2 * drivers/gpu/drm/omapdrm/omap_crtc.c
4 * Copyright (C) 2011 Texas Instruments
5 * Author: Rob Clark <rob@ti.com>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published by
9 * the Free Software Foundation.
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 * You should have received a copy of the GNU General Public License along with
17 * this program. If not, see <http://www.gnu.org/licenses/>.
22 #include <drm/drm_mode.h>
24 #include "drm_crtc_helper.h"
26 #define to_omap_crtc(x) container_of(x, struct omap_crtc, base)
30 struct drm_plane
*plane
;
34 enum omap_channel channel
;
35 struct omap_overlay_manager_info info
;
38 * Temporary: eventually this will go away, but it is needed
39 * for now to keep the output's happy. (They only need
40 * mgr->id.) Eventually this will be replaced w/ something
41 * more common-panel-framework-y
43 struct omap_overlay_manager mgr
;
45 struct omap_video_timings timings
;
49 struct omap_drm_apply apply
;
51 struct omap_drm_irq apply_irq
;
52 struct omap_drm_irq error_irq
;
54 /* list of in-progress apply's: */
55 struct list_head pending_applies
;
57 /* list of queued apply's: */
58 struct list_head queued_applies
;
60 /* for handling queued and in-progress applies: */
61 struct work_struct apply_work
;
63 /* if there is a pending flip, these will be non-null: */
64 struct drm_pending_vblank_event
*event
;
65 struct drm_framebuffer
*old_fb
;
67 /* for handling page flips without caring about what
68 * the callback is called from. Possibly we should just
69 * make omap_gem always call the cb from the worker so
70 * we don't have to care about this..
72 * XXX maybe fold into apply_work??
74 struct work_struct page_flip_work
;
78 * Manager-ops, callbacks from output when they need to configure
79 * the upstream part of the video pipe.
81 * Most of these we can ignore until we add support for command-mode
82 * panels.. for video-mode the crtc-helpers already do an adequate
83 * job of sequencing the setup of the video pipe in the proper order
86 /* we can probably ignore these until we support command-mode panels: */
87 static void omap_crtc_start_update(struct omap_overlay_manager
*mgr
)
91 static int omap_crtc_enable(struct omap_overlay_manager
*mgr
)
96 static void omap_crtc_disable(struct omap_overlay_manager
*mgr
)
100 static void omap_crtc_set_timings(struct omap_overlay_manager
*mgr
,
101 const struct omap_video_timings
*timings
)
103 struct omap_crtc
*omap_crtc
= container_of(mgr
, struct omap_crtc
, mgr
);
104 DBG("%s", omap_crtc
->name
);
105 omap_crtc
->timings
= *timings
;
106 omap_crtc
->full_update
= true;
109 static void omap_crtc_set_lcd_config(struct omap_overlay_manager
*mgr
,
110 const struct dss_lcd_mgr_config
*config
)
112 struct omap_crtc
*omap_crtc
= container_of(mgr
, struct omap_crtc
, mgr
);
113 DBG("%s", omap_crtc
->name
);
114 dispc_mgr_set_lcd_config(omap_crtc
->channel
, config
);
