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_dpms(struct fb_info
*info
, int dpms_mode
)
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_connector
*connector
;
318 * For each CRTC in this fb, turn the connectors on/off.
320 mutex_lock(&dev
->mode_config
.mutex
);
321 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
322 crtc
= fb_helper
->crtc_info
[i
].mode_set
.crtc
;
327 /* Walk the connectors & encoders on this fb turning them on/off */
328 for (j
= 0; j
< fb_helper
->connector_count
; j
++) {
329 connector
= fb_helper
->connector_info
[j
]->connector
;
330 drm_helper_connector_dpms(connector
, dpms_mode
);
331 drm_connector_property_set_value(connector
,
332 dev
->mode_config
.dpms_property
, dpms_mode
);
335 mutex_unlock(&dev
->mode_config
.mutex
);
338 int drm_fb_helper_blank(int blank
, struct fb_info
*info
)
341 /* Display: On; HSync: On, VSync: On */
342 case FB_BLANK_UNBLANK
:
343 drm_fb_helper_dpms(info
, DRM_MODE_DPMS_ON
);
345 /* Display: Off; HSync: On, VSync: On */
346 case FB_BLANK_NORMAL
:
347 drm_fb_helper_dpms(info
, DRM_MODE_DPMS_STANDBY
);
349 /* Display: Off; HSync: Off, VSync: On */
350 case FB_BLANK_HSYNC_SUSPEND
:
351 drm_fb_helper_dpms(info
, DRM_MODE_DPMS_STANDBY
);
353 /* Display: Off; HSync: On, VSync: Off */
354 case FB_BLANK_VSYNC_SUSPEND
:
355 drm_fb_helper_dpms(info
, DRM_MODE_DPMS_SUSPEND
);
357 /* Display: Off; HSync: Off, VSync: Off */
358 case FB_BLANK_POWERDOWN
:
359 drm_fb_helper_dpms(info
, DRM_MODE_DPMS_OFF
);
364 EXPORT_SYMBOL(drm_fb_helper_blank
);
366 static void drm_fb_helper_crtc_free(struct drm_fb_helper
*helper
)
370 for (i
= 0; i
< helper
->connector_count
; i
++)
371 kfree(helper
->connector_info
[i
]);
372 kfree(helper
->connector_info
);
373 for (i
= 0; i
< helper
->crtc_count
; i
++) {
374 kfree(helper
->crtc_info
[i
].mode_set
.connectors
);
375 if (helper
->crtc_info
[i
].mode_set
.mode
)
376 drm_mode_destroy(helper
->dev
, helper
->crtc_info
[i
].mode_set
.mode
);
378 kfree(helper
->crtc_info
);
381 int drm_fb_helper_init(struct drm_device
*dev
,
382 struct drm_fb_helper
*fb_helper
,
383 int crtc_count
, int max_conn_count
)
385 struct drm_crtc
*crtc
;
389 fb_helper
->dev
= dev
;
391 INIT_LIST_HEAD(&fb_helper
->kernel_fb_list
);
393 fb_helper
->crtc_info
= kcalloc(crtc_count
, sizeof(struct drm_fb_helper_crtc
), GFP_KERNEL
);
394 if (!fb_helper
->crtc_info
)
397 fb_helper
->crtc_count
= crtc_count
;
398 fb_helper
->connector_info
= kcalloc(dev
->mode_config
.num_connector
, sizeof(struct drm_fb_helper_connector
*), GFP_KERNEL
);
399 if (!fb_helper
->connector_info
) {
400 kfree(fb_helper
->crtc_info
);
403 fb_helper
->connector_count
= 0;
405 for (i
= 0; i
< crtc_count
; i
++) {
406 fb_helper
->crtc_info
[i
].mode_set
.connectors
=
407 kcalloc(max_conn_count
,
408 sizeof(struct drm_connector
*),
411 if (!fb_helper
->crtc_info
[i
].mode_set
.connectors
) {
415 fb_helper
->crtc_info
[i
].mode_set
.num_connectors
= 0;
419 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
420 fb_helper
->crtc_info
[i
].mode_set
.crtc
= crtc
;
426 drm_fb_helper_crtc_free(fb_helper
);
429 EXPORT_SYMBOL(drm_fb_helper_init
);
431 void drm_fb_helper_fini(struct drm_fb_helper
*fb_helper
)
433 if (!list_empty(&fb_helper
->kernel_fb_list
)) {
434 list_del(&fb_helper
->kernel_fb_list
);
435 if (list_empty(&kernel_fb_helper_list
)) {
436 printk(KERN_INFO
"drm: unregistered panic notifier\n");
437 atomic_notifier_chain_unregister(&panic_notifier_list
