844 new_fb
= (*fb_helper
->funcs
->fb_probe
)(fb_helper
, &sizes
);
848 info
= fb_helper
->fbdev
;
850 /* set the fb pointer */
851 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
852 fb_helper
->crtc_info
[i
].mode_set
.fb
= fb_helper
->fb
;
856 info
->var
.pixclock
= 0;
857 if (register_framebuffer(info
) < 0) {
861 printk(KERN_INFO
"fb%d: %s frame buffer device\n", info
->node
,
865 drm_fb_helper_set_par(info
);
868 /* Switch back to kernel console on panic */
869 /* multi card linked list maybe */
870 if (list_empty(&kernel_fb_helper_list
)) {
871 printk(KERN_INFO
"drm: registered panic notifier\n");
872 atomic_notifier_chain_register(&panic_notifier_list
,
874 register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op
);
877 list_add(&fb_helper
->kernel_fb_list
, &kernel_fb_helper_list
);
881 EXPORT_SYMBOL(drm_fb_helper_single_fb_probe
);
883 void drm_fb_helper_fill_fix(struct fb_info
*info
, uint32_t pitch
,
886 info
->fix
.type
= FB_TYPE_PACKED_PIXELS
;
887 info
->fix
.visual
= depth
== 8 ? FB_VISUAL_PSEUDOCOLOR
:
889 info
->fix
.mmio_start
= 0;
890 info
->fix
.mmio_len
= 0;
891 info
->fix
.type_aux
= 0;
892 info
->fix
.xpanstep
= 1; /* doing it in hw */
893 info
->fix
.ypanstep
= 1; /* doing it in hw */
894 info
->fix
.ywrapstep
= 0;
895 info
->fix
.accel
= FB_ACCEL_NONE
;
896 info
->fix
.type_aux
= 0;
898 info
->fix
.line_length
= pitch
;
901 EXPORT_SYMBOL(drm_fb_helper_fill_fix
);
903 void drm_fb_helper_fill_var(struct fb_info
*info
, struct drm_fb_helper
*fb_helper
,
904 uint32_t fb_width
, uint32_t fb_height
)
906 struct drm_framebuffer
*fb
= fb_helper
->fb
;
907 info
->pseudo_palette
= fb_helper
->pseudo_palette
;
908 info
->var
.xres_virtual
= fb
->width
;
909 info
->var
.yres_virtual
= fb
->height
;
910 info
->var
.bits_per_pixel
= fb
->bits_per_pixel
;
911 info
->var
.accel_flags
= FB_ACCELF_TEXT
;
912 info
->var
.xoffset
= 0;
913 info
->var
.yoffset
= 0;
914 info
->var
.activate
= FB_ACTIVATE_NOW
;
915 info
->var
.height
= -1;
916 info
->var
.width
= -1;
920 info
->var
.red
.offset
= 0;
921 info
->var
.green
.offset
= 0;
922 info
->var
.blue
.offset
= 0;
923 info
->var
.red
.length
= 8; /* 8bit DAC */
924 info
->var
.green
.length
= 8;
925 info
->var
.blue
.length
= 8;
926 info
->var
.transp
.offset
= 0;
927 info
->var
.transp
.length
= 0;
930 info
->var
.red
.offset
= 10;
931 info
->var
.green
.offset
= 5;
932 info
->var
.blue
.offset
= 0;
933 info
->var
.red
.length
= 5;
934 info
->var
.green
.length
= 5;
935 info
->var
.blue
.length
= 5;
936 info
->var
.transp
.offset
= 15;
937 info
->var
.transp
.length
= 1;
940 info
->var
.red
.offset
= 11;
941 info
->var
.green
.offset
= 5;
942 info
->var
.blue
.offset
= 0;
943 info
->var
.red
.length
= 5;
944 info
->var
.green
.length
= 6;
945 info
->var
.blue
.length
= 5;
946 info
->var
.transp
.offset
= 0;
949 info
->var
.red
.offset
= 16;
950 info
->var
.green
.offset
= 8;
951 info
->var
.blue
.offset
= 0;
952 info
->var
.red
.length
= 8;
953 info
->var
.green
.length
= 8;
954 info
->var
.blue
.length
= 8;
955 info
->var
.transp
.offset
= 0;
956 info
->var
.transp
.length
= 0;
959 info
->var
.red
.offset
= 16;
960 info
->var
.green
.offset
= 8;
961 info
->var
.blue
.offset
= 0;
962 info
->var
.red
.length
= 8;
963 info
->var
