tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2020 BayLibre, SAS
4 * Author: Phong LE <ple@baylibre.com>
5 * Copyright (C) 2018-2019, Artem Mygaiev
6 * Copyright (C) 2017, Fresco Logic, Incorporated.
7 *
8 */
9
10#include <linux/media-bus-format.h>
11#include <linux/module.h>
12#include <linux/device.h>
13#include <linux/interrupt.h>
14#include <linux/i2c.h>
15#include <linux/bitfield.h>
16#include <linux/property.h>
17#include <linux/regmap.h>
18#include <linux/of_graph.h>
19#include <linux/gpio/consumer.h>
20#include <linux/pinctrl/consumer.h>
21#include <linux/regulator/consumer.h>
22
23#include <drm/drm_atomic_helper.h>
24#include <drm/drm_bridge.h>
25#include <drm/drm_edid.h>
26#include <drm/drm_modes.h>
27#include <drm/drm_print.h>
28#include <drm/drm_probe_helper.h>
29
30#include <sound/hdmi-codec.h>
31
32#define IT66121_VENDOR_ID0_REG 0x00
33#define IT66121_VENDOR_ID1_REG 0x01
34#define IT66121_DEVICE_ID0_REG 0x02
35#define IT66121_DEVICE_ID1_REG 0x03
36
37#define IT66121_REVISION_MASK GENMASK(7, 4)
38#define IT66121_DEVICE_ID1_MASK GENMASK(3, 0)
39
40#define IT66121_MASTER_SEL_REG 0x10
41#define IT66121_MASTER_SEL_HOST BIT(0)
42
43#define IT66121_AFE_DRV_REG 0x61
44#define IT66121_AFE_DRV_RST BIT(4)
45#define IT66121_AFE_DRV_PWD BIT(5)
46
47#define IT66121_INPUT_MODE_REG 0x70
48#define IT66121_INPUT_MODE_RGB (0 << 6)
49#define IT66121_INPUT_MODE_YUV422 BIT(6)
50#define IT66121_INPUT_MODE_YUV444 (2 << 6)
51#define IT66121_INPUT_MODE_CCIR656 BIT(4)
52#define IT66121_INPUT_MODE_SYNCEMB BIT(3)
53#define IT66121_INPUT_MODE_DDR BIT(2)
54
55#define IT66121_INPUT_CSC_REG 0x72
56#define IT66121_INPUT_CSC_ENDITHER BIT(7)
57#define IT66121_INPUT_CSC_ENUDFILTER BIT(6)
58#define IT66121_INPUT_CSC_DNFREE_GO BIT(5)
59#define IT66121_INPUT_CSC_RGB_TO_YUV 0x02
60#define IT66121_INPUT_CSC_YUV_TO_RGB 0x03
61#define IT66121_INPUT_CSC_NO_CONV 0x00
62
63#define IT66121_AFE_XP_REG 0x62
64#define IT66121_AFE_XP_GAINBIT BIT(7)
65#define IT66121_AFE_XP_PWDPLL BIT(6)
66#define IT66121_AFE_XP_ENI BIT(5)
67#define IT66121_AFE_XP_ENO BIT(4)
68#define IT66121_AFE_XP_RESETB BIT(3)
69#define IT66121_AFE_XP_PWDI BIT(2)
70#define IT6610_AFE_XP_BYPASS BIT(0)
71
72#define IT66121_AFE_IP_REG 0x64
73#define IT66121_AFE_IP_GAINBIT BIT(7)
74#define IT66121_AFE_IP_PWDPLL BIT(6)
75#define IT66121_AFE_IP_CKSEL_05 (0 << 4)
76#define IT66121_AFE_IP_CKSEL_1 BIT(4)
77#define IT66121_AFE_IP_CKSEL_2 (2 << 4)
78#define IT66121_AFE_IP_CKSEL_2OR4 (3 << 4)
79#define IT66121_AFE_IP_ER0 BIT(3)
80#define IT66121_AFE_IP_RESETB BIT(2)
81#define IT66121_AFE_IP_ENC BIT(1)
82#define IT66121_AFE_IP_EC1 BIT(0)
83
84#define IT66121_AFE_XP_EC1_REG 0x68
85#define IT66121_AFE_XP_EC1_LOWCLK BIT(4)
86
87#define IT66121_SW_RST_REG 0x04
88#define IT66121_SW_RST_REF BIT(5)
89#define IT66121_SW_RST_AREF BIT(4)
90#define IT66121_SW_RST_VID BIT(3)
91#define IT66121_SW_RST_AUD BIT(2)
92#define IT66121_SW_RST_HDCP BIT(0)
93
94#define IT66121_DDC_COMMAND_REG 0x15
95#define IT66121_DDC_COMMAND_BURST_READ 0x0
96#define IT66121_DDC_COMMAND_EDID_READ 0x3
97#define IT66121_DDC_COMMAND_FIFO_CLR 0x9
98#define IT66121_DDC_COMMAND_SCL_PULSE 0xA
99#define IT66121_DDC_COMMAND_ABORT 0xF
100
101#define IT66121_HDCP_REG 0x20
102#define IT66121_HDCP_CPDESIRED BIT(0)
103#define IT66121_HDCP_EN1P1FEAT BIT(1)
104
105#define IT66121_INT_STATUS1_REG 0x06
106#define IT66121_INT_STATUS1_AUD_OVF BIT(7)
107#define IT66121_INT_STATUS1_DDC_NOACK BIT(5)
108#define IT66121_INT_STATUS1_DDC_FIFOERR BIT(4)
109#define IT66121_INT_STATUS1_DDC_BUSHANG BIT(2)
110#define IT66121_INT_STATUS1_RX_SENS_STATUS BIT(1)
111#define IT66121_INT_STATUS1_HPD_STATUS BIT(0)
112
113#define IT66121_DDC_HEADER_REG 0x11
114#define IT66121_DDC_HEADER_HDCP 0x74
115#define IT66121_DDC_HEADER_EDID 0xA0
116
117#define IT66121_DDC_OFFSET_REG 0x12
118#define IT66121_DDC_BYTE_REG 0x13
119#define IT66121_DDC_SEGMENT_REG 0x14
120#define IT66121_DDC_RD_FIFO_REG 0x17
121
122#define IT66121_CLK_BANK_REG 0x0F
123#define IT66121_CLK_BANK_PWROFF_RCLK BIT(6)
124#define IT66121_CLK_BANK_PWROFF_ACLK BIT(5)
125#define IT66121_CLK_BANK_PWROFF_TXCLK BIT(4)
126#define IT66121_CLK_BANK_PWROFF_CRCLK BIT(3)
127#define IT66121_CLK_BANK_0 0
128#define IT66121_CLK_BANK_1 1
129
130#define IT66121_INT_REG 0x05
131#define IT66121_INT_ACTIVE_HIGH BIT(7)
132#define IT66121_INT_OPEN_DRAIN BIT(6)
133#define IT66121_INT_TX_CLK_OFF BIT(0)
134
135#define IT66121_INT_MASK1_REG 0x09
136#define IT66121_INT_MASK1_AUD_OVF BIT(7)
137#define IT66121_INT_MASK1_DDC_NOACK BIT(5)
138#define IT66121_INT_MASK1_DDC_FIFOERR BIT(4)
139#define IT66121_INT_MASK1_DDC_BUSHANG BIT(2)
140#define IT66121_INT_MASK1_RX_SENS BIT(1)
141#define IT66121_INT_MASK1_HPD BIT(0)
142
143#define IT66121_INT_CLR1_REG 0x0C
144#define IT66121_INT_CLR1_PKTACP BIT(7)
145#define IT66121_INT_CLR1_PKTNULL BIT(6)
146#define IT66121_INT_CLR1_PKTGEN BIT(5)
147#define IT66121_INT_CLR1_KSVLISTCHK BIT(4)
148#define IT66121_INT_CLR1_AUTHDONE BIT(3)
149#define IT66121_INT_CLR1_AUTHFAIL BIT(2)
150#define IT66121_INT_CLR1_RX_SENS BIT(1)
151#define IT66121_INT_CLR1_HPD BIT(0)
152
153#define IT66121_AV_MUTE_REG 0xC1
154#define IT66121_AV_MUTE_ON BIT(0)
155#define IT66121_AV_MUTE_BLUESCR BIT(1)
156
157#define IT66121_PKT_CTS_CTRL_REG 0xC5
158#define IT66121_PKT_CTS_CTRL_SEL BIT(1)
159
160#define IT66121_PKT_GEN_CTRL_REG 0xC6
161#define IT66121_PKT_GEN_CTRL_ON BIT(0)
162#define IT66121_PKT_GEN_CTRL_RPT BIT(1)
163
164#define IT66121_AVIINFO_DB1_REG 0x158
165#define IT66121_AVIINFO_DB2_REG 0x159
166#define IT66121_AVIINFO_DB3_REG 0x15A
167#define IT66121_AVIINFO_DB4_REG 0x15B
168#define IT66121_AVIINFO_DB5_REG 0x15C
169#define IT66121_AVIINFO_CSUM_REG 0x15D
170#define IT66121_AVIINFO_DB6_REG 0x15E
171#define IT66121_AVIINFO_DB7_REG 0x15F
172#define IT66121_AVIINFO_DB8_REG 0x160
173#define IT66121_AVIINFO_DB9_REG 0x161
174#define IT66121_AVIINFO_DB10_REG 0x162
175#define IT66121_AVIINFO_DB11_REG 0x163
176#define IT66121_AVIINFO_DB12_REG 0x164
177#define IT66121_AVIINFO_DB13_REG 0x165
178
179#define IT66121_AVI_INFO_PKT_REG 0xCD
180#define IT66121_AVI_INFO_PKT_ON BIT(0)
181#define IT66121_AVI_INFO_PKT_RPT BIT(1)
182
183#define IT66121_HDMI_MODE_REG 0xC0