,
439 unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op
);
443 drm_fb_helper_crtc_free(fb_helper
);
446 EXPORT_SYMBOL(drm_fb_helper_fini
);
448 static int setcolreg(struct drm_crtc
*crtc
, u16 red
, u16 green
,
449 u16 blue
, u16 regno
, struct fb_info
*info
)
451 struct drm_fb_helper
*fb_helper
= info
->par
;
452 struct drm_framebuffer
*fb
= fb_helper
->fb
;
455 if (info
->fix
.visual
== FB_VISUAL_TRUECOLOR
) {
458 /* place color in psuedopalette */
461 palette
= (u32
*)info
->pseudo_palette
;
462 red
>>= (16 - info
->var
.red
.length
);
463 green
>>= (16 - info
->var
.green
.length
);
464 blue
>>= (16 - info
->var
.blue
.length
);
465 value
= (red
<< info
->var
.red
.offset
) |
466 (green
<< info
->var
.green
.offset
) |
467 (blue
<< info
->var
.blue
.offset
);
468 if (info
->var
.transp
.length
> 0) {
469 u32 mask
= (1 << info
->var
.transp
.length
) - 1;
470 mask
<<= info
->var
.transp
.offset
;
473 palette
[regno
] = value
;
479 if (fb
->bits_per_pixel
== 16) {
482 if (fb
->depth
== 16 && regno
> 63)
484 if (fb
->depth
== 15 && regno
> 31)
487 if (fb
->depth
== 16) {
491 for (i
= 0; i
< 8; i
++)
492 fb_helper
->funcs
->gamma_set(crtc
, red
,
493 green
, blue
, pindex
+ i
);
496 fb_helper
->funcs
->gamma_get(crtc
, &r
,
500 for (i
= 0; i
< 4; i
++)
501 fb_helper
->funcs
->gamma_set(crtc
, r
,
508 fb_helper
->funcs
->gamma_set(crtc
, red
, green
, blue
, pindex
);
512 int drm_fb_helper_setcmap(struct fb_cmap
*cmap
, struct fb_info
*info
)
514 struct drm_fb_helper
*fb_helper
= info
->par
;
515 struct drm_crtc_helper_funcs
*crtc_funcs
;
516 u16
*red
, *green
, *blue
, *transp
;
517 struct drm_crtc
*crtc
;
521 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
522 crtc
= fb_helper
->crtc_info
[i
].mode_set
.crtc
;
523 crtc_funcs
= crtc
->helper_private
;
528 transp
= cmap
->transp
;
531 for (j
= 0; j
< cmap
->len
; j
++) {
532 u16 hred
, hgreen
, hblue
, htransp
= 0xffff;
541 rc
= setcolreg(crtc
, hred
, hgreen
, hblue
, start
++, info
);
545 crtc_funcs
->load_lut(crtc
);
549 EXPORT_SYMBOL(drm_fb_helper_setcmap
);
551 int drm_fb_helper_check_var(struct fb_var_screeninfo
*var
,
552 struct fb_info
*info
)
554 struct drm_fb_helper
*fb_helper
= info
->par
;
555 struct drm_framebuffer
*fb
= fb_helper
->fb
;
558 if (var
->pixclock
!= 0 || in_dbg_master())
561 /* Need to resize the fb object !!! */
562 if (var
->bits_per_pixel
> fb
->bits_per_pixel
|| var
->xres
> fb
->width
|| var
->yres
> fb
->height
) {
563 DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb "
564 "object %dx%d-%d > %dx%d-%d\n", var
->xres
, var
->yres
, var
->bits_per_pixel
,
565 fb
->width
, fb
->height
, fb
->bits_per_pixel
);
569 switch (var
->bits_per_pixel
) {
571 depth
= (var
->green
.length
== 6) ? 16 : 15;
574 depth
= (var
->transp
.length
> 0) ? 32 : 24;
577 depth
= var
->bits_per_pixel
;
584 var
->green
.offset
= 0;
585 var
->blue
.offset
= 0;
587 var
->green
.length
= 8;
588 var
->blue
.length
= 8;
589 var
->transp
.length
= 0;
590 var
->transp
.offset
= 0;
593 var
->red
.offset
= 10;
594 var
->green
.offset
= 5;
595 var
->blue
.offset
= 0;
597 var
->green
.length
= 5;
598 var
->blue
.length
= 5;
599 var
->transp
.length
= 1;
600 var
->transp
.offset
= 15;
603 var
->red
.offset
= 11;
604 var
->green
.offset
= 5;
605 var
->blue
.offset
= 0;
607 var
->green
.length
= 6;
608 var
->blue
.length
= 5;
609 var
->transp
.length
= 0;
610 var
->transp
.offset
= 0;
613 var
->red
.offset
= 16;
614 var
->green
