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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/interrupt.h>
9#include <linux/module.h>
10#include <linux/of_graph.h>
11#include <linux/platform_device.h>
12#include <linux/regmap.h>
13#include <linux/regulator/consumer.h>
14
15#include <sound/hdmi-codec.h>
16
17#include <drm/drm_atomic_helper.h>
18#include <drm/drm_bridge.h>
19#include <drm/drm_mipi_dsi.h>
20#include <drm/drm_print.h>
21#include <drm/drm_probe_helper.h>
22
23#define EDID_SEG_SIZE 256
24#define EDID_LEN 32
25#define EDID_LOOP 8
26#define KEY_DDC_ACCS_DONE 0x02
27#define DDC_NO_ACK 0x50
28
29#define LT9611_4LANES 0
30
31struct lt9611 {
32 struct device *dev;
33 struct drm_bridge bridge;
34 struct drm_connector connector;
35
36 struct regmap *regmap;
37
38 struct device_node *dsi0_node;
39 struct device_node *dsi1_node;
40 struct mipi_dsi_device *dsi0;
41 struct mipi_dsi_device *dsi1;
42 struct platform_device *audio_pdev;
43
44 bool ac_mode;
45
46 struct gpio_desc *reset_gpio;
47 struct gpio_desc *enable_gpio;
48
49 bool power_on;
50 bool sleep;
51
52 struct regulator_bulk_data supplies[2];
53
54 struct i2c_client *client;
55
56 enum drm_connector_status status;
57
58 u8 edid_buf[EDID_SEG_SIZE];
59 u32 vic;
60};
61
62#define LT9611_PAGE_CONTROL 0xff
63
64static const struct regmap_range_cfg lt9611_ranges[] = {
65 {
66 .name = "register_range",
67 .range_min = 0,
68 .range_max = 0x85ff,
69 .selector_reg = LT9611_PAGE_CONTROL,
70 .selector_mask = 0xff,
71 .selector_shift = 0,
72 .window_start = 0,
73 .window_len = 0x100,
74 },
75};
76
77static const struct regmap_config lt9611_regmap_config = {
78 .reg_bits = 8,
79 .val_bits = 8,
80 .max_register = 0xffff,
81 .ranges = lt9611_ranges,
82 .num_ranges = ARRAY_SIZE(lt9611_ranges),
83};
84
85struct lt9611_mode {
86 u16 hdisplay;
87 u16 vdisplay;
88 u8 vrefresh;
89 u8 lanes;
90 u8 intfs;
91};
92
93static struct lt9611_mode lt9611_modes[] = {
94 { 3840, 2160, 30, 4, 2 }, /* 3840x2160 24bit 30Hz 4Lane 2ports */
95 { 1920, 1080, 60, 4, 1 }, /* 1080P 24bit 60Hz 4lane 1port */
96 { 1920, 1080, 30, 3, 1 }, /* 1080P 24bit 30Hz 3lane 1port */
97 { 1920, 1080, 24, 3, 1 },
98 { 720, 480, 60, 4, 1 },
99 { 720, 576, 50, 2, 1 },
100 { 640, 480, 60, 2, 1 },
101};
102
103static struct lt9611 *bridge_to_lt9611(struct drm_bridge *bridge)
104{
105 return container_of(bridge, struct lt9611, bridge);
106}
107
108static struct lt9611 *connector_to_lt9611(struct drm_connector *connector)
109{
110 return container_of(connector, struct lt9611, connector);
111}
112
113static int lt9611_mipi_input_analog(struct lt9611 *lt9611)
114{
115 const struct reg_sequence reg_cfg[] = {
116 { 0x8106, 0x40 }, /* port A rx current */
117 { 0x810a, 0xfe }, /* port A ldo voltage set */
118 { 0x810b, 0xbf }, /* enable port A lprx */
119 { 0x8111, 0x40 }, /* port B rx current */
120 { 0x8115, 0xfe }, /* port B ldo voltage set */
121 { 0x8116, 0xbf }, /* enable port B lprx */
122
123 { 0x811c, 0x03 }, /* PortA clk lane no-LP mode */
124 { 0x8120, 0x03 }, /* PortB clk lane with-LP mode */
125 };
126
127 return regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg));
128}
129
130static int lt9611_mipi_input_digital(struct lt9611 *lt9611,
131 const struct drm_display_mode *mode)
132{
133 struct reg_sequence reg_cfg[] = {
134 { 0x8300, LT9611_4LANES },
135 { 0x830a, 0x00 },
136 { 0x824f, 0x80 },
137 { 0x8250, 0x10 },
138 { 0x8302, 0x0a },
139 { 0x8306, 0x0a },
140 };
141
142 if (mode->hdisplay == 3840)
143 reg_cfg[1].def = 0x03;
144
145 return regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg));
146}
147
148static void lt9611_mipi_video_setup(struct lt9611 *lt9611,
149 const struct drm_display_mode *mode)
150{
151 u32 h_total, hactive, hsync_len, hfront_porch, hsync_porch;
152 u32 v_total, vactive, vsync_len, vfront_porch, vsync_porch;
153
154 h_total = mode->htotal;
155 v_total = mode->vtotal;
156
157 hactive = mode->hdisplay;
158 hsync_len = mode->hsync_end - mode->hsync_start;
159 hfront_porch = mode->hsync_start - mode->hdisplay;
160 hsync_porch = hsync_len + mode->htotal - mode->hsync_end;
161
