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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2018, The Linux Foundation. All rights reserved.
4 * Copyright (c) 2019-2020. Linaro Limited.
5 */
6
7#include <linux/gpio/consumer.h>
8#include <linux/i2c.h>
9#include <linux/interrupt.h>
10#include <linux/media-bus-format.h>
11#include <linux/module.h>
12#include <linux/of_graph.h>
13#include <linux/platform_device.h>
14#include <linux/regmap.h>
15#include <linux/regulator/consumer.h>
16
17#include <sound/hdmi-codec.h>
18
19#include <drm/drm_atomic_helper.h>
20#include <drm/drm_bridge.h>
21#include <drm/drm_mipi_dsi.h>
22#include <drm/drm_print.h>
23#include <drm/drm_probe_helper.h>
24
25#define EDID_SEG_SIZE 256
26#define EDID_LEN 32
27#define EDID_LOOP 8
28#define KEY_DDC_ACCS_DONE 0x02
29#define DDC_NO_ACK 0x50
30
31#define LT9611_4LANES 0
32
33struct lt9611 {
34 struct device *dev;
35 struct drm_bridge bridge;
36 struct drm_connector connector;
37
38 struct regmap *regmap;
39
40 struct device_node *dsi0_node;
41 struct device_node *dsi1_node;
42 struct mipi_dsi_device *dsi0;
43 struct mipi_dsi_device *dsi1;
44 struct platform_device *audio_pdev;
45
46 bool ac_mode;
47
48 struct gpio_desc *reset_gpio;
49 struct gpio_desc *enable_gpio;
50
51 bool power_on;
52 bool sleep;
53
54 struct regulator_bulk_data supplies[2];
55
56 struct i2c_client *client;
57
58 enum drm_connector_status status;
59
60 u8 edid_buf[EDID_SEG_SIZE];
61 u32 vic;
62};
63
64#define LT9611_PAGE_CONTROL 0xff
65
66static const struct regmap_range_cfg lt9611_ranges[] = {
67 {
68 .name = "register_range",
69 .range_min = 0,
70 .range_max = 0x85ff,
71 .selector_reg = LT9611_PAGE_CONTROL,
72 .selector_mask = 0xff,
73 .selector_shift = 0,
74 .window_start = 0,
75 .window_len = 0x100,
76 },
77};
78
79static const struct regmap_config lt9611_regmap_config = {
80 .reg_bits = 8,
81 .val_bits = 8,
82 .max_register = 0xffff,
83 .ranges = lt9611_ranges,
84 .num_ranges = ARRAY_SIZE(lt9611_ranges),
85};
86
87struct lt9611_mode {
88 u16 hdisplay;
89 u16 vdisplay;
90 u8 vrefresh;
91 u8 lanes;
92 u8 intfs;
93};
94
95static struct lt9611_mode lt9611_modes[] = {
96 { 3840, 2160, 30, 4, 2 }, /* 3840x2160 24bit 30Hz 4Lane 2ports */
97 { 1920, 1080, 60, 4, 1 }, /* 1080P 24bit 60Hz 4lane 1port */
98 { 1920, 1080, 30, 3, 1 }, /* 1080P 24bit 30Hz 3lane 1port */
99 { 1920, 1080, 24, 3, 1 },
100 { 720, 480, 60, 4, 1 },
101 { 720, 576, 50, 2, 1 },
102 { 640, 480, 60, 2, 1 },
103};
104
105static struct lt9611 *bridge_to_lt9611(struct drm_bridge *bridge)
106{
107 return container_of(bridge, struct lt9611, bridge);
108}
109
110static struct lt9611 *connector_to_lt9611(struct drm_connector *connector)
111{
112 return container_of(connector, struct lt9611, connector);
113}
114
115static int lt9611_mipi_input_analog(struct lt9611 *lt9611)
116{
117 const struct reg_sequence reg_cfg[] = {
118 { 0x8106, 0x40 }, /* port A rx current */
119 { 0x810a, 0xfe }, /* port A ldo voltage set */
120 { 0x810b, 0xbf }, /* enable port A lprx */
121 { 0x8111, 0x40 }, /* port B rx current */
122 { 0x8115, 0xfe }, /* port B ldo voltage set */
123 { 0x8116, 0xbf }, /* enable port B lprx */
124
125 { 0x811c, 0x03 }, /* PortA clk lane no-LP mode */
126 { 0x8120, 0x03 }, /* PortB clk lane with-LP mode */
127 };
128
129 return regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg));
130}
131
132static int lt9611_mipi_input_digital(struct lt9611 *lt9611,
133 const struct drm_display_mode *mode)
134{
135 struct reg_sequence reg_cfg[] = {
136 { 0x8300, LT9611_4LANES },
137 { 0x830a, 0x00 },
138 { 0x824f, 0x80 },
139 { 0x8250, 0x10 },
140 { 0x8302, 0x0a },
141 { 0x8306, 0x0a },
142 };
143
144 if (mode->hdisplay == 3840)
145 reg_cfg[1].def = 0x03;
146
147 return regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg));
148}
149
150static void lt9611_mipi_video_setup(struct lt9611 *lt9611,
151 const struct drm_display_mode *mode)
152{
153 u32 h_total, hactive, hsync_len, hfront_porch, hsync_porch;
154 u32 v_total, vactive, vsync_len, vfront_porch, vsync_porch;
155
156 h_total = mode->htotal;
157 v_total = mode->vtotal;
158
159 hactive = mode->hdisplay;
160 hsync_len = mode->hsync_end - mode->hsync_start;