.green
.length
= 8;
964 info
->var
.blue
.length
= 8;
965 info
->var
.transp
.offset
= 24;
966 info
->var
.transp
.length
= 8;
972 info
->var
.xres
= fb_width
;
973 info
->var
.yres
= fb_height
;
975 EXPORT_SYMBOL(drm_fb_helper_fill_var
);
977 static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper
*fb_helper
,
981 struct drm_connector
*connector
;
985 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
986 connector
= fb_helper
->connector_info
[i
]->connector
;
987 count
+= connector
->funcs
->fill_modes(connector
, maxX
, maxY
);
993 static struct drm_display_mode
*drm_has_preferred_mode(struct drm_fb_helper_connector
*fb_connector
, int width
, int height
)
995 struct drm_display_mode
*mode
;
997 list_for_each_entry(mode
, &fb_connector
->connector
->modes
, head
) {
998 if (drm_mode_width(mode
) > width
||
999 drm_mode_height(mode
) > height
)
1001 if (mode
->type
& DRM_MODE_TYPE_PREFERRED
)
1007 static bool drm_has_cmdline_mode(struct drm_fb_helper_connector
*fb_connector
)
1009 struct drm_cmdline_mode
*cmdline_mode
;
1010 cmdline_mode
= &fb_connector
->cmdline_mode
;
1011 return cmdline_mode
->specified
;
1014 static struct drm_display_mode
*drm_pick_cmdline_mode(struct drm_fb_helper_connector
*fb_helper_conn
,
1015 int width
, int height
)
1017 struct drm_cmdline_mode
*cmdline_mode
;
1018 struct drm_display_mode
*mode
= NULL
;
1020 cmdline_mode
= &fb_helper_conn
->cmdline_mode
;
1021 if (cmdline_mode
->specified
== false)
1024 /* attempt to find a matching mode in the list of modes
1025 * we have gotten so far, if not add a CVT mode that conforms
1027 if (cmdline_mode
->rb
|| cmdline_mode
->margins
)
1030 list_for_each_entry(mode
, &fb_helper_conn
->connector
->modes
, head
) {
1031 /* check width/height */
1032 if (mode
->hdisplay
!= cmdline_mode
->xres
||
1033 mode
->vdisplay
!= cmdline_mode
->yres
)
1036 if (cmdline_mode
->refresh_specified
) {
1037 if (mode
->vrefresh
!= cmdline_mode
->refresh
)
1041 if (cmdline_mode
->interlace
) {
1042 if (!(mode
->flags
& DRM_MODE_FLAG_INTERLACE
))
1049 mode
= drm_mode_create_from_cmdline_mode(fb_helper_conn
->connector
->dev
,
1051 list_add(&mode
->head
, &fb_helper_conn
->connector
->modes
);
1055 static bool drm_connector_enabled(struct drm_connector
*connector
, bool strict
)
1060 enable
= connector
->status
== connector_status_connected
;
1062 enable
= connector
->status
!= connector_status_disconnected
;
1067 static void drm_enable_connectors(struct drm_fb_helper
*fb_helper
,
1070 bool any_enabled
= false;
1071 struct drm_connector
*connector
;
1074 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
1075 connector
= fb_helper
->connector_info
[i
]->connector
;
1076 enabled
[i
] = drm_connector_enabled(connector
, true);
1077 DRM_DEBUG_KMS("connector %d enabled? %s\n", connector
->base
.id
,
1078 enabled
[i
] ? "yes" : "no");
1079 any_enabled
|= enabled
[i
];
1085 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
1086 connector
= fb_helper
->connector_info
[i
]->connector
;
1087 enabled
[i
] = drm_connector_enabled(connector
, false);
1091 static bool drm_target_cloned(struct drm_fb_helper
*fb_helper
,
1092 struct drm_display_mode
**modes
,
1093 bool *enabled
, int width
, int height
)
1096 bool can_clone
= false;
