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/i2c.h>
10#include <linux/interrupt.h>
11#include <linux/module.h>
12#include <linux/mutex.h>
13#include <linux/of_graph.h>
14#include <linux/platform_device.h>
15#include <linux/regmap.h>
16#include <linux/regulator/consumer.h>
17#include <linux/wait.h>
18#include <linux/workqueue.h>
19
20#include <sound/hdmi-codec.h>
21
22#include <drm/drm_atomic_helper.h>
23#include <drm/drm_bridge.h>
24#include <drm/drm_edid.h>
25#include <drm/drm_mipi_dsi.h>
26#include <drm/drm_print.h>
27#include <drm/drm_probe_helper.h>
28
29#define EDID_BLOCK_SIZE 128
30#define EDID_NUM_BLOCKS 2
31
32#define FW_FILE "lt9611uxc_fw.bin"
33
34struct lt9611uxc {
35 struct device *dev;
36 struct drm_bridge bridge;
37 struct drm_connector connector;
38
39 struct regmap *regmap;
40 /* Protects all accesses to registers by stopping the on-chip MCU */
41 struct mutex ocm_lock;
42
43 struct wait_queue_head wq;
44 struct work_struct work;
45
46 struct device_node *dsi0_node;
47 struct device_node *dsi1_node;
48 struct mipi_dsi_device *dsi0;
49 struct mipi_dsi_device *dsi1;
50 struct platform_device *audio_pdev;
51
52 struct gpio_desc *reset_gpio;
53 struct gpio_desc *enable_gpio;
54
55 struct regulator_bulk_data supplies[2];
56
57 struct i2c_client *client;
58
59 bool hpd_supported;
60 bool edid_read;
61 /* can be accessed from different threads, so protect this with ocm_lock */
62 bool hdmi_connected;
63 uint8_t fw_version;
64};
65
66#define LT9611_PAGE_CONTROL 0xff
67
68static const struct regmap_range_cfg lt9611uxc_ranges[] = {
69 {
70 .name = "register_range",
71 .range_min = 0,
72 .range_max = 0xd0ff,
73 .selector_reg = LT9611_PAGE_CONTROL,
74 .selector_mask = 0xff,
75 .selector_shift = 0,
76 .window_start = 0,
77 .window_len = 0x100,
78 },
79};
80
81static const struct regmap_config lt9611uxc_regmap_config = {
82 .reg_bits = 8,
83 .val_bits = 8,
84 .max_register = 0xffff,
85 .ranges = lt9611uxc_ranges,
86 .num_ranges = ARRAY_SIZE(lt9611uxc_ranges),
87};
88
89struct lt9611uxc_mode {
90 u16 hdisplay;
91 u16 vdisplay;
92 u8 vrefresh;
93};
94
95/*
96 * This chip supports only a fixed set of modes.
97 * Enumerate them here to check whether the mode is supported.
98 */
99static struct lt9611uxc_mode lt9611uxc_modes[] = {
100 { 1920, 1080, 60 },
101 { 1920, 1080, 30 },
102 { 1920, 1080, 25 },
103 { 1366, 768, 60 },
104 { 1360, 768, 60 },
105 { 1280, 1024, 60 },
106 { 1280, 800, 60 },
107 { 1280, 720, 60 },
108 { 1280, 720, 50 },
109 { 1280, 720, 30 },
110 { 1152, 864, 60 },
111 { 1024, 768, 60 },
112 { 800, 600, 60 },
113 { 720, 576, 50 },
114 { 720, 480, 60 },
115 { 640, 480, 60 },
116};
117
118static struct lt9611uxc *bridge_to_lt9611uxc(struct drm_bridge *bridge)
119{
120 return container_of(bridge, struct lt9611uxc, bridge);
121}
122
123static struct lt9611uxc *connector_to_lt9611uxc(struct drm_connector *connector)
124{
125 return container_of(connector, struct lt9611uxc, connector);
126}
127
128static void lt9611uxc_lock(struct lt9611uxc *lt9611uxc)
129{
130 mutex_lock(&lt9611uxc->ocm_lock);
131 regmap_write(map: lt9611uxc->regmap, reg: 0x80ee, val: 0x01);
132}
133
134static void lt9611uxc_unlock(struct lt9611uxc *lt9611uxc)
135{
136 regmap_write(map: lt9611uxc->regmap, reg: 0x80ee, val: 0x00);
137 msleep(msecs: 50);
138 mutex_unlock(lock: &lt9611uxc->ocm_lock);
139}
140
141static irqreturn_t lt9611uxc_irq_thread_handler(int irq, void *dev_id)
142{
143 struct lt9611uxc *lt9611uxc = dev_id;
144 unsigned int irq_status = 0;
145 unsigned int hpd_status = 0;
146
147 lt9611uxc_lock(lt9611uxc);
148
149 regmap_read(map: lt9611uxc->regmap, reg: 0xb022, val: &irq_status);
150 regmap_read(map: lt9611uxc->regmap, reg: 0xb023, val: &hpd_status);
151 if (irq_status)
152 regmap_write(map: lt9611uxc->regmap, reg: 0xb022, val: 0);
153
154 if (irq_status & BIT(0)) {
155 lt9611uxc->edid_read = !!(hpd_status & BIT(0));
156 wake_up_all(&lt9611uxc->wq);
157 }
158
159 if (irq_status & BIT(1)) {
160 lt9611uxc->hdmi_connected = hpd_status & BIT(1);
161 schedule_work(work: &lt9611uxc->work);
162 }
163
164 lt9611uxc_unlock(lt9611uxc);
165
166 return IRQ_HANDLED;
167}
168
169static void lt9611uxc_hpd_work(struct work_struct *work)
170{
171 struct lt9611uxc *lt9611uxc = container_of(work, struct lt9611uxc, work);
172 bool connected;
173
174 if (lt9611uxc->connector.dev) {
175 if (lt9611uxc->connector.dev->mode_config.funcs)
176 drm_kms_helper_hotplug_event(dev: lt9611uxc->connector.dev);
177 } else {
178
179 mutex_lock(&lt9611uxc->ocm_lock);
180 connected = lt9611uxc->hdmi_connected;
181 mutex_unlock(lock: &lt9611uxc->ocm_lock);
182
183 drm_bridge_hpd_notify(bridge: &lt9611uxc->bridge,
184 status: connected ?
