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
;
77 uint32_t pipe2vbl(struct drm_crtc
*crtc
)
79 struct omap_crtc
*omap_crtc
= to_omap_crtc(crtc
);
81 return dispc_mgr_get_vsync_irq(omap_crtc
->channel
);
85 * Manager-ops, callbacks from output when they need to configure
86 * the upstream part of the video pipe.
88 * Most of these we can ignore until we add support for command-mode
89 * panels.. for video-mode the crtc-helpers already do an adequate
90 * job of sequencing the setup of the video pipe in the proper order
93 /* we can probably ignore these until we support command-mode panels: */
94 static void omap_crtc_start_update(struct omap_overlay_manager
*mgr
)
98 static int omap_crtc_enable(struct omap_overlay_manager
*mgr
)
103 static void omap_crtc_disable(struct omap_overlay_manager
*mgr
)
107 static void omap_crtc_set_timings(struct omap_overlay_manager
*mgr
,
108 const struct omap_video_timings
*timings
)
110 struct omap_crtc
*omap_crtc
= container_of(mgr
, struct omap_crtc
, mgr
);
111 DBG("%s", omap_crtc
->name
);
112 omap_crtc
->timings
= *timings
;
113 omap_crtc
->full_update
= true;
116 static void omap_crtc_set_lcd_config(struct omap_overlay_manager
*mgr
,
117 const struct dss_lcd_mgr_config
*config
)
119 struct omap_crtc
*omap_crtc
= container_of(mgr
, struct omap_crtc
, mgr
);
120 DBG("%s", omap_crtc
->name
);
121 dispc_mgr_set_lcd_config(omap_crtc
->channel
, config
);
124 static int omap_crtc_register_framedone_handler(
125 struct omap_overlay_manager
*mgr
,
126 void (*handler
)(void *), void *data
)
131 static void omap_crtc_unregister_framedone_handler(
132 struct omap_overlay_manager
*mgr
,
133 void (*handler
)(void *), void *data
)
137 static const struct dss_mgr_ops mgr_ops
= {
138 .start_update
= omap_crtc_start_update
,
139 .enable
= omap_crtc_enable
,
140 .disable
= omap_crtc_disable
,
141 .set_timings
= omap_crtc_set_timings
,
142 .set_lcd_config
= omap_crtc_set_lcd_config
,
143 .register_framedone_handler
= omap_crtc_register_framedone_handler
,
144 .unregister_framedone_handler
= omap_crtc_unregister_framedone_handler
,
151 static void omap_crtc_destroy(struct drm_crtc
*crtc
)
153 struct omap_crtc
*omap_crtc
= to_omap_crtc(crtc
);
155 DBG("%s", omap_crtc
->name
);
157 WARN_ON(omap_crtc
->apply_irq
.registered
);
158 omap_irq_unregister(crtc
->dev
, &omap_crtc
->error_irq
);
160 omap_crtc
->plane
->funcs
->destroy(omap_crtc
->plane
);
161 drm_crtc_cleanup(crtc
);
166 static void omap_crtc_dpms(struct drm_crtc
*crtc
, int mode
)
168 struct omap_drm_private
*priv
= crtc
->dev
->dev_private
;
169 struct omap_crtc
*omap_crtc
= to_omap_crtc(crtc
);
170 bool enabled
= (mode
== DRM_MODE_DPMS_ON
);
173 DBG("%s: %d", omap_crtc
->name
, mode
);
175 if (enabled
!= omap_crtc
->enabled
) {
176 omap_crtc
->enabled
= enabled
;
177 omap_crtc
->full_update
= true;
178 omap_crtc_apply(crtc
, &omap_crtc
->apply
);
180 /* also enable our private plane: */
181 WARN_ON(omap_plane_dpms(omap_crtc
->plane
, mode
));
183 /* and any attached overlay planes: */
184 for (i
= 0; i
< priv
->num_planes
; i
++) {
185 struct drm_plane
*plane
= priv
->planes
[i
];
186 if (plane
->crtc
== crtc
)
187 WARN_ON(omap_plane_dpms(plane
, mode
));
192 static bool omap_crtc_mode_fixup(struct drm_crtc
*crtc
,
193 const struct drm_display_mode
*mode
,
194 struct drm_display_mode
