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Merge tag 'io_uring-5.11-2021-01-16' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / drivers / gpu / drm / bridge / sil-sii8620.c
blob843265d7f1b123b3dee5c07cc4830314b8168c4e
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Silicon Image SiI8620 HDMI/MHL bridge driver
4 *
5 * Copyright (C) 2015, Samsung Electronics Co., Ltd.
6 * Andrzej Hajda <a.hajda@samsung.com>
7 */
8
9 #include <asm/unaligned.h>
10
11 #include <drm/bridge/mhl.h>
12 #include <drm/drm_bridge.h>
13 #include <drm/drm_crtc.h>
14 #include <drm/drm_edid.h>
15 #include <drm/drm_encoder.h>
16
17 #include <linux/clk.h>
18 #include <linux/delay.h>
19 #include <linux/extcon.h>
20 #include <linux/gpio/consumer.h>
21 #include <linux/i2c.h>
22 #include <linux/interrupt.h>
23 #include <linux/irq.h>
24 #include <linux/kernel.h>
25 #include <linux/list.h>
26 #include <linux/module.h>
27 #include <linux/mutex.h>
28 #include <linux/of_graph.h>
29 #include <linux/regulator/consumer.h>
30 #include <linux/slab.h>
31
32 #include <media/rc-core.h>
33
34 #include "sil-sii8620.h"
35
36 #define SII8620_BURST_BUF_LEN 288
37 #define VAL_RX_HDMI_CTRL2_DEFVAL VAL_RX_HDMI_CTRL2_IDLE_CNT(3)
38
39 #define MHL1_MAX_PCLK 75000
40 #define MHL1_MAX_PCLK_PP_MODE 150000
41 #define MHL3_MAX_PCLK 200000
42 #define MHL3_MAX_PCLK_PP_MODE 300000
43
44 enum sii8620_mode {
45 CM_DISCONNECTED,
46 CM_DISCOVERY,
47 CM_MHL1,
48 CM_MHL3,
49 CM_ECBUS_S
50 };
51
52 enum sii8620_sink_type {
53 SINK_NONE,
54 SINK_HDMI,
55 SINK_DVI
56 };
57
58 enum sii8620_mt_state {
59 MT_STATE_READY,
60 MT_STATE_BUSY,
61 MT_STATE_DONE
62 };
63
64 struct sii8620 {
65 struct drm_bridge bridge;
66 struct device *dev;
67 struct rc_dev *rc_dev;
68 struct clk *clk_xtal;
69 struct gpio_desc *gpio_reset;
70 struct gpio_desc *gpio_int;
71 struct regulator_bulk_data supplies[2];
72 struct mutex lock; /* context lock, protects fields below */
73 int error;
74 unsigned int use_packed_pixel:1;
75 enum sii8620_mode mode;
76 enum sii8620_sink_type sink_type;
77 u8 cbus_status;
78 u8 stat[MHL_DST_SIZE];
79 u8 xstat[MHL_XDS_SIZE];
80 u8 devcap[MHL_DCAP_SIZE];
81 u8 xdevcap[MHL_XDC_SIZE];
82 bool feature_complete;
83 bool devcap_read;
84 bool sink_detected;
85 struct edid *edid;
86 unsigned int gen2_write_burst:1;
87 enum sii8620_mt_state mt_state;
88 struct extcon_dev *extcon;
89 struct notifier_block extcon_nb;
90 struct work_struct extcon_wq;
91 int cable_state;
92 struct list_head mt_queue;
93 struct {
94 int r_size;
95 int r_count;
96 int rx_ack;
97 int rx_count;
98 u8 rx_buf[32];
99 int tx_count;
100 u8 tx_buf[32];
101 } burst;
102 };
103
104 struct sii8620_mt_msg;
105
106 typedef void (*sii8620_mt_msg_cb)(struct sii8620 *ctx,
107 struct sii8620_mt_msg *msg);
108
109 typedef void (*sii8620_cb)(struct sii8620 *ctx, int ret);
110
111 struct sii8620_mt_msg {
112 struct list_head node;
113 u8 reg[4];
114 u8 ret;
115 sii8620_mt_msg_cb send;
116 sii8620_mt_msg_cb recv;
117 sii8620_cb continuation;
118 };
119
120 static const u8 sii8620_i2c_page[] = {
121 0x39, /* Main System */
122 0x3d, /* TDM and HSIC */
123 0x49, /* TMDS Receiver, MHL EDID */
124 0x4d, /* eMSC, HDCP, HSIC */
125 0x5d, /* MHL Spec */
126 0x64, /* MHL CBUS */
127 0x59, /* Hardware TPI (Transmitter Programming Interface) */
128 0x61, /* eCBUS-S, eCBUS-D */
129 };
130
131 static void sii8620_fetch_edid(struct sii8620 *ctx);
132 static void sii8620_set_upstream_edid(struct sii8620 *ctx);
133 static void sii8620_enable_hpd(struct sii8620 *ctx);
134 static void sii8620_mhl_disconnected(struct sii8620 *ctx);
135 static void sii8620_disconnect(struct sii8620 *ctx);
136
137 static int sii8620_clear_error(struct sii8620 *ctx)
138 {
139 int ret = ctx->error;
140
141 ctx->error = 0;
142 return ret;
143 }
144
145 static void sii8620_read_buf(struct sii8620 *ctx, u16 addr, u8 *buf, int len)
146 {
147 struct device *dev = ctx->dev;
148 struct i2c_client *client = to_i2c_client(dev);
149 u8 data = addr;
150 struct i2c_msg msg[] = {
151 {
152 .addr = sii8620_i2c_page[addr >> 8],
153 .flags = client->flags,
154 .len = 1,
155 .buf = &data
156 },
157 {
158 .addr = sii8620_i2c_page[addr >> 8],
159 .flags = client->flags | I2C_M_RD,
160 .len = len,
161 .buf = buf
162 },
163 };
164 int ret;
165
166 if (ctx->error)
167 return;
168
169 ret = i2c_transfer(client->adapter, msg, 2);
170 dev_dbg(dev, "read at %04x: %*ph, %d\n", addr, len, buf, ret);
171
172 if (ret != 2) {
173 dev_err(dev, "Read at %#06x of %d bytes failed with code %d.\n",
174 addr, len, ret);
175 ctx->error = ret < 0 ? ret : -EIO;
176 }
177 }
178
179 static u8 sii8620_readb(struct sii8620 *ctx, u16 addr)
180 {
181 u8 ret = 0;
182
183 sii8620_read_buf(ctx, addr, &ret, 1);
184 return ret;
185 }
186
187 static void sii8620_write_buf(struct sii8620 *ctx, u16 addr, const u8 *buf,
188 int len)
189 {
190 struct device *dev = ctx->dev;
191 struct i2c_client *client = to_i2c_client(dev);
192 u8 data[2];
193 struct i2c_msg msg = {
194 .addr = sii8620_i2c_page[addr >> 8],
195 .flags = client->flags,
196 .len = len + 1,
197 };
198 int ret;
199
200 if (ctx->error)
201 return;
202
203 if (len > 1) {
204 msg.buf = kmalloc(len + 1, GFP_KERNEL);
205 if (!msg.buf) {
206 ctx->error = -ENOMEM;
207 return;
208 }
209 memcpy(msg.buf + 1, buf, len);
210 } else {
211 msg.buf = data;
212 msg.buf[1] = *buf;
213 }
214
215 msg.buf[0] = addr;
216
217 ret = i2c_transfer(client->adapter, &msg, 1);
218 dev_dbg(dev, "write at %04x: %*ph, %d\n", addr, len, buf, ret);
219
220 if (ret != 1) {
221 dev_err(dev, "Write at %#06x of %*ph failed with code %d.\n",
222 addr, len, buf, ret);
223 ctx->error = ret ?: -EIO;
224 }
225
226 if (len > 1)
227 kfree(msg.buf);
228 }
229
230 #define sii8620_write(ctx, addr, arr...) \
231 ({\
232 u8 d[] = { arr }; \
233 sii8620_write_buf(ctx, addr, d, ARRAY_SIZE(d)); \
234 })
235
236 static void __sii8620_write_seq(struct sii8620 *ctx, const u16 *seq, int len)
237 {
238 int i;
239
240 for (i = 0; i < len; i += 2)
241 sii8620_write(ctx, seq[i], seq[i + 1]);
242 }
243
244 #define sii8620_write_seq(ctx, seq...) \
245 ({\
246 const u16 d[] = { seq }; \
247 __sii8620_write_seq(ctx, d, ARRAY_SIZE(d)); \
248 })
249
250 #define sii8620_write_seq_static(ctx, seq...) \
251 ({\
252 static const u16 d[] = { seq }; \
253 __sii8620_write_seq(ctx, d, ARRAY_SIZE(d)); \
254 })
255
256 static void sii8620_setbits(struct sii8620 *ctx, u16 addr, u8 mask, u8 val)
257 {
258 val = (val & mask) | (sii8620_readb(ctx, addr) & ~mask);
259 sii8620_write(ctx, addr, val);
260 }
261
262 static inline bool sii8620_is_mhl3(struct sii8620 *ctx)
263 {
264 return ctx->mode >= CM_MHL3;
265 }
266
267 static void sii8620_mt_cleanup(struct sii8620 *ctx)
268 {
269 struct sii8620_mt_msg *msg, *n;
270
271 list_for_each_entry_safe(msg, n, &ctx->mt_queue, node) {
272 list_del(&msg->node);
273 kfree(msg);
274 }
275 ctx->mt_state = MT_STATE_READY;
276 }
277
278 static void sii8620_mt_work(struct sii8620 *ctx)
279 {
280 struct sii8620_mt_msg *msg;
281
282 if (ctx->error)
283 return;
284 if (ctx->mt_state == MT_STATE_BUSY || list_empty(&ctx->mt_queue))
285 return;
286
287 if (ctx->mt_state == MT_STATE_DONE) {
288 ctx->mt_state = MT_STATE_READY;
289 msg = list_first_entry(&ctx->mt_queue, struct sii8620_mt_msg,
290 node);
291 list_del(&msg->node);
292 if (msg->recv)
293 msg->recv(ctx, msg);
294 if (msg->continuation)
295 msg->continuation(ctx, msg->ret);
296 kfree(msg);
297 }
298
299 if (ctx->mt_state != MT_STATE_READY || list_empty(&ctx->mt_queue))
300 return;
301
302 ctx->mt_state = MT_STATE_BUSY;
303 msg = list_first_entry(&ctx->mt_queue, struct sii8620_mt_msg, node);
304 if (msg->send)
305 msg->send(ctx, msg);
306 }
307
308 static void sii8620_enable_gen2_write_burst(struct sii8620 *ctx)
309 {
310 u8 ctrl = BIT_MDT_RCV_CTRL_MDT_RCV_EN;
311
312 if (ctx->gen2_write_burst)
313 return;
314
315 if (ctx->mode >= CM_MHL1)
316 ctrl |= BIT_MDT_RCV_CTRL_MDT_DELAY_RCV_EN;
317
318 sii8620_write_seq(ctx,
319 REG_MDT_RCV_TIMEOUT, 100,
320 REG_MDT_RCV_CTRL, ctrl
321 );
322 ctx->gen2_write_burst = 1;
323 }
324
325 static void sii8620_disable_gen2_write_burst(struct sii8620 *ctx)
326 {
327 if (!ctx->gen2_write_burst)
328 return;
329
330 sii8620_write_seq_static(ctx,
331 REG_MDT_XMIT_CTRL, 0,
332 REG_MDT_RCV_CTRL, 0
