2 * Copyright © 2007 David Airlie
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
27 #include <linux/async.h>
28 #include <linux/module.h>
29 #include <linux/kernel.h>
30 #include <linux/console.h>
31 #include <linux/errno.h>
32 #include <linux/string.h>
34 #include <linux/tty.h>
35 #include <linux/sysrq.h>
36 #include <linux/delay.h>
38 #include <linux/init.h>
39 #include <linux/vga_switcheroo.h>
42 #include <drm/drm_crtc.h>
43 #include <drm/drm_fb_helper.h>
44 #include "intel_drv.h"
45 #include <drm/i915_drm.h>
48 static int intel_fbdev_set_par(struct fb_info
*info
)
50 struct drm_fb_helper
*fb_helper
= info
->par
;
51 struct intel_fbdev
*ifbdev
=
52 container_of(fb_helper
, struct intel_fbdev
, helper
);
55 ret
= drm_fb_helper_set_par(info
);
58 mutex_lock(&fb_helper
->dev
->struct_mutex
);
59 intel_fb_obj_invalidate(ifbdev
->fb
->obj
, ORIGIN_GTT
);
60 mutex_unlock(&fb_helper
->dev
->struct_mutex
);
66 static int intel_fbdev_blank(int blank
, struct fb_info
*info
)
68 struct drm_fb_helper
*fb_helper
= info
->par
;
69 struct intel_fbdev
*ifbdev
=
70 container_of(fb_helper
, struct intel_fbdev
, helper
);
73 ret
= drm_fb_helper_blank(blank
, info
);
76 mutex_lock(&fb_helper
->dev
->struct_mutex
);
77 intel_fb_obj_invalidate(ifbdev
->fb
->obj
, ORIGIN_GTT
);
78 mutex_unlock(&fb_helper
->dev
->struct_mutex
);
84 static int intel_fbdev_pan_display(struct fb_var_screeninfo
*var
,
87 struct drm_fb_helper
*fb_helper
= info
->par
;
88 struct intel_fbdev
*ifbdev
=
89 container_of(fb_helper
, struct intel_fbdev
, helper
);
92 ret
= drm_fb_helper_pan_display(var
, info
);
95 mutex_lock(&fb_helper
->dev
->struct_mutex
);
96 intel_fb_obj_invalidate(ifbdev
->fb
->obj
, ORIGIN_GTT
);
97 mutex_unlock(&fb_helper
->dev
->struct_mutex
);
103 static struct fb_ops intelfb_ops
= {
104 .owner
= THIS_MODULE
,
105 .fb_check_var
= drm_fb_helper_check_var
,
106 .fb_set_par
= intel_fbdev_set_par
,
107 .fb_fillrect
= drm_fb_helper_cfb_fillrect
,
108 .fb_copyarea
= drm_fb_helper_cfb_copyarea
,
109 .fb_imageblit
= drm_fb_helper_cfb_imageblit
,
110 .fb_pan_display
= intel_fbdev_pan_display
,
111 .fb_blank
= intel_fbdev_blank
,
112 .fb_setcmap
= drm_fb_helper_setcmap
,
113 .fb_debug_enter
= drm_fb_helper_debug_enter
,
114 .fb_debug_leave
= drm_fb_helper_debug_leave
,
117 static int intelfb_alloc(struct drm_fb_helper
*helper
,
118 struct drm_fb_helper_surface_size
*sizes
)
120 struct intel_fbdev
*ifbdev
=
121 container_of(helper
, struct intel_fbdev
, helper
);
122 struct drm_framebuffer
*fb
;
123 struct drm_device
*dev
= helper
->dev
;
124 struct drm_i915_private
*dev_priv
= to_i915(dev
);
125 struct i915_ggtt
*ggtt