*adjusted_mode
)
199 static int omap_crtc_mode_set(struct drm_crtc
*crtc
,
200 struct drm_display_mode
*mode
,
201 struct drm_display_mode
*adjusted_mode
,
203 struct drm_framebuffer
*old_fb
)
205 struct omap_crtc
*omap_crtc
= to_omap_crtc(crtc
);
207 mode
= adjusted_mode
;
209 DBG("%s: set mode: %d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x",
210 omap_crtc
->name
, mode
->base
.id
, mode
->name
,
211 mode
->vrefresh
, mode
->clock
,
212 mode
->hdisplay
, mode
->hsync_start
,
213 mode
->hsync_end
, mode
->htotal
,
214 mode
->vdisplay
, mode
->vsync_start
,
215 mode
->vsync_end
, mode
->vtotal
,
216 mode
->type
, mode
->flags
);
218 copy_timings_drm_to_omap(&omap_crtc
->timings
, mode
);
219 omap_crtc
->full_update
= true;
221 return omap_plane_mode_set(omap_crtc
->plane
, crtc
, crtc
->fb
,
222 0, 0, mode
->hdisplay
, mode
->vdisplay
,
224 mode
->hdisplay
<< 16, mode
->vdisplay
<< 16,
228 static void omap_crtc_prepare(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_OFF
);
235 static void omap_crtc_commit(struct drm_crtc
*crtc
)
237 struct omap_crtc
*omap_crtc
= to_omap_crtc(crtc
);
238 DBG("%s", omap_crtc
->name
);
239 omap_crtc_dpms(crtc
, DRM_MODE_DPMS_ON
);
242 static int omap_crtc_mode_set_base(struct drm_crtc
*crtc
, int x
, int y
,
243 struct drm_framebuffer
*old_fb
)
245 struct omap_crtc
*omap_crtc
= to_omap_crtc(crtc
);
246 struct drm_plane
*plane
= omap_crtc
->plane
;
247 struct drm_display_mode
*mode
= &crtc
->mode
;
249 return omap_plane_mode_set(plane
, crtc
, crtc
->fb
,
250 0, 0, mode
->hdisplay
, mode
->vdisplay
,
252 mode
->hdisplay
<< 16, mode
->vdisplay
<< 16,
256 static void omap_crtc_load_lut(struct drm_crtc
*crtc
)
260 static void vblank_cb(void *arg
)
262 struct drm_crtc
*crtc
= arg
;
263 struct drm_device
*dev
= crtc
->dev
;
264 struct omap_crtc
*omap_crtc
= to_omap_crtc(crtc
);
267 spin_lock_irqsave(&dev
->event_lock
, flags
);
269 /* wakeup userspace */
270 if (omap_crtc
->event
)
271 drm_send_vblank_event(dev
, omap_crtc
->pipe
, omap_crtc
->event
);
273 omap_crtc
->event
= NULL
;
274 omap_crtc
->old_fb
= NULL
;
276 spin_unlock_irqrestore(&dev
->event_lock
, flags
);
279 static void page_flip_worker(struct work_struct
*work
)
281 struct omap_crtc
*omap_crtc
=
282 container_of(work
, struct omap_crtc
, page_flip_work
);
283 struct drm_crtc
*crtc
= &omap_crtc
->base
;
284 struct drm_display_mode
*mode
= &crtc
->mode
;
285 struct drm_gem_object
*bo
;
287 mutex_lock(&crtc
->mutex
);
288 omap_plane_mode_set(omap_crtc
->plane
, crtc
, crtc
->fb
,
289 0, 0, mode
->hdisplay
, mode
->vdisplay
,
290 crtc
->x
<< 16, crtc
->y
<< 16,
291 mode
->hdisplay
<< 16, mode
->vdisplay
<< 16,
293 mutex_unlock(&crtc
->mutex
);
295 bo
= omap_framebuffer_bo(crtc
->fb
, 0);
296 drm_gem_object_unreference_unlocked(bo
);
299 static void page_flip_cb(void *arg
)
301 struct drm_crtc
*crtc
= arg
;
302 struct omap_crtc
*omap_crtc
= to_omap_crtc(crtc
);
303 struct omap_drm_private
*priv
= crtc
->dev
->dev_private
;
305 /* avoid assumptions about what ctxt we are called from: */
306 queue_work(priv
->wq
, &omap_crtc
->page_flip_work
);
309 static int omap_crtc_page_flip_locked(struct drm_crtc
*crtc
,
310 struct drm_framebuffer
*fb
,
311 struct drm_pending_vblank_event
*event
)
313 struct drm_device
*dev
= crtc
->dev
;
314 struct omap_crtc
*omap_crtc
= to_omap_crtc(crtc