117 static int omap_crtc_register_framedone_handler(
118 struct omap_overlay_manager
*mgr
,
119 void (*handler
)(void *), void *data
)
124 static void omap_crtc_unregister_framedone_handler(
125 struct omap_overlay_manager
*mgr
,
126 void (*handler
)(void *), void *data
)
130 static const struct dss_mgr_ops mgr_ops
= {
131 .start_update
= omap_crtc_start_update
,
132 .enable
= omap_crtc_enable
,
133 .disable
= omap_crtc_disable
,
134 .set_timings
= omap_crtc_set_timings
,
135 .set_lcd_config
= omap_crtc_set_lcd_config
,
136 .register_framedone_handler
= omap_crtc_register_framedone_handler
,
137 .unregister_framedone_handler
= omap_crtc_unregister_framedone_handler
,
144 static void omap_crtc_destroy(struct drm_crtc
*crtc
)
146 struct omap_crtc
*omap_crtc
= to_omap_crtc(crtc
);
148 DBG("%s", omap_crtc
->name
);
150 WARN_ON(omap_crtc
->apply_irq
.registered
);
151 omap_irq_unregister(crtc
->dev
, &omap_crtc
->error_irq
);
153 omap_crtc
->plane
->funcs
->destroy(omap_crtc
->plane
);
154 drm_crtc_cleanup(crtc
);
159 static void omap_crtc_dpms(struct drm_crtc
*crtc
, int mode
)
161 struct omap_drm_private
*priv
= crtc
->dev
->dev_private
;
162 struct omap_crtc
*omap_crtc
= to_omap_crtc(crtc
);
163 bool enabled
= (mode
== DRM_MODE_DPMS_ON
);
166 DBG("%s: %d", omap_crtc
->name
, mode
);
168 if (enabled
!= omap_crtc
->enabled
) {
169 omap_crtc
->enabled
= enabled
;
170 omap_crtc
->full_update
= true;
171 omap_crtc_apply(crtc
, &omap_crtc
->apply
);
173 /* also enable our private plane: */
174 WARN_ON(omap_plane_dpms(omap_crtc
->plane
, mode
));
176 /* and any attached overlay planes: */
177 for (i
= 0; i
< priv
->num_planes
; i
++) {
178 struct drm_plane
*plane
= priv
->planes
[i
];
179 if (plane
->crtc
== crtc
)
180 WARN_ON(omap_plane_dpms(plane
, mode
));
185 static bool omap_crtc_mode_fixup(struct drm_crtc
*crtc
,
186 const struct drm_display_mode
*mode
,
187 struct drm_display_mode
*adjusted_mode
)
192 static int omap_crtc_mode_set(struct drm_crtc
*crtc
,
193 struct drm_display_mode
*mode
,
194 struct drm_display_mode
*adjusted_mode
,
196 struct drm_framebuffer
*old_fb
)
198 struct omap_crtc
*omap_crtc
= to_omap_crtc(crtc
);
200 mode
= adjusted_mode
;
202 DBG("%s: set mode: %d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x",
203 omap_crtc
->name
, mode
->base
.id
, mode
->name
,
204 mode
->vrefresh
, mode
->clock
,
205 mode
->hdisplay
, mode
->hsync_start
,
206 mode
->hsync_end
, mode
->htotal
,
207 mode
->vdisplay
, mode
->vsync_start
,
208 mode
->vsync_end
, mode
->vtotal
,
209 mode
->type
, mode
->flags
);
211 copy_timings_drm_to_omap(&omap_crtc
->timings
, mode
);
212 omap_crtc
->full_update
= true;
214 return omap_plane_mode_set(omap_crtc
->plane
, crtc
, crtc
->fb
,
215 0, 0, mode
->hdisplay
, mode
->vdisplay
,
217 mode
->hdisplay
<< 16, mode
->vdisplay
<< 16,
221 static void omap_crtc_prepare(struct drm_crtc
*crtc
)
223 struct omap_crtc
*omap_crtc
= to_omap_crtc(crtc
);
224 DBG("%s", omap_crtc
