1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com/
4 * Author: Rob Clark <rob@ti.com>
5 */
6
7#include <linux/dma-mapping.h>
8#include <linux/platform_device.h>
9#include <linux/of.h>
10#include <linux/sort.h>
11#include <linux/sys_soc.h>
12
13#include <drm/drm_atomic.h>
14#include <drm/drm_atomic_helper.h>
15#include <drm/drm_bridge.h>
16#include <drm/drm_bridge_connector.h>
17#include <drm/drm_drv.h>
18#include <drm/drm_file.h>
19#include <drm/drm_ioctl.h>
20#include <drm/drm_panel.h>
21#include <drm/drm_prime.h>
22#include <drm/drm_probe_helper.h>
23#include <drm/drm_vblank.h>
24
25#include "omap_dmm_tiler.h"
26#include "omap_drv.h"
27#include "omap_fbdev.h"
28
29#define DRIVER_NAME MODULE_NAME
30#define DRIVER_DESC "OMAP DRM"
31#define DRIVER_DATE "20110917"
32#define DRIVER_MAJOR 1
33#define DRIVER_MINOR 0
34#define DRIVER_PATCHLEVEL 0
35
36/*
37 * mode config funcs
38 */
39
40/* Notes about mapping DSS and DRM entities:
41 * CRTC: overlay
42 * encoder: manager.. with some extension to allow one primary CRTC
43 * and zero or more video CRTC's to be mapped to one encoder?
44 * connector: dssdev.. manager can be attached/detached from different
45 * devices
46 */
47
48static void omap_atomic_wait_for_completion(struct drm_device *dev,
49 struct drm_atomic_state *old_state)
50{
51 struct drm_crtc_state *new_crtc_state;
52 struct drm_crtc *crtc;
53 unsigned int i;
54 int ret;
55
56 for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) {
57 if (!new_crtc_state->active)
58 continue;
59
60 ret = omap_crtc_wait_pending(crtc);
61
62 if (!ret)
63 dev_warn(dev->dev,
64 "atomic complete timeout (pipe %u)!\n", i);
65 }
66}
67
68static void omap_atomic_commit_tail(struct drm_atomic_state *old_state)
69{
70 struct drm_device *dev = old_state->dev;
71 struct omap_drm_private *priv = dev->dev_private;
72
73 dispc_runtime_get(dispc: priv->dispc);
74
75 /* Apply the atomic update. */
76 drm_atomic_helper_commit_modeset_disables(dev, state: old_state);
77
78 if (priv->omaprev != 0x3430) {
79 /* With the current dss dispc implementation we have to enable
80 * the new modeset before we can commit planes. The dispc ovl
81 * configuration relies on the video mode configuration been
82 * written into the HW when the ovl configuration is
83 * calculated.
84 *
85 * This approach is not ideal because after a mode change the
86 * plane update is executed only after the first vblank
87 * interrupt. The dispc implementation should be fixed so that
88 * it is able use uncommitted drm state information.
89 */
90 drm_atomic_helper_commit_modeset_enables(dev, old_state);
91 omap_atomic_wait_for_completion(dev, old_state);
92
93 drm_atomic_helper_commit_planes(dev, state: old_state, flags: 0);
94
95 drm_atomic_helper_commit_hw_done(state: old_state);
96 } else {
97 /*
98 * OMAP3 DSS seems to have issues with the work-around above,
99 * resulting in endless sync losts if a crtc is enabled without
100 * a plane. For now, skip the WA for OMAP3.
101 */
102 drm_atomic_helper_commit_planes(dev, state: old_state, flags: 0);
103
104 drm_atomic_helper_commit_modeset_enables(dev, old_state);
105
106 drm_atomic_helper_commit_hw_done(state: old_state);
107 }
108
109 /*
110 * Wait for completion of the page flips to ensure that old buffers
111 * can't be touched by the hardware anymore before cleaning up planes.
