1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * DesignWare High-Definition Multimedia Interface (HDMI) driver
4  *
5  * Copyright (C) 2013-2015 Mentor Graphics Inc.
6  * Copyright (C) 2011-2013 Freescale Semiconductor, Inc.
7  * Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
8  */
9 #include <linux/clk.h>
10 #include <linux/delay.h>
11 #include <linux/err.h>
12 #include <linux/hdmi.h>
13 #include <linux/i2c.h>
14 #include <linux/irq.h>
15 #include <linux/module.h>
16 #include <linux/mutex.h>
17 #include <linux/of_device.h>
18 #include <linux/pinctrl/consumer.h>
19 #include <linux/regmap.h>
20 #include <linux/dma-mapping.h>
21 #include <linux/spinlock.h>
22 
23 #include <media/cec-notifier.h>
24 
25 #include <uapi/linux/media-bus-format.h>
26 #include <uapi/linux/videodev2.h>
27 
28 #include <drm/bridge/dw_hdmi.h>
29 #include <drm/display/drm_hdmi_helper.h>
30 #include <drm/display/drm_scdc_helper.h>
31 #include <drm/drm_atomic.h>
32 #include <drm/drm_atomic_helper.h>
33 #include <drm/drm_bridge.h>
34 #include <drm/drm_of.h>
35 #include <drm/drm_print.h>
36 #include <drm/drm_probe_helper.h>
37 
38 #include "dw-hdmi-audio.h"
39 #include "dw-hdmi-cec.h"
40 #include "dw-hdmi.h"
41 
42 #define DDC_CI_ADDR		0x37
43 #define DDC_SEGMENT_ADDR	0x30
44 
45 #define HDMI_EDID_LEN		512
46 
47 /* DW-HDMI Controller >= 0x200a are at least compliant with SCDC version 1 */
48 #define SCDC_MIN_SOURCE_VERSION	0x1
49 
50 #define HDMI14_MAX_TMDSCLK	340000000
51 
52 enum hdmi_datamap {
53 	RGB444_8B = 0x01,
54 	RGB444_10B = 0x03,
55 	RGB444_12B = 0x05,
56 	RGB444_16B = 0x07,
57 	YCbCr444_8B = 0x09,
58 	YCbCr444_10B = 0x0B,
59 	YCbCr444_12B = 0x0D,
60 	YCbCr444_16B = 0x0F,
61 	YCbCr422_8B = 0x16,
62 	YCbCr422_10B = 0x14,
63 	YCbCr422_12B = 0x12,
64 };
65 
66 static const u16 csc_coeff_default[3][4] = {
67 	{ 0x2000, 0x0000, 0x0000, 0x0000 },
68 	{ 0x0000, 0x2000, 0x0000, 0x0000 },
69 	{ 0x0000, 0x0000, 0x2000, 0x0000 }
70 };
71 
72 static const u16 csc_coeff_rgb_out_eitu601[3][4] = {
73 	{ 0x2000, 0x6926, 0x74fd, 0x010e },
74 	{ 0x2000, 0x2cdd, 0x0000, 0x7e9a },
75 	{ 0x2000, 0x0000, 0x38b4, 0x7e3b }
76 };
77 
78 static const u16 csc_coeff_rgb_out_eitu709[3][4] = {
79 	{ 0x2000, 0x7106, 0x7a02, 0x00a7 },
80 	{ 0x2000, 0x3264, 0x0000, 0x7e6d },
81 	{ 0x2000, 0x0000, 0x3b61, 0x7e25 }
82 };
83 
84 static const u16 csc_coeff_rgb_in_eitu601[3][4] = {
85 	{ 0x2591, 0x1322, 0x074b, 0x0000 },
86 	{ 0x6535, 0x2000, 0x7acc, 0x0200 },
87 	{ 0x6acd, 0x7534, 0x2000, 0x0200 }
88 };
89 
90 static const u16 csc_coeff_rgb_in_eitu709[3][4] = {
91 	{ 0x2dc5, 0x0d9b, 0x049e, 0x0000 },
92 	{ 0x62f0, 0x2000, 0x7d11, 0x0200 },
93 	{ 0x6756, 0x78ab, 0x2000, 0x0200 }
94 };
95 
96 static const u16 csc_coeff_rgb_full_to_rgb_limited[3][4] = {
97 	{ 0x1b7c, 0x0000, 0x0000, 0x0020 },
98 	{ 0x0000, 0x1b7c, 0x0000, 0x0020 },
99 	{ 0x0000, 0x0000, 0x1b7c, 0x0020 }
100 };
101 
102 struct hdmi_vmode {
103 	bool mdataenablepolarity;
104 
105 	unsigned int mpixelclock;
106 	unsigned int mpixelrepetitioninput;
107 	unsigned int mpixelrepetitionoutput;
108 	unsigned int mtmdsclock;
109 };
110 
111 struct hdmi_data_info {
112 	unsigned int enc_in_bus_format;
113 	unsigned int enc_out_bus_format;
114 	unsigned int enc_in_encoding;
115 	unsigned int enc_out_encoding;
116 	unsigned int pix_repet_factor;
117 	unsigned int hdcp_enable;
118 	struct hdmi_vmode video_mode;
119 	bool rgb_limited_range;
120 };
121 
122 struct dw_hdmi_i2c {
123 	struct i2c_adapter	adap;
124 
125 	struct mutex		lock;	/* used to serialize data transfers */
126 	struct completion	cmp;
127 	u8			stat;
128 
129 	u8			slave_reg;
130 	bool			is_regaddr;
131 	bool			is_segment;
132 };
133 
134 struct dw_hdmi_phy_data {
135 	enum dw_hdmi_phy_type type;
136 	const char *name;
137 	unsigned int gen;
138 	bool has_svsret;
139 	int (*configure)(struct dw_hdmi *hdmi,
140 			 const struct dw_hdmi_plat_data *pdata,
141 			 unsigned long mpixelclock);
142 };
143 
144 struct dw_hdmi {
145 	struct drm_connector connector;
146 	struct drm_bridge bridge;
147 	struct drm_bridge *next_bridge;
148 
149 	unsigned int version;
150 
151 	struct platform_device *audio;
152 	struct platform_device *cec;
153 	struct device *dev;
154 	struct clk *isfr_clk;
155 	struct clk *iahb_clk;
156 	struct clk *cec_clk;
157 	struct dw_hdmi_i2c *i2c;
158 
159 	struct hdmi_data_info hdmi_data;
160 	const struct dw_hdmi_plat_data *plat_data;
161 
162 	int vic;
163 
164 	u8 edid[HDMI_EDID_LEN];
165 
166 	struct {
167 		const struct dw_hdmi_phy_ops *ops;
168 		const char *name;
169 		void *data;
170 		bool enabled;
171 	} phy;
172 
173 	struct drm_display_mode previous_mode;
174 
175 	struct i2c_adapter *ddc;
176 	void __iomem *regs;
177 	bool sink_is_hdmi;
178 	bool sink_has_audio;
179 
180 	struct pinctrl *pinctrl;
181 	struct pinctrl_state *default_state;
182 	struct pinctrl_state *unwedge_state;
183 
184 	struct mutex mutex;		/* for state below and previous_mode */
185 	enum drm_connector_force force;	/* mutex-protected force state */
186 	struct drm_connector *curr_conn;/* current connector (only valid when !disabled) */
187 	bool disabled;			/* DRM has disabled our bridge */
188 	bool bridge_is_on;		/* indicates the bridge is on */
189 	bool rxsense;			/* rxsense state */
190 	u8 phy_mask;			/* desired phy int mask settings */
191 	u8 mc_clkdis;			/* clock disable register */
192 
193 	spinlock_t audio_lock;
194 	struct mutex audio_mutex;
195 	unsigned int sample_non_pcm;
196 	unsigned int sample_width;
197 	unsigned int sample_rate;
198 	unsigned int channels;
199 	unsigned int audio_cts;
200 	unsigned int audio_n;
201 	bool audio_enable;
202 
203 	unsigned int reg_shift;
204 	struct regmap *regm;
205 	void (*enable_audio)(struct dw_hdmi *hdmi);
206 	void (*disable_audio)(struct dw_hdmi *hdmi);
207 
208 	struct mutex cec_notifier_mutex;
209 	struct cec_notifier *cec_notifier;
210 
211 	hdmi_codec_plugged_cb plugged_cb;
212 	struct device *codec_dev;
213 	enum drm_connector_status last_connector_result;
214 };
215 
216 #define HDMI_IH_PHY_STAT0_RX_SENSE \
217 	(HDMI_IH_PHY_STAT0_RX_SENSE0 | HDMI_IH_PHY_STAT0_RX_SENSE1 | \
218 	 HDMI_IH_PHY_STAT0_RX_SENSE2 | HDMI_IH_PHY_STAT0_RX_SENSE3)
219 
220 #define HDMI_PHY_RX_SENSE \
221 	(HDMI_PHY_RX_SENSE0 | HDMI_PHY_RX_SENSE1 | \
222 	 HDMI_PHY_RX_SENSE2 | HDMI_PHY_RX_SENSE3)
223 
224 static inline void hdmi_writeb(struct dw_hdmi *hdmi, u8 val, int offset)
225 {
226 	regmap_write(hdmi->regm, offset << hdmi->reg_shift, val);
227 }
228 
229 static inline u8 hdmi_readb(struct dw_hdmi *hdmi, int offset)
230 {
231 	unsigned int val = 0;
232 
233 	regmap_read(hdmi->regm, offset << hdmi->reg_shift, &val);
234 
235 	return val;
236 }
237 
238 static void handle_plugged_change(struct dw_hdmi *hdmi, bool plugged)
239 {
240 	if (hdmi->plugged_cb && hdmi->codec_dev)
241 		hdmi->plugged_cb(hdmi->codec_dev, plugged);
242 }
243 
244 int dw_hdmi_set_plugged_cb(struct dw_hdmi *hdmi, hdmi_codec_plugged_cb fn,
245 			   struct device *codec_dev)
246 {
247 	bool plugged;
248 
249 	mutex_lock(&hdmi->mutex);
250 	hdmi->plugged_cb = fn;
251 	hdmi->codec_dev = codec_dev;
252 	plugged = hdmi->last_connector_result == connector_status_connected;
253 	handle_plugged_change(hdmi, plugged);
254 	mutex_unlock(&hdmi->mutex);
255 
256 	return 0;
257 }
258 EXPORT_SYMBOL_GPL(dw_hdmi_set_plugged_cb);
259 
260 static void hdmi_modb(struct dw_hdmi *hdmi, u8 data, u8 mask, unsigned reg)
261 {
262 	regmap_update_bits(hdmi->regm, reg << hdmi->reg_shift, mask, data);
263 }
264 
265 static void hdmi_mask_writeb(struct dw_hdmi *hdmi, u8 data, unsigned int reg,
266 			     u8 shift, u8 mask)
267 {
268 	hdmi_modb(hdmi, data << shift, mask, reg);
269 }
270 
271 static void dw_hdmi_i2c_init(struct dw_hdmi *hdmi)
272 {
273 	hdmi_writeb(hdmi, HDMI_PHY_I2CM_INT_ADDR_DONE_POL,
274 		    HDMI_PHY_I2CM_INT_ADDR);
275 
276 	hdmi_writeb(hdmi, HDMI_PHY_I2CM_CTLINT_ADDR_NAC_POL |
277 		    HDMI_PHY_I2CM_CTLINT_ADDR_ARBITRATION_POL,
278 		    HDMI_PHY_I2CM_CTLINT_ADDR);
279 
280 	/* Software reset */
281 	hdmi_writeb(hdmi, 0x00, HDMI_I2CM_SOFTRSTZ);
282 
283 	/* Set Standard Mode speed (determined to be 100KHz on iMX6) */
284 	hdmi_writeb(hdmi, 0x00, HDMI_I2CM_DIV);
285 
286 	/* Set done, not acknowledged and arbitration interrupt polarities */
287 	hdmi_writeb(hdmi, HDMI_I2CM_INT_DONE_POL, HDMI_I2CM_INT);
288 	hdmi_writeb(hdmi, HDMI_I2CM_CTLINT_NAC_POL | HDMI_I2CM_CTLINT_ARB_POL,
289 		    HDMI_I2CM_CTLINT);
290 
291 	/* Clear DONE and ERROR interrupts */
292 	hdmi_writeb(hdmi, HDMI_IH_I2CM_STAT0_ERROR | HDMI_IH_I2CM_STAT0_DONE,
293 		    HDMI_IH_I2CM_STAT0);
294 
295 	/* Mute DONE and ERROR interrupts */
296 	hdmi_writeb(hdmi, HDMI_IH_I2CM_STAT0_ERROR | HDMI_IH_I2CM_STAT0_DONE,
297 		    HDMI_IH_MUTE_I2CM_STAT0);
298 }
299 
300 static bool dw_hdmi_i2c_unwedge(struct dw_hdmi *hdmi)
301 {
302 	/* If no unwedge state then give up */
303 	if (!hdmi->unwedge_state)
304 		return false;
305 
306 	dev_info(hdmi->dev, "Attempting to unwedge stuck i2c bus\n");
307 
308 	/*
309 	 * This is a huge hack to workaround a problem where the dw_hdmi i2c
310 	 * bus could sometimes get wedged.  Once wedged there doesn't appear
311 	 * to be any way to unwedge it (including the HDMI_I2CM_SOFTRSTZ)
312 	 * other than pulsing the SDA line.
313 	 *
314 	 * We appear to be able to pulse the SDA line (in the eyes of dw_hdmi)
315 	 * by:
316 	 * 1. Remux the pin as a GPIO output, driven low.
317 	 * 2. Wait a little while.  1 ms seems to work, but we'll do 10.
318 	 * 3. Immediately jump to remux the pin as dw_hdmi i2c again.
319 	 *
320 	 * At the moment of remuxing, the line will still be low due to its
321 	 * recent stint as an output, but then it will be pulled high by the
322 	 * (presumed) external pullup.  dw_hdmi seems to see this as a rising
323 	 * edge and that seems to get it out of its jam.