.offset
= 8;
615 var
->blue
.offset
= 0;
617 var
->green
.length
= 8;
618 var
->blue
.length
= 8;
619 var
->transp
.length
= 0;
620 var
->transp
.offset
= 0;
623 var
->red
.offset
= 16;
624 var
->green
.offset
= 8;
625 var
->blue
.offset
= 0;
627 var
->green
.length
= 8;
628 var
->blue
.length
= 8;
629 var
->transp
.length
= 8;
630 var
->transp
.offset
= 24;
637 EXPORT_SYMBOL(drm_fb_helper_check_var
);
639 /* this will let fbcon do the mode init */
640 int drm_fb_helper_set_par(struct fb_info
*info
)
642 struct drm_fb_helper
*fb_helper
= info
->par
;
643 struct drm_device
*dev
= fb_helper
->dev
;
644 struct fb_var_screeninfo
*var
= &info
->var
;
645 struct drm_crtc
*crtc
;
649 if (var
->pixclock
!= 0) {
650 DRM_ERROR("PIXEL CLOCK SET\n");
654 mutex_lock(&dev
->mode_config
.mutex
);
655 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
656 crtc
= fb_helper
->crtc_info
[i
].mode_set
.crtc
;
657 ret
= crtc
->funcs
->set_config(&fb_helper
->crtc_info
[i
].mode_set
);
659 mutex_unlock(&dev
->mode_config
.mutex
);
663 mutex_unlock(&dev
->mode_config
.mutex
);
665 if (fb_helper
->delayed_hotplug
) {
666 fb_helper
->delayed_hotplug
= false;
667 drm_fb_helper_hotplug_event(fb_helper
);
671 EXPORT_SYMBOL(drm_fb_helper_set_par
);
673 int drm_fb_helper_pan_display(struct fb_var_screeninfo
*var
,
674 struct fb_info
*info
)
676 struct drm_fb_helper
*fb_helper
= info
->par
;
677 struct drm_device
*dev
= fb_helper
->dev
;
678 struct drm_mode_set
*modeset
;
679 struct drm_crtc
*crtc
;
683 mutex_lock(&dev
->mode_config
.mutex
);
684 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
685 crtc
= fb_helper
->crtc_info
[i
].mode_set
.crtc
;
687 modeset
= &fb_helper
->crtc_info
[i
].mode_set
;
689 modeset
->x
= var
->xoffset
;
690 modeset
->y
= var
->yoffset
;
692 if (modeset
->num_connectors
) {
693 ret
= crtc
->funcs
->set_config(modeset
);
695 info
->var
.xoffset
= var
->xoffset
;
696 info
->var
.yoffset
= var
->yoffset
;
700 mutex_unlock(&dev
->mode_config
.mutex
);
703 EXPORT_SYMBOL(drm_fb_helper_pan_display
);
705 int drm_fb_helper_single_fb_probe(struct drm_fb_helper
*fb_helper
,
711 struct fb_info
*info
;
712 struct drm_fb_helper_surface_size sizes
;
715 memset(&sizes
, 0, sizeof(struct drm_fb_helper_surface_size
));
716 sizes
.surface_depth
= 24;
717 sizes
.surface_bpp
= 32;
718 sizes
.fb_width
= (unsigned)-1;
719 sizes
.fb_height
= (unsigned)-1;
721 /* if driver picks 8 or 16 by default use that
722 for both depth/bpp */
723 if (preferred_bpp
!= sizes
.surface_bpp
) {
724 sizes
.surface_depth
= sizes
.surface_bpp
= preferred_bpp
;
726 /* first up get a count of crtcs now in use and new min/maxes width/heights */
727 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
728 struct drm_fb_helper_connector
*fb_helper_conn
= fb_helper
->connector_info
[i
];
729 struct drm_cmdline_mode
*cmdline_mode
;
731 cmdline_mode
= &fb_helper_conn
->cmdline_mode
;
733 if (cmdline_mode
->bpp_specified
) {
734 switch (cmdline_mode
->bpp
) {
736 sizes
.surface_depth
= sizes
.surface_bpp
= 8;
739 sizes
.surface_depth
= 15;
740 sizes
.surface_bpp
= 16;
743 sizes
.surface_depth
= sizes
.surface_bpp
= 16;
746 sizes
.surface_depth
= sizes
.surface_bpp
= 24;
749 sizes
.surface_depth
= 24;
750 sizes
.surface_bpp
= 32;
758 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
759 struct drm_display_mode
*desired_mode
;
760 desired_mode
= fb_helper
->crtc_info
[i
].desired_mode
;
764 gamma_size
= fb_helper
->crtc_info
[i