112 */
113 omap_atomic_wait_for_completion(dev, old_state);
114
115 drm_atomic_helper_cleanup_planes(dev, old_state);
116
117 dispc_runtime_put(dispc: priv->dispc);
118}
119
120static int drm_atomic_state_normalized_zpos_cmp(const void *a, const void *b)
121{
122 const struct drm_plane_state *sa = *(struct drm_plane_state **)a;
123 const struct drm_plane_state *sb = *(struct drm_plane_state **)b;
124
125 if (sa->normalized_zpos != sb->normalized_zpos)
126 return sa->normalized_zpos - sb->normalized_zpos;
127 else
128 return sa->plane->base.id - sb->plane->base.id;
129}
130
131/*
132 * This replaces the drm_atomic_normalize_zpos to handle the dual overlay case.
133 *
134 * Since both halves need to be 'appear' side by side the zpos is
135 * recalculated when dealing with dual overlay cases so that the other
136 * planes zpos is consistent.
137 */
138static int omap_atomic_update_normalize_zpos(struct drm_device *dev,
139 struct drm_atomic_state *state)
140{
141 struct drm_crtc *crtc;
142 struct drm_crtc_state *old_state, *new_state;
143 struct drm_plane *plane;
144 int c, i, n, inc;
145 int total_planes = dev->mode_config.num_total_plane;
146 struct drm_plane_state **states;
147 int ret = 0;
148
149 states = kmalloc_array(n: total_planes, size: sizeof(*states), GFP_KERNEL);
150 if (!states)
151 return -ENOMEM;
152
153 for_each_oldnew_crtc_in_state(state, crtc, old_state, new_state, c) {
154 if (old_state->plane_mask == new_state->plane_mask &&
155 !new_state->zpos_changed)
156 continue;
157
158 /* Reset plane increment and index value for every crtc */
159 n = 0;
160
161 /*
162 * Normalization process might create new states for planes
163 * which normalized_zpos has to be recalculated.
164 */
165 drm_for_each_plane_mask(plane, dev, new_state->plane_mask) {
166 struct drm_plane_state *plane_state =
167 drm_atomic_get_plane_state(state: new_state->state,
168 plane);
169 if (IS_ERR(ptr: plane_state)) {
170 ret = PTR_ERR(ptr: plane_state);
171 goto done;
172 }
173 states[n++] = plane_state;
174 }
175
176 sort(base: states, num: n, size: sizeof(*states),
177 cmp_func: drm_atomic_state_normalized_zpos_cmp, NULL);
178
179 for (i = 0, inc = 0; i < n; i++) {
180 plane = states[i]->plane;
181
182 states[i]->normalized_zpos = i + inc;
183 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] updated normalized zpos value %d\n",
184 plane->base.id, plane->name,
185 states[i]->normalized_zpos);
186
187 if (is_omap_plane_dual_overlay(state: states[i]))
188 inc++;
189 }
190 new_state->zpos_changed = true;
191 }
192
193done:
194 kfree(objp: states);
195 return ret;
196}
197
198static int omap_atomic_check(struct drm_device *dev,
199 struct drm_atomic_state *state)
200{
201 int ret;
202
203 ret = drm_atomic_helper_check(dev, state);
204 if (ret)
205 return ret;
206
207 if (dev->mode_config.normalize_zpos) {
208 ret = omap_atomic_update_normalize_zpos(dev, state);
209 if (ret)
210 return ret;
211 }
212
213 return 0;
214}
215
216static const struct drm_mode_config_helper_funcs omap_mode_config_helper_funcs = {
217 .atomic_commit_tail = omap_atomic_commit_tail,
218};
219
220static const struct drm_mode_config_funcs omap_mode_config_funcs = {
221 .fb_create = omap_framebuffer_create,
222 .atomic_check = omap_atomic_check,
223 .atomic_commit = drm_atomic_helper_commit,
224};
225
226/* Global/shared object state funcs */
227
228/*
229 * This is a helper that returns the private state currently in operation.
