summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/armada/armada_crtc.c
blob: 5d77e51e31811ba1b109fa3360407cb81a874c1a (plain)
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
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2012 Russell King
 *  Rewritten from the dovefb driver, and Armada510 manuals.
 */
#include <linux/clk.h>
#include <linux/component.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <drm/drmP.h>
#include <drm/drm_atomic.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_plane_helper.h>
#include <drm/drm_atomic_helper.h>
#include "armada_crtc.h"
#include "armada_drm.h"
#include "armada_fb.h"
#include "armada_gem.h"
#include "armada_hw.h"
#include "armada_plane.h"
#include "armada_trace.h"

/*
 * A note about interlacing.  Let's consider HDMI 1920x1080i.
 * The timing parameters we have from X are:
 *  Hact HsyA HsyI Htot  Vact VsyA VsyI Vtot
 *  1920 2448 2492 2640  1080 1084 1094 1125
 * Which get translated to:
 *  Hact HsyA HsyI Htot  Vact VsyA VsyI Vtot
 *  1920 2448 2492 2640   540  542  547  562
 *
 * This is how it is defined by CEA-861-D - line and pixel numbers are
 * referenced to the rising edge of VSYNC and HSYNC.  Total clocks per
 * line: 2640.  The odd frame, the first active line is at line 21, and
 * the even frame, the first active line is 584.
 *
 * LN:    560     561     562     563             567     568    569
 * DE:    ~~~|____________________________//__________________________
 * HSYNC: ____|~|_____|~|_____|~|_____|~|_//__|~|_____|~|_____|~|_____
 * VSYNC: _________________________|~~~~~~//~~~~~~~~~~~~~~~|__________
 *  22 blanking lines.  VSYNC at 1320 (referenced to the HSYNC rising edge).
 *
 * LN:    1123   1124    1125      1               5       6      7
 * DE:    ~~~|____________________________//__________________________
 * HSYNC: ____|~|_____|~|_____|~|_____|~|_//__|~|_____|~|_____|~|_____
 * VSYNC: ____________________|~~~~~~~~~~~//~~~~~~~~~~|_______________
 *  23 blanking lines
 *
 * The Armada LCD Controller line and pixel numbers are, like X timings,
 * referenced to the top left of the active frame.
 *
 * So, translating these to our LCD controller:
 *  Odd frame, 563 total lines, VSYNC at line 543-548, pixel 1128.
 *  Even frame, 562 total lines, VSYNC at line 542-547, pixel 2448.
 * Note: Vsync front porch remains constant!
 *
 * if (odd_frame) {
 *   vtotal = mode->crtc_vtotal + 1;
 *   vbackporch = mode->crtc_vsync_start - mode->crtc_vdisplay + 1;
 *   vhorizpos = mode->crtc_hsync_start - mode->crtc_htotal / 2
 * } else {
 *   vtotal = mode->crtc_vtotal;
 *   vbackporch = mode->crtc_vsync_start - mode->crtc_vdisplay;
 *   vhorizpos = mode->crtc_hsync_start;
 * }
 * vfrontporch = mode->crtc_vtotal - mode->crtc_vsync_end;
 *
 * So, we need to reprogram these registers on each vsync event:
 *  LCD_SPU_V_PORCH, LCD_SPU_ADV_REG, LCD_SPUT_V_H_TOTAL
 *
 * Note: we do not use the frame done interrupts because these appear
 * to happen too early, and lead to jitter on the display (presumably
 * they occur at the end of the last active line, before the vsync back
 * porch, which we're reprogramming.)
 */

void
armada_drm_crtc_update_regs(struct armada_crtc *dcrtc, struct armada_regs *regs)
{
	while (regs->offset != ~0) {
		void __iomem *reg = dcrtc->base + regs->offset;
		uint32_t val;

		val = regs->mask;
		if (val != 0)
			val &= readl_relaxed(reg);
		writel_relaxed(val | regs->val, reg);
		++regs;
	}
}

static void armada_drm_crtc_update(struct armada_crtc *dcrtc, bool enable)
{
	uint32_t dumb_ctrl;

	dumb_ctrl = dcrtc->cfg_dumb_ctrl;

	if (enable)
		dumb_ctrl |= CFG_DUMB_ENA;

