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
);
73 static int drm_fb_helper_parse_command_line(struct drm_fb_helper
*fb_helper
)
75 struct drm_fb_helper_connector
*fb_helper_conn
;
78 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
79 struct drm_cmdline_mode
*mode
;
80 struct drm_connector
*connector
;
83 fb_helper_conn
= fb_helper
->connector_info
[i
];
84 connector
= fb_helper_conn
->connector
;
85 mode
= &fb_helper_conn
->cmdline_mode
;
87 /* do something on return - turn off connector maybe */
88 if (fb_get_options(drm_get_connector_name(connector
), &option
))
91 if (drm_mode_parse_command_line_for_connector(option
,
96 switch (mode
->force
) {
97 case DRM_FORCE_OFF
: s
= "OFF"; break;
98 case DRM_FORCE_ON_DIGITAL
: s
= "ON - dig"; break;
100 case DRM_FORCE_ON
: s
= "ON"; break;
103 DRM_INFO("forcing %s connector %s\n",
104 drm_get_connector_name(connector
), s
);
105 connector
->force
= mode
->force
;
108 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n",
109 drm_get_connector_name(connector
),
110 mode
->xres
, mode
->yres
,
111 mode
->refresh_specified
? mode
->refresh
: 60,
112 mode
->rb
? " reduced blanking" : "",
113 mode
->margins
? " with margins" : "",
114 mode
->interlace
? " interlaced" : "");
121 static void drm_fb_helper_save_lut_atomic(struct drm_crtc
*crtc
, struct drm_fb_helper
*helper
)
123 uint16_t *r_base
, *g_base
, *b_base
;
126 r_base
= crtc
->gamma_store
;
127 g_base
= r_base
+ crtc
->gamma_size
;
128 b_base
= g_base
+ crtc
->gamma_size
;
130 for (i
= 0; i
< crtc
->gamma_size
; i
++)
131 helper
->funcs
->gamma_get(crtc
, &r_base
[i
], &g_base
[i
], &b_base
[i
], i
);
134 static void drm_fb_helper_restore_lut_atomic(struct drm_crtc
*crtc
)
136 uint16_t *r_base
, *g_base
, *b_base
;
138 r_base
= crtc
->gamma_store
;
139 g_base
= r_base
+ crtc
->gamma_size
;
140 b_base
= g_base
+ crtc
->gamma_size
;
142 crtc
->funcs
->gamma_set(crtc
, r_base
, g_base
, b_base
, 0, crtc
->gamma_size
);
145 int drm_fb_helper_debug_enter(struct fb_info
*info
)
147 struct drm_fb_helper
*helper
= info
->par
;
148 struct drm_crtc_helper_funcs
*funcs
;
151 if (list_empty(&kernel_fb_helper_list
))
154 list_for_each_entry(helper
, &kernel_fb_helper_list
, kernel_fb_list
) {
155 for (i
= 0; i
< helper
->crtc_count
; i
++) {
156 struct drm_mode_set
*mode_set
=
157 &helper
->crtc_info
[i
].mode_set
;
159 if (!mode_set
->crtc
->enabled
)
162 funcs
= mode_set
->crtc
->helper_private
;
163 drm_fb_helper_save_lut_atomic(mode_set
->crtc
, helper
);
164 funcs
->mode_set_base_atomic(mode_set
->crtc
,
168 ENTER_ATOMIC_MODE_SET
);
174 EXPORT_SYMBOL(drm_fb_helper_debug_enter
);
176 /* Find the real fb for a given fb helper CRTC */
177 static struct drm_framebuffer
*drm_mode_config_fb(struct drm_crtc
*crtc
)
179 struct drm_device
*dev
= crtc
->dev
;
182 list_for_each_entry(c
, &dev
->mode_config
.crtc_list
, head
) {
183 if (crtc
->base
.id
== c
->base
.id
)
190 int drm_fb_helper_debug_leave(struct fb_info
*info
)
192 struct drm_fb_helper
*helper
= info
->par
;
193 struct drm_crtc
*crtc
;
194 struct drm_crtc_helper_funcs
*funcs
;
195 struct drm_framebuffer
*fb
;
198 for (i
= 0; i
< helper
->crtc_count
; i
++) {
199 struct drm_mode_set
*mode_set
= &helper
->crtc_info
[i
].mode_set
;
200 crtc
= mode_set
->crtc
;
201 funcs
= crtc
->helper_private
;
202 fb
= drm_mode_config_fb(crtc
);
208 DRM_ERROR("no fb to restore??\n");
212 drm_fb_helper_restore_lut_atomic(mode_set
->crtc
);
213 funcs
->mode_set_base_atomic(mode_set
->crtc
, fb
, crtc
->x
,
214 crtc
->y
, LEAVE_ATOMIC_MODE_SET
);
219 EXPORT_SYMBOL(drm_fb_helper_debug_leave
);
221 bool drm_fb_helper_restore_fbdev_mode(struct drm_fb_helper
*fb_helper
)
225 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
226 struct drm_mode_set
*mode_set
= &fb_helper
->crtc_info
[i
].mode_set
;
227 ret
= drm_crtc_helper_set_config(mode_set
);
233 EXPORT_SYMBOL(drm_fb_helper_restore_fbdev_mode
);
235 bool drm_fb_helper_force_kernel_mode(void)
237 bool ret
, error
= false;
238 struct drm_fb_helper
*helper
;
240 if (list_empty(&kernel_fb_helper_list
))
243 list_for_each_entry(helper
, &kernel_fb_helper_list
, kernel_fb_list
) {
244 if (helper
->dev
->switch_power_state
== DRM_SWITCH_POWER_OFF
)
247 ret
= drm_fb_helper_restore_fbdev_mode(helper
);
254 int drm_fb_helper_panic(struct notifier_block
*n
, unsigned long ununsed
,
257 printk(KERN_ERR
"panic occurred, switching back to text console\n");
258 return drm_fb_helper_force_kernel_mode();
260 EXPORT_SYMBOL(drm_fb_helper_panic
);
262 static struct notifier_block paniced
= {
263 .notifier_call
= drm_fb_helper_panic
,
267 * drm_fb_helper_restore - restore the framebuffer console (kernel) config
269 * Restore's the kernel's fbcon mode, used for lastclose & panic paths.
