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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/firmware.h>
8#include <linux/gpio/consumer.h>
9#include <linux/interrupt.h>
10#include <linux/module.h>
11#include <linux/mutex.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#include <linux/wait.h>
17#include <linux/workqueue.h>
18
19#include <sound/hdmi-codec.h>
20
21#include <drm/drm_atomic_helper.h>
22#include <drm/drm_bridge.h>
23#include <drm/drm_mipi_dsi.h>
24#include <drm/drm_print.h>
25#include <drm/drm_probe_helper.h>
26
27#define EDID_BLOCK_SIZE 128
28#define EDID_NUM_BLOCKS 2
29
30struct lt9611uxc {
31 struct device *dev;
32 struct drm_bridge bridge;
33 struct drm_connector connector;
34
35 struct regmap *regmap;
36 /* Protects all accesses to registers by stopping the on-chip MCU */
37 struct mutex ocm_lock;
38
39 struct wait_queue_head wq;
40 struct work_struct work;
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 struct gpio_desc *reset_gpio;
49 struct gpio_desc *enable_gpio;
50
51 struct regulator_bulk_data supplies[2];
52
53 struct i2c_client *client;
54
55 bool hpd_supported;
56 bool edid_read;
57 /* can be accessed from different threads, so protect this with ocm_lock */
58 bool hdmi_connected;
59 uint8_t fw_version;
60};
61
62#define LT9611_PAGE_CONTROL 0xff
63
64static const struct regmap_range_cfg lt9611uxc_ranges[] = {
65 {
66 .name = "register_range",
67 .range_min = 0,
68 .range_max = 0xd0ff,
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 lt9611uxc_regmap_config = {
78 .reg_bits = 8,
79 .val_bits = 8,
80 .max_register = 0xffff,
81 .ranges = lt9611uxc_ranges,
82 .num_ranges = ARRAY_SIZE(lt9611uxc_ranges),
83};
84
85struct lt9611uxc_mode {
86 u16 hdisplay;
87 u16 vdisplay;
88 u8 vrefresh;
89};
90
91/*
92 * This chip supports only a fixed set of modes.
93 * Enumerate them here to check whether the mode is supported.
94 */
95static struct lt9611uxc_mode lt9611uxc_modes[] = {
96 { 1920, 1080, 60 },
97 { 1920, 1080, 30 },
98 { 1920, 1080, 25 },
99 { 1366, 768, 60 },
100 { 1360, 768, 60 },
101 { 1280, 1024, 60 },
102 { 1280, 800, 60 },
103 { 1280, 720, 60 },
104 { 1280, 720, 50 },
105 { 1280, 720, 30 },
106 { 1152, 864, 60 },
107 { 1024, 768, 60 },
108 { 800, 600, 60 },
109 { 720, 576, 50 },
110 { 720, 480, 60 },
111 { 640, 480, 60 },
112};
113
114static struct lt9611uxc *bridge_to_lt9611uxc(struct drm_bridge *bridge)
115{
116 return container_of(bridge, struct lt9611uxc, bridge);
117}
118
119static struct lt9611uxc *connector_to_lt9611uxc(struct drm_connector *connector)
120{
121 return container_of(connector, struct lt9611uxc, connector);
122}
123
124static void lt9611uxc_lock(struct lt9611uxc *lt9611uxc)
125{
126 mutex_lock(<9611uxc->ocm_lock);
127 regmap_write(lt9611uxc->regmap, 0x80ee, 0x01);
128}
129
130static void lt9611uxc_unlock(struct lt9611uxc *lt9611uxc)
131{
132 regmap_write(lt9611uxc->regmap, 0x80ee, 0x00);
133 msleep(50);
134 mutex_unlock(<9611uxc->ocm_lock);
135}
136
137static irqreturn_t lt9611uxc_irq_thread_handler(int irq, void *dev_id)
138{
139 struct lt9611uxc *lt9611uxc = dev_id;
140 unsigned int irq_status = 0;
141 unsigned int hpd_status = 0;
142
143 lt9611uxc_lock(lt9611uxc);
144
145 regmap_read(lt9611uxc->regmap, 0xb022, &irq_status);
146 regmap_read(lt9611uxc->regmap, 0xb023, &hpd_status);
147 if (irq_status)
148 regmap_write(lt9611uxc->regmap, 0xb022, 0);
149
150 if (irq_status & BIT(0)) {
151 lt9611uxc->edid_read = !!(hpd_status & BIT(0));
152 wake_up_all(<9611uxc->wq);
153 }
154
155 if (irq_status & BIT(1)) {
156 lt9611uxc->hdmi_connected = hpd_status & BIT(1);
157 schedule_work(<9611uxc->work);
158 }
159
160 lt9611uxc_unlock(lt9611uxc);
161
162 return IRQ_HANDLED;
163}
164
165static void lt9611uxc_hpd_work(struct work_struct *work)
166{
167 struct lt9611uxc *lt9611uxc = container_of(work, struct lt9611uxc, work);
168 bool connected;
169
170 if (lt9611uxc->connector.dev)
171 drm_kms_helper_hotplug_event(lt9611uxc->connector.dev);
172 else {
173
174 mutex_lock(<9611uxc->ocm_lock);
175 connected = lt9611uxc->hdmi_connected;
176 mutex_unlock(<9611uxc->ocm_lock);
177
178 drm_bridge_hpd_notify(<9611uxc->bridge,
179 connected ?