185 connector_status_connected :
186 connector_status_disconnected);
187 }
188}
189
190static void lt9611uxc_reset(struct lt9611uxc *lt9611uxc)
191{
192 gpiod_set_value_cansleep(desc: lt9611uxc->reset_gpio, value: 1);
193 msleep(msecs: 20);
194
195 gpiod_set_value_cansleep(desc: lt9611uxc->reset_gpio, value: 0);
196 msleep(msecs: 20);
197
198 gpiod_set_value_cansleep(desc: lt9611uxc->reset_gpio, value: 1);
199 msleep(msecs: 300);
200}
201
202static void lt9611uxc_assert_5v(struct lt9611uxc *lt9611uxc)
203{
204 if (!lt9611uxc->enable_gpio)
205 return;
206
207 gpiod_set_value_cansleep(desc: lt9611uxc->enable_gpio, value: 1);
208 msleep(msecs: 20);
209}
210
211static int lt9611uxc_regulator_init(struct lt9611uxc *lt9611uxc)
212{
213 int ret;
214
215 lt9611uxc->supplies[0].supply = "vdd";
216 lt9611uxc->supplies[1].supply = "vcc";
217
218 ret = devm_regulator_bulk_get(dev: lt9611uxc->dev, num_consumers: 2, consumers: lt9611uxc->supplies);
219 if (ret < 0)
220 return ret;
221
222 return regulator_set_load(regulator: lt9611uxc->supplies[0].consumer, load_uA: 200000);
223}
224
225static int lt9611uxc_regulator_enable(struct lt9611uxc *lt9611uxc)
226{
227 int ret;
228
229 ret = regulator_enable(regulator: lt9611uxc->supplies[0].consumer);
230 if (ret < 0)
231 return ret;
232
233 usleep_range(min: 1000, max: 10000); /* 50000 according to dtsi */
234
235 ret = regulator_enable(regulator: lt9611uxc->supplies[1].consumer);
236 if (ret < 0) {
237 regulator_disable(regulator: lt9611uxc->supplies[0].consumer);
238 return ret;
239 }
240
241 return 0;
242}
243
244static struct lt9611uxc_mode *lt9611uxc_find_mode(const struct drm_display_mode *mode)
245{
246 int i;
247
248 for (i = 0; i < ARRAY_SIZE(lt9611uxc_modes); i++) {
249 if (lt9611uxc_modes[i].hdisplay == mode->hdisplay &&
250 lt9611uxc_modes[i].vdisplay == mode->vdisplay &&
251 lt9611uxc_modes[i].vrefresh == drm_mode_vrefresh(mode)) {
252 return &lt9611uxc_modes[i];
253 }
254 }
255
256 return NULL;
257}
258
259static struct mipi_dsi_device *lt9611uxc_attach_dsi(struct lt9611uxc *lt9611uxc,
260 struct device_node *dsi_node)
261{
262 const struct mipi_dsi_device_info info = { "lt9611uxc", 0, NULL };
263 struct mipi_dsi_device *dsi;
264 struct mipi_dsi_host *host;
265 struct device *dev = lt9611uxc->dev;
266 int ret;
267
268 host = of_find_mipi_dsi_host_by_node(node: dsi_node);
269 if (!host) {
270 dev_err(dev, "failed to find dsi host\n");
271 return ERR_PTR(error: -EPROBE_DEFER);
272 }
273
274 dsi = devm_mipi_dsi_device_register_full(dev, host, info: &info);
275 if (IS_ERR(ptr: dsi)) {
276 dev_err(dev, "failed to create dsi device\n");
277 return dsi;
278 }
279
280 dsi->lanes = 4;
281 dsi->format = MIPI_DSI_FMT_RGB888;
282 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
283 MIPI_DSI_MODE_VIDEO_HSE;
284
285 ret = devm_mipi_dsi_attach(dev, dsi);
286 if (ret < 0) {
287 dev_err(dev, "failed to attach dsi to host\n");
288 return ERR_PTR(error: ret);
289 }
290
291 return dsi;
292}
293
294static int lt9611uxc_connector_get_modes(struct drm_connector *connector)
295{
296 struct lt9611uxc *lt9611uxc = connector_to_lt9611uxc(connector);
297 const struct drm_edid *drm_edid;
298 int count;
299
300 drm_edid = drm_bridge_edid_read(bridge: &lt9611uxc->bridge, connector);
301 drm_edid_connector_update(connector, edid: drm_edid);
302 count = drm_edid_connector_add_modes(connector);
303 drm_edid_free(drm_edid);
304
305 return count;
306}
307
308static enum drm_connector_status lt9611uxc_connector_detect(struct drm_connector *connector,
309 bool force)
310{
311 struct lt9611uxc *lt9611uxc = connector_to_lt9611uxc(connector);