184#define IT66121_HDMI_MODE_HDMI BIT(0)
185
186#define IT66121_SYS_STATUS_REG 0x0E
187#define IT66121_SYS_STATUS_ACTIVE_IRQ BIT(7)
188#define IT66121_SYS_STATUS_HPDETECT BIT(6)
189#define IT66121_SYS_STATUS_SENDECTECT BIT(5)
190#define IT66121_SYS_STATUS_VID_STABLE BIT(4)
191#define IT66121_SYS_STATUS_AUD_CTS_CLR BIT(1)
192#define IT66121_SYS_STATUS_CLEAR_IRQ BIT(0)
193
194#define IT66121_DDC_STATUS_REG 0x16
195#define IT66121_DDC_STATUS_TX_DONE BIT(7)
196#define IT66121_DDC_STATUS_ACTIVE BIT(6)
197#define IT66121_DDC_STATUS_NOACK BIT(5)
198#define IT66121_DDC_STATUS_WAIT_BUS BIT(4)
199#define IT66121_DDC_STATUS_ARBI_LOSE BIT(3)
200#define IT66121_DDC_STATUS_FIFO_FULL BIT(2)
201#define IT66121_DDC_STATUS_FIFO_EMPTY BIT(1)
202#define IT66121_DDC_STATUS_FIFO_VALID BIT(0)
203
204#define IT66121_EDID_SLEEP_US 20000
205#define IT66121_EDID_TIMEOUT_US 200000
206#define IT66121_EDID_FIFO_SIZE 32
207
208#define IT66121_CLK_CTRL0_REG 0x58
209#define IT66121_CLK_CTRL0_AUTO_OVER_SAMPLING BIT(4)
210#define IT66121_CLK_CTRL0_EXT_MCLK_MASK GENMASK(3, 2)
211#define IT66121_CLK_CTRL0_EXT_MCLK_128FS (0 << 2)
212#define IT66121_CLK_CTRL0_EXT_MCLK_256FS BIT(2)
213#define IT66121_CLK_CTRL0_EXT_MCLK_512FS (2 << 2)
214#define IT66121_CLK_CTRL0_EXT_MCLK_1024FS (3 << 2)
215#define IT66121_CLK_CTRL0_AUTO_IPCLK BIT(0)
216#define IT66121_CLK_STATUS1_REG 0x5E
217#define IT66121_CLK_STATUS2_REG 0x5F
218
219#define IT66121_AUD_CTRL0_REG 0xE0
220#define IT66121_AUD_SWL (3 << 6)
221#define IT66121_AUD_16BIT (0 << 6)
222#define IT66121_AUD_18BIT BIT(6)
223#define IT66121_AUD_20BIT (2 << 6)
224#define IT66121_AUD_24BIT (3 << 6)
225#define IT66121_AUD_SPDIFTC BIT(5)
226#define IT66121_AUD_SPDIF BIT(4)
227#define IT66121_AUD_I2S (0 << 4)
228#define IT66121_AUD_EN_I2S3 BIT(3)
229#define IT66121_AUD_EN_I2S2 BIT(2)
230#define IT66121_AUD_EN_I2S1 BIT(1)
231#define IT66121_AUD_EN_I2S0 BIT(0)
232#define IT66121_AUD_CTRL0_AUD_SEL BIT(4)
233
234#define IT66121_AUD_CTRL1_REG 0xE1
235#define IT66121_AUD_FIFOMAP_REG 0xE2
236#define IT66121_AUD_CTRL3_REG 0xE3
237#define IT66121_AUD_SRCVALID_FLAT_REG 0xE4
238#define IT66121_AUD_FLAT_SRC0 BIT(4)
239#define IT66121_AUD_FLAT_SRC1 BIT(5)
240#define IT66121_AUD_FLAT_SRC2 BIT(6)
241#define IT66121_AUD_FLAT_SRC3 BIT(7)
242#define IT66121_AUD_HDAUDIO_REG 0xE5
243
244#define IT66121_AUD_PKT_CTS0_REG 0x130
245#define IT66121_AUD_PKT_CTS1_REG 0x131
246#define IT66121_AUD_PKT_CTS2_REG 0x132
247#define IT66121_AUD_PKT_N0_REG 0x133
248#define IT66121_AUD_PKT_N1_REG 0x134
249#define IT66121_AUD_PKT_N2_REG 0x135
250
251#define IT66121_AUD_CHST_MODE_REG 0x191
252#define IT66121_AUD_CHST_CAT_REG 0x192
253#define IT66121_AUD_CHST_SRCNUM_REG 0x193
254#define IT66121_AUD_CHST_CHTNUM_REG 0x194
255#define IT66121_AUD_CHST_CA_FS_REG 0x198
256#define IT66121_AUD_CHST_OFS_WL_REG 0x199
257
258#define IT66121_AUD_PKT_CTS_CNT0_REG 0x1A0
259#define IT66121_AUD_PKT_CTS_CNT1_REG 0x1A1
260#define IT66121_AUD_PKT_CTS_CNT2_REG 0x1A2
261
262#define IT66121_AUD_FS_22P05K 0x4
263#define IT66121_AUD_FS_44P1K 0x0
264#define IT66121_AUD_FS_88P2K 0x8
265#define IT66121_AUD_FS_176P4K 0xC
266#define IT66121_AUD_FS_24K 0x6
267#define IT66121_AUD_FS_48K 0x2
268#define IT66121_AUD_FS_96K 0xA
269#define IT66121_AUD_FS_192K 0xE
270#define IT66121_AUD_FS_768K 0x9
271#define IT66121_AUD_FS_32K 0x3
272#define IT66121_AUD_FS_OTHER 0x1
273
274#define IT66121_AUD_SWL_21BIT 0xD
275#define IT66121_AUD_SWL_24BIT 0xB
276#define IT66121_AUD_SWL_23BIT 0x9
277#define IT66121_AUD_SWL_22BIT 0x5
278#define IT66121_AUD_SWL_20BIT 0x3
279#define IT66121_AUD_SWL_17BIT 0xC
280#define IT66121_AUD_SWL_19BIT 0x8
281#define IT66121_AUD_SWL_18BIT 0x4
282#define IT66121_AUD_SWL_16BIT 0x2
283#define IT66121_AUD_SWL_NOT_INDICATED 0x0
284
285#define IT66121_AFE_CLK_HIGH 80000 /* Khz */
286
287enum chip_id {
288 ID_IT6610,
289 ID_IT66121,
290 ID_IT66122,
291};
292
293struct it66121_chip_info {
294 enum chip_id id;
295 u16 vid, pid;
296};
297
298struct it66121_ctx {
299 struct regmap *regmap;
300 struct drm_bridge bridge;
301 struct drm_bridge *next_bridge;
302 struct drm_connector *connector;
303 struct device *dev;
304 struct gpio_desc *gpio_reset;
305 struct i2c_client *client;
306 u32 bus_width;
307 struct mutex lock; /* Protects fields below and device registers */
308 struct hdmi_avi_infoframe hdmi_avi_infoframe;
309 struct {
310 struct platform_device *pdev;
311 u8 ch_enable;
312 u8 fs;
313 u8 swl;
314 bool auto_cts;
315 } audio;
316 enum chip_id id;
317};
318
319static const struct regmap_range_cfg it66121_regmap_banks[] = {
320 {
321 .name = "it66121",
322 .range_min = 0x00,
323 .range_max = 0x1FF,
324 .selector_reg = IT66121_CLK_BANK_REG,
325 .selector_mask = 0x1,
326 .selector_shift = 0,
327 .window_start = 0x00,
328 .window_len = 0x100,
329 },
330};
331
332static const struct regmap_config it66121_regmap_config = {
333 .val_bits = 8,
334 .reg_bits = 8,
335 .max_register = 0x1FF,
336 .ranges = it66121_regmap_banks,
337 .num_ranges = ARRAY_SIZE(it66121_regmap_banks),
338};
339
340static void it66121_hw_reset(struct it66121_ctx *ctx)
341{
342 gpiod_set_value(ctx->gpio_reset, 1);
343 msleep(20);
344 gpiod_set_value(ctx->gpio_reset, 0);
345}
346
347static inline int it66121_preamble_ddc(struct it66121_ctx *ctx)
348{
349 return regmap_write(ctx->regmap, IT66121_MASTER_SEL_REG, IT66121_MASTER_SEL_HOST);
350}
351
352static inline int it66121_fire_afe(struct it66121_ctx *ctx)
353{
354 return regmap_write(ctx->regmap, IT66121_AFE_DRV_REG, 0);
355}
356
357/* TOFIX: Handle YCbCr Input & Output */
358static int it66121_configure_input(struct it66121_ctx *ctx)
359{
360 int ret;
361 u8 mode = IT66121_INPUT_MODE_RGB;
362
363 if (ctx->bus_width == 12)
364 mode |= IT66121_INPUT_MODE_DDR;
365
366 ret = regmap_write(ctx->regmap, IT66121_INPUT_MODE_REG, mode);
367 if (ret)
368 return ret;
369
370 return regmap_write(ctx->regmap, IT66121_INPUT_CSC_REG, IT66121_INPUT_CSC_NO_CONV);
371}
372
373/**
374 * it66121_configure_afe() - Configure the analog front end
375 * @ctx: it66121_ctx object
376 * @mode: mode to configure
377 *
378 * RETURNS:
379 * zero if success, a negative error code otherwise.