333 );
334 ctx->gen2_write_burst = 0;
335 }
336
337 static void sii8620_start_gen2_write_burst(struct sii8620 *ctx)
338 {
339 sii8620_write_seq_static(ctx,
340 REG_MDT_INT_1_MASK, BIT_MDT_RCV_TIMEOUT
341 | BIT_MDT_RCV_SM_ABORT_PKT_RCVD | BIT_MDT_RCV_SM_ERROR
342 | BIT_MDT_XMIT_TIMEOUT | BIT_MDT_XMIT_SM_ABORT_PKT_RCVD
343 | BIT_MDT_XMIT_SM_ERROR,
344 REG_MDT_INT_0_MASK, BIT_MDT_XFIFO_EMPTY
345 | BIT_MDT_IDLE_AFTER_HAWB_DISABLE
346 | BIT_MDT_RFIFO_DATA_RDY
347 );
348 sii8620_enable_gen2_write_burst(ctx);
349 }
350
351 static void sii8620_mt_msc_cmd_send(struct sii8620 *ctx,
352 struct sii8620_mt_msg *msg)
353 {
354 if (msg->reg[0] == MHL_SET_INT &&
355 msg->reg[1] == MHL_INT_REG(RCHANGE) &&
356 msg->reg[2] == MHL_INT_RC_FEAT_REQ)
357 sii8620_enable_gen2_write_burst(ctx);
358 else
359 sii8620_disable_gen2_write_burst(ctx);
360
361 switch (msg->reg[0]) {
362 case MHL_WRITE_STAT:
363 case MHL_SET_INT:
364 sii8620_write_buf(ctx, REG_MSC_CMD_OR_OFFSET, msg->reg + 1, 2);
365 sii8620_write(ctx, REG_MSC_COMMAND_START,
366 BIT_MSC_COMMAND_START_WRITE_STAT);
367 break;
368 case MHL_MSC_MSG:
369 sii8620_write_buf(ctx, REG_MSC_CMD_OR_OFFSET, msg->reg, 3);
370 sii8620_write(ctx, REG_MSC_COMMAND_START,
371 BIT_MSC_COMMAND_START_MSC_MSG);
372 break;
373 case MHL_READ_DEVCAP_REG:
374 case MHL_READ_XDEVCAP_REG:
375 sii8620_write(ctx, REG_MSC_CMD_OR_OFFSET, msg->reg[1]);
376 sii8620_write(ctx, REG_MSC_COMMAND_START,
377 BIT_MSC_COMMAND_START_READ_DEVCAP);
378 break;
379 default:
380 dev_err(ctx->dev, "%s: command %#x not supported\n", __func__,
381 msg->reg[0]);
382 }
383 }
384
385 static struct sii8620_mt_msg *sii8620_mt_msg_new(struct sii8620 *ctx)
386 {
387 struct sii8620_mt_msg *msg = kzalloc(sizeof(*msg), GFP_KERNEL);
388
389 if (!msg)
390 ctx->error = -ENOMEM;
391 else
392 list_add_tail(&msg->node, &ctx->mt_queue);
393
394 return msg;
395 }
396
397 static void sii8620_mt_set_cont(struct sii8620 *ctx, sii8620_cb cont)
398 {
399 struct sii8620_mt_msg *msg;
400
401 if (ctx->error)
402 return;
403
404 if (list_empty(&ctx->mt_queue)) {
405 ctx->error = -EINVAL;
406 return;
407 }
408 msg = list_last_entry(&ctx->mt_queue, struct sii8620_mt_msg, node);
409 msg->continuation = cont;
410 }
411
412 static void sii8620_mt_msc_cmd(struct sii8620 *ctx, u8 cmd, u8 arg1, u8 arg2)
413 {
414 struct sii8620_mt_msg *msg = sii8620_mt_msg_new(ctx);
415
416 if (!msg)
417 return;
418
419 msg->reg[0] = cmd;
420 msg->reg[1] = arg1;
421 msg->reg[2] = arg2;
422 msg->send = sii8620_mt_msc_cmd_send;
423 }
424
425 static void sii8620_mt_write_stat(struct sii8620 *ctx, u8 reg, u8 val)
426 {
427 sii8620_mt_msc_cmd(ctx, MHL_WRITE_STAT, reg, val);
428 }
429
430 static inline void sii8620_mt_set_int(struct sii8620 *ctx, u8 irq, u8 mask)
431 {
432 sii8620_mt_msc_cmd(ctx, MHL_SET_INT, irq, mask);
433 }
434
435 static void sii8620_mt_msc_msg(struct sii8620 *ctx, u8 cmd, u8 data)
436 {
437 sii8620_mt_msc_cmd(ctx, MHL_MSC_MSG, cmd, data);
438 }
439
440 static void sii8620_mt_rap(struct sii8620 *ctx, u8 code)
441 {
442 sii8620_mt_msc_msg(ctx, MHL_MSC_MSG_RAP, code);
443 }
444
445 static void sii8620_mt_rcpk(struct sii8620 *ctx, u8 code)
446 {
447 sii8620_mt_msc_msg(ctx, MHL_MSC_MSG_RCPK, code);
448 }
449
450 static void sii8620_mt_rcpe(struct sii8620 *ctx, u8 code)
451 {
452 sii8620_mt_msc_msg(ctx, MHL_MSC_MSG_RCPE, code);
453 }
454
455 static void sii8620_mt_read_devcap_send(struct sii8620 *ctx,
456 struct sii8620_mt_msg *msg)
457 {
458 u8 ctrl = BIT_EDID_CTRL_DEVCAP_SELECT_DEVCAP
459 | BIT_EDID_CTRL_EDID_FIFO_ADDR_AUTO
460 | BIT_EDID_CTRL_EDID_MODE_EN;
461
462 if (msg->reg[0] == MHL_READ_XDEVCAP)
463 ctrl |= BIT_EDID_CTRL_XDEVCAP_EN;
464
465 sii8620_write_seq(ctx,
466 REG_INTR9_MASK, BIT_INTR9_DEVCAP_DONE,
467 REG_EDID_CTRL, ctrl,
468 REG_TPI_CBUS_START, BIT_TPI_CBUS_START_GET_DEVCAP_START
469 );
470 }
471
472 /* copy src to dst and set changed bits in src */
473 static void sii8620_update_array(u8 *dst, u8 *src, int count)
474 {
475 while (--count >= 0) {
476 *src ^= *dst;
477 *dst++ ^= *src++;
478 }
479 }
480
481 static void sii8620_identify_sink(struct sii8620 *ctx)
482 {
483 static const char * const sink_str[] = {
484 [SINK_NONE] = "NONE",
485 [SINK_HDMI] = "HDMI",
486 [SINK_DVI] = "DVI"
487 };
488
489 char sink_name[20];
490 struct device *dev = ctx->dev;
491
492 if (!ctx->sink_detected || !ctx->devcap_read)
493 return;
494
495 sii8620_fetch_edid(ctx);
496 if (!ctx->edid) {
497 dev_err(ctx->dev, "Cannot fetch EDID\n");
498 sii8620_mhl_disconnected(ctx);
499 return;
500 }
501 sii8620_set_upstream_edid(ctx);
502
503 if (drm_detect_hdmi_monitor(ctx->edid))
504 ctx->sink_type = SINK_HDMI;
505 else
506 ctx->sink_type = SINK_DVI;
507
508 drm_edid_get_monitor_name(ctx->edid, sink_name, ARRAY_SIZE(sink_name));
509
510 dev_info(dev, "detected sink(type: %s): %s\n",
511 sink_str[ctx->sink_type], sink_name);
512 }
513
514 static void sii8620_mr_devcap(struct sii8620 *ctx)
515 {
516 u8 dcap[MHL_DCAP_SIZE];
517 struct device *dev = ctx->dev;
518
519 sii8620_read_buf(ctx, REG_EDID_FIFO_RD_DATA, dcap, MHL_DCAP_SIZE);
520 if (ctx->error < 0)
521 return;
522
523 dev_info(dev, "detected dongle MHL %d.%d, ChipID %02x%02x:%02x%02x\n",
524 dcap[MHL_DCAP_MHL_VERSION] / 16,
525 dcap[MHL_DCAP_MHL_VERSION] % 16,
526 dcap[MHL_DCAP_ADOPTER_ID_H], dcap[MHL_DCAP_ADOPTER_ID_L],
527 dcap[MHL_DCAP_DEVICE_ID_H], dcap[MHL_DCAP_DEVICE_ID_L]);
528 sii8620_update_array(ctx->devcap, dcap, MHL_DCAP_SIZE);
529 ctx->devcap_read = true;
530 sii8620_identify_sink(ctx);
531 }
532
533 static void sii8620_mr_xdevcap(struct sii8620 *ctx)
534 {
535 sii8620_read_buf(ctx, REG_EDID_FIFO_RD_DATA, ctx->xdevcap,
536 MHL_XDC_SIZE);
537 }
538
539 static void sii8620_mt_read_devcap_recv(struct sii8620 *ctx,
540 struct sii8620_mt_msg *msg)
541 {
542 u8 ctrl = BIT_EDID_CTRL_DEVCAP_SELECT_DEVCAP
543 | BIT_EDID_CTRL_EDID_FIFO_ADDR_AUTO
544 | BIT_EDID_CTRL_EDID_MODE_EN;
545
546 if (msg->reg[0] == MHL_READ_XDEVCAP)
547 ctrl |= BIT_EDID_CTRL_XDEVCAP_EN;
548
549 sii8620_write_seq(ctx,
550 REG_INTR9_MASK, BIT_INTR9_DEVCAP_DONE | BIT_INTR9_EDID_DONE
551 | BIT_INTR9_EDID_ERROR,
552 REG_EDID_CTRL, ctrl,
553 REG_EDID_FIFO_ADDR, 0
554 );
555
556 if (msg->reg[0] == MHL_READ_XDEVCAP)
557 sii8620_mr_xdevcap(ctx);
558 else
559 sii8620_mr_devcap(ctx);
560 }
561
562 static void sii8620_mt_read_devcap(struct sii8620 *ctx, bool xdevcap)
563 {
564 struct sii8620_mt_msg *msg = sii8620_mt_msg_new(ctx);
565
566 if (!msg)
567 return;
568
569 msg->reg[0] = xdevcap ? MHL_READ_XDEVCAP : MHL_READ_DEVCAP;
570 msg->send = sii8620_mt_read_devcap_send;
571 msg->recv = sii8620_mt_read_devcap_recv;
572 }
573
574 static void sii8620_mt_read_devcap_reg_recv(struct sii8620 *ctx,
575 struct sii8620_mt_msg *msg)
576 {
577 u8 reg = msg->reg[1] & 0x7f;
578
579 if (msg->reg[1] & 0x80)
580 ctx->xdevcap[reg] = msg->ret;
581 else
582 ctx->devcap[reg] = msg->ret;
583 }
584
585 static void sii8620_mt_read_devcap_reg(struct sii8620 *ctx, u8 reg)
586 {
587 struct sii8620_mt_msg *msg = sii8620_mt_msg_new(ctx);
588
589 if (!msg)
590 return;
591
592 msg->reg[0] = (reg & 0x80) ? MHL_READ_XDEVCAP_REG : MHL_READ_DEVCAP_REG;
593 msg->reg[1] = reg;
594 msg->send = sii8620_mt_msc_cmd_send;
595 msg->recv = sii8620_mt_read_devcap_reg_recv;
596 }
597
598 static inline void sii8620_mt_read_xdevcap_reg(struct sii8620 *ctx, u8 reg)
599 {
600 sii8620_mt_read_devcap_reg(ctx, reg | 0x80);
601 }
602
603 static void *sii8620_burst_get_tx_buf(struct sii8620 *ctx, int len)
604 {
605 u8 *buf = &ctx->burst.tx_buf[ctx->burst.tx_count];
606 int size = len + 2;
607
608 if (ctx->burst.tx_count + size > ARRAY_SIZE(ctx->burst.tx_buf)) {
609 dev_err(ctx->dev, "TX-BLK buffer exhausted\n");
610 ctx->error = -EINVAL;
611 return NULL;
612 }
613
614 ctx->burst.tx_count += size;
615 buf[1] = len;
616
617 return buf + 2;
618 }
619
620 static u8 *sii8620_burst_get_rx_buf(struct sii8620 *ctx, int len)
621 {
622 u8 *buf = &ctx->burst.rx_buf[ctx->burst.rx_count];
623 int size = len + 1;
624
625 if (ctx->burst.tx_count + size > ARRAY_SIZE(ctx->burst.tx_buf)) {
626 dev_err(ctx->dev, "RX-BLK buffer exhausted\n");
627 ctx->error = -EINVAL;
628 return NULL;
629 }
630
631 ctx->burst.rx_count += size;
632 buf[0] = len;
633
634 return buf + 1;
635 }
636
637 static void sii8620_burst_send(struct sii8620 *ctx)
