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1/*
2 * Analog Devices ADV7511 HDMI transmitter driver
3 *
4 * Copyright 2012 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2.
7 */
8
9#include <linux/device.h>
10#include <linux/gpio/consumer.h>
11#include <linux/module.h>
12#include <linux/of_device.h>
13#include <linux/slab.h>
14
15#include <drm/drmP.h>
16#include <drm/drm_atomic.h>
17#include <drm/drm_atomic_helper.h>
18#include <drm/drm_edid.h>
19
20#include "adv7511.h"
21
22/* ADI recommended values for proper operation. */
23static const struct reg_sequence adv7511_fixed_registers[] = {
24 { 0x98, 0x03 },
25 { 0x9a, 0xe0 },
26 { 0x9c, 0x30 },
27 { 0x9d, 0x61 },
28 { 0xa2, 0xa4 },
29 { 0xa3, 0xa4 },
30 { 0xe0, 0xd0 },
31 { 0xf9, 0x00 },
32 { 0x55, 0x02 },
33};
34
35/* -----------------------------------------------------------------------------
36 * Register access
37 */
38
39static const uint8_t adv7511_register_defaults[] = {
40 0x12, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 00 */
41 0x00, 0x00, 0x01, 0x0e, 0xbc, 0x18, 0x01, 0x13,
42 0x25, 0x37, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 10 */
43 0x46, 0x62, 0x04, 0xa8, 0x00, 0x00, 0x1c, 0x84,
44 0x1c, 0xbf, 0x04, 0xa8, 0x1e, 0x70, 0x02, 0x1e, /* 20 */
45 0x00, 0x00, 0x04, 0xa8, 0x08, 0x12, 0x1b, 0xac,
46 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 30 */
47 0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00, 0xb0,
48 0x00, 0x50, 0x90, 0x7e, 0x79, 0x70, 0x00, 0x00, /* 40 */
49 0x00, 0xa8, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00,
50 0x00, 0x00, 0x02, 0x0d, 0x00, 0x00, 0x00, 0x00, /* 50 */
51 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
52 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 60 */
53 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
54 0x01, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 70 */
55 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
56 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 80 */
57 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
58 0x00, 0x00, 0x00, 0x00, 0xc0, 0x00, 0x00, 0x00, /* 90 */
59 0x0b, 0x02, 0x00, 0x18, 0x5a, 0x60, 0x00, 0x00,
60 0x00, 0x00, 0x80, 0x80, 0x08, 0x04, 0x00, 0x00, /* a0 */
61 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x40, 0x14,
62 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* b0 */
63 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
64 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* c0 */
65 0x00, 0x03, 0x00, 0x00, 0x02, 0x00, 0x01, 0x04,
66 0x30, 0xff, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00, /* d0 */
67 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x01,
68 0x80, 0x75, 0x00, 0x00, 0x60, 0x00, 0x00, 0x00, /* e0 */
69 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
70 0x00, 0x00, 0x00, 0x00, 0x00, 0x75, 0x11, 0x00, /* f0 */
71 0x00, 0x7c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
72};
73
74static bool adv7511_register_volatile(struct device *dev, unsigned int reg)
75{
76 switch (reg) {
77 case ADV7511_REG_CHIP_REVISION:
78 case ADV7511_REG_SPDIF_FREQ:
79 case ADV7511_REG_CTS_AUTOMATIC1:
80 case ADV7511_REG_CTS_AUTOMATIC2:
81 case ADV7511_REG_VIC_DETECTED:
82 case ADV7511_REG_VIC_SEND:
83 case ADV7511_REG_AUX_VIC_DETECTED:
84 case ADV7511_REG_STATUS:
85 case ADV7511_REG_GC(1):
86 case ADV7511_REG_INT(0):
87 case ADV7511_REG_INT(1):
88 case ADV7511_REG_PLL_STATUS:
89 case ADV7511_REG_AN(0):
90 case ADV7511_REG_AN(1):
91 case ADV7511_REG_AN(2):
92 case ADV7511_REG_AN(3):
93 case ADV7511_REG_AN(4):
94 case ADV7511_REG_AN(5):
95 case ADV7511_REG_AN(6):
96 case ADV7511_REG_AN(7):
97 case ADV7511_REG_HDCP_STATUS:
98 case ADV7511_REG_BCAPS:
99 case ADV7511_REG_BKSV(0):
100 case ADV7511_REG_BKSV(1):
101 case ADV7511_REG_BKSV(2):
102 case ADV7511_REG_BKSV(3):
103 case ADV7511_REG_BKSV(4):
104 case ADV7511_REG_DDC_STATUS:
105 case ADV7511_REG_EDID_READ_CTRL:
106 case ADV7511_REG_BSTATUS(0):