271 void drm_fb_helper_restore(void)
274 ret
= drm_fb_helper_force_kernel_mode();
276 DRM_ERROR("Failed to restore crtc configuration\n");
278 EXPORT_SYMBOL(drm_fb_helper_restore
);
280 #ifdef CONFIG_MAGIC_SYSRQ
281 static void drm_fb_helper_restore_work_fn(struct work_struct
*ignored
)
283 drm_fb_helper_restore();
285 static DECLARE_WORK(drm_fb_helper_restore_work
, drm_fb_helper_restore_work_fn
);
287 static void drm_fb_helper_sysrq(int dummy1
)
289 schedule_work(&drm_fb_helper_restore_work
);
292 static struct sysrq_key_op sysrq_drm_fb_helper_restore_op
= {
293 .handler
= drm_fb_helper_sysrq
,
294 .help_msg
= "force-fb(V)",
295 .action_msg
= "Restore framebuffer console",
298 static struct sysrq_key_op sysrq_drm_fb_helper_restore_op
= { };
301 static void drm_fb_helper_on(struct fb_info
*info
)
303 struct drm_fb_helper
*fb_helper
= info
->par
;
304 struct drm_device
*dev
= fb_helper
->dev
;
305 struct drm_crtc
*crtc
;
306 struct drm_crtc_helper_funcs
*crtc_funcs
;
307 struct drm_connector
*connector
;
308 struct drm_encoder
*encoder
;
312 * For each CRTC in this fb, turn the crtc on then,
313 * find all associated encoders and turn them on.
315 mutex_lock(&dev
->mode_config
.mutex
);
316 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
317 crtc
= fb_helper
->crtc_info
[i
].mode_set
.crtc
;
318 crtc_funcs
= crtc
->helper_private
;
323 crtc_funcs
->dpms(crtc
, DRM_MODE_DPMS_ON
);
325 /* Walk the connectors & encoders on this fb turning them on */
326 for (j
= 0; j
< fb_helper
->connector_count
; j
++) {
327 connector
= fb_helper
->connector_info
[j
]->connector
;
328 connector
->dpms
= DRM_MODE_DPMS_ON
;
329 drm_connector_property_set_value(connector
,
330 dev
->mode_config
.dpms_property
,
333 /* Found a CRTC on this fb, now find encoders */
334 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
335 if (encoder
->crtc
== crtc
) {
336 struct drm_encoder_helper_funcs
*encoder_funcs
;
338 encoder_funcs
= encoder
->helper_private
;
339 encoder_funcs
->dpms(encoder
, DRM_MODE_DPMS_ON
);
343 mutex_unlock(&dev
->mode_config
.mutex
);
346 static void drm_fb_helper_off(struct fb_info
*info
, int dpms_mode
)
348 struct drm_fb_helper
*fb_helper
= info
->par
;
349 struct drm_device
*dev
= fb_helper
->dev
;
350 struct drm_crtc
*crtc
;
351 struct drm_crtc_helper_funcs
*crtc_funcs
;
352 struct drm_connector
*connector
;
353 struct drm_encoder
*encoder
;
357 * For each CRTC in this fb, find all associated encoders
358 * and turn them off, then turn off the CRTC.
360 mutex_lock(&dev
->mode_config
.mutex
);
361 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
362 crtc
= fb_helper
->crtc_info
[i
].mode_set
.crtc
;
363 crtc_funcs
= crtc
->helper_private
;
368 /* Walk the connectors on this fb and mark them off */
369 for (j
= 0; j
< fb_helper
->connector_count
; j
++) {
370 connector
= fb_helper
->connector_info
[j
]->connector
;
371 connector
->dpms
= dpms_mode
;
372 drm_connector_property_set_value(connector
,
373 dev
->mode_config
.dpms_property
,
376 /* Found a CRTC on this fb, now find encoders */
377 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
378 if (encoder
->crtc
== crtc
) {
379 struct drm_encoder_helper_funcs
*encoder_funcs
;
381 encoder_funcs
= encoder
->helper_private
;
382 encoder_funcs
->dpms(encoder
, dpms_mode
);
385 crtc_funcs
->dpms(crtc
, DRM_MODE_DPMS_OFF
);
387 mutex_unlock(&dev
->mode_config
.mutex
);
390 int drm_fb_helper_blank(int blank
, struct fb_info
*info
)
393 /* Display: On; HSync: On, VSync: On */
394 case FB_BLANK_UNBLANK
:
395 drm_fb_helper_on(info
);
397 /* Display: Off; HSync: On, VSync: On */
398 case FB_BLANK_NORMAL
:
399 drm_fb_helper_off(info
, DRM_MODE_DPMS_STANDBY
);
401 /* Display: Off; HSync: Off, VSync: On */
402 case FB_BLANK_HSYNC_SUSPEND
:
403 drm_fb_helper_off(info
, DRM_MODE_DPMS_STANDBY
);
405 /* Display: Off; HSync: On, VSync: Off */
406 case FB_BLANK_VSYNC_SUSPEND
:
407 drm_fb_helper_off(info
, DRM_MODE_DPMS_SUSPEND
);
409 /* Display: Off; HSync: Off, VSync: Off */
410 case FB_BLANK_POWERDOWN
:
411 drm_fb_helper_off(info
, DRM_MODE_DPMS_OFF
);
416 EXPORT_SYMBOL(drm_fb_helper_blank
);
418 static void drm_fb_helper_crtc_free(struct drm_fb_helper
*helper
)
422 for (i
= 0; i
< helper
->connector_count
; i
++)