1097 struct drm_fb_helper_connector
*fb_helper_conn
;
1098 struct drm_display_mode
*dmt_mode
, *mode
;
1100 /* only contemplate cloning in the single crtc case */
1101 if (fb_helper
->crtc_count
> 1)
1105 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
1110 /* only contemplate cloning if more than one connector is enabled */
1114 /* check the command line or if nothing common pick 1024x768 */
1116 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
1119 fb_helper_conn
= fb_helper
->connector_info
[i
];
1120 modes
[i
] = drm_pick_cmdline_mode(fb_helper_conn
, width
, height
);
1125 for (j
= 0; j
< i
; j
++) {
1128 if (!drm_mode_equal(modes
[j
], modes
[i
]))
1134 DRM_DEBUG_KMS("can clone using command line\n");
1138 /* try and find a 1024x768 mode on each connector */
1140 dmt_mode
= drm_mode_find_dmt(fb_helper
->dev
, 1024, 768, 60);
1142 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
1147 fb_helper_conn
= fb_helper
->connector_info
[i
];
1148 list_for_each_entry(mode
, &fb_helper_conn
->connector
->modes
, head
) {
1149 if (drm_mode_equal(mode
, dmt_mode
))
1157 DRM_DEBUG_KMS("can clone using 1024x768\n");
1160 DRM_INFO("kms: can't enable cloning when we probably wanted to.\n");
1164 static bool drm_target_preferred(struct drm_fb_helper
*fb_helper
,
1165 struct drm_display_mode
**modes
,
1166 bool *enabled
, int width
, int height
)
1168 struct drm_fb_helper_connector
*fb_helper_conn
;
1171 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
1172 fb_helper_conn
= fb_helper
->connector_info
[i
];
1174 if (enabled
[i
] == false)
1177 DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n",
1178 fb_helper_conn
->connector
->base
.id
);
1180 /* got for command line mode first */
1181 modes
[i
] = drm_pick_cmdline_mode(fb_helper_conn
, width
, height
);
1183 DRM_DEBUG_KMS("looking for preferred mode on connector %d\n",
1184 fb_helper_conn
->connector
->base
.id
);
1185 modes
[i
] = drm_has_preferred_mode(fb_helper_conn
, width
, height
);
1187 /* No preferred modes, pick one off the list */
1188 if (!modes
[i
] && !list_empty(&fb_helper_conn
->connector
->modes
)) {
1189 list_for_each_entry(modes
[i
], &fb_helper_conn
->connector
->modes
, head
)
1192 DRM_DEBUG_KMS("found mode %s\n", modes
[i
] ? modes
[i
]->name
:
1198 static int drm_pick_crtcs(struct drm_fb_helper
*fb_helper
,
1199 struct drm_fb_helper_crtc
**best_crtcs
,
1200 struct drm_display_mode
**modes
,
1201 int n
, int width
, int height
)
1204 struct drm_device
*dev
= fb_helper
->dev
;
1205 struct drm_connector
*connector
;
1206 struct drm_connector_helper_funcs
*connector_funcs
;
1207 struct drm_encoder
*encoder
;
1208 struct drm_fb_helper_crtc
*best_crtc
;
1209 int my_score
, best_score
, score
;
1210 struct drm_fb_helper_crtc
**crtcs
, *crtc
;
1211 struct drm_fb_helper_connector
*fb_helper_conn
;
1213 if (n
== fb_helper
->connector_count
)
1216 fb_helper_conn
= fb_helper
->connector_info
[n
];
1217 connector
= fb_helper_conn
->connector
;
1219 best_crtcs
[n
] = NULL
;
1221 best_score
= drm_pick_crtcs(fb_helper
, best_crtcs
, modes
, n
+1, width
, height
);
1222 if (modes
[n
] == NULL
)
1225 crtcs
= kzalloc(dev
->mode_config
.num_connector
*
1226 sizeof(struct drm_fb_helper_crtc
*), GFP_KERNEL
);
1231 if (connector
->status