	/*
	 * When the dumb interface isn't in DUMB24_RGB888_0 mode, it might
	 * be using SPI or GPIO.  If we set this to DUMB_BLANK, we will
	 * force LCD_D[23:0] to output blank color, overriding the GPIO or
	 * SPI usage.  So leave it as-is unless in DUMB24_RGB888_0 mode.
	 */
	if (!enable && (dumb_ctrl & DUMB_MASK) == DUMB24_RGB888_0) {
		dumb_ctrl &= ~DUMB_MASK;
		dumb_ctrl |= DUMB_BLANK;
	}

	armada_updatel(dumb_ctrl,
		       ~(CFG_INV_CSYNC | CFG_INV_HSYNC | CFG_INV_VSYNC),
		       dcrtc->base + LCD_SPU_DUMB_CTRL);
}

static void armada_drm_crtc_queue_state_event(struct drm_crtc *crtc)
{
	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
	struct drm_pending_vblank_event *event;

	/* If we have an event, we need vblank events enabled */
	event = xchg(&crtc->state->event, NULL);
	if (event) {
		WARN_ON(drm_crtc_vblank_get(crtc) != 0);
		dcrtc->event = event;
	}
}

/* The mode_config.mutex will be held for this call */
static bool armada_drm_crtc_mode_fixup(struct drm_crtc *crtc,
	const struct drm_display_mode *mode, struct drm_display_mode *adj)
{
	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
	int ret;

	/* We can't do interlaced modes if we don't have the SPU_ADV_REG */
	if (!dcrtc->variant->has_spu_adv_reg &&
	    adj->flags & DRM_MODE_FLAG_INTERLACE)
		return false;

	/* Check whether the display mode is possible */
	ret = dcrtc->variant->compute_clock(dcrtc, adj, NULL);
	if (ret)
		return false;

	return true;
}

/* These are locked by dev->vbl_lock */
static void armada_drm_crtc_disable_irq(struct armada_crtc *dcrtc, u32 mask)
{
	if (dcrtc->irq_ena & mask) {
		dcrtc->irq_ena &= ~mask;
		writel(dcrtc->irq_ena, dcrtc->base + LCD_SPU_IRQ_ENA);
	}
}

static void armada_drm_crtc_enable_irq(struct armada_crtc *dcrtc, u32 mask)
{
	if ((dcrtc->irq_ena & mask) != mask) {
		dcrtc->irq_ena |= mask;
		writel(dcrtc->irq_ena, dcrtc->base + LCD_SPU_IRQ_ENA);
		if (readl_relaxed(dcrtc->base + LCD_SPU_IRQ_ISR) & mask)
			writel(0, dcrtc->base + LCD_SPU_IRQ_ISR);
	}
}

static void armada_drm_crtc_irq(struct armada_crtc *dcrtc, u32 stat)
{
	struct drm_pending_vblank_event *event;
	void __iomem *base = dcrtc->base;

	if (stat & DMA_FF_UNDERFLOW)
		DRM_ERROR("video underflow on crtc %u\n", dcrtc->num);
	if (stat & GRA_FF_UNDERFLOW)
		DRM_ERROR("graphics underflow on crtc %u\n", dcrtc->num);

	if (stat & VSYNC_IRQ)
		drm_crtc_handle_vblank(&dcrtc->crtc);

	spin_lock(&dcrtc->irq_lock);
	if (stat & GRA_FRAME_IRQ && dcrtc->interlaced) {
		int i = stat & GRA_FRAME_IRQ0 ? 0 : 1;
		uint32_t val;

		writel_relaxed(dcrtc->v[i].spu_v_porch, base + LCD_SPU_V_PORCH);
		writel_relaxed(dcrtc->v[i].spu_v_h_total,
			       base + LCD_SPUT_V_H_TOTAL);

		val = readl_relaxed(base + LCD_SPU_ADV_REG);
		val &= ~(ADV_VSYNC_L_OFF | ADV_VSYNC_H_OFF | ADV_VSYNCOFFEN);
		val |= dcrtc->v[i].spu_adv_reg;
		writel_relaxed(val, base + LCD_SPU_ADV_REG);
	}