423 kfree(helper
->connector_info
[i
]);
424 kfree(helper
->connector_info
);
425 for (i
= 0; i
< helper
->crtc_count
; i
++)
426 kfree(helper
->crtc_info
[i
].mode_set
.connectors
);
427 kfree(helper
->crtc_info
);
430 int drm_fb_helper_init(struct drm_device
*dev
,
431 struct drm_fb_helper
*fb_helper
,
432 int crtc_count
, int max_conn_count
)
434 struct drm_crtc
*crtc
;
438 fb_helper
->dev
= dev
;
440 INIT_LIST_HEAD(&fb_helper
->kernel_fb_list
);
442 fb_helper
->crtc_info
= kcalloc(crtc_count
, sizeof(struct drm_fb_helper_crtc
), GFP_KERNEL
);
443 if (!fb_helper
->crtc_info
)
446 fb_helper
->crtc_count
= crtc_count
;
447 fb_helper
->connector_info
= kcalloc(dev
->mode_config
.num_connector
, sizeof(struct drm_fb_helper_connector
*), GFP_KERNEL
);
448 if (!fb_helper
->connector_info
) {
449 kfree(fb_helper
->crtc_info
);
452 fb_helper
->connector_count
= 0;
454 for (i
= 0; i
< crtc_count
; i
++) {
455 fb_helper
->crtc_info
[i
].mode_set
.connectors
=
456 kcalloc(max_conn_count
,
457 sizeof(struct drm_connector
*),
460 if (!fb_helper
->crtc_info
[i
].mode_set
.connectors
) {
464 fb_helper
->crtc_info
[i
].mode_set
.num_connectors
= 0;
468 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
469 fb_helper
->crtc_info
[i
].crtc_id
= crtc
->base
.id
;
470 fb_helper
->crtc_info
[i
].mode_set
.crtc
= crtc
;
473 fb_helper
->conn_limit
= max_conn_count
;
476 drm_fb_helper_crtc_free(fb_helper
);
479 EXPORT_SYMBOL(drm_fb_helper_init
);
481 void drm_fb_helper_fini(struct drm_fb_helper
*fb_helper
)
483 if (!list_empty(&fb_helper
->kernel_fb_list
)) {
484 list_del(&fb_helper
->kernel_fb_list
);
485 if (list_empty(&kernel_fb_helper_list
)) {
486 printk(KERN_INFO
"drm: unregistered panic notifier\n");
487 atomic_notifier_chain_unregister(&panic_notifier_list
,
489 unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op
);
493 drm_fb_helper_crtc_free(fb_helper
);
496 EXPORT_SYMBOL(drm_fb_helper_fini
);
498 static int setcolreg(struct drm_crtc
*crtc
, u16 red
, u16 green
,
499 u16 blue
, u16 regno
, struct fb_info
*info
)
501 struct drm_fb_helper
*fb_helper
= info
->par
;
502 struct drm_framebuffer
*fb
= fb_helper
->fb
;
505 if (info
->fix
.visual
== FB_VISUAL_TRUECOLOR
) {
508 /* place color in psuedopalette */
511 palette
= (u32
*)info
->pseudo_palette
;
512 red
>>= (16 - info
->var
.red
.length
);
513 green
>>= (16 - info
->var
.green
.length
);
514 blue
>>= (16 - info
->var
.blue
.length
);
515 value
= (red
<< info
->var
.red
.offset
) |
516 (green
<< info
->var
.green
.offset
) |
517 (blue
<< info
->var
.blue
.offset
);
518 if (info
->var
.transp
.length
> 0) {
519 u32 mask
= (1 << info
->var
.transp
.length
) - 1;
520 mask
<<= info
->var
.transp
.offset
;
523 palette
[regno
] = value
;
529 if (fb
->bits_per_pixel
== 16) {
532 if (fb
->depth
== 16 && regno
> 63)
534 if (fb
->depth
== 15 && regno
> 31)
537 if (fb
->depth
== 16) {
541 for (i
= 0; i
< 8; i
++)
542 fb_helper
->funcs
->gamma_set(crtc
, red
,
543 green
, blue
, pindex
+ i
);
546 fb_helper
->funcs
->gamma_get(crtc
, &r
,
550 for (i
= 0; i
< 4; i
++)
551 fb_helper
->funcs
->gamma_set(crtc
, r
,
558 fb_helper
->funcs
->gamma_set(crtc
, red
, green
, blue
, pindex
);
562 int drm_fb_helper_setcmap(struct fb_cmap
*cmap
, struct fb_info
*info
)
564 struct drm_fb_helper
*fb_helper
= info
->par
;
565 struct drm_crtc_helper_funcs
*crtc_funcs
;
566 u16
*red
, *green
, *blue
, *transp
;
567 struct drm_crtc
*crtc
;
571 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
572 crtc
= fb_helper
->crtc_info
[i
].mode_set
.crtc
;
573 crtc_funcs
= crtc
->helper_private
;
578 transp
= cmap
->transp
;
581 for (j
= 0; j
< cmap
->len
; j
++) {
582 u16 hred
, hgreen
, hblue
, htransp
= 0xffff;
591 rc
= setcolreg(crtc
, hred
, hgreen
, hblue
, start
++, info
);
595 crtc_funcs
->load_lut(crtc
);
599 EXPORT_SYMBOL(drm_fb_helper_setcmap
);
601 int drm_fb_helper_check_var(struct fb_var_screeninfo
*var
,
602 struct fb_info
*info
)
604 struct drm_fb_helper
*fb_helper
= info
->par
;
605 struct drm_framebuffer
*fb
= fb_helper
->fb
;
608 if (var
->pixclock
!= 0 || in_dbg_master())
611 /* Need to resize the fb object !!! */
612 if (var
->bits_per_pixel
> fb
->bits_per_pixel
|| var
->xres
> fb
->width
|| var
->yres
> fb
->height
) {