->name
);
225 omap_crtc_dpms(crtc
, DRM_MODE_DPMS_OFF
);
228 static void omap_crtc_commit(struct drm_crtc
*crtc
)
230 struct omap_crtc
*omap_crtc
= to_omap_crtc(crtc
);
231 DBG("%s", omap_crtc
->name
);
232 omap_crtc_dpms(crtc
, DRM_MODE_DPMS_ON
);
235 static int omap_crtc_mode_set_base(struct drm_crtc
*crtc
, int x
, int y
,
236 struct drm_framebuffer
*old_fb
)
238 struct omap_crtc
*omap_crtc
= to_omap_crtc(crtc
);
239 struct drm_plane
*plane
= omap_crtc
->plane
;
240 struct drm_display_mode
*mode
= &crtc
->mode
;
242 return omap_plane_mode_set(plane
, crtc
, crtc
->fb
,
243 0, 0, mode
->hdisplay
, mode
->vdisplay
,
245 mode
->hdisplay
<< 16, mode
->vdisplay
<< 16,
249 static void omap_crtc_load_lut(struct drm_crtc
*crtc
)
253 static void vblank_cb(void *arg
)
255 struct drm_crtc
*crtc
= arg
;
256 struct drm_device
*dev
= crtc
->dev
;
257 struct omap_crtc
*omap_crtc
= to_omap_crtc(crtc
);
260 spin_lock_irqsave(&dev
->event_lock
, flags
);
262 /* wakeup userspace */
263 if (omap_crtc
->event
)
264 drm_send_vblank_event(dev
, omap_crtc
->pipe
, omap_crtc
->event
);
266 omap_crtc
->event
= NULL
;
267 omap_crtc
->old_fb
= NULL
;
269 spin_unlock_irqrestore(&dev
->event_lock
, flags
);
272 static void page_flip_worker(struct work_struct
*work
)
274 struct omap_crtc
*omap_crtc
=
275 container_of(work
, struct omap_crtc
, page_flip_work
);
276 struct drm_crtc
*crtc
= &omap_crtc
->base
;
277 struct drm_display_mode
*mode
= &crtc
->mode
;
278 struct drm_gem_object
*bo
;
280 mutex_lock(&crtc
->mutex
);
281 omap_plane_mode_set(omap_crtc
->plane
, crtc
, crtc
->fb
,
282 0, 0, mode
->hdisplay
, mode
->vdisplay
,
283 crtc
->x
<< 16, crtc
->y
<< 16,
284 mode
->hdisplay
<< 16, mode
->vdisplay
<< 16,
286 mutex_unlock(&crtc
->mutex
);
288 bo
= omap_framebuffer_bo(crtc
->fb
, 0);
289 drm_gem_object_unreference_unlocked(bo
);
292 static void page_flip_cb(void *arg
)
294 struct drm_crtc
*crtc
= arg
;
295 struct omap_crtc
*omap_crtc
= to_omap_crtc(crtc
);
296 struct omap_drm_private
*priv
= crtc
->dev
->dev_private
;
298 /* avoid assumptions about what ctxt we are called from: */
299 queue_work(priv
->wq
, &omap_crtc
->page_flip_work
);
302 static int omap_crtc_page_flip_locked(struct drm_crtc
*crtc
,
303 struct drm_framebuffer
*fb
,
304 struct drm_pending_vblank_event
*event
)
306 struct drm_device
*dev
= crtc
->dev
;
307 struct omap_crtc
*omap_crtc
= to_omap_crtc(crtc
);
308 struct drm_gem_object
*bo
;
310 DBG("%d -> %d (event=%p)", crtc
->fb
? crtc
->fb
->base
.id
: -1,
313 if (omap_crtc
->old_fb
) {
314 dev_err(dev
->dev
, "already a pending flip\n");
318 omap_crtc
->event
= event
;
322 * Hold a reference temporarily until the crtc is updated
323 * and takes the reference to the bo. This avoids it
324 * getting freed from under us:
326 bo
= omap_framebuffer_bo(fb
, 0);
327 drm_gem_object_reference(bo
);
329 omap_gem_op_async(bo
, OMAP_GEM_READ
, page_flip_cb
, crtc
);
334 static int omap_crtc_set_property(struct drm_crtc
