1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Analog Devices ADV7511 HDMI transmitter driver
4  *
5  * Copyright 2012 Analog Devices Inc.
6  */
7 
8 #include <linux/clk.h>
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 <media/cec.h>
16 
17 #include <drm/drm_atomic.h>
18 #include <drm/drm_atomic_helper.h>
19 #include <drm/drm_edid.h>
20 #include <drm/drm_print.h>
21 #include <drm/drm_probe_helper.h>
22 
23 #include "adv7511.h"
24 
25 /* ADI recommended values for proper operation. */
26 static const struct reg_sequence adv7511_fixed_registers[] = {
27 	{ 0x98, 0x03 },
28 	{ 0x9a, 0xe0 },
29 	{ 0x9c, 0x30 },
30 	{ 0x9d, 0x61 },
31 	{ 0xa2, 0xa4 },
32 	{ 0xa3, 0xa4 },
33 	{ 0xe0, 0xd0 },
34 	{ 0xf9, 0x00 },
35 	{ 0x55, 0x02 },
36 };
37 
38 /* -----------------------------------------------------------------------------
39  * Register access
40  */
41 
42 static const uint8_t adv7511_register_defaults[] = {
43 	0x12, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 00 */
44 	0x00, 0x00, 0x01, 0x0e, 0xbc, 0x18, 0x01, 0x13,
45 	0x25, 0x37, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 10 */
46 	0x46, 0x62, 0x04, 0xa8, 0x00, 0x00, 0x1c, 0x84,
47 	0x1c, 0xbf, 0x04, 0xa8, 0x1e, 0x70, 0x02, 0x1e, /* 20 */
48 	0x00, 0x00, 0x04, 0xa8, 0x08, 0x12, 0x1b, 0xac,
49 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 30 */
50 	0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00, 0xb0,
51 	0x00, 0x50, 0x90, 0x7e, 0x79, 0x70, 0x00, 0x00, /* 40 */
52 	0x00, 0xa8, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00,
53 	0x00, 0x00, 0x02, 0x0d, 0x00, 0x00, 0x00, 0x00, /* 50 */
54 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
55 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 60 */
56 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
57 	0x01, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 70 */
58 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
59 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 80 */
60 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
61 	0x00, 0x00, 0x00, 0x00, 0xc0, 0x00, 0x00, 0x00, /* 90 */
62 	0x0b, 0x02, 0x00, 0x18, 0x5a, 0x60, 0x00, 0x00,
63 	0x00, 0x00, 0x80, 0x80, 0x08, 0x04, 0x00, 0x00, /* a0 */
64 	0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x40, 0x14,
65 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* b0 */
66 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
67 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* c0 */
68 	0x00, 0x03, 0x00, 0x00, 0x02, 0x00, 0x01, 0x04,
69 	0x30, 0xff, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00, /* d0 */
70 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x01,
71 	0x80, 0x75, 0x00, 0x00, 0x60, 0x00, 0x00, 0x00, /* e0 */
72 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
73 	0x00, 0x00, 0x00, 0x00, 0x00, 0x75, 0x11, 0x00, /* f0 */
74 	0x00, 0x7c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
75 };
76 
77 static bool adv7511_register_volatile(struct device *dev, unsigned int reg)
78 {
79 	switch (reg) {
80 	case ADV7511_REG_CHIP_REVISION:
81 	case ADV7511_REG_SPDIF_FREQ:
82 	case ADV7511_REG_CTS_AUTOMATIC1:
83 	case ADV7511_REG_CTS_AUTOMATIC2:
84 	case ADV7511_REG_VIC_DETECTED:
85 	case ADV7511_REG_VIC_SEND:
86 	case ADV7511_REG_AUX_VIC_DETECTED:
87 	case ADV7511_REG_STATUS:
88 	case ADV7511_REG_GC(1):
89 	case ADV7511_REG_INT(0):
90 	case ADV7511_REG_INT(1):
91 	case ADV7511_REG_PLL_STATUS:
92 	case ADV7511_REG_AN(0):
93 	case ADV7511_REG_AN(1):
94 	case ADV7511_REG_AN(2):
95 	case ADV7511_REG_AN(3):
96 	case ADV7511_REG_AN(4):
97 	case ADV7511_REG_AN(5):
98 	case ADV7511_REG_AN(6):
99 	case ADV7511_REG_AN(7):
100 	case ADV7511_REG_HDCP_STATUS:
101 	case ADV7511_REG_BCAPS:
102 	case ADV7511_REG_BKSV(0):
103 	case ADV7511_REG_BKSV(1):
104 	case ADV7511_REG_BKSV(2):
105 	case ADV7511_REG_BKSV(3):
106 	case ADV7511_REG_BKSV(4):
107 	case ADV7511_REG_DDC_STATUS:
108 	case ADV7511_REG_EDID_READ_CTRL:
109 	case ADV7511_REG_BSTATUS(0):
110 	case ADV7511_REG_BSTATUS(1):
111 	case ADV7511_REG_CHIP_ID_HIGH:
112 	case ADV7511_REG_CHIP_ID_LOW:
113 		return true;
114 	}
115 
116 	return false;
117 }
118 
119 static const struct regmap_config adv7511_regmap_config = {
120 	.reg_bits = 8,
121 	.val_bits = 8,
122 
123 	.max_register = 0xff,
124 	.cache_type = REGCACHE_RBTREE,
125 	.reg_defaults_raw = adv7511_register_defaults,
126 	.num_reg_defaults_raw = ARRAY_SIZE(adv7511_register_defaults),
127 
128 	.volatile_reg = adv7511_register_volatile,
129 };
130 
131 /* -----------------------------------------------------------------------------
132  * Hardware configuration
133  */
134 
135 static void adv7511_set_colormap(struct adv7511 *adv7511, bool enable,
136 				 const uint16_t *coeff,
137 				 unsigned int scaling_factor)
138 {
139 	unsigned int i;
140 
141 	regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(1),
142 			   ADV7511_CSC_UPDATE_MODE, ADV7511_CSC_UPDATE_MODE);
143 
144 	if (enable) {
145 		for (i = 0; i < 12; ++i) {
146 			regmap_update_bits(adv7511->regmap,
147 					   ADV7511_REG_CSC_UPPER(i),
148 					   0x1f, coeff[i] >> 8);
149 			regmap_write(adv7511->regmap,
150 				     ADV7511_REG_CSC_LOWER(i),
151 				     coeff[i] & 0xff);
152 		}
153 	}
154 
155 	if (enable)
156 		regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(0),
157 				   0xe0, 0x80 | (scaling_factor << 5));