107 case ADV7511_REG_BSTATUS(1):
108 case ADV7511_REG_CHIP_ID_HIGH:
109 case ADV7511_REG_CHIP_ID_LOW:
110 return true;
111 }
112
113 return false;
114}
115
116static const struct regmap_config adv7511_regmap_config = {
117 .reg_bits = 8,
118 .val_bits = 8,
119
120 .max_register = 0xff,
121 .cache_type = REGCACHE_RBTREE,
122 .reg_defaults_raw = adv7511_register_defaults,
123 .num_reg_defaults_raw = ARRAY_SIZE(adv7511_register_defaults),
124
125 .volatile_reg = adv7511_register_volatile,
126};
127
128/* -----------------------------------------------------------------------------
129 * Hardware configuration
130 */
131
132static void adv7511_set_colormap(struct adv7511 *adv7511, bool enable,
133 const uint16_t *coeff,
134 unsigned int scaling_factor)
135{
136 unsigned int i;
137
138 regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(1),
139 ADV7511_CSC_UPDATE_MODE, ADV7511_CSC_UPDATE_MODE);
140
141 if (enable) {
142 for (i = 0; i < 12; ++i) {
143 regmap_update_bits(adv7511->regmap,
144 ADV7511_REG_CSC_UPPER(i),
145 0x1f, coeff[i] >> 8);
146 regmap_write(adv7511->regmap,
147 ADV7511_REG_CSC_LOWER(i),
148 coeff[i] & 0xff);
149 }
150 }
151
152 if (enable)
153 regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(0),
154 0xe0, 0x80 | (scaling_factor << 5));
155 else
156 regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(0),
157 0x80, 0x00);
158
159 regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(1),
160 ADV7511_CSC_UPDATE_MODE, 0);
161}
162
163static int adv7511_packet_enable(struct adv7511 *adv7511, unsigned int packet)
164{
165 if (packet & 0xff)
166 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE0,
167 packet, 0xff);
168
169 if (packet & 0xff00) {
170 packet >>= 8;
171 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
172 packet, 0xff);
173 }
174
175 return 0;
176}
177
178static int adv7511_packet_disable(struct adv7511 *adv7511, unsigned int packet)
179{
180 if (packet & 0xff)
181 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE0,
182 packet, 0x00);
183
184 if (packet & 0xff00) {
185 packet >>= 8;
186 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
187 packet, 0x00);
188 }
189
190 return 0;
191}
192
193/* Coefficients for adv7511 color space conversion */
194static const uint16_t adv7511_csc_ycbcr_to_rgb[] = {
195 0x0734, 0x04ad, 0x0000, 0x1c1b,
196 0x1ddc, 0x04ad, 0x1f24, 0x0135,
197 0x0000, 0x04ad, 0x087c, 0x1b77,
198};
199
200static void adv7511_set_config_csc(struct adv7511 *adv7511,
201 struct drm_connector *connector,
202 bool rgb)
203{
204 struct adv7511_video_config config;
205 bool output_format_422, output_format_ycbcr;
206 unsigned int mode;
207 uint8_t infoframe[17];
208
209 if (adv7511->edid)
210 config.hdmi_mode = drm_detect_hdmi_monitor(adv7511->edid);
211 else
212 config.hdmi_mode = false;
213
214 hdmi_avi_infoframe_init(&config.avi_infoframe);
215
216 config.avi_infoframe.scan_mode = HDMI_SCAN_MODE_UNDERSCAN;
217
218 if (rgb) {
219 config.csc_enable = false;
220 config.avi_infoframe.colorspace = HDMI_COLORSPACE_RGB;
221 } else {
222 config.csc_scaling_factor = ADV7511_CSC_SCALING_4;
223 config.csc_coefficents = adv7511_csc_ycbcr_to_rgb;
224
225 if ((connector->display_info.color_formats &
226 DRM_COLOR_FORMAT_YCRCB422) &&
227 config.hdmi_mode) {
228 config.csc_enable = false;
229 config.avi_infoframe.colorspace =
230 HDMI_COLORSPACE_YUV422;
231 } else {
232 config.csc_enable = true;
233 config.avi_infoframe.colorspace = HDMI_COLORSPACE_RGB;
234 }
235 }
236
237 if (config.hdmi_mode) {
238 mode = ADV7511_HDMI_CFG_MODE_HDMI;
239
240 switch (config.avi_infoframe.colorspace) {
241 case HDMI_COLORSPACE_YUV444:
242 output_format_422 = false;
243 output_format_ycbcr = true;
244 break;
245 case HDMI_COLORSPACE_YUV422:
246 output_format_422 = true;
247 output_format_ycbcr = true;
248 break;
249 default:
250 output_format_422 = false;
251 output_format_ycbcr = false;
252 break;
253 }
