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Linux 4.2.1
[linux/fpc-iii.git] / drivers / gpu / drm / i2c / adv7511.c
blob2aaa3c88999e32c0f951312b48aedded13f837e0
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/i2c.h>
12 #include <linux/module.h>
13 #include <linux/regmap.h>
14 #include <linux/slab.h>
15
16 #include <drm/drmP.h>
17 #include <drm/drm_crtc_helper.h>
18 #include <drm/drm_edid.h>
19 #include <drm/drm_encoder_slave.h>
20
21 #include "adv7511.h"
22
23 struct adv7511 {
24 struct i2c_client *i2c_main;
25 struct i2c_client *i2c_edid;
26
27 struct regmap *regmap;
28 struct regmap *packet_memory_regmap;
29 enum drm_connector_status status;
30 bool powered;
31
32 unsigned int f_tmds;
33
34 unsigned int current_edid_segment;
35 uint8_t edid_buf[256];
36 bool edid_read;
37
38 wait_queue_head_t wq;
39 struct drm_encoder *encoder;
40
41 bool embedded_sync;
42 enum adv7511_sync_polarity vsync_polarity;
43 enum adv7511_sync_polarity hsync_polarity;
44 bool rgb;
45
46 struct edid *edid;
47
48 struct gpio_desc *gpio_pd;
49 };
50
51 static struct adv7511 *encoder_to_adv7511(struct drm_encoder *encoder)
52 {
53 return to_encoder_slave(encoder)->slave_priv;
54 }
55
56 /* ADI recommended values for proper operation. */
57 static const struct reg_default adv7511_fixed_registers[] = {
58 { 0x98, 0x03 },
59 { 0x9a, 0xe0 },
60 { 0x9c, 0x30 },
61 { 0x9d, 0x61 },
62 { 0xa2, 0xa4 },
63 { 0xa3, 0xa4 },
64 { 0xe0, 0xd0 },
65 { 0xf9, 0x00 },
66 { 0x55, 0x02 },
67 };
68
69 /* -----------------------------------------------------------------------------
70 * Register access
71 */
72
73 static const uint8_t adv7511_register_defaults[] = {
74 0x12, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 00 */
75 0x00, 0x00, 0x01, 0x0e, 0xbc, 0x18, 0x01, 0x13,
76 0x25, 0x37, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 10 */
77 0x46, 0x62, 0x04, 0xa8, 0x00, 0x00, 0x1c, 0x84,
78 0x1c, 0xbf, 0x04, 0xa8, 0x1e, 0x70, 0x02, 0x1e, /* 20 */
79 0x00, 0x00, 0x04, 0xa8, 0x08, 0x12, 0x1b, 0xac,
80 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 30 */
81 0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00, 0xb0,
82 0x00, 0x50, 0x90, 0x7e, 0x79, 0x70, 0x00, 0x00, /* 40 */
83 0x00, 0xa8, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00,
84 0x00, 0x00, 0x02, 0x0d, 0x00, 0x00, 0x00, 0x00, /* 50 */
85 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
86 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 60 */
87 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
88 0x01, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 70 */
89 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
90 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 80 */
91 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
92 0x00, 0x00, 0x00, 0x00, 0xc0, 0x00, 0x00, 0x00, /* 90 */
93 0x0b, 0x02, 0x00, 0x18, 0x5a, 0x60, 0x00, 0x00,
94 0x00, 0x00, 0x80, 0x80, 0x08, 0x04, 0x00, 0x00, /* a0 */
95 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x40, 0x14,
96 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* b0 */
97 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
98 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* c0 */
99 0x00, 0x03, 0x00, 0x00, 0x02, 0x00, 0x01, 0x04,
100 0x30, 0xff, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00, /* d0 */
101 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x01,
102 0x80, 0x75, 0x00, 0x00, 0x60, 0x00, 0x00, 0x00, /* e0 */
103 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
104 0x00, 0x00, 0x00, 0x00, 0x00, 0x75, 0x11, 0x00, /* f0 */
105 0x00, 0x7c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
106 };
107
108 static bool adv7511_register_volatile(struct device *dev, unsigned int reg)
109 {
110 switch (reg) {
111 case ADV7511_REG_CHIP_REVISION:
112 case ADV7511_REG_SPDIF_FREQ:
113 case ADV7511_REG_CTS_AUTOMATIC1:
114 case ADV7511_REG_CTS_AUTOMATIC2:
115 case ADV7511_REG_VIC_DETECTED:
116 case ADV7511_REG_VIC_SEND:
117 case ADV7511_REG_AUX_VIC_DETECTED:
118 case ADV7511_REG_STATUS:
119 case ADV7511_REG_GC(1):
120 case ADV7511_REG_INT(0):
121 case ADV7511_REG_INT(1):
122 case ADV7511_REG_PLL_STATUS:
123 case ADV7511_REG_AN(0):
124 case ADV7511_REG_AN(1):
125 case ADV7511_REG_AN(2):
126 case ADV7511_REG_AN(3):
127 case ADV7511_REG_AN(4):
128 case ADV7511_REG_AN(5):
129 case ADV7511_REG_AN(6):
130 case ADV7511_REG_AN(7):
131 case ADV7511_REG_HDCP_STATUS:
132 case ADV7511_REG_BCAPS:
133 case ADV7511_REG_BKSV(0):
134 case ADV7511_REG_BKSV(1):
135 case ADV7511_REG_BKSV(2):
136 case ADV7511_REG_BKSV(3):
137 case ADV7511_REG_BKSV(4):
138 case ADV7511_REG_DDC_STATUS:
139 case ADV7511_REG_BSTATUS(0):
140 case ADV7511_REG_BSTATUS(1):
141 case ADV7511_REG_CHIP_ID_HIGH:
142 case ADV7511_REG_CHIP_ID_LOW:
143 return true;
144 }
145
146 return false;
147 }
148
149 static const struct regmap_config adv7511_regmap_config = {
150 .reg_bits = 8,
151 .val_bits = 8,
152
153 .max_register = 0xff,
154 .cache_type = REGCACHE_RBTREE,
155 .reg_defaults_raw = adv7511_register_defaults,
156 .num_reg_defaults_raw = ARRAY_SIZE(adv7511_register_defaults),
157
158 .volatile_reg = adv7511_register_volatile,
159 };
160
161 /* -----------------------------------------------------------------------------
162 * Hardware configuration
163 */
164
165 static void adv7511_set_colormap(struct adv7511 *adv7511, bool enable,
166 const uint16_t *coeff,
167 unsigned int scaling_factor)
168 {
169 unsigned int i;
170
171 regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(1),
172 ADV7511_CSC_UPDATE_MODE, ADV7511_CSC_UPDATE_MODE);
173
174 if (enable) {
175 for (i = 0; i < 12; ++i) {
176 regmap_update_bits(adv7511->regmap,
177 ADV7511_REG_CSC_UPPER(i),
178 0x1f, coeff[i] >> 8);
179 regmap_write(adv7511->regmap,
180 ADV7511_REG_CSC_LOWER(i),
181 coeff[i] & 0xff);
182 }
183 }
184
185 if (enable)
186 regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(0),
187 0xe0, 0x80 | (scaling_factor << 5));
188 else
189 regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(0),
190 0x80, 0x00);
191
192 regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(1),
193 ADV7511_CSC_UPDATE_MODE, 0);
194 }
195
196 static int adv7511_packet_enable(struct adv7511 *adv7511, unsigned int packet)
197 {
198 if (packet & 0xff)
199 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE0,
200 packet, 0xff);
201
202 if (packet & 0xff00) {
203 packet >>= 8;
204 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
205 packet, 0xff);
206 }
207
208 return 0;
209 }
210
211 static int adv7511_packet_disable(struct adv7511 *adv7511, unsigned int packet)
212 {
213 if (packet & 0xff)
214 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE0,
215 packet, 0x00);
216
217 if (packet & 0xff00) {
218 packet >>= 8;
219 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
220 packet, 0x00);
221 }
222
223 return 0;
224 }
225
226 /* Coefficients for adv7511 color space conversion */
227 static const uint16_t adv7511_csc_ycbcr_to_rgb[] = {
228 0x0734, 0x04ad, 0x0000, 0x1c1b,
229 0x1ddc, 0x04ad, 0x1f24, 0x0135,
230 0x0000, 0x04ad, 0x087c, 0x1b77,
231 };
232
233 static void adv7511_set_config_csc(struct adv7511 *adv7511,
234 struct drm_connector *connector,
235 bool rgb)
236 {
237 struct adv7511_video_config config;
238 bool output_format_422, output_format_ycbcr;
239 unsigned int mode;
240 uint8_t infoframe[17];
241
242 if (adv7511->edid)
243 config.hdmi_mode = drm_detect_hdmi_monitor(adv7511->edid);
244 else
245 config.hdmi_mode = false;
246
247 hdmi_avi_infoframe_init(&config.avi_infoframe);
248
249 config.avi_infoframe.scan_mode = HDMI_SCAN_MODE_UNDERSCAN;
250
251 if (rgb) {
252 config.csc_enable = false;
253 config.avi_infoframe.colorspace = HDMI_COLORSPACE_RGB;
254 } else {
255 config.csc_scaling_factor = ADV7511_CSC_SCALING_4;
256 config.csc_coefficents = adv7511_csc_ycbcr_to_rgb;
257
258 if ((connector->display_info.color_formats &
259 DRM_COLOR_FORMAT_YCRCB422) &&
260 config.hdmi_mode) {
261 config.csc_enable = false;
262 config.avi_infoframe.colorspace =
263 HDMI_COLORSPACE_YUV422;