161 hfront_porch = mode->hsync_start - mode->hdisplay;
162 hsync_porch = hsync_len + mode->htotal - mode->hsync_end;
163
164 vactive = mode->vdisplay;
165 vsync_len = mode->vsync_end - mode->vsync_start;
166 vfront_porch = mode->vsync_start - mode->vdisplay;
167 vsync_porch = vsync_len + mode->vtotal - mode->vsync_end;
168
169 regmap_write(lt9611->regmap, 0x830d, (u8)(v_total / 256));
170 regmap_write(lt9611->regmap, 0x830e, (u8)(v_total % 256));
171
172 regmap_write(lt9611->regmap, 0x830f, (u8)(vactive / 256));
173 regmap_write(lt9611->regmap, 0x8310, (u8)(vactive % 256));
174
175 regmap_write(lt9611->regmap, 0x8311, (u8)(h_total / 256));
176 regmap_write(lt9611->regmap, 0x8312, (u8)(h_total % 256));
177
178 regmap_write(lt9611->regmap, 0x8313, (u8)(hactive / 256));
179 regmap_write(lt9611->regmap, 0x8314, (u8)(hactive % 256));
180
181 regmap_write(lt9611->regmap, 0x8315, (u8)(vsync_len % 256));
182 regmap_write(lt9611->regmap, 0x8316, (u8)(hsync_len % 256));
183
184 regmap_write(lt9611->regmap, 0x8317, (u8)(vfront_porch % 256));
185
186 regmap_write(lt9611->regmap, 0x8318, (u8)(vsync_porch % 256));
187
188 regmap_write(lt9611->regmap, 0x8319, (u8)(hfront_porch % 256));
189
190 regmap_write(lt9611->regmap, 0x831a, (u8)(hsync_porch / 256));
191 regmap_write(lt9611->regmap, 0x831b, (u8)(hsync_porch % 256));
192}
193
194static void lt9611_pcr_setup(struct lt9611 *lt9611, const struct drm_display_mode *mode)
195{
196 const struct reg_sequence reg_cfg[] = {
197 { 0x830b, 0x01 },
198 { 0x830c, 0x10 },
199 { 0x8348, 0x00 },
200 { 0x8349, 0x81 },
201
202 /* stage 1 */
203 { 0x8321, 0x4a },
204 { 0x8324, 0x71 },
205 { 0x8325, 0x30 },
206 { 0x832a, 0x01 },
207
208 /* stage 2 */
209 { 0x834a, 0x40 },
210 { 0x831d, 0x10 },
211
212 /* MK limit */
213 { 0x832d, 0x38 },
214 { 0x8331, 0x08 },
215 };
216 const struct reg_sequence reg_cfg2[] = {
217 { 0x830b, 0x03 },
218 { 0x830c, 0xd0 },
219 { 0x8348, 0x03 },
220 { 0x8349, 0xe0 },
221 { 0x8324, 0x72 },
222 { 0x8325, 0x00 },
223 { 0x832a, 0x01 },
224 { 0x834a, 0x10 },
225 { 0x831d, 0x10 },
226 { 0x8326, 0x37 },
227 };
228
229 regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg));
230
231 switch (mode->hdisplay) {
232 case 640:
233 regmap_write(lt9611->regmap, 0x8326, 0x14);
234 break;
235 case 1920:
236 regmap_write(lt9611->regmap, 0x8326, 0x37);
237 break;
238 case 3840:
239 regmap_multi_reg_write(lt9611->regmap, reg_cfg2, ARRAY_SIZE(reg_cfg2));
240 break;
241 }
242
243 /* pcr rst */
244 regmap_write(lt9611->regmap, 0x8011, 0x5a);
245 regmap_write(lt9611->regmap, 0x8011, 0xfa);
246}
247
248static int lt9611_pll_setup(struct lt9611 *lt9611, const struct drm_display_mode *mode)
249{
250 unsigned int pclk = mode->clock;
251 const struct reg_sequence reg_cfg[] = {
252 /* txpll init */
253 { 0x8123, 0x40 },
254 { 0x8124, 0x64 },
255 { 0x8125, 0x80 },
256 { 0x8126, 0x55 },
257 { 0x812c, 0x37 },
258 { 0x812f, 0x01 },
259 { 0x8126, 0x55 },
260 { 0x8127, 0x66 },
261 { 0x8128, 0x88 },
262 };
263
264 regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg));
265
266 if (pclk > 150000)
267 regmap_write(lt9611->regmap, 0x812d, 0x88);
268 else if (pclk > 70000)
269 regmap_write(lt9611->regmap, 0x812d, 0x99);
270 else
271 regmap_write(lt9611->regmap, 0x812d, 0xaa);
272
273 /*
274 * first divide pclk by 2 first
275 * - write divide by 64k to 19:16 bits which means shift by 17
276 * - write divide by 256 to 15:8 bits which means shift by 9
277 * - write remainder to 7:0 bits, which means shift by 1
278 */
279 regmap_write(lt9611->regmap, 0x82e3, pclk >> 17); /* pclk[19:16] */
280 regmap_write(lt9611->regmap, 0x82e4, pclk >> 9); /* pclk[15:8] */
281 regmap_write(lt9611->regmap, 0x82e5, pclk >> 1); /* pclk[7:0] */
282
283 regmap_write(lt9611->regmap, 0x82de, 0x20);
284 regmap_write(lt9611->regmap, 0x82de, 0xe0);
285
286 regmap_write(lt9611->regmap, 0x8016, 0xf1);
287 regmap_write(lt9611->regmap, 0x8016, 0xf3);
288
289 return 0;
290}
291
292static int lt9611_read_video_check(struct lt9611 *lt9611, unsigned int reg)
293{
294 unsigned int temp, temp2;
295 int ret;
296
297 ret = regmap_read(lt9611->regmap, reg, &temp);
298 if (ret)
299 return ret;
300 temp <<= 8;
301 ret = regmap_read(lt9611->regmap, reg + 1, &temp2);
302 if (ret)