158 	else
159 		regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(0),
160 				   0x80, 0x00);
161 
162 	regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(1),
163 			   ADV7511_CSC_UPDATE_MODE, 0);
164 }
165 
166 static int adv7511_packet_enable(struct adv7511 *adv7511, unsigned int packet)
167 {
168 	if (packet & 0xff)
169 		regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE0,
170 				   packet, 0xff);
171 
172 	if (packet & 0xff00) {
173 		packet >>= 8;
174 		regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
175 				   packet, 0xff);
176 	}
177 
178 	return 0;
179 }
180 
181 static int adv7511_packet_disable(struct adv7511 *adv7511, unsigned int packet)
182 {
183 	if (packet & 0xff)
184 		regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE0,
185 				   packet, 0x00);
186 
187 	if (packet & 0xff00) {
188 		packet >>= 8;
189 		regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
190 				   packet, 0x00);
191 	}
192 
193 	return 0;
194 }
195 
196 /* Coefficients for adv7511 color space conversion */
197 static const uint16_t adv7511_csc_ycbcr_to_rgb[] = {
198 	0x0734, 0x04ad, 0x0000, 0x1c1b,
199 	0x1ddc, 0x04ad, 0x1f24, 0x0135,
200 	0x0000, 0x04ad, 0x087c, 0x1b77,
201 };
202 
203 static void adv7511_set_config_csc(struct adv7511 *adv7511,
204 				   struct drm_connector *connector,
205 				   bool rgb, bool hdmi_mode)
206 {
207 	struct adv7511_video_config config;
208 	bool output_format_422, output_format_ycbcr;
209 	unsigned int mode;
210 	uint8_t infoframe[17];
211 
212 	config.hdmi_mode = hdmi_mode;
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_YCBCR422) &&
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 
282 static 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 
328 static 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 | ADV7511_INT0_HPD);
342 		regmap_update_bits(adv7511->regmap,
343 				   ADV7511_REG_INT_ENABLE(1),
344 				   ADV7511_INT1_DDC_ERROR,
345 				   ADV7511_INT1_DDC_ERROR);
346 	}
347 
348 	/*
349 	 * Per spec it is allowed to pulse the HPD signal to indicate that the
350 	 * EDID information has changed. Some monitors do this when they wakeup
351 	 * from standby or are enabled. When the HPD goes low the adv7511 is
352 	 * reset and the outputs are disabled which might cause the monitor to
353 	 * go to standby again. To avoid this we ignore the HPD pin for the
354 	 * first few seconds after enabling the output. On the other hand
355 	 * adv7535 require to enable HPD Override bit for proper HPD.
356 	 */
357 	if (adv7511->type == ADV7535)
358 		regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2,
359 				   ADV7535_REG_POWER2_HPD_OVERRIDE,
360 				   ADV7535_REG_POWER2_HPD_OVERRIDE);
361 	else
362 		regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2,
363 				   ADV7511_REG_POWER2_HPD_SRC_MASK,
364 				   ADV7511_REG_POWER2_HPD_SRC_NONE);
365 }
366 
367 static void adv7511_power_on(struct adv7511 *adv7511)
368 {
369 	__adv7511_power_on(adv7511);
370 
371 	/*
372 	 * Most of the registers are reset during power down or when HPD is low.
373 	 */
374 	regcache_sync(adv7511->regmap);
375 
376 	if (adv7511->type == ADV7533 || adv7511->type == ADV7535)
377 		adv7533_dsi_power_on(adv7511);
378 	adv7511->powered = true;
379 }
380 
381 static void __adv7511_power_off(struct adv7511 *adv7511)
382 {
383 	/* TODO: setup additional power down modes */
384 	if (adv7511->type == ADV7535)
385 		regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2,
386 				   ADV7535_REG_POWER2_HPD_OVERRIDE, 0);
387 
388 	regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
389 			   ADV7511_POWER_POWER_DOWN,
390 			   ADV7511_POWER_POWER_DOWN);
391 	regmap_update_bits(adv7511->regmap,
392 			   ADV7511_REG_INT_ENABLE(1),
393 			   ADV7511_INT1_DDC_ERROR, 0);
394 	regcache_mark_dirty(adv7511->regmap);
395 }
396 
397 static void adv7511_power_off(struct adv7511 *adv7511)
398 {
399 	__adv7511_power_off(adv7511);
400 	if (adv7511->type == ADV7533 || adv7511->type == ADV7535)
401 		adv7533_dsi_power_off(adv7511);
402 	adv7511->powered = false;
403 }
404 
405 /* -----------------------------------------------------------------------------
406  * Interrupt and hotplug detection
407  */
408 
409 static bool adv7511_hpd(struct adv7511 *adv7511)
410 {
411 	unsigned int irq0;
412 	int ret;
413 
414 	ret = regmap_read(adv7511->regmap, ADV7511_REG_INT(0), &irq0);
415 	if (ret < 0)
416 		return false;
417 
418 	if (irq0 & ADV7511_INT0_HPD) {
419 		regmap_write(adv7511->regmap, ADV7511_REG_INT(0),
420 			     ADV7511_INT0_HPD);
421 		return true;
422 	}
423 
424 	return false;
425 }
426 
427 static void adv7511_hpd_work(struct work_struct *work)
428 {
429 	struct adv7511 *adv7511 = container_of(work, struct adv7511, hpd_work);
430 	enum drm_connector_status status;
431 	unsigned int val;
432 	int ret;
433 
434 	ret = regmap_read(adv7511->regmap, ADV7511_REG_STATUS, &val);
435 	if (ret < 0)
436 		status = connector_status_disconnected;
437 	else if (val & ADV7511_STATUS_HPD)
438 		status = connector_status_connected;
439 	else
440 		status = connector_status_disconnected;
441 
442 	/*
443 	 * The bridge resets its registers on unplug. So when we get a plug
444 	 * event and we're already supposed to be powered, cycle the bridge to
445 	 * restore its state.