180 connector_status_connected :
181 connector_status_disconnected);
182 }
183}
184
185static void lt9611uxc_reset(struct lt9611uxc *lt9611uxc)
186{
187 gpiod_set_value_cansleep(lt9611uxc->reset_gpio, 1);
188 msleep(20);
189
190 gpiod_set_value_cansleep(lt9611uxc->reset_gpio, 0);
191 msleep(20);
192
193 gpiod_set_value_cansleep(lt9611uxc->reset_gpio, 1);
194 msleep(300);
195}
196
197static void lt9611uxc_assert_5v(struct lt9611uxc *lt9611uxc)
198{
199 if (!lt9611uxc->enable_gpio)
200 return;
201
202 gpiod_set_value_cansleep(lt9611uxc->enable_gpio, 1);
203 msleep(20);
204}
205
206static int lt9611uxc_regulator_init(struct lt9611uxc *lt9611uxc)
207{
208 int ret;
209
210 lt9611uxc->supplies[0].supply = "vdd";
211 lt9611uxc->supplies[1].supply = "vcc";
212
213 ret = devm_regulator_bulk_get(lt9611uxc->dev, 2, lt9611uxc->supplies);
214 if (ret < 0)
215 return ret;
216
217 return regulator_set_load(lt9611uxc->supplies[0].consumer, 200000);
218}
219
220static int lt9611uxc_regulator_enable(struct lt9611uxc *lt9611uxc)
221{
222 int ret;
223
224 ret = regulator_enable(lt9611uxc->supplies[0].consumer);
225 if (ret < 0)
226 return ret;
227
228 usleep_range(1000, 10000); /* 50000 according to dtsi */
229
230 ret = regulator_enable(lt9611uxc->supplies[1].consumer);
231 if (ret < 0) {
232 regulator_disable(lt9611uxc->supplies[0].consumer);
233 return ret;
234 }
235
236 return 0;
237}
238
239static struct lt9611uxc_mode *lt9611uxc_find_mode(const struct drm_display_mode *mode)
240{
241 int i;
242
243 for (i = 0; i < ARRAY_SIZE(lt9611uxc_modes); i++) {
244 if (lt9611uxc_modes[i].hdisplay == mode->hdisplay &&
245 lt9611uxc_modes[i].vdisplay == mode->vdisplay &&
246 lt9611uxc_modes[i].vrefresh == drm_mode_vrefresh(mode)) {
247 return <9611uxc_modes[i];
248 }
249 }
250
251 return NULL;
252}
253
254static struct mipi_dsi_device *lt9611uxc_attach_dsi(struct lt9611uxc *lt9611uxc,
255 struct device_node *dsi_node)
256{
257 const struct mipi_dsi_device_info info = { "lt9611uxc", 0, NULL };
258 struct mipi_dsi_device *dsi;
259 struct mipi_dsi_host *host;
260 int ret;
261
262 host = of_find_mipi_dsi_host_by_node(dsi_node);
263 if (!host) {
264 dev_err(lt9611uxc->dev, "failed to find dsi host\n");
265 return ERR_PTR(-EPROBE_DEFER);
266 }
267
268 dsi = mipi_dsi_device_register_full(host, &info);
269 if (IS_ERR(dsi)) {
270 dev_err(lt9611uxc->dev, "failed to create dsi device\n");
271 return dsi;
272 }
273
274 dsi->lanes = 4;
275 dsi->format = MIPI_DSI_FMT_RGB888;
276 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
277 MIPI_DSI_MODE_VIDEO_HSE;
278
279 ret = mipi_dsi_attach(dsi);
280 if (ret < 0) {
281 dev_err(lt9611uxc->dev, "failed to attach dsi to host\n");
282 mipi_dsi_device_unregister(dsi);
283 return ERR_PTR(ret);
284 }
285
286 return dsi;
287}
288
289static int lt9611uxc_connector_get_modes(struct drm_connector *connector)
290{
291 struct lt9611uxc *lt9611uxc = connector_to_lt9611uxc(connector);
292 unsigned int count;
293 struct edid *edid;
294
295 edid = lt9611uxc->bridge.funcs->get_edid(<9611uxc->bridge, connector);
296 drm_connector_update_edid_property(connector, edid);
297 count = drm_add_edid_modes(connector, edid);
298 kfree(edid);
299
300 return count;
301}
302
303static enum drm_connector_status lt9611uxc_connector_detect(struct drm_connector *connector,
304 bool force)
305{
306 struct lt9611uxc *lt9611uxc = connector_to_lt9611uxc(connector);
307
308 return lt9611uxc->bridge.funcs->detect(<9611uxc->bridge);
309}
310
311static enum drm_mode_status lt9611uxc_connector_mode_valid(struct drm_connector *connector,