= &dev_priv
->ggtt
;
126 struct drm_mode_fb_cmd2 mode_cmd
= {};
127 struct drm_i915_gem_object
*obj
= NULL
;
130 /* we don't do packed 24bpp */
131 if (sizes
->surface_bpp
== 24)
132 sizes
->surface_bpp
= 32;
134 mode_cmd
.width
= sizes
->surface_width
;
135 mode_cmd
.height
= sizes
->surface_height
;
137 mode_cmd
.pitches
[0] = ALIGN(mode_cmd
.width
*
138 DIV_ROUND_UP(sizes
->surface_bpp
, 8), 64);
139 mode_cmd
.pixel_format
= drm_mode_legacy_fb_format(sizes
->surface_bpp
,
140 sizes
->surface_depth
);
142 mutex_lock(&dev
->struct_mutex
);
144 size
= mode_cmd
.pitches
[0] * mode_cmd
.height
;
145 size
= PAGE_ALIGN(size
);
147 /* If the FB is too big, just don't use it since fbdev is not very
148 * important and we should probably use that space with FBC or other
150 if (size
* 2 < ggtt
->stolen_usable_size
)
151 obj
= i915_gem_object_create_stolen(dev
, size
);
153 obj
= i915_gem_object_create(dev
, size
);
155 DRM_ERROR("failed to allocate framebuffer\n");
160 fb
= __intel_framebuffer_create(dev
, &mode_cmd
, obj
);
162 drm_gem_object_unreference(&obj
->base
);
167 mutex_unlock(&dev
->struct_mutex
);
169 ifbdev
->fb
= to_intel_framebuffer(fb
);
174 mutex_unlock(&dev
->struct_mutex
);
178 static int intelfb_create(struct drm_fb_helper
*helper
,
179 struct drm_fb_helper_surface_size
*sizes
)
181 struct intel_fbdev
*ifbdev
=
182 container_of(helper
, struct intel_fbdev
, helper
);
183 struct intel_framebuffer
*intel_fb
= ifbdev
->fb
;
184 struct drm_device
*dev
= helper
->dev
;
185 struct drm_i915_private
*dev_priv
= to_i915(dev
);
186 struct i915_ggtt
*ggtt
= &dev_priv
->ggtt
;
187 struct fb_info
*info
;
188 struct drm_framebuffer
*fb
;
189 struct i915_vma
*vma
;
190 struct drm_i915_gem_object
*obj
;
191 bool prealloc
= false;
196 (sizes
->fb_width
> intel_fb
->base
.width
||
197 sizes
->fb_height
> intel_fb
->base
.height
)) {
198 DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d),"
200 intel_fb
->base
.width
, intel_fb
->base
.height
,
201 sizes
->fb_width
, sizes
->fb_height
);
202 drm_framebuffer_unreference(&intel_fb
->base
);
203 intel_fb
= ifbdev
->fb
= NULL
;
205 if (!intel_fb
|| WARN_ON(!intel_fb
->obj
)) {
206 DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n");
207 ret
= intelfb_alloc(helper
, sizes
);
210 intel_fb
= ifbdev
->fb
;
212 DRM_DEBUG_KMS("re-using BIOS fb\n");
214 sizes
->fb_width
= intel_fb
->base
.width
;
215 sizes
->fb_height
= intel_fb
->base
.height
;
220 mutex_lock(&dev
->struct_mutex
);
222 /* Pin the GGTT vma for our access via info->screen_base.
223 * This also validates that any existing fb inherited from the
224 * BIOS is suitable for own access.