613 DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb "
614 "object %dx%d-%d > %dx%d-%d\n", var
->xres
, var
->yres
, var
->bits_per_pixel
,
615 fb
->width
, fb
->height
, fb
->bits_per_pixel
);
619 switch (var
->bits_per_pixel
) {
621 depth
= (var
->green
.length
== 6) ? 16 : 15;
624 depth
= (var
->transp
.length
> 0) ? 32 : 24;
627 depth
= var
->bits_per_pixel
;
634 var
->green
.offset
= 0;
635 var
->blue
.offset
= 0;
637 var
->green
.length
= 8;
638 var
->blue
.length
= 8;
639 var
->transp
.length
= 0;
640 var
->transp
.offset
= 0;
643 var
->red
.offset
= 10;
644 var
->green
.offset
= 5;
645 var
->blue
.offset
= 0;
647 var
->green
.length
= 5;
648 var
->blue
.length
= 5;
649 var
->transp
.length
= 1;
650 var
->transp
.offset
= 15;
653 var
->red
.offset
= 11;
654 var
->green
.offset
= 5;
655 var
->blue
.offset
= 0;
657 var
->green
.length
= 6;
658 var
->blue
.length
= 5;
659 var
->transp
.length
= 0;
660 var
->transp
.offset
= 0;
663 var
->red
.offset
= 16;
664 var
->green
.offset
= 8;
665 var
->blue
.offset
= 0;
667 var
->green
.length
= 8;
668 var
->blue
.length
= 8;
669 var
->transp
.length
= 0;
670 var
->transp
.offset
= 0;
673 var
->red
.offset
= 16;
674 var
->green
.offset
= 8;
675 var
->blue
.offset
= 0;
677 var
->green
.length
= 8;
678 var
->blue
.length
= 8;
679 var
->transp
.length
= 8;
680 var
->transp
.offset
= 24;
687 EXPORT_SYMBOL(drm_fb_helper_check_var
);
689 /* this will let fbcon do the mode init */
690 int drm_fb_helper_set_par(struct fb_info
*info
)
692 struct drm_fb_helper
*fb_helper
= info
->par
;
693 struct drm_device
*dev
= fb_helper
->dev
;
694 struct fb_var_screeninfo
*var
= &info
->var
;
695 struct drm_crtc
*crtc
;
699 if (var
->pixclock
!= 0) {
700 DRM_ERROR("PIXEL CLOCK SET\n");
704 mutex_lock(&dev
->mode_config
.mutex
);
705 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
706 crtc
= fb_helper
->crtc_info
[i
].mode_set
.crtc
;
707 ret
= crtc
->funcs
->set_config(&fb_helper
->crtc_info
[i
].mode_set
);
709 mutex_unlock(&dev
->mode_config
.mutex
);
713 mutex_unlock(&dev
->mode_config
.mutex
);
715 if (fb_helper
->delayed_hotplug
) {
716 fb_helper
->delayed_hotplug
= false;
717 drm_fb_helper_hotplug_event(fb_helper
);
721 EXPORT_SYMBOL(drm_fb_helper_set_par
);
723 int drm_fb_helper_pan_display(struct fb_var_screeninfo
*var
,
724 struct fb_info
*info
)
726 struct drm_fb_helper
*fb_helper
= info
->par
;
727 struct drm_device
*dev
= fb_helper
->dev
;
728 struct drm_mode_set
*modeset
;
729 struct drm_crtc
*crtc
;
733 mutex_lock(&dev
->mode_config
.mutex
);
734 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
735 crtc
= fb_helper
->crtc_info
[i
].mode_set
.crtc
;
737 modeset
= &fb_helper
->crtc_info
[i
].mode_set
;
739 modeset
->x
= var
->xoffset
;
740 modeset
->y
= var
->yoffset
;
742 if (modeset
->num_connectors
) {
743 ret
= crtc
->funcs
->set_config(modeset
);
745 info
->var
.xoffset
= var
->xoffset
;
746 info
->var
.yoffset
= var
->yoffset
;
750 mutex_unlock(&dev
->mode_config
.mutex
);
753 EXPORT_SYMBOL(drm_fb_helper_pan_display
);
755 int drm_fb_helper_single_fb_probe(struct drm_fb_helper
*fb_helper
,
761 struct fb_info
*info
;
762 struct drm_fb_helper_surface_size sizes
;
765 memset(&sizes
, 0, sizeof(struct drm_fb_helper_surface_size
));
766 sizes
.surface_depth
= 24;
767 sizes
.surface_bpp
= 32;
768 sizes
.fb_width
= (unsigned)-1;
769 sizes
.fb_height
= (unsigned)-1;
771 /* if driver picks 8 or 16 by default use that
772 for both depth/bpp */
773 if (preferred_bpp
!= sizes
.surface_bpp
) {
774 sizes
.surface_depth
= sizes
.surface_bpp
= preferred_bpp
;
776 /* first up get a count of crtcs now in use and new min/maxes width/heights */
777 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
778 struct drm_fb_helper_connector
*fb_helper_conn
= fb_helper
->connector_info
[i
];
779 struct drm_cmdline_mode
*cmdline_mode
;
781 cmdline_mode
= &fb_helper_conn
->cmdline_mode
;
783 if (cmdline_mode
->bpp_specified
) {
784 switch (cmdline_mode
->bpp
) {
786 sizes
.surface_depth
= sizes
.surface_bpp
= 8;
789 sizes
.surface_depth
= 15;
790 sizes
.surface_bpp
= 16;
793 sizes
.surface_depth
= sizes
.surface_bpp
= 16;
796 sizes
.surface_depth
= sizes
.surface_bpp
= 24;
799 sizes
.surface_depth
= 24;
800 sizes
.surface_bpp
= 32;
