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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_edid.h>
22#include <drm/drm_mipi_dsi.h>
23#include <drm/drm_of.h>
24#include <drm/drm_print.h>
25#include <drm/drm_probe_helper.h>
26
27#define EDID_SEG_SIZE 256
28#define EDID_LEN 32
29#define EDID_LOOP 8
30#define KEY_DDC_ACCS_DONE 0x02
31#define DDC_NO_ACK 0x50
32
33#define LT9611_4LANES 0
34
35struct lt9611 {
36 struct device *dev;
37 struct drm_bridge bridge;
38 struct drm_bridge *next_bridge;
39
40 struct regmap *regmap;
41
42 struct device_node *dsi0_node;
43 struct device_node *dsi1_node;
44 struct mipi_dsi_device *dsi0;
45 struct mipi_dsi_device *dsi1;
46 struct platform_device *audio_pdev;
47
48 bool ac_mode;
49
50 struct gpio_desc *reset_gpio;
51 struct gpio_desc *enable_gpio;
52
53 bool power_on;
54 bool sleep;
55
56 struct regulator_bulk_data supplies[2];
57
58 struct i2c_client *client;
59
60 enum drm_connector_status status;
61
62 u8 edid_buf[EDID_SEG_SIZE];
63};
64
65#define LT9611_PAGE_CONTROL 0xff
66
67static const struct regmap_range_cfg lt9611_ranges[] = {
68 {
69 .name = "register_range",
70 .range_min = 0,
71 .range_max = 0x85ff,
72 .selector_reg = LT9611_PAGE_CONTROL,
73 .selector_mask = 0xff,
74 .selector_shift = 0,
75 .window_start = 0,
76 .window_len = 0x100,
77 },
78};
79
80static const struct regmap_config lt9611_regmap_config = {
81 .reg_bits = 8,
82 .val_bits = 8,
83 .max_register = 0xffff,
84 .ranges = lt9611_ranges,
85 .num_ranges = ARRAY_SIZE(lt9611_ranges),
86};
87
88static struct lt9611 *bridge_to_lt9611(struct drm_bridge *bridge)
89{
90 return container_of(bridge, struct lt9611, bridge);
91}
92
93static int lt9611_mipi_input_analog(struct lt9611 *lt9611)
94{
95 const struct reg_sequence reg_cfg[] = {
96 { 0x8106, 0x40 }, /* port A rx current */
97 { 0x810a, 0xfe }, /* port A ldo voltage set */
98 { 0x810b, 0xbf }, /* enable port A lprx */
99 { 0x8111, 0x40 }, /* port B rx current */
100 { 0x8115, 0xfe }, /* port B ldo voltage set */
101 { 0x8116, 0xbf }, /* enable port B lprx */
102
103 { 0x811c, 0x03 }, /* PortA clk lane no-LP mode */
104 { 0x8120, 0x03 }, /* PortB clk lane with-LP mode */
105 };
106
107 return regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg));
108}
109
110static int lt9611_mipi_input_digital(struct lt9611 *lt9611,
111 const struct drm_display_mode *mode)
112{
113 struct reg_sequence reg_cfg[] = {
114 { 0x8300, LT9611_4LANES },
115 { 0x830a, 0x00 },
116 { 0x824f, 0x80 },
117 { 0x8250, 0x10 },
118 { 0x8302, 0x0a },
119 { 0x8306, 0x0a },
120 };
121
122 if (lt9611->dsi1_node)
123 reg_cfg[1].def = 0x03;
124
125 return regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg));
126}
127
128static void lt9611_mipi_video_setup(struct lt9611 *lt9611,
129 const struct drm_display_mode *mode)
130{
131 u32 h_total, hactive, hsync_len, hfront_porch, hsync_porch;
132 u32 v_total, vactive, vsync_len, vfront_porch, vsync_porch;
133
134 h_total = mode->htotal;
135 v_total = mode->vtotal;
136
137 hactive = mode->hdisplay;
138 hsync_len = mode->hsync_end - mode->hsync_start;
139 hfront_porch = mode->hsync_start - mode->hdisplay;
140 hsync_porch = mode->htotal - mode->hsync_start;
141
142 vactive = mode->vdisplay;
143 vsync_len = mode->vsync_end - mode->vsync_start;
144 vfront_porch = mode->vsync_start - mode->vdisplay;
145 vsync_porch = mode->vtotal - mode->vsync_start;
146
147 regmap_write(lt9611->regmap, 0x830d, (u8)(v_total / 256));
148 regmap_write(lt9611->regmap, 0x830e, (u8)(v_total % 256));
149
150 regmap_write(lt9611->regmap, 0x830f, (u8)(vactive / 256));
151 regmap_write(lt9611->regmap, 0x8310, (u8)(vactive % 256));
152
153 regmap_write(lt9611->regmap, 0x8311, (u8)(h_total / 256));