254 } else {
255 mode = ADV7511_HDMI_CFG_MODE_DVI;
256 output_format_422 = false;
257 output_format_ycbcr = false;
258 }
259
260 adv7511_packet_disable(adv7511, ADV7511_PACKET_ENABLE_AVI_INFOFRAME);
261
262 adv7511_set_colormap(adv7511, config.csc_enable,
263 config.csc_coefficents,
264 config.csc_scaling_factor);
265
266 regmap_update_bits(adv7511->regmap, ADV7511_REG_VIDEO_INPUT_CFG1, 0x81,
267 (output_format_422 << 7) | output_format_ycbcr);
268
269 regmap_update_bits(adv7511->regmap, ADV7511_REG_HDCP_HDMI_CFG,
270 ADV7511_HDMI_CFG_MODE_MASK, mode);
271
272 hdmi_avi_infoframe_pack(&config.avi_infoframe, infoframe,
273 sizeof(infoframe));
274
275 /* The AVI infoframe id is not configurable */
276 regmap_bulk_write(adv7511->regmap, ADV7511_REG_AVI_INFOFRAME_VERSION,
277 infoframe + 1, sizeof(infoframe) - 1);
278
279 adv7511_packet_enable(adv7511, ADV7511_PACKET_ENABLE_AVI_INFOFRAME);
280}
281
282static void adv7511_set_link_config(struct adv7511 *adv7511,
283 const struct adv7511_link_config *config)
284{
285 /*
286 * The input style values documented in the datasheet don't match the
287 * hardware register field values :-(
288 */
289 static const unsigned int input_styles[4] = { 0, 2, 1, 3 };
290
291 unsigned int clock_delay;
292 unsigned int color_depth;
293 unsigned int input_id;
294
295 clock_delay = (config->clock_delay + 1200) / 400;
296 color_depth = config->input_color_depth == 8 ? 3
297 : (config->input_color_depth == 10 ? 1 : 2);
298
299 /* TODO Support input ID 6 */
300 if (config->input_colorspace != HDMI_COLORSPACE_YUV422)
301 input_id = config->input_clock == ADV7511_INPUT_CLOCK_DDR
302 ? 5 : 0;
303 else if (config->input_clock == ADV7511_INPUT_CLOCK_DDR)
304 input_id = config->embedded_sync ? 8 : 7;
305 else if (config->input_clock == ADV7511_INPUT_CLOCK_2X)
306 input_id = config->embedded_sync ? 4 : 3;
307 else
308 input_id = config->embedded_sync ? 2 : 1;
309
310 regmap_update_bits(adv7511->regmap, ADV7511_REG_I2C_FREQ_ID_CFG, 0xf,
311 input_id);
312 regmap_update_bits(adv7511->regmap, ADV7511_REG_VIDEO_INPUT_CFG1, 0x7e,
313 (color_depth << 4) |
314 (input_styles[config->input_style] << 2));
315 regmap_write(adv7511->regmap, ADV7511_REG_VIDEO_INPUT_CFG2,
316 config->input_justification << 3);
317 regmap_write(adv7511->regmap, ADV7511_REG_TIMING_GEN_SEQ,
318 config->sync_pulse << 2);
319
320 regmap_write(adv7511->regmap, 0xba, clock_delay << 5);
321
322 adv7511->embedded_sync = config->embedded_sync;
323 adv7511->hsync_polarity = config->hsync_polarity;
324 adv7511->vsync_polarity = config->vsync_polarity;
325 adv7511->rgb = config->input_colorspace == HDMI_COLORSPACE_RGB;
326}
327
328static void adv7511_power_on(struct adv7511 *adv7511)
329{
330 adv7511->current_edid_segment = -1;
331
332 regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
333 ADV7511_POWER_POWER_DOWN, 0);
334 if (adv7511->i2c_main->irq) {
335 /*
336 * Documentation says the INT_ENABLE registers are reset in
337 * POWER_DOWN mode. My 7511w preserved the bits, however.
338 * Still, let's be safe and stick to the documentation.
339 */
340 regmap_write(adv7511->regmap, ADV7511_REG_INT_ENABLE(0),
341 ADV7511_INT0_EDID_READY);
342 regmap_write(adv7511->regmap, ADV7511_REG_INT_ENABLE(1),
343 ADV7511_INT1_DDC_ERROR);
344 }
345
346 /*
347 * Per spec it is allowed to pulse the HPD signal to indicate that the
348 * EDID information has changed. Some monitors do this when they wakeup
349 * from standby or are enabled. When the HPD goes low the adv7511 is
350 * reset and the outputs are disabled which might cause the monitor to
351 * go to standby again. To avoid this we ignore the HPD pin for the
352 * first few seconds after enabling the output.
353 */
354 regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2,
355 ADV7511_REG_POWER2_HPD_SRC_MASK,
356 ADV7511_REG_POWER2_HPD_SRC_NONE);
357
358 /*
359 * Most of the registers are reset during power down or when HPD is low.