264 } else {
265 config.csc_enable = true;
266 config.avi_infoframe.colorspace = HDMI_COLORSPACE_RGB;
267 }
268 }
269
270 if (config.hdmi_mode) {
271 mode = ADV7511_HDMI_CFG_MODE_HDMI;
272
273 switch (config.avi_infoframe.colorspace) {
274 case HDMI_COLORSPACE_YUV444:
275 output_format_422 = false;
276 output_format_ycbcr = true;
277 break;
278 case HDMI_COLORSPACE_YUV422:
279 output_format_422 = true;
280 output_format_ycbcr = true;
281 break;
282 default:
283 output_format_422 = false;
284 output_format_ycbcr = false;
285 break;
286 }
287 } else {
288 mode = ADV7511_HDMI_CFG_MODE_DVI;
289 output_format_422 = false;
290 output_format_ycbcr = false;
291 }
292
293 adv7511_packet_disable(adv7511, ADV7511_PACKET_ENABLE_AVI_INFOFRAME);
294
295 adv7511_set_colormap(adv7511, config.csc_enable,
296 config.csc_coefficents,
297 config.csc_scaling_factor);
298
299 regmap_update_bits(adv7511->regmap, ADV7511_REG_VIDEO_INPUT_CFG1, 0x81,
300 (output_format_422 << 7) | output_format_ycbcr);
301
302 regmap_update_bits(adv7511->regmap, ADV7511_REG_HDCP_HDMI_CFG,
303 ADV7511_HDMI_CFG_MODE_MASK, mode);
304
305 hdmi_avi_infoframe_pack(&config.avi_infoframe, infoframe,
306 sizeof(infoframe));
307
308 /* The AVI infoframe id is not configurable */
309 regmap_bulk_write(adv7511->regmap, ADV7511_REG_AVI_INFOFRAME_VERSION,
310 infoframe + 1, sizeof(infoframe) - 1);
311
312 adv7511_packet_enable(adv7511, ADV7511_PACKET_ENABLE_AVI_INFOFRAME);
313 }
314
315 static void adv7511_set_link_config(struct adv7511 *adv7511,
316 const struct adv7511_link_config *config)
317 {
318 /*
319 * The input style values documented in the datasheet don't match the
320 * hardware register field values :-(
321 */
322 static const unsigned int input_styles[4] = { 0, 2, 1, 3 };
323
324 unsigned int clock_delay;
325 unsigned int color_depth;
326 unsigned int input_id;
327
328 clock_delay = (config->clock_delay + 1200) / 400;
329 color_depth = config->input_color_depth == 8 ? 3
330 : (config->input_color_depth == 10 ? 1 : 2);
331
332 /* TODO Support input ID 6 */
333 if (config->input_colorspace != HDMI_COLORSPACE_YUV422)
334 input_id = config->input_clock == ADV7511_INPUT_CLOCK_DDR
335 ? 5 : 0;
336 else if (config->input_clock == ADV7511_INPUT_CLOCK_DDR)
337 input_id = config->embedded_sync ? 8 : 7;
338 else if (config->input_clock == ADV7511_INPUT_CLOCK_2X)
339 input_id = config->embedded_sync ? 4 : 3;
340 else
341 input_id = config->embedded_sync ? 2 : 1;
342
343 regmap_update_bits(adv7511->regmap, ADV7511_REG_I2C_FREQ_ID_CFG, 0xf,
344 input_id);
345 regmap_update_bits(adv7511->regmap, ADV7511_REG_VIDEO_INPUT_CFG1, 0x7e,
346 (color_depth << 4) |
347 (input_styles[config->input_style] << 2));
348 regmap_write(adv7511->regmap, ADV7511_REG_VIDEO_INPUT_CFG2,
349 config->input_justification << 3);
350 regmap_write(adv7511->regmap, ADV7511_REG_TIMING_GEN_SEQ,
351 config->sync_pulse << 2);
352
353 regmap_write(adv7511->regmap, 0xba, clock_delay << 5);
354
355 adv7511->embedded_sync = config->embedded_sync;
356 adv7511->hsync_polarity = config->hsync_polarity;
357 adv7511->vsync_polarity = config->vsync_polarity;
358 adv7511->rgb = config->input_colorspace == HDMI_COLORSPACE_RGB;
359 }
360
361 static void adv7511_power_on(struct adv7511 *adv7511)
362 {
363 adv7511->current_edid_segment = -1;
364
365 regmap_write(adv7511->regmap, ADV7511_REG_INT(0),
366 ADV7511_INT0_EDID_READY);
367 regmap_write(adv7511->regmap, ADV7511_REG_INT(1),
368 ADV7511_INT1_DDC_ERROR);
369 regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
370 ADV7511_POWER_POWER_DOWN, 0);
371
372 /*
373 * Per spec it is allowed to pulse the HDP signal to indicate that the
374 * EDID information has changed. Some monitors do this when they wakeup
375 * from standby or are enabled. When the HDP goes low the adv7511 is
376 * reset and the outputs are disabled which might cause the monitor to
377 * go to standby again. To avoid this we ignore the HDP pin for the
378 * first few seconds after enabling the output.