324 	 *
325 	 * This wedging was only ever seen on one TV, and only on one of
326 	 * its HDMI ports.  It happened when the TV was powered on while the
327 	 * device was plugged in.  A scope trace shows the TV bringing both SDA
328 	 * and SCL low, then bringing them both back up at roughly the same
329 	 * time.  Presumably this confuses dw_hdmi because it saw activity but
330 	 * no real STOP (maybe it thinks there's another master on the bus?).
331 	 * Giving it a clean rising edge of SDA while SCL is already high
332 	 * presumably makes dw_hdmi see a STOP which seems to bring dw_hdmi out
333 	 * of its stupor.
334 	 *
335 	 * Note that after coming back alive, transfers seem to immediately
336 	 * resume, so if we unwedge due to a timeout we should wait a little
337 	 * longer for our transfer to finish, since it might have just started
338 	 * now.
339 	 */
340 	pinctrl_select_state(hdmi->pinctrl, hdmi->unwedge_state);
341 	msleep(10);
342 	pinctrl_select_state(hdmi->pinctrl, hdmi->default_state);
343 
344 	return true;
345 }
346 
347 static int dw_hdmi_i2c_wait(struct dw_hdmi *hdmi)
348 {
349 	struct dw_hdmi_i2c *i2c = hdmi->i2c;
350 	int stat;
351 
352 	stat = wait_for_completion_timeout(&i2c->cmp, HZ / 10);
353 	if (!stat) {
354 		/* If we can't unwedge, return timeout */
355 		if (!dw_hdmi_i2c_unwedge(hdmi))
356 			return -EAGAIN;
357 
358 		/* We tried to unwedge; give it another chance */
359 		stat = wait_for_completion_timeout(&i2c->cmp, HZ / 10);
360 		if (!stat)
361 			return -EAGAIN;
362 	}
363 
364 	/* Check for error condition on the bus */
365 	if (i2c->stat & HDMI_IH_I2CM_STAT0_ERROR)
366 		return -EIO;
367 
368 	return 0;
369 }
370 
371 static int dw_hdmi_i2c_read(struct dw_hdmi *hdmi,
372 			    unsigned char *buf, unsigned int length)
373 {
374 	struct dw_hdmi_i2c *i2c = hdmi->i2c;
375 	int ret;
376 
377 	if (!i2c->is_regaddr) {
378 		dev_dbg(hdmi->dev, "set read register address to 0\n");
379 		i2c->slave_reg = 0x00;
380 		i2c->is_regaddr = true;
381 	}
382 
383 	while (length--) {
384 		reinit_completion(&i2c->cmp);
385 
386 		hdmi_writeb(hdmi, i2c->slave_reg++, HDMI_I2CM_ADDRESS);
387 		if (i2c->is_segment)
388 			hdmi_writeb(hdmi, HDMI_I2CM_OPERATION_READ_EXT,
389 				    HDMI_I2CM_OPERATION);
390 		else
391 			hdmi_writeb(hdmi, HDMI_I2CM_OPERATION_READ,
392 				    HDMI_I2CM_OPERATION);
393 
394 		ret = dw_hdmi_i2c_wait(hdmi);
395 		if (ret)
396 			return ret;
397 
398 		*buf++ = hdmi_readb(hdmi, HDMI_I2CM_DATAI);
399 	}
400 	i2c->is_segment = false;
401 
402 	return 0;
403 }
404 
405 static int dw_hdmi_i2c_write(struct dw_hdmi *hdmi,
406 			     unsigned char *buf, unsigned int length)
407 {
408 	struct dw_hdmi_i2c *i2c = hdmi->i2c;
409 	int ret;
410 
411 	if (!i2c->is_regaddr) {
412 		/* Use the first write byte as register address */
413 		i2c->slave_reg = buf[0];
414 		length--;
415 		buf++;
416 		i2c->is_regaddr = true;
417 	}
418 
419 	while (length--) {
420 		reinit_completion(&i2c->cmp);
421 
422 		hdmi_writeb(hdmi, *buf++, HDMI_I2CM_DATAO);
423 		hdmi_writeb(hdmi, i2c->slave_reg++, HDMI_I2CM_ADDRESS);
424 		hdmi_writeb(hdmi, HDMI_I2CM_OPERATION_WRITE,
425 			    HDMI_I2CM_OPERATION);
426 
427 		ret = dw_hdmi_i2c_wait(hdmi);
428 		if (ret)
429 			return ret;
430 	}
431 
432 	return 0;
433 }
434 
435 static int dw_hdmi_i2c_xfer(struct i2c_adapter *adap,
436 			    struct i2c_msg *msgs, int num)
437 {
438 	struct dw_hdmi *hdmi = i2c_get_adapdata(adap);
439 	struct dw_hdmi_i2c *i2c = hdmi->i2c;
440 	u8 addr = msgs[0].addr;
441 	int i, ret = 0;
442 
443 	if (addr == DDC_CI_ADDR)
444 		/*
445 		 * The internal I2C controller does not support the multi-byte
446 		 * read and write operations needed for DDC/CI.
447 		 * TOFIX: Blacklist the DDC/CI address until we filter out
448 		 * unsupported I2C operations.
449 		 */
450 		return -EOPNOTSUPP;
451 
452 	dev_dbg(hdmi->dev, "xfer: num: %d, addr: %#x\n", num, addr);
453 
454 	for (i = 0; i < num; i++) {
455 		if (msgs[i].len == 0) {
456 			dev_dbg(hdmi->dev,
457 				"unsupported transfer %d/%d, no data\n",
458 				i + 1, num);
459 			return -EOPNOTSUPP;
460 		}
461 	}
462 
463 	mutex_lock(&i2c->lock);
464 
465 	/* Unmute DONE and ERROR interrupts */
466 	hdmi_writeb(hdmi, 0x00, HDMI_IH_MUTE_I2CM_STAT0);
467 
468 	/* Set slave device address taken from the first I2C message */
469 	hdmi_writeb(hdmi, addr, HDMI_I2CM_SLAVE);
470 
471 	/* Set slave device register address on transfer */
472 	i2c->is_regaddr = false;
473 
474 	/* Set segment pointer for I2C extended read mode operation */
475 	i2c->is_segment = false;
476 
477 	for (i = 0; i < num; i++) {
478 		dev_dbg(hdmi->dev, "xfer: num: %d/%d, len: %d, flags: %#x\n",
479 			i + 1, num, msgs[i].len, msgs[i].flags);
480 		if (msgs[i].addr == DDC_SEGMENT_ADDR && msgs[i].len == 1) {
481 			i2c->is_segment = true;
482 			hdmi_writeb(hdmi, DDC_SEGMENT_ADDR, HDMI_I2CM_SEGADDR);
483 			hdmi_writeb(hdmi, *msgs[i].buf, HDMI_I2CM_SEGPTR);
484 		} else {
485 			if (msgs[i].flags & I2C_M_RD)
486 				ret = dw_hdmi_i2c_read(hdmi, msgs[i].buf,
487 						       msgs[i].len);
488 			else
489 				ret = dw_hdmi_i2c_write(hdmi, msgs[i].buf,
490 							msgs[i].len);
491 		}
492 		if (ret < 0)
493 			break;
494 	}
495 
496 	if (!ret)
497 		ret = num;
498 
499 	/* Mute DONE and ERROR interrupts */
500 	hdmi_writeb(hdmi, HDMI_IH_I2CM_STAT0_ERROR | HDMI_IH_I2CM_STAT0_DONE,
501 		    HDMI_IH_MUTE_I2CM_STAT0);
502 
503 	mutex_unlock(&i2c->lock);
504 
505 	return ret;
506 }
507 
508 static u32 dw_hdmi_i2c_func(struct i2c_adapter *adapter)
509 {
510 	return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
511 }
512 
513 static const struct i2c_algorithm dw_hdmi_algorithm = {
514 	.master_xfer	= dw_hdmi_i2c_xfer,
515 	.functionality	= dw_hdmi_i2c_func,
516 };
517 
518 static struct i2c_adapter *dw_hdmi_i2c_adapter(struct dw_hdmi *hdmi)
519 {
520 	struct i2c_adapter *adap;
521 	struct dw_hdmi_i2c *i2c;
522 	int ret;
523 
524 	i2c = devm_kzalloc(hdmi->dev, sizeof(*i2c), GFP_KERNEL);
525 	if (!i2c)
526 		return ERR_PTR(-ENOMEM);
527 
528 	mutex_init(&i2c->lock);
529 	init_completion(&i2c->cmp);
530 
531 	adap = &i2c->adap;
532 	adap->class = I2C_CLASS_DDC;
533 	adap->owner = THIS_MODULE;
534 	adap->dev.parent = hdmi->dev;
535 	adap->algo = &dw_hdmi_algorithm;
536 	strlcpy(adap->name, "DesignWare HDMI", sizeof(adap->name));
537 	i2c_set_adapdata(adap, hdmi);
538 
539 	ret = i2c_add_adapter(adap);
540 	if (ret) {
541 		dev_warn(hdmi->dev, "cannot add %s I2C adapter\n", adap->name);
542 		devm_kfree(hdmi->dev, i2c);
543 		return ERR_PTR(ret);
544 	}
545 
546 	hdmi->i2c = i2c;
547 
548 	dev_info(hdmi->dev, "registered %s I2C bus driver\n", adap->name);
549 
550 	return adap;
551 }
552 
553 static void hdmi_set_cts_n(struct dw_hdmi *hdmi, unsigned int cts,
554 			   unsigned int n)
555 {
556 	/* Must be set/cleared first */
557 	hdmi_modb(hdmi, 0, HDMI_AUD_CTS3_CTS_MANUAL, HDMI_AUD_CTS3);
558 
559 	/* nshift factor = 0 */
560 	hdmi_modb(hdmi, 0, HDMI_AUD_CTS3_N_SHIFT_MASK, HDMI_AUD_CTS3);
561 
562 	/* Use automatic CTS generation mode when CTS is not set */
563 	if (cts)
564 		hdmi_writeb(hdmi, ((cts >> 16) &
565 				   HDMI_AUD_CTS3_AUDCTS19_16_MASK) |
566 				  HDMI_AUD_CTS3_CTS_MANUAL,
567 			    HDMI_AUD_CTS3);
568 	else
569 		hdmi_writeb(hdmi, 0, HDMI_AUD_CTS3);
570 	hdmi_writeb(hdmi, (cts >> 8) & 0xff, HDMI_AUD_CTS2);
571 	hdmi_writeb(hdmi, cts & 0xff, HDMI_AUD_CTS1);
572 
573 	hdmi_writeb(hdmi, (n >> 16) & 0x0f, HDMI_AUD_N3);
574 	hdmi_writeb(hdmi, (n >> 8) & 0xff, HDMI_AUD_N2);
575 	hdmi_writeb(hdmi, n & 0xff, HDMI_AUD_N1);
576 }
577 
578 static unsigned int hdmi_compute_n(unsigned int freq, unsigned long pixel_clk)
579 {
580 	unsigned int n = (128 * freq) / 1000;
581 	unsigned int mult = 1;
582 
583 	while (freq > 48000) {
584 		mult *= 2;
585 		freq /= 2;
586 	}
587 
588 	switch (freq) {
589 	case 32000:
590 		if (pixel_clk == 25175000)
591 			n = 4576;
592 		else if (pixel_clk == 27027000)
593 			n = 4096;
594 		else if (pixel_clk == 74176000 || pixel_clk == 148352000)
595 			n = 11648;
596 		else if (pixel_clk == 297000000)
597 			n = 3072;
598 		else
599 			n = 4096;
600 		n *= mult;
601 		break;
602 
603 	case 44100:
604 		if (pixel_clk == 25175000)
605 			n = 7007;
606 		else if (pixel_clk == 74176000)
607 			n = 17836;
608 		else if (pixel_clk == 148352000)
609 			n = 8918;
610 		else if (pixel_clk == 297000000)
611 			n = 4704;
612 		else
613 			n = 6272;
614 		n *= mult;
615 		break;
616 
617 	case 48000:
618 		if (pixel_clk == 25175000)
619 			n = 6864;
620 		else if (pixel_clk == 27027000)
621 			n = 6144;
622 		else if (pixel_clk == 74176000)
623 			n = 11648;
624 		else if (pixel_clk == 148352000)
625 			n = 5824;
626 		else if (pixel_clk == 297000000)
627 			n = 5120;
628 		else
629 			n = 6144;
630 		n *= mult;
631 		break;
632 
633 	default:
634 		break;
635 	}
636 
637 	return n;
638 }
639 
640 /*
641  * When transmitting IEC60958 linear PCM audio, these registers allow to
642  * configure the channel status information of all the channel status
643  * bits in the IEC60958 frame. For the moment this configuration is only
644  * used when the I2S audio interface, General Purpose Audio (GPA),
645  * or AHB audio DMA (AHBAUDDMA) interface is active
646  * (for S/PDIF interface this information comes from the stream).
647  */
648 void dw_hdmi_set_channel_status(struct dw_hdmi *hdmi,
649 				u8 *channel_status)
650 {
651 	/*
652 	 * Set channel status register for frequency and word length.
653 	 * Use default values for other registers.
654 	 */
655 	hdmi_writeb(hdmi, channel_status[3], HDMI_FC_AUDSCHNLS7);
656 	hdmi_writeb(hdmi, channel_status[4], HDMI_FC_AUDSCHNLS8);
657 }
658 EXPORT_SYMBOL_GPL(dw_hdmi_set_channel_status);
659 
660 static void hdmi_set_clk_regenerator(struct dw_hdmi *hdmi,
661 	unsigned long pixel_clk, unsigned int sample_rate)
662 {
663 	unsigned long ftdms = pixel_clk;
664 	unsigned int n, cts;
665 	u8 config3;
666 	u64 tmp;
667 
668 	n = hdmi_compute_n(sample_rate, pixel_clk);
669 
670 	config3 = hdmi_readb(hdmi, HDMI_CONFIG3_ID);
671 
672 	/* Compute CTS when using internal AHB audio or General Parallel audio*/
673 	if ((config3 & HDMI_CONFIG3_AHBAUDDMA) || (config3 & HDMI_CONFIG3_GPAUD)) {
674 		/*
675 		 * Compute the CTS value from the N value.  Note that CTS and N
676 		 * can be up to 20 bits in total, so we need 64-bit math.  Also
677 		 * note that our TDMS clock is not fully accurate; it is
678 		 * accurate to kHz.  This can introduce an unnecessary remainder
679 		 * in the calculation below, so we don't try to warn about that.