230 * Note that this would return the "old_state" if called in the atomic check
231 * path, and the "new_state" after the atomic swap has been done.
232 */
233struct omap_global_state *
234omap_get_existing_global_state(struct omap_drm_private *priv)
235{
236 return to_omap_global_state(priv->glob_obj.state);
237}
238
239/*
240 * This acquires the modeset lock set aside for global state, creates
241 * a new duplicated private object state.
242 */
243struct omap_global_state *__must_check
244omap_get_global_state(struct drm_atomic_state *s)
245{
246 struct omap_drm_private *priv = s->dev->dev_private;
247 struct drm_private_state *priv_state;
248
249 priv_state = drm_atomic_get_private_obj_state(state: s, obj: &priv->glob_obj);
250 if (IS_ERR(ptr: priv_state))
251 return ERR_CAST(ptr: priv_state);
252
253 return to_omap_global_state(priv_state);
254}
255
256static struct drm_private_state *
257omap_global_duplicate_state(struct drm_private_obj *obj)
258{
259 struct omap_global_state *state;
260
261 state = kmemdup(p: obj->state, size: sizeof(*state), GFP_KERNEL);
262 if (!state)
263 return NULL;
264
265 __drm_atomic_helper_private_obj_duplicate_state(obj, state: &state->base);
266
267 return &state->base;
268}
269
270static void omap_global_destroy_state(struct drm_private_obj *obj,
271 struct drm_private_state *state)
272{
273 struct omap_global_state *omap_state = to_omap_global_state(state);
274
275 kfree(objp: omap_state);
276}
277
278static const struct drm_private_state_funcs omap_global_state_funcs = {
279 .atomic_duplicate_state = omap_global_duplicate_state,
280 .atomic_destroy_state = omap_global_destroy_state,
281};
282
283static int omap_global_obj_init(struct drm_device *dev)
284{
285 struct omap_drm_private *priv = dev->dev_private;
286 struct omap_global_state *state;
287
288 state = kzalloc(size: sizeof(*state), GFP_KERNEL);
289 if (!state)
290 return -ENOMEM;
291
292 drm_atomic_private_obj_init(dev, obj: &priv->glob_obj, state: &state->base,
293 funcs: &omap_global_state_funcs);
294 return 0;
295}
296
297static void omap_global_obj_fini(struct omap_drm_private *priv)
298{
299 drm_atomic_private_obj_fini(obj: &priv->glob_obj);
300}
301
302static void omap_disconnect_pipelines(struct drm_device *ddev)
303{
304 struct omap_drm_private *priv = ddev->dev_private;
305 unsigned int i;
306
307 for (i = 0; i < priv->num_pipes; i++) {
308 struct omap_drm_pipeline *pipe = &priv->pipes[i];
309
310 omapdss_device_disconnect(NULL, dst: pipe->output);
311
312 omapdss_device_put(dssdev: pipe->output);
313 pipe->output = NULL;
314 }
315
316 memset(&priv->channels, 0, sizeof(priv->channels));
317
318 priv->num_pipes = 0;
319}
320
321static int omap_connect_pipelines(struct drm_device *ddev)
322{
323 struct omap_drm_private *priv = ddev->dev_private;
324 struct omap_dss_device *output = NULL;
325 int r;
326
327 for_each_dss_output(output) {
328 r = omapdss_device_connect(dss: priv->dss, NULL, dst: output);
329 if (r == -EPROBE_DEFER) {
330 omapdss_device_put(dssdev: output);
331 return r;
332 } else if (r) {
333 dev_warn(output->dev, "could not connect output %s\n",
334 output->name);
335 } else {
336 struct omap_drm_pipeline *pipe;