162 vactive = mode->vdisplay;
163 vsync_len = mode->vsync_end - mode->vsync_start;
164 vfront_porch = mode->vsync_start - mode->vdisplay;
165 vsync_porch = vsync_len + mode->vtotal - mode->vsync_end;
166
167 regmap_write(lt9611->regmap, 0x830d, (u8)(v_total / 256));
168 regmap_write(lt9611->regmap, 0x830e, (u8)(v_total % 256));
169
170 regmap_write(lt9611->regmap, 0x830f, (u8)(vactive / 256));
171 regmap_write(lt9611->regmap, 0x8310, (u8)(vactive % 256));
172
173 regmap_write(lt9611->regmap, 0x8311, (u8)(h_total / 256));
174 regmap_write(lt9611->regmap, 0x8312, (u8)(h_total % 256));
175
176 regmap_write(lt9611->regmap, 0x8313, (u8)(hactive / 256));
177 regmap_write(lt9611->regmap, 0x8314, (u8)(hactive % 256));
178
179 regmap_write(lt9611->regmap, 0x8315, (u8)(vsync_len % 256));
180 regmap_write(lt9611->regmap, 0x8316, (u8)(hsync_len % 256));
181
182 regmap_write(lt9611->regmap, 0x8317, (u8)(vfront_porch % 256));
183
184 regmap_write(lt9611->regmap, 0x8318, (u8)(vsync_porch % 256));
185
186 regmap_write(lt9611->regmap, 0x8319, (u8)(hfront_porch % 256));
187
188 regmap_write(lt9611->regmap, 0x831a, (u8)(hsync_porch / 256));
189 regmap_write(lt9611->regmap, 0x831b, (u8)(hsync_porch % 256));
190}
191
192static void lt9611_pcr_setup(struct lt9611 *lt9611, const struct drm_display_mode *mode)
193{
194 const struct reg_sequence reg_cfg[] = {
195 { 0x830b, 0x01 },
196 { 0x830c, 0x10 },
197 { 0x8348, 0x00 },
198 { 0x8349, 0x81 },
199
200 /* stage 1 */
201 { 0x8321, 0x4a },
202 { 0x8324, 0x71 },
203 { 0x8325, 0x30 },
204 { 0x832a, 0x01 },
205
206 /* stage 2 */
207 { 0x834a, 0x40 },
208 { 0x831d, 0x10 },
209
210 /* MK limit */
211 { 0x832d, 0x38 },
212 { 0x8331, 0x08 },
213 };
214 const struct reg_sequence reg_cfg2[] = {
215 { 0x830b, 0x03 },
216 { 0x830c, 0xd0 },
217 { 0x8348, 0x03 },
218 { 0x8349, 0xe0 },
219 { 0x8324, 0x72 },
220 { 0x8325, 0x00 },
221 { 0x832a, 0x01 },
222 { 0x834a, 0x10 },
223 { 0x831d, 0x10 },
224 { 0x8326, 0x37 },
225 };
226
227 regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg));
228
229 switch (mode->hdisplay) {
230 case 640:
231 regmap_write(lt9611->regmap, 0x8326, 0x14);
232 break;
233 case 1920:
234 regmap_write(lt9611->regmap, 0x8326, 0x37);
235 break;
236 case 3840:
237 regmap_multi_reg_write(lt9611->regmap, reg_cfg2, ARRAY_SIZE(reg_cfg2));
238 break;
239 }
240
241 /* pcr rst */
242 regmap_write(lt9611->regmap, 0x8011, 0x5a);
243 regmap_write(lt9611->regmap, 0x8011, 0xfa);
244}
245
246static int lt9611_pll_setup(struct lt9611 *lt9611, const struct drm_display_mode *mode)
247{
248 unsigned int pclk = mode->clock;
249 const struct reg_sequence reg_cfg[] = {
250 /* txpll init */
251 { 0x8123, 0x40 },
252 { 0x8124, 0x64 },
253 { 0x8125, 0x80 },
254 { 0x8126, 0x55 },
255 { 0x812c, 0x37 },
256 { 0x812f, 0x01 },
257 { 0x8126, 0x55 },
258 { 0x8127, 0x66 },
259 { 0x8128, 0x88 },
260 };
261
262 regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg));
263
264 if (pclk > 150000)
265 regmap_write(lt9611->regmap, 0x812d, 0x88);
266 else if (pclk > 70000)
267 regmap_write(lt9611->regmap, 0x812d, 0x99);
268 else
269 regmap_write(lt9611->regmap, 0x812d, 0xaa);
270
271 /*
272 * first divide pclk by 2 first
273 * - write divide by 64k to 19:16 bits which means shift by 17
274 * - write divide by 256 to 15:8 bits which means shift by 9
275 * - write remainder to 7:0 bits, which means shift by 1
276 */
277 regmap_write(lt9611->regmap, 0x82e3, pclk >> 17); /* pclk[19:16] */
278 regmap_write(lt9611->regmap, 0x82e4, pclk >> 9); /* pclk[15:8] */
279 regmap_write(lt9611->regmap, 0x82e5, pclk >> 1); /* pclk[7:0] */
280
281 regmap_write(lt9611->regmap, 0x82de, 0x20);
282 regmap_write(lt9611->regmap, 0x82de, 0xe0);
283
284 regmap_write(lt9611->regmap, 0x8016, 0xf1);
285 regmap_write(lt9611->regmap, 0x8016, 0xf3);
286
287 return 0;
288}
289
290static int lt9611_read_video_check(struct lt9611 *lt9611, unsigned int reg)
291{
292 unsigned int temp, temp2;
293 int ret;
294
295 ret = regmap_read(lt9611->regmap, reg, &temp);
296 if (ret)
297 return ret;
298 temp <<= 8;
299 ret = regmap_read(lt9611->regmap, reg + 1, &temp2);
300 if (ret)
301 return ret;
302