638 {
639 int tx_left = ctx->burst.tx_count;
640 u8 *d = ctx->burst.tx_buf;
641
642 while (tx_left > 0) {
643 int len = d[1] + 2;
644
645 if (ctx->burst.r_count + len > ctx->burst.r_size)
646 break;
647 d[0] = min(ctx->burst.rx_ack, 255);
648 ctx->burst.rx_ack -= d[0];
649 sii8620_write_buf(ctx, REG_EMSC_XMIT_WRITE_PORT, d, len);
650 ctx->burst.r_count += len;
651 tx_left -= len;
652 d += len;
653 }
654
655 ctx->burst.tx_count = tx_left;
656
657 while (ctx->burst.rx_ack > 0) {
658 u8 b[2] = { min(ctx->burst.rx_ack, 255), 0 };
659
660 if (ctx->burst.r_count + 2 > ctx->burst.r_size)
661 break;
662 ctx->burst.rx_ack -= b[0];
663 sii8620_write_buf(ctx, REG_EMSC_XMIT_WRITE_PORT, b, 2);
664 ctx->burst.r_count += 2;
665 }
666 }
667
668 static void sii8620_burst_receive(struct sii8620 *ctx)
669 {
670 u8 buf[3], *d;
671 int count;
672
673 sii8620_read_buf(ctx, REG_EMSCRFIFOBCNTL, buf, 2);
674 count = get_unaligned_le16(buf);
675 while (count > 0) {
676 int len = min(count, 3);
677
678 sii8620_read_buf(ctx, REG_EMSC_RCV_READ_PORT, buf, len);
679 count -= len;
680 ctx->burst.rx_ack += len - 1;
681 ctx->burst.r_count -= buf[1];
682 if (ctx->burst.r_count < 0)
683 ctx->burst.r_count = 0;
684
685 if (len < 3 || !buf[2])
686 continue;
687
688 len = buf[2];
689 d = sii8620_burst_get_rx_buf(ctx, len);
690 if (!d)
691 continue;
692 sii8620_read_buf(ctx, REG_EMSC_RCV_READ_PORT, d, len);
693 count -= len;
694 ctx->burst.rx_ack += len;
695 }
696 }
697
698 static void sii8620_burst_tx_rbuf_info(struct sii8620 *ctx, int size)
699 {
700 struct mhl_burst_blk_rcv_buffer_info *d =
701 sii8620_burst_get_tx_buf(ctx, sizeof(*d));
702 if (!d)
703 return;
704
705 d->id = cpu_to_be16(MHL_BURST_ID_BLK_RCV_BUFFER_INFO);
706 d->size = cpu_to_le16(size);
707 }
708
709 static u8 sii8620_checksum(void *ptr, int size)
710 {
711 u8 *d = ptr, sum = 0;
712
713 while (size--)
714 sum += *d++;
715
716 return sum;
717 }
718
719 static void sii8620_mhl_burst_hdr_set(struct mhl3_burst_header *h,
720 enum mhl_burst_id id)
721 {
722 h->id = cpu_to_be16(id);
723 h->total_entries = 1;
724 h->sequence_index = 1;
725 }
726
727 static void sii8620_burst_tx_bits_per_pixel_fmt(struct sii8620 *ctx, u8 fmt)
728 {
729 struct mhl_burst_bits_per_pixel_fmt *d;
730 const int size = sizeof(*d) + sizeof(d->desc[0]);
731
732 d = sii8620_burst_get_tx_buf(ctx, size);
733 if (!d)
734 return;
735
736 sii8620_mhl_burst_hdr_set(&d->hdr, MHL_BURST_ID_BITS_PER_PIXEL_FMT);
737 d->num_entries = 1;
738 d->desc[0].stream_id = 0;
739 d->desc[0].pixel_format = fmt;
740 d->hdr.checksum -= sii8620_checksum(d, size);
741 }
742
743 static void sii8620_burst_rx_all(struct sii8620 *ctx)
744 {
745 u8 *d = ctx->burst.rx_buf;
746 int count = ctx->burst.rx_count;
747
748 while (count-- > 0) {
749 int len = *d++;
750 int id = get_unaligned_be16(&d[0]);
751
752 switch (id) {
753 case MHL_BURST_ID_BLK_RCV_BUFFER_INFO:
754 ctx->burst.r_size = get_unaligned_le16(&d[2]);
755 break;
756 default:
757 break;
758 }
759 count -= len;
760 d += len;
761 }
762 ctx->burst.rx_count = 0;
763 }
764
765 static void sii8620_fetch_edid(struct sii8620 *ctx)
766 {
767 u8 lm_ddc, ddc_cmd, int3, cbus;
768 unsigned long timeout;
769 int fetched, i;
770 int edid_len = EDID_LENGTH;
771 u8 *edid;
772
773 sii8620_readb(ctx, REG_CBUS_STATUS);
774 lm_ddc = sii8620_readb(ctx, REG_LM_DDC);
775 ddc_cmd = sii8620_readb(ctx, REG_DDC_CMD);
776
777 sii8620_write_seq(ctx,
778 REG_INTR9_MASK, 0,
779 REG_EDID_CTRL, BIT_EDID_CTRL_EDID_FIFO_ADDR_AUTO,
780 REG_HDCP2X_POLL_CS, 0x71,
781 REG_HDCP2X_CTRL_0, BIT_HDCP2X_CTRL_0_HDCP2X_HDCPTX,
782 REG_LM_DDC, lm_ddc | BIT_LM_DDC_SW_TPI_EN_DISABLED,
783 );
784
785 for (i = 0; i < 256; ++i) {
786 u8 ddc_stat = sii8620_readb(ctx, REG_DDC_STATUS);
787
788 if (!(ddc_stat & BIT_DDC_STATUS_DDC_I2C_IN_PROG))
789 break;
790 sii8620_write(ctx, REG_DDC_STATUS,
791 BIT_DDC_STATUS_DDC_FIFO_EMPTY);
792 }
793
794 sii8620_write(ctx, REG_DDC_ADDR, 0x50 << 1);
795
796 edid = kmalloc(EDID_LENGTH, GFP_KERNEL);
797 if (!edid) {
798 ctx->error = -ENOMEM;
799 return;
800 }
801
802 #define FETCH_SIZE 16
803 for (fetched = 0; fetched < edid_len; fetched += FETCH_SIZE) {
804 sii8620_readb(ctx, REG_DDC_STATUS);
805 sii8620_write_seq(ctx,
806 REG_DDC_CMD, ddc_cmd | VAL_DDC_CMD_DDC_CMD_ABORT,
807 REG_DDC_CMD, ddc_cmd | VAL_DDC_CMD_DDC_CMD_CLEAR_FIFO,
808 REG_DDC_STATUS, BIT_DDC_STATUS_DDC_FIFO_EMPTY
809 );
810 sii8620_write_seq(ctx,
811 REG_DDC_SEGM, fetched >> 8,
812 REG_DDC_OFFSET, fetched & 0xff,
813 REG_DDC_DIN_CNT1, FETCH_SIZE,
814 REG_DDC_DIN_CNT2, 0,
815 REG_DDC_CMD, ddc_cmd | VAL_DDC_CMD_ENH_DDC_READ_NO_ACK
816 );
817
818 int3 = 0;
819 timeout = jiffies + msecs_to_jiffies(200);
820 for (;;) {
821 cbus = sii8620_readb(ctx, REG_CBUS_STATUS);
822 if (~cbus & BIT_CBUS_STATUS_CBUS_CONNECTED) {
823 kfree(edid);
824 edid = NULL;
825 goto end;
826 }
827 if (int3 & BIT_DDC_CMD_DONE) {
828 if (sii8620_readb(ctx, REG_DDC_DOUT_CNT)
829 >= FETCH_SIZE)
830 break;
831 } else {
832 int3 = sii8620_readb(ctx, REG_INTR3);
833 }
834 if (time_is_before_jiffies(timeout)) {
835 ctx->error = -ETIMEDOUT;
836 dev_err(ctx->dev, "timeout during EDID read\n");
837 kfree(edid);
838 edid = NULL;
839 goto end;
840 }
841 usleep_range(10, 20);
842 }
843
844 sii8620_read_buf(ctx, REG_DDC_DATA, edid + fetched, FETCH_SIZE);
845 if (fetched + FETCH_SIZE == EDID_LENGTH) {
846 u8 ext = ((struct edid *)edid)->extensions;
847
848 if (ext) {
849 u8 *new_edid;
850
851 edid_len += ext * EDID_LENGTH;
852 new_edid = krealloc(edid, edid_len, GFP_KERNEL);
853 if (!new_edid) {
854 kfree(edid);
855 ctx->error = -ENOMEM;
856 return;
857 }
858 edid = new_edid;
859 }
860 }
861 }
862
863 sii8620_write_seq(ctx,
864 REG_INTR3_MASK, BIT_DDC_CMD_DONE,
865 REG_LM_DDC, lm_ddc
866 );
867
868 end:
869 kfree(ctx->edid);
870 ctx->edid = (struct edid *)edid;
871 }
872
873 static void sii8620_set_upstream_edid(struct sii8620 *ctx)
874 {
875 sii8620_setbits(ctx, REG_DPD, BIT_DPD_PDNRX12 | BIT_DPD_PDIDCK_N
876 | BIT_DPD_PD_MHL_CLK_N, 0xff);
877
878 sii8620_write_seq_static(ctx,
879 REG_RX_HDMI_CTRL3, 0x00,
880 REG_PKT_FILTER_0, 0xFF,
881 REG_PKT_FILTER_1, 0xFF,
882 REG_ALICE0_BW_I2C, 0x06
883 );
884
885 sii8620_setbits(ctx, REG_RX_HDMI_CLR_BUFFER,
886 BIT_RX_HDMI_CLR_BUFFER_VSI_CLR_EN, 0xff);
887
888 sii8620_write_seq_static(ctx,
889 REG_EDID_CTRL, BIT_EDID_CTRL_EDID_FIFO_ADDR_AUTO
890 | BIT_EDID_CTRL_EDID_MODE_EN,
891 REG_EDID_FIFO_ADDR, 0,
892 );
893
894 sii8620_write_buf(ctx, REG_EDID_FIFO_WR_DATA, (u8 *)ctx->edid,
895 (ctx->edid->extensions + 1) * EDID_LENGTH);
896
897 sii8620_write_seq_static(ctx,
898 REG_EDID_CTRL, BIT_EDID_CTRL_EDID_PRIME_VALID
899 | BIT_EDID_CTRL_EDID_FIFO_ADDR_AUTO
900 | BIT_EDID_CTRL_EDID_MODE_EN,
901 REG_INTR5_MASK, BIT_INTR_SCDT_CHANGE,
902 REG_INTR9_MASK, 0
903 );
904 }
905
906 static void sii8620_xtal_set_rate(struct sii8620 *ctx)
907 {
908 static const struct {
909 unsigned int rate;
910 u8 div;
911 u8 tp1;
912 } rates[] = {
913 { 19200, 0x04, 0x53 },
914 { 20000, 0x04, 0x62 },
915 { 24000, 0x05, 0x75 },
916 { 30000, 0x06, 0x92 },
917 { 38400, 0x0c, 0xbc },
918 };
919 unsigned long rate = clk_get_rate(ctx->clk_xtal) / 1000;
920 int i;
921
922 for (i = 0; i < ARRAY_SIZE(rates) - 1; ++i)
923 if (rate <= rates[i].rate)
924 break;
925
926 if (rate != rates[i].rate)
927 dev_err(ctx->dev, "xtal clock rate(%lukHz) not supported, setting MHL for %ukHz.\n",
928 rate, rates[i].rate);
929
930 sii8620_write(ctx, REG_DIV_CTL_MAIN, rates[i].div);
931 sii8620_write(ctx, REG_HDCP2X_TP1, rates[i].tp1);
932 }
933
934 static int sii8620_hw_on(struct sii8620 *ctx)
935 {
936 int ret;
937
938 ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
939 if (ret)
940 return ret;
941
942 usleep_range(10000, 20000);
943 ret = clk_prepare_enable(ctx->clk_xtal);
944 if (ret)
945 return ret;
946
947 msleep(100);
948 gpiod_set_value(ctx->gpio_reset, 0);
949 msleep(100);
950
951 return 0;
952 }
953
954 static int sii8620_hw_off(struct sii8620 *ctx)
955 {
956 clk_disable_unprepare(ctx->clk_xtal);
957 gpiod_set_value(ctx->gpio_reset, 1);
958 return regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
959 }
960
961 static void sii8620_cbus_reset(struct sii8620 *ctx)
962 {
963 sii8620_write(ctx, REG_PWD_SRST, BIT_PWD_SRST_CBUS_RST
964 | BIT_PWD_SRST_CBUS_RST_SW_EN);
