1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
|
/*
* Freescale i.MX drm driver
*
* Copyright (C) 2011 Sascha Hauer, Pengutronix
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/component.h>
#include <linux/device.h>
#include <linux/fb.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <drm/drmP.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_plane_helper.h>
#include <drm/drm_of.h>
#include <video/imx-ipu-v3.h>
#include "imx-drm.h"
#define MAX_CRTC 4
struct imx_drm_component {
struct device_node *of_node;
struct list_head list;
};
struct imx_drm_device {
struct drm_device *drm;
struct imx_drm_crtc *crtc[MAX_CRTC];
unsigned int pipes;
struct drm_fbdev_cma *fbhelper;
};
struct imx_drm_crtc {
struct drm_crtc *crtc;
struct imx_drm_crtc_helper_funcs imx_drm_helper_funcs;
};
#if IS_ENABLED(CONFIG_DRM_FBDEV_EMULATION)
static int legacyfb_depth = 16;
module_param(legacyfb_depth, int, 0444);
#endif
unsigned int imx_drm_crtc_id(struct imx_drm_crtc *crtc)
{
return drm_crtc_index(crtc->crtc);
}
EXPORT_SYMBOL_GPL(imx_drm_crtc_id);
static void imx_drm_driver_lastclose(struct drm_device *drm)
{
struct imx_drm_device *imxdrm = drm->dev_private;
drm_fbdev_cma_restore_mode(imxdrm->fbhelper);
}
static int imx_drm_driver_unload(struct drm_device *drm)
{
struct imx_drm_device *imxdrm = drm->dev_private;
drm_kms_helper_poll_fini(drm);
if (imxdrm->fbhelper)
drm_fbdev_cma_fini(imxdrm->fbhelper);
component_unbind_all(drm->dev, drm);
drm_vblank_cleanup(drm);
drm_mode_config_cleanup(drm);
platform_set_drvdata(drm->platformdev, NULL);
return 0;
}
static struct imx_drm_crtc *imx_drm_find_crtc(struct drm_crtc *crtc)
{
struct imx_drm_device *imxdrm = crtc->dev->dev_private;
unsigned i;
for (i = 0; i < MAX_CRTC; i++)
if (imxdrm->crtc[i] && imxdrm->crtc[i]->crtc == crtc)
return imxdrm->crtc[i];
return NULL;
}
int imx_drm_set_bus_config(struct drm_encoder *encoder, u32 bus_format,
int hsync_pin, int vsync_pin, u32 bus_flags)
{
struct imx_drm_crtc_helper_funcs *helper;
struct imx_drm_crtc *imx_crtc;
imx_crtc = imx_drm_find_crtc(encoder->crtc);
if (!imx_crtc)
return -EINVAL;
helper = &imx_crtc->imx_drm_helper_funcs;
if (helper->set_interface_pix_fmt)
return helper->set_interface_pix_fmt(encoder->crtc,
bus_format, hsync_pin, vsync_pin,
bus_flags);
return 0;
}
EXPORT_SYMBOL_GPL(imx_drm_set_bus_config);
int imx_drm_set_bus_format(struct drm_encoder *encoder, u32 bus_format)
{
return imx_drm_set_bus_config(encoder, bus_format, 2, 3,
DRM_BUS_FLAG_DE_HIGH |
DRM_BUS_FLAG_PIXDATA_NEGEDGE);
}
EXPORT_SYMBOL_GPL(imx_drm_set_bus_format);
int imx_drm_crtc_vblank_get(struct imx_drm_crtc *imx_drm_crtc)
{
return drm_crtc_vblank_get(imx_drm_crtc->crtc);
}
EXPORT_SYMBOL_GPL(imx_drm_crtc_vblank_get);
void imx_drm_crtc_vblank_put(struct imx_drm_crtc *imx_drm_crtc)
{
drm_crtc_vblank_put(imx_drm_crtc->crtc);
}
EXPORT_SYMBOL_GPL(imx_drm_crtc_vblank_put);
void imx_drm_handle_vblank(struct imx_drm_crtc *imx_drm_crtc)
{
drm_crtc_handle_vblank(imx_drm_crtc->crtc);
}
EXPORT_SYMBOL_GPL(imx_drm_handle_vblank);
static int imx_drm_enable_vblank(struct drm_device *drm, unsigned int pipe)