446 	 */
447 	if (status == connector_status_connected &&
448 	    adv7511->connector.status == connector_status_disconnected &&
449 	    adv7511->powered) {
450 		regcache_mark_dirty(adv7511->regmap);
451 		adv7511_power_on(adv7511);
452 	}
453 
454 	if (adv7511->connector.status != status) {
455 		adv7511->connector.status = status;
456 
457 		if (adv7511->connector.dev) {
458 			if (status == connector_status_disconnected)
459 				cec_phys_addr_invalidate(adv7511->cec_adap);
460 			drm_kms_helper_hotplug_event(adv7511->connector.dev);
461 		} else {
462 			drm_bridge_hpd_notify(&adv7511->bridge, status);
463 		}
464 	}
465 }
466 
467 static int adv7511_irq_process(struct adv7511 *adv7511, bool process_hpd)
468 {
469 	unsigned int irq0, irq1;
470 	int ret;
471 
472 	ret = regmap_read(adv7511->regmap, ADV7511_REG_INT(0), &irq0);
473 	if (ret < 0)
474 		return ret;
475 
476 	ret = regmap_read(adv7511->regmap, ADV7511_REG_INT(1), &irq1);
477 	if (ret < 0)
478 		return ret;
479 
480 	regmap_write(adv7511->regmap, ADV7511_REG_INT(0), irq0);
481 	regmap_write(adv7511->regmap, ADV7511_REG_INT(1), irq1);
482 
483 	if (process_hpd && irq0 & ADV7511_INT0_HPD && adv7511->bridge.encoder)
484 		schedule_work(&adv7511->hpd_work);
485 
486 	if (irq0 & ADV7511_INT0_EDID_READY || irq1 & ADV7511_INT1_DDC_ERROR) {
487 		adv7511->edid_read = true;
488 
489 		if (adv7511->i2c_main->irq)
490 			wake_up_all(&adv7511->wq);
491 	}
492 
493 #ifdef CONFIG_DRM_I2C_ADV7511_CEC
494 	adv7511_cec_irq_process(adv7511, irq1);
495 #endif
496 
497 	return 0;
498 }
499 
500 static irqreturn_t adv7511_irq_handler(int irq, void *devid)
501 {
502 	struct adv7511 *adv7511 = devid;
503 	int ret;
504 
505 	ret = adv7511_irq_process(adv7511, true);
506 	return ret < 0 ? IRQ_NONE : IRQ_HANDLED;
507 }
508 
509 /* -----------------------------------------------------------------------------
510  * EDID retrieval
511  */
512 
513 static int adv7511_wait_for_edid(struct adv7511 *adv7511, int timeout)
514 {
515 	int ret;
516 
517 	if (adv7511->i2c_main->irq) {
518 		ret = wait_event_interruptible_timeout(adv7511->wq,
519 				adv7511->edid_read, msecs_to_jiffies(timeout));
520 	} else {
521 		for (; timeout > 0; timeout -= 25) {
522 			ret = adv7511_irq_process(adv7511, false);
523 			if (ret < 0)
524 				break;
525 
526 			if (adv7511->edid_read)
527 				break;
528 
529 			msleep(25);
530 		}
531 	}
532 
533 	return adv7511->edid_read ? 0 : -EIO;
534 }
535 
536 static int adv7511_get_edid_block(void *data, u8 *buf, unsigned int block,
537 				  size_t len)
538 {
539 	struct adv7511 *adv7511 = data;
540 	struct i2c_msg xfer[2];
541 	uint8_t offset;
542 	unsigned int i;
543 	int ret;
544 
545 	if (len > 128)
546 		return -EINVAL;
547 
548 	if (adv7511->current_edid_segment != block / 2) {
549 		unsigned int status;
550 
551 		ret = regmap_read(adv7511->regmap, ADV7511_REG_DDC_STATUS,
552 				  &status);
553 		if (ret < 0)
554 			return ret;
555 
556 		if (status != 2) {
557 			adv7511->edid_read = false;
558 			regmap_write(adv7511->regmap, ADV7511_REG_EDID_SEGMENT,
559 				     block);
560 			ret = adv7511_wait_for_edid(adv7511, 200);
561 			if (ret < 0)
562 				return ret;
563 		}
564 
565 		/* Break this apart, hopefully more I2C controllers will
566 		 * support 64 byte transfers than 256 byte transfers
567 		 */
568 
569 		xfer[0].addr = adv7511->i2c_edid->addr;
570 		xfer[0].flags = 0;
571 		xfer[0].len = 1;
572 		xfer[0].buf = &offset;
573 		xfer[1].addr = adv7511->i2c_edid->addr;
574 		xfer[1].flags = I2C_M_RD;
575 		xfer[1].len = 64;
576 		xfer[1].buf = adv7511->edid_buf;
577 
578 		offset = 0;
579 
580 		for (i = 0; i < 4; ++i) {
581 			ret = i2c_transfer(adv7511->i2c_edid->adapter, xfer,
582 					   ARRAY_SIZE(xfer));
583 			if (ret < 0)
584 				return ret;
585 			else if (ret != 2)
586 				return -EIO;
587 
588 			xfer[1].buf += 64;
589 			offset += 64;
590 		}
591 
592 		adv7511->current_edid_segment = block / 2;
593 	}
594 
595 	if (block % 2 == 0)
596 		memcpy(buf, adv7511->edid_buf, len);
597 	else
598 		memcpy(buf, adv7511->edid_buf + 128, len);
599 
600 	return 0;
601 }
602 
603 /* -----------------------------------------------------------------------------
604  * ADV75xx helpers
605  */
606 
607 static struct edid *adv7511_get_edid(struct adv7511 *adv7511,
608 				     struct drm_connector *connector)
609 {
610 	struct edid *edid;
611 
612 	/* Reading the EDID only works if the device is powered */
613 	if (!adv7511->powered) {
614 		unsigned int edid_i2c_addr =
615 					(adv7511->i2c_edid->addr << 1);
616 
617 		__adv7511_power_on(adv7511);
618 
619 		/* Reset the EDID_I2C_ADDR register as it might be cleared */
620 		regmap_write(adv7511->regmap, ADV7511_REG_EDID_I2C_ADDR,
621 			     edid_i2c_addr);
622 	}
623 
624 	edid = drm_do_get_edid(connector, adv7511_get_edid_block, adv7511);
625 
626 	if (!adv7511->powered)
627 		__adv7511_power_off(adv7511);
628 
629 	adv7511_set_config_csc(adv7511, connector, adv7511->rgb,
630 			       drm_detect_hdmi_monitor(edid));
631 
632 	cec_s_phys_addr_from_edid(adv7511->cec_adap, edid);
633 
634 	return edid;
635 }
636 
637 static int adv7511_get_modes(struct adv7511 *adv7511,
638 			     struct drm_connector *connector)
639 {
640 	struct edid *edid;
641 	unsigned int count;
642 
643 	edid = adv7511_get_edid(adv7511, connector);
644 
645 	drm_connector_update_edid_property(connector, edid);
646 	count = drm_add_edid_modes(connector, edid);
647 
648 	kfree(edid);
649 