337
338 pipe = &priv->pipes[priv->num_pipes++];
339 pipe->output = omapdss_device_get(dssdev: output);
340
341 if (priv->num_pipes == ARRAY_SIZE(priv->pipes)) {
342 /* To balance the 'for_each_dss_output' loop */
343 omapdss_device_put(dssdev: output);
344 break;
345 }
346 }
347 }
348
349 return 0;
350}
351
352static int omap_compare_pipelines(const void *a, const void *b)
353{
354 const struct omap_drm_pipeline *pipe1 = a;
355 const struct omap_drm_pipeline *pipe2 = b;
356
357 if (pipe1->alias_id > pipe2->alias_id)
358 return 1;
359 else if (pipe1->alias_id < pipe2->alias_id)
360 return -1;
361 return 0;
362}
363
364static int omap_modeset_init_properties(struct drm_device *dev)
365{
366 struct omap_drm_private *priv = dev->dev_private;
367 unsigned int num_planes = dispc_get_num_ovls(dispc: priv->dispc);
368
369 priv->zorder_prop = drm_property_create_range(dev, flags: 0, name: "zorder", min: 0,
370 max: num_planes - 1);
371 if (!priv->zorder_prop)
372 return -ENOMEM;
373
374 return 0;
375}
376
377static int omap_display_id(struct omap_dss_device *output)
378{
379 struct device_node *node = NULL;
380
381 if (output->bridge) {
382 struct drm_bridge *bridge = output->bridge;
383
384 while (drm_bridge_get_next_bridge(bridge))
385 bridge = drm_bridge_get_next_bridge(bridge);
386
387 node = bridge->of_node;
388 }
389
390 return node ? of_alias_get_id(np: node, stem: "display") : -ENODEV;
391}
392
393static int omap_modeset_init(struct drm_device *dev)
394{
395 struct omap_drm_private *priv = dev->dev_private;
396 int num_ovls = dispc_get_num_ovls(dispc: priv->dispc);
397 int num_mgrs = dispc_get_num_mgrs(dispc: priv->dispc);
398 unsigned int i;
399 int ret;
400 u32 plane_crtc_mask;
401
402 if (!omapdss_stack_is_ready())
403 return -EPROBE_DEFER;
404
405 ret = omap_modeset_init_properties(dev);
406 if (ret < 0)
407 return ret;
408
409 /*
410 * This function creates exactly one connector, encoder, crtc,
411 * and primary plane per each connected dss-device. Each
412 * connector->encoder->crtc chain is expected to be separate
413 * and each crtc is connect to a single dss-channel. If the
414 * configuration does not match the expectations or exceeds
415 * the available resources, the configuration is rejected.
416 */
417 ret = omap_connect_pipelines(ddev: dev);
418 if (ret < 0)
419 return ret;
420
421 if (priv->num_pipes > num_mgrs || priv->num_pipes > num_ovls) {
422 dev_err(dev->dev, "%s(): Too many connected displays\n",
423 __func__);
424 return -EINVAL;
425 }
426
427 /* Create all planes first. They can all be put to any CRTC. */
428 plane_crtc_mask = (1 << priv->num_pipes) - 1;
429
430 for (i = 0; i < num_ovls; i++) {
431 enum drm_plane_type type = i < priv->num_pipes
432 ? DRM_PLANE_TYPE_PRIMARY
433 : DRM_PLANE_TYPE_OVERLAY;
434 struct drm_plane *plane;
435
436 if (WARN_ON(priv->num_planes >= ARRAY_SIZE(priv->planes)))
437 return -EINVAL;
438
439 plane = omap_plane_init(dev, idx: i, type, possible_crtcs: plane_crtc_mask);
440 if (IS_ERR(ptr: plane))
441 return PTR_ERR(ptr: plane);
442
443 priv->planes[priv->num_planes++] = plane;
444 }
445
446 /*
447 * Create the encoders, attach the bridges and get the pipeline alias
448 * IDs.