965 usleep_range(10000, 20000);
966 sii8620_write(ctx, REG_PWD_SRST, BIT_PWD_SRST_CBUS_RST_SW_EN);
967 }
968
969 static void sii8620_set_auto_zone(struct sii8620 *ctx)
970 {
971 if (ctx->mode != CM_MHL1) {
972 sii8620_write_seq_static(ctx,
973 REG_TX_ZONE_CTL1, 0x0,
974 REG_MHL_PLL_CTL0, VAL_MHL_PLL_CTL0_HDMI_CLK_RATIO_1X
975 | BIT_MHL_PLL_CTL0_CRYSTAL_CLK_SEL
976 | BIT_MHL_PLL_CTL0_ZONE_MASK_OE
977 );
978 } else {
979 sii8620_write_seq_static(ctx,
980 REG_TX_ZONE_CTL1, VAL_TX_ZONE_CTL1_TX_ZONE_CTRL_MODE,
981 REG_MHL_PLL_CTL0, VAL_MHL_PLL_CTL0_HDMI_CLK_RATIO_1X
982 | BIT_MHL_PLL_CTL0_ZONE_MASK_OE
983 );
984 }
985 }
986
987 static void sii8620_stop_video(struct sii8620 *ctx)
988 {
989 u8 val;
990
991 sii8620_write_seq_static(ctx,
992 REG_TPI_INTR_EN, 0,
993 REG_HDCP2X_INTR0_MASK, 0,
994 REG_TPI_COPP_DATA2, 0,
995 REG_TPI_INTR_ST0, ~0,
996 );
997
998 switch (ctx->sink_type) {
999 case SINK_DVI:
1000 val = BIT_TPI_SC_REG_TMDS_OE_POWER_DOWN
1001 | BIT_TPI_SC_TPI_AV_MUTE;
1002 break;
1003 case SINK_HDMI:
1004 default:
1005 val = BIT_TPI_SC_REG_TMDS_OE_POWER_DOWN
1006 | BIT_TPI_SC_TPI_AV_MUTE
1007 | BIT_TPI_SC_TPI_OUTPUT_MODE_0_HDMI;
1008 break;
1009 }
1010
1011 sii8620_write(ctx, REG_TPI_SC, val);
1012 }
1013
1014 static void sii8620_set_format(struct sii8620 *ctx)
1015 {
1016 u8 out_fmt;
1017
1018 if (sii8620_is_mhl3(ctx)) {
1019 sii8620_setbits(ctx, REG_M3_P0CTRL,
1020 BIT_M3_P0CTRL_MHL3_P0_PIXEL_MODE_PACKED,
1021 ctx->use_packed_pixel ? ~0 : 0);
1022 } else {
1023 if (ctx->use_packed_pixel) {
1024 sii8620_write_seq_static(ctx,
1025 REG_VID_MODE, BIT_VID_MODE_M1080P,
1026 REG_MHL_TOP_CTL, BIT_MHL_TOP_CTL_MHL_PP_SEL | 1,
1027 REG_MHLTX_CTL6, 0x60
1028 );
1029 } else {
1030 sii8620_write_seq_static(ctx,
1031 REG_VID_MODE, 0,
1032 REG_MHL_TOP_CTL, 1,
1033 REG_MHLTX_CTL6, 0xa0
1034 );
1035 }
1036 }
1037
1038 if (ctx->use_packed_pixel)
1039 out_fmt = VAL_TPI_FORMAT(YCBCR422, FULL);
1040 else
1041 out_fmt = VAL_TPI_FORMAT(RGB, FULL);
1042
1043 sii8620_write_seq(ctx,
1044 REG_TPI_INPUT, VAL_TPI_FORMAT(RGB, FULL),
1045 REG_TPI_OUTPUT, out_fmt,
1046 );
1047 }
1048
1049 static int mhl3_infoframe_init(struct mhl3_infoframe *frame)
1050 {
1051 memset(frame, 0, sizeof(*frame));
1052
1053 frame->version = 3;
1054 frame->hev_format = -1;
1055 return 0;
1056 }
1057
1058 static ssize_t mhl3_infoframe_pack(struct mhl3_infoframe *frame,
1059 void *buffer, size_t size)
1060 {
1061 const int frm_len = HDMI_INFOFRAME_HEADER_SIZE + MHL3_INFOFRAME_SIZE;
1062 u8 *ptr = buffer;
1063
1064 if (size < frm_len)
1065 return -ENOSPC;
1066
1067 memset(buffer, 0, size);
1068 ptr[0] = HDMI_INFOFRAME_TYPE_VENDOR;
1069 ptr[1] = frame->version;
1070 ptr[2] = MHL3_INFOFRAME_SIZE;
1071 ptr[4] = MHL3_IEEE_OUI & 0xff;
1072 ptr[5] = (MHL3_IEEE_OUI >> 8) & 0xff;
1073 ptr[6] = (MHL3_IEEE_OUI >> 16) & 0xff;
1074 ptr[7] = frame->video_format & 0x3;
1075 ptr[7] |= (frame->format_type & 0x7) << 2;
1076 ptr[7] |= frame->sep_audio ? BIT(5) : 0;
1077 if (frame->hev_format >= 0) {
1078 ptr[9] = 1;
1079 ptr[10] = (frame->hev_format >> 8) & 0xff;
1080 ptr[11] = frame->hev_format & 0xff;
1081 }
1082 if (frame->av_delay) {
1083 bool sign = frame->av_delay < 0;
1084 int delay = sign ? -frame->av_delay : frame->av_delay;
1085
1086 ptr[12] = (delay >> 16) & 0xf;
1087 if (sign)
1088 ptr[12] |= BIT(4);
1089 ptr[13] = (delay >> 8) & 0xff;
1090 ptr[14] = delay & 0xff;
1091 }
1092 ptr[3] -= sii8620_checksum(buffer, frm_len);
1093 return frm_len;
1094 }
1095
1096 static void sii8620_set_infoframes(struct sii8620 *ctx,
1097 struct drm_display_mode *mode)
1098 {
1099 struct mhl3_infoframe mhl_frm;
1100 union hdmi_infoframe frm;
1101 u8 buf[31];
1102 int ret;
1103
1104 ret = drm_hdmi_avi_infoframe_from_display_mode(&frm.avi,
1105 NULL, mode);
1106 if (ctx->use_packed_pixel)
1107 frm.avi.colorspace = HDMI_COLORSPACE_YUV422;
1108
1109 if (!ret)
1110 ret = hdmi_avi_infoframe_pack(&frm.avi, buf, ARRAY_SIZE(buf));
1111 if (ret > 0)
1112 sii8620_write_buf(ctx, REG_TPI_AVI_CHSUM, buf + 3, ret - 3);
1113
1114 if (!sii8620_is_mhl3(ctx) || !ctx->use_packed_pixel) {
1115 sii8620_write(ctx, REG_TPI_SC,
1116 BIT_TPI_SC_TPI_OUTPUT_MODE_0_HDMI);
1117 sii8620_write(ctx, REG_PKT_FILTER_0,
1118 BIT_PKT_FILTER_0_DROP_CEA_GAMUT_PKT |
1119 BIT_PKT_FILTER_0_DROP_MPEG_PKT |
1120 BIT_PKT_FILTER_0_DROP_GCP_PKT,
1121 BIT_PKT_FILTER_1_DROP_GEN_PKT);
1122 return;
1123 }
1124
1125 sii8620_write(ctx, REG_PKT_FILTER_0,
1126 BIT_PKT_FILTER_0_DROP_CEA_GAMUT_PKT |
1127 BIT_PKT_FILTER_0_DROP_MPEG_PKT |
1128 BIT_PKT_FILTER_0_DROP_AVI_PKT |
1129 BIT_PKT_FILTER_0_DROP_GCP_PKT,
1130 BIT_PKT_FILTER_1_VSI_OVERRIDE_DIS |
1131 BIT_PKT_FILTER_1_DROP_GEN_PKT |
1132 BIT_PKT_FILTER_1_DROP_VSIF_PKT);
1133
1134 sii8620_write(ctx, REG_TPI_INFO_FSEL, BIT_TPI_INFO_FSEL_EN
1135 | BIT_TPI_INFO_FSEL_RPT | VAL_TPI_INFO_FSEL_VSI);
1136 ret = mhl3_infoframe_init(&mhl_frm);
1137 if (!ret)
1138 ret = mhl3_infoframe_pack(&mhl_frm, buf, ARRAY_SIZE(buf));
1139 sii8620_write_buf(ctx, REG_TPI_INFO_B0, buf, ret);
1140 }
1141
1142 static void sii8620_start_video(struct sii8620 *ctx)
1143 {
1144 struct drm_display_mode *mode =
1145 &ctx->bridge.encoder->crtc->state->adjusted_mode;
1146
1147 if (!sii8620_is_mhl3(ctx))
1148 sii8620_stop_video(ctx);
1149
1150 if (ctx->sink_type == SINK_DVI && !sii8620_is_mhl3(ctx)) {
1151 sii8620_write(ctx, REG_RX_HDMI_CTRL2,
1152 VAL_RX_HDMI_CTRL2_DEFVAL);
1153 sii8620_write(ctx, REG_TPI_SC, 0);
1154 return;
1155 }
1156
1157 sii8620_write_seq_static(ctx,
1158 REG_RX_HDMI_CTRL2, VAL_RX_HDMI_CTRL2_DEFVAL
1159 | BIT_RX_HDMI_CTRL2_USE_AV_MUTE,
1160 REG_VID_OVRRD, BIT_VID_OVRRD_PP_AUTO_DISABLE
1161 | BIT_VID_OVRRD_M1080P_OVRRD);
1162 sii8620_set_format(ctx);
1163
1164 if (!sii8620_is_mhl3(ctx)) {
1165 u8 link_mode = MHL_DST_LM_PATH_ENABLED;
1166
1167 if (ctx->use_packed_pixel)
1168 link_mode |= MHL_DST_LM_CLK_MODE_PACKED_PIXEL;
1169 else
1170 link_mode |= MHL_DST_LM_CLK_MODE_NORMAL;
1171
1172 sii8620_mt_write_stat(ctx, MHL_DST_REG(LINK_MODE), link_mode);
1173 sii8620_set_auto_zone(ctx);
1174 } else {
1175 static const struct {
1176 int max_clk;
1177 u8 zone;
1178 u8 link_rate;
1179 u8 rrp_decode;
1180 } clk_spec[] = {
1181 { 150000, VAL_TX_ZONE_CTL3_TX_ZONE_1_5GBPS,
1182 MHL_XDS_LINK_RATE_1_5_GBPS, 0x38 },
1183 { 300000, VAL_TX_ZONE_CTL3_TX_ZONE_3GBPS,
1184 MHL_XDS_LINK_RATE_3_0_GBPS, 0x40 },
1185 { 600000, VAL_TX_ZONE_CTL3_TX_ZONE_6GBPS,
1186 MHL_XDS_LINK_RATE_6_0_GBPS, 0x40 },
1187 };
1188 u8 p0_ctrl = BIT_M3_P0CTRL_MHL3_P0_PORT_EN;
1189 int clk = mode->clock * (ctx->use_packed_pixel ? 2 : 3);
1190 int i;
1191
1192 for (i = 0; i < ARRAY_SIZE(clk_spec) - 1; ++i)
1193 if (clk < clk_spec[i].max_clk)
1194 break;
1195
1196 if (100 * clk >= 98 * clk_spec[i].max_clk)
1197 p0_ctrl |= BIT_M3_P0CTRL_MHL3_P0_UNLIMIT_EN;
1198
1199 sii8620_burst_tx_bits_per_pixel_fmt(ctx, ctx->use_packed_pixel);
1200 sii8620_burst_send(ctx);
1201 sii8620_write_seq(ctx,
1202 REG_MHL_DP_CTL0, 0xf0,
1203 REG_MHL3_TX_ZONE_CTL, clk_spec[i].zone);
1204 sii8620_setbits(ctx, REG_M3_P0CTRL,
1205 BIT_M3_P0CTRL_MHL3_P0_PORT_EN
1206 | BIT_M3_P0CTRL_MHL3_P0_UNLIMIT_EN, p0_ctrl);
1207 sii8620_setbits(ctx, REG_M3_POSTM, MSK_M3_POSTM_RRP_DECODE,
1208 clk_spec[i].rrp_decode);
1209 sii8620_write_seq_static(ctx,
1210 REG_M3_CTRL, VAL_M3_CTRL_MHL3_VALUE
1211 | BIT_M3_CTRL_H2M_SWRST,
1212 REG_M3_CTRL, VAL_M3_CTRL_MHL3_VALUE
1213 );
1214 sii8620_mt_write_stat(ctx, MHL_XDS_REG(AVLINK_MODE_CONTROL),
1215 clk_spec[i].link_rate);
1216 }
1217
1218 sii8620_set_infoframes(ctx, mode);
1219 }
1220
1221 static void sii8620_disable_hpd(struct sii8620 *ctx)
1222 {
1223 sii8620_setbits(ctx, REG_EDID_CTRL, BIT_EDID_CTRL_EDID_PRIME_VALID, 0);
1224 sii8620_write_seq_static(ctx,
1225 REG_HPD_CTRL, BIT_HPD_CTRL_HPD_OUT_OVR_EN,
1226 REG_INTR8_MASK, 0
1227 );
1228 }
1229
1230 static void sii8620_enable_hpd(struct sii8620 *ctx)
1231 {
1232 sii8620_setbits(ctx, REG_TMDS_CSTAT_P3,
1233 BIT_TMDS_CSTAT_P3_SCDT_CLR_AVI_DIS
1234 | BIT_TMDS_CSTAT_P3_CLR_AVI, ~0);
1235 sii8620_write_seq_static(ctx,
1236 REG_HPD_CTRL, BIT_HPD_CTRL_HPD_OUT_OVR_EN
1237 | BIT_HPD_CTRL_HPD_HIGH,
1238 );
1239 }
1240
1241 static void sii8620_mhl_discover(struct sii8620 *ctx)
1242 {
1243 sii8620_write_seq_static(ctx,
1244 REG_DISC_CTRL9, BIT_DISC_CTRL9_WAKE_DRVFLT
1245 | BIT_DISC_CTRL9_DISC_PULSE_PROCEED,
