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[mirror_ubuntu-focal-kernel.git] / drivers / gpu / drm / tegra / sor.c
1 /*
2 * Copyright (C) 2013 NVIDIA Corporation
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 */
8
9 #include <linux/clk.h>
10 #include <linux/clk-provider.h>
11 #include <linux/debugfs.h>
12 #include <linux/gpio.h>
13 #include <linux/io.h>
14 #include <linux/of_device.h>
15 #include <linux/platform_device.h>
16 #include <linux/pm_runtime.h>
17 #include <linux/regulator/consumer.h>
18 #include <linux/reset.h>
19
20 #include <soc/tegra/pmc.h>
21
22 #include <drm/drm_atomic_helper.h>
23 #include <drm/drm_dp_helper.h>
24 #include <drm/drm_panel.h>
25
26 #include "dc.h"
27 #include "drm.h"
28 #include "sor.h"
29 #include "trace.h"
30
31 #define SOR_REKEY 0x38
32
33 struct tegra_sor_hdmi_settings {
34 unsigned long frequency;
35
36 u8 vcocap;
37 u8 ichpmp;
38 u8 loadadj;
39 u8 termadj;
40 u8 tx_pu;
41 u8 bg_vref;
42
43 u8 drive_current[4];
44 u8 preemphasis[4];
45 };
46
47 #if 1
48 static const struct tegra_sor_hdmi_settings tegra210_sor_hdmi_defaults[] = {
49 {
50 .frequency = 54000000,
51 .vcocap = 0x0,
52 .ichpmp = 0x1,
53 .loadadj = 0x3,
54 .termadj = 0x9,
55 .tx_pu = 0x10,
56 .bg_vref = 0x8,
57 .drive_current = { 0x33, 0x3a, 0x3a, 0x3a },
58 .preemphasis = { 0x00, 0x00, 0x00, 0x00 },
59 }, {
60 .frequency = 75000000,
61 .vcocap = 0x3,
62 .ichpmp = 0x1,
63 .loadadj = 0x3,
64 .termadj = 0x9,
65 .tx_pu = 0x40,
66 .bg_vref = 0x8,
67 .drive_current = { 0x33, 0x3a, 0x3a, 0x3a },
68 .preemphasis = { 0x00, 0x00, 0x00, 0x00 },
69 }, {
70 .frequency = 150000000,
71 .vcocap = 0x3,
72 .ichpmp = 0x1,
73 .loadadj = 0x3,
74 .termadj = 0x9,
75 .tx_pu = 0x66,
76 .bg_vref = 0x8,
77 .drive_current = { 0x33, 0x3a, 0x3a, 0x3a },
78 .preemphasis = { 0x00, 0x00, 0x00, 0x00 },
79 }, {
80 .frequency = 300000000,
81 .vcocap = 0x3,
82 .ichpmp = 0x1,
83 .loadadj = 0x3,
84 .termadj = 0x9,
85 .tx_pu = 0x66,
86 .bg_vref = 0xa,
87 .drive_current = { 0x33, 0x3f, 0x3f, 0x3f },
88 .preemphasis = { 0x00, 0x17, 0x17, 0x17 },
89 }, {
90 .frequency = 600000000,
91 .vcocap = 0x3,
92 .ichpmp = 0x1,
93 .loadadj = 0x3,
94 .termadj = 0x9,
95 .tx_pu = 0x66,
96 .bg_vref = 0x8,
97 .drive_current = { 0x33, 0x3f, 0x3f, 0x3f },
98 .preemphasis = { 0x00, 0x00, 0x00, 0x00 },
99 },
100 };
101 #else
102 static const struct tegra_sor_hdmi_settings tegra210_sor_hdmi_defaults[] = {
103 {
104 .frequency = 75000000,
105 .vcocap = 0x3,
106 .ichpmp = 0x1,
107 .loadadj = 0x3,
108 .termadj = 0x9,
109 .tx_pu = 0x40,
110 .bg_vref = 0x8,
111 .drive_current = { 0x29, 0x29, 0x29, 0x29 },
112 .preemphasis = { 0x00, 0x00, 0x00, 0x00 },
113 }, {
114 .frequency = 150000000,
115 .vcocap = 0x3,
116 .ichpmp = 0x1,
117 .loadadj = 0x3,
118 .termadj = 0x9,
119 .tx_pu = 0x66,
120 .bg_vref = 0x8,
121 .drive_current = { 0x30, 0x37, 0x37, 0x37 },
122 .preemphasis = { 0x01, 0x02, 0x02, 0x02 },
123 }, {
124 .frequency = 300000000,
125 .vcocap = 0x3,
126 .ichpmp = 0x6,
127 .loadadj = 0x3,
128 .termadj = 0x9,
129 .tx_pu = 0x66,
130 .bg_vref = 0xf,
131 .drive_current = { 0x30, 0x37, 0x37, 0x37 },
132 .preemphasis = { 0x10, 0x3e, 0x3e, 0x3e },
133 }, {
134 .frequency = 600000000,
135 .vcocap = 0x3,
136 .ichpmp = 0xa,
137 .loadadj = 0x3,
138 .termadj = 0xb,
139 .tx_pu = 0x66,
140 .bg_vref = 0xe,
141 .drive_current = { 0x35, 0x3e, 0x3e, 0x3e },
142 .preemphasis = { 0x02, 0x3f, 0x3f, 0x3f },
143 },
144 };
145 #endif
146
147 struct tegra_sor_soc {
148 bool supports_edp;
149 bool supports_lvds;
150 bool supports_hdmi;
151 bool supports_dp;
152
153 const struct tegra_sor_hdmi_settings *settings;
154 unsigned int num_settings;
155
156 const u8 *xbar_cfg;
157 };
158
159 struct tegra_sor;
160
161 struct tegra_sor_ops {
162 const char *name;
163 int (*probe)(struct tegra_sor *sor);
164 int (*remove)(struct tegra_sor *sor);
165 };
166
167 struct tegra_sor {
168 struct host1x_client client;
169 struct tegra_output output;
170 struct device *dev;
171
172 const struct tegra_sor_soc *soc;
173 void __iomem *regs;
174
175 struct reset_control *rst;
176 struct clk *clk_parent;
177 struct clk *clk_safe;
178 struct clk *clk_out;
179 struct clk *clk_pad;
180 struct clk *clk_dp;
181 struct clk *clk;
182
183 struct drm_dp_aux *aux;
184
185 struct drm_info_list *debugfs_files;
186 struct drm_minor *minor;
187 struct dentry *debugfs;
188
189 const struct tegra_sor_ops *ops;
190
191 /* for HDMI 2.0 */
192 struct tegra_sor_hdmi_settings *settings;
193 unsigned int num_settings;
194
195 struct regulator *avdd_io_supply;
196 struct regulator *vdd_pll_supply;
197 struct regulator *hdmi_supply;
198 };
199
200 struct tegra_sor_state {
201 struct drm_connector_state base;
202
203 unsigned int bpc;
204 };
205
206 static inline struct tegra_sor_state *
207 to_sor_state(struct drm_connector_state *state)
208 {
209 return container_of(state, struct tegra_sor_state, base);
210 }
211
212 struct tegra_sor_config {
213 u32 bits_per_pixel;
214
215 u32 active_polarity;
216 u32 active_count;
217 u32 tu_size;
218 u32 active_frac;
219 u32 watermark;
220
221 u32 hblank_symbols;
222 u32 vblank_symbols;
223 };
224
225 static inline struct tegra_sor *
226 host1x_client_to_sor(struct host1x_client *client)
227 {
228 return container_of(client, struct tegra_sor, client);
229 }
230
231 static inline struct tegra_sor *to_sor(struct tegra_output *output)
232 {
233 return container_of(output, struct tegra_sor, output);
234 }
235
236 static inline u32 tegra_sor_readl(struct tegra_sor *sor, unsigned int offset)
237 {
238 u32 value = readl(sor->regs + (offset << 2));
239
240 trace_sor_readl(sor->dev, offset, value);
241
242 return value;
243 }
244
245 static inline void tegra_sor_writel(struct tegra_sor *sor, u32 value,
246 unsigned int offset)
247 {
248 trace_sor_writel(sor->dev, offset, value);
249 writel(value, sor->regs + (offset << 2));
250 }
251
252 static int tegra_sor_set_parent_clock(struct tegra_sor *sor, struct clk *parent)
253 {
254 int err;
255
256 clk_disable_unprepare(sor->clk);
257
258 err = clk_set_parent(sor->clk_out, parent);
259 if (err < 0)
260 return err;
261
262 err = clk_prepare_enable(sor->clk);
263 if (err < 0)
264 return err;
265
266 return 0;
267 }
268
269 struct tegra_clk_sor_pad {
270 struct clk_hw hw;
271 struct tegra_sor *sor;
272 };
273
274 static inline struct tegra_clk_sor_pad *to_pad(struct clk_hw *hw)
275 {
276 return container_of(hw, struct tegra_clk_sor_pad, hw);
277 }
278
279 static const char * const tegra_clk_sor_pad_parents[] = {
280 "pll_d2_out0", "pll_dp"
281 };
282
283 static int tegra_clk_sor_pad_set_parent(struct clk_hw *hw, u8 index)
284 {
285 struct tegra_clk_sor_pad *pad = to_pad(hw);
286 struct tegra_sor *sor = pad->sor;
287 u32 value;
288
289 value = tegra_sor_readl(sor, SOR_CLK_CNTRL);
290 value &= ~SOR_CLK_CNTRL_DP_CLK_SEL_MASK;
291
292 switch (index) {
293 case 0:
294 value |= SOR_CLK_CNTRL_DP_CLK_SEL_SINGLE_PCLK;
295 break;
296
297 case 1:
298 value |= SOR_CLK_CNTRL_DP_CLK_SEL_SINGLE_DPCLK;
299 break;
300 }
301
302 tegra_sor_writel(sor, value, SOR_CLK_CNTRL);
303
304 return 0;
305 }
306
307 static u8 tegra_clk_sor_pad_get_parent(struct clk_hw *hw)
308 {
309 struct tegra_clk_sor_pad *pad = to_pad(hw);
310 struct tegra_sor *sor = pad->sor;
311 u8 parent = U8_MAX;
312 u32 value;
313
314 value = tegra_sor_readl(sor, SOR_CLK_CNTRL);
315
316 switch (value & SOR_CLK_CNTRL_DP_CLK_SEL_MASK) {
317 case SOR_CLK_CNTRL_DP_CLK_SEL_SINGLE_PCLK:
318 case SOR_CLK_CNTRL_DP_CLK_SEL_DIFF_PCLK:
319 parent = 0;
320 break;
321
322 case SOR_CLK_CNTRL_DP_CLK_SEL_SINGLE_DPCLK:
323 case SOR_CLK_CNTRL_DP_CLK_SEL_DIFF_DPCLK:
324 parent = 1;
325 break;
326 }
327
328 return parent;
329 }
330
331 static const struct clk_ops tegra_clk_sor_pad_ops = {
332 .set_parent = tegra_clk_sor_pad_set_parent,
333 .get_parent = tegra_clk_sor_pad_get_parent,
334 };
335
336 static struct clk *tegra_clk_sor_pad_register(struct tegra_sor *sor,
337 const char *name)
338 {
339 struct tegra_clk_sor_pad *pad;
340 struct clk_init_data init;
341 struct clk *clk;
342
343 pad = devm_kzalloc(sor->dev, sizeof(*pad), GFP_KERNEL);
344 if (!pad)
345 return ERR_PTR(-ENOMEM);
346
347 pad->sor = sor;
348
349 init.name = name;
350 init.flags = 0;
351 init.parent_names = tegra_clk_sor_pad_parents;
352 init.num_parents = ARRAY_SIZE(tegra_clk_sor_pad_parents);
353 init.ops = &tegra_clk_sor_pad_ops;
354
355 pad->hw.init = &init;
356
357 clk = devm_clk_register(sor->dev, &pad->hw);
358
359 return clk;
360 }
361
362 static int tegra_sor_dp_train_fast(struct tegra_sor *sor,
363 struct drm_dp_link *link)
364 {
365 unsigned int i;
366 u8 pattern;
367 u32 value;
368 int err;
369
370 /* setup lane parameters */
371 value = SOR_LANE_DRIVE_CURRENT_LANE3(0x40) |
372 SOR_LANE_DRIVE_CURRENT_LANE2(0x40) |
373 SOR_LANE_DRIVE_CURRENT_LANE1(0x40) |
374 SOR_LANE_DRIVE_CURRENT_LANE0(0x40);
375 tegra_sor_writel(sor, value, SOR_LANE_DRIVE_CURRENT0);
376
377 value = SOR_LANE_PREEMPHASIS_LANE3(0x0f) |
378 SOR_LANE_PREEMPHASIS_LANE2(0x0f) |
379 SOR_LANE_PREEMPHASIS_LANE1(0x0f) |
380 SOR_LANE_PREEMPHASIS_LANE0(0x0f);
381 tegra_sor_writel(sor, value, SOR_LANE_PREEMPHASIS0);
382
383 value = SOR_LANE_POSTCURSOR_LANE3(0x00) |
384 SOR_LANE_POSTCURSOR_LANE2(0x00) |
385 SOR_LANE_POSTCURSOR_LANE1(0x00) |
386 SOR_LANE_POSTCURSOR_LANE0(0x00);
387 tegra_sor_writel(sor, value, SOR_LANE_POSTCURSOR0);
388
389 /* disable LVDS mode */
390 tegra_sor_writel(sor, 0, SOR_LVDS);
391
392 value = tegra_sor_readl(sor, SOR_DP_PADCTL0);
393 value |= SOR_DP_PADCTL_TX_PU_ENABLE;
394 value &= ~SOR_DP_PADCTL_TX_PU_MASK;
395 value |= SOR_DP_PADCTL_TX_PU(2); /* XXX: don't hardcode? */
396 tegra_sor_writel(sor, value, SOR_DP_PADCTL0);
397
398 value = tegra_sor_readl(sor, SOR_DP_PADCTL0);
399 value |= SOR_DP_PADCTL_CM_TXD_3 | SOR_DP_PADCTL_CM_TXD_2 |
400 SOR_DP_PADCTL_CM_TXD_1 | SOR_DP_PADCTL_CM_TXD_0;
401 tegra_sor_writel(sor, value, SOR_DP_PADCTL0);
402
403 usleep_range(10, 100);
404
405 value = tegra_sor_readl(sor, SOR_DP_PADCTL0);
406 value &= ~(SOR_DP_PADCTL_CM_TXD_3 | SOR_DP_PADCTL_CM_TXD_2 |
407 SOR_DP_PADCTL_CM_TXD_1 | SOR_DP_PADCTL_CM_TXD_0);
408 tegra_sor_writel(sor, value, SOR_DP_PADCTL0);
409
410 err = drm_dp_aux_prepare(sor->aux, DP_SET_ANSI_8B10B);
411 if (err < 0)
412 return err;
413
414 for (i = 0, value = 0; i < link->num_lanes; i++) {
415 unsigned long lane = SOR_DP_TPG_CHANNEL_CODING |
416 SOR_DP_TPG_SCRAMBLER_NONE |
417 SOR_DP_TPG_PATTERN_TRAIN1;
418 value = (value << 8) | lane;
419 }
420
421 tegra_sor_writel(sor, value, SOR_DP_TPG);
422
423 pattern = DP_TRAINING_PATTERN_1;
424
425 err = drm_dp_aux_train(sor->aux, link, pattern);
426 if (err < 0)
427 return err;
428
429 value = tegra_sor_readl(sor, SOR_DP_SPARE0);
430 value |= SOR_DP_SPARE_SEQ_ENABLE;
431 value &= ~SOR_DP_SPARE_PANEL_INTERNAL;
432 value |= SOR_DP_SPARE_MACRO_SOR_CLK;
433 tegra_sor_writel(sor, value, SOR_DP_SPARE0);
434
435 for (i = 0, value = 0; i < link->num_lanes; i++) {
436 unsigned long lane = SOR_DP_TPG_CHANNEL_CODING |
437 SOR_DP_TPG_SCRAMBLER_NONE |
438 SOR_DP_TPG_PATTERN_TRAIN2;
439 value = (value << 8) | lane;
440 }
441
442 tegra_sor_writel(sor, value, SOR_DP_TPG);
443
444 pattern = DP_LINK_SCRAMBLING_DISABLE | DP_TRAINING_PATTERN_2;
445
446 err = drm_dp_aux_train(sor->aux, link, pattern);
447 if (err < 0)
448 return err;
449
450 for (i = 0, value = 0; i < link->num_lanes; i++) {
451 unsigned long lane = SOR_DP_TPG_CHANNEL_CODING |
452 SOR_DP_TPG_SCRAMBLER_GALIOS |
453 SOR_DP_TPG_PATTERN_NONE;
454 value = (value << 8) | lane;
455 }
456
457 tegra_sor_writel(sor, value, SOR_DP_TPG);
458
459 pattern = DP_TRAINING_PATTERN_DISABLE;
460
461 err = drm_dp_aux_train(sor->aux, link, pattern);
462 if (err < 0)
463 return err;
464
465 return 0;
466 }
467
468 static void tegra_sor_dp_term_calibrate(struct tegra_sor *sor)
469 {
470 u32 mask = 0x08, adj = 0, value;
471
472 /* enable pad calibration logic */
473 value = tegra_sor_readl(sor, SOR_DP_PADCTL0);
474 value &= ~SOR_DP_PADCTL_PAD_CAL_PD;
475 tegra_sor_writel(sor, value, SOR_DP_PADCTL0);