360 */
361 regcache_sync(adv7511->regmap);
362
363 if (adv7511->type == ADV7533)
364 adv7533_dsi_power_on(adv7511);
365
366 adv7511->powered = true;
367}
368
369static void adv7511_power_off(struct adv7511 *adv7511)
370{
371 /* TODO: setup additional power down modes */
372 regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
373 ADV7511_POWER_POWER_DOWN,
374 ADV7511_POWER_POWER_DOWN);
375 regcache_mark_dirty(adv7511->regmap);
376
377 if (adv7511->type == ADV7533)
378 adv7533_dsi_power_off(adv7511);
379
380 adv7511->powered = false;
381}
382
383/* -----------------------------------------------------------------------------
384 * Interrupt and hotplug detection
385 */
386
387static bool adv7511_hpd(struct adv7511 *adv7511)
388{
389 unsigned int irq0;
390 int ret;
391
392 ret = regmap_read(adv7511->regmap, ADV7511_REG_INT(0), &irq0);
393 if (ret < 0)
394 return false;
395
396 if (irq0 & ADV7511_INT0_HPD) {
397 regmap_write(adv7511->regmap, ADV7511_REG_INT(0),
398 ADV7511_INT0_HPD);
399 return true;
400 }
401
402 return false;
403}
404
405static int adv7511_irq_process(struct adv7511 *adv7511, bool process_hpd)
406{
407 unsigned int irq0, irq1;
408 int ret;
409
410 ret = regmap_read(adv7511->regmap, ADV7511_REG_INT(0), &irq0);
411 if (ret < 0)
412 return ret;
413
414 ret = regmap_read(adv7511->regmap, ADV7511_REG_INT(1), &irq1);
415 if (ret < 0)
416 return ret;
417
418 regmap_write(adv7511->regmap, ADV7511_REG_INT(0), irq0);
419 regmap_write(adv7511->regmap, ADV7511_REG_INT(1), irq1);
420
421 if (process_hpd && irq0 & ADV7511_INT0_HPD && adv7511->bridge.encoder)
422 drm_helper_hpd_irq_event(adv7511->connector.dev);
423
424 if (irq0 & ADV7511_INT0_EDID_READY || irq1 & ADV7511_INT1_DDC_ERROR) {
425 adv7511->edid_read = true;
426
427 if (adv7511->i2c_main->irq)
428 wake_up_all(&adv7511->wq);
429 }
430
431 return 0;
432}
433
434static irqreturn_t adv7511_irq_handler(int irq, void *devid)
435{
436 struct adv7511 *adv7511 = devid;
437 int ret;
438
439 ret = adv7511_irq_process(adv7511, true);
440 return ret < 0 ? IRQ_NONE : IRQ_HANDLED;
441}
442
443/* -----------------------------------------------------------------------------
444 * EDID retrieval
445 */
446
447static int adv7511_wait_for_edid(struct adv7511 *adv7511, int timeout)
448{
449 int ret;
450
451 if (adv7511->i2c_main->irq) {
452 ret = wait_event_interruptible_timeout(adv7511->wq,
453 adv7511->edid_read, msecs_to_jiffies(timeout));
454 } else {
455 for (; timeout > 0; timeout -= 25) {
456 ret = adv7511_irq_process(adv7511, false);
457 if (ret < 0)
458 break;
459
460 if (adv7511->edid_read)
461 break;
462
463 msleep(25);
464 }
465 }
466
467 return adv7511->edid_read ? 0 : -EIO;
468}
469
470static int adv7511_get_edid_block(void *data, u8 *buf, unsigned int block,
471 size_t len)
472{
473 struct adv7511 *adv7511 = data;
474 struct i2c_msg xfer[2];
475 uint8_t offset;
476 unsigned int i;
477 int ret;
478
479 if (len > 128)
480 return -EINVAL;
481
482 if (adv7511->current_edid_segment != block / 2) {
483 unsigned int status;
484
485 ret = regmap_read(adv7511->regmap, ADV7511_REG_DDC_STATUS,
486 &status);
487 if (ret < 0)
488 return ret;
489
490 if (status != 2) {
491 adv7511->edid_read = false;
492 regmap_write(adv7511->regmap, ADV7511_REG_EDID_SEGMENT,
493 block);
494 ret = adv7511_wait_for_edid(adv7511, 200);
495 if (ret < 0)
496 return ret;
497 }
498
499 /* Break this apart, hopefully more I2C controllers will
500 * support 64 byte transfers than 256 byte transfers
501 */
502
503 xfer[0].addr = adv7511->i2c_edid->addr;
504 xfer[0].flags = 0;
505 xfer[0].len = 1;
506 xfer[0].buf = &offset;
507 xfer[1].addr = adv7511->i2c_edid->addr;
508 xfer[1].flags = I2C_M_RD;
509 xfer[1].len = 64;
510 xfer[1].buf = adv7511->edid_buf;
511
512 offset = 0;
513
514 for (i = 0; i < 4; ++i) {
515 ret = i2c_transfer(adv7511->i2c_edid->adapter, xfer,
516 ARRAY_SIZE(xfer));
517 if (ret < 0)
518 return ret;
519 else if (ret != 2)
520 return -EIO;
521
522 xfer[1].buf += 64;
523 offset += 64;
524 }
525
526 adv7511->current_edid_segment = block / 2;
527 }
528
529 if (block % 2 == 0)
530 memcpy(buf, adv7511->edid_buf, len);
531 else
532 memcpy(buf, adv7511->edid_buf + 128, len);
533
534 return 0;
535}
536
537/* -----------------------------------------------------------------------------
538 * ADV75xx helpers
539 */
540
541static int adv7511_get_modes(struct adv7511 *adv7511,
542 struct drm_connector *connector)
543{
544 struct edid *edid;
545 unsigned int count;
546
547 /* Reading the EDID only works if the device is powered */
548 if (!adv7511->powered) {
549 regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
550 ADV7511_POWER_POWER_DOWN, 0);
551 if (adv7511->i2c_main->irq) {
552 regmap_write(adv7511->regmap, ADV7511_REG_INT_ENABLE(0),
553 ADV7511_INT0_EDID_READY);
554 regmap_write(adv7511->regmap, ADV7511_REG_INT_ENABLE(1),
555 ADV7511_INT1_DDC_ERROR);
556 }
557 adv7511->current_edid_segment = -1;
558 }
559
560 edid = drm_do_get_edid(connector, adv7511_get_edid_block, adv7511);
561
562 if (!adv7511->powered)
563 regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
564 ADV7511_POWER_POWER_DOWN,