{
struct imx_drm_device *imxdrm = drm->dev_private;
struct imx_drm_crtc *imx_drm_crtc = imxdrm->crtc[pipe];
int ret;
if (!imx_drm_crtc)
return -EINVAL;
if (!imx_drm_crtc->imx_drm_helper_funcs.enable_vblank)
return -ENOSYS;
ret = imx_drm_crtc->imx_drm_helper_funcs.enable_vblank(
imx_drm_crtc->crtc);
return ret;
}
static void imx_drm_disable_vblank(struct drm_device *drm, unsigned int pipe)
{
struct imx_drm_device *imxdrm = drm->dev_private;
struct imx_drm_crtc *imx_drm_crtc = imxdrm->crtc[pipe];
if (!imx_drm_crtc)
return;
if (!imx_drm_crtc->imx_drm_helper_funcs.disable_vblank)
return;
imx_drm_crtc->imx_drm_helper_funcs.disable_vblank(imx_drm_crtc->crtc);
}
static const struct file_operations imx_drm_driver_fops = {
.owner = THIS_MODULE,
.open = drm_open,
.release = drm_release,
.unlocked_ioctl = drm_ioctl,
.mmap = drm_gem_cma_mmap,
.poll = drm_poll,
.read = drm_read,
.llseek = noop_llseek,
};
void imx_drm_connector_destroy(struct drm_connector *connector)
{
drm_connector_unregister(connector);
drm_connector_cleanup(connector);
}
EXPORT_SYMBOL_GPL(imx_drm_connector_destroy);
void imx_drm_encoder_destroy(struct drm_encoder *encoder)
{
drm_encoder_cleanup(encoder);
}
EXPORT_SYMBOL_GPL(imx_drm_encoder_destroy);
static void imx_drm_output_poll_changed(struct drm_device *drm)
{
struct imx_drm_device *imxdrm = drm->dev_private;
drm_fbdev_cma_hotplug_event(imxdrm->fbhelper);
}
static const struct drm_mode_config_funcs imx_drm_mode_config_funcs = {
.fb_create = drm_fb_cma_create,
.output_poll_changed = imx_drm_output_poll_changed,
};
/*
* Main DRM initialisation. This binds, initialises and registers
* with DRM the subcomponents of the driver.
*/
static int imx_drm_driver_load(struct drm_device *drm, unsigned long flags)
{
struct imx_drm_device *imxdrm;
struct drm_connector *connector;
int ret;
imxdrm = devm_kzalloc(drm->dev, sizeof(*imxdrm), GFP_KERNEL);
if (!imxdrm)
return -ENOMEM;
imxdrm->drm = drm;
drm->dev_private = imxdrm;
/*
* enable drm irq mode.
* - with irq_enabled = true, we can use the vblank feature.
*
* P.S. note that we wouldn't use drm irq handler but
* just specific driver own one instead because
* drm framework supports only one irq handler and
* drivers can well take care of their interrupts
*/
drm->irq_enabled = true;
/*
* set max width and height as default value(4096x4096).
* this value would be used to check framebuffer size limitation
* at drm_mode_addfb().
*/
drm->mode_config.min_width = 64;
drm->mode_config.min_height = 64;
drm->mode_config.max_width = 4096;
drm->mode_config.max_height = 4096;
drm->mode_config.funcs = &imx_drm_mode_config_funcs;
drm_mode_config_init(drm);
ret = drm_vblank_init(drm, MAX_CRTC);
if (ret)
goto err_kms;
platform_set_drvdata(drm->platformdev, drm);
/* Now try and bind all our sub-components */
ret = component_bind_all(drm->dev, drm);
if (ret)
goto err_vblank;
/*
* All components are now added, we can publish the connector sysfs
* entries to userspace. This will generate hotplug events and so
* userspace will expect to be able to access DRM at this point.