379 */
380 regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2,
381 ADV7511_REG_POWER2_HDP_SRC_MASK,
382 ADV7511_REG_POWER2_HDP_SRC_NONE);
383
384 /*
385 * Most of the registers are reset during power down or when HPD is low.
386 */
387 regcache_sync(adv7511->regmap);
388
389 adv7511->powered = true;
390 }
391
392 static void adv7511_power_off(struct adv7511 *adv7511)
393 {
394 /* TODO: setup additional power down modes */
395 regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
396 ADV7511_POWER_POWER_DOWN,
397 ADV7511_POWER_POWER_DOWN);
398 regcache_mark_dirty(adv7511->regmap);
399
400 adv7511->powered = false;
401 }
402
403 /* -----------------------------------------------------------------------------
404 * Interrupt and hotplug detection
405 */
406
407 static bool adv7511_hpd(struct adv7511 *adv7511)
408 {
409 unsigned int irq0;
410 int ret;
411
412 ret = regmap_read(adv7511->regmap, ADV7511_REG_INT(0), &irq0);
413 if (ret < 0)
414 return false;
415
416 if (irq0 & ADV7511_INT0_HDP) {
417 regmap_write(adv7511->regmap, ADV7511_REG_INT(0),
418 ADV7511_INT0_HDP);
419 return true;
420 }
421
422 return false;
423 }
424
425 static int adv7511_irq_process(struct adv7511 *adv7511)
426 {
427 unsigned int irq0, irq1;
428 int ret;
429
430 ret = regmap_read(adv7511->regmap, ADV7511_REG_INT(0), &irq0);
431 if (ret < 0)
432 return ret;
433
434 ret = regmap_read(adv7511->regmap, ADV7511_REG_INT(1), &irq1);
435 if (ret < 0)
436 return ret;
437
438 regmap_write(adv7511->regmap, ADV7511_REG_INT(0), irq0);
439 regmap_write(adv7511->regmap, ADV7511_REG_INT(1), irq1);
440
441 if (irq0 & ADV7511_INT0_HDP && adv7511->encoder)
442 drm_helper_hpd_irq_event(adv7511->encoder->dev);
443
444 if (irq0 & ADV7511_INT0_EDID_READY || irq1 & ADV7511_INT1_DDC_ERROR) {
445 adv7511->edid_read = true;
446
447 if (adv7511->i2c_main->irq)
448 wake_up_all(&adv7511->wq);
449 }
450
451 return 0;
452 }
453
454 static irqreturn_t adv7511_irq_handler(int irq, void *devid)
455 {
456 struct adv7511 *adv7511 = devid;
457 int ret;
458
459 ret = adv7511_irq_process(adv7511);
460 return ret < 0 ? IRQ_NONE : IRQ_HANDLED;
461 }
462
463 /* -----------------------------------------------------------------------------
464 * EDID retrieval
465 */
466
467 static int adv7511_wait_for_edid(struct adv7511 *adv7511, int timeout)
468 {
469 int ret;
470
471 if (adv7511->i2c_main->irq) {
472 ret = wait_event_interruptible_timeout(adv7511->wq,
473 adv7511->edid_read, msecs_to_jiffies(timeout));
474 } else {
475 for (; timeout > 0; timeout -= 25) {
476 ret = adv7511_irq_process(adv7511);
477 if (ret < 0)
478 break;
479
480 if (adv7511->edid_read)
481 break;
482
483 msleep(25);
484 }
485 }
486
487 return adv7511->edid_read ? 0 : -EIO;
488 }
489
490 static int adv7511_get_edid_block(void *data, u8 *buf, unsigned int block,
491 size_t len)
492 {
493 struct adv7511 *adv7511 = data;
494 struct i2c_msg xfer[2];
495 uint8_t offset;
496 unsigned int i;
497 int ret;
498
499 if (len > 128)
500 return -EINVAL;
501
502 if (adv7511->current_edid_segment != block / 2) {
503 unsigned int status;
504
505 ret = regmap_read(adv7511->regmap, ADV7511_REG_DDC_STATUS,
506 &status);
507 if (ret < 0)
508 return ret;
509
510 if (status != 2) {
511 adv7511->edid_read = false;
512 regmap_write(adv7511->regmap, ADV7511_REG_EDID_SEGMENT,
513 block);
514 ret = adv7511_wait_for_edid(adv7511, 200);
515 if (ret < 0)
516 return ret;
517 }
518
519 /* Break this apart, hopefully more I2C controllers will
520 * support 64 byte transfers than 256 byte transfers