476
477 value = tegra_sor_readl(sor, SOR_PLL1);
478 value |= SOR_PLL1_TMDS_TERM;
479 tegra_sor_writel(sor, value, SOR_PLL1);
480
481 while (mask) {
482 adj |= mask;
483
484 value = tegra_sor_readl(sor, SOR_PLL1);
485 value &= ~SOR_PLL1_TMDS_TERMADJ_MASK;
486 value |= SOR_PLL1_TMDS_TERMADJ(adj);
487 tegra_sor_writel(sor, value, SOR_PLL1);
488
489 usleep_range(100, 200);
490
491 value = tegra_sor_readl(sor, SOR_PLL1);
492 if (value & SOR_PLL1_TERM_COMPOUT)
493 adj &= ~mask;
494
495 mask >>= 1;
496 }
497
498 value = tegra_sor_readl(sor, SOR_PLL1);
499 value &= ~SOR_PLL1_TMDS_TERMADJ_MASK;
500 value |= SOR_PLL1_TMDS_TERMADJ(adj);
501 tegra_sor_writel(sor, value, SOR_PLL1);
502
503 /* disable pad calibration logic */
504 value = tegra_sor_readl(sor, SOR_DP_PADCTL0);
505 value |= SOR_DP_PADCTL_PAD_CAL_PD;
506 tegra_sor_writel(sor, value, SOR_DP_PADCTL0);
507 }
508
509 static void tegra_sor_super_update(struct tegra_sor *sor)
510 {
511 tegra_sor_writel(sor, 0, SOR_SUPER_STATE0);
512 tegra_sor_writel(sor, 1, SOR_SUPER_STATE0);
513 tegra_sor_writel(sor, 0, SOR_SUPER_STATE0);
514 }
515
516 static void tegra_sor_update(struct tegra_sor *sor)
517 {
518 tegra_sor_writel(sor, 0, SOR_STATE0);
519 tegra_sor_writel(sor, 1, SOR_STATE0);
520 tegra_sor_writel(sor, 0, SOR_STATE0);
521 }
522
523 static int tegra_sor_setup_pwm(struct tegra_sor *sor, unsigned long timeout)
524 {
525 u32 value;
526
527 value = tegra_sor_readl(sor, SOR_PWM_DIV);
528 value &= ~SOR_PWM_DIV_MASK;
529 value |= 0x400; /* period */
530 tegra_sor_writel(sor, value, SOR_PWM_DIV);
531
532 value = tegra_sor_readl(sor, SOR_PWM_CTL);
533 value &= ~SOR_PWM_CTL_DUTY_CYCLE_MASK;
534 value |= 0x400; /* duty cycle */
535 value &= ~SOR_PWM_CTL_CLK_SEL; /* clock source: PCLK */
536 value |= SOR_PWM_CTL_TRIGGER;
537 tegra_sor_writel(sor, value, SOR_PWM_CTL);
538
539 timeout = jiffies + msecs_to_jiffies(timeout);
540
541 while (time_before(jiffies, timeout)) {
542 value = tegra_sor_readl(sor, SOR_PWM_CTL);
543 if ((value & SOR_PWM_CTL_TRIGGER) == 0)
544 return 0;
545
546 usleep_range(25, 100);
547 }
548
549 return -ETIMEDOUT;
550 }
551
552 static int tegra_sor_attach(struct tegra_sor *sor)
553 {
554 unsigned long value, timeout;
555
556 /* wake up in normal mode */
557 value = tegra_sor_readl(sor, SOR_SUPER_STATE1);
558 value |= SOR_SUPER_STATE_HEAD_MODE_AWAKE;
559 value |= SOR_SUPER_STATE_MODE_NORMAL;
560 tegra_sor_writel(sor, value, SOR_SUPER_STATE1);
561 tegra_sor_super_update(sor);
562
563 /* attach */
564 value = tegra_sor_readl(sor, SOR_SUPER_STATE1);
565 value |= SOR_SUPER_STATE_ATTACHED;
566 tegra_sor_writel(sor, value, SOR_SUPER_STATE1);
567 tegra_sor_super_update(sor);
568
569 timeout = jiffies + msecs_to_jiffies(250);
570
571 while (time_before(jiffies, timeout)) {
572 value = tegra_sor_readl(sor, SOR_TEST);
573 if ((value & SOR_TEST_ATTACHED) != 0)
574 return 0;
575
576 usleep_range(25, 100);
577 }
578
579 return -ETIMEDOUT;
580 }
581
582 static int tegra_sor_wakeup(struct tegra_sor *sor)
583 {
584 unsigned long value, timeout;
585
586 timeout = jiffies + msecs_to_jiffies(250);
587
588 /* wait for head to wake up */
589 while (time_before(jiffies, timeout)) {
590 value = tegra_sor_readl(sor, SOR_TEST);
591 value &= SOR_TEST_HEAD_MODE_MASK;
592
593 if (value == SOR_TEST_HEAD_MODE_AWAKE)
594 return 0;
595
596 usleep_range(25, 100);
597 }
598
599 return -ETIMEDOUT;
600 }
601
602 static int tegra_sor_power_up(struct tegra_sor *sor, unsigned long timeout)
603 {
604 u32 value;
605
606 value = tegra_sor_readl(sor, SOR_PWR);
607 value |= SOR_PWR_TRIGGER | SOR_PWR_NORMAL_STATE_PU;
608 tegra_sor_writel(sor, value, SOR_PWR);
609
610 timeout = jiffies + msecs_to_jiffies(timeout);
611
612 while (time_before(jiffies, timeout)) {
613 value = tegra_sor_readl(sor, SOR_PWR);
614 if ((value & SOR_PWR_TRIGGER) == 0)
615 return 0;
616
617 usleep_range(25, 100);
618 }
619
620 return -ETIMEDOUT;
621 }
622
623 struct tegra_sor_params {
624 /* number of link clocks per line */
625 unsigned int num_clocks;
626 /* ratio between input and output */
627 u64 ratio;
628 /* precision factor */
629 u64 precision;
630
631 unsigned int active_polarity;
632 unsigned int active_count;
633 unsigned int active_frac;
634 unsigned int tu_size;
635 unsigned int error;
636 };
637
638 static int tegra_sor_compute_params(struct tegra_sor *sor,
639 struct tegra_sor_params *params,
640 unsigned int tu_size)
641 {
642 u64 active_sym, active_count, frac, approx;
643 u32 active_polarity, active_frac = 0;
644 const u64 f = params->precision;
645 s64 error;
646
647 active_sym = params->ratio * tu_size;
648 active_count = div_u64(active_sym, f) * f;
649 frac = active_sym - active_count;
650
651 /* fraction < 0.5 */
652 if (frac >= (f / 2)) {
653 active_polarity = 1;
654 frac = f - frac;
655 } else {
656 active_polarity = 0;
657 }
658
659 if (frac != 0) {
660 frac = div_u64(f * f, frac); /* 1/fraction */
661 if (frac <= (15 * f)) {
662 active_frac = div_u64(frac, f);
663
664 /* round up */
665 if (active_polarity)
666 active_frac++;
667 } else {
668 active_frac = active_polarity ? 1 : 15;
669 }
670 }
671
672 if (active_frac == 1)
673 active_polarity = 0;
674
675 if (active_polarity == 1) {
676 if (active_frac) {
677 approx = active_count + (active_frac * (f - 1)) * f;
678 approx = div_u64(approx, active_frac * f);
679 } else {
680 approx = active_count + f;
681 }
682 } else {
683 if (active_frac)
684 approx = active_count + div_u64(f, active_frac);
685 else
686 approx = active_count;
687 }
688
689 error = div_s64(active_sym - approx, tu_size);
690 error *= params->num_clocks;
691
692 if (error <= 0 && abs(error) < params->error) {
693 params->active_count = div_u64(active_count, f);
694 params->active_polarity = active_polarity;
695 params->active_frac = active_frac;
696 params->error = abs(error);
697 params->tu_size = tu_size;
698
699 if (error == 0)
700 return true;
701 }
702
703 return false;
704 }
705
706 static int tegra_sor_compute_config(struct tegra_sor *sor,
707 const struct drm_display_mode *mode,
708 struct tegra_sor_config *config,
709 struct drm_dp_link *link)
710 {
711 const u64 f = 100000, link_rate = link->rate * 1000;
712 const u64 pclk = mode->clock * 1000;
713 u64 input, output, watermark, num;
714 struct tegra_sor_params params;
715 u32 num_syms_per_line;
716 unsigned int i;
717
718 if (!link_rate || !link->num_lanes || !pclk || !config->bits_per_pixel)
719 return -EINVAL;
720
721 output = link_rate * 8 * link->num_lanes;
722 input = pclk * config->bits_per_pixel;
723
724 if (input >= output)
725 return -ERANGE;
726
727 memset(&params, 0, sizeof(params));
728 params.ratio = div64_u64(input * f, output);
729 params.num_clocks = div_u64(link_rate * mode->hdisplay, pclk);
730 params.precision = f;
731 params.error = 64 * f;
732 params.tu_size = 64;
733
734 for (i = params.tu_size; i >= 32; i--)
735 if (tegra_sor_compute_params(sor, &params, i))
736 break;
737
738 if (params.active_frac == 0) {
739 config->active_polarity = 0;
740 config->active_count = params.active_count;
741
742 if (!params.active_polarity)
743 config->active_count--;
744
745 config->tu_size = params.tu_size;
746 config->active_frac = 1;
747 } else {
748 config->active_polarity = params.active_polarity;
749 config->active_count = params.active_count;
750 config->active_frac = params.active_frac;
751 config->tu_size = params.tu_size;
752 }
753
754 dev_dbg(sor->dev,
755 "polarity: %d active count: %d tu size: %d active frac: %d\n",
756 config->active_polarity, config->active_count,
757 config->tu_size, config->active_frac);
758
759 watermark = params.ratio * config->tu_size * (f - params.ratio);
760 watermark = div_u64(watermark, f);
761
762 watermark = div_u64(watermark + params.error, f);
763 config->watermark = watermark + (config->bits_per_pixel / 8) + 2;
764 num_syms_per_line = (mode->hdisplay * config->bits_per_pixel) *
765 (link->num_lanes * 8);
766
767 if (config->watermark > 30) {
768 config->watermark = 30;
769 dev_err(sor->dev,
770 "unable to compute TU size, forcing watermark to %u\n",
771 config->watermark);
772 } else if (config->watermark > num_syms_per_line) {
773 config->watermark = num_syms_per_line;
774 dev_err(sor->dev, "watermark too high, forcing to %u\n",
775 config->watermark);
776 }
777
778 /* compute the number of symbols per horizontal blanking interval */
779 num = ((mode->htotal - mode->hdisplay) - 7) * link_rate;
780 config->hblank_symbols = div_u64(num, pclk);
781
782 if (link->capabilities & DP_LINK_CAP_ENHANCED_FRAMING)
783 config->hblank_symbols -= 3;
784
785 config->hblank_symbols -= 12 / link->num_lanes;
786
787 /* compute the number of symbols per vertical blanking interval */
788 num = (mode->hdisplay - 25) * link_rate;
789 config->vblank_symbols = div_u64(num, pclk);
790 config->vblank_symbols -= 36 / link->num_lanes + 4;
791
792 dev_dbg(sor->dev, "blank symbols: H:%u V:%u\n", config->hblank_symbols,
793 config->vblank_symbols);
794
795 return 0;
796 }
797
798 static void tegra_sor_apply_config(struct tegra_sor *sor,
799 const struct tegra_sor_config *config)
800 {
801 u32 value;
802
803 value = tegra_sor_readl(sor, SOR_DP_LINKCTL0);
804 value &= ~SOR_DP_LINKCTL_TU_SIZE_MASK;
805 value |= SOR_DP_LINKCTL_TU_SIZE(config->tu_size);
806 tegra_sor_writel(sor, value, SOR_DP_LINKCTL0);
807
808 value = tegra_sor_readl(sor, SOR_DP_CONFIG0);
809 value &= ~SOR_DP_CONFIG_WATERMARK_MASK;
810 value |= SOR_DP_CONFIG_WATERMARK(config->watermark);
811
812 value &= ~SOR_DP_CONFIG_ACTIVE_SYM_COUNT_MASK;
813 value |= SOR_DP_CONFIG_ACTIVE_SYM_COUNT(config->active_count);
814
815 value &= ~SOR_DP_CONFIG_ACTIVE_SYM_FRAC_MASK;
816 value |= SOR_DP_CONFIG_ACTIVE_SYM_FRAC(config->active_frac);
817
818 if (config->active_polarity)
819 value |= SOR_DP_CONFIG_ACTIVE_SYM_POLARITY;
820 else
821 value &= ~SOR_DP_CONFIG_ACTIVE_SYM_POLARITY;
822
823 value |= SOR_DP_CONFIG_ACTIVE_SYM_ENABLE;
824 value |= SOR_DP_CONFIG_DISPARITY_NEGATIVE;
825 tegra_sor_writel(sor, value, SOR_DP_CONFIG0);
826
827 value = tegra_sor_readl(sor, SOR_DP_AUDIO_HBLANK_SYMBOLS);
828 value &= ~SOR_DP_AUDIO_HBLANK_SYMBOLS_MASK;
829 value |= config->hblank_symbols & 0xffff;
830 tegra_sor_writel(sor, value, SOR_DP_AUDIO_HBLANK_SYMBOLS);
831
832 value = tegra_sor_readl(sor, SOR_DP_AUDIO_VBLANK_SYMBOLS);
833 value &= ~SOR_DP_AUDIO_VBLANK_SYMBOLS_MASK;
834 value |= config->vblank_symbols & 0xffff;
835 tegra_sor_writel(sor, value, SOR_DP_AUDIO_VBLANK_SYMBOLS);
836 }
837
838 static void tegra_sor_mode_set(struct tegra_sor *sor,
839 const struct drm_display_mode *mode,
840 struct tegra_sor_state *state)
841 {
842 struct tegra_dc *dc = to_tegra_dc(sor->output.encoder.crtc);
843 unsigned int vbe, vse, hbe, hse, vbs, hbs;
844 u32 value;
845
846 value = tegra_sor_readl(sor, SOR_STATE1);
847 value &= ~SOR_STATE_ASY_PIXELDEPTH_MASK;
848 value &= ~SOR_STATE_ASY_CRC_MODE_MASK;
849 value &= ~SOR_STATE_ASY_OWNER_MASK;
850
851 value |= SOR_STATE_ASY_CRC_MODE_COMPLETE |
852 SOR_STATE_ASY_OWNER(dc->pipe + 1);
853
854 if (mode->flags & DRM_MODE_FLAG_PHSYNC)
855 value &= ~SOR_STATE_ASY_HSYNCPOL;
856
857 if (mode->flags & DRM_MODE_FLAG_NHSYNC)
858 value |= SOR_STATE_ASY_HSYNCPOL;
859
860 if (mode->flags & DRM_MODE_FLAG_PVSYNC)
861 value &= ~SOR_STATE_ASY_VSYNCPOL;
862
863 if (mode->flags & DRM_MODE_FLAG_NVSYNC)
864 value |= SOR_STATE_ASY_VSYNCPOL;
865
866 switch (state->bpc) {
867 case 16:
868 value |= SOR_STATE_ASY_PIXELDEPTH_BPP_48_444;
869 break;
870
871 case 12:
872 value |= SOR_STATE_ASY_PIXELDEPTH_BPP_36_444;
873 break;
874
875 case 10:
876 value |= SOR_STATE_ASY_PIXELDEPTH_BPP_30_444;
877 break;
878
879 case 8:
880 value |= SOR_STATE_ASY_PIXELDEPTH_BPP_24_444;
881 break;
882
883 case 6:
884 value |= SOR_STATE_ASY_PIXELDEPTH_BPP_18_444;
885 break;
886
887 default:
888 value |= SOR_STATE_ASY_PIXELDEPTH_BPP_24_444;
889 break;
890 }
891
892 tegra_sor_writel(sor, value, SOR_STATE1);
893
894 /*
895 * TODO: The video timing programming below doesn't seem to match the
896 * register definitions.