1246 REG_DISC_CTRL4, VAL_DISC_CTRL4(VAL_PUP_5K, VAL_PUP_20K),
1247 REG_CBUS_DISC_INTR0_MASK, BIT_MHL3_EST_INT
1248 | BIT_MHL_EST_INT
1249 | BIT_NOT_MHL_EST_INT
1250 | BIT_CBUS_MHL3_DISCON_INT
1251 | BIT_CBUS_MHL12_DISCON_INT
1252 | BIT_RGND_READY_INT,
1253 REG_MHL_PLL_CTL0, VAL_MHL_PLL_CTL0_HDMI_CLK_RATIO_1X
1254 | BIT_MHL_PLL_CTL0_CRYSTAL_CLK_SEL
1255 | BIT_MHL_PLL_CTL0_ZONE_MASK_OE,
1256 REG_MHL_DP_CTL0, BIT_MHL_DP_CTL0_DP_OE
1257 | BIT_MHL_DP_CTL0_TX_OE_OVR,
1258 REG_M3_CTRL, VAL_M3_CTRL_MHL3_VALUE,
1259 REG_MHL_DP_CTL1, 0xA2,
1260 REG_MHL_DP_CTL2, 0x03,
1261 REG_MHL_DP_CTL3, 0x35,
1262 REG_MHL_DP_CTL5, 0x02,
1263 REG_MHL_DP_CTL6, 0x02,
1264 REG_MHL_DP_CTL7, 0x03,
1265 REG_COC_CTLC, 0xFF,
1266 REG_DPD, BIT_DPD_PWRON_PLL | BIT_DPD_PDNTX12
1267 | BIT_DPD_OSC_EN | BIT_DPD_PWRON_HSIC,
1268 REG_COC_INTR_MASK, BIT_COC_PLL_LOCK_STATUS_CHANGE
1269 | BIT_COC_CALIBRATION_DONE,
1270 REG_CBUS_INT_1_MASK, BIT_CBUS_MSC_ABORT_RCVD
1271 | BIT_CBUS_CMD_ABORT,
1272 REG_CBUS_INT_0_MASK, BIT_CBUS_MSC_MT_DONE
1273 | BIT_CBUS_HPD_CHG
1274 | BIT_CBUS_MSC_MR_WRITE_STAT
1275 | BIT_CBUS_MSC_MR_MSC_MSG
1276 | BIT_CBUS_MSC_MR_WRITE_BURST
1277 | BIT_CBUS_MSC_MR_SET_INT
1278 | BIT_CBUS_MSC_MT_DONE_NACK
1279 );
1280 }
1281
1282 static void sii8620_peer_specific_init(struct sii8620 *ctx)
1283 {
1284 if (sii8620_is_mhl3(ctx))
1285 sii8620_write_seq_static(ctx,
1286 REG_SYS_CTRL1, BIT_SYS_CTRL1_BLOCK_DDC_BY_HPD,
1287 REG_EMSCINTRMASK1,
1288 BIT_EMSCINTR1_EMSC_TRAINING_COMMA_ERR
1289 );
1290 else
1291 sii8620_write_seq_static(ctx,
1292 REG_HDCP2X_INTR0_MASK, 0x00,
1293 REG_EMSCINTRMASK1, 0x00,
1294 REG_HDCP2X_INTR0, 0xFF,
1295 REG_INTR1, 0xFF,
1296 REG_SYS_CTRL1, BIT_SYS_CTRL1_BLOCK_DDC_BY_HPD
1297 | BIT_SYS_CTRL1_TX_CTRL_HDMI
1298 );
1299 }
1300
1301 #define SII8620_MHL_VERSION 0x32
1302 #define SII8620_SCRATCHPAD_SIZE 16
1303 #define SII8620_INT_STAT_SIZE 0x33
1304
1305 static void sii8620_set_dev_cap(struct sii8620 *ctx)
1306 {
1307 static const u8 devcap[MHL_DCAP_SIZE] = {
1308 [MHL_DCAP_MHL_VERSION] = SII8620_MHL_VERSION,
1309 [MHL_DCAP_CAT] = MHL_DCAP_CAT_SOURCE | MHL_DCAP_CAT_POWER,
1310 [MHL_DCAP_ADOPTER_ID_H] = 0x01,
1311 [MHL_DCAP_ADOPTER_ID_L] = 0x41,
1312 [MHL_DCAP_VID_LINK_MODE] = MHL_DCAP_VID_LINK_RGB444
1313 | MHL_DCAP_VID_LINK_PPIXEL
1314 | MHL_DCAP_VID_LINK_16BPP,
1315 [MHL_DCAP_AUD_LINK_MODE] = MHL_DCAP_AUD_LINK_2CH,
1316 [MHL_DCAP_VIDEO_TYPE] = MHL_DCAP_VT_GRAPHICS,
1317 [MHL_DCAP_LOG_DEV_MAP] = MHL_DCAP_LD_GUI,
1318 [MHL_DCAP_BANDWIDTH] = 0x0f,
1319 [MHL_DCAP_FEATURE_FLAG] = MHL_DCAP_FEATURE_RCP_SUPPORT
1320 | MHL_DCAP_FEATURE_RAP_SUPPORT
1321 | MHL_DCAP_FEATURE_SP_SUPPORT,
1322 [MHL_DCAP_SCRATCHPAD_SIZE] = SII8620_SCRATCHPAD_SIZE,
1323 [MHL_DCAP_INT_STAT_SIZE] = SII8620_INT_STAT_SIZE,
1324 };
1325 static const u8 xdcap[MHL_XDC_SIZE] = {
1326 [MHL_XDC_ECBUS_SPEEDS] = MHL_XDC_ECBUS_S_075
1327 | MHL_XDC_ECBUS_S_8BIT,
1328 [MHL_XDC_TMDS_SPEEDS] = MHL_XDC_TMDS_150
1329 | MHL_XDC_TMDS_300 | MHL_XDC_TMDS_600,
1330 [MHL_XDC_ECBUS_ROLES] = MHL_XDC_DEV_HOST,
1331 [MHL_XDC_LOG_DEV_MAPX] = MHL_XDC_LD_PHONE,
1332 };
1333
1334 sii8620_write_buf(ctx, REG_MHL_DEVCAP_0, devcap, ARRAY_SIZE(devcap));
1335 sii8620_write_buf(ctx, REG_MHL_EXTDEVCAP_0, xdcap, ARRAY_SIZE(xdcap));
1336 }
1337
1338 static void sii8620_mhl_init(struct sii8620 *ctx)
1339 {
1340 sii8620_write_seq_static(ctx,
1341 REG_DISC_CTRL4, VAL_DISC_CTRL4(VAL_PUP_OFF, VAL_PUP_20K),
1342 REG_CBUS_MSC_COMPAT_CTRL,
1343 BIT_CBUS_MSC_COMPAT_CTRL_XDEVCAP_EN,
1344 );
1345
1346 sii8620_peer_specific_init(ctx);
1347
1348 sii8620_disable_hpd(ctx);
1349
1350 sii8620_write_seq_static(ctx,
1351 REG_EDID_CTRL, BIT_EDID_CTRL_EDID_FIFO_ADDR_AUTO,
1352 REG_DISC_CTRL9, BIT_DISC_CTRL9_WAKE_DRVFLT
1353 | BIT_DISC_CTRL9_WAKE_PULSE_BYPASS,
1354 REG_TMDS0_CCTRL1, 0x90,
1355 REG_TMDS_CLK_EN, 0x01,
1356 REG_TMDS_CH_EN, 0x11,
1357 REG_BGR_BIAS, 0x87,
1358 REG_ALICE0_ZONE_CTRL, 0xE8,
1359 REG_ALICE0_MODE_CTRL, 0x04,
1360 );
1361 sii8620_setbits(ctx, REG_LM_DDC, BIT_LM_DDC_SW_TPI_EN_DISABLED, 0);
1362 sii8620_write_seq_static(ctx,
1363 REG_TPI_HW_OPT3, 0x76,
1364 REG_TMDS_CCTRL, BIT_TMDS_CCTRL_TMDS_OE,
1365 REG_TPI_DTD_B2, 79,
1366 );
1367 sii8620_set_dev_cap(ctx);
1368 sii8620_write_seq_static(ctx,
1369 REG_MDT_XMIT_TIMEOUT, 100,
1370 REG_MDT_XMIT_CTRL, 0x03,
1371 REG_MDT_XFIFO_STAT, 0x00,
1372 REG_MDT_RCV_TIMEOUT, 100,
1373 REG_CBUS_LINK_CTRL_8, 0x1D,
1374 );
1375
1376 sii8620_start_gen2_write_burst(ctx);
1377 sii8620_write_seq_static(ctx,
1378 REG_BIST_CTRL, 0x00,
1379 REG_COC_CTL1, 0x10,
1380 REG_COC_CTL2, 0x18,
1381 REG_COC_CTLF, 0x07,
1382 REG_COC_CTL11, 0xF8,
1383 REG_COC_CTL17, 0x61,
1384 REG_COC_CTL18, 0x46,
1385 REG_COC_CTL19, 0x15,
1386 REG_COC_CTL1A, 0x01,
1387 REG_MHL_COC_CTL3, BIT_MHL_COC_CTL3_COC_AECHO_EN,
1388 REG_MHL_COC_CTL4, 0x2D,
1389 REG_MHL_COC_CTL5, 0xF9,
1390 REG_MSC_HEARTBEAT_CTRL, 0x27,
1391 );
1392 sii8620_disable_gen2_write_burst(ctx);
1393
1394 sii8620_mt_write_stat(ctx, MHL_DST_REG(VERSION), SII8620_MHL_VERSION);
1395 sii8620_mt_write_stat(ctx, MHL_DST_REG(CONNECTED_RDY),
1396 MHL_DST_CONN_DCAP_RDY | MHL_DST_CONN_XDEVCAPP_SUPP
1397 | MHL_DST_CONN_POW_STAT);
1398 sii8620_mt_set_int(ctx, MHL_INT_REG(RCHANGE), MHL_INT_RC_DCAP_CHG);
1399 }
1400
1401 static void sii8620_emsc_enable(struct sii8620 *ctx)
1402 {
1403 u8 reg;
1404
1405 sii8620_setbits(ctx, REG_GENCTL, BIT_GENCTL_EMSC_EN
1406 | BIT_GENCTL_CLR_EMSC_RFIFO
1407 | BIT_GENCTL_CLR_EMSC_XFIFO, ~0);
1408 sii8620_setbits(ctx, REG_GENCTL, BIT_GENCTL_CLR_EMSC_RFIFO
1409 | BIT_GENCTL_CLR_EMSC_XFIFO, 0);
1410 sii8620_setbits(ctx, REG_COMMECNT, BIT_COMMECNT_I2C_TO_EMSC_EN, ~0);
1411 reg = sii8620_readb(ctx, REG_EMSCINTR);
1412 sii8620_write(ctx, REG_EMSCINTR, reg);
1413 sii8620_write(ctx, REG_EMSCINTRMASK, BIT_EMSCINTR_SPI_DVLD);
1414 }
1415
1416 static int sii8620_wait_for_fsm_state(struct sii8620 *ctx, u8 state)
1417 {
1418 int i;
1419
1420 for (i = 0; i < 10; ++i) {
1421 u8 s = sii8620_readb(ctx, REG_COC_STAT_0);
1422
1423 if ((s & MSK_COC_STAT_0_FSM_STATE) == state)
1424 return 0;
1425 if (!(s & BIT_COC_STAT_0_PLL_LOCKED))
1426 return -EBUSY;
1427 usleep_range(4000, 6000);
1428 }
1429 return -ETIMEDOUT;
1430 }
1431
1432 static void sii8620_set_mode(struct sii8620 *ctx, enum sii8620_mode mode)
1433 {
1434 int ret;
1435
1436 if (ctx->mode == mode)
1437 return;
1438
1439 switch (mode) {
1440 case CM_MHL1:
1441 sii8620_write_seq_static(ctx,
1442 REG_CBUS_MSC_COMPAT_CTRL, 0x02,
1443 REG_M3_CTRL, VAL_M3_CTRL_MHL1_2_VALUE,
1444 REG_DPD, BIT_DPD_PWRON_PLL | BIT_DPD_PDNTX12
1445 | BIT_DPD_OSC_EN,
1446 REG_COC_INTR_MASK, 0
1447 );
1448 ctx->mode = mode;
1449 break;
1450 case CM_MHL3:
1451 sii8620_write(ctx, REG_M3_CTRL, VAL_M3_CTRL_MHL3_VALUE);
1452 ctx->mode = mode;
1453 return;
1454 case CM_ECBUS_S:
1455 sii8620_emsc_enable(ctx);
1456 sii8620_write_seq_static(ctx,
1457 REG_TTXSPINUMS, 4,
1458 REG_TRXSPINUMS, 4,
1459 REG_TTXHSICNUMS, 0x14,
1460 REG_TRXHSICNUMS, 0x14,
1461 REG_TTXTOTNUMS, 0x18,
1462 REG_TRXTOTNUMS, 0x18,
1463 REG_PWD_SRST, BIT_PWD_SRST_COC_DOC_RST
1464 | BIT_PWD_SRST_CBUS_RST_SW_EN,
1465 REG_MHL_COC_CTL1, 0xbd,
1466 REG_PWD_SRST, BIT_PWD_SRST_CBUS_RST_SW_EN,
1467 REG_COC_CTLB, 0x01,
1468 REG_COC_CTL0, 0x5c,
1469 REG_COC_CTL14, 0x03,
1470 REG_COC_CTL15, 0x80,
1471 REG_MHL_DP_CTL6, BIT_MHL_DP_CTL6_DP_TAP1_SGN
1472 | BIT_MHL_DP_CTL6_DP_TAP1_EN
1473 | BIT_MHL_DP_CTL6_DT_PREDRV_FEEDCAP_EN,
1474 REG_MHL_DP_CTL8, 0x03
1475 );
1476 ret = sii8620_wait_for_fsm_state(ctx, 0x03);
1477 sii8620_write_seq_static(ctx,
1478 REG_COC_CTL14, 0x00,
1479 REG_COC_CTL15, 0x80
1480 );
1481 if (!ret)
1482 sii8620_write(ctx, REG_CBUS3_CNVT, 0x85);
1483 else
1484 sii8620_disconnect(ctx);
1485 return;
1486 case CM_DISCONNECTED:
1487 ctx->mode = mode;
1488 break;
1489 default:
1490 dev_err(ctx->dev, "%s mode %d not supported\n", __func__, mode);
1491 break;
1492 }
1493
1494 sii8620_set_auto_zone(ctx);
1495
1496 if (mode != CM_MHL1)
1497 return;
1498
1499 sii8620_write_seq_static(ctx,
1500 REG_MHL_DP_CTL0, 0xBC,
1501 REG_MHL_DP_CTL1, 0xBB,
1502 REG_MHL_DP_CTL3, 0x48,
1503 REG_MHL_DP_CTL5, 0x39,
1504 REG_MHL_DP_CTL2, 0x2A,
1505 REG_MHL_DP_CTL6, 0x2A,
1506 REG_MHL_DP_CTL7, 0x08
1507 );
1508 }
1509
1510 static void sii8620_hpd_unplugged(struct sii8620 *ctx)
1511 {
1512 sii8620_disable_hpd(ctx);
1513 ctx->sink_type = SINK_NONE;
