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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_of.h>
23#include <drm/drm_print.h>
24#include <drm/drm_probe_helper.h>
25
26#define EDID_SEG_SIZE 256
27#define EDID_LEN 32
28#define EDID_LOOP 8
29#define KEY_DDC_ACCS_DONE 0x02
30#define DDC_NO_ACK 0x50
31
32#define LT9611_4LANES 0
33
34struct lt9611 {
35 struct device *dev;
36 struct drm_bridge bridge;
37 struct drm_bridge *next_bridge;
38
39 struct regmap *regmap;
40
41 struct device_node *dsi0_node;
42 struct device_node *dsi1_node;
43 struct mipi_dsi_device *dsi0;
44 struct mipi_dsi_device *dsi1;
45 struct platform_device *audio_pdev;
46
47 bool ac_mode;
48
49 struct gpio_desc *reset_gpio;
50 struct gpio_desc *enable_gpio;
51
52 bool power_on;
53 bool sleep;
54
55 struct regulator_bulk_data supplies[2];
56
57 struct i2c_client *client;
58
59 enum drm_connector_status status;
60
61 u8 edid_buf[EDID_SEG_SIZE];
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
87static struct lt9611 *bridge_to_lt9611(struct drm_bridge *bridge)
88{
89 return container_of(bridge, struct lt9611, bridge);
90}
91
92static int lt9611_mipi_input_analog(struct lt9611 *lt9611)
93{
94 const struct reg_sequence reg_cfg[] = {
95 { 0x8106, 0x40 }, /* port A rx current */
96 { 0x810a, 0xfe }, /* port A ldo voltage set */
97 { 0x810b, 0xbf }, /* enable port A lprx */
98 { 0x8111, 0x40 }, /* port B rx current */
99 { 0x8115, 0xfe }, /* port B ldo voltage set */
100 { 0x8116, 0xbf }, /* enable port B lprx */
101
102 { 0x811c, 0x03 }, /* PortA clk lane no-LP mode */
103 { 0x8120, 0x03 }, /* PortB clk lane with-LP mode */
104 };
105
106 return regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg));
107}
108
109static int lt9611_mipi_input_digital(struct lt9611 *lt9611,
110 const struct drm_display_mode *mode)
111{
112 struct reg_sequence reg_cfg[] = {
113 { 0x8300, LT9611_4LANES },
114 { 0x830a, 0x00 },
115 { 0x824f, 0x80 },
116 { 0x8250, 0x10 },
117 { 0x8302, 0x0a },
118 { 0x8306, 0x0a },
119 };
120
121 if (lt9611->dsi1_node)
122 reg_cfg[1].def = 0x03;
123
124 return regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg));
125}
126
127static void lt9611_mipi_video_setup(struct lt9611 *lt9611,
128 const struct drm_display_mode *mode)
129{
130 u32 h_total, hactive, hsync_len, hfront_porch, hsync_porch;
131 u32 v_total, vactive, vsync_len, vfront_porch, vsync_porch;
132
133 h_total = mode->htotal;
134 v_total = mode->vtotal;
135
136 hactive = mode->hdisplay;
137 hsync_len = mode->hsync_end - mode->hsync_start;
138 hfront_porch = mode->hsync_start - mode->hdisplay;
139 hsync_porch = mode->htotal - mode->hsync_start;
140
141 vactive = mode->vdisplay;
142 vsync_len = mode->vsync_end - mode->vsync_start;
143 vfront_porch = mode->vsync_start - mode->vdisplay;
144 vsync_porch = mode->vtotal - mode->vsync_start;
145
146 regmap_write(lt9611->regmap, 0x830d, (u8)(v_total / 256));
147 regmap_write(lt9611->regmap, 0x830e, (u8)(v_total % 256));
148
149 regmap_write(lt9611->regmap, 0x830f, (u8)(vactive / 256));
150 regmap_write(lt9611->regmap, 0x8310, (u8)(vactive % 256));
151
152 regmap_write(lt9611->regmap, 0x8311, (u8)(h_total / 256));
153 regmap_write(lt9611->regmap, 0x8312, (u8)(h_total % 256));
154
155 regmap_write(lt9611->regmap, 0x8313, (u8)(hactive / 256));
156 regmap_write(lt9611->regmap, 0x8314, (u8)(hactive % 256));
157
158 regmap_write(lt9611->regmap, 0x8315, (u8)(vsync_len % 256));
159 regmap_write(lt9611->regmap, 0x8316, (u8)(hsync_len % 256));
160
161 regmap_write(lt9611->regmap, 0x8317, (u8)(vfront_porch % 256));
162
163 regmap_write(lt9611->regmap, 0x8318, (u8)(vsync_porch % 256));
164
165 regmap_write(lt9611->regmap, 0x8319, (u8)(hfront_porch % 256));
166
167 regmap_write(lt9611->regmap, 0x831a, (u8)(hsync_porch / 256) |
168 ((hfront_porch / 256) << 4));
169 regmap_write(lt9611->regmap, 0x831b, (u8)(hsync_porch % 256));