897 */
898
899 value = ((mode->vtotal & 0x7fff) << 16) | (mode->htotal & 0x7fff);
900 tegra_sor_writel(sor, value, SOR_HEAD_STATE1(dc->pipe));
901
902 /* sync end = sync width - 1 */
903 vse = mode->vsync_end - mode->vsync_start - 1;
904 hse = mode->hsync_end - mode->hsync_start - 1;
905
906 value = ((vse & 0x7fff) << 16) | (hse & 0x7fff);
907 tegra_sor_writel(sor, value, SOR_HEAD_STATE2(dc->pipe));
908
909 /* blank end = sync end + back porch */
910 vbe = vse + (mode->vtotal - mode->vsync_end);
911 hbe = hse + (mode->htotal - mode->hsync_end);
912
913 value = ((vbe & 0x7fff) << 16) | (hbe & 0x7fff);
914 tegra_sor_writel(sor, value, SOR_HEAD_STATE3(dc->pipe));
915
916 /* blank start = blank end + active */
917 vbs = vbe + mode->vdisplay;
918 hbs = hbe + mode->hdisplay;
919
920 value = ((vbs & 0x7fff) << 16) | (hbs & 0x7fff);
921 tegra_sor_writel(sor, value, SOR_HEAD_STATE4(dc->pipe));
922
923 /* XXX interlacing support */
924 tegra_sor_writel(sor, 0x001, SOR_HEAD_STATE5(dc->pipe));
925 }
926
927 static int tegra_sor_detach(struct tegra_sor *sor)
928 {
929 unsigned long value, timeout;
930
931 /* switch to safe mode */
932 value = tegra_sor_readl(sor, SOR_SUPER_STATE1);
933 value &= ~SOR_SUPER_STATE_MODE_NORMAL;
934 tegra_sor_writel(sor, value, SOR_SUPER_STATE1);
935 tegra_sor_super_update(sor);
936
937 timeout = jiffies + msecs_to_jiffies(250);
938
939 while (time_before(jiffies, timeout)) {
940 value = tegra_sor_readl(sor, SOR_PWR);
941 if (value & SOR_PWR_MODE_SAFE)
942 break;
943 }
944
945 if ((value & SOR_PWR_MODE_SAFE) == 0)
946 return -ETIMEDOUT;
947
948 /* go to sleep */
949 value = tegra_sor_readl(sor, SOR_SUPER_STATE1);
950 value &= ~SOR_SUPER_STATE_HEAD_MODE_MASK;
951 tegra_sor_writel(sor, value, SOR_SUPER_STATE1);
952 tegra_sor_super_update(sor);
953
954 /* detach */
955 value = tegra_sor_readl(sor, SOR_SUPER_STATE1);
956 value &= ~SOR_SUPER_STATE_ATTACHED;
957 tegra_sor_writel(sor, value, SOR_SUPER_STATE1);
958 tegra_sor_super_update(sor);
959
960 timeout = jiffies + msecs_to_jiffies(250);
961
962 while (time_before(jiffies, timeout)) {
963 value = tegra_sor_readl(sor, SOR_TEST);
964 if ((value & SOR_TEST_ATTACHED) == 0)
965 break;
966
967 usleep_range(25, 100);
968 }
969
970 if ((value & SOR_TEST_ATTACHED) != 0)
971 return -ETIMEDOUT;
972
973 return 0;
974 }
975
976 static int tegra_sor_power_down(struct tegra_sor *sor)
977 {
978 unsigned long value, timeout;
979 int err;
980
981 value = tegra_sor_readl(sor, SOR_PWR);
982 value &= ~SOR_PWR_NORMAL_STATE_PU;
983 value |= SOR_PWR_TRIGGER;
984 tegra_sor_writel(sor, value, SOR_PWR);
985
986 timeout = jiffies + msecs_to_jiffies(250);
987
988 while (time_before(jiffies, timeout)) {
989 value = tegra_sor_readl(sor, SOR_PWR);
990 if ((value & SOR_PWR_TRIGGER) == 0)
991 return 0;
992
993 usleep_range(25, 100);
994 }
995
996 if ((value & SOR_PWR_TRIGGER) != 0)
997 return -ETIMEDOUT;
998
999 /* switch to safe parent clock */
1000 err = tegra_sor_set_parent_clock(sor, sor->clk_safe);
1001 if (err < 0) {
1002 dev_err(sor->dev, "failed to set safe parent clock: %d\n", err);
1003 return err;
1004 }
1005
1006 value = tegra_sor_readl(sor, SOR_DP_PADCTL0);
1007 value &= ~(SOR_DP_PADCTL_PD_TXD_3 | SOR_DP_PADCTL_PD_TXD_0 |
1008 SOR_DP_PADCTL_PD_TXD_1 | SOR_DP_PADCTL_PD_TXD_2);
1009 tegra_sor_writel(sor, value, SOR_DP_PADCTL0);
1010
1011 /* stop lane sequencer */
1012 value = SOR_LANE_SEQ_CTL_TRIGGER | SOR_LANE_SEQ_CTL_SEQUENCE_UP |
1013 SOR_LANE_SEQ_CTL_POWER_STATE_DOWN;
1014 tegra_sor_writel(sor, value, SOR_LANE_SEQ_CTL);
1015
1016 timeout = jiffies + msecs_to_jiffies(250);
1017
1018 while (time_before(jiffies, timeout)) {
1019 value = tegra_sor_readl(sor, SOR_LANE_SEQ_CTL);
1020 if ((value & SOR_LANE_SEQ_CTL_TRIGGER) == 0)
1021 break;
1022
1023 usleep_range(25, 100);
1024 }
1025
1026 if ((value & SOR_LANE_SEQ_CTL_TRIGGER) != 0)
1027 return -ETIMEDOUT;
1028
1029 value = tegra_sor_readl(sor, SOR_PLL2);
1030 value |= SOR_PLL2_PORT_POWERDOWN;
1031 tegra_sor_writel(sor, value, SOR_PLL2);
1032
1033 usleep_range(20, 100);
1034
1035 value = tegra_sor_readl(sor, SOR_PLL0);
1036 value |= SOR_PLL0_VCOPD | SOR_PLL0_PWR;
1037 tegra_sor_writel(sor, value, SOR_PLL0);
1038
1039 value = tegra_sor_readl(sor, SOR_PLL2);
1040 value |= SOR_PLL2_SEQ_PLLCAPPD;
1041 value |= SOR_PLL2_SEQ_PLLCAPPD_ENFORCE;
1042 tegra_sor_writel(sor, value, SOR_PLL2);
1043
1044 usleep_range(20, 100);
1045
1046 return 0;
1047 }
1048
1049 static int tegra_sor_crc_wait(struct tegra_sor *sor, unsigned long timeout)
1050 {
1051 u32 value;
1052
1053 timeout = jiffies + msecs_to_jiffies(timeout);
1054
1055 while (time_before(jiffies, timeout)) {
1056 value = tegra_sor_readl(sor, SOR_CRCA);
1057 if (value & SOR_CRCA_VALID)
1058 return 0;
1059
1060 usleep_range(100, 200);
1061 }
1062
1063 return -ETIMEDOUT;
1064 }
1065
1066 static int tegra_sor_show_crc(struct seq_file *s, void *data)
1067 {
1068 struct drm_info_node *node = s->private;
1069 struct tegra_sor *sor = node->info_ent->data;
1070 struct drm_crtc *crtc = sor->output.encoder.crtc;
1071 struct drm_device *drm = node->minor->dev;
1072 int err = 0;
1073 u32 value;
1074
1075 drm_modeset_lock_all(drm);
1076
1077 if (!crtc || !crtc->state->active) {
1078 err = -EBUSY;
1079 goto unlock;
1080 }
1081
1082 value = tegra_sor_readl(sor, SOR_STATE1);
1083 value &= ~SOR_STATE_ASY_CRC_MODE_MASK;
1084 tegra_sor_writel(sor, value, SOR_STATE1);
1085
1086 value = tegra_sor_readl(sor, SOR_CRC_CNTRL);
1087 value |= SOR_CRC_CNTRL_ENABLE;
1088 tegra_sor_writel(sor, value, SOR_CRC_CNTRL);
1089
1090 value = tegra_sor_readl(sor, SOR_TEST);
1091 value &= ~SOR_TEST_CRC_POST_SERIALIZE;
1092 tegra_sor_writel(sor, value, SOR_TEST);
1093
1094 err = tegra_sor_crc_wait(sor, 100);
1095 if (err < 0)
1096 goto unlock;
1097
1098 tegra_sor_writel(sor, SOR_CRCA_RESET, SOR_CRCA);
1099 value = tegra_sor_readl(sor, SOR_CRCB);
1100
1101 seq_printf(s, "%08x\n", value);
1102
1103 unlock:
1104 drm_modeset_unlock_all(drm);
1105 return err;
1106 }
1107
1108 static int tegra_sor_show_regs(struct seq_file *s, void *data)
1109 {
1110 struct drm_info_node *node = s->private;
1111 struct tegra_sor *sor = node->info_ent->data;
1112 struct drm_crtc *crtc = sor->output.encoder.crtc;
1113 struct drm_device *drm = node->minor->dev;
1114 int err = 0;
1115
1116 drm_modeset_lock_all(drm);
1117
1118 if (!crtc || !crtc->state->active) {
1119 err = -EBUSY;
1120 goto unlock;
1121 }
1122
1123 #define DUMP_REG(name) \
1124 seq_printf(s, "%-38s %#05x %08x\n", #name, name, \
1125 tegra_sor_readl(sor, name))
1126
1127 DUMP_REG(SOR_CTXSW);
1128 DUMP_REG(SOR_SUPER_STATE0);
1129 DUMP_REG(SOR_SUPER_STATE1);
1130 DUMP_REG(SOR_STATE0);
1131 DUMP_REG(SOR_STATE1);
1132 DUMP_REG(SOR_HEAD_STATE0(0));
1133 DUMP_REG(SOR_HEAD_STATE0(1));
1134 DUMP_REG(SOR_HEAD_STATE1(0));
1135 DUMP_REG(SOR_HEAD_STATE1(1));
1136 DUMP_REG(SOR_HEAD_STATE2(0));
1137 DUMP_REG(SOR_HEAD_STATE2(1));
1138 DUMP_REG(SOR_HEAD_STATE3(0));
1139 DUMP_REG(SOR_HEAD_STATE3(1));
1140 DUMP_REG(SOR_HEAD_STATE4(0));
1141 DUMP_REG(SOR_HEAD_STATE4(1));
1142 DUMP_REG(SOR_HEAD_STATE5(0));
1143 DUMP_REG(SOR_HEAD_STATE5(1));
1144 DUMP_REG(SOR_CRC_CNTRL);
1145 DUMP_REG(SOR_DP_DEBUG_MVID);
1146 DUMP_REG(SOR_CLK_CNTRL);
1147 DUMP_REG(SOR_CAP);
1148 DUMP_REG(SOR_PWR);
1149 DUMP_REG(SOR_TEST);
1150 DUMP_REG(SOR_PLL0);
1151 DUMP_REG(SOR_PLL1);
1152 DUMP_REG(SOR_PLL2);
1153 DUMP_REG(SOR_PLL3);
1154 DUMP_REG(SOR_CSTM);
1155 DUMP_REG(SOR_LVDS);
1156 DUMP_REG(SOR_CRCA);
1157 DUMP_REG(SOR_CRCB);
1158 DUMP_REG(SOR_BLANK);
1159 DUMP_REG(SOR_SEQ_CTL);
1160 DUMP_REG(SOR_LANE_SEQ_CTL);
1161 DUMP_REG(SOR_SEQ_INST(0));
1162 DUMP_REG(SOR_SEQ_INST(1));