380 */
381static int it66121_configure_afe(struct it66121_ctx *ctx,
382 const struct drm_display_mode *mode)
383{
384 int ret;
385
386 ret = regmap_write(ctx->regmap, IT66121_AFE_DRV_REG,
387 IT66121_AFE_DRV_RST);
388 if (ret)
389 return ret;
390
391 if (mode->clock > IT66121_AFE_CLK_HIGH) {
392 ret = regmap_write_bits(ctx->regmap, IT66121_AFE_XP_REG,
393 IT66121_AFE_XP_GAINBIT |
394 IT66121_AFE_XP_ENO,
395 IT66121_AFE_XP_GAINBIT);
396 if (ret)
397 return ret;
398
399 ret = regmap_write_bits(ctx->regmap, IT66121_AFE_IP_REG,
400 IT66121_AFE_IP_GAINBIT |
401 IT66121_AFE_IP_ER0,
402 IT66121_AFE_IP_GAINBIT);
403 if (ret)
404 return ret;
405
406 if (ctx->id == ID_IT66121 || ctx->id == ID_IT66122) {
407 ret = regmap_write_bits(ctx->regmap, IT66121_AFE_IP_REG,
408 IT66121_AFE_IP_EC1, 0);
409 if (ret)
410 return ret;
411
412 ret = regmap_write_bits(ctx->regmap, IT66121_AFE_XP_EC1_REG,
413 IT66121_AFE_XP_EC1_LOWCLK, 0x80);
414 if (ret)
415 return ret;
416 }
417 } else {
418 ret = regmap_write_bits(ctx->regmap, IT66121_AFE_XP_REG,
419 IT66121_AFE_XP_GAINBIT |
420 IT66121_AFE_XP_ENO,
421 IT66121_AFE_XP_ENO);
422 if (ret)
423 return ret;
424
425 ret = regmap_write_bits(ctx->regmap, IT66121_AFE_IP_REG,
426 IT66121_AFE_IP_GAINBIT |
427 IT66121_AFE_IP_ER0,
428 IT66121_AFE_IP_ER0);
429 if (ret)
430 return ret;
431
432 if (ctx->id == ID_IT66121 || ctx->id == ID_IT66122) {
433 ret = regmap_write_bits(ctx->regmap, IT66121_AFE_IP_REG,
434 IT66121_AFE_IP_EC1,
435 IT66121_AFE_IP_EC1);
436 if (ret)
437 return ret;
438
439 ret = regmap_write_bits(ctx->regmap, IT66121_AFE_XP_EC1_REG,
440 IT66121_AFE_XP_EC1_LOWCLK,
441 IT66121_AFE_XP_EC1_LOWCLK);
442 if (ret)
443 return ret;
444 }
445 }
446
447 /* Clear reset flags */
448 ret = regmap_write_bits(ctx->regmap, IT66121_SW_RST_REG,
449 IT66121_SW_RST_REF | IT66121_SW_RST_VID, 0);
450 if (ret)
451 return ret;
452
453 if (ctx->id == ID_IT6610) {
454 ret = regmap_write_bits(ctx->regmap, IT66121_AFE_XP_REG,
455 IT6610_AFE_XP_BYPASS,
456 IT6610_AFE_XP_BYPASS);
457 if (ret)
458 return ret;
459 }
460
461 return it66121_fire_afe(ctx);
462}
463
464static inline int it66121_wait_ddc_ready(struct it66121_ctx *ctx)
465{
466 int ret, val;
467 u32 error = IT66121_DDC_STATUS_NOACK | IT66121_DDC_STATUS_WAIT_BUS |
468 IT66121_DDC_STATUS_ARBI_LOSE;
469 u32 done = IT66121_DDC_STATUS_TX_DONE;
470
471 ret = regmap_read_poll_timeout(ctx->regmap, IT66121_DDC_STATUS_REG, val,
472 val & (error | done), IT66121_EDID_SLEEP_US,
473 IT66121_EDID_TIMEOUT_US);
474 if (ret)
475 return ret;
476
477 if (val & error)
478 return -EAGAIN;
479
480 return 0;
481}
482
483static int it66121_abort_ddc_ops(struct it66121_ctx *ctx)
484{
485 int ret;
486 unsigned int swreset, cpdesire;
487
488 ret = regmap_read(ctx->regmap, IT66121_SW_RST_REG, &swreset);
489 if (ret)
490 return ret;
491
492 ret = regmap_read(ctx->regmap, IT66121_HDCP_REG, &cpdesire);
493 if (ret)
494 return ret;
495
496 ret = regmap_write(ctx->regmap, IT66121_HDCP_REG,
497 cpdesire & (~IT66121_HDCP_CPDESIRED & 0xFF));
498 if (ret)
499 return ret;
500
501 ret = regmap_write(ctx->regmap, IT66121_SW_RST_REG,
502 (swreset | IT66121_SW_RST_HDCP));
503 if (ret)
504 return ret;
505
506 ret = it66121_preamble_ddc(ctx);
507 if (ret)
508 return ret;
509
510 ret = regmap_write(ctx->regmap, IT66121_DDC_COMMAND_REG,
511 IT66121_DDC_COMMAND_ABORT);
512 if (ret)
513 return ret;
514
515 return it66121_wait_ddc_ready(ctx);
516}
517
518static int it66121_get_edid_block(void *context, u8 *buf,
519 unsigned int block, size_t len)
520{
521 struct it66121_ctx *ctx = context;
522 int remain = len;
523 int offset = 0;
524 int ret, cnt;
525
526 offset = (block % 2) * len;
527 block = block / 2;
528
529 while (remain > 0) {
530 cnt = (remain > IT66121_EDID_FIFO_SIZE) ?