312
313 return lt9611uxc->bridge.funcs->detect(&lt9611uxc->bridge);
314}
315
316static enum drm_mode_status lt9611uxc_connector_mode_valid(struct drm_connector *connector,
317 struct drm_display_mode *mode)
318{
319 struct lt9611uxc_mode *lt9611uxc_mode = lt9611uxc_find_mode(mode);
320
321 return lt9611uxc_mode ? MODE_OK : MODE_BAD;
322}
323
324static const struct drm_connector_helper_funcs lt9611uxc_bridge_connector_helper_funcs = {
325 .get_modes = lt9611uxc_connector_get_modes,
326 .mode_valid = lt9611uxc_connector_mode_valid,
327};
328
329static const struct drm_connector_funcs lt9611uxc_bridge_connector_funcs = {
330 .fill_modes = drm_helper_probe_single_connector_modes,
331 .detect = lt9611uxc_connector_detect,
332 .destroy = drm_connector_cleanup,
333 .reset = drm_atomic_helper_connector_reset,
334 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
335 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
336};
337
338static int lt9611uxc_connector_init(struct drm_bridge *bridge, struct lt9611uxc *lt9611uxc)
339{
340 int ret;
341
342 if (!bridge->encoder) {
343 DRM_ERROR("Parent encoder object not found");
344 return -ENODEV;
345 }
346
347 lt9611uxc->connector.polled = DRM_CONNECTOR_POLL_HPD;
348
349 drm_connector_helper_add(connector: &lt9611uxc->connector,
350 funcs: &lt9611uxc_bridge_connector_helper_funcs);
351 ret = drm_connector_init(dev: bridge->dev, connector: &lt9611uxc->connector,
352 funcs: &lt9611uxc_bridge_connector_funcs,
353 DRM_MODE_CONNECTOR_HDMIA);
354 if (ret) {
355 DRM_ERROR("Failed to initialize connector with drm\n");
356 return ret;
357 }
358
359 return drm_connector_attach_encoder(connector: &lt9611uxc->connector, encoder: bridge->encoder);
360}
361
362static int lt9611uxc_bridge_attach(struct drm_bridge *bridge,
363 enum drm_bridge_attach_flags flags)
364{
365 struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge);
366 int ret;
367
368 if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
369 ret = lt9611uxc_connector_init(bridge, lt9611uxc);
370 if (ret < 0)
371 return ret;
372 }
373
374 return 0;
375}
376
377static enum drm_mode_status
378lt9611uxc_bridge_mode_valid(struct drm_bridge *bridge,
379 const struct drm_display_info *info,
380 const struct drm_display_mode *mode)
381{
382 struct lt9611uxc_mode *lt9611uxc_mode;
383
384 lt9611uxc_mode = lt9611uxc_find_mode(mode);
385
386 return lt9611uxc_mode ? MODE_OK : MODE_BAD;
387}
388
389static void lt9611uxc_video_setup(struct lt9611uxc *lt9611uxc,
390 const struct drm_display_mode *mode)
391{
392 u32 h_total, hactive, hsync_len, hfront_porch;
393 u32 v_total, vactive, vsync_len, vfront_porch;
394
395 h_total = mode->htotal;
396 v_total = mode->vtotal;
397
398 hactive = mode->hdisplay;
399 hsync_len = mode->hsync_end - mode->hsync_start;
400 hfront_porch = mode->hsync_start - mode->hdisplay;
401
402 vactive = mode->vdisplay;
403 vsync_len = mode->vsync_end - mode->vsync_start;
404 vfront_porch = mode->vsync_start - mode->vdisplay;
405
406 regmap_write(map: lt9611uxc->regmap, reg: 0xd00d, val: (u8)(v_total / 256));
407 regmap_write(map: lt9611uxc->regmap, reg: 0xd00e, val: (u8)(v_total % 256));
408
409 regmap_write(map: lt9611uxc->regmap, reg: 0xd00f, val: (u8)(vactive / 256));
410 regmap_write(map: lt9611uxc->regmap, reg: 0xd010, val: (u8)(vactive % 256));
411
412 regmap_write(map: lt9611uxc->regmap, reg: 0xd011, val: (u8)(h_total / 256));
413 regmap_write(map: lt9611uxc->regmap, reg: 0xd012, val: (u8)(h_total % 256));
414
415 regmap_write(map: lt9611uxc->regmap, reg: 0xd013, val: (u8)(hactive / 256));