*/
list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
ret = drm_connector_register(connector);
if (ret) {
dev_err(drm->dev,
"[CONNECTOR:%d:%s] drm_connector_register failed: %d\n",
connector->base.id,
connector->name, ret);
goto err_unbind;
}
}
drm_mode_config_reset(drm);
/*
* All components are now initialised, so setup the fb helper.
* The fb helper takes copies of key hardware information, so the
* crtcs/connectors/encoders must not change after this point.
*/
#if IS_ENABLED(CONFIG_DRM_FBDEV_EMULATION)
if (legacyfb_depth != 16 && legacyfb_depth != 32) {
dev_warn(drm->dev, "Invalid legacyfb_depth. Defaulting to 16bpp\n");
legacyfb_depth = 16;
}
drm_helper_disable_unused_functions(drm);
imxdrm->fbhelper = drm_fbdev_cma_init(drm, legacyfb_depth,
drm->mode_config.num_crtc, MAX_CRTC);
if (IS_ERR(imxdrm->fbhelper)) {
ret = PTR_ERR(imxdrm->fbhelper);
imxdrm->fbhelper = NULL;
goto err_unbind;
}
#endif
drm_kms_helper_poll_init(drm);
return 0;
err_unbind:
component_unbind_all(drm->dev, drm);
err_vblank:
drm_vblank_cleanup(drm);
err_kms:
drm_mode_config_cleanup(drm);
return ret;
}
/*
* imx_drm_add_crtc - add a new crtc
*/
int imx_drm_add_crtc(struct drm_device *drm, struct drm_crtc *crtc,
struct imx_drm_crtc **new_crtc, struct drm_plane *primary_plane,
const struct imx_drm_crtc_helper_funcs *imx_drm_helper_funcs,
struct device_node *port)
{
struct imx_drm_device *imxdrm = drm->dev_private;
struct imx_drm_crtc *imx_drm_crtc;
/*
* The vblank arrays are dimensioned by MAX_CRTC - we can't
* pass IDs greater than this to those functions.
*/
if (imxdrm->pipes >= MAX_CRTC)
return -EINVAL;
if (imxdrm->drm->open_count)
return -EBUSY;
imx_drm_crtc = kzalloc(sizeof(*imx_drm_crtc), GFP_KERNEL);
if (!imx_drm_crtc)
return -ENOMEM;
imx_drm_crtc->imx_drm_helper_funcs = *imx_drm_helper_funcs;
imx_drm_crtc->crtc = crtc;
crtc->port = port;
imxdrm->crtc[imxdrm->pipes++] = imx_drm_crtc;
*new_crtc = imx_drm_crtc;
drm_crtc_helper_add(crtc,
imx_drm_crtc->imx_drm_helper_funcs.crtc_helper_funcs);
drm_crtc_init_with_planes(drm, crtc, primary_plane, NULL,
imx_drm_crtc->imx_drm_helper_funcs.crtc_funcs, NULL);
return 0;
}
EXPORT_SYMBOL_GPL(imx_drm_add_crtc);
/*
* imx_drm_remove_crtc - remove a crtc
*/
int imx_drm_remove_crtc(struct imx_drm_crtc *imx_drm_crtc)
{
struct imx_drm_device *imxdrm = imx_drm_crtc->crtc->dev->dev_private;
unsigned int pipe = drm_crtc_index(imx_drm_crtc->crtc);
drm_crtc_cleanup(imx_drm_crtc->crtc);
imxdrm->crtc[pipe] = NULL;
kfree(imx_drm_crtc);
return 0;
}
EXPORT_SYMBOL_GPL(imx_drm_remove_crtc);
int imx_drm_encoder_parse_of(struct drm_device *drm,
struct drm_encoder *encoder, struct device_node *np)
{
uint32_t crtc_mask = drm_of_find_possible_crtcs(drm, np);
/*
* If we failed to find the CRTC(s) which this encoder is
* supposed to be connected to, it's because the CRTC has
* not been registered yet. Defer probing, and hope that
* the required CRTC is added later.