170}
171
172static void lt9611_pcr_setup(struct lt9611 *lt9611, const struct drm_display_mode *mode, unsigned int postdiv)
173{
174 unsigned int pcr_m = mode->clock * 5 * postdiv / 27000;
175 const struct reg_sequence reg_cfg[] = {
176 { 0x830b, 0x01 },
177 { 0x830c, 0x10 },
178 { 0x8348, 0x00 },
179 { 0x8349, 0x81 },
180
181 /* stage 1 */
182 { 0x8321, 0x4a },
183 { 0x8324, 0x71 },
184 { 0x8325, 0x30 },
185 { 0x832a, 0x01 },
186
187 /* stage 2 */
188 { 0x834a, 0x40 },
189
190 /* MK limit */
191 { 0x832d, 0x38 },
192 { 0x8331, 0x08 },
193 };
194 u8 pol = 0x10;
195
196 if (mode->flags & DRM_MODE_FLAG_NHSYNC)
197 pol |= 0x2;
198 if (mode->flags & DRM_MODE_FLAG_NVSYNC)
199 pol |= 0x1;
200 regmap_write(lt9611->regmap, 0x831d, pol);
201
202 regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg));
203 if (lt9611->dsi1_node) {
204 unsigned int hact = mode->hdisplay;
205
206 hact >>= 2;
207 hact += 0x50;
208 hact = min(hact, 0x3e0U);
209 regmap_write(lt9611->regmap, 0x830b, hact / 256);
210 regmap_write(lt9611->regmap, 0x830c, hact % 256);
211 regmap_write(lt9611->regmap, 0x8348, hact / 256);
212 regmap_write(lt9611->regmap, 0x8349, hact % 256);
213 }
214
215 regmap_write(lt9611->regmap, 0x8326, pcr_m);
216
217 /* pcr rst */
218 regmap_write(lt9611->regmap, 0x8011, 0x5a);
219 regmap_write(lt9611->regmap, 0x8011, 0xfa);
220}
221
222static int lt9611_pll_setup(struct lt9611 *lt9611, const struct drm_display_mode *mode, unsigned int *postdiv)
223{
224 unsigned int pclk = mode->clock;
225 const struct reg_sequence reg_cfg[] = {
226 /* txpll init */
227 { 0x8123, 0x40 },
228 { 0x8124, 0x64 },
229 { 0x8125, 0x80 },
230 { 0x8126, 0x55 },
231 { 0x812c, 0x37 },
232 { 0x812f, 0x01 },
233 { 0x8126, 0x55 },
234 { 0x8127, 0x66 },
235 { 0x8128, 0x88 },
236 { 0x812a, 0x20 },
237 };
238
239 regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg));
240
241 if (pclk > 150000) {
242 regmap_write(lt9611->regmap, 0x812d, 0x88);
243 *postdiv = 1;
244 } else if (pclk > 70000) {
245 regmap_write(lt9611->regmap, 0x812d, 0x99);
246 *postdiv = 2;
247 } else {
248 regmap_write(lt9611->regmap, 0x812d, 0xaa);
249 *postdiv = 4;
250 }
251
252 /*
253 * first divide pclk by 2 first
254 * - write divide by 64k to 19:16 bits which means shift by 17
255 * - write divide by 256 to 15:8 bits which means shift by 9
256 * - write remainder to 7:0 bits, which means shift by 1
257 */
258 regmap_write(lt9611->regmap, 0x82e3, pclk >> 17); /* pclk[19:16] */
259 regmap_write(lt9611->regmap, 0x82e4, pclk >> 9); /* pclk[15:8] */
260 regmap_write(lt9611->regmap, 0x82e5, pclk >> 1); /* pclk[7:0] */
261
262 regmap_write(lt9611->regmap, 0x82de, 0x20);
263 regmap_write(lt9611->regmap, 0x82de, 0xe0);
264
265 regmap_write(lt9611->regmap, 0x8016, 0xf1);
266 regmap_write(lt9611->regmap, 0x8016, 0xf3);
267
268 return 0;
269}
270
271static int lt9611_read_video_check(struct lt9611 *lt9611, unsigned int reg)
272{
273 unsigned int temp, temp2;
274 int ret;
275
276 ret = regmap_read(lt9611->regmap, reg, &temp);
277 if (ret)
278 return ret;
279 temp <<= 8;
280 ret = regmap_read(lt9611->regmap, reg + 1, &temp2);
281 if (ret)
282 return ret;
283
284 return (temp + temp2);
285}
286
287static int lt9611_video_check(struct lt9611 *lt9611)
288{
289 u32 v_total, vactive, hactive_a, hactive_b, h_total_sysclk;
290 int temp;
291
292 /* top module video check */
293
294 /* vactive */
295 temp = lt9611_read_video_check(lt9611, 0x8282);
296 if (temp < 0)
297 goto end;
298 vactive = temp;
299
300 /* v_total */
301 temp = lt9611_read_video_check(lt9611, 0x826c);
302 if (temp < 0)
303 goto end;
304 v_total = temp;
305
306 /* h_total_sysclk */
307 temp = lt9611_read_video_check(lt9611, 0x8286);
308 if (temp < 0)
309 goto end;
310 h_total_sysclk = temp;
311
312 /* hactive_a */
313 temp = lt9611_read_video_check(lt9611, 0x8382);
314 if (temp < 0)
315 goto end;
316 hactive_a = temp / 3;