416 regmap_write(map: lt9611uxc->regmap, reg: 0xd014, val: (u8)(hactive % 256));
417
418 regmap_write(map: lt9611uxc->regmap, reg: 0xd015, val: (u8)(vsync_len % 256));
419
420 regmap_update_bits(map: lt9611uxc->regmap, reg: 0xd016, mask: 0xf, val: (u8)(hsync_len / 256));
421 regmap_write(map: lt9611uxc->regmap, reg: 0xd017, val: (u8)(hsync_len % 256));
422
423 regmap_update_bits(map: lt9611uxc->regmap, reg: 0xd018, mask: 0xf, val: (u8)(vfront_porch / 256));
424 regmap_write(map: lt9611uxc->regmap, reg: 0xd019, val: (u8)(vfront_porch % 256));
425
426 regmap_update_bits(map: lt9611uxc->regmap, reg: 0xd01a, mask: 0xf, val: (u8)(hfront_porch / 256));
427 regmap_write(map: lt9611uxc->regmap, reg: 0xd01b, val: (u8)(hfront_porch % 256));
428}
429
430static void lt9611uxc_bridge_mode_set(struct drm_bridge *bridge,
431 const struct drm_display_mode *mode,
432 const struct drm_display_mode *adj_mode)
433{
434 struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge);
435
436 lt9611uxc_lock(lt9611uxc);
437 lt9611uxc_video_setup(lt9611uxc, mode);
438 lt9611uxc_unlock(lt9611uxc);
439}
440
441static enum drm_connector_status lt9611uxc_bridge_detect(struct drm_bridge *bridge)
442{
443 struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge);
444 unsigned int reg_val = 0;
445 int ret;
446 bool connected = true;
447
448 lt9611uxc_lock(lt9611uxc);
449
450 if (lt9611uxc->hpd_supported) {
451 ret = regmap_read(map: lt9611uxc->regmap, reg: 0xb023, val: &reg_val);
452
453 if (ret)
454 dev_err(lt9611uxc->dev, "failed to read hpd status: %d\n", ret);
455 else
456 connected = reg_val & BIT(1);
457 }
458 lt9611uxc->hdmi_connected = connected;
459
460 lt9611uxc_unlock(lt9611uxc);
461
462 return connected ? connector_status_connected :
463 connector_status_disconnected;
464}
465
466static int lt9611uxc_wait_for_edid(struct lt9611uxc *lt9611uxc)
467{
468 return wait_event_interruptible_timeout(lt9611uxc->wq, lt9611uxc->edid_read,
469 msecs_to_jiffies(500));
470}
471
472static int lt9611uxc_get_edid_block(void *data, u8 *buf, unsigned int block, size_t len)
473{
474 struct lt9611uxc *lt9611uxc = data;
475 int ret;
476
477 if (len > EDID_BLOCK_SIZE)
478 return -EINVAL;
479
480 if (block >= EDID_NUM_BLOCKS)
481 return -EINVAL;
482
483 lt9611uxc_lock(lt9611uxc);
484
485 regmap_write(map: lt9611uxc->regmap, reg: 0xb00b, val: 0x10);
486
487 regmap_write(map: lt9611uxc->regmap, reg: 0xb00a, val: block * EDID_BLOCK_SIZE);
488
489 ret = regmap_noinc_read(map: lt9611uxc->regmap, reg: 0xb0b0, val: buf, val_len: len);
490 if (ret)
491 dev_err(lt9611uxc->dev, "edid read failed: %d\n", ret);
492
493 lt9611uxc_unlock(lt9611uxc);
494
495 return 0;
496};
497
498static const struct drm_edid *lt9611uxc_bridge_edid_read(struct drm_bridge *bridge,
499 struct drm_connector *connector)
500{
501 struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge);
502 int ret;
503
504 ret = lt9611uxc_wait_for_edid(lt9611uxc);
505 if (ret < 0) {
506 dev_err(lt9611uxc->dev, "wait for EDID failed: %d\n", ret);
507 return NULL;
508 } else if (ret == 0) {
509 dev_err(lt9611uxc->dev, "wait for EDID timeout\n");
510 return NULL;
511 }
512
513 return drm_edid_read_custom(connector, read_block: lt9611uxc_get_edid_block, context: lt9611uxc);
514}
515
516static const struct drm_bridge_funcs lt9611uxc_bridge_funcs = {
517 .attach = lt9611uxc_bridge_attach,
518 .mode_valid = lt9611uxc_bridge_mode_valid,
519 .mode_set = lt9611uxc_bridge_mode_set,
520 .detect = lt9611uxc_bridge_detect,
521 .edid_read = lt9611uxc_bridge_edid_read,
522};
523
524static int lt9611uxc_parse_dt(struct device *dev,