303 return ret;
304
305 return (temp + temp2);
306}
307
308static int lt9611_video_check(struct lt9611 *lt9611)
309{
310 u32 v_total, vactive, hactive_a, hactive_b, h_total_sysclk;
311 int temp;
312
313 /* top module video check */
314
315 /* vactive */
316 temp = lt9611_read_video_check(lt9611, 0x8282);
317 if (temp < 0)
318 goto end;
319 vactive = temp;
320
321 /* v_total */
322 temp = lt9611_read_video_check(lt9611, 0x826c);
323 if (temp < 0)
324 goto end;
325 v_total = temp;
326
327 /* h_total_sysclk */
328 temp = lt9611_read_video_check(lt9611, 0x8286);
329 if (temp < 0)
330 goto end;
331 h_total_sysclk = temp;
332
333 /* hactive_a */
334 temp = lt9611_read_video_check(lt9611, 0x8382);
335 if (temp < 0)
336 goto end;
337 hactive_a = temp / 3;
338
339 /* hactive_b */
340 temp = lt9611_read_video_check(lt9611, 0x8386);
341 if (temp < 0)
342 goto end;
343 hactive_b = temp / 3;
344
345 dev_info(lt9611->dev,
346 "video check: hactive_a=%d, hactive_b=%d, vactive=%d, v_total=%d, h_total_sysclk=%d\n",
347 hactive_a, hactive_b, vactive, v_total, h_total_sysclk);
348
349 return 0;
350
351end:
352 dev_err(lt9611->dev, "read video check error\n");
353 return temp;
354}
355
356static void lt9611_hdmi_tx_digital(struct lt9611 *lt9611)
357{
358 regmap_write(lt9611->regmap, 0x8443, 0x46 - lt9611->vic);
359 regmap_write(lt9611->regmap, 0x8447, lt9611->vic);
360 regmap_write(lt9611->regmap, 0x843d, 0x0a); /* UD1 infoframe */
361
362 regmap_write(lt9611->regmap, 0x82d6, 0x8c);
363 regmap_write(lt9611->regmap, 0x82d7, 0x04);
364}
365
366static void lt9611_hdmi_tx_phy(struct lt9611 *lt9611)
367{
368 struct reg_sequence reg_cfg[] = {
369 { 0x8130, 0x6a },
370 { 0x8131, 0x44 }, /* HDMI DC mode */
371 { 0x8132, 0x4a },
372 { 0x8133, 0x0b },
373 { 0x8134, 0x00 },
374 { 0x8135, 0x00 },
375 { 0x8136, 0x00 },
376 { 0x8137, 0x44 },
377 { 0x813f, 0x0f },
378 { 0x8140, 0xa0 },
379 { 0x8141, 0xa0 },
380 { 0x8142, 0xa0 },
381 { 0x8143, 0xa0 },
382 { 0x8144, 0x0a },
383 };
384
385 /* HDMI AC mode */
386 if (lt9611->ac_mode)
387 reg_cfg[2].def = 0x73;
388
389 regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg));
390}
391
392static irqreturn_t lt9611_irq_thread_handler(int irq, void *dev_id)
393{
394 struct lt9611 *lt9611 = dev_id;
395 unsigned int irq_flag0 = 0;
396 unsigned int irq_flag3 = 0;
397
398 regmap_read(lt9611->regmap, 0x820f, &irq_flag3);
399 regmap_read(lt9611->regmap, 0x820c, &irq_flag0);
400
401 /* hpd changed low */
402 if (irq_flag3 & 0x80) {
403 dev_info(lt9611->dev, "hdmi cable disconnected\n");
404
405 regmap_write(lt9611->regmap, 0x8207, 0xbf);
406 regmap_write(lt9611->regmap, 0x8207, 0x3f);
407 }
408
409 /* hpd changed high */
410 if (irq_flag3 & 0x40) {
411 dev_info(lt9611->dev, "hdmi cable connected\n");
412
413 regmap_write(lt9611->regmap, 0x8207, 0x7f);
414 regmap_write(lt9611->regmap, 0x8207, 0x3f);
415 }
416
417 if (irq_flag3 & 0xc0 && lt9611->bridge.dev)
418 drm_kms_helper_hotplug_event(lt9611->bridge.dev);
419
420 /* video input changed */
421 if (irq_flag0 & 0x01) {
422 dev_info(lt9611->dev, "video input changed\n");
423 regmap_write(lt9611->regmap, 0x829e, 0xff);
424 regmap_write(lt9611->regmap, 0x829e, 0xf7);
425 regmap_write(lt9611->regmap, 0x8204, 0xff);
426 regmap_write(lt9611->regmap, 0x8204, 0xfe);
427 }
428
429 return IRQ_HANDLED;
430}
431
432static void lt9611_enable_hpd_interrupts(struct lt9611 *lt9611)
433{
434 unsigned int val;
435
436 regmap_read(lt9611->regmap, 0x8203, &val);
437
438 val &= ~0xc0;
439 regmap_write(lt9611->regmap, 0x8203, val);
440 regmap_write(lt9611->regmap, 0x8207, 0xff); /* clear */
441 regmap_write(lt9611->regmap, 0x8207, 0x3f);
442}
443
444static void lt9611_sleep_setup(struct lt9611 *lt9611)
445{
446 const struct reg_sequence sleep_setup[] = {
447 { 0x8024, 0x76 },
448 { 0x8023, 0x01 },
449 { 0x8157, 0x03 }, /* set addr pin as output */
450 { 0x8149, 0x0b },
451 { 0x8151, 0x30 }, /* disable IRQ */
452 { 0x8102, 0x48 }, /* MIPI Rx power down */
453 { 0x8123, 0x80 },
454 { 0x8130, 0x00 },
455 { 0x8100, 0x01 }, /* bandgap power down */
456 { 0x8101, 0x00 }, /* system clk power down */
457 };
458
459 regmap_multi_reg_write(lt9611->regmap,
460 sleep_setup, ARRAY_SIZE(sleep_setup));
461 lt9611->sleep = true;