226 ret
= intel_pin_and_fence_fb_obj(&ifbdev
->fb
->base
, BIT(DRM_ROTATE_0
));
230 info
= drm_fb_helper_alloc_fbi(helper
);
232 DRM_ERROR("Failed to allocate fb_info\n");
239 fb
= &ifbdev
->fb
->base
;
241 ifbdev
->helper
.fb
= fb
;
243 strcpy(info
->fix
.id
, "inteldrmfb");
245 info
->flags
= FBINFO_DEFAULT
| FBINFO_CAN_FORCE_OUTPUT
;
246 info
->fbops
= &intelfb_ops
;
248 vma
= i915_gem_obj_to_ggtt(obj
);
250 /* setup aperture base/size for vesafb takeover */
251 info
->apertures
->ranges
[0].base
= dev
->mode_config
.fb_base
;
252 info
->apertures
->ranges
[0].size
= ggtt
->mappable_end
;
254 info
->fix
.smem_start
= dev
->mode_config
.fb_base
+ vma
->node
.start
;
255 info
->fix
.smem_len
= vma
->node
.size
;
257 vaddr
= i915_vma_pin_iomap(vma
);
259 DRM_ERROR("Failed to remap framebuffer into virtual memory\n");
260 ret
= PTR_ERR(vaddr
);
261 goto out_destroy_fbi
;
263 info
->screen_base
= vaddr
;
264 info
->screen_size
= vma
->node
.size
;
266 /* This driver doesn't need a VT switch to restore the mode on resume */
267 info
->skip_vt_switch
= true;
269 drm_fb_helper_fill_fix(info
, fb
->pitches
[0], fb
->depth
);
270 drm_fb_helper_fill_var(info
, &ifbdev
->helper
, sizes
->fb_width
, sizes
->fb_height
);
272 /* If the object is shmemfs backed, it will have given us zeroed pages.
273 * If the object is stolen however, it will be full of whatever
274 * garbage was left in there.
276 if (ifbdev
->fb
->obj
->stolen
&& !prealloc
)
277 memset_io(info
->screen_base
, 0, info
->screen_size
);
279 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
281 DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08llx, bo %p\n",
282 fb
->width
, fb
->height
,
283 i915_gem_obj_ggtt_offset(obj
), obj
);
285 mutex_unlock(&dev
->struct_mutex
);
286 vga_switcheroo_client_fb_set(dev
->pdev
, info
);
290 drm_fb_helper_release_fbi(helper
);
292 intel_unpin_fb_obj(&ifbdev
->fb
->base
, BIT(DRM_ROTATE_0
));
294 mutex_unlock(&dev
->struct_mutex
);
298 /** Sets the color ramps on behalf of RandR */
299 static void intel_crtc_fb_gamma_set(struct drm_crtc
*crtc
, u16 red
, u16 green
,
302 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
304 intel_crtc
->lut_r
[regno
] = red
>> 8;
305 intel_crtc
->lut_g
[regno
] = green
>> 8;
306 intel_crtc
->lut_b
[regno
] = blue
>> 8;
309 static void intel_crtc_fb_gamma_get(struct drm_crtc
*crtc
, u16
*red
, u16
*green
,
310 u16
*blue
, int regno
)
312 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
314 *red
= intel_crtc
->lut_r
[regno
] << 8;
315 *green
= intel_crtc
->lut_g
[regno
] << 8;
316 *blue
= intel_crtc
->lut_b
[regno
] << 8;
319 static struct drm_fb_helper_crtc
*
320 intel_fb_helper_crtc(struct drm_fb_helper
*fb_helper
, struct drm_crtc
*crtc
)
324 for (i
= 0; i
< fb_helper
->crtc_count
; i
++)
325 if (fb_helper
->crtc_info
[i
].mode_set
.crtc
== crtc
)
326 return &fb_helper
->crtc_info
[i
];
332 * Try to read the BIOS display configuration and use it for the initial
335 * The BIOS or boot loader will generally create an initial display
336 * configuration for us that includes some set of active pipes and displays.
337 * This routine tries to figure out which pipes and connectors are active
338 * and stuffs them into the crtcs and modes array given to us by the
339 * drm_fb_helper code.
341 * The overall sequence is:
342 * intel_fbdev_init - from driver load
343 * intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data
344 * drm_fb_helper_init - build fb helper structs
345 * drm_fb_helper_single_add_all_connectors - more fb helper structs
346 * intel_fbdev_initial_config - apply the config
347 * drm_fb_helper_initial_config - call ->probe then register_framebuffer()
348 * drm_setup_crtcs - build crtc config for fbdev
349 * intel_fb_initial_config - find active connectors etc
350 * drm_fb_helper_single_fb_probe - set up fbdev
351 * intelfb_create - re-use or alloc fb, build out fbdev structs
353 * Note that we don't make special consideration whether we could actually
354 * switch to the selected modes without a full modeset. E.g. when the display
355 * is in VGA mode we need to recalculate watermarks and set a new high-res
356 * framebuffer anyway.