525 struct lt9611uxc *lt9611uxc)
526{
527 lt9611uxc->dsi0_node = of_graph_get_remote_node(node: dev->of_node, port: 0, endpoint: -1);
528 if (!lt9611uxc->dsi0_node) {
529 dev_err(lt9611uxc->dev, "failed to get remote node for primary dsi\n");
530 return -ENODEV;
531 }
532
533 lt9611uxc->dsi1_node = of_graph_get_remote_node(node: dev->of_node, port: 1, endpoint: -1);
534
535 return 0;
536}
537
538static int lt9611uxc_gpio_init(struct lt9611uxc *lt9611uxc)
539{
540 struct device *dev = lt9611uxc->dev;
541
542 lt9611uxc->reset_gpio = devm_gpiod_get(dev, con_id: "reset", flags: GPIOD_OUT_HIGH);
543 if (IS_ERR(ptr: lt9611uxc->reset_gpio)) {
544 dev_err(dev, "failed to acquire reset gpio\n");
545 return PTR_ERR(ptr: lt9611uxc->reset_gpio);
546 }
547
548 lt9611uxc->enable_gpio = devm_gpiod_get_optional(dev, con_id: "enable", flags: GPIOD_OUT_LOW);
549 if (IS_ERR(ptr: lt9611uxc->enable_gpio)) {
550 dev_err(dev, "failed to acquire enable gpio\n");
551 return PTR_ERR(ptr: lt9611uxc->enable_gpio);
552 }
553
554 return 0;
555}
556
557static int lt9611uxc_read_device_rev(struct lt9611uxc *lt9611uxc)
558{
559 unsigned int rev0, rev1, rev2;
560 int ret;
561
562 lt9611uxc_lock(lt9611uxc);
563
564 ret = regmap_read(map: lt9611uxc->regmap, reg: 0x8100, val: &rev0);
565 ret |= regmap_read(map: lt9611uxc->regmap, reg: 0x8101, val: &rev1);
566 ret |= regmap_read(map: lt9611uxc->regmap, reg: 0x8102, val: &rev2);
567 if (ret)
568 dev_err(lt9611uxc->dev, "failed to read revision: %d\n", ret);
569 else
570 dev_info(lt9611uxc->dev, "LT9611 revision: 0x%02x.%02x.%02x\n", rev0, rev1, rev2);
571
572 lt9611uxc_unlock(lt9611uxc);
573
574 return ret;
575}
576
577static int lt9611uxc_read_version(struct lt9611uxc *lt9611uxc)
578{
579 unsigned int rev;
580 int ret;
581
582 lt9611uxc_lock(lt9611uxc);
583
584 ret = regmap_read(map: lt9611uxc->regmap, reg: 0xb021, val: &rev);
585 if (ret)
586 dev_err(lt9611uxc->dev, "failed to read revision: %d\n", ret);
587 else
588 dev_info(lt9611uxc->dev, "LT9611 version: 0x%02x\n", rev);
589
590 lt9611uxc_unlock(lt9611uxc);
591
592 return ret < 0 ? ret : rev;
593}
594
595static int lt9611uxc_hdmi_hw_params(struct device *dev, void *data,
596 struct hdmi_codec_daifmt *fmt,
597 struct hdmi_codec_params *hparms)
598{
599 /*
600 * LT9611UXC will automatically detect rate and sample size, so no need
601 * to setup anything here.
602 */
603 return 0;
604}
605
606static void lt9611uxc_audio_shutdown(struct device *dev, void *data)
607{
608}
609
610static int lt9611uxc_hdmi_i2s_get_dai_id(struct snd_soc_component *component,
611 struct device_node *endpoint)
612{
613 struct of_endpoint of_ep;
614 int ret;
615
616 ret = of_graph_parse_endpoint(node: endpoint, endpoint: &of_ep);
617 if (ret < 0)
618 return ret;
619
620 /*
621 * HDMI sound should be located as reg = <2>
622 * Then, it is sound port 0
623 */
624 if (of_ep.port == 2)
625 return 0;
626
627 return -EINVAL;
628}
629
630static const struct hdmi_codec_ops lt9611uxc_codec_ops = {
631 .hw_params = lt9611uxc_hdmi_hw_params,
632 .audio_shutdown = lt9611uxc_audio_shutdown,
633 .get_dai_id = lt9611uxc_hdmi_i2s_get_dai_id,
634};
635
636static int lt9611uxc_audio_init(struct device *dev, struct lt9611uxc *lt9611uxc)
637{
638 struct hdmi_codec_pdata codec_data = {
639 .ops = &lt9611uxc_codec_ops,
640 .max_i2s_channels = 2,
641 .i2s = 1,
642 .data = lt9611uxc,
643 };
644
645 lt9611uxc->audio_pdev =
646 platform_device_register_data(parent: dev, HDMI_CODEC_DRV_NAME,
647 PLATFORM_DEVID_AUTO,
648 data: &codec_data, size: sizeof(codec_data));
649
650 return PTR_ERR_OR_ZERO(ptr: lt9611uxc->audio_pdev);
651}