449 */
450 for (i = 0; i < priv->num_pipes; i++) {
451 struct omap_drm_pipeline *pipe = &priv->pipes[i];
452 int id;
453
454 pipe->encoder = omap_encoder_init(dev, output: pipe->output);
455 if (!pipe->encoder)
456 return -ENOMEM;
457
458 if (pipe->output->bridge) {
459 ret = drm_bridge_attach(encoder: pipe->encoder,
460 bridge: pipe->output->bridge, NULL,
461 flags: DRM_BRIDGE_ATTACH_NO_CONNECTOR);
462 if (ret < 0)
463 return ret;
464 }
465
466 id = omap_display_id(output: pipe->output);
467 pipe->alias_id = id >= 0 ? id : i;
468 }
469
470 /* Sort the pipelines by DT aliases. */
471 sort(base: priv->pipes, num: priv->num_pipes, size: sizeof(priv->pipes[0]),
472 cmp_func: omap_compare_pipelines, NULL);
473
474 /*
475 * Populate the pipeline lookup table by DISPC channel. Only one display
476 * is allowed per channel.
477 */
478 for (i = 0; i < priv->num_pipes; ++i) {
479 struct omap_drm_pipeline *pipe = &priv->pipes[i];
480 enum omap_channel channel = pipe->output->dispc_channel;
481
482 if (WARN_ON(priv->channels[channel] != NULL))
483 return -EINVAL;
484
485 priv->channels[channel] = pipe;
486 }
487
488 /* Create the connectors and CRTCs. */
489 for (i = 0; i < priv->num_pipes; i++) {
490 struct omap_drm_pipeline *pipe = &priv->pipes[i];
491 struct drm_encoder *encoder = pipe->encoder;
492 struct drm_crtc *crtc;
493
494 pipe->connector = drm_bridge_connector_init(drm: dev, encoder);
495 if (IS_ERR(ptr: pipe->connector)) {
496 dev_err(priv->dev,
497 "unable to create bridge connector for %s\n",
498 pipe->output->name);
499 return PTR_ERR(ptr: pipe->connector);
500 }
501
502 drm_connector_attach_encoder(connector: pipe->connector, encoder);
503
504 crtc = omap_crtc_init(dev, pipe, plane: priv->planes[i]);
505 if (IS_ERR(ptr: crtc))
506 return PTR_ERR(ptr: crtc);
507
508 encoder->possible_crtcs = 1 << i;
509 pipe->crtc = crtc;
510 }
511
512 DBG("registered %u planes, %u crtcs/encoders/connectors\n",
513 priv->num_planes, priv->num_pipes);
514
515 dev->mode_config.min_width = 8;
516 dev->mode_config.min_height = 2;
517
518 /*
519 * Note: these values are used for multiple independent things:
520 * connector mode filtering, buffer sizes, crtc sizes...
521 * Use big enough values here to cover all use cases, and do more
522 * specific checking in the respective code paths.
523 */
524 dev->mode_config.max_width = 8192;
525 dev->mode_config.max_height = 8192;
526
527 /* We want the zpos to be normalized */
528 dev->mode_config.normalize_zpos = true;
529
530 dev->mode_config.funcs = &omap_mode_config_funcs;
531 dev->mode_config.helper_private = &omap_mode_config_helper_funcs;
532
533 drm_mode_config_reset(dev);
534
535 omap_drm_irq_install(dev);
536
537 return 0;