565 ADV7511_POWER_POWER_DOWN);
566
567 kfree(adv7511->edid);
568 adv7511->edid = edid;
569 if (!edid)
570 return 0;
571
572 drm_mode_connector_update_edid_property(connector, edid);
573 count = drm_add_edid_modes(connector, edid);
574
575 adv7511_set_config_csc(adv7511, connector, adv7511->rgb);
576
577 return count;
578}
579
580static enum drm_connector_status
581adv7511_detect(struct adv7511 *adv7511, struct drm_connector *connector)
582{
583 enum drm_connector_status status;
584 unsigned int val;
585 bool hpd;
586 int ret;
587
588 ret = regmap_read(adv7511->regmap, ADV7511_REG_STATUS, &val);
589 if (ret < 0)
590 return connector_status_disconnected;
591
592 if (val & ADV7511_STATUS_HPD)
593 status = connector_status_connected;
594 else
595 status = connector_status_disconnected;
596
597 hpd = adv7511_hpd(adv7511);
598
599 /* The chip resets itself when the cable is disconnected, so in case
600 * there is a pending HPD interrupt and the cable is connected there was
601 * at least one transition from disconnected to connected and the chip
602 * has to be reinitialized. */
603 if (status == connector_status_connected && hpd && adv7511->powered) {
604 regcache_mark_dirty(adv7511->regmap);
605 adv7511_power_on(adv7511);
606 adv7511_get_modes(adv7511, connector);
607 if (adv7511->status == connector_status_connected)
608 status = connector_status_disconnected;
609 } else {
610 /* Renable HPD sensing */
611 regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2,
612 ADV7511_REG_POWER2_HPD_SRC_MASK,
613 ADV7511_REG_POWER2_HPD_SRC_BOTH);
614 }
615
616 adv7511->status = status;
617 return status;
618}
619
620static int adv7511_mode_valid(struct adv7511 *adv7511,
621 struct drm_display_mode *mode)
622{
623 if (mode->clock > 165000)
624 return MODE_CLOCK_HIGH;
625
626 return MODE_OK;
627}
628
629static void adv7511_mode_set(struct adv7511 *adv7511,
630 struct drm_display_mode *mode,
631 struct drm_display_mode *adj_mode)
632{
633 unsigned int low_refresh_rate;
634 unsigned int hsync_polarity = 0;
635 unsigned int vsync_polarity = 0;
636
637 if (adv7511->embedded_sync) {
638 unsigned int hsync_offset, hsync_len;
639 unsigned int vsync_offset, vsync_len;
640
641 hsync_offset = adj_mode->crtc_hsync_start -
642 adj_mode->crtc_hdisplay;
643 vsync_offset = adj_mode->crtc_vsync_start -
644 adj_mode->crtc_vdisplay;
645 hsync_len = adj_mode->crtc_hsync_end -
646 adj_mode->crtc_hsync_start;
647 vsync_len = adj_mode->crtc_vsync_end -
648 adj_mode->crtc_vsync_start;
649
650 /* The hardware vsync generator has a off-by-one bug */
651 vsync_offset += 1;
652
653 regmap_write(adv7511->regmap, ADV7511_REG_HSYNC_PLACEMENT_MSB,
654 ((hsync_offset >> 10) & 0x7) << 5);
655 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(0),
656 (hsync_offset >> 2) & 0xff);
657 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(1),
658 ((hsync_offset & 0x3) << 6) |
659 ((hsync_len >> 4) & 0x3f));
660 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(2),
661 ((hsync_len & 0xf) << 4) |
662 ((vsync_offset >> 6) & 0xf));
663 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(3),
664 ((vsync_offset & 0x3f) << 2) |
665 ((vsync_len >> 8) & 0x3));
666 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(4),
667 vsync_len & 0xff);
668
669 hsync_polarity = !(adj_mode->flags & DRM_MODE_FLAG_PHSYNC);
670 vsync_polarity = !(adj_mode->flags & DRM_MODE_FLAG_PVSYNC);
671 } else {
672 enum adv7511_sync_polarity mode_hsync_polarity;
673 enum adv7511_sync_polarity mode_vsync_polarity;
674
675 /**
676 * If the input signal is always low or always high we want to
677 * invert or let it passthrough depending on the polarity of the
678 * current mode.
679 **/
680 if (adj_mode->flags & DRM_MODE_FLAG_NHSYNC)
681 mode_hsync_polarity = ADV7511_SYNC_POLARITY_LOW;
682 else
683 mode_hsync_polarity = ADV7511_SYNC_POLARITY_HIGH;
684
685 if (adj_mode->flags & DRM_MODE_FLAG_NVSYNC)
686 mode_vsync_polarity = ADV7511_SYNC_POLARITY_LOW;
687 else
688 mode_vsync_polarity = ADV7511_SYNC_POLARITY_HIGH;
689
690 if (adv7511->hsync_polarity != mode_hsync_polarity &&
691 adv7511->hsync_polarity !=
692 ADV7511_SYNC_POLARITY_PASSTHROUGH)
693 hsync_polarity = 1;
694
695 if (adv7511->vsync_polarity != mode_vsync_polarity &&
696 adv7511->vsync_polarity !=
697 ADV7511_SYNC_POLARITY_PASSTHROUGH)
698 vsync_polarity = 1;
699 }
700
701 if (mode->vrefresh <= 24000)
702 low_refresh_rate = ADV7511_LOW_REFRESH_RATE_24HZ;
703 else if (mode->vrefresh <= 25000)
704 low_refresh_rate = ADV7511_LOW_REFRESH_RATE_25HZ;
705 else if (mode->vrefresh <= 30000)
706 low_refresh_rate = ADV7511_LOW_REFRESH_RATE_30HZ;
707 else
708 low_refresh_rate = ADV7511_LOW_REFRESH_RATE_NONE;
709
710 regmap_update_bits(adv7511->regmap, 0xfb,
711 0x6, low_refresh_rate << 1);
712 regmap_update_bits(adv7511->regmap, 0x17,
713 0x60, (vsync_polarity << 6) | (hsync_polarity << 5));
714
715 if (adv7511->type == ADV7533)
716 adv7533_mode_set(adv7511, adj_mode);
717
718 drm_mode_copy(&adv7511->curr_mode, adj_mode);
719
720 /*
721 * TODO Test first order 4:2:2 to 4:4:4 up conversion method, which is
722 * supposed to give better results.