303 return (temp + temp2);
304}
305
306static int lt9611_video_check(struct lt9611 *lt9611)
307{
308 u32 v_total, vactive, hactive_a, hactive_b, h_total_sysclk;
309 int temp;
310
311 /* top module video check */
312
313 /* vactive */
314 temp = lt9611_read_video_check(lt9611, 0x8282);
315 if (temp < 0)
316 goto end;
317 vactive = temp;
318
319 /* v_total */
320 temp = lt9611_read_video_check(lt9611, 0x826c);
321 if (temp < 0)
322 goto end;
323 v_total = temp;
324
325 /* h_total_sysclk */
326 temp = lt9611_read_video_check(lt9611, 0x8286);
327 if (temp < 0)
328 goto end;
329 h_total_sysclk = temp;
330
331 /* hactive_a */
332 temp = lt9611_read_video_check(lt9611, 0x8382);
333 if (temp < 0)
334 goto end;
335 hactive_a = temp / 3;
336
337 /* hactive_b */
338 temp = lt9611_read_video_check(lt9611, 0x8386);
339 if (temp < 0)
340 goto end;
341 hactive_b = temp / 3;
342
343 dev_info(lt9611->dev,
344 "video check: hactive_a=%d, hactive_b=%d, vactive=%d, v_total=%d, h_total_sysclk=%d\n",
345 hactive_a, hactive_b, vactive, v_total, h_total_sysclk);
346
347 return 0;
348
349end:
350 dev_err(lt9611->dev, "read video check error\n");
351 return temp;
352}
353
354static void lt9611_hdmi_tx_digital(struct lt9611 *lt9611)
355{
356 regmap_write(lt9611->regmap, 0x8443, 0x46 - lt9611->vic);
357 regmap_write(lt9611->regmap, 0x8447, lt9611->vic);
358 regmap_write(lt9611->regmap, 0x843d, 0x0a); /* UD1 infoframe */
359
360 regmap_write(lt9611->regmap, 0x82d6, 0x8c);
361 regmap_write(lt9611->regmap, 0x82d7, 0x04);
362}
363
364static void lt9611_hdmi_tx_phy(struct lt9611 *lt9611)
365{
366 struct reg_sequence reg_cfg[] = {
367 { 0x8130, 0x6a },
368 { 0x8131, 0x44 }, /* HDMI DC mode */
369 { 0x8132, 0x4a },
370 { 0x8133, 0x0b },
371 { 0x8134, 0x00 },
372 { 0x8135, 0x00 },
373 { 0x8136, 0x00 },
374 { 0x8137, 0x44 },
375 { 0x813f, 0x0f },
376 { 0x8140, 0xa0 },
377 { 0x8141, 0xa0 },
378 { 0x8142, 0xa0 },
379 { 0x8143, 0xa0 },
380 { 0x8144, 0x0a },
381 };
382
383 /* HDMI AC mode */
384 if (lt9611->ac_mode)
385 reg_cfg[2].def = 0x73;
386
387 regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg));
388}
389
390static irqreturn_t lt9611_irq_thread_handler(int irq, void *dev_id)
391{
392 struct lt9611 *lt9611 = dev_id;
393 unsigned int irq_flag0 = 0;
394 unsigned int irq_flag3 = 0;
395
396 regmap_read(lt9611->regmap, 0x820f, &irq_flag3);
397 regmap_read(lt9611->regmap, 0x820c, &irq_flag0);
398
399 /* hpd changed low */
400 if (irq_flag3 & 0x80) {
401 dev_info(lt9611->dev, "hdmi cable disconnected\n");
402
403 regmap_write(lt9611->regmap, 0x8207, 0xbf);
404 regmap_write(lt9611->regmap, 0x8207, 0x3f);
405 }
406
407 /* hpd changed high */
408 if (irq_flag3 & 0x40) {
409 dev_info(lt9611->dev, "hdmi cable connected\n");
410
411 regmap_write(lt9611->regmap, 0x8207, 0x7f);
412 regmap_write(lt9611->regmap, 0x8207, 0x3f);
413 }
414
415 if (irq_flag3 & 0xc0 && lt9611->bridge.dev)
416 drm_kms_helper_hotplug_event(lt9611->bridge.dev);
417
418 /* video input changed */
419 if (irq_flag0 & 0x01) {
420 dev_info(lt9611->dev, "video input changed\n");
421 regmap_write(lt9611->regmap, 0x829e, 0xff);
422 regmap_write(lt9611->regmap, 0x829e, 0xf7);
423 regmap_write(lt9611->regmap, 0x8204, 0xff);
424 regmap_write(lt9611->regmap, 0x8204, 0xfe);
425 }
426
427 return IRQ_HANDLED;
428}
429
430static void lt9611_enable_hpd_interrupts(struct lt9611 *lt9611)
431{
432 unsigned int val;
433
434 regmap_read(lt9611->regmap, 0x8203, &val);
435
436 val &= ~0xc0;
437 regmap_write(lt9611->regmap, 0x8203, val);
438 regmap_write(lt9611->regmap, 0x8207, 0xff); /* clear */
439 regmap_write(lt9611->regmap, 0x8207, 0x3f);
440}
441
442static void lt9611_sleep_setup(struct lt9611 *lt9611)
443{
444 const struct reg_sequence sleep_setup[] = {
445 { 0x8024, 0x76 },
446 { 0x8023, 0x01 },
447 { 0x8157, 0x03 }, /* set addr pin as output */
448 { 0x8149, 0x0b },
449 { 0x8151, 0x30 }, /* disable IRQ */
450 { 0x8102, 0x48 }, /* MIPI Rx power down */
451 { 0x8123, 0x80 },
452 { 0x8130, 0x00 },
453 { 0x8100, 0x01 }, /* bandgap power down */
454 { 0x8101, 0x00 }, /* system clk power down */
455 };
456
457 regmap_multi_reg_write(lt9611->regmap,