538}
539
540static void omap_modeset_fini(struct drm_device *ddev)
541{
542 omap_drm_irq_uninstall(dev: ddev);
543
544 drm_mode_config_cleanup(dev: ddev);
545}
546
547/*
548 * drm ioctl funcs
549 */
550
551
552static int ioctl_get_param(struct drm_device *dev, void *data,
553 struct drm_file *file_priv)
554{
555 struct omap_drm_private *priv = dev->dev_private;
556 struct drm_omap_param *args = data;
557
558 DBG("%p: param=%llu", dev, args->param);
559
560 switch (args->param) {
561 case OMAP_PARAM_CHIPSET_ID:
562 args->value = priv->omaprev;
563 break;
564 default:
565 DBG("unknown parameter %lld", args->param);
566 return -EINVAL;
567 }
568
569 return 0;
570}
571
572#define OMAP_BO_USER_MASK 0x00ffffff /* flags settable by userspace */
573
574static int ioctl_gem_new(struct drm_device *dev, void *data,
575 struct drm_file *file_priv)
576{
577 struct drm_omap_gem_new *args = data;
578 u32 flags = args->flags & OMAP_BO_USER_MASK;
579
580 VERB("%p:%p: size=0x%08x, flags=%08x", dev, file_priv,
581 args->size.bytes, flags);
582
583 return omap_gem_new_handle(dev, file: file_priv, gsize: args->size, flags,
584 handle: &args->handle);
585}
586
587static int ioctl_gem_info(struct drm_device *dev, void *data,
588 struct drm_file *file_priv)
589{
590 struct drm_omap_gem_info *args = data;
591 struct drm_gem_object *obj;
592 int ret = 0;
593
594 VERB("%p:%p: handle=%d", dev, file_priv, args->handle);
595
596 obj = drm_gem_object_lookup(filp: file_priv, handle: args->handle);
597 if (!obj)
598 return -ENOENT;
599
600 args->size = omap_gem_mmap_size(obj);
601 args->offset = omap_gem_mmap_offset(obj);
602
603 drm_gem_object_put(obj);
604
605 return ret;
606}
607
608static const struct drm_ioctl_desc ioctls[DRM_COMMAND_END - DRM_COMMAND_BASE] = {
609 DRM_IOCTL_DEF_DRV(OMAP_GET_PARAM, ioctl_get_param,
610 DRM_RENDER_ALLOW),
611 DRM_IOCTL_DEF_DRV(OMAP_SET_PARAM, drm_invalid_op,
612 DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY),
613 DRM_IOCTL_DEF_DRV(OMAP_GEM_NEW, ioctl_gem_new,
614 DRM_RENDER_ALLOW),
615 /* Deprecated, to be removed. */
616 DRM_IOCTL_DEF_DRV(OMAP_GEM_CPU_PREP, drm_noop,
617 DRM_RENDER_ALLOW),
618 /* Deprecated, to be removed. */
619 DRM_IOCTL_DEF_DRV(OMAP_GEM_CPU_FINI, drm_noop,
620 DRM_RENDER_ALLOW),
621 DRM_IOCTL_DEF_DRV(OMAP_GEM_INFO, ioctl_gem_info,
622 DRM_RENDER_ALLOW),
623};
624
625/*
626 * drm driver funcs
627 */
628
629static int dev_open(struct drm_device *dev, struct drm_file *file)
630{
631 file->driver_priv = NULL;
632
633 DBG("open: dev=%p, file=%p", dev, file);
634
635 return 0;
636}
637
638DEFINE_DRM_GEM_FOPS(omapdriver_fops);
639
640static const struct drm_driver omap_drm_driver = {
641 .driver_features = DRIVER_MODESET | DRIVER_GEM |