154 regmap_write(lt9611->regmap, 0x8312, (u8)(h_total % 256));
155
156 regmap_write(lt9611->regmap, 0x8313, (u8)(hactive / 256));
157 regmap_write(lt9611->regmap, 0x8314, (u8)(hactive % 256));
158
159 regmap_write(lt9611->regmap, 0x8315, (u8)(vsync_len % 256));
160 regmap_write(lt9611->regmap, 0x8316, (u8)(hsync_len % 256));
161
162 regmap_write(lt9611->regmap, 0x8317, (u8)(vfront_porch % 256));
163
164 regmap_write(lt9611->regmap, 0x8318, (u8)(vsync_porch % 256));
165
166 regmap_write(lt9611->regmap, 0x8319, (u8)(hfront_porch % 256));
167
168 regmap_write(lt9611->regmap, 0x831a, (u8)(hsync_porch / 256) |
169 ((hfront_porch / 256) << 4));
170 regmap_write(lt9611->regmap, 0x831b, (u8)(hsync_porch % 256));
171}
172
173static void lt9611_pcr_setup(struct lt9611 *lt9611, const struct drm_display_mode *mode, unsigned int postdiv)
174{
175 unsigned int pcr_m = mode->clock * 5 * postdiv / 27000;
176 const struct reg_sequence reg_cfg[] = {
177 { 0x830b, 0x01 },
178 { 0x830c, 0x10 },
179 { 0x8348, 0x00 },
180 { 0x8349, 0x81 },
181
182 /* stage 1 */
183 { 0x8321, 0x4a },
184 { 0x8324, 0x71 },
185 { 0x8325, 0x30 },
186 { 0x832a, 0x01 },
187
188 /* stage 2 */
189 { 0x834a, 0x40 },
190
191 /* MK limit */
192 { 0x832d, 0x38 },
193 { 0x8331, 0x08 },
194 };
195 u8 pol = 0x10;
196
197 if (mode->flags & DRM_MODE_FLAG_NHSYNC)
198 pol |= 0x2;
199 if (mode->flags & DRM_MODE_FLAG_NVSYNC)
200 pol |= 0x1;
201 regmap_write(lt9611->regmap, 0x831d, pol);
202
203 regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg));
204 if (lt9611->dsi1_node) {
205 unsigned int hact = mode->hdisplay;
206
207 hact >>= 2;
208 hact += 0x50;
209 hact = min(hact, 0x3e0U);
210 regmap_write(lt9611->regmap, 0x830b, hact / 256);
211 regmap_write(lt9611->regmap, 0x830c, hact % 256);
212 regmap_write(lt9611->regmap, 0x8348, hact / 256);
213 regmap_write(lt9611->regmap, 0x8349, hact % 256);
214 }
215
216 regmap_write(lt9611->regmap, 0x8326, pcr_m);
217
218 /* pcr rst */
219 regmap_write(lt9611->regmap, 0x8011, 0x5a);
220 regmap_write(lt9611->regmap, 0x8011, 0xfa);
221}
222
223static int lt9611_pll_setup(struct lt9611 *lt9611, const struct drm_display_mode *mode, unsigned int *postdiv)
224{
225 unsigned int pclk = mode->clock;
226 const struct reg_sequence reg_cfg[] = {
227 /* txpll init */
228 { 0x8123, 0x40 },
229 { 0x8124, 0x64 },
230 { 0x8125, 0x80 },
231 { 0x8126, 0x55 },
232 { 0x812c, 0x37 },
233 { 0x812f, 0x01 },
234 { 0x8126, 0x55 },
235 { 0x8127, 0x66 },
236 { 0x8128, 0x88 },
237 { 0x812a, 0x20 },
238 };
239
240 regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg));
241
242 if (pclk > 150000) {
243 regmap_write(lt9611->regmap, 0x812d, 0x88);
244 *postdiv = 1;
245 } else if (pclk > 70000) {
246 regmap_write(lt9611->regmap, 0x812d, 0x99);
247 *postdiv = 2;
248 } else {
249 regmap_write(lt9611->regmap, 0x812d, 0xaa);
250 *postdiv = 4;
251 }
252
253 /*
254 * first divide pclk by 2 first
255 * - write divide by 64k to 19:16 bits which means shift by 17
256 * - write divide by 256 to 15:8 bits which means shift by 9
257 * - write remainder to 7:0 bits, which means shift by 1
258 */
259 regmap_write(lt9611->regmap, 0x82e3, pclk >> 17); /* pclk[19:16] */
260 regmap_write(lt9611->regmap, 0x82e4, pclk >> 9); /* pclk[15:8] */
261 regmap_write(lt9611->regmap, 0x82e5, pclk >> 1); /* pclk[7:0] */
262
263 regmap_write(lt9611->regmap, 0x82de, 0x20);
264 regmap_write(lt9611->regmap, 0x82de, 0xe0);
265
266 regmap_write(lt9611->regmap, 0x8016, 0xf1);
267 regmap_write(lt9611->regmap, 0x8016, 0xf3);
268
269 return 0;
270}
271
272static int lt9611_read_video_check(struct lt9611 *lt9611, unsigned int reg)
273{
274 unsigned int temp, temp2;
275 int ret;
276
277 ret = regmap_read(lt9611->regmap, reg, &temp);