531 IT66121_EDID_FIFO_SIZE : remain;
532
533 ret = regmap_write(ctx->regmap, IT66121_DDC_COMMAND_REG,
534 IT66121_DDC_COMMAND_FIFO_CLR);
535 if (ret)
536 return ret;
537
538 ret = it66121_wait_ddc_ready(ctx);
539 if (ret)
540 return ret;
541
542 ret = regmap_write(ctx->regmap, IT66121_DDC_OFFSET_REG, offset);
543 if (ret)
544 return ret;
545
546 ret = regmap_write(ctx->regmap, IT66121_DDC_BYTE_REG, cnt);
547 if (ret)
548 return ret;
549
550 ret = regmap_write(ctx->regmap, IT66121_DDC_SEGMENT_REG, block);
551 if (ret)
552 return ret;
553
554 ret = regmap_write(ctx->regmap, IT66121_DDC_COMMAND_REG,
555 IT66121_DDC_COMMAND_EDID_READ);
556 if (ret)
557 return ret;
558
559 offset += cnt;
560 remain -= cnt;
561
562 ret = it66121_wait_ddc_ready(ctx);
563 if (ret) {
564 it66121_abort_ddc_ops(ctx);
565 return ret;
566 }
567
568 ret = regmap_noinc_read(ctx->regmap, IT66121_DDC_RD_FIFO_REG,
569 buf, cnt);
570 if (ret)
571 return ret;
572
573 buf += cnt;
574 }
575
576 return 0;
577}
578
579static bool it66121_is_hpd_detect(struct it66121_ctx *ctx)
580{
581 int val;
582
583 if (regmap_read(ctx->regmap, IT66121_SYS_STATUS_REG, &val))
584 return false;
585
586 return val & IT66121_SYS_STATUS_HPDETECT;
587}
588
589static int it66121_bridge_attach(struct drm_bridge *bridge,
590 struct drm_encoder *encoder,
591 enum drm_bridge_attach_flags flags)
592{
593 struct it66121_ctx *ctx = container_of(bridge, struct it66121_ctx, bridge);
594 int ret;
595
596 if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR))
597 return -EINVAL;
598
599 ret = drm_bridge_attach(encoder, ctx->next_bridge, bridge, flags);
600 if (ret)
601 return ret;
602
603 if (ctx->id == ID_IT66121 || ctx->id == ID_IT66122) {
604 ret = regmap_write_bits(ctx->regmap, IT66121_CLK_BANK_REG,
605 IT66121_CLK_BANK_PWROFF_RCLK, 0);
606 if (ret)
607 return ret;
608 }
609
610 ret = regmap_write_bits(ctx->regmap, IT66121_INT_REG,
611 IT66121_INT_TX_CLK_OFF, 0);
612 if (ret)
613 return ret;
614
615 ret = regmap_write_bits(ctx->regmap, IT66121_AFE_DRV_REG,
616 IT66121_AFE_DRV_PWD, 0);
617 if (ret)
618 return ret;
619
620 ret = regmap_write_bits(ctx->regmap, IT66121_AFE_XP_REG,
621 IT66121_AFE_XP_PWDI | IT66121_AFE_XP_PWDPLL, 0);
622 if (ret)
623 return ret;
624
625 ret = regmap_write_bits(ctx->regmap, IT66121_AFE_IP_REG,
626 IT66121_AFE_IP_PWDPLL, 0);
627 if (ret)
628 return ret;
629
630 ret = regmap_write_bits(ctx->regmap, IT66121_AFE_DRV_REG,
631 IT66121_AFE_DRV_RST, 0);
632 if (ret)
633 return ret;
634
635 ret = regmap_write_bits(ctx->regmap, IT66121_AFE_XP_REG,
636 IT66121_AFE_XP_RESETB, IT66121_AFE_XP_RESETB);
637 if (ret)
638 return ret;
639
640 ret = regmap_write_bits(ctx->regmap, IT66121_AFE_IP_REG,
641 IT66121_AFE_IP_RESETB, IT66121_AFE_IP_RESETB);
642 if (ret)
643 return ret;
644
645 ret = regmap_write_bits(ctx->regmap, IT66121_SW_RST_REG,
646 IT66121_SW_RST_REF,
647 IT66121_SW_RST_REF);
648 if (ret)
649 return ret;
650
651 /* Per programming manual, sleep here for bridge to settle */
652 msleep(50);
653
654 return 0;
655}
656
657static int it66121_set_mute(struct it66121_ctx *ctx, bool mute)
658{
659 int ret;
660 unsigned int val = 0;
661
662 if (mute)
663 val = IT66121_AV_MUTE_ON;
664
665 ret = regmap_write_bits(ctx->regmap, IT66121_AV_MUTE_REG, IT66121_AV_MUTE_ON, val);
666 if (ret)
667 return ret;
668
669 return regmap_write(ctx->regmap, IT66121_PKT_GEN_CTRL_REG,
670 IT66121_PKT_GEN_CTRL_ON | IT66121_PKT_GEN_CTRL_RPT);
671}
672
673#define MAX_OUTPUT_SEL_FORMATS 1
674
675static u32 *it66121_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
676 struct drm_bridge_state *bridge_state,
677 struct drm_crtc_state *crtc_state,
678 struct drm_connector_state *conn_state,
679 unsigned int *num_output_fmts)
680{
681 u32 *output_fmts;
682
683 output_fmts = kcalloc(MAX_OUTPUT_SEL_FORMATS, sizeof(*output_fmts),
684 GFP_KERNEL);
685 if (!output_fmts)
686 return NULL;
687
688 /* TOFIX handle more than MEDIA_BUS_FMT_RGB888_1X24 as output format */
689 output_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24;
690 *num_output_fmts = 1;
691
692 return output_fmts;
693}
694
695#define MAX_INPUT_SEL_FORMATS 1
696
697static u32 *it66121_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
698 struct drm_bridge_state *bridge_state,
699 struct drm_crtc_state *crtc_state,
700 struct drm_connector_state *conn_state,
701 u32 output_fmt,
702 unsigned int *num_input_fmts)
703{
704 struct it66121_ctx *ctx = container_of(bridge, struct it66121_ctx, bridge);
705 u32 *input_fmts;
706
707 *num_input_fmts = 0;
708
709 input_fmts = kcalloc(MAX_INPUT_SEL_FORMATS, sizeof(*input_fmts),
710 GFP_KERNEL);
711 if (!input_fmts)
712 return NULL;
713
714 if (ctx->bus_width == 12)
715 /* IT66121FN Datasheet specifies Little-Endian ordering */
716 input_fmts[0] = MEDIA_BUS_FMT_RGB888_2X12_LE;
717 else
718 /* TOFIX support more input bus formats in 24bit width */
719 input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24;
720 *num_input_fmts = 1;
721
722 return input_fmts;
723}
724
725static void it66121_bridge_enable(struct drm_bridge *bridge,
726 struct drm_atomic_state *state)
727{
728 struct it66121_ctx *ctx = container_of(bridge, struct it66121_ctx, bridge);
729
730 ctx->connector = drm_atomic_get_new_connector_for_encoder(state, bridge->encoder);
731
732 it66121_set_mute(ctx, false);
733}
734
735static void it66121_bridge_disable(struct drm_bridge *bridge,
736 struct drm_atomic_state *state)
737{
738 struct it66121_ctx *ctx = container_of(bridge, struct it66121_ctx, bridge);
739
740 it66121_set_mute(ctx, true);
741
742 ctx->connector = NULL;
743}
744
745static int it66121_bridge_check(struct drm_bridge *bridge,
746 struct drm_bridge_state *bridge_state,
747 struct drm_crtc_state *crtc_state,
748 struct drm_connector_state *conn_state)
749{
750 struct it66121_ctx *ctx = container_of(bridge, struct it66121_ctx, bridge);
751
752 if (ctx->id == ID_IT6610) {
753 /* The IT6610 only supports these settings */
754 bridge_state->input_bus_cfg.flags |= DRM_BUS_FLAG_DE_HIGH |
755 DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE;
756 bridge_state->input_bus_cfg.flags &=
757 ~DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE;
758 }
759
760 return 0;