652
653static void lt9611uxc_audio_exit(struct lt9611uxc *lt9611uxc)
654{
655 if (lt9611uxc->audio_pdev) {
656 platform_device_unregister(lt9611uxc->audio_pdev);
657 lt9611uxc->audio_pdev = NULL;
658 }
659}
660
661#define LT9611UXC_FW_PAGE_SIZE 32
662static void lt9611uxc_firmware_write_page(struct lt9611uxc *lt9611uxc, u16 addr, const u8 *buf)
663{
664 struct reg_sequence seq_write_prepare[] = {
665 REG_SEQ0(0x805a, 0x04),
666 REG_SEQ0(0x805a, 0x00),
667
668 REG_SEQ0(0x805e, 0xdf),
669 REG_SEQ0(0x805a, 0x20),
670 REG_SEQ0(0x805a, 0x00),
671 REG_SEQ0(0x8058, 0x21),
672 };
673
674 struct reg_sequence seq_write_addr[] = {
675 REG_SEQ0(0x805b, (addr >> 16) & 0xff),
676 REG_SEQ0(0x805c, (addr >> 8) & 0xff),
677 REG_SEQ0(0x805d, addr & 0xff),
678 REG_SEQ0(0x805a, 0x10),
679 REG_SEQ0(0x805a, 0x00),
680 };
681
682 regmap_write(map: lt9611uxc->regmap, reg: 0x8108, val: 0xbf);
683 msleep(msecs: 20);
684 regmap_write(map: lt9611uxc->regmap, reg: 0x8108, val: 0xff);
685 msleep(msecs: 20);
686 regmap_multi_reg_write(map: lt9611uxc->regmap, regs: seq_write_prepare, ARRAY_SIZE(seq_write_prepare));
687 regmap_noinc_write(map: lt9611uxc->regmap, reg: 0x8059, val: buf, LT9611UXC_FW_PAGE_SIZE);
688 regmap_multi_reg_write(map: lt9611uxc->regmap, regs: seq_write_addr, ARRAY_SIZE(seq_write_addr));
689 msleep(msecs: 20);
690}
691
692static void lt9611uxc_firmware_read_page(struct lt9611uxc *lt9611uxc, u16 addr, char *buf)
693{
694 struct reg_sequence seq_read_page[] = {
695 REG_SEQ0(0x805a, 0xa0),
696 REG_SEQ0(0x805a, 0x80),
697 REG_SEQ0(0x805b, (addr >> 16) & 0xff),
698 REG_SEQ0(0x805c, (addr >> 8) & 0xff),
699 REG_SEQ0(0x805d, addr & 0xff),
700 REG_SEQ0(0x805a, 0x90),
701 REG_SEQ0(0x805a, 0x80),
702 REG_SEQ0(0x8058, 0x21),
703 };
704
705 regmap_multi_reg_write(map: lt9611uxc->regmap, regs: seq_read_page, ARRAY_SIZE(seq_read_page));
706 regmap_noinc_read(map: lt9611uxc->regmap, reg: 0x805f, val: buf, LT9611UXC_FW_PAGE_SIZE);
707}
708
709static char *lt9611uxc_firmware_read(struct lt9611uxc *lt9611uxc, size_t size)
710{
711 struct reg_sequence seq_read_setup[] = {
712 REG_SEQ0(0x805a, 0x84),
713 REG_SEQ0(0x805a, 0x80),
714 };
715
716 char *readbuf;
717 u16 offset;
718
719 readbuf = kzalloc(ALIGN(size, 32), GFP_KERNEL);
720 if (!readbuf)
721 return NULL;
722
723 regmap_multi_reg_write(map: lt9611uxc->regmap, regs: seq_read_setup, ARRAY_SIZE(seq_read_setup));
724
725 for (offset = 0;
726 offset < size;
727 offset += LT9611UXC_FW_PAGE_SIZE)
728 lt9611uxc_firmware_read_page(lt9611uxc, addr: offset, buf: &readbuf[offset]);
729
730 return readbuf;
731}
732
733static int lt9611uxc_firmware_update(struct lt9611uxc *lt9611uxc)
734{
735 int ret;
736 u16 offset;
737 size_t remain;
738 char *readbuf;
739 const struct firmware *fw;
740
741 struct reg_sequence seq_setup[] = {
742 REG_SEQ0(0x805e, 0xdf),
743 REG_SEQ0(0x8058, 0x00),
744 REG_SEQ0(0x8059, 0x50),
745 REG_SEQ0(0x805a, 0x10),
746 REG_SEQ0(0x805a, 0x00),
747 };
748
749
750 struct reg_sequence seq_block_erase[] = {
751 REG_SEQ0(0x805a, 0x04),
752 REG_SEQ0(0x805a, 0x00),
753 REG_SEQ0(0x805b, 0x00),
754 REG_SEQ0(0x805c, 0x00),
755 REG_SEQ0(0x805d, 0x00),
756 REG_SEQ0(0x805a, 0x01),
757 REG_SEQ0(0x805a, 0x00),
758 };
759
760 ret = request_firmware(fw: &fw, FW_FILE, device: lt9611uxc->dev);
761 if (ret < 0)
762 return ret;
763
764 dev_info(lt9611uxc->dev, "Updating firmware\n");
765 lt9611uxc_lock(lt9611uxc);
766
767 regmap_multi_reg_write(map: lt9611uxc->regmap, regs: seq_setup, ARRAY_SIZE(seq_setup));
768
769 /*
770 * Need erase block 2 timess here. Sometimes, block erase can fail.
771 * This is a workaroud.