*crtc
,
335 struct drm_property
*property
, uint64_t val
)
337 struct omap_crtc
*omap_crtc
= to_omap_crtc(crtc
);
338 struct omap_drm_private
*priv
= crtc
->dev
->dev_private
;
340 if (property
== priv
->rotation_prop
) {
341 crtc
->invert_dimensions
=
342 !!(val
& ((1LL << DRM_ROTATE_90
) | (1LL << DRM_ROTATE_270
)));
345 return omap_plane_set_property(omap_crtc
->plane
, property
, val
);
348 static const struct drm_crtc_funcs omap_crtc_funcs
= {
349 .set_config
= drm_crtc_helper_set_config
,
350 .destroy
= omap_crtc_destroy
,
351 .page_flip
= omap_crtc_page_flip_locked
,
352 .set_property
= omap_crtc_set_property
,
355 static const struct drm_crtc_helper_funcs omap_crtc_helper_funcs
= {
356 .dpms
= omap_crtc_dpms
,
357 .mode_fixup
= omap_crtc_mode_fixup
,
358 .mode_set
= omap_crtc_mode_set
,
359 .prepare
= omap_crtc_prepare
,
360 .commit
= omap_crtc_commit
,
361 .mode_set_base
= omap_crtc_mode_set_base
,
362 .load_lut
= omap_crtc_load_lut
,
365 const struct omap_video_timings
*omap_crtc_timings(struct drm_crtc
*crtc
)
367 struct omap_crtc
*omap_crtc
= to_omap_crtc(crtc
);
368 return &omap_crtc
->timings
;
371 enum omap_channel
omap_crtc_channel(struct drm_crtc
*crtc
)
373 struct omap_crtc
*omap_crtc
= to_omap_crtc(crtc
);
374 return omap_crtc
->channel
;
377 static void omap_crtc_error_irq(struct omap_drm_irq
*irq
, uint32_t irqstatus
)
379 struct omap_crtc
*omap_crtc
=
380 container_of(irq
, struct omap_crtc
, error_irq
);
381 struct drm_crtc
*crtc
= &omap_crtc
->base
;
382 DRM_ERROR("%s: errors: %08x\n", omap_crtc
->name
, irqstatus
);
383 /* avoid getting in a flood, unregister the irq until next vblank */
384 omap_irq_unregister(crtc
->dev
, &omap_crtc
->error_irq
);
387 static void omap_crtc_apply_irq(struct omap_drm_irq
*irq
, uint32_t irqstatus
)
389 struct omap_crtc
*omap_crtc
=
390 container_of(irq
, struct omap_crtc
, apply_irq
);
391 struct drm_crtc
*crtc
= &omap_crtc
->base
;
393 if (!omap_crtc
->error_irq
.registered
)
394 omap_irq_register(crtc
->dev
, &omap_crtc
->error_irq
);
396 if (!dispc_mgr_go_busy(omap_crtc
->channel
)) {
397 struct omap_drm_private
*priv
=
398 crtc
->dev
->dev_private
;
399 DBG("%s: apply done", omap_crtc
->name
);
400 omap_irq_unregister(crtc
->dev
, &omap_crtc
->apply_irq
);
401 queue_work(priv
->wq
, &omap_crtc
->apply_work
);
405 static void apply_worker(struct work_struct
*work
)
407 struct omap_crtc
*omap_crtc
=
408 container_of(work
, struct omap_crtc
, apply_work
);
409 struct drm_crtc
*crtc
= &omap_crtc
->base
;
410 struct drm_device
*dev
= crtc
->dev
;
411 struct omap_drm_apply
*apply
, *n
;
415 * Synchronize everything on mode_config.mutex, to keep
416 * the callbacks and list modification all serialized
417 * with respect to modesetting ioctls from userspace.
419 mutex_lock(&crtc
->mutex
);
423 * If we are still pending a previous update, wait.. when the
424 * pending update completes, we get kicked again.