650 	return count;
651 }
652 
653 static enum drm_connector_status
654 adv7511_detect(struct adv7511 *adv7511, struct drm_connector *connector)
655 {
656 	enum drm_connector_status status;
657 	unsigned int val;
658 	bool hpd;
659 	int ret;
660 
661 	ret = regmap_read(adv7511->regmap, ADV7511_REG_STATUS, &val);
662 	if (ret < 0)
663 		return connector_status_disconnected;
664 
665 	if (val & ADV7511_STATUS_HPD)
666 		status = connector_status_connected;
667 	else
668 		status = connector_status_disconnected;
669 
670 	hpd = adv7511_hpd(adv7511);
671 
672 	/* The chip resets itself when the cable is disconnected, so in case
673 	 * there is a pending HPD interrupt and the cable is connected there was
674 	 * at least one transition from disconnected to connected and the chip
675 	 * has to be reinitialized. */
676 	if (status == connector_status_connected && hpd && adv7511->powered) {
677 		regcache_mark_dirty(adv7511->regmap);
678 		adv7511_power_on(adv7511);
679 		if (connector)
680 			adv7511_get_modes(adv7511, connector);
681 		if (adv7511->status == connector_status_connected)
682 			status = connector_status_disconnected;
683 	} else {
684 		/* Renable HPD sensing */
685 		if (adv7511->type == ADV7535)
686 			regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2,
687 					   ADV7535_REG_POWER2_HPD_OVERRIDE,
688 					   ADV7535_REG_POWER2_HPD_OVERRIDE);
689 		else
690 			regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2,
691 					   ADV7511_REG_POWER2_HPD_SRC_MASK,
692 					   ADV7511_REG_POWER2_HPD_SRC_BOTH);
693 	}
694 
695 	adv7511->status = status;
696 	return status;
697 }
698 
699 static enum drm_mode_status adv7511_mode_valid(struct adv7511 *adv7511,
700 			      struct drm_display_mode *mode)
701 {
702 	if (mode->clock > 165000)
703 		return MODE_CLOCK_HIGH;
704 
705 	return MODE_OK;
706 }
707 
708 static void adv7511_mode_set(struct adv7511 *adv7511,
709 			     const struct drm_display_mode *mode,
710 			     const struct drm_display_mode *adj_mode)
711 {
712 	unsigned int low_refresh_rate;
713 	unsigned int hsync_polarity = 0;
714 	unsigned int vsync_polarity = 0;
715 
716 	if (adv7511->embedded_sync) {
717 		unsigned int hsync_offset, hsync_len;
718 		unsigned int vsync_offset, vsync_len;
719 
720 		hsync_offset = adj_mode->crtc_hsync_start -
721 			       adj_mode->crtc_hdisplay;
722 		vsync_offset = adj_mode->crtc_vsync_start -
723 			       adj_mode->crtc_vdisplay;
724 		hsync_len = adj_mode->crtc_hsync_end -
725 			    adj_mode->crtc_hsync_start;
726 		vsync_len = adj_mode->crtc_vsync_end -
727 			    adj_mode->crtc_vsync_start;
728 
729 		/* The hardware vsync generator has a off-by-one bug */
730 		vsync_offset += 1;
731 
732 		regmap_write(adv7511->regmap, ADV7511_REG_HSYNC_PLACEMENT_MSB,
733 			     ((hsync_offset >> 10) & 0x7) << 5);
734 		regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(0),
735 			     (hsync_offset >> 2) & 0xff);
736 		regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(1),
737 			     ((hsync_offset & 0x3) << 6) |
738 			     ((hsync_len >> 4) & 0x3f));
739 		regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(2),
740 			     ((hsync_len & 0xf) << 4) |
741 			     ((vsync_offset >> 6) & 0xf));
742 		regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(3),
743 			     ((vsync_offset & 0x3f) << 2) |
744 			     ((vsync_len >> 8) & 0x3));
745 		regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(4),
746 			     vsync_len & 0xff);
747 
748 		hsync_polarity = !(adj_mode->flags & DRM_MODE_FLAG_PHSYNC);
749 		vsync_polarity = !(adj_mode->flags & DRM_MODE_FLAG_PVSYNC);
750 	} else {
751 		enum adv7511_sync_polarity mode_hsync_polarity;
752 		enum adv7511_sync_polarity mode_vsync_polarity;
753 
754 		/**
755 		 * If the input signal is always low or always high we want to
756 		 * invert or let it passthrough depending on the polarity of the
757 		 * current mode.
758 		 **/
759 		if (adj_mode->flags & DRM_MODE_FLAG_NHSYNC)
760 			mode_hsync_polarity = ADV7511_SYNC_POLARITY_LOW;
761 		else
762 			mode_hsync_polarity = ADV7511_SYNC_POLARITY_HIGH;
763 
764 		if (adj_mode->flags & DRM_MODE_FLAG_NVSYNC)
765 			mode_vsync_polarity = ADV7511_SYNC_POLARITY_LOW;
766 		else
767 			mode_vsync_polarity = ADV7511_SYNC_POLARITY_HIGH;
768 
769 		if (adv7511->hsync_polarity != mode_hsync_polarity &&
770 		    adv7511->hsync_polarity !=
771 		    ADV7511_SYNC_POLARITY_PASSTHROUGH)
772 			hsync_polarity = 1;
773 
774 		if (adv7511->vsync_polarity != mode_vsync_polarity &&
775 		    adv7511->vsync_polarity !=
776 		    ADV7511_SYNC_POLARITY_PASSTHROUGH)
777 			vsync_polarity = 1;
778 	}
779 
780 	if (drm_mode_vrefresh(mode) <= 24)
781 		low_refresh_rate = ADV7511_LOW_REFRESH_RATE_24HZ;
782 	else if (drm_mode_vrefresh(mode) <= 25)
783 		low_refresh_rate = ADV7511_LOW_REFRESH_RATE_25HZ;
784 	else if (drm_mode_vrefresh(mode) <= 30)
785 		low_refresh_rate = ADV7511_LOW_REFRESH_RATE_30HZ;
786 	else
787 		low_refresh_rate = ADV7511_LOW_REFRESH_RATE_NONE;
788 
789 	regmap_update_bits(adv7511->regmap, 0xfb,
790 		0x6, low_refresh_rate << 1);
791 	regmap_update_bits(adv7511->regmap, 0x17,
792 		0x60, (vsync_polarity << 6) | (hsync_polarity << 5));
793 
794 	if (adv7511->type == ADV7533 || adv7511->type == ADV7535)
795 		adv7533_mode_set(adv7511, adj_mode);
796 
797 	drm_mode_copy(&adv7511->curr_mode, adj_mode);
798 
799 	/*
800 	 * TODO Test first order 4:2:2 to 4:4:4 up conversion method, which is
801 	 * supposed to give better results.