].mode_set
.crtc
->gamma_size
;
765 if (desired_mode
->hdisplay
< sizes
.fb_width
)
766 sizes
.fb_width
= desired_mode
->hdisplay
;
767 if (desired_mode
->vdisplay
< sizes
.fb_height
)
768 sizes
.fb_height
= desired_mode
->vdisplay
;
769 if (desired_mode
->hdisplay
> sizes
.surface_width
)
770 sizes
.surface_width
= desired_mode
->hdisplay
;
771 if (desired_mode
->vdisplay
> sizes
.surface_height
)
772 sizes
.surface_height
= desired_mode
->vdisplay
;
777 if (crtc_count
== 0 || sizes
.fb_width
== -1 || sizes
.fb_height
== -1) {
778 /* hmm everyone went away - assume VGA cable just fell out
779 and will come back later. */
780 DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n");
781 sizes
.fb_width
= sizes
.surface_width
= 1024;
782 sizes
.fb_height
= sizes
.surface_height
= 768;
785 /* push down into drivers */
786 new_fb
= (*fb_helper
->funcs
->fb_probe
)(fb_helper
, &sizes
);
790 info
= fb_helper
->fbdev
;
792 /* set the fb pointer */
793 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
794 fb_helper
->crtc_info
[i
].mode_set
.fb
= fb_helper
->fb
;
798 info
->var
.pixclock
= 0;
799 if (register_framebuffer(info
) < 0) {
803 printk(KERN_INFO
"fb%d: %s frame buffer device\n", info
->node
,
807 drm_fb_helper_set_par(info
);
810 /* Switch back to kernel console on panic */
811 /* multi card linked list maybe */
812 if (list_empty(&kernel_fb_helper_list
)) {
813 printk(KERN_INFO
"drm: registered panic notifier\n");
814 atomic_notifier_chain_register(&panic_notifier_list
,
816 register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op
);
819 list_add(&fb_helper
->kernel_fb_list
, &kernel_fb_helper_list
);
823 EXPORT_SYMBOL(drm_fb_helper_single_fb_probe
);
825 void drm_fb_helper_fill_fix(struct fb_info
*info
, uint32_t pitch
,
828 info
->fix
.type
= FB_TYPE_PACKED_PIXELS
;
829 info
->fix
.visual
= depth
== 8 ? FB_VISUAL_PSEUDOCOLOR
:
831 info
->fix
.mmio_start
= 0;
832 info
->fix
.mmio_len
= 0;
833 info
->fix
.type_aux
= 0;
834 info
->fix
.xpanstep
= 1; /* doing it in hw */
835 info
->fix
.ypanstep
= 1; /* doing it in hw */
836 info
->fix
.ywrapstep
= 0;
837 info
->fix
.accel
= FB_ACCEL_NONE
;
838 info
->fix
.type_aux
= 0;
840 info
->fix
.line_length
= pitch
;
843 EXPORT_SYMBOL(drm_fb_helper_fill_fix
);
845 void drm_fb_helper_fill_var(struct fb_info
*info
, struct drm_fb_helper
*fb_helper
,
846 uint32_t fb_width
, uint32_t fb_height
)
848 struct drm_framebuffer
*fb
= fb_helper
->fb
;
849 info
->pseudo_palette
= fb_helper
->pseudo_palette
;
850 info
->var
.xres_virtual
= fb
->width
;
851 info
->var
.yres_virtual
= fb
->height
;
852 info
->var
.bits_per_pixel
= fb
->bits_per_pixel
;
853 info
->var
.accel_flags
= FB_ACCELF_TEXT
;
854 info
->var
.xoffset
= 0;
855 info
->var
.yoffset
= 0;
856 info
->var
.activate
= FB_ACTIVATE_NOW
;
857 info
->var
.height
= -1;
858 info
->var
.width
= -1;
862 info
->var
.red
.offset
= 0;
863 info
->var
.green
.offset
= 0;
864 info
->var
.blue
.offset
= 0;
865 info
->var
.red
.length
= 8; /* 8bit DAC */
866 info
->var
.green
.length
= 8;
867 info
->var
.blue
.length
= 8;
868 info
->var
.transp
.offset
= 0;
869 info
->var
.transp
.length
= 0;
872 info
->var
.red
.offset
= 10;
873 info
->var
.green
.offset
= 5;
874 info
->var
.blue
.offset
= 0;
875 info
->var
.red
.length
= 5;
876 info
->var
.green
.length
= 5;
877 info
->var
.blue
.length
= 5;
878 info
->var
.transp
.offset
= 15;
879 info
->var
.transp
.length
= 1;
882 info
->var
.red
.offset
= 11;
883 info