426 if (omap_crtc
->apply_irq
.registered
)
429 /* finish up previous apply's: */
430 list_for_each_entry_safe(apply
, n
,
431 &omap_crtc
->pending_applies
, pending_node
) {
432 apply
->post_apply(apply
);
433 list_del(&apply
->pending_node
);
436 need_apply
= !list_empty(&omap_crtc
->queued_applies
);
438 /* then handle the next round of of queued apply's: */
439 list_for_each_entry_safe(apply
, n
,
440 &omap_crtc
->queued_applies
, queued_node
) {
441 apply
->pre_apply(apply
);
442 list_del(&apply
->queued_node
);
443 apply
->queued
= false;
444 list_add_tail(&apply
->pending_node
,
445 &omap_crtc
->pending_applies
);
449 enum omap_channel channel
= omap_crtc
->channel
;
451 DBG("%s: GO", omap_crtc
->name
);
453 if (dispc_mgr_is_enabled(channel
)) {
454 omap_irq_register(dev
, &omap_crtc
->apply_irq
);
455 dispc_mgr_go(channel
);
457 struct omap_drm_private
*priv
= dev
->dev_private
;
458 queue_work(priv
->wq
, &omap_crtc
->apply_work
);
464 mutex_unlock(&crtc
->mutex
);
467 int omap_crtc_apply(struct drm_crtc
*crtc
,
468 struct omap_drm_apply
*apply
)
470 struct omap_crtc
*omap_crtc
= to_omap_crtc(crtc
);
472 WARN_ON(!mutex_is_locked(&crtc
->mutex
));
474 /* no need to queue it again if it is already queued: */
478 apply
->queued
= true;
479 list_add_tail(&apply
->queued_node
, &omap_crtc
->queued_applies
);
482 * If there are no currently pending updates, then go ahead and
483 * kick the worker immediately, otherwise it will run again when
484 * the current update finishes.
486 if (list_empty(&omap_crtc
->pending_applies
)) {
487 struct omap_drm_private
*priv
= crtc
->dev
->dev_private
;
488 queue_work(priv
->wq
, &omap_crtc
->apply_work
);
494 /* called only from apply */
495 static void set_enabled(struct drm_crtc
*crtc
, bool enable
)
497 struct drm_device
*dev
= crtc
->dev
;
498 struct omap_crtc
*omap_crtc
= to_omap_crtc(crtc
);
499 enum omap_channel channel
= omap_crtc
->channel
;
500 struct omap_irq_wait
*wait
= NULL
;
502 if (dispc_mgr_is_enabled(channel
) == enable
)
505 /* ignore sync-lost irqs during enable/disable */
506 omap_irq_unregister(crtc
->dev
, &omap_crtc
->error_irq
);
508 if (dispc_mgr_get_framedone_irq(channel
)) {
510 wait
= omap_irq_wait_init(dev
,
511 dispc_mgr_get_framedone_irq(channel
), 1);
515 * When we disable digit output, we need to wait until fields
516 * are done. Otherwise the DSS is still working, and turning
517 * off the clocks prevents DSS from going to OFF mode. And when
518 * enabling, we need to wait for the extra sync losts
520 wait
= omap_irq_wait_init(dev
,
521 dispc_mgr_get_vsync_irq(channel
), 2);
524 dispc_mgr_enable(channel
, enable
);
527 int ret
= omap_irq_wait(dev
, wait
, msecs_to_jiffies(100));
529 dev_err(dev
->dev
, "%s: timeout waiting for %s\n",
530 omap_crtc
->name
, enable
? "enable" : "disable");
534 omap_irq_register(crtc
->dev
, &omap_crtc
->error_irq
);
537 static void omap_crtc_pre_apply(struct omap_drm_apply
*apply
)
539 struct omap_crtc
*omap_crtc
=
540 container_of(apply
, struct omap_crtc