312 struct drm_display_mode *mode)
313{
314 struct lt9611uxc_mode *lt9611uxc_mode = lt9611uxc_find_mode(mode);
315
316 return lt9611uxc_mode ? MODE_OK : MODE_BAD;
317}
318
319static const struct drm_connector_helper_funcs lt9611uxc_bridge_connector_helper_funcs = {
320 .get_modes = lt9611uxc_connector_get_modes,
321 .mode_valid = lt9611uxc_connector_mode_valid,
322};
323
324static const struct drm_connector_funcs lt9611uxc_bridge_connector_funcs = {
325 .fill_modes = drm_helper_probe_single_connector_modes,
326 .detect = lt9611uxc_connector_detect,
327 .destroy = drm_connector_cleanup,
328 .reset = drm_atomic_helper_connector_reset,
329 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
330 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
331};
332
333static int lt9611uxc_connector_init(struct drm_bridge *bridge, struct lt9611uxc *lt9611uxc)
334{
335 int ret;
336
337 if (!bridge->encoder) {
338 DRM_ERROR("Parent encoder object not found");
339 return -ENODEV;
340 }
341
342 drm_connector_helper_add(<9611uxc->connector,
343 <9611uxc_bridge_connector_helper_funcs);
344 ret = drm_connector_init(bridge->dev, <9611uxc->connector,
345 <9611uxc_bridge_connector_funcs,
346 DRM_MODE_CONNECTOR_HDMIA);
347 if (ret) {
348 DRM_ERROR("Failed to initialize connector with drm\n");
349 return ret;
350 }
351
352 return drm_connector_attach_encoder(<9611uxc->connector, bridge->encoder);
353}
354
355static void lt9611uxc_bridge_detach(struct drm_bridge *bridge)
356{
357 struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge);
358
359 if (lt9611uxc->dsi1) {
360 mipi_dsi_detach(lt9611uxc->dsi1);
361 mipi_dsi_device_unregister(lt9611uxc->dsi1);
362 }
363
364 mipi_dsi_detach(lt9611uxc->dsi0);
365 mipi_dsi_device_unregister(lt9611uxc->dsi0);
366}
367
368static int lt9611uxc_bridge_attach(struct drm_bridge *bridge,
369 enum drm_bridge_attach_flags flags)
370{
371 struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge);
372 int ret;
373
374 if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
375 ret = lt9611uxc_connector_init(bridge, lt9611uxc);
376 if (ret < 0)
377 return ret;
378 }
379
380 /* Attach primary DSI */
381 lt9611uxc->dsi0 = lt9611uxc_attach_dsi(lt9611uxc, lt9611uxc->dsi0_node);
382 if (IS_ERR(lt9611uxc->dsi0))
383 return PTR_ERR(lt9611uxc->dsi0);
384
385 /* Attach secondary DSI, if specified */
386 if (lt9611uxc->dsi1_node) {
387 lt9611uxc->dsi1 = lt9611uxc_attach_dsi(lt9611uxc, lt9611uxc->dsi1_node);
388 if (IS_ERR(lt9611uxc->dsi1)) {
389 ret = PTR_ERR(lt9611uxc->dsi1);
390 goto err_unregister_dsi0;
391 }
392 }
393
394 return 0;
395
396err_unregister_dsi0:
397 mipi_dsi_detach(lt9611uxc->dsi0);
398 mipi_dsi_device_unregister(lt9611uxc->dsi0);
399
400 return ret;
401}
402
403static enum drm_mode_status
404lt9611uxc_bridge_mode_valid(struct drm_bridge *bridge,
405 const struct drm_display_info *info,
406 const struct drm_display_mode *mode)
407{
408 struct lt9611uxc_mode *lt9611uxc_mode;
409
410 lt9611uxc_mode = lt9611uxc_find_mode(mode);
411
412 return lt9611uxc_mode ? MODE_OK : MODE_BAD;
413}
414
415static void lt9611uxc_video_setup(struct lt9611uxc *lt9611uxc,
416 const struct drm_display_mode *mode)
417{
418 u32 h_total, hactive, hsync_len, hfront_porch;
419 u32 v_total, vactive, vsync_len, vfront_porch;
420
421 h_total = mode->htotal;
422 v_total = mode->vtotal;
423
424 hactive = mode->hdisplay;
425 hsync_len = mode->hsync_end - mode->hsync_start;
426 hfront_porch = mode->hsync_start - mode->hdisplay;
427
428 vactive = mode->vdisplay;
429 vsync_len = mode->vsync_end - mode->vsync_start;