	if (stat & dcrtc->irq_ena & DUMB_FRAMEDONE) {
		if (dcrtc->update_pending) {
			armada_drm_crtc_update_regs(dcrtc, dcrtc->regs);
			dcrtc->update_pending = false;
		}
		if (dcrtc->cursor_update) {
			writel_relaxed(dcrtc->cursor_hw_pos,
				       base + LCD_SPU_HWC_OVSA_HPXL_VLN);
			writel_relaxed(dcrtc->cursor_hw_sz,
				       base + LCD_SPU_HWC_HPXL_VLN);
			armada_updatel(CFG_HWC_ENA,
				       CFG_HWC_ENA | CFG_HWC_1BITMOD |
				       CFG_HWC_1BITENA,
				       base + LCD_SPU_DMA_CTRL0);
			dcrtc->cursor_update = false;
		}
		armada_drm_crtc_disable_irq(dcrtc, DUMB_FRAMEDONE_ENA);
	}
	spin_unlock(&dcrtc->irq_lock);

	if (stat & VSYNC_IRQ && !dcrtc->update_pending) {
		event = xchg(&dcrtc->event, NULL);
		if (event) {
			spin_lock(&dcrtc->crtc.dev->event_lock);
			drm_crtc_send_vblank_event(&dcrtc->crtc, event);
			spin_unlock(&dcrtc->crtc.dev->event_lock);
			drm_crtc_vblank_put(&dcrtc->crtc);
		}
	}
}

static irqreturn_t armada_drm_irq(int irq, void *arg)
{
	struct armada_crtc *dcrtc = arg;
	u32 v, stat = readl_relaxed(dcrtc->base + LCD_SPU_IRQ_ISR);

	/*
	 * Reading the ISR appears to clear bits provided CLEAN_SPU_IRQ_ISR
	 * is set.  Writing has some other effect to acknowledge the IRQ -
	 * without this, we only get a single IRQ.
	 */
	writel_relaxed(0, dcrtc->base + LCD_SPU_IRQ_ISR);

	trace_armada_drm_irq(&dcrtc->crtc, stat);

	/* Mask out those interrupts we haven't enabled */
	v = stat & dcrtc->irq_ena;

	if (v & (VSYNC_IRQ|GRA_FRAME_IRQ|DUMB_FRAMEDONE)) {
		armada_drm_crtc_irq(dcrtc, stat);
		return IRQ_HANDLED;
	}
	return IRQ_NONE;
}

/* The mode_config.mutex will be held for this call */
static void armada_drm_crtc_mode_set_nofb(struct drm_crtc *crtc)
{
	struct drm_display_mode *adj = &crtc->state->adjusted_mode;
	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
	struct armada_regs regs[17];
	uint32_t lm, rm, tm, bm, val, sclk;
	unsigned long flags;
	unsigned i;
	bool interlaced = !!(adj->flags & DRM_MODE_FLAG_INTERLACE);

	i = 0;
	rm = adj->crtc_hsync_start - adj->crtc_hdisplay;
	lm = adj->crtc_htotal - adj->crtc_hsync_end;
	bm = adj->crtc_vsync_start - adj->crtc_vdisplay;
	tm = adj->crtc_vtotal - adj->crtc_vsync_end;

	DRM_DEBUG_KMS("[CRTC:%d:%s] mode " DRM_MODE_FMT "\n",
		      crtc->base.id, crtc->name, DRM_MODE_ARG(adj));
	DRM_DEBUG_KMS("lm %d rm %d tm %d bm %d\n", lm, rm, tm, bm);

	/* Now compute the divider for real */
	dcrtc->variant->compute_clock(dcrtc, adj, &sclk);

	armada_reg_queue_set(regs, i, sclk, LCD_CFG_SCLK_DIV);

	if (interlaced ^ dcrtc->interlaced) {
		if (adj->flags & DRM_MODE_FLAG_INTERLACE)
			drm_crtc_vblank_get(&dcrtc->crtc);
		else
			drm_crtc_vblank_put(&dcrtc->crtc);
		dcrtc->interlaced = interlaced;
	}

	spin_lock_irqsave(&dcrtc->irq_lock, flags);

	/* Even interlaced/progressive frame */
	dcrtc->v[1].spu_v_h_total = adj->crtc_vtotal << 16 |
				    adj->crtc_htotal;
	dcrtc->v[1].spu_v_porch = tm << 16 | bm;
	val = adj->crtc_hsync_start;
	dcrtc->v[1].spu_adv_reg = val << 20 | val | ADV_VSYNCOFFEN;

	if (interlaced) {
		/* Odd interlaced frame */
		val -= adj->crtc_htotal / 2;
		dcrtc->v[0].spu_adv_reg = val << 20 | val | ADV_VSYNCOFFEN;
		dcrtc->v[0].spu_v_h_total = dcrtc->v[1].spu_v_h_total +
						(1 << 16);
		dcrtc->v[0].spu_v_porch = dcrtc->v[1].spu_v_porch + 1;
	} else {
		dcrtc->v[0] = dcrtc->v[1];
	}