808 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
809 struct drm_display_mode
*desired_mode
;
810 desired_mode
= fb_helper
->crtc_info
[i
].desired_mode
;
814 gamma_size
= fb_helper
->crtc_info
[i
].mode_set
.crtc
->gamma_size
;
815 if (desired_mode
->hdisplay
< sizes
.fb_width
)
816 sizes
.fb_width
= desired_mode
->hdisplay
;
817 if (desired_mode
->vdisplay
< sizes
.fb_height
)
818 sizes
.fb_height
= desired_mode
->vdisplay
;
819 if (desired_mode
->hdisplay
> sizes
.surface_width
)
820 sizes
.surface_width
= desired_mode
->hdisplay
;
821 if (desired_mode
->vdisplay
> sizes
.surface_height
)
822 sizes
.surface_height
= desired_mode
->vdisplay
;
827 if (crtc_count
== 0 || sizes
.fb_width
== -1 || sizes
.fb_height
== -1) {
828 /* hmm everyone went away - assume VGA cable just fell out
829 and will come back later. */
830 DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n");
831 sizes
.fb_width
= sizes
.surface_width
= 1024;
832 sizes
.fb_height
= sizes
.surface_height
= 768;
835 /* push down into drivers */
836 new_fb
= (*fb_helper
->funcs
->fb_probe
)(fb_helper
, &sizes
);
840 info
= fb_helper
->fbdev
;
842 /* set the fb pointer */
843 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
844 fb_helper
->crtc_info
[i
].mode_set
.fb
= fb_helper
->fb
;
848 info
->var
.pixclock
= 0;
849 if (register_framebuffer(info
) < 0) {
853 printk(KERN_INFO
"fb%d: %s frame buffer device\n", info
->node
,
857 drm_fb_helper_set_par(info
);
860 /* Switch back to kernel console on panic */
861 /* multi card linked list maybe */
862 if (list_empty(&kernel_fb_helper_list
)) {
863 printk(KERN_INFO
"drm: registered panic notifier\n");
864 atomic_notifier_chain_register(&panic_notifier_list
,
866 register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op
);
869 list_add(&fb_helper
->kernel_fb_list
, &kernel_fb_helper_list
);
873 EXPORT_SYMBOL(drm_fb_helper_single_fb_probe
);
875 void drm_fb_helper_fill_fix(struct fb_info
*info
, uint32_t pitch
,
878 info
->fix
.type
= FB_TYPE_PACKED_PIXELS
;
879 info
->fix
.visual
= depth
== 8 ? FB_VISUAL_PSEUDOCOLOR
:
881 info
->fix
.mmio_start
= 0;
882 info
->fix
.mmio_len
= 0;
883 info
->fix
.type_aux
= 0;
884 info
->fix
.xpanstep
= 1; /* doing it in hw */
885 info
->fix
.ypanstep
= 1; /* doing it in hw */
886 info
->fix
.ywrapstep
= 0;
887 info
->fix
.accel
= FB_ACCEL_NONE
;
888 info
->fix
.type_aux
= 0;
890 info
->fix
.line_length
= pitch
;
893 EXPORT_SYMBOL(drm_fb_helper_fill_fix
);
895 void drm_fb_helper_fill_var(struct fb_info
*info
, struct drm_fb_helper
*fb_helper
,
896 uint32_t fb_width
, uint32_t fb_height
)
898 struct drm_framebuffer
*fb
= fb_helper
->fb
;
899 info
->pseudo_palette
= fb_helper
->pseudo_palette
;
900 info
->var
.xres_virtual
= fb
->width
;
901 info
->var
.yres_virtual
= fb
->height
;
902 info
->var
.bits_per_pixel
= fb
->bits_per_pixel
;
903 info
->var
.accel_flags
= FB_ACCELF_TEXT
;
904 info
->var
.xoffset
= 0;
905 info
->var
.yoffset
= 0;
906 info
->var
.activate
= FB_ACTIVATE_NOW
;
907 info
->var
.height
= -1;
908 info
->var
.width
= -1;
912 info
->var
.red
.offset
= 0;
913 info
->var
.green
.offset
= 0;
914 info
->var
.blue
.offset
= 0;
915 info
->var
.red
.length
= 8; /* 8bit DAC */
916 info
->var
.green
.length
= 8;
917 info
->var
.blue
.length
= 8;
918 info
->var
.transp
.offset
= 0;
919 info
->var
.transp
.length
= 0;
922 info
->var
.red
.offset
= 10;
923 info
->var
.green
.offset
= 5;
924 info
->var
.blue
.offset
= 0;
925 info
->var
.red
.length
= 5;
926 info
->var
.green
.length
= 5;
927 info
->var
.blue
.length
= 5;
928 info
->var
.transp
.offset
= 15;
929 info
->var
.transp
.length
= 1;
932 info
->var
.red
.offset
= 11;
933 info
->var
.green
.offset
= 5;
934 info
->var
.blue
.offset
= 0;
935 info
->var
.red
.length
= 5;
936 info
->var
.green
.length
= 6;
937 info
->var
.blue
.length
= 5;
938 info
->var
.transp
.offset
= 0;
941 info
->var
.red
.offset
= 16;
942 info
->var
.green
.offset
= 8;
943 info
->var
.blue
.offset
= 0;
944 info
->var
.red
.length
= 8;
945 info
->var
.green
.length
= 8;
946 info
->var
.blue
.length
= 8;
947 info
->var
.transp
.offset
= 0;
948 info
->var
.transp
.length
= 0;
951 info
->var
.red
.offset
= 16;
952 info
->var
.green
.offset
= 8;
953 info
->var
.blue
.offset
= 0;
954 info
->var
.red