462}
463
464static int lt9611_power_on(struct lt9611 *lt9611)
465{
466 int ret;
467 const struct reg_sequence seq[] = {
468 /* LT9611_System_Init */
469 { 0x8101, 0x18 }, /* sel xtal clock */
470
471 /* timer for frequency meter */
472 { 0x821b, 0x69 }, /* timer 2 */
473 { 0x821c, 0x78 },
474 { 0x82cb, 0x69 }, /* timer 1 */
475 { 0x82cc, 0x78 },
476
477 /* irq init */
478 { 0x8251, 0x01 },
479 { 0x8258, 0x0a }, /* hpd irq */
480 { 0x8259, 0x80 }, /* hpd debounce width */
481 { 0x829e, 0xf7 }, /* video check irq */
482
483 /* power consumption for work */
484 { 0x8004, 0xf0 },
485 { 0x8006, 0xf0 },
486 { 0x800a, 0x80 },
487 { 0x800b, 0x40 },
488 { 0x800d, 0xef },
489 { 0x8011, 0xfa },
490 };
491
492 if (lt9611->power_on)
493 return 0;
494
495 ret = regmap_multi_reg_write(lt9611->regmap, seq, ARRAY_SIZE(seq));
496 if (!ret)
497 lt9611->power_on = true;
498
499 return ret;
500}
501
502static int lt9611_power_off(struct lt9611 *lt9611)
503{
504 int ret;
505
506 ret = regmap_write(lt9611->regmap, 0x8130, 0x6a);
507 if (!ret)
508 lt9611->power_on = false;
509
510 return ret;
511}
512
513static void lt9611_reset(struct lt9611 *lt9611)
514{
515 gpiod_set_value_cansleep(lt9611->reset_gpio, 1);
516 msleep(20);
517
518 gpiod_set_value_cansleep(lt9611->reset_gpio, 0);
519 msleep(20);
520
521 gpiod_set_value_cansleep(lt9611->reset_gpio, 1);
522 msleep(100);
523}
524
525static void lt9611_assert_5v(struct lt9611 *lt9611)
526{
527 if (!lt9611->enable_gpio)
528 return;
529
530 gpiod_set_value_cansleep(lt9611->enable_gpio, 1);
531 msleep(20);
532}
533
534static int lt9611_regulator_init(struct lt9611 *lt9611)
535{
536 int ret;
537
538 lt9611->supplies[0].supply = "vdd";
539 lt9611->supplies[1].supply = "vcc";
540
541 ret = devm_regulator_bulk_get(lt9611->dev, 2, lt9611->supplies);
542 if (ret < 0)
543 return ret;
544
545 return regulator_set_load(lt9611->supplies[0].consumer, 300000);
546}
547
548static int lt9611_regulator_enable(struct lt9611 *lt9611)
549{
550 int ret;
551
552 ret = regulator_enable(lt9611->supplies[0].consumer);
553 if (ret < 0)
554 return ret;
555
556 usleep_range(1000, 10000);
557
558 ret = regulator_enable(lt9611->supplies[1].consumer);
559 if (ret < 0) {
560 regulator_disable(lt9611->supplies[0].consumer);
561 return ret;
562 }
563
564 return 0;
565}
566
567static struct lt9611_mode *lt9611_find_mode(const struct drm_display_mode *mode)
568{
569 int i;
570
571 for (i = 0; i < ARRAY_SIZE(lt9611_modes); i++) {
572 if (lt9611_modes[i].hdisplay == mode->hdisplay &&
573 lt9611_modes[i].vdisplay == mode->vdisplay &&
574 lt9611_modes[i].vrefresh == drm_mode_vrefresh(mode)) {
575 return <9611_modes[i];
576 }
577 }
578
579 return NULL;
580}
581
582/* connector funcs */
583static enum drm_connector_status __lt9611_detect(struct lt9611 *lt9611)
584{
585 unsigned int reg_val = 0;
586 int connected = 0;
587
588 regmap_read(lt9611->regmap, 0x825e, ®_val);
589 connected = (reg_val & (BIT(2) | BIT(0)));
590
591 lt9611->status = connected ? connector_status_connected :
592 connector_status_disconnected;
593
594 return lt9611->status;
595}
596
597static enum drm_connector_status
598lt9611_connector_detect(struct drm_connector *connector, bool force)
599{
600 return __lt9611_detect(connector_to_lt9611(connector));
601}
602
603static int lt9611_read_edid(struct lt9611 *lt9611)
604{
605 unsigned int temp;
606 int ret = 0;
607 int i, j;
608
609 /* memset to clear old buffer, if any */
610 memset(lt9611->edid_buf, 0, sizeof(lt9611->edid_buf));
611
612 regmap_write(lt9611->regmap, 0x8503, 0xc9);
613
614 /* 0xA0 is EDID device address */
615 regmap_write(lt9611->regmap, 0x8504, 0xa0);
616 /* 0x00 is EDID offset address */
617 regmap_write(lt9611->regmap, 0x8505, 0x00);
618
619 /* length for read */
620 regmap_write(lt9611->regmap, 0x8506, EDID_LEN);
621 regmap_write(lt9611->regmap, 0x8514, 0x7f);
622
623 for (i = 0; i < EDID_LOOP; i++) {
624 /* offset address */
625 regmap_write(lt9611->regmap, 0x8505, i * EDID_LEN);
626 regmap_write(lt9611->regmap, 0x8507, 0x36);
627 regmap_write(lt9611->regmap, 0x8507, 0x31);
628 regmap_write(lt9611->regmap, 0x8507, 0x37);
629 usleep_range(5000, 10000);
630
631 regmap_read(lt9611->regmap, 0x8540, &temp);
632