	val = adj->crtc_vdisplay << 16 | adj->crtc_hdisplay;

	armada_reg_queue_set(regs, i, val, LCD_SPU_V_H_ACTIVE);
	armada_reg_queue_set(regs, i, (lm << 16) | rm, LCD_SPU_H_PORCH);
	armada_reg_queue_set(regs, i, dcrtc->v[0].spu_v_porch, LCD_SPU_V_PORCH);
	armada_reg_queue_set(regs, i, dcrtc->v[0].spu_v_h_total,
			   LCD_SPUT_V_H_TOTAL);

	if (dcrtc->variant->has_spu_adv_reg)
		armada_reg_queue_mod(regs, i, dcrtc->v[0].spu_adv_reg,
				     ADV_VSYNC_L_OFF | ADV_VSYNC_H_OFF |
				     ADV_VSYNCOFFEN, LCD_SPU_ADV_REG);

	val = adj->flags & DRM_MODE_FLAG_NVSYNC ? CFG_VSYNC_INV : 0;
	armada_reg_queue_mod(regs, i, val, CFG_VSYNC_INV, LCD_SPU_DMA_CTRL1);

	/*
	 * The documentation doesn't indicate what the normal state of
	 * the sync signals are.  Sebastian Hesselbart kindly probed
	 * these signals on his board to determine their state.
	 *
	 * The non-inverted state of the sync signals is active high.
	 * Setting these bits makes the appropriate signal active low.
	 */
	val = 0;
	if (adj->flags & DRM_MODE_FLAG_NCSYNC)
		val |= CFG_INV_CSYNC;
	if (adj->flags & DRM_MODE_FLAG_NHSYNC)
		val |= CFG_INV_HSYNC;
	if (adj->flags & DRM_MODE_FLAG_NVSYNC)
		val |= CFG_INV_VSYNC;
	armada_reg_queue_mod(regs, i, val, CFG_INV_CSYNC | CFG_INV_HSYNC |
			     CFG_INV_VSYNC, LCD_SPU_DUMB_CTRL);
	armada_reg_queue_end(regs, i);

	armada_drm_crtc_update_regs(dcrtc, regs);
	spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
}

static void armada_drm_crtc_atomic_begin(struct drm_crtc *crtc,
					 struct drm_crtc_state *old_crtc_state)
{
	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);

	DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);

	dcrtc->regs_idx = 0;
	dcrtc->regs = dcrtc->atomic_regs;
}

static void armada_drm_crtc_atomic_flush(struct drm_crtc *crtc,
					 struct drm_crtc_state *old_crtc_state)
{
	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);

	DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);

	armada_reg_queue_end(dcrtc->regs, dcrtc->regs_idx);

	/*
	 * If we aren't doing a full modeset, then we need to queue
	 * the event here.
	 */
	if (!drm_atomic_crtc_needs_modeset(crtc->state)) {
		dcrtc->update_pending = true;
		armada_drm_crtc_queue_state_event(crtc);
		spin_lock_irq(&dcrtc->irq_lock);
		armada_drm_crtc_enable_irq(dcrtc, DUMB_FRAMEDONE_ENA);
		spin_unlock_irq(&dcrtc->irq_lock);
	} else {
		spin_lock_irq(&dcrtc->irq_lock);
		armada_drm_crtc_update_regs(dcrtc, dcrtc->regs);
		spin_unlock_irq(&dcrtc->irq_lock);
	}
}

static void armada_drm_crtc_atomic_disable(struct drm_crtc *crtc,
					   struct drm_crtc_state *old_state)
{
	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
	struct drm_pending_vblank_event *event;

	DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);

	drm_crtc_vblank_off(crtc);
	armada_drm_crtc_update(dcrtc, false);

	if (!crtc->state->active) {
		/*
		 * This modeset will be leaving the CRTC disabled, so
		 * call the backend to disable upstream clocks etc.
		 */
		if (dcrtc->variant->disable)
			dcrtc->variant->disable(dcrtc);