680 		 */
681 		tmp = (u64)ftdms * n;
682 		do_div(tmp, 128 * sample_rate);
683 		cts = tmp;
684 
685 		dev_dbg(hdmi->dev, "%s: fs=%uHz ftdms=%lu.%03luMHz N=%d cts=%d\n",
686 			__func__, sample_rate,
687 			ftdms / 1000000, (ftdms / 1000) % 1000,
688 			n, cts);
689 	} else {
690 		cts = 0;
691 	}
692 
693 	spin_lock_irq(&hdmi->audio_lock);
694 	hdmi->audio_n = n;
695 	hdmi->audio_cts = cts;
696 	hdmi_set_cts_n(hdmi, cts, hdmi->audio_enable ? n : 0);
697 	spin_unlock_irq(&hdmi->audio_lock);
698 }
699 
700 static void hdmi_init_clk_regenerator(struct dw_hdmi *hdmi)
701 {
702 	mutex_lock(&hdmi->audio_mutex);
703 	hdmi_set_clk_regenerator(hdmi, 74250000, hdmi->sample_rate);
704 	mutex_unlock(&hdmi->audio_mutex);
705 }
706 
707 static void hdmi_clk_regenerator_update_pixel_clock(struct dw_hdmi *hdmi)
708 {
709 	mutex_lock(&hdmi->audio_mutex);
710 	hdmi_set_clk_regenerator(hdmi, hdmi->hdmi_data.video_mode.mtmdsclock,
711 				 hdmi->sample_rate);
712 	mutex_unlock(&hdmi->audio_mutex);
713 }
714 
715 void dw_hdmi_set_sample_width(struct dw_hdmi *hdmi, unsigned int width)
716 {
717 	mutex_lock(&hdmi->audio_mutex);
718 	hdmi->sample_width = width;
719 	mutex_unlock(&hdmi->audio_mutex);
720 }
721 EXPORT_SYMBOL_GPL(dw_hdmi_set_sample_width);
722 
723 void dw_hdmi_set_sample_non_pcm(struct dw_hdmi *hdmi, unsigned int non_pcm)
724 {
725 	mutex_lock(&hdmi->audio_mutex);
726 	hdmi->sample_non_pcm = non_pcm;
727 	mutex_unlock(&hdmi->audio_mutex);
728 }
729 EXPORT_SYMBOL_GPL(dw_hdmi_set_sample_non_pcm);
730 
731 void dw_hdmi_set_sample_rate(struct dw_hdmi *hdmi, unsigned int rate)
732 {
733 	mutex_lock(&hdmi->audio_mutex);
734 	hdmi->sample_rate = rate;
735 	hdmi_set_clk_regenerator(hdmi, hdmi->hdmi_data.video_mode.mtmdsclock,
736 				 hdmi->sample_rate);
737 	mutex_unlock(&hdmi->audio_mutex);
738 }
739 EXPORT_SYMBOL_GPL(dw_hdmi_set_sample_rate);
740 
741 void dw_hdmi_set_channel_count(struct dw_hdmi *hdmi, unsigned int cnt)
742 {
743 	u8 layout;
744 
745 	mutex_lock(&hdmi->audio_mutex);
746 	hdmi->channels = cnt;
747 
748 	/*
749 	 * For >2 channel PCM audio, we need to select layout 1
750 	 * and set an appropriate channel map.
751 	 */
752 	if (cnt > 2)
753 		layout = HDMI_FC_AUDSCONF_AUD_PACKET_LAYOUT_LAYOUT1;
754 	else
755 		layout = HDMI_FC_AUDSCONF_AUD_PACKET_LAYOUT_LAYOUT0;
756 
757 	hdmi_modb(hdmi, layout, HDMI_FC_AUDSCONF_AUD_PACKET_LAYOUT_MASK,
758 		  HDMI_FC_AUDSCONF);
759 
760 	/* Set the audio infoframes channel count */
761 	hdmi_modb(hdmi, (cnt - 1) << HDMI_FC_AUDICONF0_CC_OFFSET,
762 		  HDMI_FC_AUDICONF0_CC_MASK, HDMI_FC_AUDICONF0);
763 
764 	mutex_unlock(&hdmi->audio_mutex);
765 }
766 EXPORT_SYMBOL_GPL(dw_hdmi_set_channel_count);
767 
768 void dw_hdmi_set_channel_allocation(struct dw_hdmi *hdmi, unsigned int ca)
769 {
770 	mutex_lock(&hdmi->audio_mutex);
771 
772 	hdmi_writeb(hdmi, ca, HDMI_FC_AUDICONF2);
773 
774 	mutex_unlock(&hdmi->audio_mutex);
775 }
776 EXPORT_SYMBOL_GPL(dw_hdmi_set_channel_allocation);
777 
778 static void hdmi_enable_audio_clk(struct dw_hdmi *hdmi, bool enable)
779 {
780 	if (enable)
781 		hdmi->mc_clkdis &= ~HDMI_MC_CLKDIS_AUDCLK_DISABLE;
782 	else
783 		hdmi->mc_clkdis |= HDMI_MC_CLKDIS_AUDCLK_DISABLE;
784 	hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS);
785 }
786 
787 static u8 *hdmi_audio_get_eld(struct dw_hdmi *hdmi)
788 {
789 	if (!hdmi->curr_conn)
790 		return NULL;
791 
792 	return hdmi->curr_conn->eld;
793 }
794 
795 static void dw_hdmi_gp_audio_enable(struct dw_hdmi *hdmi)
796 {
797 	const struct dw_hdmi_plat_data *pdata = hdmi->plat_data;
798 	int sample_freq = 0x2, org_sample_freq = 0xD;
799 	int ch_mask = BIT(hdmi->channels) - 1;
800 
801 	switch (hdmi->sample_rate) {
802 	case 32000:
803 		sample_freq = 0x03;
804 		org_sample_freq = 0x0C;
805 		break;
806 	case 44100:
807 		sample_freq = 0x00;
808 		org_sample_freq = 0x0F;
809 		break;
810 	case 48000:
811 		sample_freq = 0x02;
812 		org_sample_freq = 0x0D;
813 		break;
814 	case 88200:
815 		sample_freq = 0x08;
816 		org_sample_freq = 0x07;
817 		break;
818 	case 96000:
819 		sample_freq = 0x0A;
820 		org_sample_freq = 0x05;
821 		break;
822 	case 176400:
823 		sample_freq = 0x0C;
824 		org_sample_freq = 0x03;
825 		break;
826 	case 192000:
827 		sample_freq = 0x0E;
828 		org_sample_freq = 0x01;
829 		break;
830 	default:
831 		break;
832 	}
833 
834 	hdmi_set_cts_n(hdmi, hdmi->audio_cts, hdmi->audio_n);
835 	hdmi_enable_audio_clk(hdmi, true);
836 
837 	hdmi_writeb(hdmi, 0x1, HDMI_FC_AUDSCHNLS0);
838 	hdmi_writeb(hdmi, hdmi->channels, HDMI_FC_AUDSCHNLS2);
839 	hdmi_writeb(hdmi, 0x22, HDMI_FC_AUDSCHNLS3);
840 	hdmi_writeb(hdmi, 0x22, HDMI_FC_AUDSCHNLS4);
841 	hdmi_writeb(hdmi, 0x11, HDMI_FC_AUDSCHNLS5);
842 	hdmi_writeb(hdmi, 0x11, HDMI_FC_AUDSCHNLS6);
843 	hdmi_writeb(hdmi, (0x3 << 4) | sample_freq, HDMI_FC_AUDSCHNLS7);
844 	hdmi_writeb(hdmi, (org_sample_freq << 4) | 0xb, HDMI_FC_AUDSCHNLS8);
845 
846 	hdmi_writeb(hdmi, ch_mask, HDMI_GP_CONF1);
847 	hdmi_writeb(hdmi, 0x02, HDMI_GP_CONF2);
848 	hdmi_writeb(hdmi, 0x01, HDMI_GP_CONF0);
849 
850 	hdmi_modb(hdmi,  0x3, 0x3, HDMI_FC_DATAUTO3);
851 
852 	/* hbr */
853 	if (hdmi->sample_rate == 192000 && hdmi->channels == 8 &&
854 	    hdmi->sample_width == 32 && hdmi->sample_non_pcm)
855 		hdmi_modb(hdmi, 0x01, 0x01, HDMI_GP_CONF2);
856 
857 	if (pdata->enable_audio)
858 		pdata->enable_audio(hdmi,
859 					    hdmi->channels,
860 					    hdmi->sample_width,
861 					    hdmi->sample_rate,
862 					    hdmi->sample_non_pcm);
863 }
864 
865 static void dw_hdmi_gp_audio_disable(struct dw_hdmi *hdmi)
866 {
867 	const struct dw_hdmi_plat_data *pdata = hdmi->plat_data;
868 
869 	hdmi_set_cts_n(hdmi, hdmi->audio_cts, 0);
870 
871 	hdmi_modb(hdmi,  0, 0x3, HDMI_FC_DATAUTO3);
872 	if (pdata->disable_audio)
873 		pdata->disable_audio(hdmi);
874 
875 	hdmi_enable_audio_clk(hdmi, false);
876 }
877 
878 static void dw_hdmi_ahb_audio_enable(struct dw_hdmi *hdmi)
879 {
880 	hdmi_set_cts_n(hdmi, hdmi->audio_cts, hdmi->audio_n);
881 }
882 
883 static void dw_hdmi_ahb_audio_disable(struct dw_hdmi *hdmi)
884 {
885 	hdmi_set_cts_n(hdmi, hdmi->audio_cts, 0);
886 }
887 
888 static void dw_hdmi_i2s_audio_enable(struct dw_hdmi *hdmi)
889 {
890 	hdmi_set_cts_n(hdmi, hdmi->audio_cts, hdmi->audio_n);
891 	hdmi_enable_audio_clk(hdmi, true);
892 }
893 
894 static void dw_hdmi_i2s_audio_disable(struct dw_hdmi *hdmi)
895 {
896 	hdmi_enable_audio_clk(hdmi, false);
897 }
898 
899 void dw_hdmi_audio_enable(struct dw_hdmi *hdmi)
900 {
901 	unsigned long flags;
902 
903 	spin_lock_irqsave(&hdmi->audio_lock, flags);
904 	hdmi->audio_enable = true;
905 	if (hdmi->enable_audio)
906 		hdmi->enable_audio(hdmi);
907 	spin_unlock_irqrestore(&hdmi->audio_lock, flags);
908 }
909 EXPORT_SYMBOL_GPL(dw_hdmi_audio_enable);
910 
911 void dw_hdmi_audio_disable(struct dw_hdmi *hdmi)
912 {
913 	unsigned long flags;
914 
915 	spin_lock_irqsave(&hdmi->audio_lock, flags);
916 	hdmi->audio_enable = false;
917 	if (hdmi->disable_audio)
918 		hdmi->disable_audio(hdmi);
919 	spin_unlock_irqrestore(&hdmi->audio_lock, flags);
920 }
921 EXPORT_SYMBOL_GPL(dw_hdmi_audio_disable);
922 
923 static bool hdmi_bus_fmt_is_rgb(unsigned int bus_format)
924 {
925 	switch (bus_format) {
926 	case MEDIA_BUS_FMT_RGB888_1X24:
927 	case MEDIA_BUS_FMT_RGB101010_1X30:
928 	case MEDIA_BUS_FMT_RGB121212_1X36:
929 	case MEDIA_BUS_FMT_RGB161616_1X48:
930 		return true;
931 
932 	default:
933 		return false;
934 	}
935 }
936 
937 static bool hdmi_bus_fmt_is_yuv444(unsigned int bus_format)
938 {
939 	switch (bus_format) {
940 	case MEDIA_BUS_FMT_YUV8_1X24:
941 	case MEDIA_BUS_FMT_YUV10_1X30:
942 	case MEDIA_BUS_FMT_YUV12_1X36:
943 	case MEDIA_BUS_FMT_YUV16_1X48:
944 		return true;
945 
946 	default:
947 		return false;
948 	}
949 }
950 
951 static bool hdmi_bus_fmt_is_yuv422(unsigned int bus_format)
952 {
953 	switch (bus_format) {
954 	case MEDIA_BUS_FMT_UYVY8_1X16:
955 	case MEDIA_BUS_FMT_UYVY10_1X20:
956 	case MEDIA_BUS_FMT_UYVY12_1X24:
957 		return true;
958 
959 	default:
960 		return false;
961 	}
962 }
963 
964 static bool hdmi_bus_fmt_is_yuv420(unsigned int bus_format)
965 {
966 	switch (bus_format) {
967 	case MEDIA_BUS_FMT_UYYVYY8_0_5X24:
968 	case MEDIA_BUS_FMT_UYYVYY10_0_5X30:
969 	case MEDIA_BUS_FMT_UYYVYY12_0_5X36:
970 	case MEDIA_BUS_FMT_UYYVYY16_0_5X48:
971 		return true;
972 
973 	default:
974 		return false;
975 	}
976 }
977 
978 static int hdmi_bus_fmt_color_depth(unsigned int bus_format)
979 {
980 	switch (bus_format) {
981 	case MEDIA_BUS_FMT_RGB888_1X24:
982 	case MEDIA_BUS_FMT_YUV8_1X24:
983 	case MEDIA_BUS_FMT_UYVY8_1X16:
984 	case MEDIA_BUS_FMT_UYYVYY8_0_5X24:
985 		return 8;
986 
987 	case MEDIA_BUS_FMT_RGB101010_1X30:
988 	case MEDIA_BUS_FMT_YUV10_1X30:
989 	case MEDIA_BUS_FMT_UYVY10_1X20:
990 	case MEDIA_BUS_FMT_UYYVYY10_0_5X30:
991 		return 10;
992 
993 	case MEDIA_BUS_FMT_RGB121212_1X36:
994 	case MEDIA_BUS_FMT_YUV12_1X36:
995 	case MEDIA_BUS_FMT_UYVY12_1X24:
996 	case MEDIA_BUS_FMT_UYYVYY12_0_5X36:
997 		return 12;
998 
999 	case MEDIA_BUS_FMT_RGB161616_1X48:
1000 	case MEDIA_BUS_FMT_YUV16_1X48:
1001 	case MEDIA_BUS_FMT_UYYVYY16_0_5X48:
1002 		return 16;
1003 
1004 	default:
1005 		return 0;
1006 	}
1007 }
1008 
1009 /*
1010  * this submodule is responsible for the video data synchronization.