278 if (ret)
279 return ret;
280 temp <<= 8;
281 ret = regmap_read(lt9611->regmap, reg + 1, &temp2);
282 if (ret)
283 return ret;
284
285 return (temp + temp2);
286}
287
288static int lt9611_video_check(struct lt9611 *lt9611)
289{
290 u32 v_total, vactive, hactive_a, hactive_b, h_total_sysclk;
291 int temp;
292
293 /* top module video check */
294
295 /* vactive */
296 temp = lt9611_read_video_check(lt9611, 0x8282);
297 if (temp < 0)
298 goto end;
299 vactive = temp;
300
301 /* v_total */
302 temp = lt9611_read_video_check(lt9611, 0x826c);
303 if (temp < 0)
304 goto end;
305 v_total = temp;
306
307 /* h_total_sysclk */
308 temp = lt9611_read_video_check(lt9611, 0x8286);
309 if (temp < 0)
310 goto end;
311 h_total_sysclk = temp;
312
313 /* hactive_a */
314 temp = lt9611_read_video_check(lt9611, 0x8382);
315 if (temp < 0)
316 goto end;
317 hactive_a = temp / 3;
318
319 /* hactive_b */
320 temp = lt9611_read_video_check(lt9611, 0x8386);
321 if (temp < 0)
322 goto end;
323 hactive_b = temp / 3;
324
325 dev_info(lt9611->dev,
326 "video check: hactive_a=%d, hactive_b=%d, vactive=%d, v_total=%d, h_total_sysclk=%d\n",
327 hactive_a, hactive_b, vactive, v_total, h_total_sysclk);
328
329 return 0;
330
331end:
332 dev_err(lt9611->dev, "read video check error\n");
333 return temp;
334}
335
336static void lt9611_hdmi_set_infoframes(struct lt9611 *lt9611,
337 struct drm_connector *connector,
338 struct drm_display_mode *mode)
339{
340 union hdmi_infoframe infoframe;
341 ssize_t len;
342 u8 iframes = 0x0a; /* UD1 infoframe */
343 u8 buf[32];
344 int ret;
345 int i;
346
347 ret = drm_hdmi_avi_infoframe_from_display_mode(&infoframe.avi,
348 connector,
349 mode);
350 if (ret < 0)
351 goto out;
352
353 len = hdmi_infoframe_pack(&infoframe, buf, sizeof(buf));
354 if (len < 0)
355 goto out;
356
357 for (i = 0; i < len; i++)
358 regmap_write(lt9611->regmap, 0x8440 + i, buf[i]);
359
360 ret = drm_hdmi_vendor_infoframe_from_display_mode(&infoframe.vendor.hdmi,
361 connector,
362 mode);
363 if (ret < 0)
364 goto out;
365
366 len = hdmi_infoframe_pack(&infoframe, buf, sizeof(buf));
367 if (len < 0)
368 goto out;
369
370 for (i = 0; i < len; i++)
371 regmap_write(lt9611->regmap, 0x8474 + i, buf[i]);
372
373 iframes |= 0x20;
374
375out:
376 regmap_write(lt9611->regmap, 0x843d, iframes); /* UD1 infoframe */
377}
378
379static void lt9611_hdmi_tx_digital(struct lt9611 *lt9611, bool is_hdmi)
380{
381 if (is_hdmi)
382 regmap_write(lt9611->regmap, 0x82d6, 0x8c);
383 else
384 regmap_write(lt9611->regmap, 0x82d6, 0x0c);
385 regmap_write(lt9611->regmap, 0x82d7, 0x04);
386}
387
388static void lt9611_hdmi_tx_phy(struct lt9611 *lt9611)
389{
390 struct reg_sequence reg_cfg[] = {
391 { 0x8130, 0x6a },
392 { 0x8131, 0x44 }, /* HDMI DC mode */
393 { 0x8132, 0x4a },
394 { 0x8133, 0x0b },
395 { 0x8134, 0x00 },
396 { 0x8135, 0x00 },
397 { 0x8136, 0x00 },
398 { 0x8137, 0x44 },
399 { 0x813f, 0x0f },
400 { 0x8140, 0xa0 },
401 { 0x8141, 0xa0 },
402 { 0x8142, 0xa0 },
403 { 0x8143, 0xa0 },
404 { 0x8144, 0x0a },
405 };
406
407 /* HDMI AC mode */
408 if (lt9611->ac_mode)
409 reg_cfg[2].def = 0x73;
410
411 regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg));
412}
413
414static irqreturn_t lt9611_irq_thread_handler(int irq, void *dev_id)
415{
416 struct lt9611 *lt9611 = dev_id;
417 unsigned int irq_flag0 = 0;
418 unsigned int irq_flag3 = 0;
419
420 regmap_read(lt9611->regmap, 0x820f, &irq_flag3);
421 regmap_read(lt9611->regmap, 0x820c, &irq_flag0);
422
423 /* hpd changed low */
424 if (irq_flag3 & 0x80) {
425 dev_info(lt9611->dev, "hdmi cable disconnected\n");
426
427 regmap_write(lt9611->regmap, 0x8207, 0xbf);
428 regmap_write(lt9611->regmap, 0x8207, 0x3f);