430 vfront_porch = mode->vsync_start - mode->vdisplay;
431
432 regmap_write(lt9611uxc->regmap, 0xd00d, (u8)(v_total / 256));
433 regmap_write(lt9611uxc->regmap, 0xd00e, (u8)(v_total % 256));
434
435 regmap_write(lt9611uxc->regmap, 0xd00f, (u8)(vactive / 256));
436 regmap_write(lt9611uxc->regmap, 0xd010, (u8)(vactive % 256));
437
438 regmap_write(lt9611uxc->regmap, 0xd011, (u8)(h_total / 256));
439 regmap_write(lt9611uxc->regmap, 0xd012, (u8)(h_total % 256));
440
441 regmap_write(lt9611uxc->regmap, 0xd013, (u8)(hactive / 256));
442 regmap_write(lt9611uxc->regmap, 0xd014, (u8)(hactive % 256));
443
444 regmap_write(lt9611uxc->regmap, 0xd015, (u8)(vsync_len % 256));
445
446 regmap_update_bits(lt9611uxc->regmap, 0xd016, 0xf, (u8)(hsync_len / 256));
447 regmap_write(lt9611uxc->regmap, 0xd017, (u8)(hsync_len % 256));
448
449 regmap_update_bits(lt9611uxc->regmap, 0xd018, 0xf, (u8)(vfront_porch / 256));
450 regmap_write(lt9611uxc->regmap, 0xd019, (u8)(vfront_porch % 256));
451
452 regmap_update_bits(lt9611uxc->regmap, 0xd01a, 0xf, (u8)(hfront_porch / 256));
453 regmap_write(lt9611uxc->regmap, 0xd01b, (u8)(hfront_porch % 256));
454}
455
456static void lt9611uxc_bridge_mode_set(struct drm_bridge *bridge,
457 const struct drm_display_mode *mode,
458 const struct drm_display_mode *adj_mode)
459{
460 struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge);
461
462 lt9611uxc_lock(lt9611uxc);
463 lt9611uxc_video_setup(lt9611uxc, mode);
464 lt9611uxc_unlock(lt9611uxc);
465}
466
467static enum drm_connector_status lt9611uxc_bridge_detect(struct drm_bridge *bridge)
468{
469 struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge);
470 unsigned int reg_val = 0;
471 int ret;
472 bool connected = true;
473
474 lt9611uxc_lock(lt9611uxc);
475
476 if (lt9611uxc->hpd_supported) {
477 ret = regmap_read(lt9611uxc->regmap, 0xb023, ®_val);
478
479 if (ret)
480 dev_err(lt9611uxc->dev, "failed to read hpd status: %d\n", ret);
481 else
482 connected = reg_val & BIT(1);
483 }
484 lt9611uxc->hdmi_connected = connected;
485
486 lt9611uxc_unlock(lt9611uxc);
487
488 return connected ? connector_status_connected :
489 connector_status_disconnected;
490}
491
492static int lt9611uxc_wait_for_edid(struct lt9611uxc *lt9611uxc)
493{
494 return wait_event_interruptible_timeout(lt9611uxc->wq, lt9611uxc->edid_read,
495 msecs_to_jiffies(500));
496}
497
498static int lt9611uxc_get_edid_block(void *data, u8 *buf, unsigned int block, size_t len)
499{
500 struct lt9611uxc *lt9611uxc = data;
501 int ret;
502
503 if (len > EDID_BLOCK_SIZE)
504 return -EINVAL;
505
506 if (block >= EDID_NUM_BLOCKS)
507 return -EINVAL;
508
509 lt9611uxc_lock(lt9611uxc);
510
511 regmap_write(lt9611uxc->regmap, 0xb00b, 0x10);
512
513 regmap_write(lt9611uxc->regmap, 0xb00a, block * EDID_BLOCK_SIZE);
514
515 ret = regmap_noinc_read(lt9611uxc->regmap, 0xb0b0, buf, len);
516 if (ret)
517 dev_err(lt9611uxc->dev, "edid read failed: %d\n", ret);
518
519 lt9611uxc_unlock(lt9611uxc);
520
521 return 0;
522};
523
524static struct edid *lt9611uxc_bridge_get_edid(struct drm_bridge *bridge,
525 struct drm_connector *connector)
526{
527 struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge);
528 int ret;
529
530 ret = lt9611uxc_wait_for_edid(lt9611uxc);
531 if (ret < 0) {
532 dev_err(lt9611uxc->dev, "wait for EDID failed: %d\n", ret);
533 return NULL;
534 } else if (ret == 0) {
535 dev_err(lt9611uxc->dev, "wait for EDID timeout\n");
536 return NULL;
537 }
538
539 return drm_do_get_edid(connector, lt9611uxc_get_edid_block, lt9611uxc);
540}
541
542static const struct drm_bridge_funcs lt9611uxc_bridge_funcs = {