761}
762
763static
764void it66121_bridge_mode_set(struct drm_bridge *bridge,
765 const struct drm_display_mode *mode,
766 const struct drm_display_mode *adjusted_mode)
767{
768 u8 buf[HDMI_INFOFRAME_SIZE(AVI)];
769 struct it66121_ctx *ctx = container_of(bridge, struct it66121_ctx, bridge);
770 int ret;
771
772 mutex_lock(&ctx->lock);
773
774 ret = drm_hdmi_avi_infoframe_from_display_mode(&ctx->hdmi_avi_infoframe, ctx->connector,
775 adjusted_mode);
776 if (ret) {
777 DRM_ERROR("Failed to setup AVI infoframe: %d\n", ret);
778 goto unlock;
779 }
780
781 ret = hdmi_avi_infoframe_pack(&ctx->hdmi_avi_infoframe, buf, sizeof(buf));
782 if (ret < 0) {
783 DRM_ERROR("Failed to pack infoframe: %d\n", ret);
784 goto unlock;
785 }
786
787 /* Write new AVI infoframe packet */
788 ret = regmap_bulk_write(ctx->regmap, IT66121_AVIINFO_DB1_REG,
789 &buf[HDMI_INFOFRAME_HEADER_SIZE],
790 HDMI_AVI_INFOFRAME_SIZE);
791 if (ret)
792 goto unlock;
793
794 if (regmap_write(ctx->regmap, IT66121_AVIINFO_CSUM_REG, buf[3]))
795 goto unlock;
796
797 /* Enable AVI infoframe */
798 if (regmap_write(ctx->regmap, IT66121_AVI_INFO_PKT_REG,
799 IT66121_AVI_INFO_PKT_ON | IT66121_AVI_INFO_PKT_RPT))
800 goto unlock;
801
802 /* Set TX mode to HDMI */
803 if (regmap_write(ctx->regmap, IT66121_HDMI_MODE_REG, IT66121_HDMI_MODE_HDMI))
804 goto unlock;
805
806 if ((ctx->id == ID_IT66121 || ctx->id == ID_IT66122) &&
807 regmap_write_bits(ctx->regmap, IT66121_CLK_BANK_REG,
808 IT66121_CLK_BANK_PWROFF_TXCLK,
809 IT66121_CLK_BANK_PWROFF_TXCLK)) {
810 goto unlock;
811 }
812
813 if (it66121_configure_input(ctx))
814 goto unlock;
815
816 if (it66121_configure_afe(ctx, adjusted_mode))
817 goto unlock;
818
819 if ((ctx->id == ID_IT66121 || ctx->id == ID_IT66122) &&
820 regmap_write_bits(ctx->regmap, IT66121_CLK_BANK_REG,
821 IT66121_CLK_BANK_PWROFF_TXCLK, 0)) {
822 goto unlock;
823 }
824
825unlock:
826 mutex_unlock(&ctx->lock);
827}
828
829static enum drm_mode_status it66121_bridge_mode_valid(struct drm_bridge *bridge,
830 const struct drm_display_info *info,
831 const struct drm_display_mode *mode)
832{
833 struct it66121_ctx *ctx = container_of(bridge, struct it66121_ctx, bridge);
834 unsigned long max_clock;
835
836 max_clock = (ctx->bus_width == 12) ? 74250 : 148500;
837
838 if (mode->clock > max_clock)
839 return MODE_CLOCK_HIGH;
840
841 if (mode->clock < 25000)
842 return MODE_CLOCK_LOW;
843
844 return MODE_OK;
845}
846
847static enum drm_connector_status
848it66121_bridge_detect(struct drm_bridge *bridge, struct drm_connector *connector)
849{
850 struct it66121_ctx *ctx = container_of(bridge, struct it66121_ctx, bridge);
851
852 return it66121_is_hpd_detect(ctx) ? connector_status_connected
853 : connector_status_disconnected;
854}
855
856static void it66121_bridge_hpd_enable(struct drm_bridge *bridge)
857{
858 struct it66121_ctx *ctx = container_of(bridge, struct it66121_ctx, bridge);
859 int ret;
860
861 ret = regmap_write_bits(ctx->regmap, IT66121_INT_MASK1_REG, IT66121_INT_MASK1_HPD, 0);
862 if (ret)
863 dev_err(ctx->dev, "failed to enable HPD IRQ\n");
864}
865
866static void it66121_bridge_hpd_disable(struct drm_bridge *bridge)
867{
868 struct it66121_ctx *ctx = container_of(bridge, struct it66121_ctx, bridge);
869 int ret;
870
871 ret = regmap_write_bits(ctx->regmap, IT66121_INT_MASK1_REG,
872 IT66121_INT_MASK1_HPD, IT66121_INT_MASK1_HPD);
873 if (ret)
874 dev_err(ctx->dev, "failed to disable HPD IRQ\n");
875}
876
877static const struct drm_edid *it66121_bridge_edid_read(struct drm_bridge *bridge,
878 struct drm_connector *connector)
879{
880 struct it66121_ctx *ctx = container_of(bridge, struct it66121_ctx, bridge);
881 const struct drm_edid *drm_edid;
882 int ret;
883
884 mutex_lock(&ctx->lock);
885 ret = it66121_preamble_ddc(ctx);
886 if (ret) {
887 drm_edid = NULL;
888 goto out_unlock;
889 }
890
891 ret = regmap_write(ctx->regmap, IT66121_DDC_HEADER_REG,
892 IT66121_DDC_HEADER_EDID);
893 if (ret) {
894 drm_edid = NULL;
895 goto out_unlock;
896 }
897
898 drm_edid = drm_edid_read_custom(connector, it66121_get_edid_block, ctx);
899
900out_unlock:
901 mutex_unlock(&ctx->lock);
902
903 return drm_edid;
904}
905
906static const struct drm_bridge_funcs it66121_bridge_funcs = {
907 .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
908 .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
909 .atomic_reset = drm_atomic_helper_bridge_reset,
910 .attach = it66121_bridge_attach,
911 .atomic_get_output_bus_fmts = it66121_bridge_atomic_get_output_bus_fmts,
912 .atomic_get_input_bus_fmts = it66121_bridge_atomic_get_input_bus_fmts,
913 .atomic_enable = it66121_bridge_enable,
914 .atomic_disable = it66121_bridge_disable,
915 .atomic_check = it66121_bridge_check,
916 .mode_set = it66121_bridge_mode_set,
917 .mode_valid = it66121_bridge_mode_valid,
918 .detect = it66121_bridge_detect,
919 .edid_read = it66121_bridge_edid_read,
920 .hpd_enable = it66121_bridge_hpd_enable,
921 .hpd_disable = it66121_bridge_hpd_disable,
922};
923
924static irqreturn_t it66121_irq_threaded_handler(int irq, void *dev_id)
925{
926 int ret;
927 unsigned int val;
928 struct it66121_ctx *ctx = dev_id;
929 struct device *dev = ctx->dev;
930 enum drm_connector_status status;
931 bool event = false;
932
933 mutex_lock(&ctx->lock);
934
935 ret = regmap_read(ctx->regmap, IT66121_SYS_STATUS_REG, &val);
936 if (ret)
937 goto unlock;
938
939 if (!(val & IT66121_SYS_STATUS_ACTIVE_IRQ))
940 goto unlock;
941
942 ret = regmap_read(ctx->regmap, IT66121_INT_STATUS1_REG, &val);
943 if (ret) {
944 dev_err(dev, "Cannot read STATUS1_REG %d\n", ret);
945 } else if (val & IT66121_INT_STATUS1_HPD_STATUS) {
946 regmap_write_bits(ctx->regmap, IT66121_INT_CLR1_REG,
947 IT66121_INT_CLR1_HPD, IT66121_INT_CLR1_HPD);
948
949 status = it66121_is_hpd_detect(ctx) ? connector_status_connected
950 : connector_status_disconnected;
951
952 event = true;
953 }
954
955 regmap_write_bits(ctx->regmap, IT66121_SYS_STATUS_REG,
956 IT66121_SYS_STATUS_CLEAR_IRQ,
957 IT66121_SYS_STATUS_CLEAR_IRQ);
958
959unlock:
960 mutex_unlock(&ctx->lock);
961
962 if (event)
963 drm_bridge_hpd_notify(&ctx->bridge, status);
964
965 return IRQ_HANDLED;
966}
967
968static int it661221_set_chstat(struct it66121_ctx *ctx, u8 iec60958_chstat[])