429 }
430
431 /* hpd changed high */
432 if (irq_flag3 & 0x40) {
433 dev_info(lt9611->dev, "hdmi cable connected\n");
434
435 regmap_write(lt9611->regmap, 0x8207, 0x7f);
436 regmap_write(lt9611->regmap, 0x8207, 0x3f);
437 }
438
439 if (irq_flag3 & 0xc0 && lt9611->bridge.dev)
440 drm_kms_helper_hotplug_event(lt9611->bridge.dev);
441
442 /* video input changed */
443 if (irq_flag0 & 0x01) {
444 dev_info(lt9611->dev, "video input changed\n");
445 regmap_write(lt9611->regmap, 0x829e, 0xff);
446 regmap_write(lt9611->regmap, 0x829e, 0xf7);
447 regmap_write(lt9611->regmap, 0x8204, 0xff);
448 regmap_write(lt9611->regmap, 0x8204, 0xfe);
449 }
450
451 return IRQ_HANDLED;
452}
453
454static void lt9611_enable_hpd_interrupts(struct lt9611 *lt9611)
455{
456 unsigned int val;
457
458 regmap_read(lt9611->regmap, 0x8203, &val);
459
460 val &= ~0xc0;
461 regmap_write(lt9611->regmap, 0x8203, val);
462 regmap_write(lt9611->regmap, 0x8207, 0xff); /* clear */
463 regmap_write(lt9611->regmap, 0x8207, 0x3f);
464}
465
466static void lt9611_sleep_setup(struct lt9611 *lt9611)
467{
468 const struct reg_sequence sleep_setup[] = {
469 { 0x8024, 0x76 },
470 { 0x8023, 0x01 },
471 { 0x8157, 0x03 }, /* set addr pin as output */
472 { 0x8149, 0x0b },
473
474 { 0x8102, 0x48 }, /* MIPI Rx power down */
475 { 0x8123, 0x80 },
476 { 0x8130, 0x00 },
477 { 0x8011, 0x0a },
478 };
479
480 regmap_multi_reg_write(lt9611->regmap,
481 sleep_setup, ARRAY_SIZE(sleep_setup));
482 lt9611->sleep = true;
483}
484
485static int lt9611_power_on(struct lt9611 *lt9611)
486{
487 int ret;
488 const struct reg_sequence seq[] = {
489 /* LT9611_System_Init */
490 { 0x8101, 0x18 }, /* sel xtal clock */
491
492 /* timer for frequency meter */
493 { 0x821b, 0x69 }, /* timer 2 */
494 { 0x821c, 0x78 },
495 { 0x82cb, 0x69 }, /* timer 1 */
496 { 0x82cc, 0x78 },
497
498 /* irq init */
499 { 0x8251, 0x01 },
500 { 0x8258, 0x0a }, /* hpd irq */
501 { 0x8259, 0x80 }, /* hpd debounce width */
502 { 0x829e, 0xf7 }, /* video check irq */
503
504 /* power consumption for work */
505 { 0x8004, 0xf0 },
506 { 0x8006, 0xf0 },
507 { 0x800a, 0x80 },
508 { 0x800b, 0x40 },
509 { 0x800d, 0xef },
510 { 0x8011, 0xfa },
511 };
512
513 if (lt9611->power_on)
514 return 0;
515
516 ret = regmap_multi_reg_write(lt9611->regmap, seq, ARRAY_SIZE(seq));
517 if (!ret)
518 lt9611->power_on = true;
519
520 return ret;
521}
522
523static int lt9611_power_off(struct lt9611 *lt9611)
524{
525 int ret;
526
527 ret = regmap_write(lt9611->regmap, 0x8130, 0x6a);
528 if (!ret)
529 lt9611->power_on = false;
530
531 return ret;
532}
533
534static void lt9611_reset(struct lt9611 *lt9611)
535{
536 gpiod_set_value_cansleep(lt9611->reset_gpio, 1);
537 msleep(20);
538
539 gpiod_set_value_cansleep(lt9611->reset_gpio, 0);
540 msleep(20);
541
542 gpiod_set_value_cansleep(lt9611->reset_gpio, 1);
543 msleep(100);
544}
545
546static void lt9611_assert_5v(struct lt9611 *lt9611)
547{
548 if (!lt9611->enable_gpio)
549 return;
550
551 gpiod_set_value_cansleep(lt9611->enable_gpio, 1);
552 msleep(20);
553}
554
555static int lt9611_regulator_init(struct lt9611 *lt9611)
556{
557 int ret;
558
559 lt9611->supplies[0].supply = "vdd";
560 lt9611->supplies[1].supply = "vcc";
561
562 ret = devm_regulator_bulk_get(lt9611->dev, 2, lt9611->supplies);
563 if (ret < 0)
564 return ret;
565
566 return regulator_set_load(lt9611->supplies[0].consumer, 300000);
567}
568
569static int lt9611_regulator_enable(struct lt9611 *lt9611)
570{
571 int ret;
572
573 ret = regulator_enable(lt9611->supplies[0].consumer);
574 if (ret < 0)
575 return ret;
576
577 usleep_range(1000, 10000);
578
579 ret = regulator_enable(lt9611->supplies[1].consumer);
580 if (ret < 0) {
581 regulator_disable(lt9611->supplies[0].consumer);