723 */
724
725 adv7511->f_tmds = mode->clock;
726}
727
728/* Connector funcs */
729static struct adv7511 *connector_to_adv7511(struct drm_connector *connector)
730{
731 return container_of(connector, struct adv7511, connector);
732}
733
734static int adv7511_connector_get_modes(struct drm_connector *connector)
735{
736 struct adv7511 *adv = connector_to_adv7511(connector);
737
738 return adv7511_get_modes(adv, connector);
739}
740
741static enum drm_mode_status
742adv7511_connector_mode_valid(struct drm_connector *connector,
743 struct drm_display_mode *mode)
744{
745 struct adv7511 *adv = connector_to_adv7511(connector);
746
747 return adv7511_mode_valid(adv, mode);
748}
749
750static struct drm_connector_helper_funcs adv7511_connector_helper_funcs = {
751 .get_modes = adv7511_connector_get_modes,
752 .mode_valid = adv7511_connector_mode_valid,
753};
754
755static enum drm_connector_status
756adv7511_connector_detect(struct drm_connector *connector, bool force)
757{
758 struct adv7511 *adv = connector_to_adv7511(connector);
759
760 return adv7511_detect(adv, connector);
761}
762
763static struct drm_connector_funcs adv7511_connector_funcs = {
764 .dpms = drm_atomic_helper_connector_dpms,
765 .fill_modes = drm_helper_probe_single_connector_modes,
766 .detect = adv7511_connector_detect,
767 .destroy = drm_connector_cleanup,
768 .reset = drm_atomic_helper_connector_reset,
769 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
770 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
771};
772
773/* Bridge funcs */
774static struct adv7511 *bridge_to_adv7511(struct drm_bridge *bridge)
775{
776 return container_of(bridge, struct adv7511, bridge);
777}
778
779static void adv7511_bridge_enable(struct drm_bridge *bridge)
780{
781 struct adv7511 *adv = bridge_to_adv7511(bridge);
782
783 adv7511_power_on(adv);
784}
785
786static void adv7511_bridge_disable(struct drm_bridge *bridge)
787{
788 struct adv7511 *adv = bridge_to_adv7511(bridge);
789
790 adv7511_power_off(adv);
791}
792
793static void adv7511_bridge_mode_set(struct drm_bridge *bridge,
794 struct drm_display_mode *mode,
795 struct drm_display_mode *adj_mode)
796{
797 struct adv7511 *adv = bridge_to_adv7511(bridge);
798
799 adv7511_mode_set(adv, mode, adj_mode);
800}
801
802static int adv7511_bridge_attach(struct drm_bridge *bridge)
803{
804 struct adv7511 *adv = bridge_to_adv7511(bridge);
805 int ret;
806
807 if (!bridge->encoder) {
808 DRM_ERROR("Parent encoder object not found");
809 return -ENODEV;
810 }
811
812 adv->connector.polled = DRM_CONNECTOR_POLL_HPD;
813
814 ret = drm_connector_init(bridge->dev, &adv->connector,
815 &adv7511_connector_funcs,
816 DRM_MODE_CONNECTOR_HDMIA);
817 if (ret) {
818 DRM_ERROR("Failed to initialize connector with drm\n");
819 return ret;
820 }
821 drm_connector_helper_add(&adv->connector,
822 &adv7511_connector_helper_funcs);
823 drm_mode_connector_attach_encoder(&adv->connector, bridge->encoder);
824
825 if (adv->type == ADV7533)
826 ret = adv7533_attach_dsi(adv);
827
828 return ret;
829}
830
831static struct drm_bridge_funcs adv7511_bridge_funcs = {
832 .enable = adv7511_bridge_enable,
833 .disable = adv7511_bridge_disable,
834 .mode_set = adv7511_bridge_mode_set,
835 .attach = adv7511_bridge_attach,
836};
837
838/* -----------------------------------------------------------------------------
839 * Probe & remove
840 */
841
842static int adv7511_parse_dt(struct device_node *np,
843 struct adv7511_link_config *config)
844{
845 const char *str;