->var
.green
.offset
= 5;
884 info
->var
.blue
.offset
= 0;
885 info
->var
.red
.length
= 5;
886 info
->var
.green
.length
= 6;
887 info
->var
.blue
.length
= 5;
888 info
->var
.transp
.offset
= 0;
891 info
->var
.red
.offset
= 16;
892 info
->var
.green
.offset
= 8;
893 info
->var
.blue
.offset
= 0;
894 info
->var
.red
.length
= 8;
895 info
->var
.green
.length
= 8;
896 info
->var
.blue
.length
= 8;
897 info
->var
.transp
.offset
= 0;
898 info
->var
.transp
.length
= 0;
901 info
->var
.red
.offset
= 16;
902 info
->var
.green
.offset
= 8;
903 info
->var
.blue
.offset
= 0;
904 info
->var
.red
.length
= 8;
905 info
->var
.green
.length
= 8;
906 info
->var
.blue
.length
= 8;
907 info
->var
.transp
.offset
= 24;
908 info
->var
.transp
.length
= 8;
914 info
->var
.xres
= fb_width
;
915 info
->var
.yres
= fb_height
;
917 EXPORT_SYMBOL(drm_fb_helper_fill_var
);
919 static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper
*fb_helper
,
923 struct drm_connector
*connector
;
927 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
928 connector
= fb_helper
->connector_info
[i
]->connector
;
929 count
+= connector
->funcs
->fill_modes(connector
, maxX
, maxY
);
935 static struct drm_display_mode
*drm_has_preferred_mode(struct drm_fb_helper_connector
*fb_connector
, int width
, int height
)
937 struct drm_display_mode
*mode
;
939 list_for_each_entry(mode
, &fb_connector
->connector
->modes
, head
) {
940 if (drm_mode_width(mode
) > width
||
941 drm_mode_height(mode
) > height
)
943 if (mode
->type
& DRM_MODE_TYPE_PREFERRED
)
949 static bool drm_has_cmdline_mode(struct drm_fb_helper_connector
*fb_connector
)
951 struct drm_cmdline_mode
*cmdline_mode
;
952 cmdline_mode
= &fb_connector
->cmdline_mode
;
953 return cmdline_mode
->specified
;
956 static struct drm_display_mode
*drm_pick_cmdline_mode(struct drm_fb_helper_connector
*fb_helper_conn
,
957 int width
, int height
)
959 struct drm_cmdline_mode
*cmdline_mode
;
960 struct drm_display_mode
*mode
= NULL
;
962 cmdline_mode
= &fb_helper_conn
->cmdline_mode
;
963 if (cmdline_mode
->specified
== false)
966 /* attempt to find a matching mode in the list of modes
967 * we have gotten so far, if not add a CVT mode that conforms
969 if (cmdline_mode
->rb
|| cmdline_mode
->margins
)
972 list_for_each_entry(mode
, &fb_helper_conn
->connector
->modes
, head
) {
973 /* check width/height */
974 if (mode
->hdisplay
!= cmdline_mode
->xres
||
975 mode
->vdisplay
!= cmdline_mode
->yres
)
978 if (cmdline_mode
->refresh_specified
) {
979 if (mode
->vrefresh
!= cmdline_mode
->refresh
)
983 if (cmdline_mode
->interlace
) {
984 if (!(mode
->flags
& DRM_MODE_FLAG_INTERLACE
))
991 mode
= drm_mode_create_from_cmdline_mode(fb_helper_conn
->connector
->dev
,
993 list_add(&mode
->head
, &fb_helper_conn
->connector
->modes
);
997 static bool drm_connector_enabled(struct drm_connector
*connector
, bool strict
)
1002 enable
= connector
->status
== connector_status_connected
;
1004 enable
= connector
->status
!= connector_status_disconnected
;
1009 static void drm_enable_connectors(struct drm_fb_helper
*fb_helper
,
1012 bool any_enabled
= false;
1013 struct drm_connector
*connector
;
1016 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
1017 connector
= fb_helper
->connector_info
[i
]->connector
;
1018 enabled
[i
] = drm_connector_enabled(connector
, true);
1019 DRM_DEBUG_KMS("connector %d enabled? %s\n", connector
->base
.id
,
1020 enabled
[i
] ? "yes" : "no");