633 if (temp & KEY_DDC_ACCS_DONE) {
634 for (j = 0; j < EDID_LEN; j++) {
635 regmap_read(lt9611->regmap, 0x8583, &temp);
636 lt9611->edid_buf[i * EDID_LEN + j] = temp;
637 }
638
639 } else if (temp & DDC_NO_ACK) { /* DDC No Ack or Abitration lost */
640 dev_err(lt9611->dev, "read edid failed: no ack\n");
641 ret = -EIO;
642 goto end;
643
644 } else {
645 dev_err(lt9611->dev, "read edid failed: access not done\n");
646 ret = -EIO;
647 goto end;
648 }
649 }
650
651end:
652 regmap_write(lt9611->regmap, 0x8507, 0x1f);
653 return ret;
654}
655
656static int
657lt9611_get_edid_block(void *data, u8 *buf, unsigned int block, size_t len)
658{
659 struct lt9611 *lt9611 = data;
660 int ret;
661
662 if (len > 128)
663 return -EINVAL;
664
665 /* supports up to 1 extension block */
666 /* TODO: add support for more extension blocks */
667 if (block > 1)
668 return -EINVAL;
669
670 if (block == 0) {
671 ret = lt9611_read_edid(lt9611);
672 if (ret) {
673 dev_err(lt9611->dev, "edid read failed\n");
674 return ret;
675 }
676 }
677
678 block %= 2;
679 memcpy(buf, lt9611->edid_buf + (block * 128), len);
680
681 return 0;
682}
683
684static int lt9611_connector_get_modes(struct drm_connector *connector)
685{
686 struct lt9611 *lt9611 = connector_to_lt9611(connector);
687 unsigned int count;
688 struct edid *edid;
689
690 lt9611_power_on(lt9611);
691 edid = drm_do_get_edid(connector, lt9611_get_edid_block, lt9611);
692 drm_connector_update_edid_property(connector, edid);
693 count = drm_add_edid_modes(connector, edid);
694 kfree(edid);
695
696 return count;
697}
698
699static enum drm_mode_status
700lt9611_connector_mode_valid(struct drm_connector *connector,
701 struct drm_display_mode *mode)
702{
703 struct lt9611_mode *lt9611_mode = lt9611_find_mode(mode);
704
705 return lt9611_mode ? MODE_OK : MODE_BAD;
706}
707
708/* bridge funcs */
709static void
710lt9611_bridge_atomic_enable(struct drm_bridge *bridge,
711 struct drm_bridge_state *old_bridge_state)
712{
713 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
714
715 if (lt9611_power_on(lt9611)) {
716 dev_err(lt9611->dev, "power on failed\n");
717 return;
718 }
719
720 lt9611_mipi_input_analog(lt9611);
721 lt9611_hdmi_tx_digital(lt9611);
722 lt9611_hdmi_tx_phy(lt9611);
723
724 msleep(500);
725
726 lt9611_video_check(lt9611);
727
728 /* Enable HDMI output */
729 regmap_write(lt9611->regmap, 0x8130, 0xea);
730}
731
732static void
733lt9611_bridge_atomic_disable(struct drm_bridge *bridge,
734 struct drm_bridge_state *old_bridge_state)
735{
736 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
737 int ret;
738
739 /* Disable HDMI output */
740 ret = regmap_write(lt9611->regmap, 0x8130, 0x6a);
741 if (ret) {
742 dev_err(lt9611->dev, "video on failed\n");
743 return;
744 }
745
746 if (lt9611_power_off(lt9611)) {
747 dev_err(lt9611->dev, "power on failed\n");
748 return;
749 }
750}
751
752static struct
753drm_connector_helper_funcs lt9611_bridge_connector_helper_funcs = {
754 .get_modes = lt9611_connector_get_modes,
755 .mode_valid = lt9611_connector_mode_valid,
756};
757
758static const struct drm_connector_funcs lt9611_bridge_connector_funcs = {
759 .fill_modes = drm_helper_probe_single_connector_modes,
760 .detect = lt9611_connector_detect,
761 .destroy = drm_connector_cleanup,
762 .reset = drm_atomic_helper_connector_reset,
763 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
764 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
765};
766
767static struct mipi_dsi_device *lt9611_attach_dsi(struct lt9611 *lt9611,
768 struct device_node *dsi_node)
769{
770 const struct mipi_dsi_device_info info = { "lt9611", 0, NULL };
771 struct mipi_dsi_device *dsi;
772 struct mipi_dsi_host *host;
773 struct device *dev = lt9611->dev;
774 int ret;
775
776 host = of_find_mipi_dsi_host_by_node(dsi_node);
777 if (!host) {
778 dev_err(lt9611->dev, "failed to find dsi host\n");
779 return ERR_PTR(-EPROBE_DEFER);
780 }
781
782 dsi = devm_mipi_dsi_device_register_full(dev, host, &info);
783 if (IS_ERR(dsi)) {
784 dev_err(lt9611->dev, "failed to create dsi device\n");
785 return dsi;
786 }
787
788 dsi->lanes = 4;
789 dsi->format = MIPI_DSI_FMT_RGB888;
790 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