358 static bool intel_fb_initial_config(struct drm_fb_helper
*fb_helper
,
359 struct drm_fb_helper_crtc
**crtcs
,
360 struct drm_display_mode
**modes
,
361 struct drm_fb_offset
*offsets
,
362 bool *enabled
, int width
, int height
)
364 struct drm_device
*dev
= fb_helper
->dev
;
365 unsigned long conn_configured
, mask
;
366 unsigned int count
= min(fb_helper
->connector_count
, BITS_PER_LONG
);
369 bool fallback
= true;
370 int num_connectors_enabled
= 0;
371 int num_connectors_detected
= 0;
374 save_enabled
= kcalloc(count
, sizeof(bool), GFP_KERNEL
);
378 memcpy(save_enabled
, enabled
, count
);
379 mask
= BIT(count
) - 1;
382 for (i
= 0; i
< count
; i
++) {
383 struct drm_fb_helper_connector
*fb_conn
;
384 struct drm_connector
*connector
;
385 struct drm_encoder
*encoder
;
386 struct drm_fb_helper_crtc
*new_crtc
;
387 struct intel_crtc
*intel_crtc
;
389 fb_conn
= fb_helper
->connector_info
[i
];
390 connector
= fb_conn
->connector
;
392 if (conn_configured
& BIT(i
))
395 if (pass
== 0 && !connector
->has_tile
)
398 if (connector
->status
== connector_status_connected
)
399 num_connectors_detected
++;
402 DRM_DEBUG_KMS("connector %s not enabled, skipping\n",
404 conn_configured
|= BIT(i
);
408 if (connector
->force
== DRM_FORCE_OFF
) {
409 DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n",
415 encoder
= connector
->state
->best_encoder
;
416 if (!encoder
|| WARN_ON(!connector
->state
->crtc
)) {
417 if (connector
->force
> DRM_FORCE_OFF
)
420 DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n",
423 conn_configured
|= BIT(i
);
427 num_connectors_enabled
++;
429 intel_crtc
= to_intel_crtc(connector
->state
->crtc
);
430 for (j
= 0; j
< 256; j
++) {
431 intel_crtc
->lut_r
[j
] = j
;
432 intel_crtc
->lut_g
[j
] = j
;
433 intel_crtc
->lut_b
[j
] = j
;
436 new_crtc
= intel_fb_helper_crtc(fb_helper
,
437 connector
->state
->crtc
);
440 * Make sure we're not trying to drive multiple connectors
441 * with a single CRTC, since our cloning support may not
444 for (j
= 0; j
< count
; j
++) {
445 if (crtcs
[j
] == new_crtc
) {
446 DRM_DEBUG_KMS("fallback: cloned configuration\n");
451 DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n",
454 /* go for command line mode first */
455 modes
[i
] = drm_pick_cmdline_mode(fb_conn
, width
, height
);
457 /* try for preferred next */
459 DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n",
460 connector
->name
, connector
->has_tile
);
461 modes
[i
] = drm_has_preferred_mode(fb_conn
, width
,
465 /* No preferred mode marked by the EDID? Are there any modes? */
466 if (!modes
[i
] && !list_empty(&connector
->modes
)) {
467 DRM_DEBUG_KMS("using first mode listed on connector %s\n",
469 modes
[i
] = list_first_entry(&connector
->modes
,
470 struct drm_display_mode
,
474 /* last resort: use current mode */
477 * IMPORTANT: We want to use the adjusted mode (i.e.
478 * after the panel fitter upscaling) as the initial
479 * config, not the input mode, which is what crtc->mode
480 * usually contains. But since our current
481 * code puts a mode derived from the post-pfit timings
482 * into crtc->mode this works out correctly.