458 sleep_setup, ARRAY_SIZE(sleep_setup));
459 lt9611->sleep = true;
460}
461
462static int lt9611_power_on(struct lt9611 *lt9611)
463{
464 int ret;
465 const struct reg_sequence seq[] = {
466 /* LT9611_System_Init */
467 { 0x8101, 0x18 }, /* sel xtal clock */
468
469 /* timer for frequency meter */
470 { 0x821b, 0x69 }, /* timer 2 */
471 { 0x821c, 0x78 },
472 { 0x82cb, 0x69 }, /* timer 1 */
473 { 0x82cc, 0x78 },
474
475 /* irq init */
476 { 0x8251, 0x01 },
477 { 0x8258, 0x0a }, /* hpd irq */
478 { 0x8259, 0x80 }, /* hpd debounce width */
479 { 0x829e, 0xf7 }, /* video check irq */
480
481 /* power consumption for work */
482 { 0x8004, 0xf0 },
483 { 0x8006, 0xf0 },
484 { 0x800a, 0x80 },
485 { 0x800b, 0x40 },
486 { 0x800d, 0xef },
487 { 0x8011, 0xfa },
488 };
489
490 if (lt9611->power_on)
491 return 0;
492
493 ret = regmap_multi_reg_write(lt9611->regmap, seq, ARRAY_SIZE(seq));
494 if (!ret)
495 lt9611->power_on = true;
496
497 return ret;
498}
499
500static int lt9611_power_off(struct lt9611 *lt9611)
501{
502 int ret;
503
504 ret = regmap_write(lt9611->regmap, 0x8130, 0x6a);
505 if (!ret)
506 lt9611->power_on = false;
507
508 return ret;
509}
510
511static void lt9611_reset(struct lt9611 *lt9611)
512{
513 gpiod_set_value_cansleep(lt9611->reset_gpio, 1);
514 msleep(20);
515
516 gpiod_set_value_cansleep(lt9611->reset_gpio, 0);
517 msleep(20);
518
519 gpiod_set_value_cansleep(lt9611->reset_gpio, 1);
520 msleep(100);
521}
522
523static void lt9611_assert_5v(struct lt9611 *lt9611)
524{
525 if (!lt9611->enable_gpio)
526 return;
527
528 gpiod_set_value_cansleep(lt9611->enable_gpio, 1);
529 msleep(20);
530}
531
532static int lt9611_regulator_init(struct lt9611 *lt9611)
533{
534 int ret;
535
536 lt9611->supplies[0].supply = "vdd";
537 lt9611->supplies[1].supply = "vcc";
538
539 ret = devm_regulator_bulk_get(lt9611->dev, 2, lt9611->supplies);
540 if (ret < 0)
541 return ret;
542
543 return regulator_set_load(lt9611->supplies[0].consumer, 300000);
544}
545
546static int lt9611_regulator_enable(struct lt9611 *lt9611)
547{
548 int ret;
549
550 ret = regulator_enable(lt9611->supplies[0].consumer);
551 if (ret < 0)
552 return ret;
553
554 usleep_range(1000, 10000);
555
556 ret = regulator_enable(lt9611->supplies[1].consumer);
557 if (ret < 0) {
558 regulator_disable(lt9611->supplies[0].consumer);
559 return ret;
560 }
561
562 return 0;
563}
564
565static struct lt9611_mode *lt9611_find_mode(const struct drm_display_mode *mode)
566{
567 int i;
568
569 for (i = 0; i < ARRAY_SIZE(lt9611_modes); i++) {
570 if (lt9611_modes[i].hdisplay == mode->hdisplay &&
571 lt9611_modes[i].vdisplay == mode->vdisplay &&
572 lt9611_modes[i].vrefresh == drm_mode_vrefresh(mode)) {
573 return <9611_modes[i];
574 }
575 }
576
577 return NULL;
578}
579
580/* connector funcs */
581static enum drm_connector_status
582lt9611_connector_detect(struct drm_connector *connector, bool force)
583{
584 struct lt9611 *lt9611 = connector_to_lt9611(connector);
585 unsigned int reg_val = 0;
586 int connected = 0;
587
588 regmap_read(lt9611->regmap, 0x825e, ®_val);
589 connected = (reg_val & BIT(2));
590
591 lt9611->status = connected ? connector_status_connected :
592 connector_status_disconnected;
593
594 return lt9611->status;
595}
596
597static int lt9611_read_edid(struct lt9611 *lt9611)
598{
599 unsigned int temp;
600 int ret = 0;
601 int i, j;
602
603 /* memset to clear old buffer, if any */
604 memset(lt9611->edid_buf, 0, sizeof(lt9611->edid_buf));
605
606 regmap_write(lt9611->regmap, 0x8503, 0xc9);
607
608 /* 0xA0 is EDID device address */
609 regmap_write(lt9611->regmap, 0x8504, 0xa0);
610 /* 0x00 is EDID offset address */
611 regmap_write(lt9611->regmap, 0x8505, 0x00);
612
613 /* length for read */
614 regmap_write(lt9611->regmap, 0x8506, EDID_LEN);
615 regmap_write(lt9611->regmap, 0x8514, 0x7f);
616
617 for (i = 0; i < EDID_LOOP; i++) {
618 /* offset address */
619 regmap_write(lt9611->regmap, 0x8505, i * EDID_LEN);
620 regmap_write(lt9611->regmap, 0x8507, 0x36);
621 regmap_write(lt9611->regmap, 0x8507, 0x31);
622 regmap_write(lt9611->regmap, 0x8507, 0x37);
623 usleep_range(5000, 10000);