1011  * for example, for RGB 4:4:4 input, the data map is defined as
1012  *			pin{47~40} <==> R[7:0]
1013  *			pin{31~24} <==> G[7:0]
1014  *			pin{15~8}  <==> B[7:0]
1015  */
1016 static void hdmi_video_sample(struct dw_hdmi *hdmi)
1017 {
1018 	int color_format = 0;
1019 	u8 val;
1020 
1021 	switch (hdmi->hdmi_data.enc_in_bus_format) {
1022 	case MEDIA_BUS_FMT_RGB888_1X24:
1023 		color_format = 0x01;
1024 		break;
1025 	case MEDIA_BUS_FMT_RGB101010_1X30:
1026 		color_format = 0x03;
1027 		break;
1028 	case MEDIA_BUS_FMT_RGB121212_1X36:
1029 		color_format = 0x05;
1030 		break;
1031 	case MEDIA_BUS_FMT_RGB161616_1X48:
1032 		color_format = 0x07;
1033 		break;
1034 
1035 	case MEDIA_BUS_FMT_YUV8_1X24:
1036 	case MEDIA_BUS_FMT_UYYVYY8_0_5X24:
1037 		color_format = 0x09;
1038 		break;
1039 	case MEDIA_BUS_FMT_YUV10_1X30:
1040 	case MEDIA_BUS_FMT_UYYVYY10_0_5X30:
1041 		color_format = 0x0B;
1042 		break;
1043 	case MEDIA_BUS_FMT_YUV12_1X36:
1044 	case MEDIA_BUS_FMT_UYYVYY12_0_5X36:
1045 		color_format = 0x0D;
1046 		break;
1047 	case MEDIA_BUS_FMT_YUV16_1X48:
1048 	case MEDIA_BUS_FMT_UYYVYY16_0_5X48:
1049 		color_format = 0x0F;
1050 		break;
1051 
1052 	case MEDIA_BUS_FMT_UYVY8_1X16:
1053 		color_format = 0x16;
1054 		break;
1055 	case MEDIA_BUS_FMT_UYVY10_1X20:
1056 		color_format = 0x14;
1057 		break;
1058 	case MEDIA_BUS_FMT_UYVY12_1X24:
1059 		color_format = 0x12;
1060 		break;
1061 
1062 	default:
1063 		return;
1064 	}
1065 
1066 	val = HDMI_TX_INVID0_INTERNAL_DE_GENERATOR_DISABLE |
1067 		((color_format << HDMI_TX_INVID0_VIDEO_MAPPING_OFFSET) &
1068 		HDMI_TX_INVID0_VIDEO_MAPPING_MASK);
1069 	hdmi_writeb(hdmi, val, HDMI_TX_INVID0);
1070 
1071 	/* Enable TX stuffing: When DE is inactive, fix the output data to 0 */
1072 	val = HDMI_TX_INSTUFFING_BDBDATA_STUFFING_ENABLE |
1073 		HDMI_TX_INSTUFFING_RCRDATA_STUFFING_ENABLE |
1074 		HDMI_TX_INSTUFFING_GYDATA_STUFFING_ENABLE;
1075 	hdmi_writeb(hdmi, val, HDMI_TX_INSTUFFING);
1076 	hdmi_writeb(hdmi, 0x0, HDMI_TX_GYDATA0);
1077 	hdmi_writeb(hdmi, 0x0, HDMI_TX_GYDATA1);
1078 	hdmi_writeb(hdmi, 0x0, HDMI_TX_RCRDATA0);
1079 	hdmi_writeb(hdmi, 0x0, HDMI_TX_RCRDATA1);
1080 	hdmi_writeb(hdmi, 0x0, HDMI_TX_BCBDATA0);
1081 	hdmi_writeb(hdmi, 0x0, HDMI_TX_BCBDATA1);
1082 }
1083 
1084 static int is_color_space_conversion(struct dw_hdmi *hdmi)
1085 {
1086 	struct hdmi_data_info *hdmi_data = &hdmi->hdmi_data;
1087 	bool is_input_rgb, is_output_rgb;
1088 
1089 	is_input_rgb = hdmi_bus_fmt_is_rgb(hdmi_data->enc_in_bus_format);
1090 	is_output_rgb = hdmi_bus_fmt_is_rgb(hdmi_data->enc_out_bus_format);
1091 
1092 	return (is_input_rgb != is_output_rgb) ||
1093 	       (is_input_rgb && is_output_rgb && hdmi_data->rgb_limited_range);
1094 }
1095 
1096 static int is_color_space_decimation(struct dw_hdmi *hdmi)
1097 {
1098 	if (!hdmi_bus_fmt_is_yuv422(hdmi->hdmi_data.enc_out_bus_format))
1099 		return 0;
1100 
1101 	if (hdmi_bus_fmt_is_rgb(hdmi->hdmi_data.enc_in_bus_format) ||
1102 	    hdmi_bus_fmt_is_yuv444(hdmi->hdmi_data.enc_in_bus_format))
1103 		return 1;
1104 
1105 	return 0;
1106 }
1107 
1108 static int is_color_space_interpolation(struct dw_hdmi *hdmi)
1109 {
1110 	if (!hdmi_bus_fmt_is_yuv422(hdmi->hdmi_data.enc_in_bus_format))
1111 		return 0;
1112 
1113 	if (hdmi_bus_fmt_is_rgb(hdmi->hdmi_data.enc_out_bus_format) ||
1114 	    hdmi_bus_fmt_is_yuv444(hdmi->hdmi_data.enc_out_bus_format))
1115 		return 1;
1116 
1117 	return 0;
1118 }
1119 
1120 static bool is_csc_needed(struct dw_hdmi *hdmi)
1121 {
1122 	return is_color_space_conversion(hdmi) ||
1123 	       is_color_space_decimation(hdmi) ||
1124 	       is_color_space_interpolation(hdmi);
1125 }
1126 
1127 static void dw_hdmi_update_csc_coeffs(struct dw_hdmi *hdmi)
1128 {
1129 	const u16 (*csc_coeff)[3][4] = &csc_coeff_default;
1130 	bool is_input_rgb, is_output_rgb;
1131 	unsigned i;
1132 	u32 csc_scale = 1;
1133 
1134 	is_input_rgb = hdmi_bus_fmt_is_rgb(hdmi->hdmi_data.enc_in_bus_format);
1135 	is_output_rgb = hdmi_bus_fmt_is_rgb(hdmi->hdmi_data.enc_out_bus_format);
1136 
1137 	if (!is_input_rgb && is_output_rgb) {
1138 		if (hdmi->hdmi_data.enc_out_encoding == V4L2_YCBCR_ENC_601)
1139 			csc_coeff = &csc_coeff_rgb_out_eitu601;
1140 		else
1141 			csc_coeff = &csc_coeff_rgb_out_eitu709;
1142 	} else if (is_input_rgb && !is_output_rgb) {
1143 		if (hdmi->hdmi_data.enc_out_encoding == V4L2_YCBCR_ENC_601)
1144 			csc_coeff = &csc_coeff_rgb_in_eitu601;
1145 		else
1146 			csc_coeff = &csc_coeff_rgb_in_eitu709;
1147 		csc_scale = 0;
1148 	} else if (is_input_rgb && is_output_rgb &&
1149 		   hdmi->hdmi_data.rgb_limited_range) {
1150 		csc_coeff = &csc_coeff_rgb_full_to_rgb_limited;
1151 	}
1152 
1153 	/* The CSC registers are sequential, alternating MSB then LSB */
1154 	for (i = 0; i < ARRAY_SIZE(csc_coeff_default[0]); i++) {
1155 		u16 coeff_a = (*csc_coeff)[0][i];
1156 		u16 coeff_b = (*csc_coeff)[1][i];
1157 		u16 coeff_c = (*csc_coeff)[2][i];
1158 
1159 		hdmi_writeb(hdmi, coeff_a & 0xff, HDMI_CSC_COEF_A1_LSB + i * 2);
1160 		hdmi_writeb(hdmi, coeff_a >> 8, HDMI_CSC_COEF_A1_MSB + i * 2);
1161 		hdmi_writeb(hdmi, coeff_b & 0xff, HDMI_CSC_COEF_B1_LSB + i * 2);
1162 		hdmi_writeb(hdmi, coeff_b >> 8, HDMI_CSC_COEF_B1_MSB + i * 2);
1163 		hdmi_writeb(hdmi, coeff_c & 0xff, HDMI_CSC_COEF_C1_LSB + i * 2);
1164 		hdmi_writeb(hdmi, coeff_c >> 8, HDMI_CSC_COEF_C1_MSB + i * 2);
1165 	}
1166 
1167 	hdmi_modb(hdmi, csc_scale, HDMI_CSC_SCALE_CSCSCALE_MASK,
1168 		  HDMI_CSC_SCALE);
1169 }
1170 
1171 static void hdmi_video_csc(struct dw_hdmi *hdmi)
1172 {
1173 	int color_depth = 0;
1174 	int interpolation = HDMI_CSC_CFG_INTMODE_DISABLE;
1175 	int decimation = 0;
1176 
1177 	/* YCC422 interpolation to 444 mode */
1178 	if (is_color_space_interpolation(hdmi))
1179 		interpolation = HDMI_CSC_CFG_INTMODE_CHROMA_INT_FORMULA1;
1180 	else if (is_color_space_decimation(hdmi))
1181 		decimation = HDMI_CSC_CFG_DECMODE_CHROMA_INT_FORMULA3;
1182 
1183 	switch (hdmi_bus_fmt_color_depth(hdmi->hdmi_data.enc_out_bus_format)) {
1184 	case 8:
1185 		color_depth = HDMI_CSC_SCALE_CSC_COLORDE_PTH_24BPP;
1186 		break;
1187 	case 10:
1188 		color_depth = HDMI_CSC_SCALE_CSC_COLORDE_PTH_30BPP;
1189 		break;
1190 	case 12:
1191 		color_depth = HDMI_CSC_SCALE_CSC_COLORDE_PTH_36BPP;
1192 		break;
1193 	case 16:
1194 		color_depth = HDMI_CSC_SCALE_CSC_COLORDE_PTH_48BPP;
1195 		break;
1196 
1197 	default:
1198 		return;
1199 	}
1200 
1201 	/* Configure the CSC registers */
1202 	hdmi_writeb(hdmi, interpolation | decimation, HDMI_CSC_CFG);
1203 	hdmi_modb(hdmi, color_depth, HDMI_CSC_SCALE_CSC_COLORDE_PTH_MASK,
1204 		  HDMI_CSC_SCALE);
1205 
1206 	dw_hdmi_update_csc_coeffs(hdmi);
1207 }
1208 
1209 /*
1210  * HDMI video packetizer is used to packetize the data.
1211  * for example, if input is YCC422 mode or repeater is used,
1212  * data should be repacked this module can be bypassed.
1213  */
1214 static void hdmi_video_packetize(struct dw_hdmi *hdmi)
1215 {
1216 	unsigned int color_depth = 0;
1217 	unsigned int remap_size = HDMI_VP_REMAP_YCC422_16bit;
1218 	unsigned int output_select = HDMI_VP_CONF_OUTPUT_SELECTOR_PP;
1219 	struct hdmi_data_info *hdmi_data = &hdmi->hdmi_data;
1220 	u8 val, vp_conf;
1221 	u8 clear_gcp_auto = 0;
1222 
1223 
1224 	if (hdmi_bus_fmt_is_rgb(hdmi->hdmi_data.enc_out_bus_format) ||
1225 	    hdmi_bus_fmt_is_yuv444(hdmi->hdmi_data.enc_out_bus_format) ||
1226 	    hdmi_bus_fmt_is_yuv420(hdmi->hdmi_data.enc_out_bus_format)) {
1227 		switch (hdmi_bus_fmt_color_depth(
1228 					hdmi->hdmi_data.enc_out_bus_format)) {
1229 		case 8:
1230 			color_depth = 4;
1231 			output_select = HDMI_VP_CONF_OUTPUT_SELECTOR_BYPASS;
1232 			clear_gcp_auto = 1;
1233 			break;
1234 		case 10:
1235 			color_depth = 5;
1236 			break;
1237 		case 12:
1238 			color_depth = 6;
1239 			break;
1240 		case 16:
1241 			color_depth = 7;
1242 			break;
1243 		default:
1244 			output_select = HDMI_VP_CONF_OUTPUT_SELECTOR_BYPASS;
1245 		}
1246 	} else if (hdmi_bus_fmt_is_yuv422(hdmi->hdmi_data.enc_out_bus_format)) {
1247 		switch (hdmi_bus_fmt_color_depth(
1248 					hdmi->hdmi_data.enc_out_bus_format)) {
1249 		case 0:
1250 		case 8:
1251 			remap_size = HDMI_VP_REMAP_YCC422_16bit;
1252 			clear_gcp_auto = 1;
1253 			break;
1254 		case 10:
1255 			remap_size = HDMI_VP_REMAP_YCC422_20bit;
1256 			break;
1257 		case 12:
1258 			remap_size = HDMI_VP_REMAP_YCC422_24bit;
1259 			break;
1260 
1261 		default:
1262 			return;
1263 		}
1264 		output_select = HDMI_VP_CONF_OUTPUT_SELECTOR_YCC422;
1265 	} else {
1266 		return;
1267 	}
1268 
1269 	/* set the packetizer registers */
1270 	val = ((color_depth << HDMI_VP_PR_CD_COLOR_DEPTH_OFFSET) &
1271 		HDMI_VP_PR_CD_COLOR_DEPTH_MASK) |
1272 		((hdmi_data->pix_repet_factor <<
1273 		HDMI_VP_PR_CD_DESIRED_PR_FACTOR_OFFSET) &
1274 		HDMI_VP_PR_CD_DESIRED_PR_FACTOR_MASK);
1275 	hdmi_writeb(hdmi, val, HDMI_VP_PR_CD);
1276 
1277 	/* HDMI1.4b specification section 6.5.3:
1278 	 * Source shall only send GCPs with non-zero CD to sinks
1279 	 * that indicate support for Deep Color.