1021 any_enabled
|= enabled
[i
];
1027 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
1028 connector
= fb_helper
->connector_info
[i
]->connector
;
1029 enabled
[i
] = drm_connector_enabled(connector
, false);
1033 static bool drm_target_cloned(struct drm_fb_helper
*fb_helper
,
1034 struct drm_display_mode
**modes
,
1035 bool *enabled
, int width
, int height
)
1038 bool can_clone
= false;
1039 struct drm_fb_helper_connector
*fb_helper_conn
;
1040 struct drm_display_mode
*dmt_mode
, *mode
;
1042 /* only contemplate cloning in the single crtc case */
1043 if (fb_helper
->crtc_count
> 1)
1047 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
1052 /* only contemplate cloning if more than one connector is enabled */
1056 /* check the command line or if nothing common pick 1024x768 */
1058 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
1061 fb_helper_conn
= fb_helper
->connector_info
[i
];
1062 modes
[i
] = drm_pick_cmdline_mode(fb_helper_conn
, width
, height
);
1067 for (j
= 0; j
< i
; j
++) {
1070 if (!drm_mode_equal(modes
[j
], modes
[i
]))
1076 DRM_DEBUG_KMS("can clone using command line\n");
1080 /* try and find a 1024x768 mode on each connector */
1082 dmt_mode
= drm_mode_find_dmt(fb_helper
->dev
, 1024, 768, 60);
1084 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
1089 fb_helper_conn
= fb_helper
->connector_info
[i
];
1090 list_for_each_entry(mode
, &fb_helper_conn
->connector
->modes
, head
) {
1091 if (drm_mode_equal(mode
, dmt_mode
))
1099 DRM_DEBUG_KMS("can clone using 1024x768\n");
1102 DRM_INFO("kms: can't enable cloning when we probably wanted to.\n");
1106 static bool drm_target_preferred(struct drm_fb_helper
*fb_helper
,
1107 struct drm_display_mode
**modes
,
1108 bool *enabled
, int width
, int height
)
1110 struct drm_fb_helper_connector
*fb_helper_conn
;
1113 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
1114 fb_helper_conn
= fb_helper
->connector_info
[i
];
1116 if (enabled
[i
] == false)
1119 DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n",
1120 fb_helper_conn
->connector
->base
.id
);
1122 /* got for command line mode first */
1123 modes
[i
] = drm_pick_cmdline_mode(fb_helper_conn
, width
, height
);
1125 DRM_DEBUG_KMS("looking for preferred mode on connector %d\n",
1126 fb_helper_conn
->connector
->base
.id
);
1127 modes
[i
] = drm_has_preferred_mode(fb_helper_conn
, width
, height
);
1129 /* No preferred modes, pick one off the list */
1130 if (!modes
[i
] && !list_empty(&fb_helper_conn
->connector
->modes
)) {
1131 list_for_each_entry(modes
[i
], &fb_helper_conn
->connector
->modes
, head
)
1134 DRM_DEBUG_KMS("found mode %s\n", modes
[i
] ? modes
[i
]->name
:
1140 static int drm_pick_crtcs(struct drm_fb_helper
*fb_helper
,
1141 struct drm_fb_helper_crtc
**best_crtcs
,
1142 struct drm_display_mode
**modes
,
1143 int n
, int width
, int height
)
1146 struct drm_device
*dev
= fb_helper
->dev
;
1147 struct drm_connector
*connector
;
1148 struct drm_connector_helper_funcs
*connector_funcs
;
1149 struct drm_encoder
*encoder
;
1150 struct drm_fb_helper_crtc
*best_crtc
;
1151 int my_score
, best_score
, score
;
1152 struct drm_fb_helper_crtc
**crtcs
, *crtc
;
1153 struct drm_fb_helper_connector
*fb_helper_conn
;
1155 if (n
== fb_helper
->connector_count
)
1158 fb_helper_conn
= fb_helper
->connector_info
[n
];
1159 connector
= fb_helper_conn
->connector
;
1161 best_crtcs
[n
] = NULL
;
1163 best_score
= drm_pick_crtcs(fb_helper
, best_crtcs
, modes