969{
970 int ret;
971
972 ret = regmap_write(ctx->regmap, IT66121_AUD_CHST_MODE_REG, iec60958_chstat[0] & 0x7C);
973 if (ret)
974 return ret;
975
976 ret = regmap_write(ctx->regmap, IT66121_AUD_CHST_CAT_REG, iec60958_chstat[1]);
977 if (ret)
978 return ret;
979
980 ret = regmap_write(ctx->regmap, IT66121_AUD_CHST_SRCNUM_REG, iec60958_chstat[2] & 0x0F);
981 if (ret)
982 return ret;
983
984 ret = regmap_write(ctx->regmap, IT66121_AUD_CHST_CHTNUM_REG,
985 (iec60958_chstat[2] >> 4) & 0x0F);
986 if (ret)
987 return ret;
988
989 ret = regmap_write(ctx->regmap, IT66121_AUD_CHST_CA_FS_REG, iec60958_chstat[3]);
990 if (ret)
991 return ret;
992
993 return regmap_write(ctx->regmap, IT66121_AUD_CHST_OFS_WL_REG, iec60958_chstat[4]);
994}
995
996static int it661221_set_lpcm_audio(struct it66121_ctx *ctx, u8 audio_src_num, u8 audio_swl)
997{
998 int ret;
999 unsigned int audio_enable = 0;
1000 unsigned int audio_format = 0;
1001
1002 switch (audio_swl) {
1003 case 16:
1004 audio_enable |= IT66121_AUD_16BIT;
1005 break;
1006 case 18:
1007 audio_enable |= IT66121_AUD_18BIT;
1008 break;
1009 case 20:
1010 audio_enable |= IT66121_AUD_20BIT;
1011 break;
1012 case 24:
1013 default:
1014 audio_enable |= IT66121_AUD_24BIT;
1015 break;
1016 }
1017
1018 audio_format |= 0x40;
1019 switch (audio_src_num) {
1020 case 4:
1021 audio_enable |= IT66121_AUD_EN_I2S3 | IT66121_AUD_EN_I2S2 |
1022 IT66121_AUD_EN_I2S1 | IT66121_AUD_EN_I2S0;
1023 break;
1024 case 3:
1025 audio_enable |= IT66121_AUD_EN_I2S2 | IT66121_AUD_EN_I2S1 |
1026 IT66121_AUD_EN_I2S0;
1027 break;
1028 case 2:
1029 audio_enable |= IT66121_AUD_EN_I2S1 | IT66121_AUD_EN_I2S0;
1030 break;
1031 case 1:
1032 default:
1033 audio_format &= ~0x40;
1034 audio_enable |= IT66121_AUD_EN_I2S0;
1035 break;
1036 }
1037
1038 audio_format |= 0x01;
1039 ctx->audio.ch_enable = audio_enable;
1040
1041 ret = regmap_write(ctx->regmap, IT66121_AUD_CTRL0_REG, audio_enable & 0xF0);
1042 if (ret)
1043 return ret;
1044
1045 ret = regmap_write(ctx->regmap, IT66121_AUD_CTRL1_REG, audio_format);
1046 if (ret)
1047 return ret;
1048
1049 ret = regmap_write(ctx->regmap, IT66121_AUD_FIFOMAP_REG, 0xE4);
1050 if (ret)
1051 return ret;
1052
1053 ret = regmap_write(ctx->regmap, IT66121_AUD_CTRL3_REG, 0x00);
1054 if (ret)
1055 return ret;
1056
1057 ret = regmap_write(ctx->regmap, IT66121_AUD_SRCVALID_FLAT_REG, 0x00);
1058 if (ret)
1059 return ret;
1060
1061 return regmap_write(ctx->regmap, IT66121_AUD_HDAUDIO_REG, 0x00);
1062}
1063
1064static int it661221_set_ncts(struct it66121_ctx *ctx, u8 fs)
1065{
1066 int ret;
1067 unsigned int n;
1068
1069 switch (fs) {
1070 case IT66121_AUD_FS_32K:
1071 n = 4096;
1072 break;
1073 case IT66121_AUD_FS_44P1K:
1074 n = 6272;
1075 break;
1076 case IT66121_AUD_FS_48K:
1077 n = 6144;
1078 break;
1079 case IT66121_AUD_FS_88P2K:
1080 n = 12544;
1081 break;
1082 case IT66121_AUD_FS_96K:
1083 n = 12288;
1084 break;
1085 case IT66121_AUD_FS_176P4K:
1086 n = 25088;
1087 break;
1088 case IT66121_AUD_FS_192K:
1089 n = 24576;
1090 break;
1091 case IT66121_AUD_FS_768K:
1092 n = 24576;
1093 break;
1094 default:
1095 n = 6144;
1096 break;
1097 }
1098
1099 ret = regmap_write(ctx->regmap, IT66121_AUD_PKT_N0_REG, (u8)((n) & 0xFF));
1100 if (ret)
1101 return ret;
1102
1103 ret = regmap_write(ctx->regmap, IT66121_AUD_PKT_N1_REG, (u8)((n >> 8) & 0xFF));
1104 if (ret)
1105 return ret;
1106
1107 ret = regmap_write(ctx->regmap, IT66121_AUD_PKT_N2_REG, (u8)((n >> 16) & 0xF));
1108 if (ret)
1109 return ret;
1110
1111 if (ctx->audio.auto_cts) {
1112 u8 loop_cnt = 255;
1113 u8 cts_stable_cnt = 0;
1114 unsigned int sum_cts = 0;
1115 unsigned int cts = 0;
1116 unsigned int last_cts = 0;
1117 unsigned int diff;
1118 unsigned int val;
1119
1120 while (loop_cnt--) {
1121 msleep(30);
1122 regmap_read(ctx->regmap, IT66121_AUD_PKT_CTS_CNT2_REG, &val);
1123 cts = val << 12;
1124 regmap_read(ctx->regmap, IT66121_AUD_PKT_CTS_CNT1_REG, &val);
1125 cts |= val << 4;
1126 regmap_read(ctx->regmap, IT66121_AUD_PKT_CTS_CNT0_REG, &val);
1127 cts |= val >> 4;
1128 if (cts == 0) {
1129 continue;
1130 } else {
1131 if (last_cts > cts)
1132 diff = last_cts - cts;
1133 else
1134 diff = cts - last_cts;
1135 last_cts = cts;
1136 if (diff < 5) {
1137 cts_stable_cnt++;
1138 sum_cts += cts;
1139 } else {
1140 cts_stable_cnt = 0;
1141 sum_cts = 0;
1142 continue;
1143 }
1144
1145 if (cts_stable_cnt >= 32) {
1146 last_cts = (sum_cts >> 5);
1147 break;
1148 }
1149 }
1150 }
1151
1152 regmap_write(ctx->regmap, IT66121_AUD_PKT_CTS0_REG, (u8)((last_cts) & 0xFF));
1153 regmap_write(ctx->regmap, IT66121_AUD_PKT_CTS1_REG, (u8)((last_cts >> 8) & 0xFF));
1154 regmap_write(ctx->regmap, IT66121_AUD_PKT_CTS2_REG, (u8)((last_cts >> 16) & 0x0F));
1155 }
1156
1157 ret = regmap_write(ctx->regmap, 0xF8, 0xC3);
1158 if (ret)
1159 return ret;
1160
1161 ret = regmap_write(ctx->regmap, 0xF8, 0xA5);
1162 if (ret)
1163 return ret;
1164
1165 if (ctx->audio.auto_cts) {
1166 ret = regmap_write_bits(ctx->regmap, IT66121_PKT_CTS_CTRL_REG,
1167 IT66121_PKT_CTS_CTRL_SEL,
1168 1);
1169 } else {
1170 ret = regmap_write_bits(ctx->regmap, IT66121_PKT_CTS_CTRL_REG,
1171 IT66121_PKT_CTS_CTRL_SEL,
1172 0);
1173 }
1174
1175 if (ret)
1176 return ret;
1177
1178 return regmap_write(ctx->regmap, 0xF8, 0xFF);
1179}
1180
1181static int it661221_audio_output_enable(struct it66121_ctx *ctx, bool enable)
1182{
1183 int ret;
1184
1185 if (enable) {
1186 ret = regmap_write_bits(ctx->regmap, IT66121_SW_RST_REG,
1187 IT66121_SW_RST_AUD | IT66121_SW_RST_AREF,
1188 0);
1189 if (ret)
1190 return ret;
1191
1192 ret = regmap_write_bits(ctx->regmap, IT66121_AUD_CTRL0_REG,
1193 IT66121_AUD_EN_I2S3 | IT66121_AUD_EN_I2S2 |
1194 IT66121_AUD_EN_I2S1 | IT66121_AUD_EN_I2S0,
1195 ctx->audio.ch_enable);
1196 } else {
1197 ret = regmap_write_bits(ctx->regmap, IT66121_AUD_CTRL0_REG,
1198 IT66121_AUD_EN_I2S3 | IT66121_AUD_EN_I2S2 |
1199 IT66121_AUD_EN_I2S1 | IT66121_AUD_EN_I2S0,
1200 ctx->audio.ch_enable & 0xF0);
1201 if (ret)
1202 return ret;
1203
1204 ret = regmap_write_bits(ctx->regmap, IT66121_SW_RST_REG,
1205 IT66121_SW_RST_AUD | IT66121_SW_RST_AREF,
1206 IT66121_SW_RST_AUD | IT66121_SW_RST_AREF);
1207 }
1208
1209 return ret;
