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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2014 Traphandler
4 * Copyright (C) 2014 Free Electrons
5 * Copyright (C) 2014 Atmel
6 *
7 * Author: Jean-Jacques Hiblot <jjhiblot@traphandler.com>
8 * Author: Boris BREZILLON <boris.brezillon@free-electrons.com>
9 */
10
11#include <linux/clk.h>
12#include <linux/irq.h>
13#include <linux/irqchip.h>
14#include <linux/mfd/atmel-hlcdc.h>
15#include <linux/module.h>
16#include <linux/pm_runtime.h>
17#include <linux/platform_device.h>
18
19#include <drm/drm_atomic.h>
20#include <drm/drm_atomic_helper.h>
21#include <drm/drm_drv.h>
22#include <drm/drm_fb_helper.h>
23#include <drm/drm_gem_cma_helper.h>
24#include <drm/drm_gem_framebuffer_helper.h>
25#include <drm/drm_irq.h>
26#include <drm/drm_probe_helper.h>
27#include <drm/drm_vblank.h>
28
29#include "atmel_hlcdc_dc.h"
30
31#define ATMEL_HLCDC_LAYER_IRQS_OFFSET 8
32
33static const struct atmel_hlcdc_layer_desc atmel_hlcdc_at91sam9n12_layers[] = {
34 {
35 .name = "base",
36 .formats = &atmel_hlcdc_plane_rgb_formats,
37 .regs_offset = 0x40,
38 .id = 0,
39 .type = ATMEL_HLCDC_BASE_LAYER,
40 .cfgs_offset = 0x2c,
41 .layout = {
42 .xstride = { 2 },
43 .default_color = 3,
44 .general_config = 4,
45 },
46 .clut_offset = 0x400,
47 },
48};
49
50static const struct atmel_hlcdc_dc_desc atmel_hlcdc_dc_at91sam9n12 = {
51 .min_width = 0,
52 .min_height = 0,
53 .max_width = 1280,
54 .max_height = 860,
55 .max_spw = 0x3f,
56 .max_vpw = 0x3f,
57 .max_hpw = 0xff,
58 .conflicting_output_formats = true,
59 .nlayers = ARRAY_SIZE(atmel_hlcdc_at91sam9n12_layers),
60 .layers = atmel_hlcdc_at91sam9n12_layers,
61};
62
63static const struct atmel_hlcdc_layer_desc atmel_hlcdc_at91sam9x5_layers[] = {
64 {
65 .name = "base",
66 .formats = &atmel_hlcdc_plane_rgb_formats,
67 .regs_offset = 0x40,
68 .id = 0,
69 .type = ATMEL_HLCDC_BASE_LAYER,
70 .cfgs_offset = 0x2c,
71 .layout = {
72 .xstride = { 2 },
73 .default_color = 3,
74 .general_config = 4,
75 .disc_pos = 5,
76 .disc_size = 6,
77 },
78 .clut_offset = 0x400,
79 },
80 {
81 .name = "overlay1",
82 .formats = &atmel_hlcdc_plane_rgb_formats,
83 .regs_offset = 0x100,
84 .id = 1,
85 .type = ATMEL_HLCDC_OVERLAY_LAYER,
86 .cfgs_offset = 0x2c,
87 .layout = {
88 .pos = 2,
89 .size = 3,
90 .xstride = { 4 },
91 .pstride = { 5 },
92 .default_color = 6,
93 .chroma_key = 7,
94 .chroma_key_mask = 8,
95 .general_config = 9,
96 },
97 .clut_offset = 0x800,
98 },
99 {
100 .name = "high-end-overlay",
101 .formats = &atmel_hlcdc_plane_rgb_and_yuv_formats,
102 .regs_offset = 0x280,
103 .id = 2,
104 .type = ATMEL_HLCDC_OVERLAY_LAYER,
105 .cfgs_offset = 0x4c,
106 .layout = {
107 .pos = 2,
108 .size = 3,
109 .memsize = 4,
110 .xstride = { 5, 7 },
111 .pstride = { 6, 8 },
112 .default_color = 9,
113 .chroma_key = 10,
114 .chroma_key_mask = 11,
115 .general_config = 12,
116 .scaler_config = 13,
117 .csc = 14,
118 },
119 .clut_offset = 0x1000,