317
318 /* hactive_b */
319 temp = lt9611_read_video_check(lt9611, 0x8386);
320 if (temp < 0)
321 goto end;
322 hactive_b = temp / 3;
323
324 dev_info(lt9611->dev,
325 "video check: hactive_a=%d, hactive_b=%d, vactive=%d, v_total=%d, h_total_sysclk=%d\n",
326 hactive_a, hactive_b, vactive, v_total, h_total_sysclk);
327
328 return 0;
329
330end:
331 dev_err(lt9611->dev, "read video check error\n");
332 return temp;
333}
334
335static void lt9611_hdmi_set_infoframes(struct lt9611 *lt9611,
336 struct drm_connector *connector,
337 struct drm_display_mode *mode)
338{
339 union hdmi_infoframe infoframe;
340 ssize_t len;
341 u8 iframes = 0x0a; /* UD1 infoframe */
342 u8 buf[32];
343 int ret;
344 int i;
345
346 ret = drm_hdmi_avi_infoframe_from_display_mode(&infoframe.avi,
347 connector,
348 mode);
349 if (ret < 0)
350 goto out;
351
352 len = hdmi_infoframe_pack(&infoframe, buf, sizeof(buf));
353 if (len < 0)
354 goto out;
355
356 for (i = 0; i < len; i++)
357 regmap_write(lt9611->regmap, 0x8440 + i, buf[i]);
358
359 ret = drm_hdmi_vendor_infoframe_from_display_mode(&infoframe.vendor.hdmi,
360 connector,
361 mode);
362 if (ret < 0)
363 goto out;
364
365 len = hdmi_infoframe_pack(&infoframe, buf, sizeof(buf));
366 if (len < 0)
367 goto out;
368
369 for (i = 0; i < len; i++)
370 regmap_write(lt9611->regmap, 0x8474 + i, buf[i]);
371
372 iframes |= 0x20;
373
374out:
375 regmap_write(lt9611->regmap, 0x843d, iframes); /* UD1 infoframe */
376}
377
378static void lt9611_hdmi_tx_digital(struct lt9611 *lt9611, bool is_hdmi)
379{
380 if (is_hdmi)
381 regmap_write(lt9611->regmap, 0x82d6, 0x8c);
382 else
383 regmap_write(lt9611->regmap, 0x82d6, 0x0c);
384 regmap_write(lt9611->regmap, 0x82d7, 0x04);
385}
386
387static void lt9611_hdmi_tx_phy(struct lt9611 *lt9611)
388{
389 struct reg_sequence reg_cfg[] = {
390 { 0x8130, 0x6a },
391 { 0x8131, 0x44 }, /* HDMI DC mode */
392 { 0x8132, 0x4a },
393 { 0x8133, 0x0b },
394 { 0x8134, 0x00 },
395 { 0x8135, 0x00 },
396 { 0x8136, 0x00 },
397 { 0x8137, 0x44 },
398 { 0x813f, 0x0f },
399 { 0x8140, 0xa0 },
400 { 0x8141, 0xa0 },
401 { 0x8142, 0xa0 },
402 { 0x8143, 0xa0 },
403 { 0x8144, 0x0a },
404 };
405
406 /* HDMI AC mode */
407 if (lt9611->ac_mode)
408 reg_cfg[2].def = 0x73;
409
410 regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg));
411}
412
413static irqreturn_t lt9611_irq_thread_handler(int irq, void *dev_id)
414{
415 struct lt9611 *lt9611 = dev_id;
416 unsigned int irq_flag0 = 0;
417 unsigned int irq_flag3 = 0;
418
419 regmap_read(lt9611->regmap, 0x820f, &irq_flag3);
420 regmap_read(lt9611->regmap, 0x820c, &irq_flag0);
421
422 /* hpd changed low */
423 if (irq_flag3 & 0x80) {
424 dev_info(lt9611->dev, "hdmi cable disconnected\n");
425
426 regmap_write(lt9611->regmap, 0x8207, 0xbf);
427 regmap_write(lt9611->regmap, 0x8207, 0x3f);
428 }
429
430 /* hpd changed high */
431 if (irq_flag3 & 0x40) {
432 dev_info(lt9611->dev, "hdmi cable connected\n");
433
434 regmap_write(lt9611->regmap, 0x8207, 0x7f);
435 regmap_write(lt9611->regmap, 0x8207, 0x3f);
436 }
437
438 if (irq_flag3 & 0xc0 && lt9611->bridge.dev)
439 drm_kms_helper_hotplug_event(lt9611->bridge.dev);
440
441 /* video input changed */
442 if (irq_flag0 & 0x01) {
443 dev_info(lt9611->dev, "video input changed\n");
444 regmap_write(lt9611->regmap, 0x829e, 0xff);
445 regmap_write(lt9611->regmap, 0x829e, 0xf7);
446 regmap_write(lt9611->regmap, 0x8204, 0xff);
447 regmap_write(lt9611->regmap, 0x8204, 0xfe);
448 }
449
450 return IRQ_HANDLED;
451}
452
453static void lt9611_enable_hpd_interrupts(struct lt9611 *lt9611)
454{
455 unsigned int val;
456
457 regmap_read(lt9611->regmap, 0x8203, &val);
458
459 val &= ~0xc0;
460 regmap_write(lt9611->regmap, 0x8203, val);
461 regmap_write(lt9611->regmap, 0x8207, 0xff); /* clear */
462 regmap_write(lt9611->regmap, 0x8207, 0x3f);
463}
464
465static void lt9611_sleep_setup(struct lt9611 *lt9611)