1163 DUMP_REG(SOR_SEQ_INST(2));
1164 DUMP_REG(SOR_SEQ_INST(3));
1165 DUMP_REG(SOR_SEQ_INST(4));
1166 DUMP_REG(SOR_SEQ_INST(5));
1167 DUMP_REG(SOR_SEQ_INST(6));
1168 DUMP_REG(SOR_SEQ_INST(7));
1169 DUMP_REG(SOR_SEQ_INST(8));
1170 DUMP_REG(SOR_SEQ_INST(9));
1171 DUMP_REG(SOR_SEQ_INST(10));
1172 DUMP_REG(SOR_SEQ_INST(11));
1173 DUMP_REG(SOR_SEQ_INST(12));
1174 DUMP_REG(SOR_SEQ_INST(13));
1175 DUMP_REG(SOR_SEQ_INST(14));
1176 DUMP_REG(SOR_SEQ_INST(15));
1177 DUMP_REG(SOR_PWM_DIV);
1178 DUMP_REG(SOR_PWM_CTL);
1179 DUMP_REG(SOR_VCRC_A0);
1180 DUMP_REG(SOR_VCRC_A1);
1181 DUMP_REG(SOR_VCRC_B0);
1182 DUMP_REG(SOR_VCRC_B1);
1183 DUMP_REG(SOR_CCRC_A0);
1184 DUMP_REG(SOR_CCRC_A1);
1185 DUMP_REG(SOR_CCRC_B0);
1186 DUMP_REG(SOR_CCRC_B1);
1187 DUMP_REG(SOR_EDATA_A0);
1188 DUMP_REG(SOR_EDATA_A1);
1189 DUMP_REG(SOR_EDATA_B0);
1190 DUMP_REG(SOR_EDATA_B1);
1191 DUMP_REG(SOR_COUNT_A0);
1192 DUMP_REG(SOR_COUNT_A1);
1193 DUMP_REG(SOR_COUNT_B0);
1194 DUMP_REG(SOR_COUNT_B1);
1195 DUMP_REG(SOR_DEBUG_A0);
1196 DUMP_REG(SOR_DEBUG_A1);
1197 DUMP_REG(SOR_DEBUG_B0);
1198 DUMP_REG(SOR_DEBUG_B1);
1199 DUMP_REG(SOR_TRIG);
1200 DUMP_REG(SOR_MSCHECK);
1201 DUMP_REG(SOR_XBAR_CTRL);
1202 DUMP_REG(SOR_XBAR_POL);
1203 DUMP_REG(SOR_DP_LINKCTL0);
1204 DUMP_REG(SOR_DP_LINKCTL1);
1205 DUMP_REG(SOR_LANE_DRIVE_CURRENT0);
1206 DUMP_REG(SOR_LANE_DRIVE_CURRENT1);
1207 DUMP_REG(SOR_LANE4_DRIVE_CURRENT0);
1208 DUMP_REG(SOR_LANE4_DRIVE_CURRENT1);
1209 DUMP_REG(SOR_LANE_PREEMPHASIS0);
1210 DUMP_REG(SOR_LANE_PREEMPHASIS1);
1211 DUMP_REG(SOR_LANE4_PREEMPHASIS0);
1212 DUMP_REG(SOR_LANE4_PREEMPHASIS1);
1213 DUMP_REG(SOR_LANE_POSTCURSOR0);
1214 DUMP_REG(SOR_LANE_POSTCURSOR1);
1215 DUMP_REG(SOR_DP_CONFIG0);
1216 DUMP_REG(SOR_DP_CONFIG1);
1217 DUMP_REG(SOR_DP_MN0);
1218 DUMP_REG(SOR_DP_MN1);
1219 DUMP_REG(SOR_DP_PADCTL0);
1220 DUMP_REG(SOR_DP_PADCTL1);
1221 DUMP_REG(SOR_DP_DEBUG0);
1222 DUMP_REG(SOR_DP_DEBUG1);
1223 DUMP_REG(SOR_DP_SPARE0);
1224 DUMP_REG(SOR_DP_SPARE1);
1225 DUMP_REG(SOR_DP_AUDIO_CTRL);
1226 DUMP_REG(SOR_DP_AUDIO_HBLANK_SYMBOLS);
1227 DUMP_REG(SOR_DP_AUDIO_VBLANK_SYMBOLS);
1228 DUMP_REG(SOR_DP_GENERIC_INFOFRAME_HEADER);
1229 DUMP_REG(SOR_DP_GENERIC_INFOFRAME_SUBPACK0);
1230 DUMP_REG(SOR_DP_GENERIC_INFOFRAME_SUBPACK1);
1231 DUMP_REG(SOR_DP_GENERIC_INFOFRAME_SUBPACK2);
1232 DUMP_REG(SOR_DP_GENERIC_INFOFRAME_SUBPACK3);
1233 DUMP_REG(SOR_DP_GENERIC_INFOFRAME_SUBPACK4);
1234 DUMP_REG(SOR_DP_GENERIC_INFOFRAME_SUBPACK5);
1235 DUMP_REG(SOR_DP_GENERIC_INFOFRAME_SUBPACK6);
1236 DUMP_REG(SOR_DP_TPG);
1237 DUMP_REG(SOR_DP_TPG_CONFIG);
1238 DUMP_REG(SOR_DP_LQ_CSTM0);
1239 DUMP_REG(SOR_DP_LQ_CSTM1);
1240 DUMP_REG(SOR_DP_LQ_CSTM2);
1241
1242 #undef DUMP_REG
1243
1244 unlock:
1245 drm_modeset_unlock_all(drm);
1246 return err;
1247 }
1248
1249 static const struct drm_info_list debugfs_files[] = {
1250 { "crc", tegra_sor_show_crc, 0, NULL },
1251 { "regs", tegra_sor_show_regs, 0, NULL },
1252 };
1253
1254 static int tegra_sor_debugfs_init(struct tegra_sor *sor,
1255 struct drm_minor *minor)
1256 {
1257 const char *name = sor->soc->supports_dp ? "sor1" : "sor";
1258 unsigned int i;
1259 int err;
1260
1261 sor->debugfs = debugfs_create_dir(name, minor->debugfs_root);
1262 if (!sor->debugfs)
1263 return -ENOMEM;
1264
1265 sor->debugfs_files = kmemdup(debugfs_files, sizeof(debugfs_files),
1266 GFP_KERNEL);
1267 if (!sor->debugfs_files) {
1268 err = -ENOMEM;
1269 goto remove;
1270 }
1271
1272 for (i = 0; i < ARRAY_SIZE(debugfs_files); i++)
1273 sor->debugfs_files[i].data = sor;
1274
1275 err = drm_debugfs_create_files(sor->debugfs_files,
1276 ARRAY_SIZE(debugfs_files),
1277 sor->debugfs, minor);
1278 if (err < 0)
1279 goto free;
1280
1281 sor->minor = minor;
1282
1283 return 0;
1284
1285 free:
1286 kfree(sor->debugfs_files);
1287 sor->debugfs_files = NULL;
1288 remove:
1289 debugfs_remove_recursive(sor->debugfs);
1290 sor->debugfs = NULL;
1291 return err;
1292 }
1293
1294 static void tegra_sor_debugfs_exit(struct tegra_sor *sor)
1295 {
1296 drm_debugfs_remove_files(sor->debugfs_files, ARRAY_SIZE(debugfs_files),
1297 sor->minor);
1298 sor->minor = NULL;
1299
1300 kfree(sor->debugfs_files);
1301 sor->debugfs_files = NULL;
1302
1303 debugfs_remove_recursive(sor->debugfs);
1304 sor->debugfs = NULL;
1305 }
1306
1307 static void tegra_sor_connector_reset(struct drm_connector *connector)
1308 {
1309 struct tegra_sor_state *state;
1310
1311 state = kzalloc(sizeof(*state), GFP_KERNEL);
1312 if (!state)
1313 return;
1314
1315 if (connector->state) {
1316 __drm_atomic_helper_connector_destroy_state(connector->state);
1317 kfree(connector->state);
1318 }
1319
1320 __drm_atomic_helper_connector_reset(connector, &state->base);
1321 }
1322
1323 static enum drm_connector_status
1324 tegra_sor_connector_detect(struct drm_connector *connector, bool force)
1325 {
1326 struct tegra_output *output = connector_to_output(connector);
1327 struct tegra_sor *sor = to_sor(output);
1328
1329 if (sor->aux)
1330 return drm_dp_aux_detect(sor->aux);
1331
1332 return tegra_output_connector_detect(connector, force);
1333 }
1334
1335 static struct drm_connector_state *
1336 tegra_sor_connector_duplicate_state(struct drm_connector *connector)
1337 {
1338 struct tegra_sor_state *state = to_sor_state(connector->state);
1339 struct tegra_sor_state *copy;
1340
1341 copy = kmemdup(state, sizeof(*state), GFP_KERNEL);
1342 if (!copy)
1343 return NULL;
1344
1345 __drm_atomic_helper_connector_duplicate_state(connector, &copy->base);
1346
1347 return &copy->base;
1348 }
1349
1350 static const struct drm_connector_funcs tegra_sor_connector_funcs = {
1351 .reset = tegra_sor_connector_reset,
1352 .detect = tegra_sor_connector_detect,
1353 .fill_modes = drm_helper_probe_single_connector_modes,
1354 .destroy = tegra_output_connector_destroy,
1355 .atomic_duplicate_state = tegra_sor_connector_duplicate_state,
1356 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
1357 };
1358
1359 static int tegra_sor_connector_get_modes(struct drm_connector *connector)
1360 {
1361 struct tegra_output *output = connector_to_output(connector);
1362 struct tegra_sor *sor = to_sor(output);
1363 int err;
1364
1365 if (sor->aux)
1366 drm_dp_aux_enable(sor->aux);
1367
1368 err = tegra_output_connector_get_modes(connector);
1369
1370 if (sor->aux)
1371 drm_dp_aux_disable(sor->aux);
1372
1373 return err;
1374 }
1375
1376 static enum drm_mode_status
1377 tegra_sor_connector_mode_valid(struct drm_connector *connector,
1378 struct drm_display_mode *mode)
1379 {
1380 /* HDMI 2.0 modes are not yet supported */
1381 if (mode->clock > 340000)
1382 return MODE_NOCLOCK;
1383
1384 return MODE_OK;
1385 }
1386
1387 static const struct drm_connector_helper_funcs tegra_sor_connector_helper_funcs = {
1388 .get_modes = tegra_sor_connector_get_modes,
1389 .mode_valid = tegra_sor_connector_mode_valid,
1390 };
1391
1392 static const struct drm_encoder_funcs tegra_sor_encoder_funcs = {
1393 .destroy = tegra_output_encoder_destroy,
1394 };
1395
1396 static void tegra_sor_edp_disable(struct drm_encoder *encoder)
1397 {
1398 struct tegra_output *output = encoder_to_output(encoder);
1399 struct tegra_dc *dc = to_tegra_dc(encoder->crtc);
1400 struct tegra_sor *sor = to_sor(output);
1401 u32 value;
1402 int err;
1403
1404 if (output->panel)
1405 drm_panel_disable(output->panel);
1406
1407 err = tegra_sor_detach(sor);
1408 if (err < 0)
1409 dev_err(sor->dev, "failed to detach SOR: %d\n", err);
1410
1411 tegra_sor_writel(sor, 0, SOR_STATE1);
1412 tegra_sor_update(sor);
1413
1414 /*
1415 * The following accesses registers of the display controller, so make
1416 * sure it's only executed when the output is attached to one.