642 DRIVER_ATOMIC | DRIVER_RENDER,
643 .open = dev_open,
644#ifdef CONFIG_DEBUG_FS
645 .debugfs_init = omap_debugfs_init,
646#endif
647 .gem_prime_import = omap_gem_prime_import,
648 .dumb_create = omap_gem_dumb_create,
649 .dumb_map_offset = omap_gem_dumb_map_offset,
650 .ioctls = ioctls,
651 .num_ioctls = DRM_OMAP_NUM_IOCTLS,
652 .fops = &omapdriver_fops,
653 .name = DRIVER_NAME,
654 .desc = DRIVER_DESC,
655 .date = DRIVER_DATE,
656 .major = DRIVER_MAJOR,
657 .minor = DRIVER_MINOR,
658 .patchlevel = DRIVER_PATCHLEVEL,
659};
660
661static const struct soc_device_attribute omapdrm_soc_devices[] = {
662 { .family = "OMAP3", .data = (void *)0x3430 },
663 { .family = "OMAP4", .data = (void *)0x4430 },
664 { .family = "OMAP5", .data = (void *)0x5430 },
665 { .family = "DRA7", .data = (void *)0x0752 },
666 { /* sentinel */ }
667};
668
669static int omapdrm_init(struct omap_drm_private *priv, struct device *dev)
670{
671 const struct soc_device_attribute *soc;
672 struct dss_pdata *pdata = dev->platform_data;
673 struct drm_device *ddev;
674 int ret;
675
676 DBG("%s", dev_name(dev));
677
678 if (drm_firmware_drivers_only())
679 return -ENODEV;
680
681 /* Allocate and initialize the DRM device. */
682 ddev = drm_dev_alloc(driver: &omap_drm_driver, parent: dev);
683 if (IS_ERR(ptr: ddev))
684 return PTR_ERR(ptr: ddev);
685
686 priv->ddev = ddev;
687 ddev->dev_private = priv;
688
689 priv->dev = dev;
690 priv->dss = pdata->dss;
691 priv->dispc = dispc_get_dispc(dss: priv->dss);
692
693 priv->dss->mgr_ops_priv = priv;
694
695 soc = soc_device_match(matches: omapdrm_soc_devices);
696 priv->omaprev = soc ? (uintptr_t)soc->data : 0;
697 priv->wq = alloc_ordered_workqueue("omapdrm", 0);
698
699 mutex_init(&priv->list_lock);
700 INIT_LIST_HEAD(list: &priv->obj_list);
701
702 /* Get memory bandwidth limits */
703 priv->max_bandwidth = dispc_get_memory_bandwidth_limit(dispc: priv->dispc);
704
705 omap_gem_init(dev: ddev);
706
707 drm_mode_config_init(dev: ddev);
708
709 ret = omap_global_obj_init(dev: ddev);
710 if (ret)
711 goto err_gem_deinit;
712
713 ret = omap_hwoverlays_init(priv);
714 if (ret)
715 goto err_free_priv_obj;
716
717 ret = omap_modeset_init(dev: ddev);
718 if (ret) {
719 dev_err(priv->dev, "omap_modeset_init failed: ret=%d\n", ret);
720 goto err_free_overlays;
721 }
722
723 /* Initialize vblank handling, start with all CRTCs disabled. */
724 ret = drm_vblank_init(dev: ddev, num_crtcs: priv->num_pipes);
725 if (ret) {
726 dev_err(priv->dev, "could not init vblank\n");
727 goto err_cleanup_modeset;
728 }
729
730 drm_kms_helper_poll_init(dev: ddev);
731
732 /*
733 * Register the DRM device with the core and the connectors with
734 * sysfs.