120 },
121 {
122 .name = "cursor",
123 .formats = &atmel_hlcdc_plane_rgb_formats,
124 .regs_offset = 0x340,
125 .id = 3,
126 .type = ATMEL_HLCDC_CURSOR_LAYER,
127 .max_width = 128,
128 .max_height = 128,
129 .cfgs_offset = 0x2c,
130 .layout = {
131 .pos = 2,
132 .size = 3,
133 .xstride = { 4 },
134 .default_color = 6,
135 .chroma_key = 7,
136 .chroma_key_mask = 8,
137 .general_config = 9,
138 },
139 .clut_offset = 0x1400,
140 },
141};
142
143static const struct atmel_hlcdc_dc_desc atmel_hlcdc_dc_at91sam9x5 = {
144 .min_width = 0,
145 .min_height = 0,
146 .max_width = 800,
147 .max_height = 600,
148 .max_spw = 0x3f,
149 .max_vpw = 0x3f,
150 .max_hpw = 0xff,
151 .conflicting_output_formats = true,
152 .nlayers = ARRAY_SIZE(atmel_hlcdc_at91sam9x5_layers),
153 .layers = atmel_hlcdc_at91sam9x5_layers,
154};
155
156static const struct atmel_hlcdc_layer_desc atmel_hlcdc_sama5d3_layers[] = {
157 {
158 .name = "base",
159 .formats = &atmel_hlcdc_plane_rgb_formats,
160 .regs_offset = 0x40,
161 .id = 0,
162 .type = ATMEL_HLCDC_BASE_LAYER,
163 .cfgs_offset = 0x2c,
164 .layout = {
165 .xstride = { 2 },
166 .default_color = 3,
167 .general_config = 4,
168 .disc_pos = 5,
169 .disc_size = 6,
170 },
171 .clut_offset = 0x600,
172 },
173 {
174 .name = "overlay1",
175 .formats = &atmel_hlcdc_plane_rgb_formats,
176 .regs_offset = 0x140,
177 .id = 1,
178 .type = ATMEL_HLCDC_OVERLAY_LAYER,
179 .cfgs_offset = 0x2c,
180 .layout = {
181 .pos = 2,
182 .size = 3,
183 .xstride = { 4 },
184 .pstride = { 5 },
185 .default_color = 6,
186 .chroma_key = 7,
187 .chroma_key_mask = 8,
188 .general_config = 9,
189 },
190 .clut_offset = 0xa00,
191 },
192 {
193 .name = "overlay2",
194 .formats = &atmel_hlcdc_plane_rgb_formats,
195 .regs_offset = 0x240,
196 .id = 2,
197 .type = ATMEL_HLCDC_OVERLAY_LAYER,
198 .cfgs_offset = 0x2c,
199 .layout = {
200 .pos = 2,
201 .size = 3,
202 .xstride = { 4 },
203 .pstride = { 5 },
204 .default_color = 6,
205 .chroma_key = 7,
206 .chroma_key_mask = 8,
207 .general_config = 9,
208 },
209 .clut_offset = 0xe00,
210 },
211 {
212 .name = "high-end-overlay",
213 .formats = &atmel_hlcdc_plane_rgb_and_yuv_formats,
214 .regs_offset = 0x340,
215 .id = 3,
216 .type = ATMEL_HLCDC_OVERLAY_LAYER,
217 .cfgs_offset = 0x4c,
218 .layout = {
219 .pos = 2,
220 .size = 3,
221 .memsize = 4,
222 .xstride = { 5, 7 },
223 .pstride = { 6, 8 },
224 .default_color = 9,
225 .chroma_key = 10,
226 .chroma_key_mask = 11,
227 .general_config = 12,
228 .scaler_config = 13,
229 .phicoeffs = {
230 .x = 17,
231 .y = 33,
232 },
233 .csc = 14,
234 },
235 .clut_offset = 0x1200,
236 },
237 {
238 .name = "cursor",
239 .formats = &atmel_hlcdc_plane_rgb_formats,
240 .regs_offset = 0x440,
241 .id = 4,
242 .type = ATMEL_HLCDC_CURSOR_LAYER,
243 .max_width = 128,
244 .max_height = 128,
245 .cfgs_offset = 0x2c,
246 .layout = {
247 .pos = 2,
248 .size = 3,
249 .xstride = { 4 },
250 .pstride = { 5 },
251 .default_color = 6,