772 */
773 regmap_multi_reg_write(map: lt9611uxc->regmap, regs: seq_block_erase, ARRAY_SIZE(seq_block_erase));
774 msleep(msecs: 3000);
775 regmap_multi_reg_write(map: lt9611uxc->regmap, regs: seq_block_erase, ARRAY_SIZE(seq_block_erase));
776 msleep(msecs: 3000);
777
778 for (offset = 0, remain = fw->size;
779 remain >= LT9611UXC_FW_PAGE_SIZE;
780 offset += LT9611UXC_FW_PAGE_SIZE, remain -= LT9611UXC_FW_PAGE_SIZE)
781 lt9611uxc_firmware_write_page(lt9611uxc, addr: offset, buf: fw->data + offset);
782
783 if (remain > 0) {
784 char buf[LT9611UXC_FW_PAGE_SIZE];
785
786 memset(buf, 0xff, LT9611UXC_FW_PAGE_SIZE);
787 memcpy(buf, fw->data + offset, remain);
788 lt9611uxc_firmware_write_page(lt9611uxc, addr: offset, buf);
789 }
790 msleep(msecs: 20);
791
792 readbuf = lt9611uxc_firmware_read(lt9611uxc, size: fw->size);
793 if (!readbuf) {
794 ret = -ENOMEM;
795 goto out;
796 }
797
798 if (!memcmp(p: readbuf, q: fw->data, size: fw->size)) {
799 dev_err(lt9611uxc->dev, "Firmware update failed\n");
800 print_hex_dump(KERN_ERR, prefix_str: "fw: ", prefix_type: DUMP_PREFIX_OFFSET, rowsize: 16, groupsize: 1, buf: readbuf, len: fw->size, ascii: false);
801 ret = -EINVAL;
802 } else {
803 dev_info(lt9611uxc->dev, "Firmware updates successfully\n");
804 ret = 0;
805 }
806 kfree(objp: readbuf);
807
808out:
809 lt9611uxc_unlock(lt9611uxc);
810 lt9611uxc_reset(lt9611uxc);
811 release_firmware(fw);
812
813 return ret;
814}
815
816static ssize_t lt9611uxc_firmware_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t len)
817{
818 struct lt9611uxc *lt9611uxc = dev_get_drvdata(dev);
819 int ret;
820
821 ret = lt9611uxc_firmware_update(lt9611uxc);
822 if (ret < 0)
823 return ret;
824 return len;
825}
826
827static ssize_t lt9611uxc_firmware_show(struct device *dev, struct device_attribute *attr, char *buf)
828{
829 struct lt9611uxc *lt9611uxc = dev_get_drvdata(dev);
830
831 return sysfs_emit(buf, fmt: "%02x\n", lt9611uxc->fw_version);
832}
833
834static DEVICE_ATTR_RW(lt9611uxc_firmware);
835
836static struct attribute *lt9611uxc_attrs[] = {
837 &dev_attr_lt9611uxc_firmware.attr,
838 NULL,
839};
840
841static const struct attribute_group lt9611uxc_attr_group = {
842 .attrs = lt9611uxc_attrs,
843};
844
845static const struct attribute_group *lt9611uxc_attr_groups[] = {
846 &lt9611uxc_attr_group,
847 NULL,
848};
849
850static int lt9611uxc_probe(struct i2c_client *client)
851{
852 struct lt9611uxc *lt9611uxc;
853 struct device *dev = &client->dev;
854 int ret;
855 bool fw_updated = false;
856
857 if (!i2c_check_functionality(adap: client->adapter, I2C_FUNC_I2C)) {
858 dev_err(dev, "device doesn't support I2C\n");
859 return -ENODEV;
860 }
861
862 lt9611uxc = devm_kzalloc(dev, size: sizeof(*lt9611uxc), GFP_KERNEL);
863 if (!lt9611uxc)
864 return -ENOMEM;
865
866 lt9611uxc->dev = dev;
867 lt9611uxc->client = client;
868 mutex_init(&lt9611uxc->ocm_lock);
869
870 lt9611uxc->regmap = devm_regmap_init_i2c(client, &lt9611uxc_regmap_config);
871 if (IS_ERR(ptr: lt9611uxc->regmap)) {
872 dev_err(lt9611uxc->dev, "regmap i2c init failed\n");
873 return PTR_ERR(ptr: lt9611uxc->regmap);
874 }
875
876 ret = lt9611uxc_parse_dt(dev, lt9611uxc);
877 if (ret) {
878 dev_err(dev, "failed to parse device tree\n");
879 return ret;
880 }
881
882 ret = lt9611uxc_gpio_init(lt9611uxc);
883 if (ret < 0)
884 goto err_of_put;
885
886 ret = lt9611uxc_regulator_init(lt9611uxc);
887 if (ret < 0)
888 goto err_of_put;
889
890 lt9611uxc_assert_5v(lt9611uxc);
891
892 ret = lt9611uxc_regulator_enable(lt9611uxc);
893 if (ret)
894 goto err_of_put;
895
896 lt9611uxc_reset(lt9611uxc);
897
898 ret = lt9611uxc_read_device_rev(lt9611uxc);
899 if (ret) {
900 dev_err(dev, "failed to read chip rev\n");
901 goto err_disable_regulators;
902 }
903
904retry:
905 ret = lt9611uxc_read_version(lt9611uxc);
906 if (ret < 0) {
907 dev_err(dev, "failed to read FW version\n");