466{
467 const struct reg_sequence sleep_setup[] = {
468 { 0x8024, 0x76 },
469 { 0x8023, 0x01 },
470 { 0x8157, 0x03 }, /* set addr pin as output */
471 { 0x8149, 0x0b },
472
473 { 0x8102, 0x48 }, /* MIPI Rx power down */
474 { 0x8123, 0x80 },
475 { 0x8130, 0x00 },
476 { 0x8011, 0x0a },
477 };
478
479 regmap_multi_reg_write(lt9611->regmap,
480 sleep_setup, ARRAY_SIZE(sleep_setup));
481 lt9611->sleep = true;
482}
483
484static int lt9611_power_on(struct lt9611 *lt9611)
485{
486 int ret;
487 const struct reg_sequence seq[] = {
488 /* LT9611_System_Init */
489 { 0x8101, 0x18 }, /* sel xtal clock */
490
491 /* timer for frequency meter */
492 { 0x821b, 0x69 }, /* timer 2 */
493 { 0x821c, 0x78 },
494 { 0x82cb, 0x69 }, /* timer 1 */
495 { 0x82cc, 0x78 },
496
497 /* irq init */
498 { 0x8251, 0x01 },
499 { 0x8258, 0x0a }, /* hpd irq */
500 { 0x8259, 0x80 }, /* hpd debounce width */
501 { 0x829e, 0xf7 }, /* video check irq */
502
503 /* power consumption for work */
504 { 0x8004, 0xf0 },
505 { 0x8006, 0xf0 },
506 { 0x800a, 0x80 },
507 { 0x800b, 0x40 },
508 { 0x800d, 0xef },
509 { 0x8011, 0xfa },
510 };
511
512 if (lt9611->power_on)
513 return 0;
514
515 ret = regmap_multi_reg_write(lt9611->regmap, seq, ARRAY_SIZE(seq));
516 if (!ret)
517 lt9611->power_on = true;
518
519 return ret;
520}
521
522static int lt9611_power_off(struct lt9611 *lt9611)
523{
524 int ret;
525
526 ret = regmap_write(lt9611->regmap, 0x8130, 0x6a);
527 if (!ret)
528 lt9611->power_on = false;
529
530 return ret;
531}
532
533static void lt9611_reset(struct lt9611 *lt9611)
534{
535 gpiod_set_value_cansleep(lt9611->reset_gpio, 1);
536 msleep(20);
537
538 gpiod_set_value_cansleep(lt9611->reset_gpio, 0);
539 msleep(20);
540
541 gpiod_set_value_cansleep(lt9611->reset_gpio, 1);
542 msleep(100);
543}
544
545static void lt9611_assert_5v(struct lt9611 *lt9611)
546{
547 if (!lt9611->enable_gpio)
548 return;
549
550 gpiod_set_value_cansleep(lt9611->enable_gpio, 1);
551 msleep(20);
552}
553
554static int lt9611_regulator_init(struct lt9611 *lt9611)
555{
556 int ret;
557
558 lt9611->supplies[0].supply = "vdd";
559 lt9611->supplies[1].supply = "vcc";
560
561 ret = devm_regulator_bulk_get(lt9611->dev, 2, lt9611->supplies);
562 if (ret < 0)
563 return ret;
564
565 return regulator_set_load(lt9611->supplies[0].consumer, 300000);
566}
567
568static int lt9611_regulator_enable(struct lt9611 *lt9611)
569{
570 int ret;
571
572 ret = regulator_enable(lt9611->supplies[0].consumer);
573 if (ret < 0)
574 return ret;
575
576 usleep_range(1000, 10000);
577
578 ret = regulator_enable(lt9611->supplies[1].consumer);
579 if (ret < 0) {
580 regulator_disable(lt9611->supplies[0].consumer);
581 return ret;
582 }
583
584 return 0;
585}
586
587static enum drm_connector_status lt9611_bridge_detect(struct drm_bridge *bridge)
588{
589 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
590 unsigned int reg_val = 0;
591 int connected = 0;
592
593 regmap_read(lt9611->regmap, 0x825e, ®_val);
594 connected = (reg_val & (BIT(2) | BIT(0)));
595
596 lt9611->status = connected ? connector_status_connected :
597 connector_status_disconnected;
598
599 return lt9611->status;
600}
601
602static int lt9611_read_edid(struct lt9611 *lt9611)
603{
604 unsigned int temp;
605 int ret = 0;
606 int i, j;
607
608 /* memset to clear old buffer, if any */
609 memset(lt9611->edid_buf, 0, sizeof(lt9611->edid_buf));
610
611 regmap_write(lt9611->regmap, 0x8503, 0xc9);
612
613 /* 0xA0 is EDID device address */
614 regmap_write(lt9611->regmap, 0x8504, 0xa0);
615 /* 0x00 is EDID offset address */
616 regmap_write(lt9611->regmap, 0x8505, 0x00);
617
618 /* length for read */
619 regmap_write(lt9611->regmap, 0x8506, EDID_LEN);
620 regmap_write(lt9611->regmap, 0x8514, 0x7f);
621
622 for (i = 0; i < EDID_LOOP; i++) {
623 /* offset address */
624 regmap_write(lt9611->regmap, 0x8505, i * EDID_LEN);