484 * This is crtc->mode and not crtc->state->mode for the
485 * fastboot check to work correctly. crtc_state->mode has
486 * I915_MODE_FLAG_INHERITED, which we clear to force check
489 DRM_DEBUG_KMS("looking for current mode on connector %s\n",
491 modes
[i
] = &connector
->state
->crtc
->mode
;
495 DRM_DEBUG_KMS("connector %s on [CRTC:%d:%s]: %dx%d%s\n",
497 connector
->state
->crtc
->base
.id
,
498 connector
->state
->crtc
->name
,
499 modes
[i
]->hdisplay
, modes
[i
]->vdisplay
,
500 modes
[i
]->flags
& DRM_MODE_FLAG_INTERLACE
? "i" :"");
503 conn_configured
|= BIT(i
);
506 if ((conn_configured
& mask
) != mask
) {
512 * If the BIOS didn't enable everything it could, fall back to have the
513 * same user experiencing of lighting up as much as possible like the
514 * fbdev helper library.
516 if (num_connectors_enabled
!= num_connectors_detected
&&
517 num_connectors_enabled
< INTEL_INFO(dev
)->num_pipes
) {
518 DRM_DEBUG_KMS("fallback: Not all outputs enabled\n");
519 DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled
,
520 num_connectors_detected
);
526 DRM_DEBUG_KMS("Not using firmware configuration\n");
527 memcpy(enabled
, save_enabled
, count
);
536 static const struct drm_fb_helper_funcs intel_fb_helper_funcs
= {
537 .initial_config
= intel_fb_initial_config
,
538 .gamma_set
= intel_crtc_fb_gamma_set
,
539 .gamma_get
= intel_crtc_fb_gamma_get
,
540 .fb_probe
= intelfb_create
,
543 static void intel_fbdev_destroy(struct intel_fbdev
*ifbdev
)
545 /* We rely on the object-free to release the VMA pinning for
546 * the info->screen_base mmaping. Leaking the VMA is simpler than
547 * trying to rectify all the possible error paths leading here.
550 drm_fb_helper_unregister_fbi(&ifbdev
->helper
);
551 drm_fb_helper_release_fbi(&ifbdev
->helper
);
553 drm_fb_helper_fini(&ifbdev
->helper
);
556 mutex_lock(&ifbdev
->helper
.dev
->struct_mutex
);
557 intel_unpin_fb_obj(&ifbdev
->fb
->base
, BIT(DRM_ROTATE_0
));
558 mutex_unlock(&ifbdev
->helper
.dev
->struct_mutex
);
560 drm_framebuffer_remove(&ifbdev
->fb
->base
);
567 * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible.
568 * The core display code will have read out the current plane configuration,
569 * so we use that to figure out if there's an object for us to use as the
570 * fb, and if so, we re-use it for the fbdev configuration.
572 * Note we only support a single fb shared across pipes for boot (mostly for
573 * fbcon), so we just find the biggest and use that.
575 static bool intel_fbdev_init_bios(struct drm_device
*dev
,
576 struct intel_fbdev
*ifbdev
)
578 struct intel_framebuffer
*fb
= NULL
;
579 struct drm_crtc
*crtc
;
580 struct intel_crtc
*intel_crtc
;
581 unsigned int max_size
= 0;
583 /* Find the largest fb */
584 for_each_crtc(dev
, crtc
) {
585 struct drm_i915_gem_object
*obj
=
586 intel_fb_obj(crtc
->primary
->state
->fb
);
587 intel_crtc
= to_intel_crtc(crtc
);
589 if (!crtc
->state
->active
|| !obj
) {
590 DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n",
591 pipe_name(intel_crtc
->pipe
));
595 if (obj
->base
.size
> max_size
) {
596 DRM_DEBUG_KMS("found possible fb from plane %c\n",
597 pipe_name(intel_crtc
->pipe
));
598 fb
= to_intel_framebuffer(crtc
->primary
->state
->fb
);
599 max_size
= obj
->base
.size
;
604 DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n");
608 /* Now make sure all the pipes will fit into it */
609 for_each_crtc(dev
, crtc
) {
610 unsigned int cur_size
;
612 intel_crtc
= to_intel_crtc(crtc
);
614 if (!crtc
->state
->active
) {
615 DRM_DEBUG_KMS("pipe %c not active, skipping\n",
616 pipe_name(intel_crtc
->pipe
));
620 DRM_DEBUG_KMS("checking plane %c for BIOS fb\n",
621 pipe_name(intel_crtc
->pipe
));
624 * See if the plane fb we found above will fit on this
625 * pipe. Note we need to use the selected fb's pitch and bpp
626 * rather than the current pipe's, since they differ.