252 .chroma_key = 7,
253 .chroma_key_mask = 8,
254 .general_config = 9,
255 .scaler_config = 13,
256 },
257 .clut_offset = 0x1600,
258 },
259};
260
261static const struct atmel_hlcdc_dc_desc atmel_hlcdc_dc_sama5d3 = {
262 .min_width = 0,
263 .min_height = 0,
264 .max_width = 2048,
265 .max_height = 2048,
266 .max_spw = 0x3f,
267 .max_vpw = 0x3f,
268 .max_hpw = 0x1ff,
269 .conflicting_output_formats = true,
270 .nlayers = ARRAY_SIZE(atmel_hlcdc_sama5d3_layers),
271 .layers = atmel_hlcdc_sama5d3_layers,
272};
273
274static const struct atmel_hlcdc_layer_desc atmel_hlcdc_sama5d4_layers[] = {
275 {
276 .name = "base",
277 .formats = &atmel_hlcdc_plane_rgb_formats,
278 .regs_offset = 0x40,
279 .id = 0,
280 .type = ATMEL_HLCDC_BASE_LAYER,
281 .cfgs_offset = 0x2c,
282 .layout = {
283 .xstride = { 2 },
284 .default_color = 3,
285 .general_config = 4,
286 .disc_pos = 5,
287 .disc_size = 6,
288 },
289 .clut_offset = 0x600,
290 },
291 {
292 .name = "overlay1",
293 .formats = &atmel_hlcdc_plane_rgb_formats,
294 .regs_offset = 0x140,
295 .id = 1,
296 .type = ATMEL_HLCDC_OVERLAY_LAYER,
297 .cfgs_offset = 0x2c,
298 .layout = {
299 .pos = 2,
300 .size = 3,
301 .xstride = { 4 },
302 .pstride = { 5 },
303 .default_color = 6,
304 .chroma_key = 7,
305 .chroma_key_mask = 8,
306 .general_config = 9,
307 },
308 .clut_offset = 0xa00,
309 },
310 {
311 .name = "overlay2",
312 .formats = &atmel_hlcdc_plane_rgb_formats,
313 .regs_offset = 0x240,
314 .id = 2,
315 .type = ATMEL_HLCDC_OVERLAY_LAYER,
316 .cfgs_offset = 0x2c,
317 .layout = {
318 .pos = 2,
319 .size = 3,
320 .xstride = { 4 },
321 .pstride = { 5 },
322 .default_color = 6,
323 .chroma_key = 7,
324 .chroma_key_mask = 8,
325 .general_config = 9,
326 },
327 .clut_offset = 0xe00,
328 },
329 {
330 .name = "high-end-overlay",
331 .formats = &atmel_hlcdc_plane_rgb_and_yuv_formats,
332 .regs_offset = 0x340,
333 .id = 3,
334 .type = ATMEL_HLCDC_OVERLAY_LAYER,
335 .cfgs_offset = 0x4c,
336 .layout = {
337 .pos = 2,
338 .size = 3,
339 .memsize = 4,
340 .xstride = { 5, 7 },
341 .pstride = { 6, 8 },
342 .default_color = 9,
343 .chroma_key = 10,
344 .chroma_key_mask = 11,
345 .general_config = 12,
346 .scaler_config = 13,
347 .phicoeffs = {
348 .x = 17,
349 .y = 33,
350 },
351 .csc = 14,
352 },
353 .clut_offset = 0x1200,
354 },
355};
356
357static const struct atmel_hlcdc_dc_desc atmel_hlcdc_dc_sama5d4 = {
358 .min_width = 0,
359 .min_height = 0,
360 .max_width = 2048,
361 .max_height = 2048,
362 .max_spw = 0xff,
363 .max_vpw = 0xff,
364 .max_hpw = 0x3ff,
365 .nlayers = ARRAY_SIZE(atmel_hlcdc_sama5d4_layers),
366 .layers = atmel_hlcdc_sama5d4_layers,
367};
368
369static const struct atmel_hlcdc_layer_desc atmel_hlcdc_sam9x60_layers[] = {
370 {
371 .name = "base",
372 .formats = &atmel_hlcdc_plane_rgb_formats,
373 .regs_offset = 0x60,
374 .id = 0,
375 .type = ATMEL_HLCDC_BASE_LAYER,
376 .cfgs_offset = 0x2c,
377 .layout = {
378 .xstride = { 2 },
379 .default_color = 3,