1210}
1211
1212static int it661221_audio_ch_enable(struct it66121_ctx *ctx, bool enable)
1213{
1214 int ret;
1215
1216 if (enable) {
1217 ret = regmap_write(ctx->regmap, IT66121_AUD_SRCVALID_FLAT_REG, 0);
1218 if (ret)
1219 return ret;
1220
1221 ret = regmap_write(ctx->regmap, IT66121_AUD_CTRL0_REG, ctx->audio.ch_enable);
1222 } else {
1223 ret = regmap_write(ctx->regmap, IT66121_AUD_CTRL0_REG, ctx->audio.ch_enable & 0xF0);
1224 }
1225
1226 return ret;
1227}
1228
1229static int it66121_audio_hw_params(struct device *dev, void *data,
1230 struct hdmi_codec_daifmt *daifmt,
1231 struct hdmi_codec_params *params)
1232{
1233 u8 fs;
1234 u8 swl;
1235 int ret;
1236 struct it66121_ctx *ctx = dev_get_drvdata(dev);
1237 static u8 iec60958_chstat[5];
1238 unsigned int channels = params->channels;
1239 unsigned int sample_rate = params->sample_rate;
1240 unsigned int sample_width = params->sample_width;
1241
1242 mutex_lock(&ctx->lock);
1243 dev_dbg(dev, "%s: %u, %u, %u, %u\n", __func__,
1244 daifmt->fmt, sample_rate, sample_width, channels);
1245
1246 switch (daifmt->fmt) {
1247 case HDMI_I2S:
1248 dev_dbg(dev, "Using HDMI I2S\n");
1249 break;
1250 default:
1251 dev_err(dev, "Invalid or unsupported DAI format %d\n", daifmt->fmt);
1252 ret = -EINVAL;
1253 goto out;
1254 }
1255
1256 // Set audio clock recovery (N/CTS)
1257 ret = regmap_write(ctx->regmap, IT66121_CLK_CTRL0_REG,
1258 IT66121_CLK_CTRL0_AUTO_OVER_SAMPLING |
1259 IT66121_CLK_CTRL0_EXT_MCLK_256FS |
1260 IT66121_CLK_CTRL0_AUTO_IPCLK);
1261 if (ret)
1262 goto out;
1263
1264 ret = regmap_write_bits(ctx->regmap, IT66121_AUD_CTRL0_REG,
1265 IT66121_AUD_CTRL0_AUD_SEL, 0); // remove spdif selection
1266 if (ret)
1267 goto out;
1268
1269 switch (sample_rate) {
1270 case 44100L:
1271 fs = IT66121_AUD_FS_44P1K;
1272 break;
1273 case 88200L:
1274 fs = IT66121_AUD_FS_88P2K;
1275 break;
1276 case 176400L:
1277 fs = IT66121_AUD_FS_176P4K;
1278 break;
1279 case 32000L:
1280 fs = IT66121_AUD_FS_32K;
1281 break;
1282 case 48000L:
1283 fs = IT66121_AUD_FS_48K;
1284 break;
1285 case 96000L:
1286 fs = IT66121_AUD_FS_96K;
1287 break;
1288 case 192000L:
1289 fs = IT66121_AUD_FS_192K;
1290 break;
1291 case 768000L:
1292 fs = IT66121_AUD_FS_768K;
1293 break;
1294 default:
1295 fs = IT66121_AUD_FS_48K;
1296 break;
1297 }
1298
1299 ctx->audio.fs = fs;
1300 ret = it661221_set_ncts(ctx, fs);
1301 if (ret) {
1302 dev_err(dev, "Failed to set N/CTS: %d\n", ret);
1303 goto out;
1304 }
1305
1306 // Set audio format register (except audio channel enable)
1307 ret = it661221_set_lpcm_audio(ctx, (channels + 1) / 2, sample_width);
1308 if (ret) {
1309 dev_err(dev, "Failed to set LPCM audio: %d\n", ret);
1310 goto out;
1311 }
1312
1313 // Set audio channel status
1314 iec60958_chstat[0] = 0;
1315 if ((channels + 1) / 2 == 1)
1316 iec60958_chstat[0] |= 0x1;
1317 iec60958_chstat[0] &= ~(1 << 1);
1318 iec60958_chstat[1] = 0;
1319 iec60958_chstat[2] = (channels + 1) / 2;
1320 iec60958_chstat[2] |= (channels << 4) & 0xF0;
1321 iec60958_chstat[3] = fs;
1322
1323 switch (sample_width) {
1324 case 21L:
1325 swl = IT66121_AUD_SWL_21BIT;
1326 break;
1327 case 24L:
1328 swl = IT66121_AUD_SWL_24BIT;
1329 break;
1330 case 23L:
1331 swl = IT66121_AUD_SWL_23BIT;
1332 break;
1333 case 22L:
1334 swl = IT66121_AUD_SWL_22BIT;
1335 break;
1336 case 20L:
1337 swl = IT66121_AUD_SWL_20BIT;
1338 break;
1339 case 17L:
1340 swl = IT66121_AUD_SWL_17BIT;
1341 break;
1342 case 19L:
1343 swl = IT66121_AUD_SWL_19BIT;
1344 break;
1345 case 18L:
1346 swl = IT66121_AUD_SWL_18BIT;
1347 break;
1348 case 16L:
1349 swl = IT66121_AUD_SWL_16BIT;
1350 break;
1351 default:
1352 swl = IT66121_AUD_SWL_NOT_INDICATED;
1353 break;
1354 }
1355
1356 iec60958_chstat[4] = (((~fs) << 4) & 0xF0) | swl;
1357 ret = it661221_set_chstat(ctx, iec60958_chstat);
1358 if (ret) {
1359 dev_err(dev, "Failed to set channel status: %d\n", ret);
1360 goto out;
1361 }
1362
1363 // Enable audio channel enable while input clock stable (if SPDIF).
1364 ret = it661221_audio_ch_enable(ctx, true);
1365 if (ret) {
1366 dev_err(dev, "Failed to enable audio channel: %d\n", ret);
1367 goto out;
1368 }
1369
1370 ret = regmap_write_bits(ctx->regmap, IT66121_INT_MASK1_REG,
1371 IT66121_INT_MASK1_AUD_OVF,
1372 0);
1373 if (ret)
1374 goto out;
1375
1376 dev_dbg(dev, "HDMI audio enabled.\n");
1377out:
1378 mutex_unlock(&ctx->lock);
1379
1380 return ret;
1381}
1382
1383static int it66121_audio_startup(struct device *dev, void *data)
1384{
1385 int ret;
1386 struct it66121_ctx *ctx = dev_get_drvdata(dev);
1387
1388 mutex_lock(&ctx->lock);
1389 ret = it661221_audio_output_enable(ctx, true);
1390 if (ret)
1391 dev_err(dev, "Failed to enable audio output: %d\n", ret);
1392
1393 mutex_unlock(&ctx->lock);
1394
1395 return ret;
1396}
1397
1398static void it66121_audio_shutdown(struct device *dev, void *data)
1399{
1400 int ret;
1401 struct it66121_ctx *ctx = dev_get_drvdata(dev);
1402
1403 mutex_lock(&ctx->lock);
1404 ret = it661221_audio_output_enable(ctx, false);
1405 if (ret)
1406 dev_err(dev, "Failed to disable audio output: %d\n", ret);
1407
1408 mutex_unlock(&ctx->lock);
1409}
1410
1411static int it66121_audio_mute(struct device *dev, void *data,
1412 bool enable, int direction)
1413{
1414 int ret;
1415 struct it66121_ctx *ctx = dev_get_drvdata(dev);
1416
1417 dev_dbg(dev, "%s: enable=%s, direction=%d\n",
1418 __func__, enable ? "true" : "false", direction);
1419
1420 mutex_lock(&ctx->lock);
1421
1422 if (enable) {
1423 ret = regmap_write_bits(ctx->regmap, IT66121_AUD_SRCVALID_FLAT_REG,
1424 IT66121_AUD_FLAT_SRC0 | IT66121_AUD_FLAT_SRC1 |
1425 IT66121_AUD_FLAT_SRC2 | IT66121_AUD_FLAT_SRC3,
1426 IT66121_AUD_FLAT_SRC0 | IT66121_AUD_FLAT_SRC1 |
1427 IT66121_AUD_FLAT_SRC2 | IT66121_AUD_FLAT_SRC3);
1428 } else {
1429 ret = regmap_write_bits(ctx->regmap, IT66121_AUD_SRCVALID_FLAT_REG,
1430 IT66121_AUD_FLAT_SRC0 | IT66121_AUD_FLAT_SRC1 |
1431 IT66121_AUD_FLAT_SRC2 | IT66121_AUD_FLAT_SRC3,
1432 0);
1433 }
1434
1435 mutex_unlock(&ctx->lock);
1436
1437 return ret;
1438}
1439
1440static int it66121_audio_get_eld(struct device *dev, void *data,
1441 u8 *buf, size_t len)
1442{
1443 struct it66121_ctx *ctx = dev_get_drvdata(dev);
1444
1445 mutex_lock(&ctx->lock);