1417 */
1418 if (dc) {
1419 value = tegra_dc_readl(dc, DC_DISP_DISP_WIN_OPTIONS);
1420 value &= ~SOR_ENABLE;
1421 tegra_dc_writel(dc, value, DC_DISP_DISP_WIN_OPTIONS);
1422
1423 tegra_dc_commit(dc);
1424 }
1425
1426 err = tegra_sor_power_down(sor);
1427 if (err < 0)
1428 dev_err(sor->dev, "failed to power down SOR: %d\n", err);
1429
1430 if (sor->aux) {
1431 err = drm_dp_aux_disable(sor->aux);
1432 if (err < 0)
1433 dev_err(sor->dev, "failed to disable DP: %d\n", err);
1434 }
1435
1436 err = tegra_io_rail_power_off(TEGRA_IO_RAIL_LVDS);
1437 if (err < 0)
1438 dev_err(sor->dev, "failed to power off I/O rail: %d\n", err);
1439
1440 if (output->panel)
1441 drm_panel_unprepare(output->panel);
1442
1443 pm_runtime_put(sor->dev);
1444 }
1445
1446 #if 0
1447 static int calc_h_ref_to_sync(const struct drm_display_mode *mode,
1448 unsigned int *value)
1449 {
1450 unsigned int hfp, hsw, hbp, a = 0, b;
1451
1452 hfp = mode->hsync_start - mode->hdisplay;
1453 hsw = mode->hsync_end - mode->hsync_start;
1454 hbp = mode->htotal - mode->hsync_end;
1455
1456 pr_info("hfp: %u, hsw: %u, hbp: %u\n", hfp, hsw, hbp);
1457
1458 b = hfp - 1;
1459
1460 pr_info("a: %u, b: %u\n", a, b);
1461 pr_info("a + hsw + hbp = %u\n", a + hsw + hbp);
1462
1463 if (a + hsw + hbp <= 11) {
1464 a = 1 + 11 - hsw - hbp;
1465 pr_info("a: %u\n", a);
1466 }
1467
1468 if (a > b)
1469 return -EINVAL;
1470
1471 if (hsw < 1)
1472 return -EINVAL;
1473
1474 if (mode->hdisplay < 16)
1475 return -EINVAL;
1476
1477 if (value) {
1478 if (b > a && a % 2)
1479 *value = a + 1;
1480 else
1481 *value = a;
1482 }
1483
1484 return 0;
1485 }
1486 #endif
1487
1488 static void tegra_sor_edp_enable(struct drm_encoder *encoder)
1489 {
1490 struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
1491 struct tegra_output *output = encoder_to_output(encoder);
1492 struct tegra_dc *dc = to_tegra_dc(encoder->crtc);
1493 struct tegra_sor *sor = to_sor(output);
1494 struct tegra_sor_config config;
1495 struct tegra_sor_state *state;
1496 struct drm_dp_link link;
1497 u8 rate, lanes;
1498 unsigned int i;
1499 int err = 0;
1500 u32 value;
1501
1502 state = to_sor_state(output->connector.state);
1503
1504 pm_runtime_get_sync(sor->dev);
1505
1506 if (output->panel)
1507 drm_panel_prepare(output->panel);
1508
1509 err = drm_dp_aux_enable(sor->aux);
1510 if (err < 0)
1511 dev_err(sor->dev, "failed to enable DP: %d\n", err);
1512
1513 err = drm_dp_link_probe(sor->aux, &link);
1514 if (err < 0) {
1515 dev_err(sor->dev, "failed to probe eDP link: %d\n", err);
1516 return;
1517 }
1518
1519 /* switch to safe parent clock */
1520 err = tegra_sor_set_parent_clock(sor, sor->clk_safe);
1521 if (err < 0)
1522 dev_err(sor->dev, "failed to set safe parent clock: %d\n", err);
1523
1524 memset(&config, 0, sizeof(config));
1525 config.bits_per_pixel = state->bpc * 3;
1526
1527 err = tegra_sor_compute_config(sor, mode, &config, &link);
1528 if (err < 0)
1529 dev_err(sor->dev, "failed to compute configuration: %d\n", err);
1530
1531 value = tegra_sor_readl(sor, SOR_CLK_CNTRL);
1532 value &= ~SOR_CLK_CNTRL_DP_CLK_SEL_MASK;
1533 value |= SOR_CLK_CNTRL_DP_CLK_SEL_SINGLE_DPCLK;
1534 tegra_sor_writel(sor, value, SOR_CLK_CNTRL);
1535
1536 value = tegra_sor_readl(sor, SOR_PLL2);
1537 value &= ~SOR_PLL2_BANDGAP_POWERDOWN;
1538 tegra_sor_writel(sor, value, SOR_PLL2);
1539 usleep_range(20, 100);
1540
1541 value = tegra_sor_readl(sor, SOR_PLL3);
1542 value |= SOR_PLL3_PLL_VDD_MODE_3V3;
1543 tegra_sor_writel(sor, value, SOR_PLL3);
1544
1545 value = SOR_PLL0_ICHPMP(0xf) | SOR_PLL0_VCOCAP_RST |
1546 SOR_PLL0_PLLREG_LEVEL_V45 | SOR_PLL0_RESISTOR_EXT;
1547 tegra_sor_writel(sor, value, SOR_PLL0);
1548
1549 value = tegra_sor_readl(sor, SOR_PLL2);
1550 value |= SOR_PLL2_SEQ_PLLCAPPD;
1551 value &= ~SOR_PLL2_SEQ_PLLCAPPD_ENFORCE;
1552 value |= SOR_PLL2_LVDS_ENABLE;
1553 tegra_sor_writel(sor, value, SOR_PLL2);
1554
1555 value = SOR_PLL1_TERM_COMPOUT | SOR_PLL1_TMDS_TERM;
1556 tegra_sor_writel(sor, value, SOR_PLL1);
1557
1558 while (true) {
1559 value = tegra_sor_readl(sor, SOR_PLL2);
1560 if ((value & SOR_PLL2_SEQ_PLLCAPPD_ENFORCE) == 0)
1561 break;
1562
1563 usleep_range(250, 1000);
1564 }
1565
1566 value = tegra_sor_readl(sor, SOR_PLL2);
1567 value &= ~SOR_PLL2_POWERDOWN_OVERRIDE;
1568 value &= ~SOR_PLL2_PORT_POWERDOWN;
1569 tegra_sor_writel(sor, value, SOR_PLL2);
1570
1571 /*
1572 * power up
1573 */
1574
1575 /* set safe link bandwidth (1.62 Gbps) */
1576 value = tegra_sor_readl(sor, SOR_CLK_CNTRL);
1577 value &= ~SOR_CLK_CNTRL_DP_LINK_SPEED_MASK;
1578 value |= SOR_CLK_CNTRL_DP_LINK_SPEED_G1_62;
1579 tegra_sor_writel(sor, value, SOR_CLK_CNTRL);
1580
1581 /* step 1 */
1582 value = tegra_sor_readl(sor, SOR_PLL2);
1583 value |= SOR_PLL2_SEQ_PLLCAPPD_ENFORCE | SOR_PLL2_PORT_POWERDOWN |
1584 SOR_PLL2_BANDGAP_POWERDOWN;
1585 tegra_sor_writel(sor, value, SOR_PLL2);
1586
1587 value = tegra_sor_readl(sor, SOR_PLL0);
1588 value |= SOR_PLL0_VCOPD | SOR_PLL0_PWR;
1589 tegra_sor_writel(sor, value, SOR_PLL0);
1590
1591 value = tegra_sor_readl(sor, SOR_DP_PADCTL0);
1592 value &= ~SOR_DP_PADCTL_PAD_CAL_PD;
1593 tegra_sor_writel(sor, value, SOR_DP_PADCTL0);
1594
1595 /* step 2 */
1596 err = tegra_io_rail_power_on(TEGRA_IO_RAIL_LVDS);
1597 if (err < 0)
1598 dev_err(sor->dev, "failed to power on I/O rail: %d\n", err);
1599
1600 usleep_range(5, 100);
1601
1602 /* step 3 */
1603 value = tegra_sor_readl(sor, SOR_PLL2);
1604 value &= ~SOR_PLL2_BANDGAP_POWERDOWN;
1605 tegra_sor_writel(sor, value, SOR_PLL2);
1606
1607 usleep_range(20, 100);
1608
1609 /* step 4 */
1610 value = tegra_sor_readl(sor, SOR_PLL0);
1611 value &= ~SOR_PLL0_VCOPD;
1612 value &= ~SOR_PLL0_PWR;
1613 tegra_sor_writel(sor, value, SOR_PLL0);
1614
1615 value = tegra_sor_readl(sor, SOR_PLL2);
1616 value &= ~SOR_PLL2_SEQ_PLLCAPPD_ENFORCE;
1617 tegra_sor_writel(sor, value, SOR_PLL2);
1618
1619 usleep_range(200, 1000);
1620
1621 /* step 5 */
1622 value = tegra_sor_readl(sor, SOR_PLL2);
1623 value &= ~SOR_PLL2_PORT_POWERDOWN;
1624 tegra_sor_writel(sor, value, SOR_PLL2);
1625
1626 /* XXX not in TRM */
1627 for (value = 0, i = 0; i < 5; i++)
1628 value |= SOR_XBAR_CTRL_LINK0_XSEL(i, sor->soc->xbar_cfg[i]) |
1629 SOR_XBAR_CTRL_LINK1_XSEL(i, i);
1630
1631 tegra_sor_writel(sor, 0x00000000, SOR_XBAR_POL);
1632 tegra_sor_writel(sor, value, SOR_XBAR_CTRL);
1633
1634 /* switch to DP parent clock */
1635 err = tegra_sor_set_parent_clock(sor, sor->clk_dp);
1636 if (err < 0)
1637 dev_err(sor->dev, "failed to set parent clock: %d\n", err);
1638
1639 /* power DP lanes */
1640 value = tegra_sor_readl(sor, SOR_DP_PADCTL0);
1641
1642 if (link.num_lanes <= 2)
1643 value &= ~(SOR_DP_PADCTL_PD_TXD_3 | SOR_DP_PADCTL_PD_TXD_2);
1644 else
1645 value |= SOR_DP_PADCTL_PD_TXD_3 | SOR_DP_PADCTL_PD_TXD_2;
1646
1647 if (link.num_lanes <= 1)
1648 value &= ~SOR_DP_PADCTL_PD_TXD_1;
1649 else
1650 value |= SOR_DP_PADCTL_PD_TXD_1;
1651
1652 if (link.num_lanes == 0)
1653 value &= ~SOR_DP_PADCTL_PD_TXD_0;
1654 else
1655 value |= SOR_DP_PADCTL_PD_TXD_0;
1656
1657 tegra_sor_writel(sor, value, SOR_DP_PADCTL0);
1658
1659 value = tegra_sor_readl(sor, SOR_DP_LINKCTL0);
1660 value &= ~SOR_DP_LINKCTL_LANE_COUNT_MASK;
1661 value |= SOR_DP_LINKCTL_LANE_COUNT(link.num_lanes);
1662 tegra_sor_writel(sor, value, SOR_DP_LINKCTL0);
1663
1664 /* start lane sequencer */
1665 value = SOR_LANE_SEQ_CTL_TRIGGER | SOR_LANE_SEQ_CTL_SEQUENCE_DOWN |
1666 SOR_LANE_SEQ_CTL_POWER_STATE_UP;
1667 tegra_sor_writel(sor, value, SOR_LANE_SEQ_CTL);
1668
1669 while (true) {
1670 value = tegra_sor_readl(sor, SOR_LANE_SEQ_CTL);
1671 if ((value & SOR_LANE_SEQ_CTL_TRIGGER) == 0)
1672 break;
1673
1674 usleep_range(250, 1000);
1675 }
1676
1677 /* set link bandwidth */
1678 value = tegra_sor_readl(sor, SOR_CLK_CNTRL);
1679 value &= ~SOR_CLK_CNTRL_DP_LINK_SPEED_MASK;
1680 value |= drm_dp_link_rate_to_bw_code(link.rate) << 2;
1681 tegra_sor_writel(sor, value, SOR_CLK_CNTRL);
1682
1683 tegra_sor_apply_config(sor, &config);
1684
1685 /* enable link */
1686 value = tegra_sor_readl(sor, SOR_DP_LINKCTL0);
1687 value |= SOR_DP_LINKCTL_ENABLE;
1688 value |= SOR_DP_LINKCTL_ENHANCED_FRAME;
1689 tegra_sor_writel(sor, value, SOR_DP_LINKCTL0);
1690
1691 for (i = 0, value = 0; i < 4; i++) {
1692 unsigned long lane = SOR_DP_TPG_CHANNEL_CODING |
1693 SOR_DP_TPG_SCRAMBLER_GALIOS |
1694 SOR_DP_TPG_PATTERN_NONE;
1695 value = (value << 8) | lane;
1696 }
1697
1698 tegra_sor_writel(sor, value, SOR_DP_TPG);
1699
1700 /* enable pad calibration logic */
1701 value = tegra_sor_readl(sor, SOR_DP_PADCTL0);
1702 value |= SOR_DP_PADCTL_PAD_CAL_PD;
1703 tegra_sor_writel(sor, value, SOR_DP_PADCTL0);
1704
1705 err = drm_dp_link_probe(sor->aux, &link);
1706 if (err < 0)
1707 dev_err(sor->dev, "failed to probe eDP link: %d\n", err);
1708
1709 err = drm_dp_link_power_up(sor->aux, &link);
1710 if (err < 0)
1711 dev_err(sor->dev, "failed to power up eDP link: %d\n", err);
1712
1713 err = drm_dp_link_configure(sor->aux, &link);
1714 if (err < 0)
1715 dev_err(sor->dev, "failed to configure eDP link: %d\n", err);
1716
1717 rate = drm_dp_link_rate_to_bw_code(link.rate);
1718 lanes = link.num_lanes;
1719
1720 value = tegra_sor_readl(sor, SOR_CLK_CNTRL);
1721 value &= ~SOR_CLK_CNTRL_DP_LINK_SPEED_MASK;
1722 value |= SOR_CLK_CNTRL_DP_LINK_SPEED(rate);
1723 tegra_sor_writel(sor, value, SOR_CLK_CNTRL);
1724
1725 value = tegra_sor_readl(sor, SOR_DP_LINKCTL0);
1726 value &= ~SOR_DP_LINKCTL_LANE_COUNT_MASK;
1727 value |= SOR_DP_LINKCTL_LANE_COUNT(lanes);
1728
1729 if (link.capabilities & DP_LINK_CAP_ENHANCED_FRAMING)
1730 value |= SOR_DP_LINKCTL_ENHANCED_FRAME;
1731
1732 tegra_sor_writel(sor, value, SOR_DP_LINKCTL0);
1733
1734 /* disable training pattern generator */
1735
1736 for (i = 0; i < link.num_lanes; i++) {
1737 unsigned long lane = SOR_DP_TPG_CHANNEL_CODING |
1738 SOR_DP_TPG_SCRAMBLER_GALIOS |
1739 SOR_DP_TPG_PATTERN_NONE;
1740 value = (value << 8) | lane;
1741 }
1742