380 .general_config = 4,
381 .disc_pos = 5,
382 .disc_size = 6,
383 },
384 .clut_offset = 0x600,
385 },
386 {
387 .name = "overlay1",
388 .formats = &atmel_hlcdc_plane_rgb_formats,
389 .regs_offset = 0x160,
390 .id = 1,
391 .type = ATMEL_HLCDC_OVERLAY_LAYER,
392 .cfgs_offset = 0x2c,
393 .layout = {
394 .pos = 2,
395 .size = 3,
396 .xstride = { 4 },
397 .pstride = { 5 },
398 .default_color = 6,
399 .chroma_key = 7,
400 .chroma_key_mask = 8,
401 .general_config = 9,
402 },
403 .clut_offset = 0xa00,
404 },
405 {
406 .name = "overlay2",
407 .formats = &atmel_hlcdc_plane_rgb_formats,
408 .regs_offset = 0x260,
409 .id = 2,
410 .type = ATMEL_HLCDC_OVERLAY_LAYER,
411 .cfgs_offset = 0x2c,
412 .layout = {
413 .pos = 2,
414 .size = 3,
415 .xstride = { 4 },
416 .pstride = { 5 },
417 .default_color = 6,
418 .chroma_key = 7,
419 .chroma_key_mask = 8,
420 .general_config = 9,
421 },
422 .clut_offset = 0xe00,
423 },
424 {
425 .name = "high-end-overlay",
426 .formats = &atmel_hlcdc_plane_rgb_and_yuv_formats,
427 .regs_offset = 0x360,
428 .id = 3,
429 .type = ATMEL_HLCDC_OVERLAY_LAYER,
430 .cfgs_offset = 0x4c,
431 .layout = {
432 .pos = 2,
433 .size = 3,
434 .memsize = 4,
435 .xstride = { 5, 7 },
436 .pstride = { 6, 8 },
437 .default_color = 9,
438 .chroma_key = 10,
439 .chroma_key_mask = 11,
440 .general_config = 12,
441 .scaler_config = 13,
442 .phicoeffs = {
443 .x = 17,
444 .y = 33,
445 },
446 .csc = 14,
447 },
448 .clut_offset = 0x1200,
449 },
450};
451
452static const struct atmel_hlcdc_dc_desc atmel_hlcdc_dc_sam9x60 = {
453 .min_width = 0,
454 .min_height = 0,
455 .max_width = 2048,
456 .max_height = 2048,
457 .max_spw = 0xff,
458 .max_vpw = 0xff,
459 .max_hpw = 0x3ff,
460 .fixed_clksrc = true,
461 .nlayers = ARRAY_SIZE(atmel_hlcdc_sam9x60_layers),
462 .layers = atmel_hlcdc_sam9x60_layers,
463};
464
465static const struct of_device_id atmel_hlcdc_of_match[] = {
466 {
467 .compatible = "atmel,at91sam9n12-hlcdc",
468 .data = &atmel_hlcdc_dc_at91sam9n12,
469 },
470 {
471 .compatible = "atmel,at91sam9x5-hlcdc",
472 .data = &atmel_hlcdc_dc_at91sam9x5,
473 },
474 {
475 .compatible = "atmel,sama5d2-hlcdc",
476 .data = &atmel_hlcdc_dc_sama5d4,
477 },
478 {
479 .compatible = "atmel,sama5d3-hlcdc",
480 .data = &atmel_hlcdc_dc_sama5d3,
481 },
482 {
483 .compatible = "atmel,sama5d4-hlcdc",
484 .data = &atmel_hlcdc_dc_sama5d4,
485 },
486 {
487 .compatible = "microchip,sam9x60-hlcdc",
488 .data = &atmel_hlcdc_dc_sam9x60,
489 },
490 { /* sentinel */ },
491};
492MODULE_DEVICE_TABLE(of, atmel_hlcdc_of_match);
493
494enum drm_mode_status
495atmel_hlcdc_dc_mode_valid(struct atmel_hlcdc_dc *dc,
496 const struct drm_display_mode *mode)
497{
498 int vfront_porch = mode->vsync_start - mode->vdisplay;
499 int vback_porch = mode->vtotal - mode->vsync_end;
500 int vsync_len = mode->vsync_end - mode->vsync_start;
501 int hfront_porch = mode->hsync_start - mode->hdisplay;
502 int hback_porch = mode->htotal - mode->hsync_end;