625 regmap_write(lt9611->regmap, 0x8507, 0x36);
626 regmap_write(lt9611->regmap, 0x8507, 0x31);
627 regmap_write(lt9611->regmap, 0x8507, 0x37);
628 usleep_range(5000, 10000);
629
630 regmap_read(lt9611->regmap, 0x8540, &temp);
631
632 if (temp & KEY_DDC_ACCS_DONE) {
633 for (j = 0; j < EDID_LEN; j++) {
634 regmap_read(lt9611->regmap, 0x8583, &temp);
635 lt9611->edid_buf[i * EDID_LEN + j] = temp;
636 }
637
638 } else if (temp & DDC_NO_ACK) { /* DDC No Ack or Abitration lost */
639 dev_err(lt9611->dev, "read edid failed: no ack\n");
640 ret = -EIO;
641 goto end;
642
643 } else {
644 dev_err(lt9611->dev, "read edid failed: access not done\n");
645 ret = -EIO;
646 goto end;
647 }
648 }
649
650end:
651 regmap_write(lt9611->regmap, 0x8507, 0x1f);
652 return ret;
653}
654
655static int
656lt9611_get_edid_block(void *data, u8 *buf, unsigned int block, size_t len)
657{
658 struct lt9611 *lt9611 = data;
659 int ret;
660
661 if (len > 128)
662 return -EINVAL;
663
664 /* supports up to 1 extension block */
665 /* TODO: add support for more extension blocks */
666 if (block > 1)
667 return -EINVAL;
668
669 if (block == 0) {
670 ret = lt9611_read_edid(lt9611);
671 if (ret) {
672 dev_err(lt9611->dev, "edid read failed\n");
673 return ret;
674 }
675 }
676
677 block %= 2;
678 memcpy(buf, lt9611->edid_buf + (block * 128), len);
679
680 return 0;
681}
682
683/* bridge funcs */
684static void
685lt9611_bridge_atomic_enable(struct drm_bridge *bridge,
686 struct drm_bridge_state *old_bridge_state)
687{
688 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
689 struct drm_atomic_state *state = old_bridge_state->base.state;
690 struct drm_connector *connector;
691 struct drm_connector_state *conn_state;
692 struct drm_crtc_state *crtc_state;
693 struct drm_display_mode *mode;
694 unsigned int postdiv;
695
696 connector = drm_atomic_get_new_connector_for_encoder(state, bridge->encoder);
697 if (WARN_ON(!connector))
698 return;
699
700 conn_state = drm_atomic_get_new_connector_state(state, connector);
701 if (WARN_ON(!conn_state))
702 return;
703
704 crtc_state = drm_atomic_get_new_crtc_state(state, conn_state->crtc);
705 if (WARN_ON(!crtc_state))
706 return;
707
708 mode = &crtc_state->adjusted_mode;
709
710 lt9611_mipi_input_digital(lt9611, mode);
711 lt9611_pll_setup(lt9611, mode, &postdiv);
712 lt9611_mipi_video_setup(lt9611, mode);
713 lt9611_pcr_setup(lt9611, mode, postdiv);
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_set_infoframes(lt9611, connector, mode);
722 lt9611_hdmi_tx_digital(lt9611, connector->display_info.is_hdmi);
723 lt9611_hdmi_tx_phy(lt9611);
724
725 msleep(500);
726
727 lt9611_video_check(lt9611);
728
729 /* Enable HDMI output */
730 regmap_write(lt9611->regmap, 0x8130, 0xea);
731}
732
733static void
734lt9611_bridge_atomic_disable(struct drm_bridge *bridge,
735 struct drm_bridge_state *old_bridge_state)
736{
737 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
738 int ret;
739
740 /* Disable HDMI output */
741 ret = regmap_write(lt9611->regmap, 0x8130, 0x6a);
742 if (ret) {
743 dev_err(lt9611->dev, "video on failed\n");
744 return;
745 }
746
747 if (lt9611_power_off(lt9611)) {
748 dev_err(lt9611->dev, "power on failed\n");
749 return;
750 }
751}
752
753static struct mipi_dsi_device *lt9611_attach_dsi(struct lt9611 *lt9611,
754 struct device_node *dsi_node)
755{
756 const struct mipi_dsi_device_info info = { "lt9611", 0, lt9611->dev->of_node};
757 struct mipi_dsi_device *dsi;
758 struct mipi_dsi_host *host;
759 struct device *dev = lt9611->dev;
760 int ret;
761
762 host = of_find_mipi_dsi_host_by_node(dsi_node);
763 if (!host) {
764 dev_err(lt9611->dev, "failed to find dsi host\n");
765 return ERR_PTR(-EPROBE_DEFER);
766 }
767
768 dsi = devm_mipi_dsi_device_register_full(dev, host, &info);
769 if (IS_ERR(dsi)) {
770 dev_err(lt9611->dev, "failed to create dsi device\n");
771 return dsi;
772 }