== connector_status_connected
)
1233 if (drm_has_cmdline_mode(fb_helper_conn
))
1235 if (drm_has_preferred_mode(fb_helper_conn
, width
, height
))
1238 connector_funcs
= connector
->helper_private
;
1239 encoder
= connector_funcs
->best_encoder(connector
);
1243 /* select a crtc for this connector and then attempt to configure
1244 remaining connectors */
1245 for (c
= 0; c
< fb_helper
->crtc_count
; c
++) {
1246 crtc
= &fb_helper
->crtc_info
[c
];
1248 if ((encoder
->possible_crtcs
& (1 << c
)) == 0) {
1252 for (o
= 0; o
< n
; o
++)
1253 if (best_crtcs
[o
] == crtc
)
1257 /* ignore cloning unless only a single crtc */
1258 if (fb_helper
->crtc_count
> 1)
1261 if (!drm_mode_equal(modes
[o
], modes
[n
]))
1266 memcpy(crtcs
, best_crtcs
, n
* sizeof(struct drm_fb_helper_crtc
*));
1267 score
= my_score
+ drm_pick_crtcs(fb_helper
, crtcs
, modes
, n
+ 1,
1269 if (score
> best_score
) {
1272 memcpy(best_crtcs
, crtcs
,
1273 dev
->mode_config
.num_connector
*
1274 sizeof(struct drm_fb_helper_crtc
*));
1282 static void drm_setup_crtcs(struct drm_fb_helper
*fb_helper
)
1284 struct drm_device
*dev
= fb_helper
->dev
;
1285 struct drm_fb_helper_crtc
**crtcs
;
1286 struct drm_display_mode
**modes
;
1287 struct drm_encoder
*encoder
;
1288 struct drm_mode_set
*modeset
;
1293 DRM_DEBUG_KMS("\n");
1295 width
= dev
->mode_config
.max_width
;
1296 height
= dev
->mode_config
.max_height
;
1298 /* clean out all the encoder/crtc combos */
1299 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
1300 encoder
->crtc
= NULL
;
1303 crtcs
= kcalloc(dev
->mode_config
.num_connector
,
1304 sizeof(struct drm_fb_helper_crtc
*), GFP_KERNEL
);
1305 modes
= kcalloc(dev
->mode_config
.num_connector
,
1306 sizeof(struct drm_display_mode
*), GFP_KERNEL
);
1307 enabled
= kcalloc(dev
->mode_config
.num_connector
,
1308 sizeof(bool), GFP_KERNEL
);
1310 drm_enable_connectors(fb_helper
, enabled
);
1312 ret
= drm_target_cloned(fb_helper
, modes
, enabled
, width
, height
);
1314 ret
= drm_target_preferred(fb_helper
, modes
, enabled
, width
, height
);
1316 DRM_ERROR("Unable to find initial modes\n");
1319 DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width
, height
);
1321 drm_pick_crtcs(fb_helper
, crtcs
, modes
, 0, width
, height
);
1323 /* need to set the modesets up here for use later */
1324 /* fill out the connector<->crtc mappings into the modesets */
1325 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
1326 modeset
= &fb_helper
->crtc_info
[i
].mode_set
;
1327 modeset
->num_connectors
= 0;
1330 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
1331 struct drm_display_mode
*mode
= modes
[i
];
1332 struct drm_fb_helper_crtc
*fb_crtc
= crtcs
[i
];
1333 modeset
= &fb_crtc
->mode_set
;
1335 if (mode
&& fb_crtc
) {
1336 DRM_DEBUG_KMS("desired mode %s set on crtc %d\n",
1337 mode
->name
, fb_crtc
->mode_set
.crtc
->base
.id
);
1338 fb_crtc
->desired_mode
= mode
;
1340 drm_mode_destroy(dev
, modeset
->mode
);
1341 modeset
->mode
= drm_mode_duplicate(dev
,
1342 fb_crtc
->desired_mode
);
1343 modeset
->connectors
[modeset
->num_connectors
++] = fb_helper
->connector_info
[i
]->connector
;
1353 * drm_helper_initial_config - setup a sane initial connector configuration
1357 * Called at init time, must take mode config lock.