1280 	 * GCP only transmit CD and do not handle AVMUTE, PP norDefault_Phase (yet).
1281 	 * Disable Auto GCP when 24-bit color for sinks that not support Deep Color.
1282 	 */
1283 	val = hdmi_readb(hdmi, HDMI_FC_DATAUTO3);
1284 	if (clear_gcp_auto == 1)
1285 		val &= ~HDMI_FC_DATAUTO3_GCP_AUTO;
1286 	else
1287 		val |= HDMI_FC_DATAUTO3_GCP_AUTO;
1288 	hdmi_writeb(hdmi, val, HDMI_FC_DATAUTO3);
1289 
1290 	hdmi_modb(hdmi, HDMI_VP_STUFF_PR_STUFFING_STUFFING_MODE,
1291 		  HDMI_VP_STUFF_PR_STUFFING_MASK, HDMI_VP_STUFF);
1292 
1293 	/* Data from pixel repeater block */
1294 	if (hdmi_data->pix_repet_factor > 1) {
1295 		vp_conf = HDMI_VP_CONF_PR_EN_ENABLE |
1296 			  HDMI_VP_CONF_BYPASS_SELECT_PIX_REPEATER;
1297 	} else { /* data from packetizer block */
1298 		vp_conf = HDMI_VP_CONF_PR_EN_DISABLE |
1299 			  HDMI_VP_CONF_BYPASS_SELECT_VID_PACKETIZER;
1300 	}
1301 
1302 	hdmi_modb(hdmi, vp_conf,
1303 		  HDMI_VP_CONF_PR_EN_MASK |
1304 		  HDMI_VP_CONF_BYPASS_SELECT_MASK, HDMI_VP_CONF);
1305 
1306 	hdmi_modb(hdmi, 1 << HDMI_VP_STUFF_IDEFAULT_PHASE_OFFSET,
1307 		  HDMI_VP_STUFF_IDEFAULT_PHASE_MASK, HDMI_VP_STUFF);
1308 
1309 	hdmi_writeb(hdmi, remap_size, HDMI_VP_REMAP);
1310 
1311 	if (output_select == HDMI_VP_CONF_OUTPUT_SELECTOR_PP) {
1312 		vp_conf = HDMI_VP_CONF_BYPASS_EN_DISABLE |
1313 			  HDMI_VP_CONF_PP_EN_ENABLE |
1314 			  HDMI_VP_CONF_YCC422_EN_DISABLE;
1315 	} else if (output_select == HDMI_VP_CONF_OUTPUT_SELECTOR_YCC422) {
1316 		vp_conf = HDMI_VP_CONF_BYPASS_EN_DISABLE |
1317 			  HDMI_VP_CONF_PP_EN_DISABLE |
1318 			  HDMI_VP_CONF_YCC422_EN_ENABLE;
1319 	} else if (output_select == HDMI_VP_CONF_OUTPUT_SELECTOR_BYPASS) {
1320 		vp_conf = HDMI_VP_CONF_BYPASS_EN_ENABLE |
1321 			  HDMI_VP_CONF_PP_EN_DISABLE |
1322 			  HDMI_VP_CONF_YCC422_EN_DISABLE;
1323 	} else {
1324 		return;
1325 	}
1326 
1327 	hdmi_modb(hdmi, vp_conf,
1328 		  HDMI_VP_CONF_BYPASS_EN_MASK | HDMI_VP_CONF_PP_EN_ENMASK |
1329 		  HDMI_VP_CONF_YCC422_EN_MASK, HDMI_VP_CONF);
1330 
1331 	hdmi_modb(hdmi, HDMI_VP_STUFF_PP_STUFFING_STUFFING_MODE |
1332 			HDMI_VP_STUFF_YCC422_STUFFING_STUFFING_MODE,
1333 		  HDMI_VP_STUFF_PP_STUFFING_MASK |
1334 		  HDMI_VP_STUFF_YCC422_STUFFING_MASK, HDMI_VP_STUFF);
1335 
1336 	hdmi_modb(hdmi, output_select, HDMI_VP_CONF_OUTPUT_SELECTOR_MASK,
1337 		  HDMI_VP_CONF);
1338 }
1339 
1340 /* -----------------------------------------------------------------------------
1341  * Synopsys PHY Handling
1342  */
1343 
1344 static inline void hdmi_phy_test_clear(struct dw_hdmi *hdmi,
1345 				       unsigned char bit)
1346 {
1347 	hdmi_modb(hdmi, bit << HDMI_PHY_TST0_TSTCLR_OFFSET,
1348 		  HDMI_PHY_TST0_TSTCLR_MASK, HDMI_PHY_TST0);
1349 }
1350 
1351 static bool hdmi_phy_wait_i2c_done(struct dw_hdmi *hdmi, int msec)
1352 {
1353 	u32 val;
1354 
1355 	while ((val = hdmi_readb(hdmi, HDMI_IH_I2CMPHY_STAT0) & 0x3) == 0) {
1356 		if (msec-- == 0)
1357 			return false;
1358 		udelay(1000);
1359 	}
1360 	hdmi_writeb(hdmi, val, HDMI_IH_I2CMPHY_STAT0);
1361 
1362 	return true;
1363 }
1364 
1365 void dw_hdmi_phy_i2c_write(struct dw_hdmi *hdmi, unsigned short data,
1366 			   unsigned char addr)
1367 {
1368 	hdmi_writeb(hdmi, 0xFF, HDMI_IH_I2CMPHY_STAT0);
1369 	hdmi_writeb(hdmi, addr, HDMI_PHY_I2CM_ADDRESS_ADDR);
1370 	hdmi_writeb(hdmi, (unsigned char)(data >> 8),
1371 		    HDMI_PHY_I2CM_DATAO_1_ADDR);
1372 	hdmi_writeb(hdmi, (unsigned char)(data >> 0),
1373 		    HDMI_PHY_I2CM_DATAO_0_ADDR);
1374 	hdmi_writeb(hdmi, HDMI_PHY_I2CM_OPERATION_ADDR_WRITE,
1375 		    HDMI_PHY_I2CM_OPERATION_ADDR);
1376 	hdmi_phy_wait_i2c_done(hdmi, 1000);
1377 }
1378 EXPORT_SYMBOL_GPL(dw_hdmi_phy_i2c_write);
1379 
1380 /* Filter out invalid setups to avoid configuring SCDC and scrambling */
1381 static bool dw_hdmi_support_scdc(struct dw_hdmi *hdmi,
1382 				 const struct drm_display_info *display)
1383 {
1384 	/* Completely disable SCDC support for older controllers */
1385 	if (hdmi->version < 0x200a)
1386 		return false;
1387 
1388 	/* Disable if no DDC bus */
1389 	if (!hdmi->ddc)
1390 		return false;
1391 
1392 	/* Disable if SCDC is not supported, or if an HF-VSDB block is absent */
1393 	if (!display->hdmi.scdc.supported ||
1394 	    !display->hdmi.scdc.scrambling.supported)
1395 		return false;
1396 
1397 	/*
1398 	 * Disable if display only support low TMDS rates and scrambling
1399 	 * for low rates is not supported either
1400 	 */
1401 	if (!display->hdmi.scdc.scrambling.low_rates &&
1402 	    display->max_tmds_clock <= 340000)
1403 		return false;
1404 
1405 	return true;
1406 }
1407 
1408 /*
1409  * HDMI2.0 Specifies the following procedure for High TMDS Bit Rates:
1410  * - The Source shall suspend transmission of the TMDS clock and data
1411  * - The Source shall write to the TMDS_Bit_Clock_Ratio bit to change it
1412  * from a 0 to a 1 or from a 1 to a 0
1413  * - The Source shall allow a minimum of 1 ms and a maximum of 100 ms from
1414  * the time the TMDS_Bit_Clock_Ratio bit is written until resuming
1415  * transmission of TMDS clock and data
1416  *
1417  * To respect the 100ms maximum delay, the dw_hdmi_set_high_tmds_clock_ratio()
1418  * helper should called right before enabling the TMDS Clock and Data in
1419  * the PHY configuration callback.
1420  */
1421 void dw_hdmi_set_high_tmds_clock_ratio(struct dw_hdmi *hdmi,
1422 				       const struct drm_display_info *display)
1423 {
1424 	unsigned long mtmdsclock = hdmi->hdmi_data.video_mode.mtmdsclock;
1425 
1426 	/* Control for TMDS Bit Period/TMDS Clock-Period Ratio */
1427 	if (dw_hdmi_support_scdc(hdmi, display)) {
1428 		if (mtmdsclock > HDMI14_MAX_TMDSCLK)
1429 			drm_scdc_set_high_tmds_clock_ratio(hdmi->ddc, 1);
1430 		else
1431 			drm_scdc_set_high_tmds_clock_ratio(hdmi->ddc, 0);
1432 	}
1433 }
1434 EXPORT_SYMBOL_GPL(dw_hdmi_set_high_tmds_clock_ratio);
1435 
1436 static void dw_hdmi_phy_enable_powerdown(struct dw_hdmi *hdmi, bool enable)
1437 {
1438 	hdmi_mask_writeb(hdmi, !enable, HDMI_PHY_CONF0,
1439 			 HDMI_PHY_CONF0_PDZ_OFFSET,
1440 			 HDMI_PHY_CONF0_PDZ_MASK);
1441 }
1442 
1443 static void dw_hdmi_phy_enable_tmds(struct dw_hdmi *hdmi, u8 enable)
1444 {
1445 	hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
1446 			 HDMI_PHY_CONF0_ENTMDS_OFFSET,
1447 			 HDMI_PHY_CONF0_ENTMDS_MASK);
1448 }
1449 
1450 static void dw_hdmi_phy_enable_svsret(struct dw_hdmi *hdmi, u8 enable)
1451 {
1452 	hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
1453 			 HDMI_PHY_CONF0_SVSRET_OFFSET,
1454 			 HDMI_PHY_CONF0_SVSRET_MASK);
1455 }
1456 
1457 void dw_hdmi_phy_gen2_pddq(struct dw_hdmi *hdmi, u8 enable)
1458 {
1459 	hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
1460 			 HDMI_PHY_CONF0_GEN2_PDDQ_OFFSET,
1461 			 HDMI_PHY_CONF0_GEN2_PDDQ_MASK);
1462 }
1463 EXPORT_SYMBOL_GPL(dw_hdmi_phy_gen2_pddq);
1464 
1465 void dw_hdmi_phy_gen2_txpwron(struct dw_hdmi *hdmi, u8 enable)
1466 {
1467 	hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
1468 			 HDMI_PHY_CONF0_GEN2_TXPWRON_OFFSET,
1469 			 HDMI_PHY_CONF0_GEN2_TXPWRON_MASK);
1470 }
1471 EXPORT_SYMBOL_GPL(dw_hdmi_phy_gen2_txpwron);
1472 
1473 static void dw_hdmi_phy_sel_data_en_pol(struct dw_hdmi *hdmi, u8 enable)
1474 {
1475 	hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
1476 			 HDMI_PHY_CONF0_SELDATAENPOL_OFFSET,
1477 			 HDMI_PHY_CONF0_SELDATAENPOL_MASK);
1478 }
1479 
1480 static void dw_hdmi_phy_sel_interface_control(struct dw_hdmi *hdmi, u8 enable)
1481 {
1482 	hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
1483 			 HDMI_PHY_CONF0_SELDIPIF_OFFSET,
1484 			 HDMI_PHY_CONF0_SELDIPIF_MASK);
1485 }
1486 
1487 void dw_hdmi_phy_gen1_reset(struct dw_hdmi *hdmi)
1488 {
1489 	/* PHY reset. The reset signal is active low on Gen1 PHYs. */
1490 	hdmi_writeb(hdmi, 0, HDMI_MC_PHYRSTZ);
1491 	hdmi_writeb(hdmi, HDMI_MC_PHYRSTZ_PHYRSTZ, HDMI_MC_PHYRSTZ);
1492 }
1493 EXPORT_SYMBOL_GPL(dw_hdmi_phy_gen1_reset);
1494 
1495 void dw_hdmi_phy_gen2_reset(struct dw_hdmi *hdmi)
1496 {
1497 	/* PHY reset. The reset signal is active high on Gen2 PHYs. */
1498 	hdmi_writeb(hdmi, HDMI_MC_PHYRSTZ_PHYRSTZ, HDMI_MC_PHYRSTZ);
1499 	hdmi_writeb(hdmi, 0, HDMI_MC_PHYRSTZ);
1500 }
1501 EXPORT_SYMBOL_GPL(dw_hdmi_phy_gen2_reset);
1502 
1503 void dw_hdmi_phy_i2c_set_addr(struct dw_hdmi *hdmi, u8 address)
1504 {
1505 	hdmi_phy_test_clear(hdmi, 1);
1506 	hdmi_writeb(hdmi, address, HDMI_PHY_I2CM_SLAVE_ADDR);
1507 	hdmi_phy_test_clear(hdmi, 0);
1508 }
1509 EXPORT_SYMBOL_GPL(dw_hdmi_phy_i2c_set_addr);
1510 
1511 static void dw_hdmi_phy_power_off(struct dw_hdmi *hdmi)
1512 {
1513 	const struct dw_hdmi_phy_data *phy = hdmi->phy.data;
1514 	unsigned int i;
1515 	u16 val;
1516 
1517 	if (phy->gen == 1) {
1518 		dw_hdmi_phy_enable_tmds(hdmi, 0);
1519 		dw_hdmi_phy_enable_powerdown(hdmi, true);
1520 		return;
1521 	}
1522 
1523 	dw_hdmi_phy_gen2_txpwron(hdmi, 0);
1524 
1525 	/*
1526 	 * Wait for TX_PHY_LOCK to be deasserted to indicate that the PHY went
1527 	 * to low power mode.