773
774 dsi->lanes = 4;
775 dsi->format = MIPI_DSI_FMT_RGB888;
776 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
777 MIPI_DSI_MODE_VIDEO_HSE;
778
779 ret = devm_mipi_dsi_attach(dev, dsi);
780 if (ret < 0) {
781 dev_err(dev, "failed to attach dsi to host\n");
782 return ERR_PTR(ret);
783 }
784
785 return dsi;
786}
787
788static int lt9611_bridge_attach(struct drm_bridge *bridge,
789 enum drm_bridge_attach_flags flags)
790{
791 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
792
793 return drm_bridge_attach(bridge->encoder, lt9611->next_bridge,
794 bridge, flags);
795}
796
797static enum drm_mode_status lt9611_bridge_mode_valid(struct drm_bridge *bridge,
798 const struct drm_display_info *info,
799 const struct drm_display_mode *mode)
800{
801 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
802
803 if (mode->hdisplay > 3840)
804 return MODE_BAD_HVALUE;
805
806 if (mode->vdisplay > 2160)
807 return MODE_BAD_VVALUE;
808
809 if (mode->hdisplay == 3840 &&
810 mode->vdisplay == 2160 &&
811 drm_mode_vrefresh(mode) > 30)
812 return MODE_CLOCK_HIGH;
813
814 if (mode->hdisplay > 2000 && !lt9611->dsi1_node)
815 return MODE_PANEL;
816 else
817 return MODE_OK;
818}
819
820static void lt9611_bridge_atomic_pre_enable(struct drm_bridge *bridge,
821 struct drm_bridge_state *old_bridge_state)
822{
823 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
824 static const struct reg_sequence reg_cfg[] = {
825 { 0x8102, 0x12 },
826 { 0x8123, 0x40 },
827 { 0x8130, 0xea },
828 { 0x8011, 0xfa },
829 };
830
831 if (!lt9611->sleep)
832 return;
833
834 regmap_multi_reg_write(lt9611->regmap,
835 reg_cfg, ARRAY_SIZE(reg_cfg));
836
837 lt9611->sleep = false;
838}
839
840static void
841lt9611_bridge_atomic_post_disable(struct drm_bridge *bridge,
842 struct drm_bridge_state *old_bridge_state)
843{
844 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
845
846 lt9611_sleep_setup(lt9611);
847}
848
849static struct edid *lt9611_bridge_get_edid(struct drm_bridge *bridge,
850 struct drm_connector *connector)
851{
852 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
853
854 lt9611_power_on(lt9611);
855 return drm_do_get_edid(connector, lt9611_get_edid_block, lt9611);
856}
857
858static void lt9611_bridge_hpd_enable(struct drm_bridge *bridge)
859{
860 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
861
862 lt9611_enable_hpd_interrupts(lt9611);
863}
864
865#define MAX_INPUT_SEL_FORMATS 1
866
867static u32 *
868lt9611_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
869 struct drm_bridge_state *bridge_state,
870 struct drm_crtc_state *crtc_state,
871 struct drm_connector_state *conn_state,
872 u32 output_fmt,
873 unsigned int *num_input_fmts)
874{
875 u32 *input_fmts;
876
877 *num_input_fmts = 0;
878
879 input_fmts = kcalloc(MAX_INPUT_SEL_FORMATS, sizeof(*input_fmts),
880 GFP_KERNEL);
881 if (!input_fmts)
882 return NULL;
883
884 /* This is the DSI-end bus format */
885 input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24;
886 *num_input_fmts = 1;
887
888 return input_fmts;
889}
890
891static const struct drm_bridge_funcs lt9611_bridge_funcs = {
892 .attach = lt9611_bridge_attach,
893 .mode_valid = lt9611_bridge_mode_valid,
894 .detect = lt9611_bridge_detect,
895 .get_edid = lt9611_bridge_get_edid,
896 .hpd_enable = lt9611_bridge_hpd_enable,
897
898 .atomic_pre_enable = lt9611_bridge_atomic_pre_enable,
899 .atomic_enable = lt9611_bridge_atomic_enable,
900 .atomic_disable = lt9611_bridge_atomic_disable,
901 .atomic_post_disable = lt9611_bridge_atomic_post_disable,
902 .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
903 .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
904 .atomic_reset = drm_atomic_helper_bridge_reset,
905 .atomic_get_input_bus_fmts = lt9611_atomic_get_input_bus_fmts,
906};
907
908static int lt9611_parse_dt(struct device *dev,
909 struct lt9611 *lt9611)
910{