1359 * Scan the CRTCs and connectors and try to put together an initial setup.
1360 * At the moment, this is a cloned configuration across all heads with
1361 * a new framebuffer object as the backing store.
1364 * Zero if everything went ok, nonzero otherwise.
1366 bool drm_fb_helper_initial_config(struct drm_fb_helper
*fb_helper
, int bpp_sel
)
1368 struct drm_device
*dev
= fb_helper
->dev
;
1371 /* disable all the possible outputs/crtcs before entering KMS mode */
1372 drm_helper_disable_unused_functions(fb_helper
->dev
);
1374 drm_fb_helper_parse_command_line(fb_helper
);
1376 count
= drm_fb_helper_probe_connector_modes(fb_helper
,
1377 dev
->mode_config
.max_width
,
1378 dev
->mode_config
.max_height
);
1380 * we shouldn't end up with no modes here.
1383 printk(KERN_INFO
"No connectors reported connected with modes\n");
1385 drm_setup_crtcs(fb_helper
);
1387 return drm_fb_helper_single_fb_probe(fb_helper
, bpp_sel
);
1389 EXPORT_SYMBOL(drm_fb_helper_initial_config
);
1392 * drm_fb_helper_hotplug_event - respond to a hotplug notification by
1393 * probing all the outputs attached to the fb.
1394 * @fb_helper: the drm_fb_helper
1397 * Called at runtime, must take mode config lock.
1399 * Scan the connectors attached to the fb_helper and try to put together a
1400 * setup after *notification of a change in output configuration.
1403 * 0 on success and a non-zero error code otherwise.
1405 int drm_fb_helper_hotplug_event(struct drm_fb_helper
*fb_helper
)
1407 struct drm_device
*dev
= fb_helper
->dev
;
1409 u32 max_width
, max_height
, bpp_sel
;
1410 bool bound
= false, crtcs_bound
= false;
1411 struct drm_crtc
*crtc
;
1416 mutex_lock(&dev
->mode_config
.mutex
);
1417 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
1420 if (crtc
->fb
== fb_helper
->fb
)
1424 if (!bound
&& crtcs_bound
) {
1425 fb_helper
->delayed_hotplug
= true;
1426 mutex_unlock(&dev
->mode_config
.mutex
);
1429 DRM_DEBUG_KMS("\n");
1431 max_width
= fb_helper
->fb
->width
;
1432 max_height
= fb_helper
->fb
->height
;
1433 bpp_sel
= fb_helper
->fb
->bits_per_pixel
;
1435 count
= drm_fb_helper_probe_connector_modes(fb_helper
, max_width
,
1437 drm_setup_crtcs(fb_helper
);
1438 mutex_unlock(&dev
->mode_config
.mutex
);
1440 return drm_fb_helper_single_fb_probe(fb_helper
, bpp_sel
);
1442 EXPORT_SYMBOL(drm_fb_helper_hotplug_event
);
1444 /* The Kconfig DRM_KMS_HELPER selects FRAMEBUFFER_CONSOLE (if !EXPERT)
1445 * but the module doesn't depend on any fb console symbols. At least
1446 * attempt to load fbcon to avoid leaving the system without a usable console.
1448 #if defined(CONFIG_FRAMEBUFFER_CONSOLE_MODULE) && !defined(CONFIG_EXPERT)
1449 static int __init
drm_fb_helper_modinit(void)
1451 const char *name
= "fbcon";
1452 struct module
*fbcon
;
1454 mutex_lock(&module_mutex
);
1455 fbcon
= find_module(name
);
1456 mutex_unlock(&module_mutex
);
1459 request_module_nowait(name
);
1463 module_init(drm_fb_helper_modinit
);