543 .attach = lt9611uxc_bridge_attach,
544 .detach = lt9611uxc_bridge_detach,
545 .mode_valid = lt9611uxc_bridge_mode_valid,
546 .mode_set = lt9611uxc_bridge_mode_set,
547 .detect = lt9611uxc_bridge_detect,
548 .get_edid = lt9611uxc_bridge_get_edid,
549};
550
551static int lt9611uxc_parse_dt(struct device *dev,
552 struct lt9611uxc *lt9611uxc)
553{
554 lt9611uxc->dsi0_node = of_graph_get_remote_node(dev->of_node, 0, -1);
555 if (!lt9611uxc->dsi0_node) {
556 dev_err(lt9611uxc->dev, "failed to get remote node for primary dsi\n");
557 return -ENODEV;
558 }
559
560 lt9611uxc->dsi1_node = of_graph_get_remote_node(dev->of_node, 1, -1);
561
562 return 0;
563}
564
565static int lt9611uxc_gpio_init(struct lt9611uxc *lt9611uxc)
566{
567 struct device *dev = lt9611uxc->dev;
568
569 lt9611uxc->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
570 if (IS_ERR(lt9611uxc->reset_gpio)) {
571 dev_err(dev, "failed to acquire reset gpio\n");
572 return PTR_ERR(lt9611uxc->reset_gpio);
573 }
574
575 lt9611uxc->enable_gpio = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_LOW);
576 if (IS_ERR(lt9611uxc->enable_gpio)) {
577 dev_err(dev, "failed to acquire enable gpio\n");
578 return PTR_ERR(lt9611uxc->enable_gpio);
579 }
580
581 return 0;
582}
583
584static int lt9611uxc_read_device_rev(struct lt9611uxc *lt9611uxc)
585{
586 unsigned int rev0, rev1, rev2;
587 int ret;
588
589 lt9611uxc_lock(lt9611uxc);
590
591 ret = regmap_read(lt9611uxc->regmap, 0x8100, &rev0);
592 ret |= regmap_read(lt9611uxc->regmap, 0x8101, &rev1);
593 ret |= regmap_read(lt9611uxc->regmap, 0x8102, &rev2);
594 if (ret)
595 dev_err(lt9611uxc->dev, "failed to read revision: %d\n", ret);
596 else
597 dev_info(lt9611uxc->dev, "LT9611 revision: 0x%02x.%02x.%02x\n", rev0, rev1, rev2);
598
599 lt9611uxc_unlock(lt9611uxc);
600
601 return ret;
602}
603
604static int lt9611uxc_read_version(struct lt9611uxc *lt9611uxc)
605{
606 unsigned int rev;
607 int ret;
608
609 lt9611uxc_lock(lt9611uxc);
610
611 ret = regmap_read(lt9611uxc->regmap, 0xb021, &rev);
612 if (ret)
613 dev_err(lt9611uxc->dev, "failed to read revision: %d\n", ret);
614 else
615 dev_info(lt9611uxc->dev, "LT9611 version: 0x%02x\n", rev);
616
617 lt9611uxc_unlock(lt9611uxc);
618
619 return ret < 0 ? ret : rev;
620}
621
622static int lt9611uxc_hdmi_hw_params(struct device *dev, void *data,
623 struct hdmi_codec_daifmt *fmt,
624 struct hdmi_codec_params *hparms)
625{
626 /*
627 * LT9611UXC will automatically detect rate and sample size, so no need
628 * to setup anything here.
629 */
630 return 0;
631}
632
633static void lt9611uxc_audio_shutdown(struct device *dev, void *data)
634{
635}
636
637static int lt9611uxc_hdmi_i2s_get_dai_id(struct snd_soc_component *component,
638 struct device_node *endpoint)
639{
640 struct of_endpoint of_ep;
641 int ret;
642
643 ret = of_graph_parse_endpoint(endpoint, &of_ep);
644 if (ret < 0)
645 return ret;
646
647 /*
648 * HDMI sound should be located as reg = <2>
649 * Then, it is sound port 0
650 */
651 if (of_ep.port == 2)
652 return 0;
653
654 return -EINVAL;
655}
656
657static const struct hdmi_codec_ops lt9611uxc_codec_ops = {
658 .hw_params = lt9611uxc_hdmi_hw_params,
659 .audio_shutdown = lt9611uxc_audio_shutdown,
660 .get_dai_id = lt9611uxc_hdmi_i2s_get_dai_id,
661};
662
663static int lt9611uxc_audio_init(struct device *dev, struct lt9611uxc *lt9611uxc)
664{
665 struct hdmi_codec_pdata codec_data = {
666 .ops = <9611uxc_codec_ops,
667 .max_i2s_channels = 2,
668 .i2s = 1,
669 .data = lt9611uxc,
670 };
671
672 lt9611uxc->audio_pdev =