911 lt9611->dsi0_node = of_graph_get_remote_node(dev->of_node, 0, -1);
912 if (!lt9611->dsi0_node) {
913 dev_err(lt9611->dev, "failed to get remote node for primary dsi\n");
914 return -ENODEV;
915 }
916
917 lt9611->dsi1_node = of_graph_get_remote_node(dev->of_node, 1, -1);
918
919 lt9611->ac_mode = of_property_read_bool(dev->of_node, "lt,ac-mode");
920
921 return drm_of_find_panel_or_bridge(dev->of_node, 2, -1, NULL, <9611->next_bridge);
922}
923
924static int lt9611_gpio_init(struct lt9611 *lt9611)
925{
926 struct device *dev = lt9611->dev;
927
928 lt9611->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
929 if (IS_ERR(lt9611->reset_gpio)) {
930 dev_err(dev, "failed to acquire reset gpio\n");
931 return PTR_ERR(lt9611->reset_gpio);
932 }
933
934 lt9611->enable_gpio = devm_gpiod_get_optional(dev, "enable",
935 GPIOD_OUT_LOW);
936 if (IS_ERR(lt9611->enable_gpio)) {
937 dev_err(dev, "failed to acquire enable gpio\n");
938 return PTR_ERR(lt9611->enable_gpio);
939 }
940
941 return 0;
942}
943
944static int lt9611_read_device_rev(struct lt9611 *lt9611)
945{
946 unsigned int rev;
947 int ret;
948
949 regmap_write(lt9611->regmap, 0x80ee, 0x01);
950 ret = regmap_read(lt9611->regmap, 0x8002, &rev);
951 if (ret)
952 dev_err(lt9611->dev, "failed to read revision: %d\n", ret);
953 else
954 dev_info(lt9611->dev, "LT9611 revision: 0x%x\n", rev);
955
956 return ret;
957}
958
959static int lt9611_hdmi_hw_params(struct device *dev, void *data,
960 struct hdmi_codec_daifmt *fmt,
961 struct hdmi_codec_params *hparms)
962{
963 struct lt9611 *lt9611 = data;
964
965 if (hparms->sample_rate == 48000)
966 regmap_write(lt9611->regmap, 0x840f, 0x2b);
967 else if (hparms->sample_rate == 96000)
968 regmap_write(lt9611->regmap, 0x840f, 0xab);
969 else
970 return -EINVAL;
971
972 regmap_write(lt9611->regmap, 0x8435, 0x00);
973 regmap_write(lt9611->regmap, 0x8436, 0x18);
974 regmap_write(lt9611->regmap, 0x8437, 0x00);
975
976 return 0;
977}
978
979static int lt9611_audio_startup(struct device *dev, void *data)
980{
981 struct lt9611 *lt9611 = data;
982
983 regmap_write(lt9611->regmap, 0x82d6, 0x8c);
984 regmap_write(lt9611->regmap, 0x82d7, 0x04);
985
986 regmap_write(lt9611->regmap, 0x8406, 0x08);
987 regmap_write(lt9611->regmap, 0x8407, 0x10);
988
989 regmap_write(lt9611->regmap, 0x8434, 0xd5);
990
991 return 0;
992}
993
994static void lt9611_audio_shutdown(struct device *dev, void *data)
995{
996 struct lt9611 *lt9611 = data;
997
998 regmap_write(lt9611->regmap, 0x8406, 0x00);
999 regmap_write(lt9611->regmap, 0x8407, 0x00);
1000}
1001
1002static int lt9611_hdmi_i2s_get_dai_id(struct snd_soc_component *component,
1003 struct device_node *endpoint)
1004{
1005 struct of_endpoint of_ep;
1006 int ret;
1007
1008 ret = of_graph_parse_endpoint(endpoint, &of_ep);
1009 if (ret < 0)
1010 return ret;
1011
1012 /*
1013 * HDMI sound should be located as reg = <2>
1014 * Then, it is sound port 0
1015 */
1016 if (of_ep.port == 2)
1017 return 0;
1018
1019 return -EINVAL;
1020}
1021
1022static const struct hdmi_codec_ops lt9611_codec_ops = {
1023 .hw_params = lt9611_hdmi_hw_params,
1024 .audio_shutdown = lt9611_audio_shutdown,
1025 .audio_startup = lt9611_audio_startup,
1026 .get_dai_id = lt9611_hdmi_i2s_get_dai_id,
1027};
1028
1029static struct hdmi_codec_pdata codec_data = {
1030 .ops = <9611_codec_ops,
1031 .max_i2s_channels = 8,
1032 .i2s = 1,
1033};
1034
1035static int lt9611_audio_init(struct device *dev, struct lt9611 *lt9611)
1036{
1037 codec_data.data = lt9611;
1038 lt9611->audio_pdev =
1039 platform_device_register_data(dev, HDMI_CODEC_DRV_NAME,
1040 PLATFORM_DEVID_AUTO,
1041 &codec_data, sizeof(codec_data));
1042
1043 return PTR_ERR_OR_ZERO(lt9611->audio_pdev);
1044}
1045
1046static void lt9611_audio_exit(struct lt9611 *lt9611)
1047{
1048 if (lt9611->audio_pdev) {
1049 platform_device_unregister(lt9611->audio_pdev);
1050 lt9611->audio_pdev = NULL;