624
625 regmap_read(lt9611->regmap, 0x8540, &temp);
626
627 if (temp & KEY_DDC_ACCS_DONE) {
628 for (j = 0; j < EDID_LEN; j++) {
629 regmap_read(lt9611->regmap, 0x8583, &temp);
630 lt9611->edid_buf[i * EDID_LEN + j] = temp;
631 }
632
633 } else if (temp & DDC_NO_ACK) { /* DDC No Ack or Abitration lost */
634 dev_err(lt9611->dev, "read edid failed: no ack\n");
635 ret = -EIO;
636 goto end;
637
638 } else {
639 dev_err(lt9611->dev, "read edid failed: access not done\n");
640 ret = -EIO;
641 goto end;
642 }
643 }
644
645end:
646 regmap_write(lt9611->regmap, 0x8507, 0x1f);
647 return ret;
648}
649
650static int
651lt9611_get_edid_block(void *data, u8 *buf, unsigned int block, size_t len)
652{
653 struct lt9611 *lt9611 = data;
654 int ret;
655
656 if (len > 128)
657 return -EINVAL;
658
659 /* supports up to 1 extension block */
660 /* TODO: add support for more extension blocks */
661 if (block > 1)
662 return -EINVAL;
663
664 if (block == 0) {
665 ret = lt9611_read_edid(lt9611);
666 if (ret) {
667 dev_err(lt9611->dev, "edid read failed\n");
668 return ret;
669 }
670 }
671
672 block %= 2;
673 memcpy(buf, lt9611->edid_buf + (block * 128), len);
674
675 return 0;
676}
677
678static int lt9611_connector_get_modes(struct drm_connector *connector)
679{
680 struct lt9611 *lt9611 = connector_to_lt9611(connector);
681 unsigned int count;
682 struct edid *edid;
683
684 lt9611_power_on(lt9611);
685 edid = drm_do_get_edid(connector, lt9611_get_edid_block, lt9611);
686 drm_connector_update_edid_property(connector, edid);
687 count = drm_add_edid_modes(connector, edid);
688 kfree(edid);
689
690 return count;
691}
692
693static enum drm_mode_status
694lt9611_connector_mode_valid(struct drm_connector *connector,
695 struct drm_display_mode *mode)
696{
697 struct lt9611_mode *lt9611_mode = lt9611_find_mode(mode);
698
699 return lt9611_mode ? MODE_OK : MODE_BAD;
700}
701
702/* bridge funcs */
703static void lt9611_bridge_enable(struct drm_bridge *bridge)
704{
705 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
706
707 if (lt9611_power_on(lt9611)) {
708 dev_err(lt9611->dev, "power on failed\n");
709 return;
710 }
711
712 lt9611_mipi_input_analog(lt9611);
713 lt9611_hdmi_tx_digital(lt9611);
714 lt9611_hdmi_tx_phy(lt9611);
715
716 msleep(500);
717
718 lt9611_video_check(lt9611);
719
720 /* Enable HDMI output */
721 regmap_write(lt9611->regmap, 0x8130, 0xea);
722}
723
724static void lt9611_bridge_disable(struct drm_bridge *bridge)
725{
726 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
727 int ret;
728
729 /* Disable HDMI output */
730 ret = regmap_write(lt9611->regmap, 0x8130, 0x6a);
731 if (ret) {
732 dev_err(lt9611->dev, "video on failed\n");
733 return;
734 }
735
736 if (lt9611_power_off(lt9611)) {
737 dev_err(lt9611->dev, "power on failed\n");
738 return;
739 }
740}
741
742static struct
743drm_connector_helper_funcs lt9611_bridge_connector_helper_funcs = {
744 .get_modes = lt9611_connector_get_modes,
745 .mode_valid = lt9611_connector_mode_valid,
746};
747
748static const struct drm_connector_funcs lt9611_bridge_connector_funcs = {
749 .fill_modes = drm_helper_probe_single_connector_modes,
750 .detect = lt9611_connector_detect,
751 .destroy = drm_connector_cleanup,
752 .reset = drm_atomic_helper_connector_reset,
753 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
754 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
755};
756
757static struct mipi_dsi_device *lt9611_attach_dsi(struct lt9611 *lt9611,
758 struct device_node *dsi_node)
759{
760 const struct mipi_dsi_device_info info = { "lt9611", 0, NULL };
761 struct mipi_dsi_device *dsi;
762 struct mipi_dsi_host *host;
763 int ret;
764
765 host = of_find_mipi_dsi_host_by_node(dsi_node);
766 if (!host) {
767 dev_err(lt9611->dev, "failed to find dsi host\n");
768 return ERR_PTR(-EPROBE_DEFER);
769 }
770
771 dsi = mipi_dsi_device_register_full(host, &info);
772 if (IS_ERR(dsi)) {
773 dev_err(lt9611->dev, "failed to create dsi device\n");
774 return dsi;
775 }
776
777 dsi->lanes = 4;
778 dsi->format = MIPI_DSI_FMT_RGB888;
779 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