		/*
		 * We will not receive any further vblank events.
		 * Send the flip_done event manually.
		 */
		event = crtc->state->event;
		crtc->state->event = NULL;
		if (event) {
			spin_lock_irq(&crtc->dev->event_lock);
			drm_crtc_send_vblank_event(crtc, event);
			spin_unlock_irq(&crtc->dev->event_lock);
		}
	}
}

static void armada_drm_crtc_atomic_enable(struct drm_crtc *crtc,
					  struct drm_crtc_state *old_state)
{
	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);

	DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);

	if (!old_state->active) {
		/*
		 * This modeset is enabling the CRTC after it having
		 * been disabled.  Reverse the call to ->disable in
		 * the atomic_disable().
		 */
		if (dcrtc->variant->enable)
			dcrtc->variant->enable(dcrtc, &crtc->state->adjusted_mode);
	}
	armada_drm_crtc_update(dcrtc, true);
	drm_crtc_vblank_on(crtc);

	armada_drm_crtc_queue_state_event(crtc);
}

static const struct drm_crtc_helper_funcs armada_crtc_helper_funcs = {
	.mode_fixup	= armada_drm_crtc_mode_fixup,
	.mode_set_nofb	= armada_drm_crtc_mode_set_nofb,
	.atomic_begin	= armada_drm_crtc_atomic_begin,
	.atomic_flush	= armada_drm_crtc_atomic_flush,
	.atomic_disable	= armada_drm_crtc_atomic_disable,
	.atomic_enable	= armada_drm_crtc_atomic_enable,
};

static void armada_load_cursor_argb(void __iomem *base, uint32_t *pix,
	unsigned stride, unsigned width, unsigned height)
{
	uint32_t addr;
	unsigned y;

	addr = SRAM_HWC32_RAM1;
	for (y = 0; y < height; y++) {
		uint32_t *p = &pix[y * stride];
		unsigned x;

		for (x = 0; x < width; x++, p++) {
			uint32_t val = *p;

			val = (val & 0xff00ff00) |
			      (val & 0x000000ff) << 16 |
			      (val & 0x00ff0000) >> 16;

			writel_relaxed(val,
				       base + LCD_SPU_SRAM_WRDAT);
			writel_relaxed(addr | SRAM_WRITE,
				       base + LCD_SPU_SRAM_CTRL);
			readl_relaxed(base + LCD_SPU_HWC_OVSA_HPXL_VLN);
			addr += 1;
			if ((addr & 0x00ff) == 0)
				addr += 0xf00;
			if ((addr & 0x30ff) == 0)
				addr = SRAM_HWC32_RAM2;
		}
	}
}

static void armada_drm_crtc_cursor_tran(void __iomem *base)
{
	unsigned addr;

	for (addr = 0; addr < 256; addr++) {
		/* write the default value */
		writel_relaxed(0x55555555, base + LCD_SPU_SRAM_WRDAT);
		writel_relaxed(addr | SRAM_WRITE | SRAM_HWC32_TRAN,
			       base + LCD_SPU_SRAM_CTRL);
	}
}

static int armada_drm_crtc_cursor_update(struct armada_crtc *dcrtc, bool reload)
{
	uint32_t xoff, xscr, w = dcrtc->cursor_w, s;
	uint32_t yoff, yscr, h = dcrtc->cursor_h;
	uint32_t para1;

	/*
	 * Calculate the visible width and height of the cursor,
	 * screen position, and the position in the cursor bitmap.
	 */
	if (dcrtc->cursor_x < 0) {
		xoff = -dcrtc->cursor_x;
		xscr = 0;
		w -= min(xoff, w);
	} else if (dcrtc->cursor_x + w > dcrtc->crtc.mode.hdisplay) {
		xoff = 0;
		xscr = dcrtc->cursor_x;
		w = max_t(int, dcrtc->crtc.mode.hdisplay - dcrtc->cursor_x, 0);
	} else {
		xoff = 0;
		xscr = dcrtc->cursor_x;
	}

	if (dcrtc->cursor_y < 0) {
		yoff = -dcrtc->cursor_y;
		yscr = 0;
		h -= min(yoff, h);
	} else if (dcrtc->cursor_y + h > dcrtc->crtc.mode.vdisplay) {
		yoff = 0;
		yscr = dcrtc->cursor_y;
		h = max_t(int, dcrtc->crtc.mode.vdisplay - dcrtc->cursor_y, 0);
	} else {
		yoff = 0;
		yscr = dcrtc->cursor_y;
	}