, apply
);
541 struct drm_crtc
*crtc
= &omap_crtc
->base
;
542 struct drm_encoder
*encoder
= NULL
;
544 DBG("%s: enabled=%d, full=%d", omap_crtc
->name
,
545 omap_crtc
->enabled
, omap_crtc
->full_update
);
547 if (omap_crtc
->full_update
) {
548 struct omap_drm_private
*priv
= crtc
->dev
->dev_private
;
550 for (i
= 0; i
< priv
->num_encoders
; i
++) {
551 if (priv
->encoders
[i
]->crtc
== crtc
) {
552 encoder
= priv
->encoders
[i
];
558 if (!omap_crtc
->enabled
) {
559 set_enabled(&omap_crtc
->base
, false);
561 omap_encoder_set_enabled(encoder
, false);
564 omap_encoder_set_enabled(encoder
, false);
565 omap_encoder_update(encoder
, &omap_crtc
->mgr
,
566 &omap_crtc
->timings
);
567 omap_encoder_set_enabled(encoder
, true);
568 omap_crtc
->full_update
= false;
571 dispc_mgr_setup(omap_crtc
->channel
, &omap_crtc
->info
);
572 dispc_mgr_set_timings(omap_crtc
->channel
,
573 &omap_crtc
->timings
);
574 set_enabled(&omap_crtc
->base
, true);
577 omap_crtc
->full_update
= false;
580 static void omap_crtc_post_apply(struct omap_drm_apply
*apply
)
582 /* nothing needed for post-apply */
585 static const char *channel_names
[] = {
586 [OMAP_DSS_CHANNEL_LCD
] = "lcd",
587 [OMAP_DSS_CHANNEL_DIGIT
] = "tv",
588 [OMAP_DSS_CHANNEL_LCD2
] = "lcd2",
591 /* initialize crtc */
592 struct drm_crtc
*omap_crtc_init(struct drm_device
*dev
,
593 struct drm_plane
*plane
, enum omap_channel channel
, int id
)
595 struct drm_crtc
*crtc
= NULL
;
596 struct omap_crtc
*omap_crtc
;
597 struct omap_overlay_manager_info
*info
;
599 DBG("%s", channel_names
[channel
]);
601 omap_crtc
= kzalloc(sizeof(*omap_crtc
), GFP_KERNEL
);
605 crtc
= &omap_crtc
->base
;
607 INIT_WORK(&omap_crtc
->page_flip_work
, page_flip_worker
);
608 INIT_WORK(&omap_crtc
->apply_work
, apply_worker
);
610 INIT_LIST_HEAD(&omap_crtc
->pending_applies
);
611 INIT_LIST_HEAD(&omap_crtc
->queued_applies
);
613 omap_crtc
->apply
.pre_apply
= omap_crtc_pre_apply
;
614 omap_crtc
->apply
.post_apply
= omap_crtc_post_apply
;
616 omap_crtc
->apply_irq
.irqmask
= pipe2vbl(id
);
617 omap_crtc
->apply_irq
.irq
= omap_crtc_apply_irq
;
619 omap_crtc
->error_irq
.irqmask
=
620 dispc_mgr_get_sync_lost_irq(channel
);
621 omap_crtc
->error_irq
.irq
= omap_crtc_error_irq
;
622 omap_irq_register(dev
, &omap_crtc
->error_irq
);
624 omap_crtc
->channel
= channel
;
625 omap_crtc
->plane
= plane
;
626 omap_crtc
->plane
->crtc
= crtc
;
627 omap_crtc
->name
= channel_names
[channel
];
628 omap_crtc
->pipe
= id
;
631 omap_crtc
->mgr
.id
= channel
;
633 dss_install_mgr_ops(&mgr_ops
);
635 /* TODO: fix hard-coded setup.. add properties! */
636 info
= &omap_crtc
->info
;
637 info
->default_color
= 0x00000000;
638 info
->trans_key
= 0x00000000;
639 info
->trans_key_type
= OMAP_DSS_COLOR_KEY_GFX_DST
;
640 info
->trans_enabled
= false;
642 drm_crtc_init(dev
, crtc
, &omap_crtc_funcs
);
643 drm_crtc_helper_add(crtc
, &omap_crtc_helper_funcs
);
645 omap_plane_install_properties(omap_crtc
->plane
, &crtc
->base
);
651 omap_crtc_destroy(crtc
);