.length
= 8;
955 info
->var
.green
.length
= 8;
956 info
->var
.blue
.length
= 8;
957 info
->var
.transp
.offset
= 24;
958 info
->var
.transp
.length
= 8;
964 info
->var
.xres
= fb_width
;
965 info
->var
.yres
= fb_height
;
967 EXPORT_SYMBOL(drm_fb_helper_fill_var
);
969 static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper
*fb_helper
,
973 struct drm_connector
*connector
;
977 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
978 connector
= fb_helper
->connector_info
[i
]->connector
;
979 count
+= connector
->funcs
->fill_modes(connector
, maxX
, maxY
);
985 static struct drm_display_mode
*drm_has_preferred_mode(struct drm_fb_helper_connector
*fb_connector
, int width
, int height
)
987 struct drm_display_mode
*mode
;
989 list_for_each_entry(mode
, &fb_connector
->connector
->modes
, head
) {
990 if (drm_mode_width(mode
) > width
||
991 drm_mode_height(mode
) > height
)
993 if (mode
->type
& DRM_MODE_TYPE_PREFERRED
)
999 static bool drm_has_cmdline_mode(struct drm_fb_helper_connector
*fb_connector
)
1001 struct drm_cmdline_mode
*cmdline_mode
;
1002 cmdline_mode
= &fb_connector
->cmdline_mode
;
1003 return cmdline_mode
->specified
;
1006 static struct drm_display_mode
*drm_pick_cmdline_mode(struct drm_fb_helper_connector
*fb_helper_conn
,
1007 int width
, int height
)
1009 struct drm_cmdline_mode
*cmdline_mode
;
1010 struct drm_display_mode
*mode
= NULL
;
1012 cmdline_mode
= &fb_helper_conn
->cmdline_mode
;
1013 if (cmdline_mode
->specified
== false)
1016 /* attempt to find a matching mode in the list of modes
1017 * we have gotten so far, if not add a CVT mode that conforms
1019 if (cmdline_mode
->rb
|| cmdline_mode
->margins
)
1022 list_for_each_entry(mode
, &fb_helper_conn
->connector
->modes
, head
) {
1023 /* check width/height */
1024 if (mode
->hdisplay
!= cmdline_mode
->xres
||
1025 mode
->vdisplay
!= cmdline_mode
->yres
)
1028 if (cmdline_mode
->refresh_specified
) {
1029 if (mode
->vrefresh
!= cmdline_mode
->refresh
)
1033 if (cmdline_mode
->interlace
) {
1034 if (!(mode
->flags
& DRM_MODE_FLAG_INTERLACE
))
1041 mode
= drm_mode_create_from_cmdline_mode(fb_helper_conn
->connector
->dev
,
1043 list_add(&mode
->head
, &fb_helper_conn
->connector
->modes
);
1047 static bool drm_connector_enabled(struct drm_connector
*connector
, bool strict
)
1052 enable
= connector
->status
== connector_status_connected
;
1054 enable
= connector
->status
!= connector_status_disconnected
;
1059 static void drm_enable_connectors(struct drm_fb_helper
*fb_helper
,
1062 bool any_enabled
= false;
1063 struct drm_connector
*connector
;
1066 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
1067 connector
= fb_helper
->connector_info
[i
]->connector
;
1068 enabled
[i
] = drm_connector_enabled(connector
, true);
1069 DRM_DEBUG_KMS("connector %d enabled? %s\n", connector
->base
.id
,
1070 enabled
[i
] ? "yes" : "no");
1071 any_enabled
|= enabled
[i
];
1077 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
1078 connector
= fb_helper
->connector_info
[i
]->connector
;
1079 enabled
[i
] = drm_connector_enabled(connector
, false);
1083 static bool drm_target_cloned(struct drm_fb_helper
*fb_helper
,
1084 struct drm_display_mode
**modes
,
1085 bool *enabled
, int width
, int height
)
1088 bool can_clone
= false;
1089 struct drm_fb_helper_connector
*fb_helper_conn
;
1090 struct drm_display_mode
*dmt_mode
, *mode
;
1092 /* only contemplate cloning in the single crtc case */
1093 if (fb_helper
->crtc_count
> 1)
1097 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
1102 /* only contemplate cloning if more than one connector is enabled */
1106 /* check the command line or if nothing common pick 1024x768 */
1108 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
1111 fb_helper_conn
= fb_helper
->connector_info
[i
];
1112 modes
[i
] = drm_pick_cmdline_mode(fb_helper_conn
, width
, height
);
1117 for (j
= 0; j
< i
; j
++) {
1120 if (!drm_mode_equal(modes
[j
], modes
[i
]))
1126 DRM_DEBUG_KMS("can clone using command line\n");
1130 /* try and find a 1024x768 mode on each connector */
1132 dmt_mode
= drm_mode_find_dmt(fb_helper
->dev
, 1024, 768, 60);
1134 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
1139 fb_helper_conn
= fb_helper
->connector_info
[i
];