);
315 struct drm_gem_object
*bo
;
317 DBG("%d -> %d (event=%p)", crtc
->fb
? crtc
->fb
->base
.id
: -1,
320 if (omap_crtc
->old_fb
) {
321 dev_err(dev
->dev
, "already a pending flip\n");
325 omap_crtc
->event
= event
;
329 * Hold a reference temporarily until the crtc is updated
330 * and takes the reference to the bo. This avoids it
331 * getting freed from under us:
333 bo
= omap_framebuffer_bo(fb
, 0);
334 drm_gem_object_reference(bo
);
336 omap_gem_op_async(bo
, OMAP_GEM_READ
, page_flip_cb
, crtc
);
341 static int omap_crtc_set_property(struct drm_crtc
*crtc
,
342 struct drm_property
*property
, uint64_t val
)
344 struct omap_crtc
*omap_crtc
= to_omap_crtc(crtc
);
345 struct omap_drm_private
*priv
= crtc
->dev
->dev_private
;
347 if (property
== priv
->rotation_prop
) {
348 crtc
->invert_dimensions
=
349 !!(val
& ((1LL << DRM_ROTATE_90
) | (1LL << DRM_ROTATE_270
)));
352 return omap_plane_set_property(omap_crtc
->plane
, property
, val
);
355 static const struct drm_crtc_funcs omap_crtc_funcs
= {
356 .set_config
= drm_crtc_helper_set_config
,
357 .destroy
= omap_crtc_destroy
,
358 .page_flip
= omap_crtc_page_flip_locked
,
359 .set_property
= omap_crtc_set_property
,
362 static const struct drm_crtc_helper_funcs omap_crtc_helper_funcs
= {
363 .dpms
= omap_crtc_dpms
,
364 .mode_fixup
= omap_crtc_mode_fixup
,
365 .mode_set
= omap_crtc_mode_set
,
366 .prepare
= omap_crtc_prepare
,
367 .commit
= omap_crtc_commit
,
368 .mode_set_base
= omap_crtc_mode_set_base
,
369 .load_lut
= omap_crtc_load_lut
,
372 const struct omap_video_timings
*omap_crtc_timings(struct drm_crtc
*crtc
)
374 struct omap_crtc
*omap_crtc
= to_omap_crtc(crtc
);
375 return &omap_crtc
->timings
;
378 enum omap_channel
omap_crtc_channel(struct drm_crtc
*crtc
)
380 struct omap_crtc
*omap_crtc
= to_omap_crtc(crtc
);
381 return omap_crtc
->channel
;
384 static void omap_crtc_error_irq(struct omap_drm_irq
*irq
, uint32_t irqstatus
)
386 struct omap_crtc
*omap_crtc
=
387 container_of(irq
, struct omap_crtc
, error_irq
);
388 struct drm_crtc
*crtc
= &omap_crtc
->base
;
389 DRM_ERROR("%s: errors: %08x\n", omap_crtc
->name
, irqstatus
);
390 /* avoid getting in a flood, unregister the irq until next vblank */
391 omap_irq_unregister(crtc
->dev
, &omap_crtc
->error_irq
);
394 static void omap_crtc_apply_irq(struct omap_drm_irq
*irq
, uint32_t irqstatus
)
396 struct omap_crtc
*omap_crtc
=
397 container_of(irq
, struct omap_crtc
, apply_irq
);
398 struct drm_crtc
*crtc
= &omap_crtc
->base
;
400 if (!omap_crtc
->error_irq
.registered
)
401 omap_irq_register(crtc
->dev
, &omap_crtc
->error_irq
);
403 if (!dispc_mgr_go_busy(omap_crtc
->channel
)) {
404 struct omap_drm_private
*priv
=
405 crtc
->dev
->dev_private
;
406 DBG("%s: apply done", omap_crtc
->name
);
407 omap_irq_unregister(crtc
->dev
, &omap_crtc
->apply_irq
);
408 queue_work(priv
->wq
, &omap_crtc
->apply_work
);
412 static void apply_worker(struct work_struct
*work
)
414 struct omap_crtc
*omap_crtc
=
415 container_of(work
, struct omap_crtc
, apply_work
);
416 struct drm_crtc
*crtc
= &omap_crtc
->base
;
417 struct drm_device
*dev
= crtc
->dev
;
418 struct omap_drm_apply
*apply
, *n
;
422 * Synchronize everything on mode_config.mutex, to keep
423 * the callbacks and list modification all serialized
424 * with respect to modesetting ioctls from userspace.