1743 tegra_sor_writel(sor, value, SOR_DP_TPG);
1744
1745 err = tegra_sor_dp_train_fast(sor, &link);
1746 if (err < 0)
1747 dev_err(sor->dev, "DP fast link training failed: %d\n", err);
1748
1749 dev_dbg(sor->dev, "fast link training succeeded\n");
1750
1751 err = tegra_sor_power_up(sor, 250);
1752 if (err < 0)
1753 dev_err(sor->dev, "failed to power up SOR: %d\n", err);
1754
1755 /* CSTM (LVDS, link A/B, upper) */
1756 value = SOR_CSTM_LVDS | SOR_CSTM_LINK_ACT_A | SOR_CSTM_LINK_ACT_B |
1757 SOR_CSTM_UPPER;
1758 tegra_sor_writel(sor, value, SOR_CSTM);
1759
1760 /* use DP-A protocol */
1761 value = tegra_sor_readl(sor, SOR_STATE1);
1762 value &= ~SOR_STATE_ASY_PROTOCOL_MASK;
1763 value |= SOR_STATE_ASY_PROTOCOL_DP_A;
1764 tegra_sor_writel(sor, value, SOR_STATE1);
1765
1766 tegra_sor_mode_set(sor, mode, state);
1767
1768 /* PWM setup */
1769 err = tegra_sor_setup_pwm(sor, 250);
1770 if (err < 0)
1771 dev_err(sor->dev, "failed to setup PWM: %d\n", err);
1772
1773 tegra_sor_update(sor);
1774
1775 value = tegra_dc_readl(dc, DC_DISP_DISP_WIN_OPTIONS);
1776 value |= SOR_ENABLE;
1777 tegra_dc_writel(dc, value, DC_DISP_DISP_WIN_OPTIONS);
1778
1779 tegra_dc_commit(dc);
1780
1781 err = tegra_sor_attach(sor);
1782 if (err < 0)
1783 dev_err(sor->dev, "failed to attach SOR: %d\n", err);
1784
1785 err = tegra_sor_wakeup(sor);
1786 if (err < 0)
1787 dev_err(sor->dev, "failed to enable DC: %d\n", err);
1788
1789 if (output->panel)
1790 drm_panel_enable(output->panel);
1791 }
1792
1793 static int
1794 tegra_sor_encoder_atomic_check(struct drm_encoder *encoder,
1795 struct drm_crtc_state *crtc_state,
1796 struct drm_connector_state *conn_state)
1797 {
1798 struct tegra_output *output = encoder_to_output(encoder);
1799 struct tegra_sor_state *state = to_sor_state(conn_state);
1800 struct tegra_dc *dc = to_tegra_dc(conn_state->crtc);
1801 unsigned long pclk = crtc_state->mode.clock * 1000;
1802 struct tegra_sor *sor = to_sor(output);
1803 struct drm_display_info *info;
1804 int err;
1805
1806 info = &output->connector.display_info;
1807
1808 err = tegra_dc_state_setup_clock(dc, crtc_state, sor->clk_parent,
1809 pclk, 0);
1810 if (err < 0) {
1811 dev_err(output->dev, "failed to setup CRTC state: %d\n", err);
1812 return err;
1813 }
1814
1815 switch (info->bpc) {
1816 case 8:
1817 case 6:
1818 state->bpc = info->bpc;
1819 break;
1820
1821 default:
1822 DRM_DEBUG_KMS("%u bits-per-color not supported\n", info->bpc);
1823 state->bpc = 8;
1824 break;
1825 }
1826
1827 return 0;
1828 }
1829
1830 static const struct drm_encoder_helper_funcs tegra_sor_edp_helpers = {
1831 .disable = tegra_sor_edp_disable,
1832 .enable = tegra_sor_edp_enable,
1833 .atomic_check = tegra_sor_encoder_atomic_check,
1834 };
1835
1836 static inline u32 tegra_sor_hdmi_subpack(const u8 *ptr, size_t size)
1837 {
1838 u32 value = 0;
1839 size_t i;
1840
1841 for (i = size; i > 0; i--)
1842 value = (value << 8) | ptr[i - 1];
1843
1844 return value;
1845 }
1846
1847 static void tegra_sor_hdmi_write_infopack(struct tegra_sor *sor,
1848 const void *data, size_t size)
1849 {
1850 const u8 *ptr = data;
1851 unsigned long offset;
1852 size_t i, j;
1853 u32 value;
1854
1855 switch (ptr[0]) {
1856 case HDMI_INFOFRAME_TYPE_AVI:
1857 offset = SOR_HDMI_AVI_INFOFRAME_HEADER;
1858 break;
1859
1860 case HDMI_INFOFRAME_TYPE_AUDIO:
1861 offset = SOR_HDMI_AUDIO_INFOFRAME_HEADER;
1862 break;
1863
1864 case HDMI_INFOFRAME_TYPE_VENDOR:
1865 offset = SOR_HDMI_VSI_INFOFRAME_HEADER;
1866 break;
1867
1868 default:
1869 dev_err(sor->dev, "unsupported infoframe type: %02x\n",
1870 ptr[0]);
1871 return;
1872 }
1873
1874 value = INFOFRAME_HEADER_TYPE(ptr[0]) |
1875 INFOFRAME_HEADER_VERSION(ptr[1]) |
1876 INFOFRAME_HEADER_LEN(ptr[2]);
1877 tegra_sor_writel(sor, value, offset);
1878 offset++;
1879
1880 /*
1881 * Each subpack contains 7 bytes, divided into:
1882 * - subpack_low: bytes 0 - 3
1883 * - subpack_high: bytes 4 - 6 (with byte 7 padded to 0x00)
1884 */
1885 for (i = 3, j = 0; i < size; i += 7, j += 8) {
1886 size_t rem = size - i, num = min_t(size_t, rem, 4);
1887
1888 value = tegra_sor_hdmi_subpack(&ptr[i], num);
1889 tegra_sor_writel(sor, value, offset++);
1890
1891 num = min_t(size_t, rem - num, 3);
1892
1893 value = tegra_sor_hdmi_subpack(&ptr[i + 4], num);
1894 tegra_sor_writel(sor, value, offset++);
1895 }
1896 }
1897
1898 static int
1899 tegra_sor_hdmi_setup_avi_infoframe(struct tegra_sor *sor,
1900 const struct drm_display_mode *mode)
1901 {
1902 u8 buffer[HDMI_INFOFRAME_SIZE(AVI)];
1903 struct hdmi_avi_infoframe frame;
1904 u32 value;
1905 int err;
1906
1907 /* disable AVI infoframe */
1908 value = tegra_sor_readl(sor, SOR_HDMI_AVI_INFOFRAME_CTRL);
1909 value &= ~INFOFRAME_CTRL_SINGLE;
1910 value &= ~INFOFRAME_CTRL_OTHER;
1911 value &= ~INFOFRAME_CTRL_ENABLE;
1912 tegra_sor_writel(sor, value, SOR_HDMI_AVI_INFOFRAME_CTRL);
1913
1914 err = drm_hdmi_avi_infoframe_from_display_mode(&frame, mode, false);
1915 if (err < 0) {
1916 dev_err(sor->dev, "failed to setup AVI infoframe: %d\n", err);
1917 return err;
1918 }
1919
1920 err = hdmi_avi_infoframe_pack(&frame, buffer, sizeof(buffer));
1921 if (err < 0) {
1922 dev_err(sor->dev, "failed to pack AVI infoframe: %d\n", err);
1923 return err;
1924 }
1925
1926 tegra_sor_hdmi_write_infopack(sor, buffer, err);
1927
1928 /* enable AVI infoframe */
1929 value = tegra_sor_readl(sor, SOR_HDMI_AVI_INFOFRAME_CTRL);
1930 value |= INFOFRAME_CTRL_CHECKSUM_ENABLE;
1931 value |= INFOFRAME_CTRL_ENABLE;
1932 tegra_sor_writel(sor, value, SOR_HDMI_AVI_INFOFRAME_CTRL);
1933
1934 return 0;
1935 }
1936
1937 static void tegra_sor_hdmi_disable_audio_infoframe(struct tegra_sor *sor)
1938 {
1939 u32 value;
1940
1941 value = tegra_sor_readl(sor, SOR_HDMI_AUDIO_INFOFRAME_CTRL);
1942 value &= ~INFOFRAME_CTRL_ENABLE;
1943 tegra_sor_writel(sor, value, SOR_HDMI_AUDIO_INFOFRAME_CTRL);
1944 }
1945
1946 static struct tegra_sor_hdmi_settings *
1947 tegra_sor_hdmi_find_settings(struct tegra_sor *sor, unsigned long frequency)
1948 {
1949 unsigned int i;
1950
1951 for (i = 0; i < sor->num_settings; i++)
1952 if (frequency <= sor->settings[i].frequency)
1953 return &sor->settings[i];
1954
1955 return NULL;
1956 }
1957
1958 static void tegra_sor_hdmi_disable(struct drm_encoder *encoder)
1959 {
1960 struct tegra_output *output = encoder_to_output(encoder);
1961 struct tegra_dc *dc = to_tegra_dc(encoder->crtc);
1962 struct tegra_sor *sor = to_sor(output);
1963 u32 value;
1964 int err;
1965
1966 err = tegra_sor_detach(sor);
1967 if (err < 0)
1968 dev_err(sor->dev, "failed to detach SOR: %d\n", err);
1969
1970 tegra_sor_writel(sor, 0, SOR_STATE1);
1971 tegra_sor_update(sor);
1972
1973 /* disable display to SOR clock */
1974 value = tegra_dc_readl(dc, DC_DISP_DISP_WIN_OPTIONS);
1975 value &= ~SOR1_TIMING_CYA;
1976 value &= ~SOR1_ENABLE;
1977 tegra_dc_writel(dc, value, DC_DISP_DISP_WIN_OPTIONS);
1978
1979 tegra_dc_commit(dc);
1980
1981 err = tegra_sor_power_down(sor);
1982 if (err < 0)
1983 dev_err(sor->dev, "failed to power down SOR: %d\n", err);
1984
1985 err = tegra_io_rail_power_off(TEGRA_IO_RAIL_HDMI);
1986 if (err < 0)
1987 dev_err(sor->dev, "failed to power off HDMI rail: %d\n", err);
1988
1989 pm_runtime_put(sor->dev);
1990 }
1991
1992 static void tegra_sor_hdmi_enable(struct drm_encoder *encoder)
1993 {
1994 struct tegra_output *output = encoder_to_output(encoder);
1995 unsigned int h_ref_to_sync = 1, pulse_start, max_ac;
1996 struct tegra_dc *dc = to_tegra_dc(encoder->crtc);
1997 struct tegra_sor_hdmi_settings *settings;
1998 struct tegra_sor *sor = to_sor(output);
1999 struct tegra_sor_state *state;
2000 struct drm_display_mode *mode;
2001 unsigned int div, i;
2002 u32 value;
2003 int err;
2004
2005 state = to_sor_state(output->connector.state);
2006 mode = &encoder->crtc->state->adjusted_mode;
2007
2008 pm_runtime_get_sync(sor->dev);
2009
2010 /* switch to safe parent clock */
2011 err = tegra_sor_set_parent_clock(sor, sor->clk_safe);
2012 if (err < 0) {
2013 dev_err(sor->dev, "failed to set safe parent clock: %d\n", err);
2014 return;
2015 }
2016
2017 div = clk_get_rate(sor->clk) / 1000000 * 4;
2018
2019 err = tegra_io_rail_power_on(TEGRA_IO_RAIL_HDMI);
2020 if (err < 0)
2021 dev_err(sor->dev, "failed to power on HDMI rail: %d\n", err);
2022
2023 usleep_range(20, 100);
2024
2025 value = tegra_sor_readl(sor, SOR_PLL2);
2026 value &= ~SOR_PLL2_BANDGAP_POWERDOWN;
2027 tegra_sor_writel(sor, value, SOR_PLL2);
2028
2029 usleep_range(20, 100);
2030
2031 value = tegra_sor_readl(sor, SOR_PLL3);
2032 value &= ~SOR_PLL3_PLL_VDD_MODE_3V3;
2033 tegra_sor_writel(sor, value, SOR_PLL3);
2034
2035 value = tegra_sor_readl(sor, SOR_PLL0);
2036 value &= ~SOR_PLL0_VCOPD;
2037 value &= ~SOR_PLL0_PWR;
2038 tegra_sor_writel(sor, value, SOR_PLL0);
2039
2040 value = tegra_sor_readl(sor, SOR_PLL2);
2041 value &= ~SOR_PLL2_SEQ_PLLCAPPD_ENFORCE;
2042 tegra_sor_writel(sor, value, SOR_PLL2);
2043
2044 usleep_range(200, 400);
2045
2046 value = tegra_sor_readl(sor, SOR_PLL2);
2047 value &= ~SOR_PLL2_POWERDOWN_OVERRIDE;
2048 value &= ~SOR_PLL2_PORT_POWERDOWN;
2049 tegra_sor_writel(sor, value, SOR_PLL2);
2050
2051 usleep_range(20, 100);
2052
2053 value = tegra_sor_readl(sor, SOR_DP_PADCTL0);
2054 value |= SOR_DP_PADCTL_PD_TXD_3 | SOR_DP_PADCTL_PD_TXD_0 |
2055 SOR_DP_PADCTL_PD_TXD_1 | SOR_DP_PADCTL_PD_TXD_2;
2056 tegra_sor_writel(sor, value, SOR_DP_PADCTL0);
2057
2058 while (true) {
2059 value = tegra_sor_readl(sor, SOR_LANE_SEQ_CTL);
2060 if ((value & SOR_LANE_SEQ_CTL_STATE_BUSY) == 0)
2061 break;
2062
2063 usleep_range(250, 1000);
2064 }
2065
2066 value = SOR_LANE_SEQ_CTL_TRIGGER | SOR_LANE_SEQ_CTL_SEQUENCE_DOWN |
2067 SOR_LANE_SEQ_CTL_POWER_STATE_UP | SOR_LANE_SEQ_CTL_DELAY(5);
2068 tegra_sor_writel(sor, value, SOR_LANE_SEQ_CTL);
2069
2070 while (true) {
2071 value = tegra_sor_readl(sor, SOR_LANE_SEQ_CTL);
2072 if ((value & SOR_LANE_SEQ_CTL_TRIGGER) == 0)
2073 break;
2074
2075 usleep_range(250, 1000);