802 	 */
803 
804 	adv7511->f_tmds = mode->clock;
805 }
806 
807 /* -----------------------------------------------------------------------------
808  * DRM Connector Operations
809  */
810 
811 static struct adv7511 *connector_to_adv7511(struct drm_connector *connector)
812 {
813 	return container_of(connector, struct adv7511, connector);
814 }
815 
816 static int adv7511_connector_get_modes(struct drm_connector *connector)
817 {
818 	struct adv7511 *adv = connector_to_adv7511(connector);
819 
820 	return adv7511_get_modes(adv, connector);
821 }
822 
823 static enum drm_mode_status
824 adv7511_connector_mode_valid(struct drm_connector *connector,
825 			     struct drm_display_mode *mode)
826 {
827 	struct adv7511 *adv = connector_to_adv7511(connector);
828 
829 	return adv7511_mode_valid(adv, mode);
830 }
831 
832 static struct drm_connector_helper_funcs adv7511_connector_helper_funcs = {
833 	.get_modes = adv7511_connector_get_modes,
834 	.mode_valid = adv7511_connector_mode_valid,
835 };
836 
837 static enum drm_connector_status
838 adv7511_connector_detect(struct drm_connector *connector, bool force)
839 {
840 	struct adv7511 *adv = connector_to_adv7511(connector);
841 
842 	return adv7511_detect(adv, connector);
843 }
844 
845 static const struct drm_connector_funcs adv7511_connector_funcs = {
846 	.fill_modes = drm_helper_probe_single_connector_modes,
847 	.detect = adv7511_connector_detect,
848 	.destroy = drm_connector_cleanup,
849 	.reset = drm_atomic_helper_connector_reset,
850 	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
851 	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
852 };
853 
854 static int adv7511_connector_init(struct adv7511 *adv)
855 {
856 	struct drm_bridge *bridge = &adv->bridge;
857 	int ret;
858 
859 	if (!bridge->encoder) {
860 		DRM_ERROR("Parent encoder object not found");
861 		return -ENODEV;
862 	}
863 
864 	if (adv->i2c_main->irq)
865 		adv->connector.polled = DRM_CONNECTOR_POLL_HPD;
866 	else
867 		adv->connector.polled = DRM_CONNECTOR_POLL_CONNECT |
868 				DRM_CONNECTOR_POLL_DISCONNECT;
869 
870 	ret = drm_connector_init(bridge->dev, &adv->connector,
871 				 &adv7511_connector_funcs,
872 				 DRM_MODE_CONNECTOR_HDMIA);
873 	if (ret < 0) {
874 		DRM_ERROR("Failed to initialize connector with drm\n");
875 		return ret;
876 	}
877 	drm_connector_helper_add(&adv->connector,
878 				 &adv7511_connector_helper_funcs);
879 	drm_connector_attach_encoder(&adv->connector, bridge->encoder);
880 
881 	return 0;
882 }
883 
884 /* -----------------------------------------------------------------------------
885  * DRM Bridge Operations
886  */
887 
888 static struct adv7511 *bridge_to_adv7511(struct drm_bridge *bridge)
889 {
890 	return container_of(bridge, struct adv7511, bridge);
891 }
892 
893 static void adv7511_bridge_enable(struct drm_bridge *bridge)
894 {
895 	struct adv7511 *adv = bridge_to_adv7511(bridge);
896 
897 	adv7511_power_on(adv);
898 }
899 
900 static void adv7511_bridge_disable(struct drm_bridge *bridge)
901 {
902 	struct adv7511 *adv = bridge_to_adv7511(bridge);
903 
904 	adv7511_power_off(adv);
905 }
906 
907 static void adv7511_bridge_mode_set(struct drm_bridge *bridge,
908 				    const struct drm_display_mode *mode,
909 				    const struct drm_display_mode *adj_mode)
910 {
911 	struct adv7511 *adv = bridge_to_adv7511(bridge);
912 
913 	adv7511_mode_set(adv, mode, adj_mode);
914 }
915 
916 static int adv7511_bridge_attach(struct drm_bridge *bridge,
917 				 enum drm_bridge_attach_flags flags)
918 {
919 	struct adv7511 *adv = bridge_to_adv7511(bridge);
920 	int ret = 0;
921 
922 	if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
923 		ret = adv7511_connector_init(adv);
924 		if (ret < 0)
925 			return ret;
926 	}
927 
928 	if (adv->i2c_main->irq)
929 		regmap_write(adv->regmap, ADV7511_REG_INT_ENABLE(0),
930 			     ADV7511_INT0_HPD);
931 
932 	return ret;
933 }
934 
935 static enum drm_connector_status adv7511_bridge_detect(struct drm_bridge *bridge)
936 {
937 	struct adv7511 *adv = bridge_to_adv7511(bridge);
938 
939 	return adv7511_detect(adv, NULL);
940 }
941 
942 static struct edid *adv7511_bridge_get_edid(struct drm_bridge *bridge,
943 					    struct drm_connector *connector)
944 {
945 	struct adv7511 *adv = bridge_to_adv7511(bridge);
946 
947 	return adv7511_get_edid(adv, connector);
948 }
949 
950 static void adv7511_bridge_hpd_notify(struct drm_bridge *bridge,
951 				      enum drm_connector_status status)
952 {
953 	struct adv7511 *adv = bridge_to_adv7511(bridge);
954 
955 	if (status == connector_status_disconnected)
956 		cec_phys_addr_invalidate(adv->cec_adap);
957 }