908 goto err_disable_regulators;
909 } else if (ret == 0) {
910 if (!fw_updated) {
911 fw_updated = true;
912 dev_err(dev, "FW version 0, enforcing firmware update\n");
913 ret = lt9611uxc_firmware_update(lt9611uxc);
914 if (ret < 0)
915 goto err_disable_regulators;
916 else
917 goto retry;
918 } else {
919 dev_err(dev, "FW version 0, update failed\n");
920 ret = -EOPNOTSUPP;
921 goto err_disable_regulators;
922 }
923 } else if (ret < 0x40) {
924 dev_info(dev, "FW version 0x%x, HPD not supported\n", ret);
925 } else {
926 lt9611uxc->hpd_supported = true;
927 }
928 lt9611uxc->fw_version = ret;
929
930 init_waitqueue_head(&lt9611uxc->wq);
931 INIT_WORK(&lt9611uxc->work, lt9611uxc_hpd_work);
932
933 ret = request_threaded_irq(irq: client->irq, NULL,
934 thread_fn: lt9611uxc_irq_thread_handler,
935 IRQF_ONESHOT, name: "lt9611uxc", dev: lt9611uxc);
936 if (ret) {
937 dev_err(dev, "failed to request irq\n");
938 goto err_disable_regulators;
939 }
940
941 i2c_set_clientdata(client, data: lt9611uxc);
942
943 lt9611uxc->bridge.funcs = &lt9611uxc_bridge_funcs;
944 lt9611uxc->bridge.of_node = client->dev.of_node;
945 lt9611uxc->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID;
946 if (lt9611uxc->hpd_supported)
947 lt9611uxc->bridge.ops |= DRM_BRIDGE_OP_HPD;
948 lt9611uxc->bridge.type = DRM_MODE_CONNECTOR_HDMIA;
949
950 drm_bridge_add(bridge: &lt9611uxc->bridge);
951
952 /* Attach primary DSI */
953 lt9611uxc->dsi0 = lt9611uxc_attach_dsi(lt9611uxc, dsi_node: lt9611uxc->dsi0_node);
954 if (IS_ERR(ptr: lt9611uxc->dsi0)) {
955 ret = PTR_ERR(ptr: lt9611uxc->dsi0);
956 goto err_remove_bridge;
957 }
958
959 /* Attach secondary DSI, if specified */
960 if (lt9611uxc->dsi1_node) {
961 lt9611uxc->dsi1 = lt9611uxc_attach_dsi(lt9611uxc, dsi_node: lt9611uxc->dsi1_node);
962 if (IS_ERR(ptr: lt9611uxc->dsi1)) {
963 ret = PTR_ERR(ptr: lt9611uxc->dsi1);
964 goto err_remove_bridge;
965 }
966 }
967
968 return lt9611uxc_audio_init(dev, lt9611uxc);
969
970err_remove_bridge:
971 free_irq(client->irq, lt9611uxc);
972 cancel_work_sync(work: &lt9611uxc->work);
973 drm_bridge_remove(bridge: &lt9611uxc->bridge);
974
975err_disable_regulators:
976 regulator_bulk_disable(ARRAY_SIZE(lt9611uxc->supplies), consumers: lt9611uxc->supplies);
977
978err_of_put:
979 of_node_put(node: lt9611uxc->dsi1_node);
980 of_node_put(node: lt9611uxc->dsi0_node);
981
982 return ret;
983}
984
985static void lt9611uxc_remove(struct i2c_client *client)
986{
987 struct lt9611uxc *lt9611uxc = i2c_get_clientdata(client);
988
989 free_irq(client->irq, lt9611uxc);
990 cancel_work_sync(work: &lt9611uxc->work);
991 lt9611uxc_audio_exit(lt9611uxc);
992 drm_bridge_remove(bridge: &lt9611uxc->bridge);
993
994 mutex_destroy(lock: &lt9611uxc->ocm_lock);
995
996 regulator_bulk_disable(ARRAY_SIZE(lt9611uxc->supplies), consumers: lt9611uxc->supplies);
997
998 of_node_put(node: lt9611uxc->dsi1_node);
999 of_node_put(node: lt9611uxc->dsi0_node);
1000}
1001
1002static struct i2c_device_id lt9611uxc_id[] = {
1003 { "lontium,lt9611uxc", 0 },
1004 { /* sentinel */ }
1005};
1006
1007static const struct of_device_id lt9611uxc_match_table[] = {
1008 { .compatible = "lontium,lt9611uxc" },
1009 { /* sentinel */ }
1010};
1011MODULE_DEVICE_TABLE(of, lt9611uxc_match_table);
1012
1013static struct i2c_driver lt9611uxc_driver = {
1014 .driver = {
1015 .name = "lt9611uxc",
1016 .of_match_table = lt9611uxc_match_table,
1017 .dev_groups = lt9611uxc_attr_groups,
1018 },
1019 .probe = lt9611uxc_probe,
1020 .remove = lt9611uxc_remove,
1021 .id_table = lt9611uxc_id,
1022};
1023module_i2c_driver(lt9611uxc_driver);
1024
1025MODULE_AUTHOR("Dmitry Baryshkov <dmitry.baryshkov@linaro.org>");
1026MODULE_LICENSE("GPL v2");
1027
1028MODULE_FIRMWARE(FW_FILE);
1029

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source code of linux/drivers/gpu/drm/bridge/lontium-lt9611uxc.c