521 */
522
523 xfer[0].addr = adv7511->i2c_edid->addr;
524 xfer[0].flags = 0;
525 xfer[0].len = 1;
526 xfer[0].buf = &offset;
527 xfer[1].addr = adv7511->i2c_edid->addr;
528 xfer[1].flags = I2C_M_RD;
529 xfer[1].len = 64;
530 xfer[1].buf = adv7511->edid_buf;
531
532 offset = 0;
533
534 for (i = 0; i < 4; ++i) {
535 ret = i2c_transfer(adv7511->i2c_edid->adapter, xfer,
536 ARRAY_SIZE(xfer));
537 if (ret < 0)
538 return ret;
539 else if (ret != 2)
540 return -EIO;
541
542 xfer[1].buf += 64;
543 offset += 64;
544 }
545
546 adv7511->current_edid_segment = block / 2;
547 }
548
549 if (block % 2 == 0)
550 memcpy(buf, adv7511->edid_buf, len);
551 else
552 memcpy(buf, adv7511->edid_buf + 128, len);
553
554 return 0;
555 }
556
557 /* -----------------------------------------------------------------------------
558 * Encoder operations
559 */
560
561 static int adv7511_get_modes(struct drm_encoder *encoder,
562 struct drm_connector *connector)
563 {
564 struct adv7511 *adv7511 = encoder_to_adv7511(encoder);
565 struct edid *edid;
566 unsigned int count;
567
568 /* Reading the EDID only works if the device is powered */
569 if (!adv7511->powered) {
570 regmap_write(adv7511->regmap, ADV7511_REG_INT(0),
571 ADV7511_INT0_EDID_READY);
572 regmap_write(adv7511->regmap, ADV7511_REG_INT(1),
573 ADV7511_INT1_DDC_ERROR);
574 regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
575 ADV7511_POWER_POWER_DOWN, 0);
576 adv7511->current_edid_segment = -1;
577 }
578
579 edid = drm_do_get_edid(connector, adv7511_get_edid_block, adv7511);
580
581 if (!adv7511->powered)
582 regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
583 ADV7511_POWER_POWER_DOWN,
584 ADV7511_POWER_POWER_DOWN);
585
586 kfree(adv7511->edid);
587 adv7511->edid = edid;
588 if (!edid)
589 return 0;
590
591 drm_mode_connector_update_edid_property(connector, edid);
592 count = drm_add_edid_modes(connector, edid);
593
594 adv7511_set_config_csc(adv7511, connector, adv7511->rgb);
595
596 return count;
597 }
598
599 static void adv7511_encoder_dpms(struct drm_encoder *encoder, int mode)
600 {
601 struct adv7511 *adv7511 = encoder_to_adv7511(encoder);
602
603 if (mode == DRM_MODE_DPMS_ON)
604 adv7511_power_on(adv7511);
605 else
606 adv7511_power_off(adv7511);
607 }
608
609 static enum drm_connector_status
610 adv7511_encoder_detect(struct drm_encoder *encoder,
611 struct drm_connector *connector)
612 {
613 struct adv7511 *adv7511 = encoder_to_adv7511(encoder);
614 enum drm_connector_status status;
615 unsigned int val;
616 bool hpd;
617 int ret;
618
619 ret = regmap_read(adv7511->regmap, ADV7511_REG_STATUS, &val);
620 if (ret < 0)
621 return connector_status_disconnected;
622
623 if (val & ADV7511_STATUS_HPD)
624 status = connector_status_connected;
625 else
626 status = connector_status_disconnected;
627
628 hpd = adv7511_hpd(adv7511);
629
630 /* The chip resets itself when the cable is disconnected, so in case
631 * there is a pending HPD interrupt and the cable is connected there was
632 * at least one transition from disconnected to connected and the chip
633 * has to be reinitialized. */
634 if (status == connector_status_connected && hpd && adv7511->powered) {
635 regcache_mark_dirty(adv7511->regmap);
636 adv7511_power_on(adv7511);
637 adv7511_get_modes(encoder, connector);
638 if (adv7511->status == connector_status_connected)
639 status = connector_status_disconnected;
640 } else {
641 /* Renable HDP sensing */
642 regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2,
643 ADV7511_REG_POWER2_HDP_SRC_MASK,