791 MIPI_DSI_MODE_VIDEO_HSE;
792
793 ret = devm_mipi_dsi_attach(dev, dsi);
794 if (ret < 0) {
795 dev_err(dev, "failed to attach dsi to host\n");
796 return ERR_PTR(ret);
797 }
798
799 return dsi;
800}
801
802static int lt9611_connector_init(struct drm_bridge *bridge, struct lt9611 *lt9611)
803{
804 int ret;
805
806 ret = drm_connector_init(bridge->dev, <9611->connector,
807 <9611_bridge_connector_funcs,
808 DRM_MODE_CONNECTOR_HDMIA);
809 if (ret) {
810 DRM_ERROR("Failed to initialize connector with drm\n");
811 return ret;
812 }
813
814 drm_connector_helper_add(<9611->connector,
815 <9611_bridge_connector_helper_funcs);
816
817 if (!bridge->encoder) {
818 DRM_ERROR("Parent encoder object not found");
819 return -ENODEV;
820 }
821
822 drm_connector_attach_encoder(<9611->connector, bridge->encoder);
823
824 return 0;
825}
826
827static int lt9611_bridge_attach(struct drm_bridge *bridge,
828 enum drm_bridge_attach_flags flags)
829{
830 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
831 int ret;
832
833 if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
834 ret = lt9611_connector_init(bridge, lt9611);
835 if (ret < 0)
836 return ret;
837 }
838
839 return 0;
840}
841
842static enum drm_mode_status lt9611_bridge_mode_valid(struct drm_bridge *bridge,
843 const struct drm_display_info *info,
844 const struct drm_display_mode *mode)
845{
846 struct lt9611_mode *lt9611_mode = lt9611_find_mode(mode);
847 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
848
849 if (!lt9611_mode)
850 return MODE_BAD;
851 else if (lt9611_mode->intfs > 1 && !lt9611->dsi1)
852 return MODE_PANEL;
853 else
854 return MODE_OK;
855}
856
857static void lt9611_bridge_pre_enable(struct drm_bridge *bridge)
858{
859 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
860
861 if (!lt9611->sleep)
862 return;
863
864 lt9611_reset(lt9611);
865 regmap_write(lt9611->regmap, 0x80ee, 0x01);
866
867 lt9611->sleep = false;
868}
869
870static void
871lt9611_bridge_atomic_post_disable(struct drm_bridge *bridge,
872 struct drm_bridge_state *old_bridge_state)
873{
874 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
875
876 lt9611_sleep_setup(lt9611);
877}
878
879static void lt9611_bridge_mode_set(struct drm_bridge *bridge,
880 const struct drm_display_mode *mode,
881 const struct drm_display_mode *adj_mode)
882{
883 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
884 struct hdmi_avi_infoframe avi_frame;
885 int ret;
886
887 lt9611_bridge_pre_enable(bridge);
888
889 lt9611_mipi_input_digital(lt9611, mode);
890 lt9611_pll_setup(lt9611, mode);
891 lt9611_mipi_video_setup(lt9611, mode);
892 lt9611_pcr_setup(lt9611, mode);
893
894 ret = drm_hdmi_avi_infoframe_from_display_mode(&avi_frame,
895 <9611->connector,
896 mode);
897 if (!ret)
898 lt9611->vic = avi_frame.video_code;
899}
900
901static enum drm_connector_status lt9611_bridge_detect(struct drm_bridge *bridge)
902{
903 return __lt9611_detect(bridge_to_lt9611(bridge));
904}
905
906static struct edid *lt9611_bridge_get_edid(struct drm_bridge *bridge,
907 struct drm_connector *connector)
908{
909 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
910
911 lt9611_power_on(lt9611);
912 return drm_do_get_edid(connector, lt9611_get_edid_block, lt9611);
913}
914
915static void lt9611_bridge_hpd_enable(struct drm_bridge *bridge)
916{
917 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
918
919 lt9611_enable_hpd_interrupts(lt9611);
920}
921
922#define MAX_INPUT_SEL_FORMATS 1
923
924static u32 *
925lt9611_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
926 struct drm_bridge_state *bridge_state,
927 struct drm_crtc_state *crtc_state,
928 struct drm_connector_state *conn_state,
929 u32 output_fmt,
930 unsigned int *num_input_fmts)
931{
932 u32 *input_fmts;
933
934 *num_input_fmts = 0;
935
936 input_fmts = kcalloc(MAX_INPUT_SEL_FORMATS, sizeof(*input_fmts),
937 GFP_KERNEL);
938 if (!input_fmts)
939 return NULL;
940
941 /* This is the DSI-end bus format */
942 input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24;
943 *num_input_fmts = 1;
944
945 return input_fmts;
946}
947
948static const struct drm_bridge_funcs lt9611_bridge_funcs = {
949 .attach = lt9611_bridge_attach,
950 .mode_valid = lt9611_bridge_mode_valid,