426 mutex_lock(&crtc
->mutex
);
430 * If we are still pending a previous update, wait.. when the
431 * pending update completes, we get kicked again.
433 if (omap_crtc
->apply_irq
.registered
)
436 /* finish up previous apply's: */
437 list_for_each_entry_safe(apply
, n
,
438 &omap_crtc
->pending_applies
, pending_node
) {
439 apply
->post_apply(apply
);
440 list_del(&apply
->pending_node
);
443 need_apply
= !list_empty(&omap_crtc
->queued_applies
);
445 /* then handle the next round of of queued apply's: */
446 list_for_each_entry_safe(apply
, n
,
447 &omap_crtc
->queued_applies
, queued_node
) {
448 apply
->pre_apply(apply
);
449 list_del(&apply
->queued_node
);
450 apply
->queued
= false;
451 list_add_tail(&apply
->pending_node
,
452 &omap_crtc
->pending_applies
);
456 enum omap_channel channel
= omap_crtc
->channel
;
458 DBG("%s: GO", omap_crtc
->name
);
460 if (dispc_mgr_is_enabled(channel
)) {
461 omap_irq_register(dev
, &omap_crtc
->apply_irq
);
462 dispc_mgr_go(channel
);
464 struct omap_drm_private
*priv
= dev
->dev_private
;
465 queue_work(priv
->wq
, &omap_crtc
->apply_work
);
471 mutex_unlock(&crtc
->mutex
);
474 int omap_crtc_apply(struct drm_crtc
*crtc
,
475 struct omap_drm_apply
*apply
)
477 struct omap_crtc
*omap_crtc
= to_omap_crtc(crtc
);
479 WARN_ON(!mutex_is_locked(&crtc
->mutex
));
481 /* no need to queue it again if it is already queued: */
485 apply
->queued
= true;
486 list_add_tail(&apply
->queued_node
, &omap_crtc
->queued_applies
);
489 * If there are no currently pending updates, then go ahead and
490 * kick the worker immediately, otherwise it will run again when
491 * the current update finishes.
493 if (list_empty(&omap_crtc
->pending_applies
)) {
494 struct omap_drm_private
*priv
= crtc
->dev
->dev_private
;
495 queue_work(priv
->wq
, &omap_crtc
->apply_work
);
501 /* called only from apply */
502 static void set_enabled(struct drm_crtc
*crtc
, bool enable
)
504 struct drm_device
*dev
= crtc
->dev
;
505 struct omap_crtc
*omap_crtc
= to_omap_crtc(crtc
);
506 enum omap_channel channel
= omap_crtc
->channel
;
507 struct omap_irq_wait
*wait
= NULL
;
509 if (dispc_mgr_is_enabled(channel
) == enable
)
512 /* ignore sync-lost irqs during enable/disable */
513 omap_irq_unregister(crtc
->dev
, &omap_crtc
->error_irq
);
515 if (dispc_mgr_get_framedone_irq(channel
)) {
517 wait
= omap_irq_wait_init(dev
,
518 dispc_mgr_get_framedone_irq(channel
), 1);
522 * When we disable digit output, we need to wait until fields
523 * are done. Otherwise the DSS is still working, and turning
524 * off the clocks prevents DSS from going to OFF mode. And when
525 * enabling, we need to wait for the extra sync losts
527 wait
= omap_irq_wait_init(dev
,
528 dispc_mgr_get_vsync_irq(channel
), 2);
531 dispc_mgr_enable(channel
, enable
);
534 int ret
= omap_irq_wait(dev
, wait
, msecs_to_jiffies(100));
536 dev_err(dev
->dev
, "%s: timeout waiting for %s\n",
537 omap_crtc
->name
, enable
? "enable" : "disable");
541 omap_irq_register(crtc
->dev
, &omap_crtc
->error_irq
);
544 static void omap_crtc_pre_apply(struct omap_drm_apply
*apply