, n
+1, width
, height
);
1164 if (modes
[n
] == NULL
)
1167 crtcs
= kzalloc(dev
->mode_config
.num_connector
*
1168 sizeof(struct drm_fb_helper_crtc
*), GFP_KERNEL
);
1173 if (connector
->status
== connector_status_connected
)
1175 if (drm_has_cmdline_mode(fb_helper_conn
))
1177 if (drm_has_preferred_mode(fb_helper_conn
, width
, height
))
1180 connector_funcs
= connector
->helper_private
;
1181 encoder
= connector_funcs
->best_encoder(connector
);
1185 /* select a crtc for this connector and then attempt to configure
1186 remaining connectors */
1187 for (c
= 0; c
< fb_helper
->crtc_count
; c
++) {
1188 crtc
= &fb_helper
->crtc_info
[c
];
1190 if ((encoder
->possible_crtcs
& (1 << c
)) == 0) {
1194 for (o
= 0; o
< n
; o
++)
1195 if (best_crtcs
[o
] == crtc
)
1199 /* ignore cloning unless only a single crtc */
1200 if (fb_helper
->crtc_count
> 1)
1203 if (!drm_mode_equal(modes
[o
], modes
[n
]))
1208 memcpy(crtcs
, best_crtcs
, n
* sizeof(struct drm_fb_helper_crtc
*));
1209 score
= my_score
+ drm_pick_crtcs(fb_helper
, crtcs
, modes
, n
+ 1,
1211 if (score
> best_score
) {
1214 memcpy(best_crtcs
, crtcs
,
1215 dev
->mode_config
.num_connector
*
1216 sizeof(struct drm_fb_helper_crtc
*));
1224 static void drm_setup_crtcs(struct drm_fb_helper
*fb_helper
)
1226 struct drm_device
*dev
= fb_helper
->dev
;
1227 struct drm_fb_helper_crtc
**crtcs
;
1228 struct drm_display_mode
**modes
;
1229 struct drm_encoder
*encoder
;
1230 struct drm_mode_set
*modeset
;
1235 DRM_DEBUG_KMS("\n");
1237 width
= dev
->mode_config
.max_width
;
1238 height
= dev
->mode_config
.max_height
;
1240 /* clean out all the encoder/crtc combos */
1241 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
1242 encoder
->crtc
= NULL
;
1245 crtcs
= kcalloc(dev
->mode_config
.num_connector
,
1246 sizeof(struct drm_fb_helper_crtc
*), GFP_KERNEL
);
1247 modes
= kcalloc(dev
->mode_config
.num_connector
,
1248 sizeof(struct drm_display_mode
*), GFP_KERNEL
);
1249 enabled
= kcalloc(dev
->mode_config
.num_connector
,
1250 sizeof(bool), GFP_KERNEL
);
1252 drm_enable_connectors(fb_helper
, enabled
);
1254 ret
= drm_target_cloned(fb_helper
, modes
, enabled
, width
, height
);
1256 ret
= drm_target_preferred(fb_helper
, modes
, enabled
, width
, height
);
1258 DRM_ERROR("Unable to find initial modes\n");
1261 DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width
, height
);
1263 drm_pick_crtcs(fb_helper
, crtcs
, modes
, 0, width
, height
);
1265 /* need to set the modesets up here for use later */
1266 /* fill out the connector<->crtc mappings into the modesets */
1267 for (i
= 0; i
< fb_helper
->crtc_count
; i
++) {
1268 modeset
= &fb_helper
->crtc_info
[i
].mode_set
;
1269 modeset
->num_connectors
= 0;
1272 for (i
= 0; i
< fb_helper
->connector_count
; i
++) {
1273 struct drm_display_mode
*mode
= modes
[i
];
1274 struct drm_fb_helper_crtc
*fb_crtc
= crtcs
[i
];
1275 modeset
= &fb_crtc
->mode_set
;
1277 if (mode
&& fb_crtc
) {
1278 DRM_DEBUG_KMS("desired mode %s set on crtc %d\n",
1279 mode
->name
, fb_crtc
->mode_set
.crtc
->base
.id
);
1280 fb_crtc
->desired_mode
= mode
;
1282 drm_mode_destroy(dev
, modeset
->mode
);
1283 modeset
->mode
= drm_mode_duplicate(dev
,
1284 fb_crtc
->desired_mode
);
1285 modeset
->connectors
[modeset
->num_connectors
++] = fb_helper
->connector_info
[i
]->connector
;
1295 * drm_helper_initial_config - setup a sane initial connector configuration
1299 * Called at init time, must take mode config lock.