951 .mode_set = lt9611_bridge_mode_set,
952 .detect = lt9611_bridge_detect,
953 .get_edid = lt9611_bridge_get_edid,
954 .hpd_enable = lt9611_bridge_hpd_enable,
955
956 .atomic_enable = lt9611_bridge_atomic_enable,
957 .atomic_disable = lt9611_bridge_atomic_disable,
958 .atomic_post_disable = lt9611_bridge_atomic_post_disable,
959 .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
960 .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
961 .atomic_reset = drm_atomic_helper_bridge_reset,
962 .atomic_get_input_bus_fmts = lt9611_atomic_get_input_bus_fmts,
963};
964
965static int lt9611_parse_dt(struct device *dev,
966 struct lt9611 *lt9611)
967{
968 lt9611->dsi0_node = of_graph_get_remote_node(dev->of_node, 0, -1);
969 if (!lt9611->dsi0_node) {
970 dev_err(lt9611->dev, "failed to get remote node for primary dsi\n");
971 return -ENODEV;
972 }
973
974 lt9611->dsi1_node = of_graph_get_remote_node(dev->of_node, 1, -1);
975
976 lt9611->ac_mode = of_property_read_bool(dev->of_node, "lt,ac-mode");
977
978 return 0;
979}
980
981static int lt9611_gpio_init(struct lt9611 *lt9611)
982{
983 struct device *dev = lt9611->dev;
984
985 lt9611->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
986 if (IS_ERR(lt9611->reset_gpio)) {
987 dev_err(dev, "failed to acquire reset gpio\n");
988 return PTR_ERR(lt9611->reset_gpio);
989 }
990
991 lt9611->enable_gpio = devm_gpiod_get_optional(dev, "enable",
992 GPIOD_OUT_LOW);
993 if (IS_ERR(lt9611->enable_gpio)) {
994 dev_err(dev, "failed to acquire enable gpio\n");
995 return PTR_ERR(lt9611->enable_gpio);
996 }
997
998 return 0;
999}
1000
1001static int lt9611_read_device_rev(struct lt9611 *lt9611)
1002{
1003 unsigned int rev;
1004 int ret;
1005
1006 regmap_write(lt9611->regmap, 0x80ee, 0x01);
1007 ret = regmap_read(lt9611->regmap, 0x8002, &rev);
1008 if (ret)
1009 dev_err(lt9611->dev, "failed to read revision: %d\n", ret);
1010 else
1011 dev_info(lt9611->dev, "LT9611 revision: 0x%x\n", rev);
1012
1013 return ret;
1014}
1015
1016static int lt9611_hdmi_hw_params(struct device *dev, void *data,
1017 struct hdmi_codec_daifmt *fmt,
1018 struct hdmi_codec_params *hparms)
1019{
1020 struct lt9611 *lt9611 = data;
1021
1022 if (hparms->sample_rate == 48000)
1023 regmap_write(lt9611->regmap, 0x840f, 0x2b);
1024 else if (hparms->sample_rate == 96000)
1025 regmap_write(lt9611->regmap, 0x840f, 0xab);
1026 else
1027 return -EINVAL;
1028
1029 regmap_write(lt9611->regmap, 0x8435, 0x00);
1030 regmap_write(lt9611->regmap, 0x8436, 0x18);
1031 regmap_write(lt9611->regmap, 0x8437, 0x00);
1032
1033 return 0;
1034}
1035
1036static int lt9611_audio_startup(struct device *dev, void *data)
1037{
1038 struct lt9611 *lt9611 = data;
1039
1040 regmap_write(lt9611->regmap, 0x82d6, 0x8c);
1041 regmap_write(lt9611->regmap, 0x82d7, 0x04);
1042
1043 regmap_write(lt9611->regmap, 0x8406, 0x08);
1044 regmap_write(lt9611->regmap, 0x8407, 0x10);
1045
1046 regmap_write(lt9611->regmap, 0x8434, 0xd5);
1047
1048 return 0;
1049}
1050
1051static void lt9611_audio_shutdown(struct device *dev, void *data)
1052{
1053 struct lt9611 *lt9611 = data;
1054
1055 regmap_write(lt9611->regmap, 0x8406, 0x00);
1056 regmap_write(lt9611->regmap, 0x8407, 0x00);
1057}
1058
1059static int lt9611_hdmi_i2s_get_dai_id(struct snd_soc_component *component,
1060 struct device_node *endpoint)
1061{
1062 struct of_endpoint of_ep;
1063 int ret;
1064
1065 ret = of_graph_parse_endpoint(endpoint, &of_ep);
1066 if (ret < 0)
1067 return ret;
1068
1069 /*
1070 * HDMI sound should be located as reg = <2>
1071 * Then, it is sound port 0
1072 */
1073 if (of_ep.port == 2)
1074 return 0;
1075
1076 return -EINVAL;
1077}
1078
1079static const struct hdmi_codec_ops lt9611_codec_ops = {
1080 .hw_params = lt9611_hdmi_hw_params,
1081 .audio_shutdown = lt9611_audio_shutdown,
1082 .audio_startup = lt9611_audio_startup,
1083 .get_dai_id = lt9611_hdmi_i2s_get_dai_id,
1084};
1085
1086static struct hdmi_codec_pdata codec_data = {
1087 .ops = <9611_codec_ops,
1088 .max_i2s_channels = 8,
1089 .i2s = 1,
1090};
1091
1092static int lt9611_audio_init(struct device *dev, struct lt9611 *lt9611)
1093{
1094 codec_data.data = lt9611;
1095 lt9611->audio_pdev =
1096 platform_device_register_data(dev, HDMI_CODEC_DRV_NAME,