1051 }
1052}
1053
1054static int lt9611_probe(struct i2c_client *client)
1055{
1056 struct lt9611 *lt9611;
1057 struct device *dev = &client->dev;
1058 int ret;
1059
1060 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
1061 dev_err(dev, "device doesn't support I2C\n");
1062 return -ENODEV;
1063 }
1064
1065 lt9611 = devm_kzalloc(dev, sizeof(*lt9611), GFP_KERNEL);
1066 if (!lt9611)
1067 return -ENOMEM;
1068
1069 lt9611->dev = dev;
1070 lt9611->client = client;
1071 lt9611->sleep = false;
1072
1073 lt9611->regmap = devm_regmap_init_i2c(client, <9611_regmap_config);
1074 if (IS_ERR(lt9611->regmap)) {
1075 dev_err(lt9611->dev, "regmap i2c init failed\n");
1076 return PTR_ERR(lt9611->regmap);
1077 }
1078
1079 ret = lt9611_parse_dt(dev, lt9611);
1080 if (ret) {
1081 dev_err(dev, "failed to parse device tree\n");
1082 return ret;
1083 }
1084
1085 ret = lt9611_gpio_init(lt9611);
1086 if (ret < 0)
1087 goto err_of_put;
1088
1089 ret = lt9611_regulator_init(lt9611);
1090 if (ret < 0)
1091 goto err_of_put;
1092
1093 lt9611_assert_5v(lt9611);
1094
1095 ret = lt9611_regulator_enable(lt9611);
1096 if (ret)
1097 goto err_of_put;
1098
1099 lt9611_reset(lt9611);
1100
1101 ret = lt9611_read_device_rev(lt9611);
1102 if (ret) {
1103 dev_err(dev, "failed to read chip rev\n");
1104 goto err_disable_regulators;
1105 }
1106
1107 ret = devm_request_threaded_irq(dev, client->irq, NULL,
1108 lt9611_irq_thread_handler,
1109 IRQF_ONESHOT, "lt9611", lt9611);
1110 if (ret) {
1111 dev_err(dev, "failed to request irq\n");
1112 goto err_disable_regulators;
1113 }
1114
1115 i2c_set_clientdata(client, lt9611);
1116
1117 lt9611->bridge.funcs = <9611_bridge_funcs;
1118 lt9611->bridge.of_node = client->dev.of_node;
1119 lt9611->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID |
1120 DRM_BRIDGE_OP_HPD | DRM_BRIDGE_OP_MODES;
1121 lt9611->bridge.type = DRM_MODE_CONNECTOR_HDMIA;
1122
1123 drm_bridge_add(<9611->bridge);
1124
1125 /* Attach primary DSI */
1126 lt9611->dsi0 = lt9611_attach_dsi(lt9611, lt9611->dsi0_node);
1127 if (IS_ERR(lt9611->dsi0)) {
1128 ret = PTR_ERR(lt9611->dsi0);
1129 goto err_remove_bridge;
1130 }
1131
1132 /* Attach secondary DSI, if specified */
1133 if (lt9611->dsi1_node) {
1134 lt9611->dsi1 = lt9611_attach_dsi(lt9611, lt9611->dsi1_node);
1135 if (IS_ERR(lt9611->dsi1)) {
1136 ret = PTR_ERR(lt9611->dsi1);
1137 goto err_remove_bridge;
1138 }
1139 }
1140
1141 lt9611_enable_hpd_interrupts(lt9611);
1142
1143 ret = lt9611_audio_init(dev, lt9611);
1144 if (ret)
1145 goto err_remove_bridge;
1146
1147 return 0;
1148
1149err_remove_bridge:
1150 drm_bridge_remove(<9611->bridge);
1151
1152err_disable_regulators:
1153 regulator_bulk_disable(ARRAY_SIZE(lt9611->supplies), lt9611->supplies);
1154
1155err_of_put:
1156 of_node_put(lt9611->dsi1_node);
1157 of_node_put(lt9611->dsi0_node);
1158
1159 return ret;
1160}
1161
1162static void lt9611_remove(struct i2c_client *client)
1163{
1164 struct lt9611 *lt9611 = i2c_get_clientdata(client);
1165
1166 disable_irq(client->irq);
1167 lt9611_audio_exit(lt9611);
1168 drm_bridge_remove(<9611->bridge);
1169
1170 regulator_bulk_disable(ARRAY_SIZE(lt9611->supplies), lt9611->supplies);
1171
1172 of_node_put(lt9611->dsi1_node);
1173 of_node_put(lt9611->dsi0_node);
1174}
1175
1176static struct i2c_device_id lt9611_id[] = {
1177 { "lontium,lt9611", 0 },
1178 {}
1179};
1180MODULE_DEVICE_TABLE(i2c, lt9611_id);
1181
1182static const struct of_device_id lt9611_match_table[] = {
1183 { .compatible = "lontium,lt9611" },
1184 { }
1185};
1186MODULE_DEVICE_TABLE(of, lt9611_match_table);
1187
1188static struct i2c_driver lt9611_driver = {
1189 .driver = {
1190 .name = "lt9611",
1191 .of_match_table = lt9611_match_table,
1192 },
1193 .probe = lt9611_probe,
1194 .remove = lt9611_remove,
1195 .id_table = lt9611_id,
1196};
1197module_i2c_driver(lt9611_driver);
1198
1199MODULE_LICENSE("GPL v2");