673 platform_device_register_data(dev, HDMI_CODEC_DRV_NAME,
674 PLATFORM_DEVID_AUTO,
675 &codec_data, sizeof(codec_data));
676
677 return PTR_ERR_OR_ZERO(lt9611uxc->audio_pdev);
678}
679
680static void lt9611uxc_audio_exit(struct lt9611uxc *lt9611uxc)
681{
682 if (lt9611uxc->audio_pdev) {
683 platform_device_unregister(lt9611uxc->audio_pdev);
684 lt9611uxc->audio_pdev = NULL;
685 }
686}
687
688#define LT9611UXC_FW_PAGE_SIZE 32
689static void lt9611uxc_firmware_write_page(struct lt9611uxc *lt9611uxc, u16 addr, const u8 *buf)
690{
691 struct reg_sequence seq_write_prepare[] = {
692 REG_SEQ0(0x805a, 0x04),
693 REG_SEQ0(0x805a, 0x00),
694
695 REG_SEQ0(0x805e, 0xdf),
696 REG_SEQ0(0x805a, 0x20),
697 REG_SEQ0(0x805a, 0x00),
698 REG_SEQ0(0x8058, 0x21),
699 };
700
701 struct reg_sequence seq_write_addr[] = {
702 REG_SEQ0(0x805b, (addr >> 16) & 0xff),
703 REG_SEQ0(0x805c, (addr >> 8) & 0xff),
704 REG_SEQ0(0x805d, addr & 0xff),
705 REG_SEQ0(0x805a, 0x10),
706 REG_SEQ0(0x805a, 0x00),
707 };
708
709 regmap_write(lt9611uxc->regmap, 0x8108, 0xbf);
710 msleep(20);
711 regmap_write(lt9611uxc->regmap, 0x8108, 0xff);
712 msleep(20);
713 regmap_multi_reg_write(lt9611uxc->regmap, seq_write_prepare, ARRAY_SIZE(seq_write_prepare));
714 regmap_noinc_write(lt9611uxc->regmap, 0x8059, buf, LT9611UXC_FW_PAGE_SIZE);
715 regmap_multi_reg_write(lt9611uxc->regmap, seq_write_addr, ARRAY_SIZE(seq_write_addr));
716 msleep(20);
717}
718
719static void lt9611uxc_firmware_read_page(struct lt9611uxc *lt9611uxc, u16 addr, char *buf)
720{
721 struct reg_sequence seq_read_page[] = {
722 REG_SEQ0(0x805a, 0xa0),
723 REG_SEQ0(0x805a, 0x80),
724 REG_SEQ0(0x805b, (addr >> 16) & 0xff),
725 REG_SEQ0(0x805c, (addr >> 8) & 0xff),
726 REG_SEQ0(0x805d, addr & 0xff),
727 REG_SEQ0(0x805a, 0x90),
728 REG_SEQ0(0x805a, 0x80),
729 REG_SEQ0(0x8058, 0x21),
730 };
731
732 regmap_multi_reg_write(lt9611uxc->regmap, seq_read_page, ARRAY_SIZE(seq_read_page));
733 regmap_noinc_read(lt9611uxc->regmap, 0x805f, buf, LT9611UXC_FW_PAGE_SIZE);
734}
735
736static char *lt9611uxc_firmware_read(struct lt9611uxc *lt9611uxc, size_t size)
737{
738 struct reg_sequence seq_read_setup[] = {
739 REG_SEQ0(0x805a, 0x84),
740 REG_SEQ0(0x805a, 0x80),
741 };
742
743 char *readbuf;
744 u16 offset;
745
746 readbuf = kzalloc(ALIGN(size, 32), GFP_KERNEL);
747 if (!readbuf)
748 return NULL;
749
750 regmap_multi_reg_write(lt9611uxc->regmap, seq_read_setup, ARRAY_SIZE(seq_read_setup));
751
752 for (offset = 0;
753 offset < size;
754 offset += LT9611UXC_FW_PAGE_SIZE)
755 lt9611uxc_firmware_read_page(lt9611uxc, offset, &readbuf[offset]);
756
757 return readbuf;
758}
759
760static int lt9611uxc_firmware_update(struct lt9611uxc *lt9611uxc)
761{
762 int ret;
763 u16 offset;
764 size_t remain;
765 char *readbuf;
766 const struct firmware *fw;
767
768 struct reg_sequence seq_setup[] = {
769 REG_SEQ0(0x805e, 0xdf),
770 REG_SEQ0(0x8058, 0x00),
771 REG_SEQ0(0x8059, 0x50),
772 REG_SEQ0(0x805a, 0x10),
773 REG_SEQ0(0x805a, 0x00),
774 };
775
776
777 struct reg_sequence seq_block_erase[] = {
778 REG_SEQ0(0x805a, 0x04),
779 REG_SEQ0(0x805a, 0x00),
780 REG_SEQ0(0x805b, 0x00),
781 REG_SEQ0(0x805c, 0x00),
782 REG_SEQ0(0x805d, 0x00),
783 REG_SEQ0(0x805a, 0x01),
784 REG_SEQ0(0x805a, 0x00),
785 };
786
787 ret = request_firmware(&fw, "lt9611uxc_fw.bin", lt9611uxc->dev);
788 if (ret < 0)
789 return ret;
790
791 dev_info(lt9611uxc->dev, "Updating firmware\n");
792 lt9611uxc_lock(lt9611uxc);
793
794 regmap_multi_reg_write(lt9611uxc->regmap, seq_setup, ARRAY_SIZE(seq_setup));
795
796 /*
797 * Need erase block 2 timess here. Sometimes, block erase can fail.