	/* On interlaced modes, the vertical cursor size must be halved */
	s = dcrtc->cursor_w;
	if (dcrtc->interlaced) {
		s *= 2;
		yscr /= 2;
		h /= 2;
	}

	if (!dcrtc->cursor_obj || !h || !w) {
		spin_lock_irq(&dcrtc->irq_lock);
		dcrtc->cursor_update = false;
		armada_updatel(0, CFG_HWC_ENA, dcrtc->base + LCD_SPU_DMA_CTRL0);
		spin_unlock_irq(&dcrtc->irq_lock);
		return 0;
	}

	spin_lock_irq(&dcrtc->irq_lock);
	para1 = readl_relaxed(dcrtc->base + LCD_SPU_SRAM_PARA1);
	armada_updatel(CFG_CSB_256x32, CFG_CSB_256x32 | CFG_PDWN256x32,
		       dcrtc->base + LCD_SPU_SRAM_PARA1);
	spin_unlock_irq(&dcrtc->irq_lock);

	/*
	 * Initialize the transparency if the SRAM was powered down.
	 * We must also reload the cursor data as well.
	 */
	if (!(para1 & CFG_CSB_256x32)) {
		armada_drm_crtc_cursor_tran(dcrtc->base);
		reload = true;
	}

	if (dcrtc->cursor_hw_sz != (h << 16 | w)) {
		spin_lock_irq(&dcrtc->irq_lock);
		dcrtc->cursor_update = false;
		armada_updatel(0, CFG_HWC_ENA, dcrtc->base + LCD_SPU_DMA_CTRL0);
		spin_unlock_irq(&dcrtc->irq_lock);
		reload = true;
	}
	if (reload) {
		struct armada_gem_object *obj = dcrtc->cursor_obj;
		uint32_t *pix;
		/* Set the top-left corner of the cursor image */
		pix = obj->addr;
		pix += yoff * s + xoff;
		armada_load_cursor_argb(dcrtc->base, pix, s, w, h);
	}

	/* Reload the cursor position, size and enable in the IRQ handler */
	spin_lock_irq(&dcrtc->irq_lock);
	dcrtc->cursor_hw_pos = yscr << 16 | xscr;
	dcrtc->cursor_hw_sz = h << 16 | w;
	dcrtc->cursor_update = true;
	armada_drm_crtc_enable_irq(dcrtc, DUMB_FRAMEDONE_ENA);
	spin_unlock_irq(&dcrtc->irq_lock);

	return 0;
}

static void cursor_update(void *data)
{
	armada_drm_crtc_cursor_update(data, true);
}

static int armada_drm_crtc_cursor_set(struct drm_crtc *crtc,
	struct drm_file *file, uint32_t handle, uint32_t w, uint32_t h)
{
	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
	struct armada_gem_object *obj = NULL;
	int ret;

	/* If no cursor support, replicate drm's return value */
	if (!dcrtc->variant->has_spu_adv_reg)
		return -ENXIO;

	if (handle && w > 0 && h > 0) {
		/* maximum size is 64x32 or 32x64 */
		if (w > 64 || h > 64 || (w > 32 && h > 32))
			return -ENOMEM;

		obj = armada_gem_object_lookup(file, handle);
		if (!obj)
			return -ENOENT;

		/* Must be a kernel-mapped object */
		if (!obj->addr) {
			drm_gem_object_put_unlocked(&obj->obj);
			return -EINVAL;
		}

		if (obj->obj.size < w * h * 4) {
			DRM_ERROR("buffer is too small\n");
			drm_gem_object_put_unlocked(&obj->obj);
			return -ENOMEM;
		}
	}

	if (dcrtc->cursor_obj) {
		dcrtc->cursor_obj->update = NULL;
		dcrtc->cursor_obj->update_data = NULL;
		drm_gem_object_put_unlocked(&dcrtc->cursor_obj->obj);
	}
	dcrtc->cursor_obj = obj;
	dcrtc->cursor_w = w;
	dcrtc->cursor_h = h;
	ret = armada_drm_crtc_cursor_update(dcrtc, true);
	if (obj) {
		obj->update_data = dcrtc;
		obj->update = cursor_update;
	}

	return ret;
}

static int armada_drm_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
{
	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
	int ret;