582 return ret;
583 }
584
585 return 0;
586}
587
588static enum drm_connector_status lt9611_bridge_detect(struct drm_bridge *bridge)
589{
590 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
591 unsigned int reg_val = 0;
592 int connected = 0;
593
594 regmap_read(lt9611->regmap, 0x825e, ®_val);
595 connected = (reg_val & (BIT(2) | BIT(0)));
596
597 lt9611->status = connected ? connector_status_connected :
598 connector_status_disconnected;
599
600 return lt9611->status;
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
684/* bridge funcs */
685static void
686lt9611_bridge_atomic_enable(struct drm_bridge *bridge,
687 struct drm_bridge_state *old_bridge_state)
688{
689 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
690 struct drm_atomic_state *state = old_bridge_state->base.state;
691 struct drm_connector *connector;
692 struct drm_connector_state *conn_state;
693 struct drm_crtc_state *crtc_state;
694 struct drm_display_mode *mode;
695 unsigned int postdiv;
696
697 connector = drm_atomic_get_new_connector_for_encoder(state, bridge->encoder);
698 if (WARN_ON(!connector))
699 return;
700
701 conn_state = drm_atomic_get_new_connector_state(state, connector);
702 if (WARN_ON(!conn_state))
703 return;
704
705 crtc_state = drm_atomic_get_new_crtc_state(state, conn_state->crtc);
706 if (WARN_ON(!crtc_state))
707 return;
708
709 mode = &crtc_state->adjusted_mode;
710
711 lt9611_mipi_input_digital(lt9611, mode);
712 lt9611_pll_setup(lt9611, mode, &postdiv);
713 lt9611_mipi_video_setup(lt9611, mode);
714 lt9611_pcr_setup(lt9611, mode, postdiv);
715
716 if (lt9611_power_on(lt9611)) {
717 dev_err(lt9611->dev, "power on failed\n");
718 return;
719 }
720
721 lt9611_mipi_input_analog(lt9611);
722 lt9611_hdmi_set_infoframes(lt9611, connector, mode);
723 lt9611_hdmi_tx_digital(lt9611, connector->display_info.is_hdmi);
724 lt9611_hdmi_tx_phy(lt9611);
725
726 msleep(500);
727
728 lt9611_video_check(lt9611);
729
730 /* Enable HDMI output */
731 regmap_write(lt9611->regmap, 0x8130, 0xea);
732}
733
734static void
735lt9611_bridge_atomic_disable(struct drm_bridge *bridge,
736 struct drm_bridge_state *old_bridge_state)
737{
738 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
739 int ret;
740
741 /* Disable HDMI output */
742 ret = regmap_write(lt9611->regmap, 0x8130, 0x6a);
743 if (ret) {
744 dev_err(lt9611->dev, "video on failed\n");
745 return;
746 }
747
748 if (lt9611_power_off(lt9611)) {
749 dev_err(lt9611->dev, "power on failed\n");
750 return;
751 }
752}
753
754static struct mipi_dsi_device *lt9611_attach_dsi(struct lt9611 *lt9611,
755 struct device_node *dsi_node)
756{
757 const struct mipi_dsi_device_info info = { "lt9611", 0, lt9611->dev->of_node};
758 struct mipi_dsi_device *dsi;
759 struct mipi_dsi_host *host;
760 struct device *dev = lt9611->dev;
761 int ret;
762
763 host = of_find_mipi_dsi_host_by_node(dsi_node);
764 if (!host)
765 return ERR_PTR(dev_err_probe(lt9611->dev, -EPROBE_DEFER, "failed to find dsi host\n"));
766
767 dsi = devm_mipi_dsi_device_register_full(dev, host, &info);
768 if (IS_ERR(dsi)) {
769 dev_err(lt9611->dev, "failed to create dsi device\n");
770 return dsi;
771 }
772
773 dsi->lanes = 4;
774 dsi->format = MIPI_DSI_FMT_RGB888;
775 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
776 MIPI_DSI_MODE_VIDEO_HSE;
777
778 ret = devm_mipi_dsi_attach(dev, dsi);
779 if (ret < 0) {
780 dev_err(dev, "failed to attach dsi to host\n");
781 return ERR_PTR(ret);
782 }
783
784 return dsi;
785}
786
787static int lt9611_bridge_attach(struct drm_bridge *bridge,
788 enum drm_bridge_attach_flags flags)
789{
790 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
791