1514 ctx->sink_detected = false;
1515 ctx->feature_complete = false;
1516 kfree(ctx->edid);
1517 ctx->edid = NULL;
1518 }
1519
1520 static void sii8620_disconnect(struct sii8620 *ctx)
1521 {
1522 sii8620_disable_gen2_write_burst(ctx);
1523 sii8620_stop_video(ctx);
1524 msleep(100);
1525 sii8620_cbus_reset(ctx);
1526 sii8620_set_mode(ctx, CM_DISCONNECTED);
1527 sii8620_write_seq_static(ctx,
1528 REG_TX_ZONE_CTL1, 0,
1529 REG_MHL_PLL_CTL0, 0x07,
1530 REG_COC_CTL0, 0x40,
1531 REG_CBUS3_CNVT, 0x84,
1532 REG_COC_CTL14, 0x00,
1533 REG_COC_CTL0, 0x40,
1534 REG_HRXCTRL3, 0x07,
1535 REG_MHL_PLL_CTL0, VAL_MHL_PLL_CTL0_HDMI_CLK_RATIO_1X
1536 | BIT_MHL_PLL_CTL0_CRYSTAL_CLK_SEL
1537 | BIT_MHL_PLL_CTL0_ZONE_MASK_OE,
1538 REG_MHL_DP_CTL0, BIT_MHL_DP_CTL0_DP_OE
1539 | BIT_MHL_DP_CTL0_TX_OE_OVR,
1540 REG_MHL_DP_CTL1, 0xBB,
1541 REG_MHL_DP_CTL3, 0x48,
1542 REG_MHL_DP_CTL5, 0x3F,
1543 REG_MHL_DP_CTL2, 0x2F,
1544 REG_MHL_DP_CTL6, 0x2A,
1545 REG_MHL_DP_CTL7, 0x03
1546 );
1547 sii8620_hpd_unplugged(ctx);
1548 sii8620_write_seq_static(ctx,
1549 REG_M3_CTRL, VAL_M3_CTRL_MHL3_VALUE,
1550 REG_MHL_COC_CTL1, 0x07,
1551 REG_DISC_CTRL4, VAL_DISC_CTRL4(VAL_PUP_OFF, VAL_PUP_20K),
1552 REG_DISC_CTRL8, 0x00,
1553 REG_DISC_CTRL9, BIT_DISC_CTRL9_WAKE_DRVFLT
1554 | BIT_DISC_CTRL9_WAKE_PULSE_BYPASS,
1555 REG_INT_CTRL, 0x00,
1556 REG_MSC_HEARTBEAT_CTRL, 0x27,
1557 REG_DISC_CTRL1, 0x25,
1558 REG_CBUS_DISC_INTR0, (u8)~BIT_RGND_READY_INT,
1559 REG_CBUS_DISC_INTR0_MASK, BIT_RGND_READY_INT,
1560 REG_MDT_INT_1, 0xff,
1561 REG_MDT_INT_1_MASK, 0x00,
1562 REG_MDT_INT_0, 0xff,
1563 REG_MDT_INT_0_MASK, 0x00,
1564 REG_COC_INTR, 0xff,
1565 REG_COC_INTR_MASK, 0x00,
1566 REG_TRXINTH, 0xff,
1567 REG_TRXINTMH, 0x00,
1568 REG_CBUS_INT_0, 0xff,
1569 REG_CBUS_INT_0_MASK, 0x00,
1570 REG_CBUS_INT_1, 0xff,
1571 REG_CBUS_INT_1_MASK, 0x00,
1572 REG_EMSCINTR, 0xff,
1573 REG_EMSCINTRMASK, 0x00,
1574 REG_EMSCINTR1, 0xff,
1575 REG_EMSCINTRMASK1, 0x00,
1576 REG_INTR8, 0xff,
1577 REG_INTR8_MASK, 0x00,
1578 REG_TPI_INTR_ST0, 0xff,
1579 REG_TPI_INTR_EN, 0x00,
1580 REG_HDCP2X_INTR0, 0xff,
1581 REG_HDCP2X_INTR0_MASK, 0x00,
1582 REG_INTR9, 0xff,
1583 REG_INTR9_MASK, 0x00,
1584 REG_INTR3, 0xff,
1585 REG_INTR3_MASK, 0x00,
1586 REG_INTR5, 0xff,
1587 REG_INTR5_MASK, 0x00,
1588 REG_INTR2, 0xff,
1589 REG_INTR2_MASK, 0x00,
1590 );
1591 memset(ctx->stat, 0, sizeof(ctx->stat));
1592 memset(ctx->xstat, 0, sizeof(ctx->xstat));
1593 memset(ctx->devcap, 0, sizeof(ctx->devcap));
1594 memset(ctx->xdevcap, 0, sizeof(ctx->xdevcap));
1595 ctx->devcap_read = false;
1596 ctx->cbus_status = 0;
1597 sii8620_mt_cleanup(ctx);
1598 }
1599
1600 static void sii8620_mhl_disconnected(struct sii8620 *ctx)
1601 {
1602 sii8620_write_seq_static(ctx,
1603 REG_DISC_CTRL4, VAL_DISC_CTRL4(VAL_PUP_OFF, VAL_PUP_20K),
1604 REG_CBUS_MSC_COMPAT_CTRL,
1605 BIT_CBUS_MSC_COMPAT_CTRL_XDEVCAP_EN
1606 );
1607 sii8620_disconnect(ctx);
1608 }
1609
1610 static void sii8620_irq_disc(struct sii8620 *ctx)
1611 {
1612 u8 stat = sii8620_readb(ctx, REG_CBUS_DISC_INTR0);
1613
1614 if (stat & VAL_CBUS_MHL_DISCON)
1615 sii8620_mhl_disconnected(ctx);
1616
1617 if (stat & BIT_RGND_READY_INT) {
1618 u8 stat2 = sii8620_readb(ctx, REG_DISC_STAT2);
1619
1620 if ((stat2 & MSK_DISC_STAT2_RGND) == VAL_RGND_1K) {
1621 sii8620_mhl_discover(ctx);
1622 } else {
1623 sii8620_write_seq_static(ctx,
1624 REG_DISC_CTRL9, BIT_DISC_CTRL9_WAKE_DRVFLT
1625 | BIT_DISC_CTRL9_NOMHL_EST
1626 | BIT_DISC_CTRL9_WAKE_PULSE_BYPASS,
1627 REG_CBUS_DISC_INTR0_MASK, BIT_RGND_READY_INT
1628 | BIT_CBUS_MHL3_DISCON_INT
1629 | BIT_CBUS_MHL12_DISCON_INT
1630 | BIT_NOT_MHL_EST_INT
1631 );
1632 }
1633 }
1634 if (stat & BIT_MHL_EST_INT)
1635 sii8620_mhl_init(ctx);
1636
1637 sii8620_write(ctx, REG_CBUS_DISC_INTR0, stat);
1638 }
1639
1640 static void sii8620_read_burst(struct sii8620 *ctx)
1641 {
1642 u8 buf[17];
1643
1644 sii8620_read_buf(ctx, REG_MDT_RCV_READ_PORT, buf, ARRAY_SIZE(buf));
1645 sii8620_write(ctx, REG_MDT_RCV_CTRL, BIT_MDT_RCV_CTRL_MDT_RCV_EN |
1646 BIT_MDT_RCV_CTRL_MDT_DELAY_RCV_EN |
1647 BIT_MDT_RCV_CTRL_MDT_RFIFO_CLR_CUR);
1648 sii8620_readb(ctx, REG_MDT_RFIFO_STAT);
1649 }
1650
1651 static void sii8620_irq_g2wb(struct sii8620 *ctx)
1652 {
1653 u8 stat = sii8620_readb(ctx, REG_MDT_INT_0);
1654
1655 if (stat & BIT_MDT_IDLE_AFTER_HAWB_DISABLE)
1656 if (sii8620_is_mhl3(ctx))
1657 sii8620_mt_set_int(ctx, MHL_INT_REG(RCHANGE),
1658 MHL_INT_RC_FEAT_COMPLETE);
1659
1660 if (stat & BIT_MDT_RFIFO_DATA_RDY)
1661 sii8620_read_burst(ctx);
1662
1663 if (stat & BIT_MDT_XFIFO_EMPTY)
1664 sii8620_write(ctx, REG_MDT_XMIT_CTRL, 0);
1665
1666 sii8620_write(ctx, REG_MDT_INT_0, stat);
1667 }
1668
1669 static void sii8620_status_dcap_ready(struct sii8620 *ctx)
1670 {
1671 enum sii8620_mode mode;
1672
1673 mode = ctx->stat[MHL_DST_VERSION] >= 0x30 ? CM_MHL3 : CM_MHL1;
1674 if (mode > ctx->mode)
1675 sii8620_set_mode(ctx, mode);
1676 sii8620_peer_specific_init(ctx);
1677 sii8620_write(ctx, REG_INTR9_MASK, BIT_INTR9_DEVCAP_DONE
1678 | BIT_INTR9_EDID_DONE | BIT_INTR9_EDID_ERROR);
1679 }
1680
1681 static void sii8620_status_changed_path(struct sii8620 *ctx)
1682 {
1683 u8 link_mode;
1684
1685 if (ctx->use_packed_pixel)
1686 link_mode = MHL_DST_LM_CLK_MODE_PACKED_PIXEL;
1687 else
1688 link_mode = MHL_DST_LM_CLK_MODE_NORMAL;
1689
1690 if (ctx->stat[MHL_DST_LINK_MODE] & MHL_DST_LM_PATH_ENABLED)
1691 link_mode |= MHL_DST_LM_PATH_ENABLED;
1692
1693 sii8620_mt_write_stat(ctx, MHL_DST_REG(LINK_MODE),
1694 link_mode);
1695 }
1696
1697 static void sii8620_msc_mr_write_stat(struct sii8620 *ctx)
1698 {
1699 u8 st[MHL_DST_SIZE], xst[MHL_XDS_SIZE];
1700
1701 sii8620_read_buf(ctx, REG_MHL_STAT_0, st, MHL_DST_SIZE);
1702 sii8620_read_buf(ctx, REG_MHL_EXTSTAT_0, xst, MHL_XDS_SIZE);
1703
1704 sii8620_update_array(ctx->stat, st, MHL_DST_SIZE);
1705 sii8620_update_array(ctx->xstat, xst, MHL_XDS_SIZE);
1706
1707 if (ctx->stat[MHL_DST_CONNECTED_RDY] & st[MHL_DST_CONNECTED_RDY] &
1708 MHL_DST_CONN_DCAP_RDY) {
1709 sii8620_status_dcap_ready(ctx);
1710
1711 if (!sii8620_is_mhl3(ctx))
1712 sii8620_mt_read_devcap(ctx, false);
1713 }
1714
1715 if (st[MHL_DST_LINK_MODE] & MHL_DST_LM_PATH_ENABLED)
1716 sii8620_status_changed_path(ctx);
1717 }
1718
1719 static void sii8620_ecbus_up(struct sii8620 *ctx, int ret)
1720 {
1721 if (ret < 0)
1722 return;
1723
1724 sii8620_set_mode(ctx, CM_ECBUS_S);
1725 }
1726
1727 static void sii8620_got_ecbus_speed(struct sii8620 *ctx, int ret)
1728 {
1729 if (ret < 0)
1730 return;
1731
1732 sii8620_mt_write_stat(ctx, MHL_XDS_REG(CURR_ECBUS_MODE),
1733 MHL_XDS_ECBUS_S | MHL_XDS_SLOT_MODE_8BIT);
1734 sii8620_mt_rap(ctx, MHL_RAP_CBUS_MODE_UP);
1735 sii8620_mt_set_cont(ctx, sii8620_ecbus_up);
1736 }
1737
1738 static void sii8620_mhl_burst_emsc_support_set(struct mhl_burst_emsc_support *d,
1739 enum mhl_burst_id id)
1740 {
1741 sii8620_mhl_burst_hdr_set(&d->hdr, MHL_BURST_ID_EMSC_SUPPORT);
1742 d->num_entries = 1;
1743 d->burst_id[0] = cpu_to_be16(id);
1744 }
1745
1746 static void sii8620_send_features(struct sii8620 *ctx)
1747 {
1748 u8 buf[16];
1749
1750 sii8620_write(ctx, REG_MDT_XMIT_CTRL, BIT_MDT_XMIT_CTRL_EN
1751 | BIT_MDT_XMIT_CTRL_FIXED_BURST_LEN);
1752 sii8620_mhl_burst_emsc_support_set((void *)buf,
1753 MHL_BURST_ID_HID_PAYLOAD);
1754 sii8620_write_buf(ctx, REG_MDT_XMIT_WRITE_PORT, buf, ARRAY_SIZE(buf));
1755 }
1756
1757 static bool sii8620_rcp_consume(struct sii8620 *ctx, u8 scancode)
1758 {
1759 bool pressed = !(scancode & MHL_RCP_KEY_RELEASED_MASK);
1760
1761 scancode &= MHL_RCP_KEY_ID_MASK;
1762
1763 if (!IS_ENABLED(CONFIG_RC_CORE) || !ctx->rc_dev)
1764 return false;
1765
1766 if (pressed)
1767 rc_keydown(ctx->rc_dev, RC_PROTO_CEC, scancode, 0);
1768 else
1769 rc_keyup(ctx->rc_dev);
1770
1771 return true;
1772 }
1773
1774 static void sii8620_msc_mr_set_int(struct sii8620 *ctx)
1775 {
1776 u8 ints[MHL_INT_SIZE];
1777
1778 sii8620_read_buf(ctx, REG_MHL_INT_0, ints, MHL_INT_SIZE);
1779 sii8620_write_buf(ctx, REG_MHL_INT_0, ints, MHL_INT_SIZE);
1780
1781 if (ints[MHL_INT_RCHANGE] & MHL_INT_RC_DCAP_CHG) {
1782 switch (ctx->mode) {
1783 case CM_MHL3:
1784 sii8620_mt_read_xdevcap_reg(ctx, MHL_XDC_ECBUS_SPEEDS);
1785 sii8620_mt_set_cont(ctx, sii8620_got_ecbus_speed);
1786 break;
1787 case CM_ECBUS_S:
1788 sii8620_mt_read_devcap(ctx, true);
1789 break;
1790 default:
1791 break;
1792 }
1793 }
1794 if (ints[MHL_INT_RCHANGE] & MHL_INT_RC_FEAT_REQ)
1795 sii8620_send_features(ctx);
1796 if (ints[MHL_INT_RCHANGE] & MHL_INT_RC_FEAT_COMPLETE) {
1797 ctx->feature_complete = true;
1798 if (ctx->edid)
1799 sii8620_enable_hpd(ctx);
1800 }
1801 }
1802
1803 static struct sii8620_mt_msg *sii8620_msc_msg_first(struct sii8620 *ctx)
1804 {
1805 struct device *dev = ctx->dev;
1806
1807 if (list_empty(&ctx->mt_queue)) {
1808 dev_err(dev, "unexpected MSC MT response\n");
1809 return NULL;
1810 }
1811
1812 return list_first_entry(&ctx->mt_queue, struct sii8620_mt_msg, node);
1813 }
1814
1815 static void sii8620_msc_mt_done(struct sii8620 *ctx)
1816 {
1817 struct sii8620_mt_msg *msg = sii8620_msc_msg_first(ctx);
1818
1819 if (!msg)
1820 return;
1821
1822 msg->ret = sii8620_readb(ctx, REG_MSC_MT_RCVD_DATA0);
1823 ctx->mt_state = MT_STATE_DONE;
1824 }
1825
1826 static void sii8620_msc_mr_msc_msg(struct sii8620 *ctx)
1827 {
1828 struct sii8620_mt_msg *msg;
1829 u8 buf[2];
1830
1831 sii8620_read_buf(ctx, REG_MSC_MR_MSC_MSG_RCVD_1ST_DATA, buf, 2);
1832
1833 switch (buf[0]) {
1834 case MHL_MSC_MSG_RAPK:
1835 msg = sii8620_msc_msg_first(ctx);
1836 if (!msg)
1837 return;
1838 msg->ret = buf[1];
1839 ctx->mt_state = MT_STATE_DONE;
1840 break;
1841 case MHL_MSC_MSG_RCP:
1842 if (!sii8620_rcp_consume(ctx, buf[1]))
1843 sii8620_mt_rcpe(ctx,
1844 MHL_RCPE_STATUS_INEFFECTIVE_KEY_CODE);
1845 sii8620_mt_rcpk(ctx, buf[1]);
1846 break;
1847 default:
1848 dev_err(ctx->dev, "%s message type %d,%d not supported",
1849 __func__, buf[0], buf[1]);
1850 }
1851 }
1852
1853 static void sii8620_irq_msc(struct sii8620 *ctx)
1854 {
1855 u8 stat = sii8620_readb(ctx, REG_CBUS_INT_0);
1856
1857 if (stat & ~BIT_CBUS_HPD_CHG)
1858 sii8620_write(ctx, REG_CBUS_INT_0, stat & ~BIT_CBUS_HPD_CHG);
1859
1860 if (stat & BIT_CBUS_HPD_CHG) {
1861 u8 cbus_stat = sii8620_readb(ctx, REG_CBUS_STATUS);
1862
1863 if ((cbus_stat ^ ctx->cbus_status) & BIT_CBUS_STATUS_CBUS_HPD) {
1864 sii8620_write(ctx, REG_CBUS_INT_0, BIT_CBUS_HPD_CHG);
1865 } else {
1866 stat ^= BIT_CBUS_STATUS_CBUS_HPD;
1867 cbus_stat ^= BIT_CBUS_STATUS_CBUS_HPD;
1868 }
1869 ctx->cbus_status = cbus_stat;
1870 }
1871
1872 if (stat & BIT_CBUS_MSC_MR_WRITE_STAT)
1873 sii8620_msc_mr_write_stat(ctx);
1874
1875 if (stat & BIT_CBUS_HPD_CHG) {
1876 if (ctx->cbus_status & BIT_CBUS_STATUS_CBUS_HPD) {
1877 ctx->sink_detected = true;
1878 sii8620_identify_sink(ctx);
1879 } else {
1880 sii8620_hpd_unplugged(ctx);
1881 }
1882 }
1883
1884 if (stat & BIT_CBUS_MSC_MR_SET_INT)
1885 sii8620_msc_mr_set_int(ctx);
1886
1887 if (stat & BIT_CBUS_MSC_MT_DONE)
1888 sii8620_msc_mt_done(ctx);
1889
1890 if (stat & BIT_CBUS_MSC_MR_MSC_MSG)
1891 sii8620_msc_mr_msc_msg(ctx);
1892 }
1893
1894 static void sii8620_irq_coc(struct sii8620 *ctx)
1895 {
1896 u8 stat = sii8620_readb(ctx, REG_COC_INTR);
1897
1898 if (stat & BIT_COC_CALIBRATION_DONE) {
1899 u8 cstat = sii8620_readb(ctx, REG_COC_STAT_0);
1900
1901 cstat &= BIT_COC_STAT_0_PLL_LOCKED | MSK_COC_STAT_0_FSM_STATE;
1902 if (cstat == (BIT_COC_STAT_0_PLL_LOCKED | 0x02)) {
1903 sii8620_write_seq_static(ctx,
1904 REG_COC_CTLB, 0,
1905 REG_TRXINTMH, BIT_TDM_INTR_SYNC_DATA
1906 | BIT_TDM_INTR_SYNC_WAIT
1907 );
1908 }
1909 }
1910
1911 sii8620_write(ctx, REG_COC_INTR, stat);
1912 }
1913
1914 static void sii8620_irq_merr(struct sii8620 *ctx)
1915 {
1916 u8 stat = sii8620_readb(ctx, REG_CBUS_INT_1);
1917
1918 sii8620_write(ctx, REG_CBUS_INT_1, stat);
1919 }
1920
1921 static void sii8620_irq_edid(struct sii8620 *ctx)
1922 {
1923 u8 stat = sii8620_readb(ctx, REG_INTR9);
1924
1925 sii8620_write(ctx, REG_INTR9, stat);
1926
1927 if (stat & BIT_INTR9_DEVCAP_DONE)
1928 ctx->mt_state = MT_STATE_DONE;
1929 }
1930
1931 static void sii8620_irq_scdt(struct sii8620 *ctx)
1932 {
1933 u8 stat = sii8620_readb(ctx, REG_INTR5);
1934
1935 if (stat & BIT_INTR_SCDT_CHANGE) {
1936 u8 cstat = sii8620_readb(ctx, REG_TMDS_CSTAT_P3);
1937
1938 if (cstat & BIT_TMDS_CSTAT_P3_SCDT)
1939 sii8620_start_video(ctx);
1940 }
1941
1942 sii8620_write(ctx, REG_INTR5, stat);
1943 }
1944
1945 static void sii8620_got_xdevcap(struct sii8620 *ctx, int ret)
1946 {
1947 if (ret < 0)
1948 return;
1949
1950 sii8620_mt_read_devcap(ctx, false);
1951 }
1952
1953 static void sii8620_irq_tdm(struct sii8620 *ctx)
1954 {
1955 u8 stat = sii8620_readb(ctx, REG_TRXINTH);
1956 u8 tdm = sii8620_readb(ctx, REG_TRXSTA2);
1957
1958 if ((tdm & MSK_TDM_SYNCHRONIZED) == VAL_TDM_SYNCHRONIZED) {
1959 ctx->mode = CM_ECBUS_S;
1960 ctx->burst.rx_ack = 0;
1961 ctx->burst.r_size = SII8620_BURST_BUF_LEN;
1962 sii8620_burst_tx_rbuf_info(ctx, SII8620_BURST_BUF_LEN);
1963 sii8620_mt_read_devcap(ctx, true);
1964 sii8620_mt_set_cont(ctx, sii8620_got_xdevcap);
1965 } else {
1966 sii8620_write_seq_static(ctx,
1967 REG_MHL_PLL_CTL2, 0,
1968 REG_MHL_PLL_CTL2, BIT_MHL_PLL_CTL2_CLKDETECT_EN
1969 );
1970 }
1971
1972 sii8620_write(ctx, REG_TRXINTH, stat);
1973 }
1974
1975 static void sii8620_irq_block(struct sii8620 *ctx)
1976 {
1977 u8 stat = sii8620_readb(ctx, REG_EMSCINTR);
1978
1979 if (stat & BIT_EMSCINTR_SPI_DVLD) {
1980 u8 bstat = sii8620_readb(ctx, REG_SPIBURSTSTAT);
1981
1982 if (bstat & BIT_SPIBURSTSTAT_EMSC_NORMAL_MODE)
1983 sii8620_burst_receive(ctx);
1984 }
1985
1986 sii8620_write(ctx, REG_EMSCINTR, stat);
1987 }
1988
1989 static void sii8620_irq_ddc(struct sii8620 *ctx)
1990 {
1991 u8 stat = sii8620_readb(ctx, REG_INTR3);
1992
1993 if (stat & BIT_DDC_CMD_DONE) {
1994 sii8620_write(ctx, REG_INTR3_MASK, 0);
1995 if (sii8620_is_mhl3(ctx) && !ctx->feature_complete)
1996 sii8620_mt_set_int(ctx, MHL_INT_REG(RCHANGE),
1997 MHL_INT_RC_FEAT_REQ);
1998 else
1999 sii8620_enable_hpd(ctx);
2000 }
2001 sii8620_write(ctx, REG_INTR3, stat);
2002 }
2003
2004 /* endian agnostic, non-volatile version of test_bit */
2005 static bool sii8620_test_bit(unsigned int nr, const u8 *addr)
2006 {
2007 return 1 & (addr[nr / BITS_PER_BYTE] >> (nr % BITS_PER_BYTE));
2008 }
2009
2010 static irqreturn_t sii8620_irq_thread(int irq, void *data)
2011 {
2012 static const struct {
2013 int bit;
2014 void (*handler)(struct sii8620 *ctx);
2015 } irq_vec[] = {
2016 { BIT_FAST_INTR_STAT_DISC, sii8620_irq_disc },
2017 { BIT_FAST_INTR_STAT_G2WB, sii8620_irq_g2wb },
2018 { BIT_FAST_INTR_STAT_COC, sii8620_irq_coc },
2019 { BIT_FAST_INTR_STAT_TDM, sii8620_irq_tdm },
2020 { BIT_FAST_INTR_STAT_MSC, sii8620_irq_msc },
2021 { BIT_FAST_INTR_STAT_MERR, sii8620_irq_merr },
2022 { BIT_FAST_INTR_STAT_BLOCK, sii8620_irq_block },
2023 { BIT_FAST_INTR_STAT_EDID, sii8620_irq_edid },
2024 { BIT_FAST_INTR_STAT_DDC, sii8620_irq_ddc },
2025 { BIT_FAST_INTR_STAT_SCDT, sii8620_irq_scdt },
2026 };
2027 struct sii8620 *ctx = data;
2028 u8 stats[LEN_FAST_INTR_STAT];
2029 int i, ret;
2030
2031 mutex_lock(&ctx->lock);
2032
2033 sii8620_read_buf(ctx, REG_FAST_INTR_STAT, stats, ARRAY_SIZE(stats));
2034 for (i = 0; i < ARRAY_SIZE(irq_vec); ++i)
2035 if (sii8620_test_bit(irq_vec[i].bit, stats))
2036 irq_vec[i].handler(ctx);
2037
2038 sii8620_burst_rx_all(ctx);
2039 sii8620_mt_work(ctx);
2040 sii8620_burst_send(ctx);
2041
2042 ret = sii8620_clear_error(ctx);
2043 if (ret) {
2044 dev_err(ctx->dev, "Error during IRQ handling, %d.\n", ret);
2045 sii8620_mhl_disconnected(ctx);
2046 }
2047 mutex_unlock(&ctx->lock);
2048
2049 return IRQ_HANDLED;
2050 }
2051
2052 static void sii8620_cable_in(struct sii8620 *ctx)
2053 {
2054 struct device *dev = ctx->dev;
2055 u8 ver[5];
2056 int ret;
2057
2058 ret = sii8620_hw_on(ctx);
2059 if (ret) {
2060 dev_err(dev, "Error powering on, %d.\n", ret);
2061 return;
2062 }
2063
2064 sii8620_read_buf(ctx, REG_VND_IDL, ver, ARRAY_SIZE(ver));
2065 ret = sii8620_clear_error(ctx);
2066 if (ret) {
2067 dev_err(dev, "Error accessing I2C bus, %d.\n", ret);
2068 return;
2069 }
2070
2071 dev_info(dev, "ChipID %02x%02x:%02x%02x rev %02x.\n", ver[1], ver[0],
2072 ver[3], ver[2], ver[4]);
2073
2074 sii8620_write(ctx, REG_DPD,
2075 BIT_DPD_PWRON_PLL | BIT_DPD_PDNTX12 | BIT_DPD_OSC_EN);
2076
2077 sii8620_xtal_set_rate(ctx);
2078 sii8620_disconnect(ctx);
2079
2080 sii8620_write_seq_static(ctx,
2081 REG_MHL_CBUS_CTL0, VAL_MHL_CBUS_CTL0_CBUS_DRV_SEL_STRONG
2082 | VAL_MHL_CBUS_CTL0_CBUS_RGND_VBIAS_734,
2083 REG_MHL_CBUS_CTL1, VAL_MHL_CBUS_CTL1_1115_OHM,
2084 REG_DPD, BIT_DPD_PWRON_PLL | BIT_DPD_PDNTX12 | BIT_DPD_OSC_EN,