503 int hsync_len = mode->hsync_end - mode->hsync_start;
504
505 if (hsync_len > dc->desc->max_spw + 1 || hsync_len < 1)
506 return MODE_HSYNC;
507
508 if (vsync_len > dc->desc->max_spw + 1 || vsync_len < 1)
509 return MODE_VSYNC;
510
511 if (hfront_porch > dc->desc->max_hpw + 1 || hfront_porch < 1 ||
512 hback_porch > dc->desc->max_hpw + 1 || hback_porch < 1 ||
513 mode->hdisplay < 1)
514 return MODE_H_ILLEGAL;
515
516 if (vfront_porch > dc->desc->max_vpw + 1 || vfront_porch < 1 ||
517 vback_porch > dc->desc->max_vpw || vback_porch < 0 ||
518 mode->vdisplay < 1)
519 return MODE_V_ILLEGAL;
520
521 return MODE_OK;
522}
523
524static void atmel_hlcdc_layer_irq(struct atmel_hlcdc_layer *layer)
525{
526 if (!layer)
527 return;
528
529 if (layer->desc->type == ATMEL_HLCDC_BASE_LAYER ||
530 layer->desc->type == ATMEL_HLCDC_OVERLAY_LAYER ||
531 layer->desc->type == ATMEL_HLCDC_CURSOR_LAYER)
532 atmel_hlcdc_plane_irq(atmel_hlcdc_layer_to_plane(layer));
533}
534
535static irqreturn_t atmel_hlcdc_dc_irq_handler(int irq, void *data)
536{
537 struct drm_device *dev = data;
538 struct atmel_hlcdc_dc *dc = dev->dev_private;
539 unsigned long status;
540 unsigned int imr, isr;
541 int i;
542
543 regmap_read(dc->hlcdc->regmap, ATMEL_HLCDC_IMR, &imr);
544 regmap_read(dc->hlcdc->regmap, ATMEL_HLCDC_ISR, &isr);
545 status = imr & isr;
546 if (!status)
547 return IRQ_NONE;
548
549 if (status & ATMEL_HLCDC_SOF)
550 atmel_hlcdc_crtc_irq(dc->crtc);
551
552 for (i = 0; i < ATMEL_HLCDC_MAX_LAYERS; i++) {
553 if (ATMEL_HLCDC_LAYER_STATUS(i) & status)
554 atmel_hlcdc_layer_irq(dc->layers[i]);
555 }
556
557 return IRQ_HANDLED;
558}
559
560struct atmel_hlcdc_dc_commit {
561 struct work_struct work;
562 struct drm_device *dev;
563 struct drm_atomic_state *state;
564};
565
566static void
567atmel_hlcdc_dc_atomic_complete(struct atmel_hlcdc_dc_commit *commit)
568{
569 struct drm_device *dev = commit->dev;
570 struct atmel_hlcdc_dc *dc = dev->dev_private;
571 struct drm_atomic_state *old_state = commit->state;
572
573 /* Apply the atomic update. */
574 drm_atomic_helper_commit_modeset_disables(dev, old_state);
575 drm_atomic_helper_commit_planes(dev, old_state, 0);
576 drm_atomic_helper_commit_modeset_enables(dev, old_state);
577
578 drm_atomic_helper_wait_for_vblanks(dev, old_state);
579
580 drm_atomic_helper_cleanup_planes(dev, old_state);
581
582 drm_atomic_state_put(old_state);
583
584 /* Complete the commit, wake up any waiter. */
585 spin_lock(&dc->commit.wait.lock);
586 dc->commit.pending = false;
587 wake_up_all_locked(&dc->commit.wait);
588 spin_unlock(&dc->commit.wait.lock);
589
590 kfree(commit);
591}
592
593static void atmel_hlcdc_dc_atomic_work(struct work_struct *work)
594{
595 struct atmel_hlcdc_dc_commit *commit =
596 container_of(work, struct atmel_hlcdc_dc_commit, work);
597
598 atmel_hlcdc_dc_atomic_complete(commit);
599}
600
601static int atmel_hlcdc_dc_atomic_commit(struct drm_device *dev,