1301 * Scan the CRTCs and connectors and try to put together an initial setup.
1302 * At the moment, this is a cloned configuration across all heads with
1303 * a new framebuffer object as the backing store.
1306 * Zero if everything went ok, nonzero otherwise.
1308 bool drm_fb_helper_initial_config(struct drm_fb_helper
*fb_helper
, int bpp_sel
)
1310 struct drm_device
*dev
= fb_helper
->dev
;
1313 /* disable all the possible outputs/crtcs before entering KMS mode */
1314 drm_helper_disable_unused_functions(fb_helper
->dev
);
1316 drm_fb_helper_parse_command_line(fb_helper
);
1318 count
= drm_fb_helper_probe_connector_modes(fb_helper
,
1319 dev
->mode_config
.max_width
,
1320 dev
->mode_config
.max_height
);
1322 * we shouldn't end up with no modes here.
1325 printk(KERN_INFO
"No connectors reported connected with modes\n");
1327 drm_setup_crtcs(fb_helper
);
1329 return drm_fb_helper_single_fb_probe(fb_helper
, bpp_sel
);
1331 EXPORT_SYMBOL(drm_fb_helper_initial_config
);
1334 * drm_fb_helper_hotplug_event - respond to a hotplug notification by
1335 * probing all the outputs attached to the fb.
1336 * @fb_helper: the drm_fb_helper
1339 * Called at runtime, must take mode config lock.
1341 * Scan the connectors attached to the fb_helper and try to put together a
1342 * setup after *notification of a change in output configuration.
1345 * 0 on success and a non-zero error code otherwise.
1347 int drm_fb_helper_hotplug_event(struct drm_fb_helper
*fb_helper
)
1349 struct drm_device
*dev
= fb_helper
->dev
;
1351 u32 max_width
, max_height
, bpp_sel
;
1352 bool bound
= false, crtcs_bound
= false;
1353 struct drm_crtc
*crtc
;
1358 mutex_lock(&dev
->mode_config
.mutex
);
1359 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
1362 if (crtc
->fb
== fb_helper
->fb
)
1366 if (!bound
&& crtcs_bound
) {
1367 fb_helper
->delayed_hotplug
= true;
1368 mutex_unlock(&dev
->mode_config
.mutex
);
1371 DRM_DEBUG_KMS("\n");
1373 max_width
= fb_helper
->fb
->width
;
1374 max_height
= fb_helper
->fb
->height
;
1375 bpp_sel
= fb_helper
->fb
->bits_per_pixel
;
1377 count
= drm_fb_helper_probe_connector_modes(fb_helper
, max_width
,
1379 drm_setup_crtcs(fb_helper
);
1380 mutex_unlock(&dev
->mode_config
.mutex
);
1382 return drm_fb_helper_single_fb_probe(fb_helper
, bpp_sel
);
1384 EXPORT_SYMBOL(drm_fb_helper_hotplug_event
);
1386 /* The Kconfig DRM_KMS_HELPER selects FRAMEBUFFER_CONSOLE (if !EXPERT)
1387 * but the module doesn't depend on any fb console symbols. At least
1388 * attempt to load fbcon to avoid leaving the system without a usable console.
1390 #if defined(CONFIG_FRAMEBUFFER_CONSOLE_MODULE) && !defined(CONFIG_EXPERT)
1391 static int __init
drm_fb_helper_modinit(void)
1393 const char *name
= "fbcon";
1394 struct module
*fbcon
;
1396 mutex_lock(&module_mutex
);
1397 fbcon
= find_module(name
);
1398 mutex_unlock(&module_mutex
);
1401 request_module_nowait(name
);
1405 module_init(drm_fb_helper_modinit
);