1446 if (!ctx->connector) {
1447 /* Pass en empty ELD if connector not available */
1448 dev_dbg(dev, "No connector present, passing empty EDID data");
1449 memset(buf, 0, len);
1450 } else {
1451 mutex_lock(&ctx->connector->eld_mutex);
1452 memcpy(buf, ctx->connector->eld,
1453 min(sizeof(ctx->connector->eld), len));
1454 mutex_unlock(&ctx->connector->eld_mutex);
1455 }
1456 mutex_unlock(&ctx->lock);
1457
1458 return 0;
1459}
1460
1461static const struct hdmi_codec_ops it66121_audio_codec_ops = {
1462 .hw_params = it66121_audio_hw_params,
1463 .audio_startup = it66121_audio_startup,
1464 .audio_shutdown = it66121_audio_shutdown,
1465 .mute_stream = it66121_audio_mute,
1466 .get_eld = it66121_audio_get_eld,
1467};
1468
1469static int it66121_audio_codec_init(struct it66121_ctx *ctx, struct device *dev)
1470{
1471 struct hdmi_codec_pdata codec_data = {
1472 .ops = &it66121_audio_codec_ops,
1473 .i2s = 1, /* Only i2s support for now */
1474 .spdif = 0,
1475 .max_i2s_channels = 8,
1476 .no_capture_mute = 1,
1477 };
1478
1479 if (!of_property_present(dev->of_node, "#sound-dai-cells")) {
1480 dev_info(dev, "No \"#sound-dai-cells\", no audio\n");
1481 return 0;
1482 }
1483
1484 ctx->audio.pdev = platform_device_register_data(dev,
1485 HDMI_CODEC_DRV_NAME,
1486 PLATFORM_DEVID_AUTO,
1487 &codec_data,
1488 sizeof(codec_data));
1489
1490 if (IS_ERR(ctx->audio.pdev)) {
1491 dev_err(dev, "Failed to initialize HDMI audio codec: %d\n",
1492 PTR_ERR_OR_ZERO(ctx->audio.pdev));
1493 }
1494
1495 return PTR_ERR_OR_ZERO(ctx->audio.pdev);
1496}
1497
1498static const char * const it66121_supplies[] = {
1499 "vcn33", "vcn18", "vrf12"
1500};
1501
1502static const struct it66121_chip_info it66xx_chip_info[] = {
1503 {.id = ID_IT6610, .vid = 0xca00, .pid = 0x0611 },
1504 {.id = ID_IT66121, .vid = 0x4954, .pid = 0x0612 },
1505 {.id = ID_IT66122, .vid = 0x4954, .pid = 0x0622 },
1506};
1507
1508static int it66121_probe(struct i2c_client *client)
1509{
1510 u32 revision_id, vendor_ids[2] = { 0 }, device_ids[2] = { 0 };
1511 struct device_node *ep;
1512 int ret, i;
1513 struct it66121_ctx *ctx;
1514 struct device *dev = &client->dev;
1515 const struct it66121_chip_info *chip_info;
1516
1517 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
1518 dev_err(dev, "I2C check functionality failed.\n");
1519 return -ENXIO;
1520 }
1521
1522 ctx = devm_drm_bridge_alloc(dev, struct it66121_ctx, bridge,
1523 &it66121_bridge_funcs);
1524 if (IS_ERR(ctx))
1525 return PTR_ERR(ctx);
1526
1527 ep = of_graph_get_endpoint_by_regs(dev->of_node, 0, 0);
1528 if (!ep)
1529 return -EINVAL;
1530
1531 ctx->dev = dev;
1532 ctx->client = client;
1533
1534 of_property_read_u32(ep, "bus-width", &ctx->bus_width);
1535 of_node_put(ep);
1536
1537 if (ctx->bus_width != 12 && ctx->bus_width != 24)
1538 return -EINVAL;
1539
1540 ep = of_graph_get_remote_node(dev->of_node, 1, -1);
1541 if (!ep) {
1542 dev_err(ctx->dev, "The endpoint is unconnected\n");
1543 return -EINVAL;
1544 }
1545
1546 ctx->next_bridge = of_drm_find_bridge(ep);
1547 of_node_put(ep);
1548 if (!ctx->next_bridge) {
1549 dev_dbg(ctx->dev, "Next bridge not found, deferring probe\n");
1550 return -EPROBE_DEFER;
1551 }
1552
1553 i2c_set_clientdata(client, ctx);
1554 mutex_init(&ctx->lock);
1555
1556 ret = devm_regulator_bulk_get_enable(dev, ARRAY_SIZE(it66121_supplies),
1557 it66121_supplies);
1558 if (ret) {
1559 dev_err(dev, "Failed to enable power supplies\n");
1560 return ret;
1561 }
1562
1563 it66121_hw_reset(ctx);
1564
1565 ctx->regmap = devm_regmap_init_i2c(client, &it66121_regmap_config);
1566 if (IS_ERR(ctx->regmap))
1567 return PTR_ERR(ctx->regmap);
1568
1569 regmap_read(ctx->regmap, IT66121_VENDOR_ID0_REG, &vendor_ids[0]);
1570 regmap_read(ctx->regmap, IT66121_VENDOR_ID1_REG, &vendor_ids[1]);
1571 regmap_read(ctx->regmap, IT66121_DEVICE_ID0_REG, &device_ids[0]);
1572 regmap_read(ctx->regmap, IT66121_DEVICE_ID1_REG, &device_ids[1]);
1573
1574 /* Revision is shared with DEVICE_ID1 */
1575 revision_id = FIELD_GET(IT66121_REVISION_MASK, device_ids[1]);
1576 device_ids[1] &= IT66121_DEVICE_ID1_MASK;
1577
1578 for (i = 0; i < ARRAY_SIZE(it66xx_chip_info); i++) {
1579 chip_info = &it66xx_chip_info[i];
1580 if ((vendor_ids[1] << 8 | vendor_ids[0]) == chip_info->vid &&
1581 (device_ids[1] << 8 | device_ids[0]) == chip_info->pid) {
1582 ctx->id = chip_info->id;
1583 break;
1584 }
1585 }
1586
1587 if (i == ARRAY_SIZE(it66xx_chip_info))
1588 return -ENODEV;
1589
1590 ctx->bridge.of_node = dev->of_node;
1591 ctx->bridge.type = DRM_MODE_CONNECTOR_HDMIA;
1592 ctx->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID;
1593 if (client->irq > 0) {
1594 ctx->bridge.ops |= DRM_BRIDGE_OP_HPD;
1595
1596 ret = devm_request_threaded_irq(dev, client->irq, NULL,
1597 it66121_irq_threaded_handler,
1598 IRQF_ONESHOT, dev_name(dev),
1599 ctx);
1600 if (ret < 0) {
1601 dev_err(dev, "Failed to request irq %d:%d\n", client->irq, ret);
1602 return ret;
1603 }
1604 }
1605
1606 it66121_audio_codec_init(ctx, dev);
1607
1608 drm_bridge_add(&ctx->bridge);
1609
1610 dev_info(ctx->dev, "IT66121 revision %d probed\n", revision_id);
1611
1612 return 0;
1613}
1614
1615static void it66121_remove(struct i2c_client *client)
1616{
1617 struct it66121_ctx *ctx = i2c_get_clientdata(client);
1618
1619 drm_bridge_remove(&ctx->bridge);
1620 mutex_destroy(&ctx->lock);
1621}
1622
1623static const struct of_device_id it66121_dt_match[] = {
1624 { .compatible = "ite,it6610" },
1625 { .compatible = "ite,it66121" },
1626 { .compatible = "ite,it66122" },
1627 { }
1628};
1629MODULE_DEVICE_TABLE(of, it66121_dt_match);
1630
1631static const struct i2c_device_id it66121_id[] = {
1632 { .name = "it6610" },
1633 { .name = "it66121" },
1634 { .name = "it66122" },
1635 { }
1636};
1637MODULE_DEVICE_TABLE(i2c, it66121_id);
1638
1639static struct i2c_driver it66121_driver = {
1640 .driver = {
1641 .name = "it66121",
1642 .of_match_table = it66121_dt_match,
1643 },
1644 .probe = it66121_probe,
1645 .remove = it66121_remove,
1646 .id_table = it66121_id,
1647};
1648
1649module_i2c_driver(it66121_driver);
1650
1651MODULE_AUTHOR("Phong LE");
1652MODULE_DESCRIPTION("IT66121 HDMI transmitter driver");
1653MODULE_LICENSE("GPL v2");