1528 	 */
1529 	for (i = 0; i < 5; ++i) {
1530 		val = hdmi_readb(hdmi, HDMI_PHY_STAT0);
1531 		if (!(val & HDMI_PHY_TX_PHY_LOCK))
1532 			break;
1533 
1534 		usleep_range(1000, 2000);
1535 	}
1536 
1537 	if (val & HDMI_PHY_TX_PHY_LOCK)
1538 		dev_warn(hdmi->dev, "PHY failed to power down\n");
1539 	else
1540 		dev_dbg(hdmi->dev, "PHY powered down in %u iterations\n", i);
1541 
1542 	dw_hdmi_phy_gen2_pddq(hdmi, 1);
1543 }
1544 
1545 static int dw_hdmi_phy_power_on(struct dw_hdmi *hdmi)
1546 {
1547 	const struct dw_hdmi_phy_data *phy = hdmi->phy.data;
1548 	unsigned int i;
1549 	u8 val;
1550 
1551 	if (phy->gen == 1) {
1552 		dw_hdmi_phy_enable_powerdown(hdmi, false);
1553 
1554 		/* Toggle TMDS enable. */
1555 		dw_hdmi_phy_enable_tmds(hdmi, 0);
1556 		dw_hdmi_phy_enable_tmds(hdmi, 1);
1557 		return 0;
1558 	}
1559 
1560 	dw_hdmi_phy_gen2_txpwron(hdmi, 1);
1561 	dw_hdmi_phy_gen2_pddq(hdmi, 0);
1562 
1563 	/* Wait for PHY PLL lock */
1564 	for (i = 0; i < 5; ++i) {
1565 		val = hdmi_readb(hdmi, HDMI_PHY_STAT0) & HDMI_PHY_TX_PHY_LOCK;
1566 		if (val)
1567 			break;
1568 
1569 		usleep_range(1000, 2000);
1570 	}
1571 
1572 	if (!val) {
1573 		dev_err(hdmi->dev, "PHY PLL failed to lock\n");
1574 		return -ETIMEDOUT;
1575 	}
1576 
1577 	dev_dbg(hdmi->dev, "PHY PLL locked %u iterations\n", i);
1578 	return 0;
1579 }
1580 
1581 /*
1582  * PHY configuration function for the DWC HDMI 3D TX PHY. Based on the available
1583  * information the DWC MHL PHY has the same register layout and is thus also
1584  * supported by this function.
1585  */
1586 static int hdmi_phy_configure_dwc_hdmi_3d_tx(struct dw_hdmi *hdmi,
1587 		const struct dw_hdmi_plat_data *pdata,
1588 		unsigned long mpixelclock)
1589 {
1590 	const struct dw_hdmi_mpll_config *mpll_config = pdata->mpll_cfg;
1591 	const struct dw_hdmi_curr_ctrl *curr_ctrl = pdata->cur_ctr;
1592 	const struct dw_hdmi_phy_config *phy_config = pdata->phy_config;
1593 
1594 	/* TOFIX Will need 420 specific PHY configuration tables */
1595 
1596 	/* PLL/MPLL Cfg - always match on final entry */
1597 	for (; mpll_config->mpixelclock != ~0UL; mpll_config++)
1598 		if (mpixelclock <= mpll_config->mpixelclock)
1599 			break;
1600 
1601 	for (; curr_ctrl->mpixelclock != ~0UL; curr_ctrl++)
1602 		if (mpixelclock <= curr_ctrl->mpixelclock)
1603 			break;
1604 
1605 	for (; phy_config->mpixelclock != ~0UL; phy_config++)
1606 		if (mpixelclock <= phy_config->mpixelclock)
1607 			break;
1608 
1609 	if (mpll_config->mpixelclock == ~0UL ||
1610 	    curr_ctrl->mpixelclock == ~0UL ||
1611 	    phy_config->mpixelclock == ~0UL)
1612 		return -EINVAL;
1613 
1614 	dw_hdmi_phy_i2c_write(hdmi, mpll_config->res[0].cpce,
1615 			      HDMI_3D_TX_PHY_CPCE_CTRL);
1616 	dw_hdmi_phy_i2c_write(hdmi, mpll_config->res[0].gmp,
1617 			      HDMI_3D_TX_PHY_GMPCTRL);
1618 	dw_hdmi_phy_i2c_write(hdmi, curr_ctrl->curr[0],
1619 			      HDMI_3D_TX_PHY_CURRCTRL);
1620 
1621 	dw_hdmi_phy_i2c_write(hdmi, 0, HDMI_3D_TX_PHY_PLLPHBYCTRL);
1622 	dw_hdmi_phy_i2c_write(hdmi, HDMI_3D_TX_PHY_MSM_CTRL_CKO_SEL_FB_CLK,
1623 			      HDMI_3D_TX_PHY_MSM_CTRL);
1624 
1625 	dw_hdmi_phy_i2c_write(hdmi, phy_config->term, HDMI_3D_TX_PHY_TXTERM);
1626 	dw_hdmi_phy_i2c_write(hdmi, phy_config->sym_ctr,
1627 			      HDMI_3D_TX_PHY_CKSYMTXCTRL);
1628 	dw_hdmi_phy_i2c_write(hdmi, phy_config->vlev_ctr,
1629 			      HDMI_3D_TX_PHY_VLEVCTRL);
1630 
1631 	/* Override and disable clock termination. */
1632 	dw_hdmi_phy_i2c_write(hdmi, HDMI_3D_TX_PHY_CKCALCTRL_OVERRIDE,
1633 			      HDMI_3D_TX_PHY_CKCALCTRL);
1634 
1635 	return 0;
1636 }
1637 
1638 static int hdmi_phy_configure(struct dw_hdmi *hdmi,
1639 			      const struct drm_display_info *display)
1640 {
1641 	const struct dw_hdmi_phy_data *phy = hdmi->phy.data;
1642 	const struct dw_hdmi_plat_data *pdata = hdmi->plat_data;
1643 	unsigned long mpixelclock = hdmi->hdmi_data.video_mode.mpixelclock;
1644 	unsigned long mtmdsclock = hdmi->hdmi_data.video_mode.mtmdsclock;
1645 	int ret;
1646 
1647 	dw_hdmi_phy_power_off(hdmi);
1648 
1649 	dw_hdmi_set_high_tmds_clock_ratio(hdmi, display);
1650 
1651 	/* Leave low power consumption mode by asserting SVSRET. */
1652 	if (phy->has_svsret)
1653 		dw_hdmi_phy_enable_svsret(hdmi, 1);
1654 
1655 	dw_hdmi_phy_gen2_reset(hdmi);
1656 
1657 	hdmi_writeb(hdmi, HDMI_MC_HEACPHY_RST_ASSERT, HDMI_MC_HEACPHY_RST);
1658 
1659 	dw_hdmi_phy_i2c_set_addr(hdmi, HDMI_PHY_I2CM_SLAVE_ADDR_PHY_GEN2);
1660 
1661 	/* Write to the PHY as configured by the platform */
1662 	if (pdata->configure_phy)
1663 		ret = pdata->configure_phy(hdmi, pdata->priv_data, mpixelclock);
1664 	else
1665 		ret = phy->configure(hdmi, pdata, mpixelclock);
1666 	if (ret) {
1667 		dev_err(hdmi->dev, "PHY configuration failed (clock %lu)\n",
1668 			mpixelclock);
1669 		return ret;
1670 	}
1671 
1672 	/* Wait for resuming transmission of TMDS clock and data */
1673 	if (mtmdsclock > HDMI14_MAX_TMDSCLK)
1674 		msleep(100);
1675 
1676 	return dw_hdmi_phy_power_on(hdmi);
1677 }
1678 
1679 static int dw_hdmi_phy_init(struct dw_hdmi *hdmi, void *data,
1680 			    const struct drm_display_info *display,
1681 			    const struct drm_display_mode *mode)
1682 {
1683 	int i, ret;
1684 
1685 	/* HDMI Phy spec says to do the phy initialization sequence twice */
1686 	for (i = 0; i < 2; i++) {
1687 		dw_hdmi_phy_sel_data_en_pol(hdmi, 1);
1688 		dw_hdmi_phy_sel_interface_control(hdmi, 0);
1689 
1690 		ret = hdmi_phy_configure(hdmi, display);
1691 		if (ret)
1692 			return ret;
1693 	}
1694 
1695 	return 0;
1696 }
1697 
1698 static void dw_hdmi_phy_disable(struct dw_hdmi *hdmi, void *data)
1699 {
1700 	dw_hdmi_phy_power_off(hdmi);
1701 }
1702 
1703 enum drm_connector_status dw_hdmi_phy_read_hpd(struct dw_hdmi *hdmi,
1704 					       void *data)
1705 {
1706 	return hdmi_readb(hdmi, HDMI_PHY_STAT0) & HDMI_PHY_HPD ?
1707 		connector_status_connected : connector_status_disconnected;
1708 }
1709 EXPORT_SYMBOL_GPL(dw_hdmi_phy_read_hpd);
1710 
1711 void dw_hdmi_phy_update_hpd(struct dw_hdmi *hdmi, void *data,
1712 			    bool force, bool disabled, bool rxsense)
1713 {
1714 	u8 old_mask = hdmi->phy_mask;
1715 
1716 	if (force || disabled || !rxsense)
1717 		hdmi->phy_mask |= HDMI_PHY_RX_SENSE;
1718 	else
1719 		hdmi->phy_mask &= ~HDMI_PHY_RX_SENSE;
1720 
1721 	if (old_mask != hdmi->phy_mask)
1722 		hdmi_writeb(hdmi, hdmi->phy_mask, HDMI_PHY_MASK0);
1723 }
1724 EXPORT_SYMBOL_GPL(dw_hdmi_phy_update_hpd);
1725 
1726 void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data)
1727 {
1728 	/*
1729 	 * Configure the PHY RX SENSE and HPD interrupts polarities and clear
1730 	 * any pending interrupt.
1731 	 */
1732 	hdmi_writeb(hdmi, HDMI_PHY_HPD | HDMI_PHY_RX_SENSE, HDMI_PHY_POL0);
1733 	hdmi_writeb(hdmi, HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE,
1734 		    HDMI_IH_PHY_STAT0);
1735 
1736 	/* Enable cable hot plug irq. */
1737 	hdmi_writeb(hdmi, hdmi->phy_mask, HDMI_PHY_MASK0);
1738 
1739 	/* Clear and unmute interrupts. */
1740 	hdmi_writeb(hdmi, HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE,
1741 		    HDMI_IH_PHY_STAT0);
1742 	hdmi_writeb(hdmi, ~(HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE),
1743 		    HDMI_IH_MUTE_PHY_STAT0);
1744 }
1745 EXPORT_SYMBOL_GPL(dw_hdmi_phy_setup_hpd);
1746 
1747 static const struct dw_hdmi_phy_ops dw_hdmi_synopsys_phy_ops = {
1748 	.init = dw_hdmi_phy_init,
1749 	.disable = dw_hdmi_phy_disable,
1750 	.read_hpd = dw_hdmi_phy_read_hpd,
1751 	.update_hpd = dw_hdmi_phy_update_hpd,
1752 	.setup_hpd = dw_hdmi_phy_setup_hpd,
1753 };
1754 
1755 /* -----------------------------------------------------------------------------
1756  * HDMI TX Setup
1757  */
1758 
1759 static void hdmi_tx_hdcp_config(struct dw_hdmi *hdmi)
1760 {
1761 	u8 de;
1762 
1763 	if (hdmi->hdmi_data.video_mode.mdataenablepolarity)
1764 		de = HDMI_A_VIDPOLCFG_DATAENPOL_ACTIVE_HIGH;
1765 	else
1766 		de = HDMI_A_VIDPOLCFG_DATAENPOL_ACTIVE_LOW;
1767 
1768 	/* disable rx detect */
1769 	hdmi_modb(hdmi, HDMI_A_HDCPCFG0_RXDETECT_DISABLE,
1770 		  HDMI_A_HDCPCFG0_RXDETECT_MASK, HDMI_A_HDCPCFG0);
1771 
1772 	hdmi_modb(hdmi, de, HDMI_A_VIDPOLCFG_DATAENPOL_MASK, HDMI_A_VIDPOLCFG);
1773 
1774 	hdmi_modb(hdmi, HDMI_A_HDCPCFG1_ENCRYPTIONDISABLE_DISABLE,
1775 		  HDMI_A_HDCPCFG1_ENCRYPTIONDISABLE_MASK, HDMI_A_HDCPCFG1);
1776 }
1777 
1778 static void hdmi_config_AVI(struct dw_hdmi *hdmi,
1779 			    const struct drm_connector *connector,
1780 			    const struct drm_display_mode *mode)
1781 {
1782 	struct hdmi_avi_infoframe frame;
1783 	u8 val;
1784 
1785 	/* Initialise info frame from DRM mode */
1786 	drm_hdmi_avi_infoframe_from_display_mode(&frame, connector, mode);
1787 
1788 	if (hdmi_bus_fmt_is_rgb(hdmi->hdmi_data.enc_out_bus_format)) {
1789 		drm_hdmi_avi_infoframe_quant_range(&frame, connector, mode,
1790 						   hdmi->hdmi_data.rgb_limited_range ?