846 int ret;
847
848 of_property_read_u32(np, "adi,input-depth", &config->input_color_depth);
849 if (config->input_color_depth != 8 && config->input_color_depth != 10 &&
850 config->input_color_depth != 12)
851 return -EINVAL;
852
853 ret = of_property_read_string(np, "adi,input-colorspace", &str);
854 if (ret < 0)
855 return ret;
856
857 if (!strcmp(str, "rgb"))
858 config->input_colorspace = HDMI_COLORSPACE_RGB;
859 else if (!strcmp(str, "yuv422"))
860 config->input_colorspace = HDMI_COLORSPACE_YUV422;
861 else if (!strcmp(str, "yuv444"))
862 config->input_colorspace = HDMI_COLORSPACE_YUV444;
863 else
864 return -EINVAL;
865
866 ret = of_property_read_string(np, "adi,input-clock", &str);
867 if (ret < 0)
868 return ret;
869
870 if (!strcmp(str, "1x"))
871 config->input_clock = ADV7511_INPUT_CLOCK_1X;
872 else if (!strcmp(str, "2x"))
873 config->input_clock = ADV7511_INPUT_CLOCK_2X;
874 else if (!strcmp(str, "ddr"))
875 config->input_clock = ADV7511_INPUT_CLOCK_DDR;
876 else
877 return -EINVAL;
878
879 if (config->input_colorspace == HDMI_COLORSPACE_YUV422 ||
880 config->input_clock != ADV7511_INPUT_CLOCK_1X) {
881 ret = of_property_read_u32(np, "adi,input-style",
882 &config->input_style);
883 if (ret)
884 return ret;
885
886 if (config->input_style < 1 || config->input_style > 3)
887 return -EINVAL;
888
889 ret = of_property_read_string(np, "adi,input-justification",
890 &str);
891 if (ret < 0)
892 return ret;
893
894 if (!strcmp(str, "left"))
895 config->input_justification =
896 ADV7511_INPUT_JUSTIFICATION_LEFT;
897 else if (!strcmp(str, "evenly"))
898 config->input_justification =
899 ADV7511_INPUT_JUSTIFICATION_EVENLY;
900 else if (!strcmp(str, "right"))
901 config->input_justification =
902 ADV7511_INPUT_JUSTIFICATION_RIGHT;
903 else
904 return -EINVAL;
905
906 } else {
907 config->input_style = 1;
908 config->input_justification = ADV7511_INPUT_JUSTIFICATION_LEFT;
909 }
910
911 of_property_read_u32(np, "adi,clock-delay", &config->clock_delay);
912 if (config->clock_delay < -1200 || config->clock_delay > 1600)
913 return -EINVAL;
914
915 config->embedded_sync = of_property_read_bool(np, "adi,embedded-sync");
916
917 /* Hardcode the sync pulse configurations for now. */
918 config->sync_pulse = ADV7511_INPUT_SYNC_PULSE_NONE;
919 config->vsync_polarity = ADV7511_SYNC_POLARITY_PASSTHROUGH;
920 config->hsync_polarity = ADV7511_SYNC_POLARITY_PASSTHROUGH;
921
922 return 0;
923}
924
925static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
926{
927 struct adv7511_link_config link_config;
928 struct adv7511 *adv7511;
929 struct device *dev = &i2c->dev;
930 unsigned int main_i2c_addr = i2c->addr << 1;
931 unsigned int edid_i2c_addr = main_i2c_addr + 4;
932 unsigned int val;
933 int ret;
934
935 if (!dev->of_node)
936 return -EINVAL;
937
938 adv7511 = devm_kzalloc(dev, sizeof(*adv7511), GFP_KERNEL);
939 if (!adv7511)
940 return -ENOMEM;
941
942 adv7511->powered = false;
943 adv7511->status = connector_status_disconnected;
944
945 if (dev->of_node)
946 adv7511->type = (enum adv7511_type)of_device_get_match_data(dev);
947 else
948 adv7511->type = id->driver_data;
949
950 memset(&link_config, 0, sizeof(link_config));
951
952 if (adv7511->type == ADV7511)
953 ret = adv7511_parse_dt(dev->of_node, &link_config);
954 else
955 ret = adv7533_parse_dt(dev->of_node, adv7511);
956 if (ret)
957 return ret;
958
959 /*
960 * The power down GPIO is optional. If present, toggle it from active to
961 * inactive to wake up the encoder.