)
546 struct omap_crtc
*omap_crtc
=
547 container_of(apply
, struct omap_crtc
, apply
);
548 struct drm_crtc
*crtc
= &omap_crtc
->base
;
549 struct drm_encoder
*encoder
= NULL
;
551 DBG("%s: enabled=%d, full=%d", omap_crtc
->name
,
552 omap_crtc
->enabled
, omap_crtc
->full_update
);
554 if (omap_crtc
->full_update
) {
555 struct omap_drm_private
*priv
= crtc
->dev
->dev_private
;
557 for (i
= 0; i
< priv
->num_encoders
; i
++) {
558 if (priv
->encoders
[i
]->crtc
== crtc
) {
559 encoder
= priv
->encoders
[i
];
565 if (!omap_crtc
->enabled
) {
566 set_enabled(&omap_crtc
->base
, false);
568 omap_encoder_set_enabled(encoder
, false);
571 omap_encoder_set_enabled(encoder
, false);
572 omap_encoder_update(encoder
, &omap_crtc
->mgr
,
573 &omap_crtc
->timings
);
574 omap_encoder_set_enabled(encoder
, true);
575 omap_crtc
->full_update
= false;
578 dispc_mgr_setup(omap_crtc
->channel
, &omap_crtc
->info
);
579 dispc_mgr_set_timings(omap_crtc
->channel
,
580 &omap_crtc
->timings
);
581 set_enabled(&omap_crtc
->base
, true);
584 omap_crtc
->full_update
= false;
587 static void omap_crtc_post_apply(struct omap_drm_apply
*apply
)
589 /* nothing needed for post-apply */
592 static const char *channel_names
[] = {
593 [OMAP_DSS_CHANNEL_LCD
] = "lcd",
594 [OMAP_DSS_CHANNEL_DIGIT
] = "tv",
595 [OMAP_DSS_CHANNEL_LCD2
] = "lcd2",
598 /* initialize crtc */
599 struct drm_crtc
*omap_crtc_init(struct drm_device
*dev
,
600 struct drm_plane
*plane
, enum omap_channel channel
, int id
)
602 struct drm_crtc
*crtc
= NULL
;
603 struct omap_crtc
*omap_crtc
;
604 struct omap_overlay_manager_info
*info
;
606 DBG("%s", channel_names
[channel
]);
608 omap_crtc
= kzalloc(sizeof(*omap_crtc
), GFP_KERNEL
);
612 crtc
= &omap_crtc
->base
;
614 INIT_WORK(&omap_crtc
->page_flip_work
, page_flip_worker
);
615 INIT_WORK(&omap_crtc
->apply_work
, apply_worker
);
617 INIT_LIST_HEAD(&omap_crtc
->pending_applies
);
618 INIT_LIST_HEAD(&omap_crtc
->queued_applies
);
620 omap_crtc
->apply
.pre_apply
= omap_crtc_pre_apply
;
621 omap_crtc
->apply
.post_apply
= omap_crtc_post_apply
;
623 omap_crtc
->channel
= channel
;
624 omap_crtc
->plane
= plane
;
625 omap_crtc
->plane
->crtc
= crtc
;
626 omap_crtc
->name
= channel_names
[channel
];
627 omap_crtc
->pipe
= id
;
629 omap_crtc
->apply_irq
.irqmask
= pipe2vbl(crtc
);
630 omap_crtc
->apply_irq
.irq
= omap_crtc_apply_irq
;
632 omap_crtc
->error_irq
.irqmask
=
633 dispc_mgr_get_sync_lost_irq(channel
);
634 omap_crtc
->error_irq
.irq
= omap_crtc_error_irq
;
635 omap_irq_register(dev
, &omap_crtc
->error_irq
);
638 omap_crtc
->mgr
.id
= channel
;
640 dss_install_mgr_ops(&mgr_ops
);
642 /* TODO: fix hard-coded setup.. add properties! */
643 info
= &omap_crtc
->info
;
644 info
->default_color
= 0x00000000;
645 info
->trans_key
= 0x00000000;
646 info
->trans_key_type
= OMAP_DSS_COLOR_KEY_GFX_DST
;
647 info
->trans_enabled
= false;
649 drm_crtc_init(dev
, crtc
, &omap_crtc_funcs
);
650 drm_crtc_helper_add(crtc
, &omap_crtc_helper_funcs
);
652 omap_plane_install_properties(omap_crtc
->plane
, &crtc
->base
);
658 omap_crtc_destroy(crtc
);