602 struct drm_atomic_state *state,
603 bool async)
604{
605 struct atmel_hlcdc_dc *dc = dev->dev_private;
606 struct atmel_hlcdc_dc_commit *commit;
607 int ret;
608
609 ret = drm_atomic_helper_prepare_planes(dev, state);
610 if (ret)
611 return ret;
612
613 /* Allocate the commit object. */
614 commit = kzalloc(sizeof(*commit), GFP_KERNEL);
615 if (!commit) {
616 ret = -ENOMEM;
617 goto error;
618 }
619
620 INIT_WORK(&commit->work, atmel_hlcdc_dc_atomic_work);
621 commit->dev = dev;
622 commit->state = state;
623
624 spin_lock(&dc->commit.wait.lock);
625 ret = wait_event_interruptible_locked(dc->commit.wait,
626 !dc->commit.pending);
627 if (ret == 0)
628 dc->commit.pending = true;
629 spin_unlock(&dc->commit.wait.lock);
630
631 if (ret)
632 goto err_free;
633
634 /* We have our own synchronization through the commit lock. */
635 BUG_ON(drm_atomic_helper_swap_state(state, false) < 0);
636
637 /* Swap state succeeded, this is the point of no return. */
638 drm_atomic_state_get(state);
639 if (async)
640 queue_work(dc->wq, &commit->work);
641 else
642 atmel_hlcdc_dc_atomic_complete(commit);
643
644 return 0;
645
646err_free:
647 kfree(commit);
648error:
649 drm_atomic_helper_cleanup_planes(dev, state);
650 return ret;
651}
652
653static const struct drm_mode_config_funcs mode_config_funcs = {
654 .fb_create = drm_gem_fb_create,
655 .atomic_check = drm_atomic_helper_check,
656 .atomic_commit = atmel_hlcdc_dc_atomic_commit,
657};
658
659static int atmel_hlcdc_dc_modeset_init(struct drm_device *dev)
660{
661 struct atmel_hlcdc_dc *dc = dev->dev_private;
662 int ret;
663
664 drm_mode_config_init(dev);
665
666 ret = atmel_hlcdc_create_outputs(dev);
667 if (ret) {
668 dev_err(dev->dev, "failed to create HLCDC outputs: %d\n", ret);
669 return ret;
670 }
671
672 ret = atmel_hlcdc_create_planes(dev);
673 if (ret) {
674 dev_err(dev->dev, "failed to create planes: %d\n", ret);
675 return ret;
676 }
677
678 ret = atmel_hlcdc_crtc_create(dev);
679 if (ret) {
680 dev_err(dev->dev, "failed to create crtc\n");
681 return ret;
682 }
683
684 dev->mode_config.min_width = dc->desc->min_width;
685 dev->mode_config.min_height = dc->desc->min_height;
686 dev->mode_config.max_width = dc->desc->max_width;
687 dev->mode_config.max_height = dc->desc->max_height;
688 dev->mode_config.funcs = &mode_config_funcs;
689
690 return 0;
691}
692
693static int atmel_hlcdc_dc_load(struct drm_device *dev)
694{
695 struct platform_device *pdev = to_platform_device(dev->dev);
696 const struct of_device_id *match;
697 struct atmel_hlcdc_dc *dc;
698 int ret;
699
700 match = of_match_node(atmel_hlcdc_of_match, dev->dev->parent->of_node);
701 if (!match) {
702 dev_err(&pdev->dev, "invalid compatible string\n");
703 return -ENODEV;
704 }
705
706 if (!match->data) {
707 dev_err(&pdev->dev, "invalid hlcdc description\n");
708 return -EINVAL;
709 }
710
711 dc = devm_kzalloc(dev->dev, sizeof(*dc), GFP_KERNEL);