644 ADV7511_REG_POWER2_HDP_SRC_BOTH);
645 }
646
647 adv7511->status = status;
648 return status;
649 }
650
651 static int adv7511_encoder_mode_valid(struct drm_encoder *encoder,
652 struct drm_display_mode *mode)
653 {
654 if (mode->clock > 165000)
655 return MODE_CLOCK_HIGH;
656
657 return MODE_OK;
658 }
659
660 static void adv7511_encoder_mode_set(struct drm_encoder *encoder,
661 struct drm_display_mode *mode,
662 struct drm_display_mode *adj_mode)
663 {
664 struct adv7511 *adv7511 = encoder_to_adv7511(encoder);
665 unsigned int low_refresh_rate;
666 unsigned int hsync_polarity = 0;
667 unsigned int vsync_polarity = 0;
668
669 if (adv7511->embedded_sync) {
670 unsigned int hsync_offset, hsync_len;
671 unsigned int vsync_offset, vsync_len;
672
673 hsync_offset = adj_mode->crtc_hsync_start -
674 adj_mode->crtc_hdisplay;
675 vsync_offset = adj_mode->crtc_vsync_start -
676 adj_mode->crtc_vdisplay;
677 hsync_len = adj_mode->crtc_hsync_end -
678 adj_mode->crtc_hsync_start;
679 vsync_len = adj_mode->crtc_vsync_end -
680 adj_mode->crtc_vsync_start;
681
682 /* The hardware vsync generator has a off-by-one bug */
683 vsync_offset += 1;
684
685 regmap_write(adv7511->regmap, ADV7511_REG_HSYNC_PLACEMENT_MSB,
686 ((hsync_offset >> 10) & 0x7) << 5);
687 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(0),
688 (hsync_offset >> 2) & 0xff);
689 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(1),
690 ((hsync_offset & 0x3) << 6) |
691 ((hsync_len >> 4) & 0x3f));
692 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(2),
693 ((hsync_len & 0xf) << 4) |
694 ((vsync_offset >> 6) & 0xf));
695 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(3),
696 ((vsync_offset & 0x3f) << 2) |
697 ((vsync_len >> 8) & 0x3));
698 regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(4),
699 vsync_len & 0xff);
700
701 hsync_polarity = !(adj_mode->flags & DRM_MODE_FLAG_PHSYNC);
702 vsync_polarity = !(adj_mode->flags & DRM_MODE_FLAG_PVSYNC);
703 } else {
704 enum adv7511_sync_polarity mode_hsync_polarity;
705 enum adv7511_sync_polarity mode_vsync_polarity;
706
707 /**
708 * If the input signal is always low or always high we want to
709 * invert or let it passthrough depending on the polarity of the
710 * current mode.
711 **/
712 if (adj_mode->flags & DRM_MODE_FLAG_NHSYNC)
713 mode_hsync_polarity = ADV7511_SYNC_POLARITY_LOW;
714 else
715 mode_hsync_polarity = ADV7511_SYNC_POLARITY_HIGH;
716
717 if (adj_mode->flags & DRM_MODE_FLAG_NVSYNC)
718 mode_vsync_polarity = ADV7511_SYNC_POLARITY_LOW;
719 else
720 mode_vsync_polarity = ADV7511_SYNC_POLARITY_HIGH;
721
722 if (adv7511->hsync_polarity != mode_hsync_polarity &&
723 adv7511->hsync_polarity !=
724 ADV7511_SYNC_POLARITY_PASSTHROUGH)
725 hsync_polarity = 1;
726
727 if (adv7511->vsync_polarity != mode_vsync_polarity &&
728 adv7511->vsync_polarity !=
729 ADV7511_SYNC_POLARITY_PASSTHROUGH)
730 vsync_polarity = 1;
731 }
732
733 if (mode->vrefresh <= 24000)
734 low_refresh_rate = ADV7511_LOW_REFRESH_RATE_24HZ;
735 else if (mode->vrefresh <= 25000)
736 low_refresh_rate = ADV7511_LOW_REFRESH_RATE_25HZ;
737 else if (mode->vrefresh <= 30000)
738 low_refresh_rate = ADV7511_LOW_REFRESH_RATE_30HZ;
739 else
740 low_refresh_rate = ADV7511_LOW_REFRESH_RATE_NONE;
741
742 regmap_update_bits(adv7511->regmap, 0xfb,
743 0x6, low_refresh_rate << 1);
744 regmap_update_bits(adv7511->regmap, 0x17,
745 0x60, (vsync_polarity << 6) | (hsync_polarity << 5));
746
747 /*
748 * TODO Test first order 4:2:2 to 4:4:4 up conversion method, which is
749 * supposed to give better results.
