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