712 if (!dc)
713 return -ENOMEM;
714
715 dc->wq = alloc_ordered_workqueue("atmel-hlcdc-dc", 0);
716 if (!dc->wq)
717 return -ENOMEM;
718
719 init_waitqueue_head(&dc->commit.wait);
720 dc->desc = match->data;
721 dc->hlcdc = dev_get_drvdata(dev->dev->parent);
722 dev->dev_private = dc;
723
724 ret = clk_prepare_enable(dc->hlcdc->periph_clk);
725 if (ret) {
726 dev_err(dev->dev, "failed to enable periph_clk\n");
727 goto err_destroy_wq;
728 }
729
730 pm_runtime_enable(dev->dev);
731
732 ret = drm_vblank_init(dev, 1);
733 if (ret < 0) {
734 dev_err(dev->dev, "failed to initialize vblank\n");
735 goto err_periph_clk_disable;
736 }
737
738 ret = atmel_hlcdc_dc_modeset_init(dev);
739 if (ret < 0) {
740 dev_err(dev->dev, "failed to initialize mode setting\n");
741 goto err_periph_clk_disable;
742 }
743
744 drm_mode_config_reset(dev);
745
746 pm_runtime_get_sync(dev->dev);
747 ret = drm_irq_install(dev, dc->hlcdc->irq);
748 pm_runtime_put_sync(dev->dev);
749 if (ret < 0) {
750 dev_err(dev->dev, "failed to install IRQ handler\n");
751 goto err_periph_clk_disable;
752 }
753
754 platform_set_drvdata(pdev, dev);
755
756 drm_kms_helper_poll_init(dev);
757
758 return 0;
759
760err_periph_clk_disable:
761 pm_runtime_disable(dev->dev);
762 clk_disable_unprepare(dc->hlcdc->periph_clk);
763
764err_destroy_wq:
765 destroy_workqueue(dc->wq);
766
767 return ret;
768}
769
770static void atmel_hlcdc_dc_unload(struct drm_device *dev)
771{
772 struct atmel_hlcdc_dc *dc = dev->dev_private;
773
774 flush_workqueue(dc->wq);
775 drm_kms_helper_poll_fini(dev);
776 drm_atomic_helper_shutdown(dev);
777 drm_mode_config_cleanup(dev);
778
779 pm_runtime_get_sync(dev->dev);
780 drm_irq_uninstall(dev);
781 pm_runtime_put_sync(dev->dev);
782
783 dev->dev_private = NULL;
784
785 pm_runtime_disable(dev->dev);
786 clk_disable_unprepare(dc->hlcdc->periph_clk);
787 destroy_workqueue(dc->wq);
788}
789
790static int atmel_hlcdc_dc_irq_postinstall(struct drm_device *dev)
791{
792 struct atmel_hlcdc_dc *dc = dev->dev_private;
793 unsigned int cfg = 0;
794 int i;
795
796 /* Enable interrupts on activated layers */
797 for (i = 0; i < ATMEL_HLCDC_MAX_LAYERS; i++) {
798 if (dc->layers[i])
799 cfg |= ATMEL_HLCDC_LAYER_STATUS(i);
800 }
801
802 regmap_write(dc->hlcdc->regmap, ATMEL_HLCDC_IER, cfg);
803
804 return 0;
805}
806
807static void atmel_hlcdc_dc_irq_uninstall(struct drm_device *dev)
808{
809 struct atmel_hlcdc_dc *dc = dev->dev_private;
810 unsigned int isr;
811
812 regmap_write(dc->hlcdc->regmap, ATMEL_HLCDC_IDR, 0xffffffff);
813 regmap_read(dc->hlcdc->regmap, ATMEL_HLCDC_ISR, &isr);
814}
815
816DEFINE_DRM_GEM_CMA_FOPS(fops);
817
818static struct drm_driver atmel_hlcdc_dc_driver = {
819 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
820 .irq_handler = atmel_hlcdc_dc_irq_handler,
821 .irq_preinstall = atmel_hlcdc_dc_irq_uninstall,
822 .irq_postinstall = atmel_hlcdc_dc_irq_postinstall,