780 MIPI_DSI_MODE_VIDEO_HSE;
781
782 ret = mipi_dsi_attach(dsi);
783 if (ret < 0) {
784 dev_err(lt9611->dev, "failed to attach dsi to host\n");
785 mipi_dsi_device_unregister(dsi);
786 return ERR_PTR(ret);
787 }
788
789 return dsi;
790}
791
792static void lt9611_bridge_detach(struct drm_bridge *bridge)
793{
794 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
795
796 if (lt9611->dsi1) {
797 mipi_dsi_detach(lt9611->dsi1);
798 mipi_dsi_device_unregister(lt9611->dsi1);
799 }
800
801 mipi_dsi_detach(lt9611->dsi0);
802 mipi_dsi_device_unregister(lt9611->dsi0);
803}
804
805static int lt9611_connector_init(struct drm_bridge *bridge, struct lt9611 *lt9611)
806{
807 int ret;
808
809 ret = drm_connector_init(bridge->dev, <9611->connector,
810 <9611_bridge_connector_funcs,
811 DRM_MODE_CONNECTOR_HDMIA);
812 if (ret) {
813 DRM_ERROR("Failed to initialize connector with drm\n");
814 return ret;
815 }
816
817 drm_connector_helper_add(<9611->connector,
818 <9611_bridge_connector_helper_funcs);
819 drm_connector_attach_encoder(<9611->connector, bridge->encoder);
820
821 if (!bridge->encoder) {
822 DRM_ERROR("Parent encoder object not found");
823 return -ENODEV;
824 }
825
826 return 0;
827}
828
829static int lt9611_bridge_attach(struct drm_bridge *bridge,
830 enum drm_bridge_attach_flags flags)
831{
832 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
833 int ret;
834
835 if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
836 ret = lt9611_connector_init(bridge, lt9611);
837 if (ret < 0)
838 return ret;
839 }
840
841 /* Attach primary DSI */
842 lt9611->dsi0 = lt9611_attach_dsi(lt9611, lt9611->dsi0_node);
843 if (IS_ERR(lt9611->dsi0))
844 return PTR_ERR(lt9611->dsi0);
845
846 /* Attach secondary DSI, if specified */
847 if (lt9611->dsi1_node) {
848 lt9611->dsi1 = lt9611_attach_dsi(lt9611, lt9611->dsi1_node);
849 if (IS_ERR(lt9611->dsi1)) {
850 ret = PTR_ERR(lt9611->dsi1);
851 goto err_unregister_dsi0;
852 }
853 }
854
855 return 0;
856
857err_unregister_dsi0:
858 lt9611_bridge_detach(bridge);
859 drm_connector_cleanup(<9611->connector);
860 mipi_dsi_device_unregister(lt9611->dsi0);
861
862 return ret;
863}
864
865static enum drm_mode_status lt9611_bridge_mode_valid(struct drm_bridge *bridge,
866 const struct drm_display_info *info,
867 const struct drm_display_mode *mode)
868{
869 struct lt9611_mode *lt9611_mode = lt9611_find_mode(mode);
870 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
871
872 if (!lt9611_mode)
873 return MODE_BAD;
874 else if (lt9611_mode->intfs > 1 && !lt9611->dsi1)
875 return MODE_PANEL;
876 else
877 return MODE_OK;
878}
879
880static void lt9611_bridge_pre_enable(struct drm_bridge *bridge)
881{
882 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
883
884 if (!lt9611->sleep)
885 return;
886
887 lt9611_reset(lt9611);
888 regmap_write(lt9611->regmap, 0x80ee, 0x01);
889
890 lt9611->sleep = false;
891}
892
893static void lt9611_bridge_post_disable(struct drm_bridge *bridge)
894{
895 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
896
897 lt9611_sleep_setup(lt9611);
898}
899
900static void lt9611_bridge_mode_set(struct drm_bridge *bridge,
901 const struct drm_display_mode *mode,
902 const struct drm_display_mode *adj_mode)
903{
904 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
905 struct hdmi_avi_infoframe avi_frame;
906 int ret;
907
908 lt9611_bridge_pre_enable(bridge);
909
910 lt9611_mipi_input_digital(lt9611, mode);
911 lt9611_pll_setup(lt9611, mode);
912 lt9611_mipi_video_setup(lt9611, mode);
913 lt9611_pcr_setup(lt9611, mode);
914
915 ret = drm_hdmi_avi_infoframe_from_display_mode(&avi_frame,
916 <9611->connector,
917 mode);
918 if (!ret)
919 lt9611->vic = avi_frame.video_code;
920}
921
922static enum drm_connector_status lt9611_bridge_detect(struct drm_bridge *bridge)
923{
924 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
925 unsigned int reg_val = 0;
926 int connected;
927
928 regmap_read(lt9611->regmap, 0x825e, ®_val);
929 connected = reg_val & BIT(2);
930
931 lt9611->status = connected ? connector_status_connected :
932 connector_status_disconnected;
933
934 return lt9611->status;
935}
936