*/
if (crtc_mask == 0)
return -EPROBE_DEFER;
encoder->possible_crtcs = crtc_mask;
/* FIXME: this is the mask of outputs which can clone this output. */
encoder->possible_clones = ~0;
return 0;
}
EXPORT_SYMBOL_GPL(imx_drm_encoder_parse_of);
static const struct drm_ioctl_desc imx_drm_ioctls[] = {
/* none so far */
};
static struct drm_driver imx_drm_driver = {
.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
.load = imx_drm_driver_load,
.unload = imx_drm_driver_unload,
.lastclose = imx_drm_driver_lastclose,
.gem_free_object_unlocked = drm_gem_cma_free_object,
.gem_vm_ops = &drm_gem_cma_vm_ops,
.dumb_create = drm_gem_cma_dumb_create,
.dumb_map_offset = drm_gem_cma_dumb_map_offset,
.dumb_destroy = drm_gem_dumb_destroy,
.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
.gem_prime_import = drm_gem_prime_import,
.gem_prime_export = drm_gem_prime_export,
.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
.gem_prime_vmap = drm_gem_cma_prime_vmap,
.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
.gem_prime_mmap = drm_gem_cma_prime_mmap,
.get_vblank_counter = drm_vblank_no_hw_counter,
.enable_vblank = imx_drm_enable_vblank,
.disable_vblank = imx_drm_disable_vblank,
.ioctls = imx_drm_ioctls,
.num_ioctls = ARRAY_SIZE(imx_drm_ioctls),
.fops = &imx_drm_driver_fops,
.name = "imx-drm",
.desc = "i.MX DRM graphics",
.date = "20120507",
.major = 1,
.minor = 0,
.patchlevel = 0,
};
static int compare_of(struct device *dev, void *data)
{
struct device_node *np = data;
/* Special case for DI, dev->of_node may not be set yet */
if (strcmp(dev->driver->name, "imx-ipuv3-crtc") == 0) {
struct ipu_client_platformdata *pdata = dev->platform_data;
return pdata->of_node == np;
}
/* Special case for LDB, one device for two channels */
if (of_node_cmp(np->name, "lvds-channel") == 0) {
np = of_get_parent(np);
of_node_put(np);
}
return dev->of_node == np;
}
static int imx_drm_bind(struct device *dev)
{
return drm_platform_init(&imx_drm_driver, to_platform_device(dev));
}
static void imx_drm_unbind(struct device *dev)
{
drm_put_dev(dev_get_drvdata(dev));
}
static const struct component_master_ops imx_drm_ops = {
.bind = imx_drm_bind,
.unbind = imx_drm_unbind,
};
static int imx_drm_platform_probe(struct platform_device *pdev)
{
int ret = drm_of_component_probe(&pdev->dev, compare_of, &imx_drm_ops);
if (!ret)
ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
return ret;
}
static int imx_drm_platform_remove(struct platform_device *pdev)
{
component_master_del(&pdev->dev, &imx_drm_ops);
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int imx_drm_suspend(struct device *dev)
{
struct drm_device *drm_dev = dev_get_drvdata(dev);
/* The drm_dev is NULL before .load hook is called */
if (drm_dev == NULL)
return 0;
drm_kms_helper_poll_disable(drm_dev);
return 0;
}
static int imx_drm_resume(struct device *dev)
{
struct drm_device *drm_dev = dev_get_drvdata(dev);
if (drm_dev == NULL)
return 0;
drm_helper_resume_force_mode(drm_dev);
drm_kms_helper_poll_enable(drm_dev);
return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(imx_drm_pm_ops, imx_drm_suspend, imx_drm_resume);
static const struct of_device_id imx_drm_dt_ids[] = {
{ .compatible = "fsl,imx-display-subsystem", },
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, imx_drm_dt_ids);
static struct platform_driver imx_drm_pdrv = {
.probe = imx_drm_platform_probe,
.remove = imx_drm_platform_remove,
.driver = {
.name = "imx-drm",
.pm = &imx_drm_pm_ops,
.of_match_table = imx_drm_dt_ids,
},
};
module_platform_driver(imx_drm_pdrv);
MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
MODULE_DESCRIPTION("i.MX drm driver core");
MODULE_LICENSE("GPL");
|