798 * This is a workaroud.
799 */
800 regmap_multi_reg_write(lt9611uxc->regmap, seq_block_erase, ARRAY_SIZE(seq_block_erase));
801 msleep(3000);
802 regmap_multi_reg_write(lt9611uxc->regmap, seq_block_erase, ARRAY_SIZE(seq_block_erase));
803 msleep(3000);
804
805 for (offset = 0, remain = fw->size;
806 remain >= LT9611UXC_FW_PAGE_SIZE;
807 offset += LT9611UXC_FW_PAGE_SIZE, remain -= LT9611UXC_FW_PAGE_SIZE)
808 lt9611uxc_firmware_write_page(lt9611uxc, offset, fw->data + offset);
809
810 if (remain > 0) {
811 char buf[LT9611UXC_FW_PAGE_SIZE];
812
813 memset(buf, 0xff, LT9611UXC_FW_PAGE_SIZE);
814 memcpy(buf, fw->data + offset, remain);
815 lt9611uxc_firmware_write_page(lt9611uxc, offset, buf);
816 }
817 msleep(20);
818
819 readbuf = lt9611uxc_firmware_read(lt9611uxc, fw->size);
820 if (!readbuf) {
821 ret = -ENOMEM;
822 goto out;
823 }
824
825 if (!memcmp(readbuf, fw->data, fw->size)) {
826 dev_err(lt9611uxc->dev, "Firmware update failed\n");
827 print_hex_dump(KERN_ERR, "fw: ", DUMP_PREFIX_OFFSET, 16, 1, readbuf, fw->size, false);
828 ret = -EINVAL;
829 } else {
830 dev_info(lt9611uxc->dev, "Firmware updates successfully\n");
831 ret = 0;
832 }
833 kfree(readbuf);
834
835out:
836 lt9611uxc_unlock(lt9611uxc);
837 lt9611uxc_reset(lt9611uxc);
838 release_firmware(fw);
839
840 return ret;
841}
842
843static ssize_t lt9611uxc_firmware_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t len)
844{
845 struct lt9611uxc *lt9611uxc = dev_get_drvdata(dev);
846 int ret;
847
848 ret = lt9611uxc_firmware_update(lt9611uxc);
849 if (ret < 0)
850 return ret;
851 return len;
852}
853
854static ssize_t lt9611uxc_firmware_show(struct device *dev, struct device_attribute *attr, char *buf)
855{
856 struct lt9611uxc *lt9611uxc = dev_get_drvdata(dev);
857
858 return sysfs_emit(buf, "%02x\n", lt9611uxc->fw_version);
859}
860
861static DEVICE_ATTR_RW(lt9611uxc_firmware);
862
863static struct attribute *lt9611uxc_attrs[] = {
864 &dev_attr_lt9611uxc_firmware.attr,
865 NULL,
866};
867
868static const struct attribute_group lt9611uxc_attr_group = {
869 .attrs = lt9611uxc_attrs,
870};
871
872static const struct attribute_group *lt9611uxc_attr_groups[] = {
873 <9611uxc_attr_group,
874 NULL,
875};
876
877static int lt9611uxc_probe(struct i2c_client *client,
878 const struct i2c_device_id *id)
879{
880 struct lt9611uxc *lt9611uxc;
881 struct device *dev = &client->dev;
882 int ret;
883 bool fw_updated = false;
884
885 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
886 dev_err(dev, "device doesn't support I2C\n");
887 return -ENODEV;
888 }
889
890 lt9611uxc = devm_kzalloc(dev, sizeof(*lt9611uxc), GFP_KERNEL);
891 if (!lt9611uxc)
892 return -ENOMEM;
893
894 lt9611uxc->dev = &client->dev;
895 lt9611uxc->client = client;
896 mutex_init(<9611uxc->ocm_lock);
897
898 lt9611uxc->regmap = devm_regmap_init_i2c(client, <9611uxc_regmap_config);
899 if (IS_ERR(lt9611uxc->regmap)) {
900 dev_err(lt9611uxc->dev, "regmap i2c init failed\n");
901 return PTR_ERR(lt9611uxc->regmap);
902 }
903
904 ret = lt9611uxc_parse_dt(&client->dev, lt9611uxc);
905 if (ret) {
906 dev_err(dev, "failed to parse device tree\n");
907 return ret;
908 }
909
910 ret = lt9611uxc_gpio_init(lt9611uxc);
911 if (ret < 0)
912 goto err_of_put;
913
914 ret = lt9611uxc_regulator_init(lt9611uxc);
915 if (ret < 0)
916 goto err_of_put;
917