823 .irq_uninstall = atmel_hlcdc_dc_irq_uninstall,
824 DRM_GEM_CMA_DRIVER_OPS,
825 .fops = &fops,
826 .name = "atmel-hlcdc",
827 .desc = "Atmel HLCD Controller DRM",
828 .date = "20141504",
829 .major = 1,
830 .minor = 0,
831};
832
833static int atmel_hlcdc_dc_drm_probe(struct platform_device *pdev)
834{
835 struct drm_device *ddev;
836 int ret;
837
838 ddev = drm_dev_alloc(&atmel_hlcdc_dc_driver, &pdev->dev);
839 if (IS_ERR(ddev))
840 return PTR_ERR(ddev);
841
842 ret = atmel_hlcdc_dc_load(ddev);
843 if (ret)
844 goto err_put;
845
846 ret = drm_dev_register(ddev, 0);
847 if (ret)
848 goto err_unload;
849
850 drm_fbdev_generic_setup(ddev, 24);
851
852 return 0;
853
854err_unload:
855 atmel_hlcdc_dc_unload(ddev);
856
857err_put:
858 drm_dev_put(ddev);
859
860 return ret;
861}
862
863static int atmel_hlcdc_dc_drm_remove(struct platform_device *pdev)
864{
865 struct drm_device *ddev = platform_get_drvdata(pdev);
866
867 drm_dev_unregister(ddev);
868 atmel_hlcdc_dc_unload(ddev);
869 drm_dev_put(ddev);
870
871 return 0;
872}
873
874#ifdef CONFIG_PM_SLEEP
875static int atmel_hlcdc_dc_drm_suspend(struct device *dev)
876{
877 struct drm_device *drm_dev = dev_get_drvdata(dev);
878 struct atmel_hlcdc_dc *dc = drm_dev->dev_private;
879 struct regmap *regmap = dc->hlcdc->regmap;
880 struct drm_atomic_state *state;
881
882 state = drm_atomic_helper_suspend(drm_dev);
883 if (IS_ERR(state))
884 return PTR_ERR(state);
885
886 dc->suspend.state = state;
887
888 regmap_read(regmap, ATMEL_HLCDC_IMR, &dc->suspend.imr);
889 regmap_write(regmap, ATMEL_HLCDC_IDR, dc->suspend.imr);
890 clk_disable_unprepare(dc->hlcdc->periph_clk);
891
892 return 0;
893}
894
895static int atmel_hlcdc_dc_drm_resume(struct device *dev)
896{
897 struct drm_device *drm_dev = dev_get_drvdata(dev);
898 struct atmel_hlcdc_dc *dc = drm_dev->dev_private;
899
900 clk_prepare_enable(dc->hlcdc->periph_clk);
901 regmap_write(dc->hlcdc->regmap, ATMEL_HLCDC_IER, dc->suspend.imr);
902
903 return drm_atomic_helper_resume(drm_dev, dc->suspend.state);
904}
905#endif
906
907static SIMPLE_DEV_PM_OPS(atmel_hlcdc_dc_drm_pm_ops,
908 atmel_hlcdc_dc_drm_suspend, atmel_hlcdc_dc_drm_resume);
909
910static const struct of_device_id atmel_hlcdc_dc_of_match[] = {
911 { .compatible = "atmel,hlcdc-display-controller" },
912 { },
913};
914
915static struct platform_driver atmel_hlcdc_dc_platform_driver = {
916 .probe = atmel_hlcdc_dc_drm_probe,
917 .remove = atmel_hlcdc_dc_drm_remove,
918 .driver = {
919 .name = "atmel-hlcdc-display-controller",
920 .pm = &atmel_hlcdc_dc_drm_pm_ops,
921 .of_match_table = atmel_hlcdc_dc_of_match,
922 },
923};
924module_platform_driver(atmel_hlcdc_dc_platform_driver);
925
926MODULE_AUTHOR("Jean-Jacques Hiblot <jjhiblot@traphandler.com>");
927MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>");
928MODULE_DESCRIPTION("Atmel HLCDC Display Controller DRM Driver");
929MODULE_LICENSE("GPL");
930MODULE_ALIAS("platform:atmel-hlcdc-dc");