1791 						   HDMI_QUANTIZATION_RANGE_LIMITED :
1792 						   HDMI_QUANTIZATION_RANGE_FULL);
1793 	} else {
1794 		frame.quantization_range = HDMI_QUANTIZATION_RANGE_DEFAULT;
1795 		frame.ycc_quantization_range =
1796 			HDMI_YCC_QUANTIZATION_RANGE_LIMITED;
1797 	}
1798 
1799 	if (hdmi_bus_fmt_is_yuv444(hdmi->hdmi_data.enc_out_bus_format))
1800 		frame.colorspace = HDMI_COLORSPACE_YUV444;
1801 	else if (hdmi_bus_fmt_is_yuv422(hdmi->hdmi_data.enc_out_bus_format))
1802 		frame.colorspace = HDMI_COLORSPACE_YUV422;
1803 	else if (hdmi_bus_fmt_is_yuv420(hdmi->hdmi_data.enc_out_bus_format))
1804 		frame.colorspace = HDMI_COLORSPACE_YUV420;
1805 	else
1806 		frame.colorspace = HDMI_COLORSPACE_RGB;
1807 
1808 	/* Set up colorimetry */
1809 	if (!hdmi_bus_fmt_is_rgb(hdmi->hdmi_data.enc_out_bus_format)) {
1810 		switch (hdmi->hdmi_data.enc_out_encoding) {
1811 		case V4L2_YCBCR_ENC_601:
1812 			if (hdmi->hdmi_data.enc_in_encoding == V4L2_YCBCR_ENC_XV601)
1813 				frame.colorimetry = HDMI_COLORIMETRY_EXTENDED;
1814 			else
1815 				frame.colorimetry = HDMI_COLORIMETRY_ITU_601;
1816 			frame.extended_colorimetry =
1817 					HDMI_EXTENDED_COLORIMETRY_XV_YCC_601;
1818 			break;
1819 		case V4L2_YCBCR_ENC_709:
1820 			if (hdmi->hdmi_data.enc_in_encoding == V4L2_YCBCR_ENC_XV709)
1821 				frame.colorimetry = HDMI_COLORIMETRY_EXTENDED;
1822 			else
1823 				frame.colorimetry = HDMI_COLORIMETRY_ITU_709;
1824 			frame.extended_colorimetry =
1825 					HDMI_EXTENDED_COLORIMETRY_XV_YCC_709;
1826 			break;
1827 		default: /* Carries no data */
1828 			frame.colorimetry = HDMI_COLORIMETRY_ITU_601;
1829 			frame.extended_colorimetry =
1830 					HDMI_EXTENDED_COLORIMETRY_XV_YCC_601;
1831 			break;
1832 		}
1833 	} else {
1834 		frame.colorimetry = HDMI_COLORIMETRY_NONE;
1835 		frame.extended_colorimetry =
1836 			HDMI_EXTENDED_COLORIMETRY_XV_YCC_601;
1837 	}
1838 
1839 	/*
1840 	 * The Designware IP uses a different byte format from standard
1841 	 * AVI info frames, though generally the bits are in the correct
1842 	 * bytes.
1843 	 */
1844 
1845 	/*
1846 	 * AVI data byte 1 differences: Colorspace in bits 0,1 rather than 5,6,
1847 	 * scan info in bits 4,5 rather than 0,1 and active aspect present in
1848 	 * bit 6 rather than 4.
1849 	 */
1850 	val = (frame.scan_mode & 3) << 4 | (frame.colorspace & 3);
1851 	if (frame.active_aspect & 15)
1852 		val |= HDMI_FC_AVICONF0_ACTIVE_FMT_INFO_PRESENT;
1853 	if (frame.top_bar || frame.bottom_bar)
1854 		val |= HDMI_FC_AVICONF0_BAR_DATA_HORIZ_BAR;
1855 	if (frame.left_bar || frame.right_bar)
1856 		val |= HDMI_FC_AVICONF0_BAR_DATA_VERT_BAR;
1857 	hdmi_writeb(hdmi, val, HDMI_FC_AVICONF0);
1858 
1859 	/* AVI data byte 2 differences: none */
1860 	val = ((frame.colorimetry & 0x3) << 6) |
1861 	      ((frame.picture_aspect & 0x3) << 4) |
1862 	      (frame.active_aspect & 0xf);
1863 	hdmi_writeb(hdmi, val, HDMI_FC_AVICONF1);
1864 
1865 	/* AVI data byte 3 differences: none */
1866 	val = ((frame.extended_colorimetry & 0x7) << 4) |
1867 	      ((frame.quantization_range & 0x3) << 2) |
1868 	      (frame.nups & 0x3);
1869 	if (frame.itc)
1870 		val |= HDMI_FC_AVICONF2_IT_CONTENT_VALID;
1871 	hdmi_writeb(hdmi, val, HDMI_FC_AVICONF2);
1872 
1873 	/* AVI data byte 4 differences: none */
1874 	val = frame.video_code & 0x7f;
1875 	hdmi_writeb(hdmi, val, HDMI_FC_AVIVID);
1876 
1877 	/* AVI Data Byte 5- set up input and output pixel repetition */
1878 	val = (((hdmi->hdmi_data.video_mode.mpixelrepetitioninput + 1) <<
1879 		HDMI_FC_PRCONF_INCOMING_PR_FACTOR_OFFSET) &
1880 		HDMI_FC_PRCONF_INCOMING_PR_FACTOR_MASK) |
1881 		((hdmi->hdmi_data.video_mode.mpixelrepetitionoutput <<
1882 		HDMI_FC_PRCONF_OUTPUT_PR_FACTOR_OFFSET) &
1883 		HDMI_FC_PRCONF_OUTPUT_PR_FACTOR_MASK);
1884 	hdmi_writeb(hdmi, val, HDMI_FC_PRCONF);
1885 
1886 	/*
1887 	 * AVI data byte 5 differences: content type in 0,1 rather than 4,5,
1888 	 * ycc range in bits 2,3 rather than 6,7
1889 	 */
1890 	val = ((frame.ycc_quantization_range & 0x3) << 2) |
1891 	      (frame.content_type & 0x3);
1892 	hdmi_writeb(hdmi, val, HDMI_FC_AVICONF3);
1893 
1894 	/* AVI Data Bytes 6-13 */
1895 	hdmi_writeb(hdmi, frame.top_bar & 0xff, HDMI_FC_AVIETB0);
1896 	hdmi_writeb(hdmi, (frame.top_bar >> 8) & 0xff, HDMI_FC_AVIETB1);
1897 	hdmi_writeb(hdmi, frame.bottom_bar & 0xff, HDMI_FC_AVISBB0);
1898 	hdmi_writeb(hdmi, (frame.bottom_bar >> 8) & 0xff, HDMI_FC_AVISBB1);
1899 	hdmi_writeb(hdmi, frame.left_bar & 0xff, HDMI_FC_AVIELB0);
1900 	hdmi_writeb(hdmi, (frame.left_bar >> 8) & 0xff, HDMI_FC_AVIELB1);
1901 	hdmi_writeb(hdmi, frame.right_bar & 0xff, HDMI_FC_AVISRB0);
1902 	hdmi_writeb(hdmi, (frame.right_bar >> 8) & 0xff, HDMI_FC_AVISRB1);
1903 }
1904 
1905 static void hdmi_config_vendor_specific_infoframe(struct dw_hdmi *hdmi,
1906 						  const struct drm_connector *connector,
1907 						  const struct drm_display_mode *mode)
1908 {
1909 	struct hdmi_vendor_infoframe frame;
1910 	u8 buffer[10];
1911 	ssize_t err;
1912 
1913 	err = drm_hdmi_vendor_infoframe_from_display_mode(&frame, connector,
1914 							  mode);
1915 	if (err < 0)
1916 		/*
1917 		 * Going into that statement does not means vendor infoframe
1918 		 * fails. It just informed us that vendor infoframe is not
1919 		 * needed for the selected mode. Only 4k or stereoscopic 3D
1920 		 * mode requires vendor infoframe. So just simply return.
1921 		 */
1922 		return;
1923 
1924 	err = hdmi_vendor_infoframe_pack(&frame, buffer, sizeof(buffer));
1925 	if (err < 0) {
1926 		dev_err(hdmi->dev, "Failed to pack vendor infoframe: %zd\n",
1927 			err);
1928 		return;
1929 	}
1930 	hdmi_mask_writeb(hdmi, 0, HDMI_FC_DATAUTO0, HDMI_FC_DATAUTO0_VSD_OFFSET,
1931 			HDMI_FC_DATAUTO0_VSD_MASK);
1932 
1933 	/* Set the length of HDMI vendor specific InfoFrame payload */
1934 	hdmi_writeb(hdmi, buffer[2], HDMI_FC_VSDSIZE);
1935 
1936 	/* Set 24bit IEEE Registration Identifier */
1937 	hdmi_writeb(hdmi, buffer[4], HDMI_FC_VSDIEEEID0);
1938 	hdmi_writeb(hdmi, buffer[5], HDMI_FC_VSDIEEEID1);
1939 	hdmi_writeb(hdmi, buffer[6], HDMI_FC_VSDIEEEID2);
1940 
1941 	/* Set HDMI_Video_Format and HDMI_VIC/3D_Structure */
1942 	hdmi_writeb(hdmi, buffer[7], HDMI_FC_VSDPAYLOAD0);
1943 	hdmi_writeb(hdmi, buffer[8], HDMI_FC_VSDPAYLOAD1);
1944 
1945 	if (frame.s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF)
1946 		hdmi_writeb(hdmi, buffer[9], HDMI_FC_VSDPAYLOAD2);
1947 
1948 	/* Packet frame interpolation */
1949 	hdmi_writeb(hdmi, 1, HDMI_FC_DATAUTO1);
1950 
1951 	/* Auto packets per frame and line spacing */
1952 	hdmi_writeb(hdmi, 0x11, HDMI_FC_DATAUTO2);
1953 
1954 	/* Configures the Frame Composer On RDRB mode */
1955 	hdmi_mask_writeb(hdmi, 1, HDMI_FC_DATAUTO0, HDMI_FC_DATAUTO0_VSD_OFFSET,
1956 			HDMI_FC_DATAUTO0_VSD_MASK);
1957 }
1958 
1959 static void hdmi_config_drm_infoframe(struct dw_hdmi *hdmi,
1960 				      const struct drm_connector *connector)
1961 {
1962 	const struct drm_connector_state *conn_state = connector->state;
1963 	struct hdmi_drm_infoframe frame;
1964 	u8 buffer[30];
1965 	ssize_t err;
1966 	int i;
1967 
1968 	if (!hdmi->plat_data->use_drm_infoframe)
1969 		return;
1970 
1971 	hdmi_modb(hdmi, HDMI_FC_PACKET_TX_EN_DRM_DISABLE,
1972 		  HDMI_FC_PACKET_TX_EN_DRM_MASK, HDMI_FC_PACKET_TX_EN);
1973 
1974 	err = drm_hdmi_infoframe_set_hdr_metadata(&frame, conn_state);
1975 	if (err < 0)
1976 		return;
1977 
1978 	err = hdmi_drm_infoframe_pack(&frame, buffer, sizeof(buffer));
1979 	if (err < 0) {
1980 		dev_err(hdmi->dev, "Failed to pack drm infoframe: %zd\n", err);
1981 		return;
1982 	}
1983 
1984 	hdmi_writeb(hdmi, frame.version, HDMI_FC_DRM_HB0);
1985 	hdmi_writeb(hdmi, frame.length, HDMI_FC_DRM_HB1);
1986 
1987 	for (i = 0; i < frame.length; i++)
1988 		hdmi_writeb(hdmi, buffer[4 + i], HDMI_FC_DRM_PB0 + i);
1989 
1990 	hdmi_writeb(hdmi, 1, HDMI_FC_DRM_UP);
1991 	hdmi_modb(hdmi, HDMI_FC_PACKET_TX_EN_DRM_ENABLE,
1992 		  HDMI_FC_PACKET_TX_EN_DRM_MASK, HDMI_FC_PACKET_TX_EN);
1993 }
1994 
1995 static void hdmi_av_composer(struct dw_hdmi *hdmi,
1996 			     const struct drm_display_info *display,
1997 			     const struct drm_display_mode *mode)
1998 {
1999 	u8 inv_val, bytes;
2000 	const struct drm_hdmi_info *hdmi_info = &display->hdmi;
2001 	struct hdmi_vmode *vmode = &hdmi->hdmi_data.video_mode;
2002 	int hblank, vblank, h_de_hs, v_de_vs, hsync_len, vsync_len;
2003 	unsigned int vdisplay, hdisplay;
2004 
2005 	vmode->mpixelclock = mode->clock * 1000;
2006 
2007 	dev_dbg(hdmi->dev, "final pixclk = %d\n", vmode->mpixelclock);
2008 
2009 	vmode->mtmdsclock = vmode->mpixelclock;
2010 
2011 	if (!hdmi_bus_fmt_is_yuv422(hdmi->hdmi_data.enc_out_bus_format)) {
2012 		switch (hdmi_bus_fmt_color_depth(
2013 				hdmi->hdmi_data.enc_out_bus_format)) {
2014 		case 16:
2015 			vmode->mtmdsclock = vmode->mpixelclock * 2;
2016 			break;
2017 		case 12:
2018 			vmode->mtmdsclock = vmode->mpixelclock * 3 / 2;
2019 			break;
2020 		case 10:
2021 			vmode->mtmdsclock = vmode->mpixelclock * 5 / 4;
2022 			break;
2023 		}
2024 	}
2025 
2026 	if (hdmi_bus_fmt_is_yuv420(hdmi->hdmi_data.enc_out_bus_format))
2027 		vmode->mtmdsclock /= 2;
2028 
2029 	dev_dbg(hdmi->dev, "final tmdsclock = %d\n", vmode->mtmdsclock);
2030 
2031 	/* Set up HDMI_FC_INVIDCONF */
2032 	inv_val = (hdmi->hdmi_data.hdcp_enable ||
2033 		   (dw_hdmi_support_scdc(hdmi, display) &&
2034 		    (vmode->mtmdsclock > HDMI14_MAX_TMDSCLK ||
2035 		     hdmi_info->scdc.scrambling.low_rates)) ?
2036 		HDMI_FC_INVIDCONF_HDCP_KEEPOUT_ACTIVE :
2037 		HDMI_FC_INVIDCONF_HDCP_KEEPOUT_INACTIVE);
2038 
2039 	inv_val |= mode->flags & DRM_MODE_FLAG_PVSYNC ?
2040 		HDMI_FC_INVIDCONF_VSYNC_IN_POLARITY_ACTIVE_HIGH :
2041 		HDMI_FC_INVIDCONF_VSYNC_IN_POLARITY_ACTIVE_LOW;
2042 
2043 	inv_val |= mode->flags & DRM_MODE_FLAG_PHSYNC ?