750 */
751
752 adv7511->f_tmds = mode->clock;
753 }
754
755 static struct drm_encoder_slave_funcs adv7511_encoder_funcs = {
756 .dpms = adv7511_encoder_dpms,
757 .mode_valid = adv7511_encoder_mode_valid,
758 .mode_set = adv7511_encoder_mode_set,
759 .detect = adv7511_encoder_detect,
760 .get_modes = adv7511_get_modes,
761 };
762
763 /* -----------------------------------------------------------------------------
764 * Probe & remove
765 */
766
767 static int adv7511_parse_dt(struct device_node *np,
768 struct adv7511_link_config *config)
769 {
770 const char *str;
771 int ret;
772
773 memset(config, 0, sizeof(*config));
774
775 of_property_read_u32(np, "adi,input-depth", &config->input_color_depth);
776 if (config->input_color_depth != 8 && config->input_color_depth != 10 &&
777 config->input_color_depth != 12)
778 return -EINVAL;
779
780 ret = of_property_read_string(np, "adi,input-colorspace", &str);
781 if (ret < 0)
782 return ret;
783
784 if (!strcmp(str, "rgb"))
785 config->input_colorspace = HDMI_COLORSPACE_RGB;
786 else if (!strcmp(str, "yuv422"))
787 config->input_colorspace = HDMI_COLORSPACE_YUV422;
788 else if (!strcmp(str, "yuv444"))
789 config->input_colorspace = HDMI_COLORSPACE_YUV444;
790 else
791 return -EINVAL;
792
793 ret = of_property_read_string(np, "adi,input-clock", &str);
794 if (ret < 0)
795 return ret;
796
797 if (!strcmp(str, "1x"))
798 config->input_clock = ADV7511_INPUT_CLOCK_1X;
799 else if (!strcmp(str, "2x"))
800 config->input_clock = ADV7511_INPUT_CLOCK_2X;
801 else if (!strcmp(str, "ddr"))
802 config->input_clock = ADV7511_INPUT_CLOCK_DDR;
803 else
804 return -EINVAL;
805
806 if (config->input_colorspace == HDMI_COLORSPACE_YUV422 ||
807 config->input_clock != ADV7511_INPUT_CLOCK_1X) {
808 ret = of_property_read_u32(np, "adi,input-style",
809 &config->input_style);
810 if (ret)
811 return ret;
812
813 if (config->input_style < 1 || config->input_style > 3)
814 return -EINVAL;
815
816 ret = of_property_read_string(np, "adi,input-justification",
817 &str);
818 if (ret < 0)
819 return ret;
820
821 if (!strcmp(str, "left"))
822 config->input_justification =
823 ADV7511_INPUT_JUSTIFICATION_LEFT;
824 else if (!strcmp(str, "evenly"))
825 config->input_justification =
826 ADV7511_INPUT_JUSTIFICATION_EVENLY;
827 else if (!strcmp(str, "right"))
828 config->input_justification =
829 ADV7511_INPUT_JUSTIFICATION_RIGHT;
830 else
831 return -EINVAL;
832
833 } else {
834 config->input_style = 1;
835 config->input_justification = ADV7511_INPUT_JUSTIFICATION_LEFT;
836 }
837
838 of_property_read_u32(np, "adi,clock-delay", &config->clock_delay);
839 if (config->clock_delay < -1200 || config->clock_delay > 1600)
840 return -EINVAL;
841
842 config->embedded_sync = of_property_read_bool(np, "adi,embedded-sync");
843
844 /* Hardcode the sync pulse configurations for now. */
845 config->sync_pulse = ADV7511_INPUT_SYNC_PULSE_NONE;
846 config->vsync_polarity = ADV7511_SYNC_POLARITY_PASSTHROUGH;
847 config->hsync_polarity = ADV7511_SYNC_POLARITY_PASSTHROUGH;
848
849 return 0;
850 }
851
852 static const int edid_i2c_addr = 0x7e;
853 static const int packet_i2c_addr = 0x70;
854 static const int cec_i2c_addr = 0x78;
855
856 static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
857 {
858 struct adv7511_link_config link_config;
859 struct adv7511 *adv7511;
860 struct device *dev = &i2c->dev;
861 unsigned int val;
862 int ret;
863
864 if (!dev->of_node)
865 return -EINVAL;
866
867 adv7511 = devm_kzalloc(dev, sizeof(*adv7511), GFP_KERNEL);
868 if (!adv7511)
869 return -ENOMEM;
870
871 adv7511->powered = false;
872 adv7511->status = connector_status_disconnected;
873
874 ret = adv7511_parse_dt(dev->of_node, &link_config);
875 if (ret)
876 return ret;
877
878 /*
879 * The power down GPIO is optional. If present, toggle it from active to
880 * inactive to wake up the encoder.