792 return drm_bridge_attach(bridge->encoder, lt9611->next_bridge,
793 bridge, flags);
794}
795
796static enum drm_mode_status lt9611_bridge_mode_valid(struct drm_bridge *bridge,
797 const struct drm_display_info *info,
798 const struct drm_display_mode *mode)
799{
800 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
801
802 if (mode->hdisplay > 3840)
803 return MODE_BAD_HVALUE;
804
805 if (mode->vdisplay > 2160)
806 return MODE_BAD_VVALUE;
807
808 if (mode->hdisplay == 3840 &&
809 mode->vdisplay == 2160 &&
810 drm_mode_vrefresh(mode) > 30)
811 return MODE_CLOCK_HIGH;
812
813 if (mode->hdisplay > 2000 && !lt9611->dsi1_node)
814 return MODE_PANEL;
815 else
816 return MODE_OK;
817}
818
819static void lt9611_bridge_atomic_pre_enable(struct drm_bridge *bridge,
820 struct drm_bridge_state *old_bridge_state)
821{
822 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
823 static const struct reg_sequence reg_cfg[] = {
824 { 0x8102, 0x12 },
825 { 0x8123, 0x40 },
826 { 0x8130, 0xea },
827 { 0x8011, 0xfa },
828 };
829
830 if (!lt9611->sleep)
831 return;
832
833 regmap_multi_reg_write(lt9611->regmap,
834 reg_cfg, ARRAY_SIZE(reg_cfg));
835
836 lt9611->sleep = false;
837}
838
839static void
840lt9611_bridge_atomic_post_disable(struct drm_bridge *bridge,
841 struct drm_bridge_state *old_bridge_state)
842{
843 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
844
845 lt9611_sleep_setup(lt9611);
846}
847
848static const struct drm_edid *lt9611_bridge_edid_read(struct drm_bridge *bridge,
849 struct drm_connector *connector)
850{
851 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
852
853 lt9611_power_on(lt9611);
854 return drm_edid_read_custom(connector, lt9611_get_edid_block, lt9611);
855}
856
857static void lt9611_bridge_hpd_enable(struct drm_bridge *bridge)
858{
859 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
860
861 lt9611_enable_hpd_interrupts(lt9611);
862}
863
864#define MAX_INPUT_SEL_FORMATS 1
865
866static u32 *
867lt9611_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
868 struct drm_bridge_state *bridge_state,
869 struct drm_crtc_state *crtc_state,
870 struct drm_connector_state *conn_state,
871 u32 output_fmt,
872 unsigned int *num_input_fmts)
873{
874 u32 *input_fmts;
875
876 *num_input_fmts = 0;
877
878 input_fmts = kcalloc(MAX_INPUT_SEL_FORMATS, sizeof(*input_fmts),
879 GFP_KERNEL);
880 if (!input_fmts)
881 return NULL;
882
883 /* This is the DSI-end bus format */
884 input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24;
885 *num_input_fmts = 1;
886
887 return input_fmts;
888}
889
890static const struct drm_bridge_funcs lt9611_bridge_funcs = {
891 .attach = lt9611_bridge_attach,
892 .mode_valid = lt9611_bridge_mode_valid,
893 .detect = lt9611_bridge_detect,
894 .edid_read = lt9611_bridge_edid_read,
895 .hpd_enable = lt9611_bridge_hpd_enable,
896
897 .atomic_pre_enable = lt9611_bridge_atomic_pre_enable,
898 .atomic_enable = lt9611_bridge_atomic_enable,
899 .atomic_disable = lt9611_bridge_atomic_disable,
900 .atomic_post_disable = lt9611_bridge_atomic_post_disable,
901 .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
902 .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
903 .atomic_reset = drm_atomic_helper_bridge_reset,
904 .atomic_get_input_bus_fmts = lt9611_atomic_get_input_bus_fmts,
905};
906
907static int lt9611_parse_dt(struct device *dev,
908 struct lt9611 *lt9611)
909{
910 lt9611->dsi0_node = of_graph_get_remote_node(dev->of_node, 0, -1);
911 if (!lt9611->dsi0_node) {
912 dev_err(lt9611->dev, "failed to get remote node for primary dsi\n");
913 return -ENODEV;
914 }
915
916 lt9611->dsi1_node = of_graph_get_remote_node(dev->of_node, 1, -1);
917
918 lt9611->ac_mode = of_property_read_bool(dev->of_node, "lt,ac-mode");