628 cur_size
= intel_crtc
->config
->base
.adjusted_mode
.crtc_hdisplay
;
629 cur_size
= cur_size
* fb
->base
.bits_per_pixel
/ 8;
630 if (fb
->base
.pitches
[0] < cur_size
) {
631 DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n",
632 pipe_name(intel_crtc
->pipe
),
633 cur_size
, fb
->base
.pitches
[0]);
638 cur_size
= intel_crtc
->config
->base
.adjusted_mode
.crtc_vdisplay
;
639 cur_size
= intel_fb_align_height(dev
, cur_size
,
640 fb
->base
.pixel_format
,
641 fb
->base
.modifier
[0]);
642 cur_size
*= fb
->base
.pitches
[0];
643 DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n",
644 pipe_name(intel_crtc
->pipe
),
645 intel_crtc
->config
->base
.adjusted_mode
.crtc_hdisplay
,
646 intel_crtc
->config
->base
.adjusted_mode
.crtc_vdisplay
,
647 fb
->base
.bits_per_pixel
,
650 if (cur_size
> max_size
) {
651 DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n",
652 pipe_name(intel_crtc
->pipe
),
658 DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n",
659 pipe_name(intel_crtc
->pipe
),
664 DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n");
668 ifbdev
->preferred_bpp
= fb
->base
.bits_per_pixel
;
671 drm_framebuffer_reference(&ifbdev
->fb
->base
);
673 /* Final pass to check if any active pipes don't have fbs */
674 for_each_crtc(dev
, crtc
) {
675 intel_crtc
= to_intel_crtc(crtc
);
677 if (!crtc
->state
->active
)
680 WARN(!crtc
->primary
->fb
,
681 "re-used BIOS config but lost an fb on crtc %d\n",
686 DRM_DEBUG_KMS("using BIOS fb for initial console\n");
694 static void intel_fbdev_suspend_worker(struct work_struct
*work
)
696 intel_fbdev_set_suspend(container_of(work
,
697 struct drm_i915_private
,
698 fbdev_suspend_work
)->dev
,
699 FBINFO_STATE_RUNNING
,
703 int intel_fbdev_init(struct drm_device
*dev
)
705 struct intel_fbdev
*ifbdev
;
706 struct drm_i915_private
*dev_priv
= to_i915(dev
);
709 if (WARN_ON(INTEL_INFO(dev
)->num_pipes
== 0))
712 ifbdev
= kzalloc(sizeof(struct intel_fbdev
), GFP_KERNEL
);
716 drm_fb_helper_prepare(dev
, &ifbdev
->helper
, &intel_fb_helper_funcs
);
718 if (!intel_fbdev_init_bios(dev
, ifbdev
))
719 ifbdev
->preferred_bpp
= 32;
721 ret
= drm_fb_helper_init(dev
, &ifbdev
->helper
,
722 INTEL_INFO(dev
)->num_pipes
, 4);
728 dev_priv
->fbdev
= ifbdev
;
729 INIT_WORK(&dev_priv
->fbdev_suspend_work
, intel_fbdev_suspend_worker
);
731 drm_fb_helper_single_add_all_connectors(&ifbdev
->helper
);
736 static void intel_fbdev_initial_config(void *data
, async_cookie_t cookie
)
738 struct intel_fbdev
*ifbdev
= data
;
740 /* Due to peculiar init order wrt to hpd handling this is separate. */
741 if (drm_fb_helper_initial_config(&ifbdev
->helper
,
742 ifbdev
->preferred_bpp
))
743 intel_fbdev_fini(ifbdev
->helper
.dev
);
746 void intel_fbdev_initial_config_async(struct drm_device
*dev
)