881 */
882 adv7511->gpio_pd = devm_gpiod_get_optional(dev, "pd", GPIOD_OUT_HIGH);
883 if (IS_ERR(adv7511->gpio_pd))
884 return PTR_ERR(adv7511->gpio_pd);
885
886 if (adv7511->gpio_pd) {
887 mdelay(5);
888 gpiod_set_value_cansleep(adv7511->gpio_pd, 0);
889 }
890
891 adv7511->regmap = devm_regmap_init_i2c(i2c, &adv7511_regmap_config);
892 if (IS_ERR(adv7511->regmap))
893 return PTR_ERR(adv7511->regmap);
894
895 ret = regmap_read(adv7511->regmap, ADV7511_REG_CHIP_REVISION, &val);
896 if (ret)
897 return ret;
898 dev_dbg(dev, "Rev. %d\n", val);
899
900 ret = regmap_register_patch(adv7511->regmap, adv7511_fixed_registers,
901 ARRAY_SIZE(adv7511_fixed_registers));
902 if (ret)
903 return ret;
904
905 regmap_write(adv7511->regmap, ADV7511_REG_EDID_I2C_ADDR, edid_i2c_addr);
906 regmap_write(adv7511->regmap, ADV7511_REG_PACKET_I2C_ADDR,
907 packet_i2c_addr);
908 regmap_write(adv7511->regmap, ADV7511_REG_CEC_I2C_ADDR, cec_i2c_addr);
909 adv7511_packet_disable(adv7511, 0xffff);
910
911 adv7511->i2c_main = i2c;
912 adv7511->i2c_edid = i2c_new_dummy(i2c->adapter, edid_i2c_addr >> 1);
913 if (!adv7511->i2c_edid)
914 return -ENOMEM;
915
916 if (i2c->irq) {
917 init_waitqueue_head(&adv7511->wq);
918
919 ret = devm_request_threaded_irq(dev, i2c->irq, NULL,
920 adv7511_irq_handler,
921 IRQF_ONESHOT, dev_name(dev),
922 adv7511);
923 if (ret)
924 goto err_i2c_unregister_device;
925 }
926
927 /* CEC is unused for now */
928 regmap_write(adv7511->regmap, ADV7511_REG_CEC_CTRL,
929 ADV7511_CEC_CTRL_POWER_DOWN);
930
931 adv7511_power_off(adv7511);
932
933 i2c_set_clientdata(i2c, adv7511);
934
935 adv7511_set_link_config(adv7511, &link_config);
936
937 return 0;
938
939 err_i2c_unregister_device:
940 i2c_unregister_device(adv7511->i2c_edid);
941
942 return ret;
943 }
944
945 static int adv7511_remove(struct i2c_client *i2c)
946 {
947 struct adv7511 *adv7511 = i2c_get_clientdata(i2c);
948
949 i2c_unregister_device(adv7511->i2c_edid);
950
951 kfree(adv7511->edid);
952
953 return 0;
954 }
955
956 static int adv7511_encoder_init(struct i2c_client *i2c, struct drm_device *dev,
957 struct drm_encoder_slave *encoder)
958 {
959
960 struct adv7511 *adv7511 = i2c_get_clientdata(i2c);
961
962 encoder->slave_priv = adv7511;
963 encoder->slave_funcs = &adv7511_encoder_funcs;
964
965 adv7511->encoder = &encoder->base;
966
967 return 0;
968 }
969
970 static const struct i2c_device_id adv7511_i2c_ids[] = {
971 { "adv7511", 0 },
972 { "adv7511w", 0 },
973 { "adv7513", 0 },
974 { }
975 };
976 MODULE_DEVICE_TABLE(i2c, adv7511_i2c_ids);
977
978 static const struct of_device_id adv7511_of_ids[] = {
979 { .compatible = "adi,adv7511", },
980 { .compatible = "adi,adv7511w", },
981 { .compatible = "adi,adv7513", },
982 { }
983 };
984 MODULE_DEVICE_TABLE(of, adv7511_of_ids);
985
986 static struct drm_i2c_encoder_driver adv7511_driver = {
987 .i2c_driver = {
988 .driver = {
989 .name = "adv7511",
990 .of_match_table = adv7511_of_ids,
991 },
992 .id_table = adv7511_i2c_ids,
993 .probe = adv7511_probe,
994 .remove = adv7511_remove,
995 },
996
997 .encoder_init = adv7511_encoder_init,
998 };
999
1000 static int __init adv7511_init(void)
1001 {
1002 return drm_i2c_encoder_register(THIS_MODULE, &adv7511_driver);
1003 }
1004 module_init(adv7511_init);
1005
1006 static void __exit adv7511_exit(void)
1007 {
1008 drm_i2c_encoder_unregister(&adv7511_driver);
1009 }
1010 module_exit(adv7511_exit);
1011
1012 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
1013 MODULE_DESCRIPTION("ADV7511 HDMI transmitter driver");
1014 MODULE_LICENSE("GPL");
Linux with added FPC-III support