	/* If no cursor support, replicate drm's return value */
	if (!dcrtc->variant->has_spu_adv_reg)
		return -EFAULT;

	dcrtc->cursor_x = x;
	dcrtc->cursor_y = y;
	ret = armada_drm_crtc_cursor_update(dcrtc, false);

	return ret;
}

static void armada_drm_crtc_destroy(struct drm_crtc *crtc)
{
	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
	struct armada_private *priv = crtc->dev->dev_private;

	if (dcrtc->cursor_obj)
		drm_gem_object_put_unlocked(&dcrtc->cursor_obj->obj);

	priv->dcrtc[dcrtc->num] = NULL;
	drm_crtc_cleanup(&dcrtc->crtc);

	if (dcrtc->variant->disable)
		dcrtc->variant->disable(dcrtc);

	writel_relaxed(0, dcrtc->base + LCD_SPU_IRQ_ENA);

	of_node_put(dcrtc->crtc.port);

	kfree(dcrtc);
}

/* These are called under the vbl_lock. */
static int armada_drm_crtc_enable_vblank(struct drm_crtc *crtc)
{
	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
	unsigned long flags;

	spin_lock_irqsave(&dcrtc->irq_lock, flags);
	armada_drm_crtc_enable_irq(dcrtc, VSYNC_IRQ_ENA);
	spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
	return 0;
}

static void armada_drm_crtc_disable_vblank(struct drm_crtc *crtc)
{
	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
	unsigned long flags;

	spin_lock_irqsave(&dcrtc->irq_lock, flags);
	armada_drm_crtc_disable_irq(dcrtc, VSYNC_IRQ_ENA);
	spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
}

static const struct drm_crtc_funcs armada_crtc_funcs = {
	.reset		= drm_atomic_helper_crtc_reset,
	.cursor_set	= armada_drm_crtc_cursor_set,
	.cursor_move	= armada_drm_crtc_cursor_move,
	.destroy	= armada_drm_crtc_destroy,
	.set_config	= drm_atomic_helper_set_config,
	.page_flip	= drm_atomic_helper_page_flip,
	.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
	.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
	.enable_vblank	= armada_drm_crtc_enable_vblank,
	.disable_vblank	= armada_drm_crtc_disable_vblank,
};

static int armada_drm_crtc_create(struct drm_device *drm, struct device *dev,
	struct resource *res, int irq, const struct armada_variant *variant,
	struct device_node *port)
{
	struct armada_private *priv = drm->dev_private;
	struct armada_crtc *dcrtc;
	struct drm_plane *primary;
	void __iomem *base;
	int ret;

	base = devm_ioremap_resource(dev, res);
	if (IS_ERR(base))
		return PTR_ERR(base);

	dcrtc = kzalloc(sizeof(*dcrtc), GFP_KERNEL);
	if (!dcrtc) {
		DRM_ERROR("failed to allocate Armada crtc\n");
		return -ENOMEM;
	}

	if (dev != drm->dev)
		dev_set_drvdata(dev, dcrtc);

	dcrtc->variant = variant;
	dcrtc->base = base;
	dcrtc->num = drm->mode_config.num_crtc;
	dcrtc->clk = ERR_PTR(-EINVAL);
	dcrtc->cfg_dumb_ctrl = DUMB24_RGB888_0;
	dcrtc->spu_iopad_ctrl = CFG_VSCALE_LN_EN | CFG_IOPAD_DUMB24;
	spin_lock_init(&dcrtc->irq_lock);
	dcrtc->irq_ena = CLEAN_SPU_IRQ_ISR;

	/* Initialize some registers which we don't otherwise set */
	writel_relaxed(0x00000001, dcrtc->base + LCD_CFG_SCLK_DIV);
	writel_relaxed(0x00000000, dcrtc->base + LCD_SPU_BLANKCOLOR);
	writel_relaxed(dcrtc->spu_iopad_ctrl,
		       dcrtc->base + LCD_SPU_IOPAD_CONTROL);
	writel_relaxed(0x00000000, dcrtc->base + LCD_SPU_SRAM_PARA0);
	writel_relaxed(CFG_PDWN256x32 | CFG_PDWN256x24 | CFG_PDWN256x8 |
		       CFG_PDWN32x32 | CFG_PDWN16x66 | CFG_PDWN32x66 |
		       CFG_PDWN64x66, dcrtc->base + LCD_SPU_SRAM_PARA1);
	writel_relaxed(0x2032ff81, dcrtc->base + LCD_SPU_DMA_CTRL1);
	writel_relaxed(dcrtc->irq_ena, dcrtc->base + LCD_SPU_IRQ_ENA);
	readl_relaxed(dcrtc->base + LCD_SPU_IRQ_ISR);
	writel_relaxed(0, dcrtc->base + LCD_SPU_IRQ_ISR);

	ret = devm_request_irq(dev, irq, armada_drm_irq, 0, "armada_drm_crtc",
			       dcrtc);
	if (ret < 0)
		goto err_crtc;

	if (dcrtc->variant->init) {
		ret = dcrtc->variant->init(dcrtc, dev);
		if (ret)
			goto err_crtc;
	}