962 */
963 adv7511->gpio_pd = devm_gpiod_get_optional(dev, "pd", GPIOD_OUT_HIGH);
964 if (IS_ERR(adv7511->gpio_pd))
965 return PTR_ERR(adv7511->gpio_pd);
966
967 if (adv7511->gpio_pd) {
968 mdelay(5);
969 gpiod_set_value_cansleep(adv7511->gpio_pd, 0);
970 }
971
972 adv7511->regmap = devm_regmap_init_i2c(i2c, &adv7511_regmap_config);
973 if (IS_ERR(adv7511->regmap))
974 return PTR_ERR(adv7511->regmap);
975
976 ret = regmap_read(adv7511->regmap, ADV7511_REG_CHIP_REVISION, &val);
977 if (ret)
978 return ret;
979 dev_dbg(dev, "Rev. %d\n", val);
980
981 if (adv7511->type == ADV7511)
982 ret = regmap_register_patch(adv7511->regmap,
983 adv7511_fixed_registers,
984 ARRAY_SIZE(adv7511_fixed_registers));
985 else
986 ret = adv7533_patch_registers(adv7511);
987 if (ret)
988 return ret;
989
990 regmap_write(adv7511->regmap, ADV7511_REG_EDID_I2C_ADDR, edid_i2c_addr);
991 regmap_write(adv7511->regmap, ADV7511_REG_PACKET_I2C_ADDR,
992 main_i2c_addr - 0xa);
993 regmap_write(adv7511->regmap, ADV7511_REG_CEC_I2C_ADDR,
994 main_i2c_addr - 2);
995
996 adv7511_packet_disable(adv7511, 0xffff);
997
998 adv7511->i2c_main = i2c;
999 adv7511->i2c_edid = i2c_new_dummy(i2c->adapter, edid_i2c_addr >> 1);
1000 if (!adv7511->i2c_edid)
1001 return -ENOMEM;
1002
1003 if (adv7511->type == ADV7533) {
1004 ret = adv7533_init_cec(adv7511);
1005 if (ret)
1006 goto err_i2c_unregister_edid;
1007 }
1008
1009 if (i2c->irq) {
1010 init_waitqueue_head(&adv7511->wq);
1011
1012 ret = devm_request_threaded_irq(dev, i2c->irq, NULL,
1013 adv7511_irq_handler,
1014 IRQF_ONESHOT, dev_name(dev),
1015 adv7511);
1016 if (ret)
1017 goto err_unregister_cec;
1018 }
1019
1020 /* CEC is unused for now */
1021 regmap_write(adv7511->regmap, ADV7511_REG_CEC_CTRL,
1022 ADV7511_CEC_CTRL_POWER_DOWN);
1023
1024 adv7511_power_off(adv7511);
1025
1026 i2c_set_clientdata(i2c, adv7511);
1027
1028 if (adv7511->type == ADV7511)
1029 adv7511_set_link_config(adv7511, &link_config);
1030
1031 adv7511->bridge.funcs = &adv7511_bridge_funcs;
1032 adv7511->bridge.of_node = dev->of_node;
1033
1034 ret = drm_bridge_add(&adv7511->bridge);
1035 if (ret) {
1036 dev_err(dev, "failed to add adv7511 bridge\n");
1037 goto err_unregister_cec;
1038 }
1039
1040 adv7511_audio_init(dev, adv7511);
1041
1042 return 0;
1043
1044err_unregister_cec:
1045 adv7533_uninit_cec(adv7511);
1046err_i2c_unregister_edid:
1047 i2c_unregister_device(adv7511->i2c_edid);
1048
1049 return ret;
1050}
1051
1052static int adv7511_remove(struct i2c_client *i2c)
1053{
1054 struct adv7511 *adv7511 = i2c_get_clientdata(i2c);
1055
1056 if (adv7511->type == ADV7533) {
1057 adv7533_detach_dsi(adv7511);
1058 adv7533_uninit_cec(adv7511);
1059 }
1060
1061 drm_bridge_remove(&adv7511->bridge);
1062
1063 adv7511_audio_exit(adv7511);
1064
1065 i2c_unregister_device(adv7511->i2c_edid);
1066
1067 kfree(adv7511->edid);
1068
1069 return 0;
1070}
1071
1072static const struct i2c_device_id adv7511_i2c_ids[] = {
1073 { "adv7511", ADV7511 },
1074 { "adv7511w", ADV7511 },
1075 { "adv7513", ADV7511 },
1076#ifdef CONFIG_DRM_I2C_ADV7533
1077 { "adv7533", ADV7533 },
1078#endif
1079 { }
1080};
1081MODULE_DEVICE_TABLE(i2c, adv7511_i2c_ids);
1082
1083static const struct of_device_id adv7511_of_ids[] = {
1084 { .compatible = "adi,adv7511", .data = (void *)ADV7511 },
1085 { .compatible = "adi,adv7511w", .data = (void *)ADV7511 },
1086 { .compatible = "adi,adv7513", .data = (void *)ADV7511 },
1087#ifdef CONFIG_DRM_I2C_ADV7533
1088 { .compatible = "adi,adv7533", .data = (void *)ADV7533 },
1089#endif
1090 { }
1091};
1092MODULE_DEVICE_TABLE(of, adv7511_of_ids);
1093
1094static struct mipi_dsi_driver adv7533_dsi_driver = {
1095 .driver.name = "adv7533",
1096};
1097
1098static struct i2c_driver adv7511_driver = {
1099 .driver = {
1100 .name = "adv7511",
1101 .of_match_table = adv7511_of_ids,
1102 },
1103 .id_table = adv7511_i2c_ids,
1104 .probe = adv7511_probe,
1105 .remove = adv7511_remove,
1106};
1107
1108static int __init adv7511_init(void)
1109{
1110 if (IS_ENABLED(CONFIG_DRM_MIPI_DSI))
1111 mipi_dsi_driver_register(&adv7533_dsi_driver);
1112
1113 return i2c_add_driver(&adv7511_driver);
1114}
1115module_init(adv7511_init);
1116
1117static void __exit adv7511_exit(void)
1118{
1119 i2c_del_driver(&adv7511_driver);
1120
1121 if (IS_ENABLED(CONFIG_DRM_MIPI_DSI))
1122 mipi_dsi_driver_unregister(&adv7533_dsi_driver);
1123}
1124module_exit(adv7511_exit);
1125
1126MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
1127MODULE_DESCRIPTION("ADV7511 HDMI transmitter driver");
1128MODULE_LICENSE("GPL");