958 
959 static const struct drm_bridge_funcs adv7511_bridge_funcs = {
960 	.enable = adv7511_bridge_enable,
961 	.disable = adv7511_bridge_disable,
962 	.mode_set = adv7511_bridge_mode_set,
963 	.attach = adv7511_bridge_attach,
964 	.detect = adv7511_bridge_detect,
965 	.get_edid = adv7511_bridge_get_edid,
966 	.hpd_notify = adv7511_bridge_hpd_notify,
967 };
968 
969 /* -----------------------------------------------------------------------------
970  * Probe & remove
971  */
972 
973 static const char * const adv7511_supply_names[] = {
974 	"avdd",
975 	"dvdd",
976 	"pvdd",
977 	"bgvdd",
978 	"dvdd-3v",
979 };
980 
981 static const char * const adv7533_supply_names[] = {
982 	"avdd",
983 	"dvdd",
984 	"pvdd",
985 	"a2vdd",
986 	"v3p3",
987 	"v1p2",
988 };
989 
990 static int adv7511_init_regulators(struct adv7511 *adv)
991 {
992 	struct device *dev = &adv->i2c_main->dev;
993 	const char * const *supply_names;
994 	unsigned int i;
995 	int ret;
996 
997 	if (adv->type == ADV7511) {
998 		supply_names = adv7511_supply_names;
999 		adv->num_supplies = ARRAY_SIZE(adv7511_supply_names);
1000 	} else {
1001 		supply_names = adv7533_supply_names;
1002 		adv->num_supplies = ARRAY_SIZE(adv7533_supply_names);
1003 	}
1004 
1005 	adv->supplies = devm_kcalloc(dev, adv->num_supplies,
1006 				     sizeof(*adv->supplies), GFP_KERNEL);
1007 	if (!adv->supplies)
1008 		return -ENOMEM;
1009 
1010 	for (i = 0; i < adv->num_supplies; i++)
1011 		adv->supplies[i].supply = supply_names[i];
1012 
1013 	ret = devm_regulator_bulk_get(dev, adv->num_supplies, adv->supplies);
1014 	if (ret)
1015 		return ret;
1016 
1017 	return regulator_bulk_enable(adv->num_supplies, adv->supplies);
1018 }
1019 
1020 static void adv7511_uninit_regulators(struct adv7511 *adv)
1021 {
1022 	regulator_bulk_disable(adv->num_supplies, adv->supplies);
1023 }
1024 
1025 static bool adv7511_cec_register_volatile(struct device *dev, unsigned int reg)
1026 {
1027 	struct i2c_client *i2c = to_i2c_client(dev);
1028 	struct adv7511 *adv7511 = i2c_get_clientdata(i2c);
1029 
1030 	reg -= adv7511->reg_cec_offset;
1031 
1032 	switch (reg) {
1033 	case ADV7511_REG_CEC_RX1_FRAME_HDR:
1034 	case ADV7511_REG_CEC_RX1_FRAME_DATA0 ... ADV7511_REG_CEC_RX1_FRAME_DATA0 + 14:
1035 	case ADV7511_REG_CEC_RX1_FRAME_LEN:
1036 	case ADV7511_REG_CEC_RX2_FRAME_HDR:
1037 	case ADV7511_REG_CEC_RX2_FRAME_DATA0 ... ADV7511_REG_CEC_RX2_FRAME_DATA0 + 14:
1038 	case ADV7511_REG_CEC_RX2_FRAME_LEN:
1039 	case ADV7511_REG_CEC_RX3_FRAME_HDR:
1040 	case ADV7511_REG_CEC_RX3_FRAME_DATA0 ... ADV7511_REG_CEC_RX3_FRAME_DATA0 + 14:
1041 	case ADV7511_REG_CEC_RX3_FRAME_LEN:
1042 	case ADV7511_REG_CEC_RX_STATUS:
1043 	case ADV7511_REG_CEC_RX_BUFFERS:
1044 	case ADV7511_REG_CEC_TX_LOW_DRV_CNT:
1045 		return true;
1046 	}
1047 
1048 	return false;
1049 }
1050 
1051 static const struct regmap_config adv7511_cec_regmap_config = {
1052 	.reg_bits = 8,
1053 	.val_bits = 8,
1054 
1055 	.max_register = 0xff,
1056 	.cache_type = REGCACHE_RBTREE,
1057 	.volatile_reg = adv7511_cec_register_volatile,
1058 };
1059 
1060 static int adv7511_init_cec_regmap(struct adv7511 *adv)
1061 {
1062 	int ret;
1063 
1064 	adv->i2c_cec = i2c_new_ancillary_device(adv->i2c_main, "cec",
1065 						ADV7511_CEC_I2C_ADDR_DEFAULT);
1066 	if (IS_ERR(adv->i2c_cec))
1067 		return PTR_ERR(adv->i2c_cec);
1068 	i2c_set_clientdata(adv->i2c_cec, adv);
1069 
1070 	adv->regmap_cec = devm_regmap_init_i2c(adv->i2c_cec,
1071 					&adv7511_cec_regmap_config);
1072 	if (IS_ERR(adv->regmap_cec)) {
1073 		ret = PTR_ERR(adv->regmap_cec);
1074 		goto err;
1075 	}
1076 
1077 	if (adv->type == ADV7533 || adv->type == ADV7535) {
1078 		ret = adv7533_patch_cec_registers(adv);
1079 		if (ret)
1080 			goto err;
1081 
1082 		adv->reg_cec_offset = ADV7533_REG_CEC_OFFSET;
1083 	}
1084 
1085 	return 0;
1086 err:
1087 	i2c_unregister_device(adv->i2c_cec);
1088 	return ret;
1089 }
1090 
1091 static int adv7511_parse_dt(struct device_node *np,
1092 			    struct adv7511_link_config *config)
1093 {
1094 	const char *str;
1095 	int ret;
1096 
1097 	of_property_read_u32(np, "adi,input-depth", &config->input_color_depth);
1098 	if (config->input_color_depth != 8 && config->input_color_depth != 10 &&
1099 	    config->input_color_depth != 12)
1100 		return -EINVAL;
1101 
1102 	ret = of_property_read_string(np, "adi,input-colorspace", &str);
1103 	if (ret < 0)
1104 		return ret;
1105 
1106 	if (!strcmp(str, "rgb"))
1107 		config->input_colorspace = HDMI_COLORSPACE_RGB;
1108 	else if (!strcmp(str, "yuv422"))
1109 		config->input_colorspace = HDMI_COLORSPACE_YUV422;
1110 	else if (!strcmp(str, "yuv444"))