937static struct edid *lt9611_bridge_get_edid(struct drm_bridge *bridge,
938 struct drm_connector *connector)
939{
940 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
941
942 lt9611_power_on(lt9611);
943 return drm_do_get_edid(connector, lt9611_get_edid_block, lt9611);
944}
945
946static void lt9611_bridge_hpd_enable(struct drm_bridge *bridge)
947{
948 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
949
950 lt9611_enable_hpd_interrupts(lt9611);
951}
952
953static const struct drm_bridge_funcs lt9611_bridge_funcs = {
954 .attach = lt9611_bridge_attach,
955 .detach = lt9611_bridge_detach,
956 .mode_valid = lt9611_bridge_mode_valid,
957 .enable = lt9611_bridge_enable,
958 .disable = lt9611_bridge_disable,
959 .post_disable = lt9611_bridge_post_disable,
960 .mode_set = lt9611_bridge_mode_set,
961 .detect = lt9611_bridge_detect,
962 .get_edid = lt9611_bridge_get_edid,
963 .hpd_enable = lt9611_bridge_hpd_enable,
964};
965
966static int lt9611_parse_dt(struct device *dev,
967 struct lt9611 *lt9611)
968{
969 lt9611->dsi0_node = of_graph_get_remote_node(dev->of_node, 0, -1);
970 if (!lt9611->dsi0_node) {
971 dev_err(lt9611->dev, "failed to get remote node for primary dsi\n");
972 return -ENODEV;
973 }
974
975 lt9611->dsi1_node = of_graph_get_remote_node(dev->of_node, 1, -1);
976
977 lt9611->ac_mode = of_property_read_bool(dev->of_node, "lt,ac-mode");
978
979 return 0;
980}
981
982static int lt9611_gpio_init(struct lt9611 *lt9611)
983{
984 struct device *dev = lt9611->dev;
985
986 lt9611->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
987 if (IS_ERR(lt9611->reset_gpio)) {
988 dev_err(dev, "failed to acquire reset gpio\n");
989 return PTR_ERR(lt9611->reset_gpio);
990 }
991
992 lt9611->enable_gpio = devm_gpiod_get_optional(dev, "enable",
993 GPIOD_OUT_LOW);
994 if (IS_ERR(lt9611->enable_gpio)) {
995 dev_err(dev, "failed to acquire enable gpio\n");
996 return PTR_ERR(lt9611->enable_gpio);
997 }
998
999 return 0;
1000}
1001
1002static int lt9611_read_device_rev(struct lt9611 *lt9611)
1003{
1004 unsigned int rev;
1005 int ret;
1006
1007 regmap_write(lt9611->regmap, 0x80ee, 0x01);
1008 ret = regmap_read(lt9611->regmap, 0x8002, &rev);
1009 if (ret)
1010 dev_err(lt9611->dev, "failed to read revision: %d\n", ret);
1011 else
1012 dev_info(lt9611->dev, "LT9611 revision: 0x%x\n", rev);
1013
1014 return ret;
1015}
1016
1017static int lt9611_hdmi_hw_params(struct device *dev, void *data,
1018 struct hdmi_codec_daifmt *fmt,
1019 struct hdmi_codec_params *hparms)
1020{
1021 struct lt9611 *lt9611 = data;
1022
1023 if (hparms->sample_rate == 48000)
1024 regmap_write(lt9611->regmap, 0x840f, 0x2b);
1025 else if (hparms->sample_rate == 96000)
1026 regmap_write(lt9611->regmap, 0x840f, 0xab);
1027 else
1028 return -EINVAL;
1029
1030 regmap_write(lt9611->regmap, 0x8435, 0x00);
1031 regmap_write(lt9611->regmap, 0x8436, 0x18);
1032 regmap_write(lt9611->regmap, 0x8437, 0x00);
1033
1034 return 0;
1035}
1036
1037static int lt9611_audio_startup(struct device *dev, void *data)
1038{
1039 struct lt9611 *lt9611 = data;
1040
1041 regmap_write(lt9611->regmap, 0x82d6, 0x8c);
1042 regmap_write(lt9611->regmap, 0x82d7, 0x04);
1043
1044 regmap_write(lt9611->regmap, 0x8406, 0x08);
1045 regmap_write(lt9611->regmap, 0x8407, 0x10);
1046
1047 regmap_write(lt9611->regmap, 0x8434, 0xd5);
1048
1049 return 0;
1050}
1051
1052static void lt9611_audio_shutdown(struct device *dev, void *data)
1053{
1054 struct lt9611 *lt9611 = data;
1055
1056 regmap_write(lt9611->regmap, 0x8406, 0x00);
1057 regmap_write(lt9611->regmap, 0x8407, 0x00);
1058}
1059
1060static int lt9611_hdmi_i2s_get_dai_id(struct snd_soc_component *component,
1061 struct device_node *endpoint)
1062{
1063 struct of_endpoint of_ep;
1064 int ret;
1065
1066 ret = of_graph_parse_endpoint(endpoint, &of_ep);
1067 if (ret < 0)
1068 return ret;
1069
1070 /*
1071 * HDMI sound should be located as reg = <2>
1072 * Then, it is sound port 0
1073 */
1074 if (of_ep.port == 2)
1075 return 0;
1076
1077 return -EINVAL;
1078}
1079
1080static const struct hdmi_codec_ops lt9611_codec_ops = {
1081 .hw_params = lt9611_hdmi_hw_params,