	/* Ensure AXI pipeline is enabled */
	armada_updatel(CFG_ARBFAST_ENA, 0, dcrtc->base + LCD_SPU_DMA_CTRL0);

	priv->dcrtc[dcrtc->num] = dcrtc;

	dcrtc->crtc.port = port;

	primary = kzalloc(sizeof(*primary), GFP_KERNEL);
	if (!primary) {
		ret = -ENOMEM;
		goto err_crtc;
	}

	ret = armada_drm_primary_plane_init(drm, primary);
	if (ret) {
		kfree(primary);
		goto err_crtc;
	}

	ret = drm_crtc_init_with_planes(drm, &dcrtc->crtc, primary, NULL,
					&armada_crtc_funcs, NULL);
	if (ret)
		goto err_crtc_init;

	drm_crtc_helper_add(&dcrtc->crtc, &armada_crtc_helper_funcs);

	return armada_overlay_plane_create(drm, 1 << dcrtc->num);

err_crtc_init:
	primary->funcs->destroy(primary);
err_crtc:
	kfree(dcrtc);

	return ret;
}

static int
armada_lcd_bind(struct device *dev, struct device *master, void *data)
{
	struct platform_device *pdev = to_platform_device(dev);
	struct drm_device *drm = data;
	struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	int irq = platform_get_irq(pdev, 0);
	const struct armada_variant *variant;
	struct device_node *port = NULL;

	if (irq < 0)
		return irq;

	if (!dev->of_node) {
		const struct platform_device_id *id;

		id = platform_get_device_id(pdev);
		if (!id)
			return -ENXIO;

		variant = (const struct armada_variant *)id->driver_data;
	} else {
		const struct of_device_id *match;
		struct device_node *np, *parent = dev->of_node;

		match = of_match_device(dev->driver->of_match_table, dev);
		if (!match)
			return -ENXIO;

		np = of_get_child_by_name(parent, "ports");
		if (np)
			parent = np;
		port = of_get_child_by_name(parent, "port");
		of_node_put(np);
		if (!port) {
			dev_err(dev, "no port node found in %pOF\n", parent);
			return -ENXIO;
		}

		variant = match->data;
	}

	return armada_drm_crtc_create(drm, dev, res, irq, variant, port);
}

static void
armada_lcd_unbind(struct device *dev, struct device *master, void *data)
{
	struct armada_crtc *dcrtc = dev_get_drvdata(dev);

	armada_drm_crtc_destroy(&dcrtc->crtc);
}

static const struct component_ops armada_lcd_ops = {
	.bind = armada_lcd_bind,
	.unbind = armada_lcd_unbind,
};

static int armada_lcd_probe(struct platform_device *pdev)
{
	return component_add(&pdev->dev, &armada_lcd_ops);
}

static int armada_lcd_remove(struct platform_device *pdev)
{
	component_del(&pdev->dev, &armada_lcd_ops);
	return 0;
}

static const struct of_device_id armada_lcd_of_match[] = {
	{
		.compatible	= "marvell,dove-lcd",
		.data		= &armada510_ops,
	},
	{}
};
MODULE_DEVICE_TABLE(of, armada_lcd_of_match);

static const struct platform_device_id armada_lcd_platform_ids[] = {
	{
		.name		= "armada-lcd",
		.driver_data	= (unsigned long)&armada510_ops,
	}, {
		.name		= "armada-510-lcd",
		.driver_data	= (unsigned long)&armada510_ops,
	},
	{ },
};
MODULE_DEVICE_TABLE(platform, armada_lcd_platform_ids);

struct platform_driver armada_lcd_platform_driver = {
	.probe	= armada_lcd_probe,
	.remove	= armada_lcd_remove,
	.driver = {
		.name	= "armada-lcd",
		.owner	=  THIS_MODULE,
		.of_match_table = armada_lcd_of_match,
	},
	.id_table = armada_lcd_platform_ids,
};