1140 list_for_each_entry(mode
, &fb_helper_conn
->connector
->modes
, head
) {
1141 if (drm_mode_equal(mode
, dmt_mode
))
1149 DRM_DEBUG_KMS("can clone using 1024x768\n");
1152 DRM_INFO("kms: can't enable cloning when we probably wanted to.\n");
1156 static bool drm_target_preferred(struct drm_fb_helper
*fb_helper
,
1157 struct drm_display_mode
**modes
,
1158 bool *enabled
, int width
, int height
)
1160 struct drm_fb_helper_connector
*fb_helper_conn
;
1163 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
1164 fb_helper_conn
= fb_helper
->connector_info
[i
];
1166 if (enabled
[i
] == false)
1169 DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n",
1170 fb_helper_conn
->connector
->base
.id
);
1172 /* got for command line mode first */
1173 modes
[i
] = drm_pick_cmdline_mode(fb_helper_conn
, width
, height
);
1175 DRM_DEBUG_KMS("looking for preferred mode on connector %d\n",
1176 fb_helper_conn
->connector
->base
.id
);
1177 modes
[i
] = drm_has_preferred_mode(fb_helper_conn
, width
, height
);
1179 /* No preferred modes, pick one off the list */
1180 if (!modes
[i
] && !list_empty(&fb_helper_conn
->connector
->modes
)) {
1181 list_for_each_entry(modes
[i
], &fb_helper_conn
->connector
->modes
, head
)
1184 DRM_DEBUG_KMS("found mode %s\n", modes
[i
] ? modes
[i
]->name
:
1190 static int drm_pick_crtcs(struct drm_fb_helper
*fb_helper
,
1191 struct drm_fb_helper_crtc
**best_crtcs
,
1192 struct drm_display_mode
**modes
,
1193 int n
, int width
, int height
)
1196 struct drm_device
*dev
= fb_helper
->dev
;
1197 struct drm_connector
*connector
;
1198 struct drm_connector_helper_funcs
*connector_funcs
;
1199 struct drm_encoder
*encoder
;
1200 struct drm_fb_helper_crtc
*best_crtc
;
1201 int my_score
, best_score
, score
;
1202 struct drm_fb_helper_crtc
**crtcs
, *crtc
;
1203 struct drm_fb_helper_connector
*fb_helper_conn
;
1205 if (n
== fb_helper
->connector_count
)
1208 fb_helper_conn
= fb_helper
->connector_info
[n
];
1209 connector
= fb_helper_conn
->connector
;
1211 best_crtcs
[n
] = NULL
;
1213 best_score
= drm_pick_crtcs(fb_helper
, best_crtcs
, modes
, n
+1, width
, height
);
1214 if (modes
[n
] == NULL
)
1217 crtcs
= kzalloc(dev
->mode_config
.num_connector
*
1218 sizeof(struct drm_fb_helper_crtc
*), GFP_KERNEL
);
1223 if (connector
->status
== connector_status_connected
)
1225 if (drm_has_cmdline_mode(fb_helper_conn
))
1227 if (drm_has_preferred_mode(fb_helper_conn
, width
, height
))
1230 connector_funcs
= connector
->helper_private
;
1231 encoder
= connector_funcs
->best_encoder(connector
);
1235 /* select a crtc for this connector and then attempt to configure
1236 remaining connectors */
1237 for (c
= 0; c
< fb_helper
->crtc_count
; c
++) {
1238 crtc
= &fb_helper
->crtc_info
[c
];
1240 if ((encoder
->possible_crtcs
& (1 << c
)) == 0) {
1244 for (o
= 0; o
< n
; o
++)
1245 if (best_crtcs
[o
] == crtc
)
1249 /* ignore cloning unless only a single crtc */
1250 if (fb_helper
->crtc_count
> 1)
1253 if (!drm_mode_equal(modes
[o
], modes
[n
]))
1258 memcpy(crtcs
, best_crtcs
, n
* sizeof(struct drm_fb_helper_crtc
*));
1259 score
= my_score
+ drm_pick_crtcs(fb_helper
, crtcs
, modes
, n
+ 1,
1261 if (score
> best_score
) {
1264 memcpy(best_crtcs
, crtcs
,
1265 dev
->mode_config
.num_connector
*
1266 sizeof(struct drm_fb_helper_crtc
*));
1274 static void drm_setup_crtcs(struct drm_fb_helper
*fb_helper
)
1276 struct drm_device
*dev
= fb_helper
->dev
;
1277 struct drm_fb_helper_crtc
**crtcs
;
1278 struct drm_display_mode
**modes
;
1279 struct drm_encoder
*encoder
;
1280 struct drm_mode_set
*modeset
;
1285 DRM_DEBUG_KMS("\n");
1287 width
= dev
->mode_config
.max_width
;
1288 height
= dev
->mode_config
.max_height
;
1290 /* clean out all the encoder/crtc combos */
1291 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
1292 encoder
->crtc
= NULL
;
1295 crtcs
= kcalloc(dev
->mode_config
.num_connector
,
1296 sizeof(struct drm_fb_helper_crtc
*), GFP_KERNEL
);
1297 modes
= kcalloc(dev
->mode_config
.num_connector
,
1298 sizeof(struct drm_display_mode
*), GFP_KERNEL
);
1299 enabled
= kcalloc(dev
->mode_config
.num_connector
,
1300 sizeof(bool), GFP_KERNEL
);
1302 drm_enable_connectors(fb_helper
, enabled
);
1304 ret
= drm_target_cloned(fb_helper
, modes
, enabled
, width