735 */
736 ret = drm_dev_register(dev: ddev, flags: 0);
737 if (ret)
738 goto err_cleanup_helpers;
739
740 omap_fbdev_setup(dev: ddev);
741
742 return 0;
743
744err_cleanup_helpers:
745 drm_kms_helper_poll_fini(dev: ddev);
746err_cleanup_modeset:
747 omap_modeset_fini(ddev);
748err_free_overlays:
749 omap_hwoverlays_destroy(priv);
750err_free_priv_obj:
751 omap_global_obj_fini(priv);
752err_gem_deinit:
753 drm_mode_config_cleanup(dev: ddev);
754 omap_gem_deinit(dev: ddev);
755 destroy_workqueue(wq: priv->wq);
756 omap_disconnect_pipelines(ddev);
757 drm_dev_put(dev: ddev);
758 return ret;
759}
760
761static void omapdrm_cleanup(struct omap_drm_private *priv)
762{
763 struct drm_device *ddev = priv->ddev;
764
765 DBG("");
766
767 drm_dev_unregister(dev: ddev);
768
769 drm_kms_helper_poll_fini(dev: ddev);
770
771 drm_atomic_helper_shutdown(dev: ddev);
772
773 omap_modeset_fini(ddev);
774 omap_hwoverlays_destroy(priv);
775 omap_global_obj_fini(priv);
776 drm_mode_config_cleanup(dev: ddev);
777 omap_gem_deinit(dev: ddev);
778
779 destroy_workqueue(wq: priv->wq);
780
781 omap_disconnect_pipelines(ddev);
782
783 drm_dev_put(dev: ddev);
784}
785
786static int pdev_probe(struct platform_device *pdev)
787{
788 struct omap_drm_private *priv;
789 int ret;
790
791 ret = dma_coerce_mask_and_coherent(dev: &pdev->dev, DMA_BIT_MASK(32));
792 if (ret) {
793 dev_err(&pdev->dev, "Failed to set the DMA mask\n");
794 return ret;
795 }
796
797 /* Allocate and initialize the driver private structure. */
798 priv = kzalloc(size: sizeof(*priv), GFP_KERNEL);
799 if (!priv)
800 return -ENOMEM;
801
802 platform_set_drvdata(pdev, data: priv);
803
804 ret = omapdrm_init(priv, dev: &pdev->dev);
805 if (ret < 0)
806 kfree(objp: priv);
807
808 return ret;
809}
810
811static void pdev_remove(struct platform_device *pdev)
812{
813 struct omap_drm_private *priv = platform_get_drvdata(pdev);
814
815 omapdrm_cleanup(priv);
816 kfree(objp: priv);
817}
818
819static void pdev_shutdown(struct platform_device *pdev)
820{
821 struct omap_drm_private *priv = platform_get_drvdata(pdev);
822
823 drm_atomic_helper_shutdown(dev: priv->ddev);
824}
825
826#ifdef CONFIG_PM_SLEEP
827static int omap_drm_suspend(struct device *dev)
828{
829 struct omap_drm_private *priv = dev_get_drvdata(dev);
830 struct drm_device *drm_dev = priv->ddev;
831
832 return drm_mode_config_helper_suspend(dev: drm_dev);
833}
834
835static int omap_drm_resume(struct device *dev)
836{
837 struct omap_drm_private *priv = dev_get_drvdata(dev);
838 struct drm_device *drm_dev = priv->ddev;
839
840 drm_mode_config_helper_resume(dev: drm_dev);
841
842 return omap_gem_resume(dev: drm_dev);
843}
844#endif
845
846static SIMPLE_DEV_PM_OPS(omapdrm_pm_ops, omap_drm_suspend, omap_drm_resume);
847
848static struct platform_driver pdev = {
849 .driver = {
850 .name = "omapdrm",
851 .pm = &omapdrm_pm_ops,
852 },
853 .probe = pdev_probe,
854 .remove_new = pdev_remove,
855 .shutdown = pdev_shutdown,
856};
857
858static struct platform_driver * const drivers[] = {
859 &omap_dmm_driver,
860 &pdev,
861};
862
863static int __init omap_drm_init(void)
864{
865 int r;
866
867 DBG("init");
868
869 r = omap_dss_init();
870 if (r)
871 return r;
872
873 r = platform_register_drivers(drivers, ARRAY_SIZE(drivers));
874 if (r) {
875 omap_dss_exit();
876 return r;
877 }
878
879 return 0;
880}
881
882static void __exit omap_drm_fini(void)
883{
884 DBG("fini");
885
886 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
887
888 omap_dss_exit();
889}
890
891module_init(omap_drm_init);
892module_exit(omap_drm_fini);
893
894MODULE_AUTHOR("Rob Clark <rob@ti.com>");
895MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
896MODULE_DESCRIPTION("OMAP DRM Display Driver");
897MODULE_ALIAS("platform:" DRIVER_NAME);
898MODULE_LICENSE("GPL v2");
899

source code of linux/drivers/gpu/drm/omapdrm/omap_drv.c