2085 );
2086
2087 ret = sii8620_clear_error(ctx);
2088 if (ret) {
2089 dev_err(dev, "Error accessing I2C bus, %d.\n", ret);
2090 return;
2091 }
2092
2093 enable_irq(to_i2c_client(ctx->dev)->irq);
2094 }
2095
2096 static void sii8620_init_rcp_input_dev(struct sii8620 *ctx)
2097 {
2098 struct rc_dev *rc_dev;
2099 int ret;
2100
2101 if (!IS_ENABLED(CONFIG_RC_CORE))
2102 return;
2103
2104 rc_dev = rc_allocate_device(RC_DRIVER_SCANCODE);
2105 if (!rc_dev) {
2106 dev_err(ctx->dev, "Failed to allocate RC device\n");
2107 ctx->error = -ENOMEM;
2108 return;
2109 }
2110
2111 rc_dev->input_phys = "sii8620/input0";
2112 rc_dev->input_id.bustype = BUS_VIRTUAL;
2113 rc_dev->map_name = RC_MAP_CEC;
2114 rc_dev->allowed_protocols = RC_PROTO_BIT_CEC;
2115 rc_dev->driver_name = "sii8620";
2116 rc_dev->device_name = "sii8620";
2117
2118 ret = rc_register_device(rc_dev);
2119
2120 if (ret) {
2121 dev_err(ctx->dev, "Failed to register RC device\n");
2122 ctx->error = ret;
2123 rc_free_device(ctx->rc_dev);
2124 return;
2125 }
2126 ctx->rc_dev = rc_dev;
2127 }
2128
2129 static void sii8620_cable_out(struct sii8620 *ctx)
2130 {
2131 disable_irq(to_i2c_client(ctx->dev)->irq);
2132 sii8620_hw_off(ctx);
2133 }
2134
2135 static void sii8620_extcon_work(struct work_struct *work)
2136 {
2137 struct sii8620 *ctx =
2138 container_of(work, struct sii8620, extcon_wq);
2139 int state = extcon_get_state(ctx->extcon, EXTCON_DISP_MHL);
2140
2141 if (state == ctx->cable_state)
2142 return;
2143
2144 ctx->cable_state = state;
2145
2146 if (state > 0)
2147 sii8620_cable_in(ctx);
2148 else
2149 sii8620_cable_out(ctx);
2150 }
2151
2152 static int sii8620_extcon_notifier(struct notifier_block *self,
2153 unsigned long event, void *ptr)
2154 {
2155 struct sii8620 *ctx =
2156 container_of(self, struct sii8620, extcon_nb);
2157
2158 schedule_work(&ctx->extcon_wq);
2159
2160 return NOTIFY_DONE;
2161 }
2162
2163 static int sii8620_extcon_init(struct sii8620 *ctx)
2164 {
2165 struct extcon_dev *edev;
2166 struct device_node *musb, *muic;
2167 int ret;
2168
2169 /* get micro-USB connector node */
2170 musb = of_graph_get_remote_node(ctx->dev->of_node, 1, -1);
2171 /* next get micro-USB Interface Controller node */
2172 muic = of_get_next_parent(musb);
2173
2174 if (!muic) {
2175 dev_info(ctx->dev, "no extcon found, switching to 'always on' mode\n");
2176 return 0;
2177 }
2178
2179 edev = extcon_find_edev_by_node(muic);
2180 of_node_put(muic);
2181 if (IS_ERR(edev)) {
2182 if (PTR_ERR(edev) == -EPROBE_DEFER)
2183 return -EPROBE_DEFER;
2184 dev_err(ctx->dev, "Invalid or missing extcon\n");
2185 return PTR_ERR(edev);
2186 }
2187
2188 ctx->extcon = edev;
2189 ctx->extcon_nb.notifier_call = sii8620_extcon_notifier;
2190 INIT_WORK(&ctx->extcon_wq, sii8620_extcon_work);
2191 ret = extcon_register_notifier(edev, EXTCON_DISP_MHL, &ctx->extcon_nb);
2192 if (ret) {
2193 dev_err(ctx->dev, "failed to register notifier for MHL\n");
2194 return ret;
2195 }
2196
2197 return 0;
2198 }
2199
2200 static inline struct sii8620 *bridge_to_sii8620(struct drm_bridge *bridge)
2201 {
2202 return container_of(bridge, struct sii8620, bridge);
2203 }
2204
2205 static int sii8620_attach(struct drm_bridge *bridge,
2206 enum drm_bridge_attach_flags flags)
2207 {
2208 struct sii8620 *ctx = bridge_to_sii8620(bridge);
2209
2210 sii8620_init_rcp_input_dev(ctx);
2211
2212 return sii8620_clear_error(ctx);
2213 }
2214
2215 static void sii8620_detach(struct drm_bridge *bridge)
2216 {
2217 struct sii8620 *ctx = bridge_to_sii8620(bridge);
2218
2219 if (!IS_ENABLED(CONFIG_RC_CORE))
2220 return;
2221
2222 rc_unregister_device(ctx->rc_dev);
2223 }
2224
2225 static int sii8620_is_packing_required(struct sii8620 *ctx,
2226 const struct drm_display_mode *mode)
2227 {
2228 int max_pclk, max_pclk_pp_mode;
2229
2230 if (sii8620_is_mhl3(ctx)) {
2231 max_pclk = MHL3_MAX_PCLK;
2232 max_pclk_pp_mode = MHL3_MAX_PCLK_PP_MODE;
2233 } else {
2234 max_pclk = MHL1_MAX_PCLK;
2235 max_pclk_pp_mode = MHL1_MAX_PCLK_PP_MODE;
2236 }
2237
2238 if (mode->clock < max_pclk)
2239 return 0;
2240 else if (mode->clock < max_pclk_pp_mode)
2241 return 1;
2242 else
2243 return -1;
2244 }
2245
2246 static enum drm_mode_status sii8620_mode_valid(struct drm_bridge *bridge,
2247 const struct drm_display_info *info,
2248 const struct drm_display_mode *mode)
2249 {
2250 struct sii8620 *ctx = bridge_to_sii8620(bridge);
2251 int pack_required = sii8620_is_packing_required(ctx, mode);
2252 bool can_pack = ctx->devcap[MHL_DCAP_VID_LINK_MODE] &
2253 MHL_DCAP_VID_LINK_PPIXEL;
2254
2255 switch (pack_required) {
2256 case 0:
2257 return MODE_OK;
2258 case 1:
2259 return (can_pack) ? MODE_OK : MODE_CLOCK_HIGH;
2260 default:
2261 return MODE_CLOCK_HIGH;
2262 }
2263 }
2264
2265 static bool sii8620_mode_fixup(struct drm_bridge *bridge,
2266 const struct drm_display_mode *mode,
2267 struct drm_display_mode *adjusted_mode)
2268 {
2269 struct sii8620 *ctx = bridge_to_sii8620(bridge);
2270
2271 mutex_lock(&ctx->lock);
2272
2273 ctx->use_packed_pixel = sii8620_is_packing_required(ctx, adjusted_mode);
2274
2275 mutex_unlock(&ctx->lock);
2276
2277 return true;
2278 }
2279
2280 static const struct drm_bridge_funcs sii8620_bridge_funcs = {
2281 .attach = sii8620_attach,
2282 .detach = sii8620_detach,
2283 .mode_fixup = sii8620_mode_fixup,
2284 .mode_valid = sii8620_mode_valid,
2285 };
2286
2287 static int sii8620_probe(struct i2c_client *client,
2288 const struct i2c_device_id *id)
2289 {
2290 struct device *dev = &client->dev;
2291 struct sii8620 *ctx;
2292 int ret;
2293
2294 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
2295 if (!ctx)
2296 return -ENOMEM;
2297
2298 ctx->dev = dev;
2299 mutex_init(&ctx->lock);
2300 INIT_LIST_HEAD(&ctx->mt_queue);
2301
2302 ctx->clk_xtal = devm_clk_get(dev, "xtal");
2303 if (IS_ERR(ctx->clk_xtal))
2304 return dev_err_probe(dev, PTR_ERR(ctx->clk_xtal),
2305 "failed to get xtal clock from DT\n");
2306
2307 if (!client->irq) {
2308 dev_err(dev, "no irq provided\n");
2309 return -EINVAL;
2310 }
2311 irq_set_status_flags(client->irq, IRQ_NOAUTOEN);
2312 ret = devm_request_threaded_irq(dev, client->irq, NULL,
2313 sii8620_irq_thread,
2314 IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
2315 "sii8620", ctx);
2316 if (ret < 0)
2317 return dev_err_probe(dev, ret,
2318 "failed to install IRQ handler\n");
2319
2320 ctx->gpio_reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
2321 if (IS_ERR(ctx->gpio_reset))
2322 return dev_err_probe(dev, PTR_ERR(ctx->gpio_reset),
2323 "failed to get reset gpio from DT\n");
2324
2325 ctx->supplies[0].supply = "cvcc10";
2326 ctx->supplies[1].supply = "iovcc18";
2327 ret = devm_regulator_bulk_get(dev, 2, ctx->supplies);
2328 if (ret)
2329 return ret;
2330
2331 ret = sii8620_extcon_init(ctx);
2332 if (ret < 0) {
2333 dev_err(ctx->dev, "failed to initialize EXTCON\n");
2334 return ret;
2335 }
2336
2337 i2c_set_clientdata(client, ctx);
2338
2339 ctx->bridge.funcs = &sii8620_bridge_funcs;
2340 ctx->bridge.of_node = dev->of_node;
2341 drm_bridge_add(&ctx->bridge);
2342
2343 if (!ctx->extcon)
2344 sii8620_cable_in(ctx);
2345
2346 return 0;
2347 }
2348
2349 static int sii8620_remove(struct i2c_client *client)
2350 {
2351 struct sii8620 *ctx = i2c_get_clientdata(client);
2352
2353 if (ctx->extcon) {
2354 extcon_unregister_notifier(ctx->extcon, EXTCON_DISP_MHL,
2355 &ctx->extcon_nb);
2356 flush_work(&ctx->extcon_wq);
2357 if (ctx->cable_state > 0)
2358 sii8620_cable_out(ctx);
2359 } else {
2360 sii8620_cable_out(ctx);
2361 }
2362 drm_bridge_remove(&ctx->bridge);
2363
2364 return 0;
2365 }
2366
2367 static const struct of_device_id sii8620_dt_match[] = {
2368 { .compatible = "sil,sii8620" },
2369 { },
2370 };
2371 MODULE_DEVICE_TABLE(of, sii8620_dt_match);
2372
2373 static const struct i2c_device_id sii8620_id[] = {
2374 { "sii8620", 0 },
2375 { },
2376 };
2377
2378 MODULE_DEVICE_TABLE(i2c, sii8620_id);
2379 static struct i2c_driver sii8620_driver = {
2380 .driver = {
2381 .name = "sii8620",
2382 .of_match_table = of_match_ptr(sii8620_dt_match),
2383 },
2384 .probe = sii8620_probe,
2385 .remove = sii8620_remove,
2386 .id_table = sii8620_id,
2387 };
2388
2389 module_i2c_driver(sii8620_driver);
2390 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support