, height
);
1306 ret
= drm_target_preferred(fb_helper
, modes
, enabled
, width
, height
);
1308 DRM_ERROR("Unable to find initial modes\n");
1311 DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width
, height
);
1313 drm_pick_crtcs(fb_helper
, crtcs
, modes
, 0, width
, height
);
1315 /* need to set the modesets up here for use later */
1316 /* fill out the connector<->crtc mappings into the modesets */
1317 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
1318 modeset
= &fb_helper
->crtc_info
[i
].mode_set
;
1319 modeset
->num_connectors
= 0;
1322 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
1323 struct drm_display_mode
*mode
= modes
[i
];
1324 struct drm_fb_helper_crtc
*fb_crtc
= crtcs
[i
];
1325 modeset
= &fb_crtc
->mode_set
;
1327 if (mode
&& fb_crtc
) {
1328 DRM_DEBUG_KMS("desired mode %s set on crtc %d\n",
1329 mode
->name
, fb_crtc
->mode_set
.crtc
->base
.id
);
1330 fb_crtc
->desired_mode
= mode
;
1332 drm_mode_destroy(dev
, modeset
->mode
);
1333 modeset
->mode
= drm_mode_duplicate(dev
,
1334 fb_crtc
->desired_mode
);
1335 modeset
->connectors
[modeset
->num_connectors
++] = fb_helper
->connector_info
[i
]->connector
;
1345 * drm_helper_initial_config - setup a sane initial connector configuration
1349 * Called at init time, must take mode config lock.
1351 * Scan the CRTCs and connectors and try to put together an initial setup.
1352 * At the moment, this is a cloned configuration across all heads with
1353 * a new framebuffer object as the backing store.
1356 * Zero if everything went ok, nonzero otherwise.
1358 bool drm_fb_helper_initial_config(struct drm_fb_helper
*fb_helper
, int bpp_sel
)
1360 struct drm_device
*dev
= fb_helper
->dev
;
1363 /* disable all the possible outputs/crtcs before entering KMS mode */
1364 drm_helper_disable_unused_functions(fb_helper
->dev
);
1366 drm_fb_helper_parse_command_line(fb_helper
);
1368 count
= drm_fb_helper_probe_connector_modes(fb_helper
,
1369 dev
->mode_config
.max_width
,
1370 dev
->mode_config
.max_height
);
1372 * we shouldn't end up with no modes here.
1375 printk(KERN_INFO
"No connectors reported connected with modes\n");
1377 drm_setup_crtcs(fb_helper
);
1379 return drm_fb_helper_single_fb_probe(fb_helper
, bpp_sel
);
1381 EXPORT_SYMBOL(drm_fb_helper_initial_config
);
1384 * drm_fb_helper_hotplug_event - respond to a hotplug notification by
1385 * probing all the outputs attached to the fb.
1386 * @fb_helper: the drm_fb_helper
1389 * Called at runtime, must take mode config lock.
1391 * Scan the connectors attached to the fb_helper and try to put together a
1392 * setup after *notification of a change in output configuration.
1395 * 0 on success and a non-zero error code otherwise.
1397 int drm_fb_helper_hotplug_event(struct drm_fb_helper
*fb_helper
)
1399 struct drm_device
*dev
= fb_helper
->dev
;
1401 u32 max_width
, max_height
, bpp_sel
;
1402 bool bound
= false, crtcs_bound
= false;
1403 struct drm_crtc
*crtc
;
1408 mutex_lock(&dev
->mode_config
.mutex
);
1409 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
1412 if (crtc
->fb
== fb_helper
->fb
)
1416 if (!bound
&& crtcs_bound
) {
1417 fb_helper
->delayed_hotplug
= true;
1418 mutex_unlock(&dev
->mode_config
.mutex
);
1421 DRM_DEBUG_KMS("\n");
1423 max_width
= fb_helper
->fb
->width
;
1424 max_height
= fb_helper
->fb
->height
;
1425 bpp_sel
= fb_helper
->fb
->bits_per_pixel
;
1427 count
= drm_fb_helper_probe_connector_modes(fb_helper
, max_width
,
1429 drm_setup_crtcs(fb_helper
);
1430 mutex_unlock(&dev
->mode_config
.mutex
);
1432 return drm_fb_helper_single_fb_probe(fb_helper
, bpp_sel
);
1434 EXPORT_SYMBOL(drm_fb_helper_hotplug_event
);
1436 /* The Kconfig DRM_KMS_HELPER selects FRAMEBUFFER_CONSOLE (if !EXPERT)
1437 * but the module doesn't depend on any fb console symbols. At least
1438 * attempt to load fbcon to avoid leaving the system without a usable console.
1440 #if defined(CONFIG_FRAMEBUFFER_CONSOLE_MODULE) && !defined(CONFIG_EXPERT)
1441 static int __init
drm_fb_helper_modinit(void)
1443 const char *name
= "fbcon";
1444 struct module
*fbcon
;
1446 mutex_lock(&module_mutex
);
1447 fbcon
= find_module(name
);
1448 mutex_unlock(&module_mutex
);
1451 request_module_nowait(name
);
1455 module_init(drm_fb_helper_modinit
);