919
920 return drm_of_find_panel_or_bridge(dev->of_node, 2, -1, NULL, <9611->next_bridge);
921}
922
923static int lt9611_gpio_init(struct lt9611 *lt9611)
924{
925 struct device *dev = lt9611->dev;
926
927 lt9611->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
928 if (IS_ERR(lt9611->reset_gpio)) {
929 dev_err(dev, "failed to acquire reset gpio\n");
930 return PTR_ERR(lt9611->reset_gpio);
931 }
932
933 lt9611->enable_gpio = devm_gpiod_get_optional(dev, "enable",
934 GPIOD_OUT_LOW);
935 if (IS_ERR(lt9611->enable_gpio)) {
936 dev_err(dev, "failed to acquire enable gpio\n");
937 return PTR_ERR(lt9611->enable_gpio);
938 }
939
940 return 0;
941}
942
943static int lt9611_read_device_rev(struct lt9611 *lt9611)
944{
945 unsigned int rev;
946 int ret;
947
948 regmap_write(lt9611->regmap, 0x80ee, 0x01);
949 ret = regmap_read(lt9611->regmap, 0x8002, &rev);
950 if (ret)
951 dev_err(lt9611->dev, "failed to read revision: %d\n", ret);
952 else
953 dev_info(lt9611->dev, "LT9611 revision: 0x%x\n", rev);
954
955 return ret;
956}
957
958static int lt9611_hdmi_hw_params(struct device *dev, void *data,
959 struct hdmi_codec_daifmt *fmt,
960 struct hdmi_codec_params *hparms)
961{
962 struct lt9611 *lt9611 = data;
963
964 if (hparms->sample_rate == 48000)
965 regmap_write(lt9611->regmap, 0x840f, 0x2b);
966 else if (hparms->sample_rate == 96000)
967 regmap_write(lt9611->regmap, 0x840f, 0xab);
968 else
969 return -EINVAL;
970
971 regmap_write(lt9611->regmap, 0x8435, 0x00);
972 regmap_write(lt9611->regmap, 0x8436, 0x18);
973 regmap_write(lt9611->regmap, 0x8437, 0x00);
974
975 return 0;
976}
977
978static int lt9611_audio_startup(struct device *dev, void *data)
979{
980 struct lt9611 *lt9611 = data;
981
982 regmap_write(lt9611->regmap, 0x82d6, 0x8c);
983 regmap_write(lt9611->regmap, 0x82d7, 0x04);
984
985 regmap_write(lt9611->regmap, 0x8406, 0x08);
986 regmap_write(lt9611->regmap, 0x8407, 0x10);
987
988 regmap_write(lt9611->regmap, 0x8434, 0xd5);
989
990 return 0;
991}
992
993static void lt9611_audio_shutdown(struct device *dev, void *data)
994{
995 struct lt9611 *lt9611 = data;
996
997 regmap_write(lt9611->regmap, 0x8406, 0x00);
998 regmap_write(lt9611->regmap, 0x8407, 0x00);
999}
1000
1001static int lt9611_hdmi_i2s_get_dai_id(struct snd_soc_component *component,
1002 struct device_node *endpoint)
1003{
1004 struct of_endpoint of_ep;
1005 int ret;
1006
1007 ret = of_graph_parse_endpoint(endpoint, &of_ep);
1008 if (ret < 0)
1009 return ret;
1010
1011 /*
1012 * HDMI sound should be located as reg = <2>
1013 * Then, it is sound port 0
1014 */
1015 if (of_ep.port == 2)
1016 return 0;
1017
1018 return -EINVAL;
1019}
1020
1021static const struct hdmi_codec_ops lt9611_codec_ops = {
1022 .hw_params = lt9611_hdmi_hw_params,
1023 .audio_shutdown = lt9611_audio_shutdown,
1024 .audio_startup = lt9611_audio_startup,
1025 .get_dai_id = lt9611_hdmi_i2s_get_dai_id,
1026};
1027
1028static struct hdmi_codec_pdata codec_data = {
1029 .ops = <9611_codec_ops,
1030 .max_i2s_channels = 8,
1031 .i2s = 1,
1032};
1033
1034static int lt9611_audio_init(struct device *dev, struct lt9611 *lt9611)
1035{
1036 codec_data.data = lt9611;
1037 lt9611->audio_pdev =
1038 platform_device_register_data(dev, HDMI_CODEC_DRV_NAME,
1039 PLATFORM_DEVID_AUTO,
1040 &codec_data, sizeof(codec_data));
1041
1042 return PTR_ERR_OR_ZERO(lt9611->audio_pdev);
1043}
1044
1045static void lt9611_audio_exit(struct lt9611 *lt9611)
1046{
1047 if (lt9611->audio_pdev) {
1048 platform_device_unregister(lt9611->audio_pdev);
1049 lt9611->audio_pdev = NULL;
1050 }
1051}
1052
1053static int lt9611_probe(struct i2c_client *client)
1054{
1055 struct lt9611 *lt9611;
1056 struct device *dev = &client->dev;
1057 int ret;