918 lt9611uxc_assert_5v(lt9611uxc);
919
920 ret = lt9611uxc_regulator_enable(lt9611uxc);
921 if (ret)
922 goto err_of_put;
923
924 lt9611uxc_reset(lt9611uxc);
925
926 ret = lt9611uxc_read_device_rev(lt9611uxc);
927 if (ret) {
928 dev_err(dev, "failed to read chip rev\n");
929 goto err_disable_regulators;
930 }
931
932retry:
933 ret = lt9611uxc_read_version(lt9611uxc);
934 if (ret < 0) {
935 dev_err(dev, "failed to read FW version\n");
936 goto err_disable_regulators;
937 } else if (ret == 0) {
938 if (!fw_updated) {
939 fw_updated = true;
940 dev_err(dev, "FW version 0, enforcing firmware update\n");
941 ret = lt9611uxc_firmware_update(lt9611uxc);
942 if (ret < 0)
943 goto err_disable_regulators;
944 else
945 goto retry;
946 } else {
947 dev_err(dev, "FW version 0, update failed\n");
948 ret = -EOPNOTSUPP;
949 goto err_disable_regulators;
950 }
951 } else if (ret < 0x40) {
952 dev_info(dev, "FW version 0x%x, HPD not supported\n", ret);
953 } else {
954 lt9611uxc->hpd_supported = true;
955 }
956 lt9611uxc->fw_version = ret;
957
958 init_waitqueue_head(<9611uxc->wq);
959 INIT_WORK(<9611uxc->work, lt9611uxc_hpd_work);
960
961 ret = devm_request_threaded_irq(dev, client->irq, NULL,
962 lt9611uxc_irq_thread_handler,
963 IRQF_ONESHOT, "lt9611uxc", lt9611uxc);
964 if (ret) {
965 dev_err(dev, "failed to request irq\n");
966 goto err_disable_regulators;
967 }
968
969 i2c_set_clientdata(client, lt9611uxc);
970
971 lt9611uxc->bridge.funcs = <9611uxc_bridge_funcs;
972 lt9611uxc->bridge.of_node = client->dev.of_node;
973 lt9611uxc->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID;
974 if (lt9611uxc->hpd_supported)
975 lt9611uxc->bridge.ops |= DRM_BRIDGE_OP_HPD;
976 lt9611uxc->bridge.type = DRM_MODE_CONNECTOR_HDMIA;
977
978 drm_bridge_add(<9611uxc->bridge);
979
980 return lt9611uxc_audio_init(dev, lt9611uxc);
981
982err_disable_regulators:
983 regulator_bulk_disable(ARRAY_SIZE(lt9611uxc->supplies), lt9611uxc->supplies);
984
985err_of_put:
986 of_node_put(lt9611uxc->dsi1_node);
987 of_node_put(lt9611uxc->dsi0_node);
988
989 return ret;
990}
991
992static int lt9611uxc_remove(struct i2c_client *client)
993{
994 struct lt9611uxc *lt9611uxc = i2c_get_clientdata(client);
995
996 disable_irq(client->irq);
997 flush_scheduled_work();
998 lt9611uxc_audio_exit(lt9611uxc);
999 drm_bridge_remove(<9611uxc->bridge);
1000
1001 mutex_destroy(<9611uxc->ocm_lock);
1002
1003 regulator_bulk_disable(ARRAY_SIZE(lt9611uxc->supplies), lt9611uxc->supplies);
1004
1005 of_node_put(lt9611uxc->dsi1_node);
1006 of_node_put(lt9611uxc->dsi0_node);
1007
1008 return 0;
1009}
1010
1011static struct i2c_device_id lt9611uxc_id[] = {
1012 { "lontium,lt9611uxc", 0 },
1013 { /* sentinel */ }
1014};
1015
1016static const struct of_device_id lt9611uxc_match_table[] = {
1017 { .compatible = "lontium,lt9611uxc" },
1018 { /* sentinel */ }
1019};
1020MODULE_DEVICE_TABLE(of, lt9611uxc_match_table);
1021
1022static struct i2c_driver lt9611uxc_driver = {
1023 .driver = {
1024 .name = "lt9611uxc",
1025 .of_match_table = lt9611uxc_match_table,
1026 .dev_groups = lt9611uxc_attr_groups,
1027 },
1028 .probe = lt9611uxc_probe,
1029 .remove = lt9611uxc_remove,
1030 .id_table = lt9611uxc_id,
1031};
1032module_i2c_driver(lt9611uxc_driver);
1033
1034MODULE_AUTHOR("Dmitry Baryshkov <dmitry.baryshkov@linaro.org>");
1035MODULE_LICENSE("GPL v2");