748 struct intel_fbdev
*ifbdev
= to_i915(dev
)->fbdev
;
750 ifbdev
->cookie
= async_schedule(intel_fbdev_initial_config
, ifbdev
);
753 static void intel_fbdev_sync(struct intel_fbdev
*ifbdev
)
758 /* Only serialises with all preceding async calls, hence +1 */
759 async_synchronize_cookie(ifbdev
->cookie
+ 1);
763 void intel_fbdev_fini(struct drm_device
*dev
)
765 struct drm_i915_private
*dev_priv
= to_i915(dev
);
766 struct intel_fbdev
*ifbdev
= dev_priv
->fbdev
;
771 flush_work(&dev_priv
->fbdev_suspend_work
);
772 if (!current_is_async())
773 intel_fbdev_sync(ifbdev
);
775 intel_fbdev_destroy(ifbdev
);
776 dev_priv
->fbdev
= NULL
;
779 void intel_fbdev_set_suspend(struct drm_device
*dev
, int state
, bool synchronous
)
781 struct drm_i915_private
*dev_priv
= to_i915(dev
);
782 struct intel_fbdev
*ifbdev
= dev_priv
->fbdev
;
783 struct fb_info
*info
;
788 info
= ifbdev
->helper
.fbdev
;
791 /* Flush any pending work to turn the console on, and then
792 * wait to turn it off. It must be synchronous as we are
793 * about to suspend or unload the driver.
795 * Note that from within the work-handler, we cannot flush
796 * ourselves, so only flush outstanding work upon suspend!
798 if (state
!= FBINFO_STATE_RUNNING
)
799 flush_work(&dev_priv
->fbdev_suspend_work
);
803 * The console lock can be pretty contented on resume due
804 * to all the printk activity. Try to keep it out of the hot
805 * path of resume if possible.
807 WARN_ON(state
!= FBINFO_STATE_RUNNING
);
808 if (!console_trylock()) {
809 /* Don't block our own workqueue as this can
810 * be run in parallel with other i915.ko tasks.
812 schedule_work(&dev_priv
->fbdev_suspend_work
);
817 /* On resume from hibernation: If the object is shmemfs backed, it has
818 * been restored from swap. If the object is stolen however, it will be
819 * full of whatever garbage was left in there.
821 if (state
== FBINFO_STATE_RUNNING
&& ifbdev
->fb
->obj
->stolen
)
822 memset_io(info
->screen_base
, 0, info
->screen_size
);
824 drm_fb_helper_set_suspend(&ifbdev
->helper
, state
);
828 void intel_fbdev_output_poll_changed(struct drm_device
*dev
)
830 struct drm_i915_private
*dev_priv
= to_i915(dev
);
832 drm_fb_helper_hotplug_event(&dev_priv
->fbdev
->helper
);
835 void intel_fbdev_restore_mode(struct drm_device
*dev
)
838 struct drm_i915_private
*dev_priv
= to_i915(dev
);
839 struct intel_fbdev
*ifbdev
= dev_priv
->fbdev
;
840 struct drm_fb_helper
*fb_helper
;
845 intel_fbdev_sync(ifbdev
);
847 fb_helper
= &ifbdev
->helper
;
849 ret
= drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper
);
851 DRM_DEBUG("failed to restore crtc mode\n");
853 mutex_lock(&fb_helper
->dev
->struct_mutex
);
854 intel_fb_obj_invalidate(ifbdev
->fb
->obj
, ORIGIN_GTT
);
855 mutex_unlock(&fb_helper
->dev
->struct_mutex
);