2076 }
2077
2078 value = tegra_sor_readl(sor, SOR_CLK_CNTRL);
2079 value &= ~SOR_CLK_CNTRL_DP_LINK_SPEED_MASK;
2080 value &= ~SOR_CLK_CNTRL_DP_CLK_SEL_MASK;
2081
2082 if (mode->clock < 340000)
2083 value |= SOR_CLK_CNTRL_DP_LINK_SPEED_G2_70;
2084 else
2085 value |= SOR_CLK_CNTRL_DP_LINK_SPEED_G5_40;
2086
2087 value |= SOR_CLK_CNTRL_DP_CLK_SEL_SINGLE_PCLK;
2088 tegra_sor_writel(sor, value, SOR_CLK_CNTRL);
2089
2090 value = tegra_sor_readl(sor, SOR_DP_SPARE0);
2091 value |= SOR_DP_SPARE_DISP_VIDEO_PREAMBLE;
2092 value &= ~SOR_DP_SPARE_PANEL_INTERNAL;
2093 value |= SOR_DP_SPARE_SEQ_ENABLE;
2094 tegra_sor_writel(sor, value, SOR_DP_SPARE0);
2095
2096 value = SOR_SEQ_CTL_PU_PC(0) | SOR_SEQ_CTL_PU_PC_ALT(0) |
2097 SOR_SEQ_CTL_PD_PC(8) | SOR_SEQ_CTL_PD_PC_ALT(8);
2098 tegra_sor_writel(sor, value, SOR_SEQ_CTL);
2099
2100 value = SOR_SEQ_INST_DRIVE_PWM_OUT_LO | SOR_SEQ_INST_HALT |
2101 SOR_SEQ_INST_WAIT_VSYNC | SOR_SEQ_INST_WAIT(1);
2102 tegra_sor_writel(sor, value, SOR_SEQ_INST(0));
2103 tegra_sor_writel(sor, value, SOR_SEQ_INST(8));
2104
2105 /* program the reference clock */
2106 value = SOR_REFCLK_DIV_INT(div) | SOR_REFCLK_DIV_FRAC(div);
2107 tegra_sor_writel(sor, value, SOR_REFCLK);
2108
2109 /* XXX not in TRM */
2110 for (value = 0, i = 0; i < 5; i++)
2111 value |= SOR_XBAR_CTRL_LINK0_XSEL(i, sor->soc->xbar_cfg[i]) |
2112 SOR_XBAR_CTRL_LINK1_XSEL(i, i);
2113
2114 tegra_sor_writel(sor, 0x00000000, SOR_XBAR_POL);
2115 tegra_sor_writel(sor, value, SOR_XBAR_CTRL);
2116
2117 /* switch to parent clock */
2118 err = clk_set_parent(sor->clk, sor->clk_parent);
2119 if (err < 0) {
2120 dev_err(sor->dev, "failed to set parent clock: %d\n", err);
2121 return;
2122 }
2123
2124 err = tegra_sor_set_parent_clock(sor, sor->clk_pad);
2125 if (err < 0) {
2126 dev_err(sor->dev, "failed to set pad clock: %d\n", err);
2127 return;
2128 }
2129
2130 value = SOR_INPUT_CONTROL_HDMI_SRC_SELECT(dc->pipe);
2131
2132 /* XXX is this the proper check? */
2133 if (mode->clock < 75000)
2134 value |= SOR_INPUT_CONTROL_ARM_VIDEO_RANGE_LIMITED;
2135
2136 tegra_sor_writel(sor, value, SOR_INPUT_CONTROL);
2137
2138 max_ac = ((mode->htotal - mode->hdisplay) - SOR_REKEY - 18) / 32;
2139
2140 value = SOR_HDMI_CTRL_ENABLE | SOR_HDMI_CTRL_MAX_AC_PACKET(max_ac) |
2141 SOR_HDMI_CTRL_AUDIO_LAYOUT | SOR_HDMI_CTRL_REKEY(SOR_REKEY);
2142 tegra_sor_writel(sor, value, SOR_HDMI_CTRL);
2143
2144 /* H_PULSE2 setup */
2145 pulse_start = h_ref_to_sync + (mode->hsync_end - mode->hsync_start) +
2146 (mode->htotal - mode->hsync_end) - 10;
2147
2148 value = PULSE_LAST_END_A | PULSE_QUAL_VACTIVE |
2149 PULSE_POLARITY_HIGH | PULSE_MODE_NORMAL;
2150 tegra_dc_writel(dc, value, DC_DISP_H_PULSE2_CONTROL);
2151
2152 value = PULSE_END(pulse_start + 8) | PULSE_START(pulse_start);
2153 tegra_dc_writel(dc, value, DC_DISP_H_PULSE2_POSITION_A);
2154
2155 value = tegra_dc_readl(dc, DC_DISP_DISP_SIGNAL_OPTIONS0);
2156 value |= H_PULSE2_ENABLE;
2157 tegra_dc_writel(dc, value, DC_DISP_DISP_SIGNAL_OPTIONS0);
2158
2159 /* infoframe setup */
2160 err = tegra_sor_hdmi_setup_avi_infoframe(sor, mode);
2161 if (err < 0)
2162 dev_err(sor->dev, "failed to setup AVI infoframe: %d\n", err);
2163
2164 /* XXX HDMI audio support not implemented yet */
2165 tegra_sor_hdmi_disable_audio_infoframe(sor);
2166
2167 /* use single TMDS protocol */
2168 value = tegra_sor_readl(sor, SOR_STATE1);
2169 value &= ~SOR_STATE_ASY_PROTOCOL_MASK;
2170 value |= SOR_STATE_ASY_PROTOCOL_SINGLE_TMDS_A;
2171 tegra_sor_writel(sor, value, SOR_STATE1);
2172
2173 /* power up pad calibration */
2174 value = tegra_sor_readl(sor, SOR_DP_PADCTL0);
2175 value &= ~SOR_DP_PADCTL_PAD_CAL_PD;
2176 tegra_sor_writel(sor, value, SOR_DP_PADCTL0);
2177
2178 /* production settings */
2179 settings = tegra_sor_hdmi_find_settings(sor, mode->clock * 1000);
2180 if (!settings) {
2181 dev_err(sor->dev, "no settings for pixel clock %d Hz\n",
2182 mode->clock * 1000);
2183 return;
2184 }
2185
2186 value = tegra_sor_readl(sor, SOR_PLL0);
2187 value &= ~SOR_PLL0_ICHPMP_MASK;
2188 value &= ~SOR_PLL0_VCOCAP_MASK;
2189 value |= SOR_PLL0_ICHPMP(settings->ichpmp);
2190 value |= SOR_PLL0_VCOCAP(settings->vcocap);
2191 tegra_sor_writel(sor, value, SOR_PLL0);
2192
2193 tegra_sor_dp_term_calibrate(sor);
2194
2195 value = tegra_sor_readl(sor, SOR_PLL1);
2196 value &= ~SOR_PLL1_LOADADJ_MASK;
2197 value |= SOR_PLL1_LOADADJ(settings->loadadj);
2198 tegra_sor_writel(sor, value, SOR_PLL1);
2199
2200 value = tegra_sor_readl(sor, SOR_PLL3);
2201 value &= ~SOR_PLL3_BG_VREF_LEVEL_MASK;
2202 value |= SOR_PLL3_BG_VREF_LEVEL(settings->bg_vref);
2203 tegra_sor_writel(sor, value, SOR_PLL3);
2204
2205 value = settings->drive_current[0] << 24 |
2206 settings->drive_current[1] << 16 |
2207 settings->drive_current[2] << 8 |
2208 settings->drive_current[3] << 0;
2209 tegra_sor_writel(sor, value, SOR_LANE_DRIVE_CURRENT0);
2210
2211 value = settings->preemphasis[0] << 24 |
2212 settings->preemphasis[1] << 16 |
2213 settings->preemphasis[2] << 8 |
2214 settings->preemphasis[3] << 0;
2215 tegra_sor_writel(sor, value, SOR_LANE_PREEMPHASIS0);
2216
2217 value = tegra_sor_readl(sor, SOR_DP_PADCTL0);
2218 value &= ~SOR_DP_PADCTL_TX_PU_MASK;
2219 value |= SOR_DP_PADCTL_TX_PU_ENABLE;
2220 value |= SOR_DP_PADCTL_TX_PU(settings->tx_pu);
2221 tegra_sor_writel(sor, value, SOR_DP_PADCTL0);
2222
2223 /* power down pad calibration */
2224 value = tegra_sor_readl(sor, SOR_DP_PADCTL0);
2225 value |= SOR_DP_PADCTL_PAD_CAL_PD;
2226 tegra_sor_writel(sor, value, SOR_DP_PADCTL0);
2227
2228 /* miscellaneous display controller settings */
2229 value = VSYNC_H_POSITION(1);
2230 tegra_dc_writel(dc, value, DC_DISP_DISP_TIMING_OPTIONS);
2231
2232 value = tegra_dc_readl(dc, DC_DISP_DISP_COLOR_CONTROL);
2233 value &= ~DITHER_CONTROL_MASK;
2234 value &= ~BASE_COLOR_SIZE_MASK;
2235
2236 switch (state->bpc) {
2237 case 6:
2238 value |= BASE_COLOR_SIZE_666;
2239 break;
2240
2241 case 8:
2242 value |= BASE_COLOR_SIZE_888;
2243 break;
2244
2245 default:
2246 WARN(1, "%u bits-per-color not supported\n", state->bpc);
2247 value |= BASE_COLOR_SIZE_888;
2248 break;
2249 }
2250
2251 tegra_dc_writel(dc, value, DC_DISP_DISP_COLOR_CONTROL);
2252
2253 err = tegra_sor_power_up(sor, 250);
2254 if (err < 0)
2255 dev_err(sor->dev, "failed to power up SOR: %d\n", err);
2256
2257 /* configure dynamic range of output */
2258 value = tegra_sor_readl(sor, SOR_HEAD_STATE0(dc->pipe));
2259 value &= ~SOR_HEAD_STATE_RANGECOMPRESS_MASK;
2260 value &= ~SOR_HEAD_STATE_DYNRANGE_MASK;
2261 tegra_sor_writel(sor, value, SOR_HEAD_STATE0(dc->pipe));
2262
2263 /* configure colorspace */
2264 value = tegra_sor_readl(sor, SOR_HEAD_STATE0(dc->pipe));
2265 value &= ~SOR_HEAD_STATE_COLORSPACE_MASK;
2266 value |= SOR_HEAD_STATE_COLORSPACE_RGB;
2267 tegra_sor_writel(sor, value, SOR_HEAD_STATE0(dc->pipe));
2268
2269 tegra_sor_mode_set(sor, mode, state);
2270
2271 tegra_sor_update(sor);
2272
2273 err = tegra_sor_attach(sor);
2274 if (err < 0)
2275 dev_err(sor->dev, "failed to attach SOR: %d\n", err);
2276
2277 /* enable display to SOR clock and generate HDMI preamble */
2278 value = tegra_dc_readl(dc, DC_DISP_DISP_WIN_OPTIONS);
2279 value |= SOR1_ENABLE | SOR1_TIMING_CYA;
2280 tegra_dc_writel(dc, value, DC_DISP_DISP_WIN_OPTIONS);
2281
2282 tegra_dc_commit(dc);
2283
2284 err = tegra_sor_wakeup(sor);
2285 if (err < 0)
2286 dev_err(sor->dev, "failed to wakeup SOR: %d\n", err);
2287 }
2288
2289 static const struct drm_encoder_helper_funcs tegra_sor_hdmi_helpers = {
2290 .disable = tegra_sor_hdmi_disable,
2291 .enable = tegra_sor_hdmi_enable,
2292 .atomic_check = tegra_sor_encoder_atomic_check,
2293 };
2294
2295 static int tegra_sor_init(struct host1x_client *client)
2296 {
2297 struct drm_device *drm = dev_get_drvdata(client->parent);
2298 const struct drm_encoder_helper_funcs *helpers = NULL;
2299 struct tegra_sor *sor = host1x_client_to_sor(client);
2300 int connector = DRM_MODE_CONNECTOR_Unknown;
2301 int encoder = DRM_MODE_ENCODER_NONE;
2302 int err;
2303
2304 if (!sor->aux) {
2305 if (sor->soc->supports_hdmi) {
2306 connector = DRM_MODE_CONNECTOR_HDMIA;
2307 encoder = DRM_MODE_ENCODER_TMDS;
2308 helpers = &tegra_sor_hdmi_helpers;
2309 } else if (sor->soc->supports_lvds) {
2310 connector = DRM_MODE_CONNECTOR_LVDS;
2311 encoder = DRM_MODE_ENCODER_LVDS;
2312 }
2313 } else {
2314 if (sor->soc->supports_edp) {
2315 connector = DRM_MODE_CONNECTOR_eDP;
2316 encoder = DRM_MODE_ENCODER_TMDS;
2317 helpers = &tegra_sor_edp_helpers;
2318 } else if (sor->soc->supports_dp) {
2319 connector = DRM_MODE_CONNECTOR_DisplayPort;
2320 encoder = DRM_MODE_ENCODER_TMDS;
2321 }
2322 }
2323
2324 sor->output.dev = sor->dev;
2325
2326 drm_connector_init(drm, &sor->output.connector,
2327 &tegra_sor_connector_funcs,
2328 connector);
2329 drm_connector_helper_add(&sor->output.connector,
2330 &tegra_sor_connector_helper_funcs);
2331 sor->output.connector.dpms = DRM_MODE_DPMS_OFF;
2332
2333 drm_encoder_init(drm, &sor->output.encoder, &tegra_sor_encoder_funcs,
2334 encoder, NULL);
2335 drm_encoder_helper_add(&sor->output.encoder, helpers);
2336
2337 drm_mode_connector_attach_encoder(&sor->output.connector,
2338 &sor->output.encoder);
2339 drm_connector_register(&sor->output.connector);
2340
2341 err = tegra_output_init(drm, &sor->output);
2342 if (err < 0) {
2343 dev_err(client->dev, "failed to initialize output: %d\n", err);
2344 return err;
2345 }
2346
2347 sor->output.encoder.possible_crtcs = 0x3;
2348
2349 if (IS_ENABLED(CONFIG_DEBUG_FS)) {
2350 err = tegra_sor_debugfs_init(sor, drm->primary);
2351 if (err < 0)
2352 dev_err(sor->dev, "debugfs setup failed: %d\n", err);
2353 }
2354
2355 if (sor->aux) {
2356 err = drm_dp_aux_attach(sor->aux, &sor->output);
2357 if (err < 0) {
2358 dev_err(sor->dev, "failed to attach DP: %d\n", err);
2359 return err;
2360 }
2361 }
2362
2363 /*
2364 * XXX: Remove this reset once proper hand-over from firmware to
2365 * kernel is possible.