1111 		config->input_colorspace = HDMI_COLORSPACE_YUV444;
1112 	else
1113 		return -EINVAL;
1114 
1115 	ret = of_property_read_string(np, "adi,input-clock", &str);
1116 	if (ret < 0)
1117 		return ret;
1118 
1119 	if (!strcmp(str, "1x"))
1120 		config->input_clock = ADV7511_INPUT_CLOCK_1X;
1121 	else if (!strcmp(str, "2x"))
1122 		config->input_clock = ADV7511_INPUT_CLOCK_2X;
1123 	else if (!strcmp(str, "ddr"))
1124 		config->input_clock = ADV7511_INPUT_CLOCK_DDR;
1125 	else
1126 		return -EINVAL;
1127 
1128 	if (config->input_colorspace == HDMI_COLORSPACE_YUV422 ||
1129 	    config->input_clock != ADV7511_INPUT_CLOCK_1X) {
1130 		ret = of_property_read_u32(np, "adi,input-style",
1131 					   &config->input_style);
1132 		if (ret)
1133 			return ret;
1134 
1135 		if (config->input_style < 1 || config->input_style > 3)
1136 			return -EINVAL;
1137 
1138 		ret = of_property_read_string(np, "adi,input-justification",
1139 					      &str);
1140 		if (ret < 0)
1141 			return ret;
1142 
1143 		if (!strcmp(str, "left"))
1144 			config->input_justification =
1145 				ADV7511_INPUT_JUSTIFICATION_LEFT;
1146 		else if (!strcmp(str, "evenly"))
1147 			config->input_justification =
1148 				ADV7511_INPUT_JUSTIFICATION_EVENLY;
1149 		else if (!strcmp(str, "right"))
1150 			config->input_justification =
1151 				ADV7511_INPUT_JUSTIFICATION_RIGHT;
1152 		else
1153 			return -EINVAL;
1154 
1155 	} else {
1156 		config->input_style = 1;
1157 		config->input_justification = ADV7511_INPUT_JUSTIFICATION_LEFT;
1158 	}
1159 
1160 	of_property_read_u32(np, "adi,clock-delay", &config->clock_delay);
1161 	if (config->clock_delay < -1200 || config->clock_delay > 1600)
1162 		return -EINVAL;
1163 
1164 	config->embedded_sync = of_property_read_bool(np, "adi,embedded-sync");
1165 
1166 	/* Hardcode the sync pulse configurations for now. */
1167 	config->sync_pulse = ADV7511_INPUT_SYNC_PULSE_NONE;
1168 	config->vsync_polarity = ADV7511_SYNC_POLARITY_PASSTHROUGH;
1169 	config->hsync_polarity = ADV7511_SYNC_POLARITY_PASSTHROUGH;
1170 
1171 	return 0;
1172 }
1173 
1174 static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
1175 {
1176 	struct adv7511_link_config link_config;
1177 	struct adv7511 *adv7511;
1178 	struct device *dev = &i2c->dev;
1179 	unsigned int val;
1180 	int ret;
1181 
1182 	if (!dev->of_node)
1183 		return -EINVAL;
1184 
1185 	adv7511 = devm_kzalloc(dev, sizeof(*adv7511), GFP_KERNEL);
1186 	if (!adv7511)
1187 		return -ENOMEM;
1188 
1189 	adv7511->i2c_main = i2c;
1190 	adv7511->powered = false;
1191 	adv7511->status = connector_status_disconnected;
1192 
1193 	if (dev->of_node)
1194 		adv7511->type = (enum adv7511_type)of_device_get_match_data(dev);
1195 	else
1196 		adv7511->type = id->driver_data;
1197 
1198 	memset(&link_config, 0, sizeof(link_config));
1199 
1200 	if (adv7511->type == ADV7511)
1201 		ret = adv7511_parse_dt(dev->of_node, &link_config);
1202 	else
1203 		ret = adv7533_parse_dt(dev->of_node, adv7511);
1204 	if (ret)
1205 		return ret;
1206 
1207 	ret = adv7511_init_regulators(adv7511);
1208 	if (ret) {
1209 		dev_err(dev, "failed to init regulators\n");
1210 		return ret;
1211 	}
1212 
1213 	/*
1214 	 * The power down GPIO is optional. If present, toggle it from active to
1215 	 * inactive to wake up the encoder.
1216 	 */
1217 	adv7511->gpio_pd = devm_gpiod_get_optional(dev, "pd", GPIOD_OUT_HIGH);
1218 	if (IS_ERR(adv7511->gpio_pd)) {
1219 		ret = PTR_ERR(adv7511->gpio_pd);
1220 		goto uninit_regulators;
1221 	}
1222 
1223 	if (adv7511->gpio_pd) {
1224 		usleep_range(5000, 6000);
1225 		gpiod_set_value_cansleep(adv7511->gpio_pd, 0);
1226 	}
1227 
1228 	adv7511->regmap = devm_regmap_init_i2c(i2c, &adv7511_regmap_config);
1229 	if (IS_ERR(adv7511->regmap)) {
1230 		ret = PTR_ERR(adv7511->regmap);
1231 		goto uninit_regulators;
1232 	}
1233 
1234 	ret = regmap_read(adv7511->regmap, ADV7511_REG_CHIP_REVISION, &val);
1235 	if (ret)
1236 		goto uninit_regulators;
1237 	dev_dbg(dev, "Rev. %d\n", val);
1238 
1239 	if (adv7511->type == ADV7511)
1240 		ret = regmap_register_patch(adv7511->regmap,
1241 					    adv7511_fixed_registers,
1242 					    ARRAY_SIZE(adv7511_fixed_registers));
1243 	else
1244 		ret = adv7533_patch_registers(adv7511);
1245 	if (ret)
1246 		goto uninit_regulators;
1247 
1248 	adv7511_packet_disable(adv7511, 0xffff);
1249 
1250 	adv7511->i2c_edid = i2c_new_ancillary_device(i2c, "edid",
1251 					ADV7511_EDID_I2C_ADDR_DEFAULT);
1252 	if (IS_ERR(adv7511->i2c_edid)) {
1253 		ret = PTR_ERR(adv7511->i2c_edid);
1254 		goto uninit_regulators;
1255 	}
1256 
1257 	regmap_write(adv7511->regmap, ADV7511_REG_EDID_I2C_ADDR,
1258 		     adv7511->i2c_edid->addr << 1);