1097 PLATFORM_DEVID_AUTO,
1098 &codec_data, sizeof(codec_data));
1099
1100 return PTR_ERR_OR_ZERO(lt9611->audio_pdev);
1101}
1102
1103static void lt9611_audio_exit(struct lt9611 *lt9611)
1104{
1105 if (lt9611->audio_pdev) {
1106 platform_device_unregister(lt9611->audio_pdev);
1107 lt9611->audio_pdev = NULL;
1108 }
1109}
1110
1111static int lt9611_probe(struct i2c_client *client,
1112 const struct i2c_device_id *id)
1113{
1114 struct lt9611 *lt9611;
1115 struct device *dev = &client->dev;
1116 int ret;
1117
1118 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
1119 dev_err(dev, "device doesn't support I2C\n");
1120 return -ENODEV;
1121 }
1122
1123 lt9611 = devm_kzalloc(dev, sizeof(*lt9611), GFP_KERNEL);
1124 if (!lt9611)
1125 return -ENOMEM;
1126
1127 lt9611->dev = dev;
1128 lt9611->client = client;
1129 lt9611->sleep = false;
1130
1131 lt9611->regmap = devm_regmap_init_i2c(client, <9611_regmap_config);
1132 if (IS_ERR(lt9611->regmap)) {
1133 dev_err(lt9611->dev, "regmap i2c init failed\n");
1134 return PTR_ERR(lt9611->regmap);
1135 }
1136
1137 ret = lt9611_parse_dt(dev, lt9611);
1138 if (ret) {
1139 dev_err(dev, "failed to parse device tree\n");
1140 return ret;
1141 }
1142
1143 ret = lt9611_gpio_init(lt9611);
1144 if (ret < 0)
1145 goto err_of_put;
1146
1147 ret = lt9611_regulator_init(lt9611);
1148 if (ret < 0)
1149 goto err_of_put;
1150
1151 lt9611_assert_5v(lt9611);
1152
1153 ret = lt9611_regulator_enable(lt9611);
1154 if (ret)
1155 goto err_of_put;
1156
1157 lt9611_reset(lt9611);
1158
1159 ret = lt9611_read_device_rev(lt9611);
1160 if (ret) {
1161 dev_err(dev, "failed to read chip rev\n");
1162 goto err_disable_regulators;
1163 }
1164
1165 ret = devm_request_threaded_irq(dev, client->irq, NULL,
1166 lt9611_irq_thread_handler,
1167 IRQF_ONESHOT, "lt9611", lt9611);
1168 if (ret) {
1169 dev_err(dev, "failed to request irq\n");
1170 goto err_disable_regulators;
1171 }
1172
1173 i2c_set_clientdata(client, lt9611);
1174
1175 lt9611->bridge.funcs = <9611_bridge_funcs;
1176 lt9611->bridge.of_node = client->dev.of_node;
1177 lt9611->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID |
1178 DRM_BRIDGE_OP_HPD | DRM_BRIDGE_OP_MODES;
1179 lt9611->bridge.type = DRM_MODE_CONNECTOR_HDMIA;
1180
1181 drm_bridge_add(<9611->bridge);
1182
1183 /* Attach primary DSI */
1184 lt9611->dsi0 = lt9611_attach_dsi(lt9611, lt9611->dsi0_node);
1185 if (IS_ERR(lt9611->dsi0)) {
1186 ret = PTR_ERR(lt9611->dsi0);
1187 goto err_remove_bridge;
1188 }
1189
1190 /* Attach secondary DSI, if specified */
1191 if (lt9611->dsi1_node) {
1192 lt9611->dsi1 = lt9611_attach_dsi(lt9611, lt9611->dsi1_node);
1193 if (IS_ERR(lt9611->dsi1)) {
1194 ret = PTR_ERR(lt9611->dsi1);
1195 goto err_remove_bridge;
1196 }
1197 }
1198
1199 lt9611_enable_hpd_interrupts(lt9611);
1200
1201 ret = lt9611_audio_init(dev, lt9611);
1202 if (ret)
1203 goto err_remove_bridge;
1204
1205 return 0;
1206
1207err_remove_bridge:
1208 drm_bridge_remove(<9611->bridge);
1209
1210err_disable_regulators:
1211 regulator_bulk_disable(ARRAY_SIZE(lt9611->supplies), lt9611->supplies);
1212
1213err_of_put:
1214 of_node_put(lt9611->dsi1_node);
1215 of_node_put(lt9611->dsi0_node);
1216
1217 return ret;
1218}
1219
1220static void lt9611_remove(struct i2c_client *client)
1221{
1222 struct lt9611 *lt9611 = i2c_get_clientdata(client);
1223
1224 disable_irq(client->irq);
1225 lt9611_audio_exit(lt9611);
1226 drm_bridge_remove(<9611->bridge);
1227
1228 regulator_bulk_disable(ARRAY_SIZE(lt9611->supplies), lt9611->supplies);
1229
1230 of_node_put(lt9611->dsi1_node);
1231 of_node_put(lt9611->dsi0_node);
1232}
1233
1234static struct i2c_device_id lt9611_id[] = {
1235 { "lontium,lt9611", 0 },
1236 {}
1237};
1238MODULE_DEVICE_TABLE(i2c, lt9611_id);
1239
1240static const struct of_device_id lt9611_match_table[] = {
1241 { .compatible = "lontium,lt9611" },
1242 { }
1243};
1244MODULE_DEVICE_TABLE(of, lt9611_match_table);
1245
1246static struct i2c_driver lt9611_driver = {
1247 .driver = {
1248 .name = "lt9611",
1249 .of_match_table = lt9611_match_table,
1250 },
1251 .probe = lt9611_probe,
1252 .remove = lt9611_remove,
1253 .id_table = lt9611_id,
1254};
1255module_i2c_driver(lt9611_driver);
1256
1257MODULE_LICENSE("GPL v2");