1082 .audio_shutdown = lt9611_audio_shutdown,
1083 .audio_startup = lt9611_audio_startup,
1084 .get_dai_id = lt9611_hdmi_i2s_get_dai_id,
1085};
1086
1087static struct hdmi_codec_pdata codec_data = {
1088 .ops = <9611_codec_ops,
1089 .max_i2s_channels = 8,
1090 .i2s = 1,
1091};
1092
1093static int lt9611_audio_init(struct device *dev, struct lt9611 *lt9611)
1094{
1095 codec_data.data = lt9611;
1096 lt9611->audio_pdev =
1097 platform_device_register_data(dev, HDMI_CODEC_DRV_NAME,
1098 PLATFORM_DEVID_AUTO,
1099 &codec_data, sizeof(codec_data));
1100
1101 return PTR_ERR_OR_ZERO(lt9611->audio_pdev);
1102}
1103
1104static void lt9611_audio_exit(struct lt9611 *lt9611)
1105{
1106 if (lt9611->audio_pdev) {
1107 platform_device_unregister(lt9611->audio_pdev);
1108 lt9611->audio_pdev = NULL;
1109 }
1110}
1111
1112static int lt9611_probe(struct i2c_client *client,
1113 const struct i2c_device_id *id)
1114{
1115 struct lt9611 *lt9611;
1116 struct device *dev = &client->dev;
1117 int ret;
1118
1119 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
1120 dev_err(dev, "device doesn't support I2C\n");
1121 return -ENODEV;
1122 }
1123
1124 lt9611 = devm_kzalloc(dev, sizeof(*lt9611), GFP_KERNEL);
1125 if (!lt9611)
1126 return -ENOMEM;
1127
1128 lt9611->dev = &client->dev;
1129 lt9611->client = client;
1130 lt9611->sleep = false;
1131
1132 lt9611->regmap = devm_regmap_init_i2c(client, <9611_regmap_config);
1133 if (IS_ERR(lt9611->regmap)) {
1134 dev_err(lt9611->dev, "regmap i2c init failed\n");
1135 return PTR_ERR(lt9611->regmap);
1136 }
1137
1138 ret = lt9611_parse_dt(&client->dev, lt9611);
1139 if (ret) {
1140 dev_err(dev, "failed to parse device tree\n");
1141 return ret;
1142 }
1143
1144 ret = lt9611_gpio_init(lt9611);
1145 if (ret < 0)
1146 goto err_of_put;
1147
1148 ret = lt9611_regulator_init(lt9611);
1149 if (ret < 0)
1150 goto err_of_put;
1151
1152 lt9611_assert_5v(lt9611);
1153
1154 ret = lt9611_regulator_enable(lt9611);
1155 if (ret)
1156 goto err_of_put;
1157
1158 lt9611_reset(lt9611);
1159
1160 ret = lt9611_read_device_rev(lt9611);
1161 if (ret) {
1162 dev_err(dev, "failed to read chip rev\n");
1163 goto err_disable_regulators;
1164 }
1165
1166 ret = devm_request_threaded_irq(dev, client->irq, NULL,
1167 lt9611_irq_thread_handler,
1168 IRQF_ONESHOT, "lt9611", lt9611);
1169 if (ret) {
1170 dev_err(dev, "failed to request irq\n");
1171 goto err_disable_regulators;
1172 }
1173
1174 i2c_set_clientdata(client, lt9611);
1175
1176 lt9611->bridge.funcs = <9611_bridge_funcs;
1177 lt9611->bridge.of_node = client->dev.of_node;
1178 lt9611->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID |
1179 DRM_BRIDGE_OP_HPD | DRM_BRIDGE_OP_MODES;
1180 lt9611->bridge.type = DRM_MODE_CONNECTOR_HDMIA;
1181
1182 drm_bridge_add(<9611->bridge);
1183
1184 lt9611_enable_hpd_interrupts(lt9611);
1185
1186 return lt9611_audio_init(dev, lt9611);
1187
1188err_disable_regulators:
1189 regulator_bulk_disable(ARRAY_SIZE(lt9611->supplies), lt9611->supplies);
1190
1191err_of_put:
1192 of_node_put(lt9611->dsi1_node);
1193 of_node_put(lt9611->dsi0_node);
1194
1195 return ret;
1196}
1197
1198static int lt9611_remove(struct i2c_client *client)
1199{
1200 struct lt9611 *lt9611 = i2c_get_clientdata(client);
1201
1202 disable_irq(client->irq);
1203 lt9611_audio_exit(lt9611);
1204 drm_bridge_remove(<9611->bridge);
1205
1206 regulator_bulk_disable(ARRAY_SIZE(lt9611->supplies), lt9611->supplies);
1207
1208 of_node_put(lt9611->dsi1_node);
1209 of_node_put(lt9611->dsi0_node);
1210
1211 return 0;
1212}
1213
1214static struct i2c_device_id lt9611_id[] = {
1215 { "lontium,lt9611", 0 },
1216 {}
1217};
1218MODULE_DEVICE_TABLE(i2c, lt9611_id);
1219
1220static const struct of_device_id lt9611_match_table[] = {
1221 { .compatible = "lontium,lt9611" },
1222 { }
1223};
1224MODULE_DEVICE_TABLE(of, lt9611_match_table);
1225
1226static struct i2c_driver lt9611_driver = {
1227 .driver = {
1228 .name = "lt9611",
1229 .of_match_table = lt9611_match_table,
1230 },
1231 .probe = lt9611_probe,
1232 .remove = lt9611_remove,
1233 .id_table = lt9611_id,
1234};
1235module_i2c_driver(lt9611_driver);
1236
1237MODULE_LICENSE("GPL v2");