1259 
1260 	adv7511->i2c_packet = i2c_new_ancillary_device(i2c, "packet",
1261 					ADV7511_PACKET_I2C_ADDR_DEFAULT);
1262 	if (IS_ERR(adv7511->i2c_packet)) {
1263 		ret = PTR_ERR(adv7511->i2c_packet);
1264 		goto err_i2c_unregister_edid;
1265 	}
1266 
1267 	regmap_write(adv7511->regmap, ADV7511_REG_PACKET_I2C_ADDR,
1268 		     adv7511->i2c_packet->addr << 1);
1269 
1270 	ret = adv7511_init_cec_regmap(adv7511);
1271 	if (ret)
1272 		goto err_i2c_unregister_packet;
1273 
1274 	regmap_write(adv7511->regmap, ADV7511_REG_CEC_I2C_ADDR,
1275 		     adv7511->i2c_cec->addr << 1);
1276 
1277 	INIT_WORK(&adv7511->hpd_work, adv7511_hpd_work);
1278 
1279 	if (i2c->irq) {
1280 		init_waitqueue_head(&adv7511->wq);
1281 
1282 		ret = devm_request_threaded_irq(dev, i2c->irq, NULL,
1283 						adv7511_irq_handler,
1284 						IRQF_ONESHOT, dev_name(dev),
1285 						adv7511);
1286 		if (ret)
1287 			goto err_unregister_cec;
1288 	}
1289 
1290 	adv7511_power_off(adv7511);
1291 
1292 	i2c_set_clientdata(i2c, adv7511);
1293 
1294 	if (adv7511->type == ADV7511)
1295 		adv7511_set_link_config(adv7511, &link_config);
1296 
1297 	ret = adv7511_cec_init(dev, adv7511);
1298 	if (ret)
1299 		goto err_unregister_cec;
1300 
1301 	adv7511->bridge.funcs = &adv7511_bridge_funcs;
1302 	adv7511->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID;
1303 	if (adv7511->i2c_main->irq)
1304 		adv7511->bridge.ops |= DRM_BRIDGE_OP_HPD;
1305 
1306 	adv7511->bridge.of_node = dev->of_node;
1307 	adv7511->bridge.type = DRM_MODE_CONNECTOR_HDMIA;
1308 
1309 	drm_bridge_add(&adv7511->bridge);
1310 
1311 	adv7511_audio_init(dev, adv7511);
1312 
1313 	if (adv7511->type == ADV7533 || adv7511->type == ADV7535) {
1314 		ret = adv7533_attach_dsi(adv7511);
1315 		if (ret)
1316 			goto err_unregister_audio;
1317 	}
1318 
1319 	return 0;
1320 
1321 err_unregister_audio:
1322 	adv7511_audio_exit(adv7511);
1323 	drm_bridge_remove(&adv7511->bridge);
1324 err_unregister_cec:
1325 	cec_unregister_adapter(adv7511->cec_adap);
1326 	i2c_unregister_device(adv7511->i2c_cec);
1327 	clk_disable_unprepare(adv7511->cec_clk);
1328 err_i2c_unregister_packet:
1329 	i2c_unregister_device(adv7511->i2c_packet);
1330 err_i2c_unregister_edid:
1331 	i2c_unregister_device(adv7511->i2c_edid);
1332 uninit_regulators:
1333 	adv7511_uninit_regulators(adv7511);
1334 
1335 	return ret;
1336 }
1337 
1338 static int adv7511_remove(struct i2c_client *i2c)
1339 {
1340 	struct adv7511 *adv7511 = i2c_get_clientdata(i2c);
1341 
1342 	i2c_unregister_device(adv7511->i2c_cec);
1343 	clk_disable_unprepare(adv7511->cec_clk);
1344 
1345 	adv7511_uninit_regulators(adv7511);
1346 
1347 	drm_bridge_remove(&adv7511->bridge);
1348 
1349 	adv7511_audio_exit(adv7511);
1350 
1351 	cec_unregister_adapter(adv7511->cec_adap);
1352 
1353 	i2c_unregister_device(adv7511->i2c_packet);
1354 	i2c_unregister_device(adv7511->i2c_edid);
1355 
1356 	return 0;
1357 }
1358 
1359 static const struct i2c_device_id adv7511_i2c_ids[] = {
1360 	{ "adv7511", ADV7511 },
1361 	{ "adv7511w", ADV7511 },
1362 	{ "adv7513", ADV7511 },
1363 	{ "adv7533", ADV7533 },
1364 	{ "adv7535", ADV7535 },
1365 	{ }
1366 };
1367 MODULE_DEVICE_TABLE(i2c, adv7511_i2c_ids);
1368 
1369 static const struct of_device_id adv7511_of_ids[] = {
1370 	{ .compatible = "adi,adv7511", .data = (void *)ADV7511 },
1371 	{ .compatible = "adi,adv7511w", .data = (void *)ADV7511 },
1372 	{ .compatible = "adi,adv7513", .data = (void *)ADV7511 },
1373 	{ .compatible = "adi,adv7533", .data = (void *)ADV7533 },
1374 	{ .compatible = "adi,adv7535", .data = (void *)ADV7535 },
1375 	{ }
1376 };
1377 MODULE_DEVICE_TABLE(of, adv7511_of_ids);
1378 
1379 static struct mipi_dsi_driver adv7533_dsi_driver = {
1380 	.driver.name = "adv7533",
1381 };
1382 
1383 static struct i2c_driver adv7511_driver = {
1384 	.driver = {
1385 		.name = "adv7511",
1386 		.of_match_table = adv7511_of_ids,
1387 	},
1388 	.id_table = adv7511_i2c_ids,
1389 	.probe = adv7511_probe,
1390 	.remove = adv7511_remove,
1391 };
1392 
1393 static int __init adv7511_init(void)
1394 {
1395 	if (IS_ENABLED(CONFIG_DRM_MIPI_DSI))
1396 		mipi_dsi_driver_register(&adv7533_dsi_driver);
1397 
1398 	return i2c_add_driver(&adv7511_driver);
1399 }
1400 module_init(adv7511_init);
1401 
1402 static void __exit adv7511_exit(void)
1403 {
1404 	i2c_del_driver(&adv7511_driver);
1405 
1406 	if (IS_ENABLED(CONFIG_DRM_MIPI_DSI))
1407 		mipi_dsi_driver_unregister(&adv7533_dsi_driver);
1408 }
1409 module_exit(adv7511_exit);
1410 
1411 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
1412 MODULE_DESCRIPTION("ADV7511 HDMI transmitter driver");
1413 MODULE_LICENSE("GPL");
1414