2366 */
2367 if (sor->rst) {
2368 err = reset_control_assert(sor->rst);
2369 if (err < 0) {
2370 dev_err(sor->dev, "failed to assert SOR reset: %d\n",
2371 err);
2372 return err;
2373 }
2374 }
2375
2376 err = clk_prepare_enable(sor->clk);
2377 if (err < 0) {
2378 dev_err(sor->dev, "failed to enable clock: %d\n", err);
2379 return err;
2380 }
2381
2382 usleep_range(1000, 3000);
2383
2384 if (sor->rst) {
2385 err = reset_control_deassert(sor->rst);
2386 if (err < 0) {
2387 dev_err(sor->dev, "failed to deassert SOR reset: %d\n",
2388 err);
2389 return err;
2390 }
2391 }
2392
2393 err = clk_prepare_enable(sor->clk_safe);
2394 if (err < 0)
2395 return err;
2396
2397 err = clk_prepare_enable(sor->clk_dp);
2398 if (err < 0)
2399 return err;
2400
2401 return 0;
2402 }
2403
2404 static int tegra_sor_exit(struct host1x_client *client)
2405 {
2406 struct tegra_sor *sor = host1x_client_to_sor(client);
2407 int err;
2408
2409 tegra_output_exit(&sor->output);
2410
2411 if (sor->aux) {
2412 err = drm_dp_aux_detach(sor->aux);
2413 if (err < 0) {
2414 dev_err(sor->dev, "failed to detach DP: %d\n", err);
2415 return err;
2416 }
2417 }
2418
2419 clk_disable_unprepare(sor->clk_safe);
2420 clk_disable_unprepare(sor->clk_dp);
2421 clk_disable_unprepare(sor->clk);
2422
2423 if (IS_ENABLED(CONFIG_DEBUG_FS))
2424 tegra_sor_debugfs_exit(sor);
2425
2426 return 0;
2427 }
2428
2429 static const struct host1x_client_ops sor_client_ops = {
2430 .init = tegra_sor_init,
2431 .exit = tegra_sor_exit,
2432 };
2433
2434 static const struct tegra_sor_ops tegra_sor_edp_ops = {
2435 .name = "eDP",
2436 };
2437
2438 static int tegra_sor_hdmi_probe(struct tegra_sor *sor)
2439 {
2440 int err;
2441
2442 sor->avdd_io_supply = devm_regulator_get(sor->dev, "avdd-io");
2443 if (IS_ERR(sor->avdd_io_supply)) {
2444 dev_err(sor->dev, "cannot get AVDD I/O supply: %ld\n",
2445 PTR_ERR(sor->avdd_io_supply));
2446 return PTR_ERR(sor->avdd_io_supply);
2447 }
2448
2449 err = regulator_enable(sor->avdd_io_supply);
2450 if (err < 0) {
2451 dev_err(sor->dev, "failed to enable AVDD I/O supply: %d\n",
2452 err);
2453 return err;
2454 }
2455
2456 sor->vdd_pll_supply = devm_regulator_get(sor->dev, "vdd-pll");
2457 if (IS_ERR(sor->vdd_pll_supply)) {
2458 dev_err(sor->dev, "cannot get VDD PLL supply: %ld\n",
2459 PTR_ERR(sor->vdd_pll_supply));
2460 return PTR_ERR(sor->vdd_pll_supply);
2461 }
2462
2463 err = regulator_enable(sor->vdd_pll_supply);
2464 if (err < 0) {
2465 dev_err(sor->dev, "failed to enable VDD PLL supply: %d\n",
2466 err);
2467 return err;
2468 }
2469
2470 sor->hdmi_supply = devm_regulator_get(sor->dev, "hdmi");
2471 if (IS_ERR(sor->hdmi_supply)) {
2472 dev_err(sor->dev, "cannot get HDMI supply: %ld\n",
2473 PTR_ERR(sor->hdmi_supply));
2474 return PTR_ERR(sor->hdmi_supply);
2475 }
2476
2477 err = regulator_enable(sor->hdmi_supply);
2478 if (err < 0) {
2479 dev_err(sor->dev, "failed to enable HDMI supply: %d\n", err);
2480 return err;
2481 }
2482
2483 return 0;
2484 }
2485
2486 static int tegra_sor_hdmi_remove(struct tegra_sor *sor)
2487 {
2488 regulator_disable(sor->hdmi_supply);
2489 regulator_disable(sor->vdd_pll_supply);
2490 regulator_disable(sor->avdd_io_supply);
2491
2492 return 0;
2493 }
2494
2495 static const struct tegra_sor_ops tegra_sor_hdmi_ops = {
2496 .name = "HDMI",
2497 .probe = tegra_sor_hdmi_probe,
2498 .remove = tegra_sor_hdmi_remove,
2499 };
2500
2501 static const u8 tegra124_sor_xbar_cfg[5] = {
2502 0, 1, 2, 3, 4
2503 };
2504
2505 static const struct tegra_sor_soc tegra124_sor = {
2506 .supports_edp = true,
2507 .supports_lvds = true,
2508 .supports_hdmi = false,
2509 .supports_dp = false,
2510 .xbar_cfg = tegra124_sor_xbar_cfg,
2511 };
2512
2513 static const struct tegra_sor_soc tegra210_sor = {
2514 .supports_edp = true,
2515 .supports_lvds = false,
2516 .supports_hdmi = false,
2517 .supports_dp = false,
2518 .xbar_cfg = tegra124_sor_xbar_cfg,
2519 };
2520
2521 static const u8 tegra210_sor_xbar_cfg[5] = {
2522 2, 1, 0, 3, 4
2523 };
2524
2525 static const struct tegra_sor_soc tegra210_sor1 = {
2526 .supports_edp = false,
2527 .supports_lvds = false,
2528 .supports_hdmi = true,
2529 .supports_dp = true,
2530
2531 .num_settings = ARRAY_SIZE(tegra210_sor_hdmi_defaults),
2532 .settings = tegra210_sor_hdmi_defaults,
2533
2534 .xbar_cfg = tegra210_sor_xbar_cfg,
2535 };
2536
2537 static const struct of_device_id tegra_sor_of_match[] = {
2538 { .compatible = "nvidia,tegra210-sor1", .data = &tegra210_sor1 },
2539 { .compatible = "nvidia,tegra210-sor", .data = &tegra210_sor },
2540 { .compatible = "nvidia,tegra124-sor", .data = &tegra124_sor },
2541 { },
2542 };
2543 MODULE_DEVICE_TABLE(of, tegra_sor_of_match);
2544
2545 static int tegra_sor_probe(struct platform_device *pdev)
2546 {
2547 struct device_node *np;
2548 struct tegra_sor *sor;
2549 struct resource *regs;
2550 int err;
2551
2552 sor = devm_kzalloc(&pdev->dev, sizeof(*sor), GFP_KERNEL);
2553 if (!sor)
2554 return -ENOMEM;
2555
2556 sor->soc = of_device_get_match_data(&pdev->dev);
2557 sor->output.dev = sor->dev = &pdev->dev;
2558
2559 sor->settings = devm_kmemdup(&pdev->dev, sor->soc->settings,
2560 sor->soc->num_settings *
2561 sizeof(*sor->settings),
2562 GFP_KERNEL);
2563 if (!sor->settings)
2564 return -ENOMEM;
2565
2566 sor->num_settings = sor->soc->num_settings;
2567
2568 np = of_parse_phandle(pdev->dev.of_node, "nvidia,dpaux", 0);
2569 if (np) {
2570 sor->aux = drm_dp_aux_find_by_of_node(np);
2571 of_node_put(np);
2572
2573 if (!sor->aux)
2574 return -EPROBE_DEFER;
2575 }
2576
2577 if (!sor->aux) {
2578 if (sor->soc->supports_hdmi) {
2579 sor->ops = &tegra_sor_hdmi_ops;
2580 } else if (sor->soc->supports_lvds) {
2581 dev_err(&pdev->dev, "LVDS not supported yet\n");
2582 return -ENODEV;
2583 } else {
2584 dev_err(&pdev->dev, "unknown (non-DP) support\n");
2585 return -ENODEV;
2586 }
2587 } else {
2588 if (sor->soc->supports_edp) {
2589 sor->ops = &tegra_sor_edp_ops;
2590 } else if (sor->soc->supports_dp) {
2591 dev_err(&pdev->dev, "DisplayPort not supported yet\n");
2592 return -ENODEV;
2593 } else {
2594 dev_err(&pdev->dev, "unknown (DP) support\n");
2595 return -ENODEV;
2596 }
2597 }
2598
2599 err = tegra_output_probe(&sor->output);
2600 if (err < 0) {
2601 dev_err(&pdev->dev, "failed to probe output: %d\n", err);
2602 return err;
2603 }
2604
2605 if (sor->ops && sor->ops->probe) {
2606 err = sor->ops->probe(sor);
2607 if (err < 0) {
2608 dev_err(&pdev->dev, "failed to probe %s: %d\n",
2609 sor->ops->name, err);
2610 goto output;
2611 }
2612 }
2613
2614 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2615 sor->regs = devm_ioremap_resource(&pdev->dev, regs);
2616 if (IS_ERR(sor->regs)) {
2617 err = PTR_ERR(sor->regs);
2618 goto remove;
2619 }
2620
2621 if (!pdev->dev.pm_domain) {
2622 sor->rst = devm_reset_control_get(&pdev->dev, "sor");
2623 if (IS_ERR(sor->rst)) {
2624 err = PTR_ERR(sor->rst);
2625 dev_err(&pdev->dev, "failed to get reset control: %d\n",
2626 err);
2627 goto remove;
2628 }
2629 }
2630
2631 sor->clk = devm_clk_get(&pdev->dev, NULL);
2632 if (IS_ERR(sor->clk)) {
2633 err = PTR_ERR(sor->clk);
2634 dev_err(&pdev->dev, "failed to get module clock: %d\n", err);
2635 goto remove;
2636 }
2637
2638 if (sor->soc->supports_hdmi || sor->soc->supports_dp) {
2639 struct device_node *np = pdev->dev.of_node;
2640 const char *name;
2641
2642 /*
2643 * For backwards compatibility with Tegra210 device trees,
2644 * fall back to the old clock name "source" if the new "out"
2645 * clock is not available.
2646 */
2647 if (of_property_match_string(np, "clock-names", "out") < 0)
2648 name = "source";
2649 else
2650 name = "out";
2651
2652 sor->clk_out = devm_clk_get(&pdev->dev, name);
2653 if (IS_ERR(sor->clk_out)) {
2654 err = PTR_ERR(sor->clk_out);
2655 dev_err(sor->dev, "failed to get %s clock: %d\n",
2656 name, err);
2657 goto remove;
2658 }
2659 }
2660
2661 sor->clk_parent = devm_clk_get(&pdev->dev, "parent");
2662 if (IS_ERR(sor->clk_parent)) {
2663 err = PTR_ERR(sor->clk_parent);
2664 dev_err(&pdev->dev, "failed to get parent clock: %d\n", err);
2665 goto remove;
2666 }
2667
2668 sor->clk_safe = devm_clk_get(&pdev->dev, "safe");
2669 if (IS_ERR(sor->clk_safe)) {
2670 err = PTR_ERR(sor->clk_safe);
2671 dev_err(&pdev->dev, "failed to get safe clock: %d\n", err);
2672 goto remove;
2673 }
2674
2675 sor->clk_dp = devm_clk_get(&pdev->dev, "dp");
2676 if (IS_ERR(sor->clk_dp)) {
2677 err = PTR_ERR(sor->clk_dp);
2678 dev_err(&pdev->dev, "failed to get DP clock: %d\n", err);
2679 goto remove;
2680 }
2681
2682 /*
2683 * Starting with Tegra186, the BPMP provides an implementation for
2684 * the pad output clock, so we have to look it up from device tree.
2685 */
2686 sor->clk_pad = devm_clk_get(&pdev->dev, "pad");
2687 if (IS_ERR(sor->clk_pad)) {
2688 if (sor->clk_pad != ERR_PTR(-ENOENT)) {
2689 err = PTR_ERR(sor->clk_pad);
2690 goto remove;
2691 }
2692
2693 /*
2694 * If the pad output clock is not available, then we assume
2695 * we're on Tegra210 or earlier and have to provide our own
2696 * implementation.
2697 */
2698 sor->clk_pad = NULL;
2699 }
2700
2701 /*
2702 * The bootloader may have set up the SOR such that it's module clock
2703 * is sourced by one of the display PLLs. However, that doesn't work
2704 * without properly having set up other bits of the SOR.
2705 */
2706 err = clk_set_parent(sor->clk_out, sor->clk_safe);
2707 if (err < 0) {
2708 dev_err(&pdev->dev, "failed to use safe clock: %d\n", err);
2709 goto remove;
2710 }
2711
2712 platform_set_drvdata(pdev, sor);
2713 pm_runtime_enable(&pdev->dev);
2714
2715 /*
2716 * On Tegra210 and earlier, provide our own implementation for the
2717 * pad output clock.
2718 */
2719 if (!sor->clk_pad) {
2720 err = pm_runtime_get_sync(&pdev->dev);
2721 if (err < 0) {
2722 dev_err(&pdev->dev, "failed to get runtime PM: %d\n",
2723 err);
2724 goto remove;
2725 }
2726
2727 sor->clk_pad = tegra_clk_sor_pad_register(sor,
2728 "sor1_pad_clkout");
2729 pm_runtime_put(&pdev->dev);
2730 }
2731
2732 if (IS_ERR(sor->clk_pad)) {
2733 err = PTR_ERR(sor->clk_pad);
2734 dev_err(&pdev->dev, "failed to register SOR pad clock: %d\n",
2735 err);
2736 goto remove;
2737 }
2738
2739 INIT_LIST_HEAD(&sor->client.list);
2740 sor->client.ops = &sor_client_ops;
2741 sor->client.dev = &pdev->dev;
2742
2743 err = host1x_client_register(&sor->client);
2744 if (err < 0) {
2745 dev_err(&pdev->dev, "failed to register host1x client: %d\n",
2746 err);
2747 goto remove;
2748 }
2749
2750 return 0;
2751
2752 remove:
2753 if (sor->ops && sor->ops->remove)
2754 sor->ops->remove(sor);
2755 output:
2756 tegra_output_remove(&sor->output);
2757 return err;
2758 }
2759
2760 static int tegra_sor_remove(struct platform_device *pdev)
2761 {
2762 struct tegra_sor *sor = platform_get_drvdata(pdev);
2763 int err;
2764
2765 pm_runtime_disable(&pdev->dev);
2766
2767 err = host1x_client_unregister(&sor->client);
2768 if (err < 0) {
2769 dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
2770 err);
2771 return err;
2772 }
2773
2774 if (sor->ops && sor->ops->remove) {
2775 err = sor->ops->remove(sor);
2776 if (err < 0)
2777 dev_err(&pdev->dev, "failed to remove SOR: %d\n", err);
2778 }
2779
2780 tegra_output_remove(&sor->output);
2781
2782 return 0;
2783 }
2784
2785 #ifdef CONFIG_PM
2786 static int tegra_sor_suspend(struct device *dev)
2787 {
2788 struct tegra_sor *sor = dev_get_drvdata(dev);
2789 int err;
2790
2791 if (sor->rst) {
2792 err = reset_control_assert(sor->rst);
2793 if (err < 0) {
2794 dev_err(dev, "failed to assert reset: %d\n", err);
2795 return err;
2796 }
2797 }
2798
2799 usleep_range(1000, 2000);
2800
2801 clk_disable_unprepare(sor->clk);
2802
2803 return 0;
2804 }
2805
2806 static int tegra_sor_resume(struct device *dev)
2807 {
2808 struct tegra_sor *sor = dev_get_drvdata(dev);
2809 int err;
2810
2811 err = clk_prepare_enable(sor->clk);
2812 if (err < 0) {
2813 dev_err(dev, "failed to enable clock: %d\n", err);
2814 return err;
2815 }
2816
2817 usleep_range(1000, 2000);
2818
2819 if (sor->rst) {
2820 err = reset_control_deassert(sor->rst);
2821 if (err < 0) {
2822 dev_err(dev, "failed to deassert reset: %d\n", err);
2823 clk_disable_unprepare(sor->clk);
2824 return err;
2825 }
2826 }
2827
2828 return 0;
2829 }
2830 #endif
2831
2832 static const struct dev_pm_ops tegra_sor_pm_ops = {
2833 SET_RUNTIME_PM_OPS(tegra_sor_suspend, tegra_sor_resume, NULL)
2834 };
2835
2836 struct platform_driver tegra_sor_driver = {
2837 .driver = {
2838 .name = "tegra-sor",
2839 .of_match_table = tegra_sor_of_match,
2840 .pm = &tegra_sor_pm_ops,
2841 },
2842 .probe = tegra_sor_probe,
2843 .remove = tegra_sor_remove,
2844 };
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