1058
1059 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
1060 dev_err(dev, "device doesn't support I2C\n");
1061 return -ENODEV;
1062 }
1063
1064 lt9611 = devm_kzalloc(dev, sizeof(*lt9611), GFP_KERNEL);
1065 if (!lt9611)
1066 return -ENOMEM;
1067
1068 lt9611->dev = dev;
1069 lt9611->client = client;
1070 lt9611->sleep = false;
1071
1072 lt9611->regmap = devm_regmap_init_i2c(client, <9611_regmap_config);
1073 if (IS_ERR(lt9611->regmap)) {
1074 dev_err(lt9611->dev, "regmap i2c init failed\n");
1075 return PTR_ERR(lt9611->regmap);
1076 }
1077
1078 ret = lt9611_parse_dt(dev, lt9611);
1079 if (ret) {
1080 dev_err(dev, "failed to parse device tree\n");
1081 return ret;
1082 }
1083
1084 ret = lt9611_gpio_init(lt9611);
1085 if (ret < 0)
1086 goto err_of_put;
1087
1088 ret = lt9611_regulator_init(lt9611);
1089 if (ret < 0)
1090 goto err_of_put;
1091
1092 lt9611_assert_5v(lt9611);
1093
1094 ret = lt9611_regulator_enable(lt9611);
1095 if (ret)
1096 goto err_of_put;
1097
1098 lt9611_reset(lt9611);
1099
1100 ret = lt9611_read_device_rev(lt9611);
1101 if (ret) {
1102 dev_err(dev, "failed to read chip rev\n");
1103 goto err_disable_regulators;
1104 }
1105
1106 ret = devm_request_threaded_irq(dev, client->irq, NULL,
1107 lt9611_irq_thread_handler,
1108 IRQF_ONESHOT, "lt9611", lt9611);
1109 if (ret) {
1110 dev_err(dev, "failed to request irq\n");
1111 goto err_disable_regulators;
1112 }
1113
1114 i2c_set_clientdata(client, lt9611);
1115
1116 lt9611->bridge.funcs = <9611_bridge_funcs;
1117 lt9611->bridge.of_node = client->dev.of_node;
1118 lt9611->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID |
1119 DRM_BRIDGE_OP_HPD | DRM_BRIDGE_OP_MODES;
1120 lt9611->bridge.type = DRM_MODE_CONNECTOR_HDMIA;
1121
1122 drm_bridge_add(<9611->bridge);
1123
1124 /* Attach primary DSI */
1125 lt9611->dsi0 = lt9611_attach_dsi(lt9611, lt9611->dsi0_node);
1126 if (IS_ERR(lt9611->dsi0)) {
1127 ret = PTR_ERR(lt9611->dsi0);
1128 goto err_remove_bridge;
1129 }
1130
1131 /* Attach secondary DSI, if specified */
1132 if (lt9611->dsi1_node) {
1133 lt9611->dsi1 = lt9611_attach_dsi(lt9611, lt9611->dsi1_node);
1134 if (IS_ERR(lt9611->dsi1)) {
1135 ret = PTR_ERR(lt9611->dsi1);
1136 goto err_remove_bridge;
1137 }
1138 }
1139
1140 lt9611_enable_hpd_interrupts(lt9611);
1141
1142 ret = lt9611_audio_init(dev, lt9611);
1143 if (ret)
1144 goto err_remove_bridge;
1145
1146 return 0;
1147
1148err_remove_bridge:
1149 drm_bridge_remove(<9611->bridge);
1150
1151err_disable_regulators:
1152 regulator_bulk_disable(ARRAY_SIZE(lt9611->supplies), lt9611->supplies);
1153
1154err_of_put:
1155 of_node_put(lt9611->dsi1_node);
1156 of_node_put(lt9611->dsi0_node);
1157
1158 return ret;
1159}
1160
1161static void lt9611_remove(struct i2c_client *client)
1162{
1163 struct lt9611 *lt9611 = i2c_get_clientdata(client);
1164
1165 disable_irq(client->irq);
1166 lt9611_audio_exit(lt9611);
1167 drm_bridge_remove(<9611->bridge);
1168
1169 regulator_bulk_disable(ARRAY_SIZE(lt9611->supplies), lt9611->supplies);
1170
1171 of_node_put(lt9611->dsi1_node);
1172 of_node_put(lt9611->dsi0_node);
1173}
1174
1175static struct i2c_device_id lt9611_id[] = {
1176 { "lontium,lt9611", 0 },
1177 {}
1178};
1179MODULE_DEVICE_TABLE(i2c, lt9611_id);
1180
1181static const struct of_device_id lt9611_match_table[] = {
1182 { .compatible = "lontium,lt9611" },
1183 { }
1184};
1185MODULE_DEVICE_TABLE(of, lt9611_match_table);
1186
1187static struct i2c_driver lt9611_driver = {
1188 .driver = {
1189 .name = "lt9611",
1190 .of_match_table = lt9611_match_table,
1191 },
1192 .probe = lt9611_probe,
1193 .remove = lt9611_remove,
1194 .id_table = lt9611_id,
1195};
1196module_i2c_driver(lt9611_driver);
1197
1198MODULE_LICENSE("GPL v2");