2044 		HDMI_FC_INVIDCONF_HSYNC_IN_POLARITY_ACTIVE_HIGH :
2045 		HDMI_FC_INVIDCONF_HSYNC_IN_POLARITY_ACTIVE_LOW;
2046 
2047 	inv_val |= (vmode->mdataenablepolarity ?
2048 		HDMI_FC_INVIDCONF_DE_IN_POLARITY_ACTIVE_HIGH :
2049 		HDMI_FC_INVIDCONF_DE_IN_POLARITY_ACTIVE_LOW);
2050 
2051 	if (hdmi->vic == 39)
2052 		inv_val |= HDMI_FC_INVIDCONF_R_V_BLANK_IN_OSC_ACTIVE_HIGH;
2053 	else
2054 		inv_val |= mode->flags & DRM_MODE_FLAG_INTERLACE ?
2055 			HDMI_FC_INVIDCONF_R_V_BLANK_IN_OSC_ACTIVE_HIGH :
2056 			HDMI_FC_INVIDCONF_R_V_BLANK_IN_OSC_ACTIVE_LOW;
2057 
2058 	inv_val |= mode->flags & DRM_MODE_FLAG_INTERLACE ?
2059 		HDMI_FC_INVIDCONF_IN_I_P_INTERLACED :
2060 		HDMI_FC_INVIDCONF_IN_I_P_PROGRESSIVE;
2061 
2062 	inv_val |= hdmi->sink_is_hdmi ?
2063 		HDMI_FC_INVIDCONF_DVI_MODEZ_HDMI_MODE :
2064 		HDMI_FC_INVIDCONF_DVI_MODEZ_DVI_MODE;
2065 
2066 	hdmi_writeb(hdmi, inv_val, HDMI_FC_INVIDCONF);
2067 
2068 	hdisplay = mode->hdisplay;
2069 	hblank = mode->htotal - mode->hdisplay;
2070 	h_de_hs = mode->hsync_start - mode->hdisplay;
2071 	hsync_len = mode->hsync_end - mode->hsync_start;
2072 
2073 	/*
2074 	 * When we're setting a YCbCr420 mode, we need
2075 	 * to adjust the horizontal timing to suit.
2076 	 */
2077 	if (hdmi_bus_fmt_is_yuv420(hdmi->hdmi_data.enc_out_bus_format)) {
2078 		hdisplay /= 2;
2079 		hblank /= 2;
2080 		h_de_hs /= 2;
2081 		hsync_len /= 2;
2082 	}
2083 
2084 	vdisplay = mode->vdisplay;
2085 	vblank = mode->vtotal - mode->vdisplay;
2086 	v_de_vs = mode->vsync_start - mode->vdisplay;
2087 	vsync_len = mode->vsync_end - mode->vsync_start;
2088 
2089 	/*
2090 	 * When we're setting an interlaced mode, we need
2091 	 * to adjust the vertical timing to suit.
2092 	 */
2093 	if (mode->flags & DRM_MODE_FLAG_INTERLACE) {
2094 		vdisplay /= 2;
2095 		vblank /= 2;
2096 		v_de_vs /= 2;
2097 		vsync_len /= 2;
2098 	}
2099 
2100 	/* Scrambling Control */
2101 	if (dw_hdmi_support_scdc(hdmi, display)) {
2102 		if (vmode->mtmdsclock > HDMI14_MAX_TMDSCLK ||
2103 		    hdmi_info->scdc.scrambling.low_rates) {
2104 			/*
2105 			 * HDMI2.0 Specifies the following procedure:
2106 			 * After the Source Device has determined that
2107 			 * SCDC_Present is set (=1), the Source Device should
2108 			 * write the accurate Version of the Source Device
2109 			 * to the Source Version field in the SCDCS.
2110 			 * Source Devices compliant shall set the
2111 			 * Source Version = 1.
2112 			 */
2113 			drm_scdc_readb(hdmi->ddc, SCDC_SINK_VERSION,
2114 				       &bytes);
2115 			drm_scdc_writeb(hdmi->ddc, SCDC_SOURCE_VERSION,
2116 				min_t(u8, bytes, SCDC_MIN_SOURCE_VERSION));
2117 
2118 			/* Enabled Scrambling in the Sink */
2119 			drm_scdc_set_scrambling(hdmi->ddc, 1);
2120 
2121 			/*
2122 			 * To activate the scrambler feature, you must ensure
2123 			 * that the quasi-static configuration bit
2124 			 * fc_invidconf.HDCP_keepout is set at configuration
2125 			 * time, before the required mc_swrstzreq.tmdsswrst_req
2126 			 * reset request is issued.
2127 			 */
2128 			hdmi_writeb(hdmi, (u8)~HDMI_MC_SWRSTZ_TMDSSWRST_REQ,
2129 				    HDMI_MC_SWRSTZ);
2130 			hdmi_writeb(hdmi, 1, HDMI_FC_SCRAMBLER_CTRL);
2131 		} else {
2132 			hdmi_writeb(hdmi, 0, HDMI_FC_SCRAMBLER_CTRL);
2133 			hdmi_writeb(hdmi, (u8)~HDMI_MC_SWRSTZ_TMDSSWRST_REQ,
2134 				    HDMI_MC_SWRSTZ);
2135 			drm_scdc_set_scrambling(hdmi->ddc, 0);
2136 		}
2137 	}
2138 
2139 	/* Set up horizontal active pixel width */
2140 	hdmi_writeb(hdmi, hdisplay >> 8, HDMI_FC_INHACTV1);
2141 	hdmi_writeb(hdmi, hdisplay, HDMI_FC_INHACTV0);
2142 
2143 	/* Set up vertical active lines */
2144 	hdmi_writeb(hdmi, vdisplay >> 8, HDMI_FC_INVACTV1);
2145 	hdmi_writeb(hdmi, vdisplay, HDMI_FC_INVACTV0);
2146 
2147 	/* Set up horizontal blanking pixel region width */
2148 	hdmi_writeb(hdmi, hblank >> 8, HDMI_FC_INHBLANK1);
2149 	hdmi_writeb(hdmi, hblank, HDMI_FC_INHBLANK0);
2150 
2151 	/* Set up vertical blanking pixel region width */
2152 	hdmi_writeb(hdmi, vblank, HDMI_FC_INVBLANK);
2153 
2154 	/* Set up HSYNC active edge delay width (in pixel clks) */
2155 	hdmi_writeb(hdmi, h_de_hs >> 8, HDMI_FC_HSYNCINDELAY1);
2156 	hdmi_writeb(hdmi, h_de_hs, HDMI_FC_HSYNCINDELAY0);
2157 
2158 	/* Set up VSYNC active edge delay (in lines) */
2159 	hdmi_writeb(hdmi, v_de_vs, HDMI_FC_VSYNCINDELAY);
2160 
2161 	/* Set up HSYNC active pulse width (in pixel clks) */
2162 	hdmi_writeb(hdmi, hsync_len >> 8, HDMI_FC_HSYNCINWIDTH1);
2163 	hdmi_writeb(hdmi, hsync_len, HDMI_FC_HSYNCINWIDTH0);
2164 
2165 	/* Set up VSYNC active edge delay (in lines) */
2166 	hdmi_writeb(hdmi, vsync_len, HDMI_FC_VSYNCINWIDTH);
2167 }
2168 
2169 /* HDMI Initialization Step B.4 */
2170 static void dw_hdmi_enable_video_path(struct dw_hdmi *hdmi)
2171 {
2172 	/* control period minimum duration */
2173 	hdmi_writeb(hdmi, 12, HDMI_FC_CTRLDUR);
2174 	hdmi_writeb(hdmi, 32, HDMI_FC_EXCTRLDUR);
2175 	hdmi_writeb(hdmi, 1, HDMI_FC_EXCTRLSPAC);
2176 
2177 	/* Set to fill TMDS data channels */
2178 	hdmi_writeb(hdmi, 0x0B, HDMI_FC_CH0PREAM);
2179 	hdmi_writeb(hdmi, 0x16, HDMI_FC_CH1PREAM);
2180 	hdmi_writeb(hdmi, 0x21, HDMI_FC_CH2PREAM);
2181 
2182 	/* Enable pixel clock and tmds data path */
2183 	hdmi->mc_clkdis |= HDMI_MC_CLKDIS_HDCPCLK_DISABLE |
2184 			   HDMI_MC_CLKDIS_CSCCLK_DISABLE |
2185 			   HDMI_MC_CLKDIS_AUDCLK_DISABLE |
2186 			   HDMI_MC_CLKDIS_PREPCLK_DISABLE |
2187 			   HDMI_MC_CLKDIS_TMDSCLK_DISABLE;
2188 	hdmi->mc_clkdis &= ~HDMI_MC_CLKDIS_PIXELCLK_DISABLE;
2189 	hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS);
2190 
2191 	hdmi->mc_clkdis &= ~HDMI_MC_CLKDIS_TMDSCLK_DISABLE;
2192 	hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS);
2193 
2194 	/* Enable csc path */
2195 	if (is_csc_needed(hdmi)) {
2196 		hdmi->mc_clkdis &= ~HDMI_MC_CLKDIS_CSCCLK_DISABLE;
2197 		hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS);
2198 
2199 		hdmi_writeb(hdmi, HDMI_MC_FLOWCTRL_FEED_THROUGH_OFF_CSC_IN_PATH,
2200 			    HDMI_MC_FLOWCTRL);
2201 	} else {
2202 		hdmi->mc_clkdis |= HDMI_MC_CLKDIS_CSCCLK_DISABLE;
2203 		hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS);
2204 
2205 		hdmi_writeb(hdmi, HDMI_MC_FLOWCTRL_FEED_THROUGH_OFF_CSC_BYPASS,
2206 			    HDMI_MC_FLOWCTRL);
2207 	}
2208 }
2209 
2210 /* Workaround to clear the overflow condition */
2211 static void dw_hdmi_clear_overflow(struct dw_hdmi *hdmi)
2212 {
2213 	unsigned int count;
2214 	unsigned int i;
2215 	u8 val;
2216 
2217 	/*
2218 	 * Under some circumstances the Frame Composer arithmetic unit can miss
2219 	 * an FC register write due to being busy processing the previous one.
2220 	 * The issue can be worked around by issuing a TMDS software reset and
2221 	 * then write one of the FC registers several times.
2222 	 *
2223 	 * The number of iterations matters and depends on the HDMI TX revision
2224 	 * (and possibly on the platform).
2225 	 * 4 iterations for i.MX6Q(v1.30a) and 1 iteration for others.
2226 	 * i.MX6DL (v1.31a), Allwinner SoCs (v1.32a), Rockchip RK3288 SoC (v2.00a),
2227 	 * Amlogic Meson GX SoCs (v2.01a), RK3328/RK3399 SoCs (v2.11a)
2228 	 * and i.MX8MPlus (v2.13a) have been identified as needing the workaround
2229 	 * with a single iteration.
2230 	 */
2231 
2232 	switch (hdmi->version) {
2233 	case 0x130a:
2234 		count = 4;
2235 		break;
2236 	default:
2237 		count = 1;
2238 		break;
2239 	}
2240 
2241 	/* TMDS software reset */
2242 	hdmi_writeb(hdmi, (u8)~HDMI_MC_SWRSTZ_TMDSSWRST_REQ, HDMI_MC_SWRSTZ);
2243 
2244 	val = hdmi_readb(hdmi, HDMI_FC_INVIDCONF);
2245 	for (i = 0; i < count; i++)
2246 		hdmi_writeb(hdmi, val, HDMI_FC_INVIDCONF);
2247 }
2248 
2249 static void hdmi_disable_overflow_interrupts(struct dw_hdmi *hdmi)
2250 {
2251 	hdmi_writeb(hdmi, HDMI_IH_MUTE_FC_STAT2_OVERFLOW_MASK,
2252 		    HDMI_IH_MUTE_FC_STAT2);
2253 }
2254 
2255 static int dw_hdmi_setup(struct dw_hdmi *hdmi,
2256 			 const struct drm_connector *connector,
2257 			 const struct drm_display_mode *mode)
2258 {
2259 	int ret;
2260 
2261 	hdmi_disable_overflow_interrupts(hdmi);
2262 
2263 	hdmi->vic = drm_match_cea_mode(mode);
2264 
2265 	if (!hdmi->vic) {
2266 		dev_dbg(hdmi->dev, "Non-CEA mode used in HDMI\n");
2267 	} else {
2268 		dev_dbg(hdmi->dev, "CEA mode used vic=%d\n", hdmi->vic);
2269 	}
2270 
2271 	if ((hdmi->vic == 6) || (hdmi->vic == 7) ||
2272 	    (hdmi->vic == 21) || (hdmi->vic == 22) ||
2273 	    (hdmi->vic == 2) || (hdmi->vic == 3) ||
2274 	    (hdmi->vic == 17) || (hdmi->vic == 18))
2275 		hdmi->hdmi_data.enc_out_encoding = V4L2_YCBCR_ENC_601;
2276 	else
2277 		hdmi->hdmi_data.enc_out_encoding = V4L2_YCBCR_ENC_709;
2278 
2279 	hdmi->hdmi_data.video_mode.mpixelrepetitionoutput = 0;
2280 	hdmi->hdmi_data.video_mode.mpixelrepetitioninput = 0;
2281 
2282 	if (hdmi->hdmi_data.enc_in_bus_format == MEDIA_BUS_FMT_FIXED)
2283 		hdmi->hdmi_data.enc_in_bus_format = MEDIA_BUS_FMT_RGB888_1X24;
2284 
2285 	/* TOFIX: Get input encoding from plat data or fallback to none */
2286 	if (hdmi->plat_data->input_bus_encoding)
2287 		hdmi->hdmi_data.enc_in_encoding =
2288 			hdmi->plat_data->input_bus_encoding;
2289 	else
2290 		hdmi->hdmi_data.enc_in_encoding = V4L2_YCBCR_ENC_DEFAULT;
2291 
2292 	if (hdmi->hdmi_data.enc_out_bus_format == MEDIA_BUS_FMT_FIXED)
2293 		hdmi->hdmi_data.enc_out_bus_format = MEDIA_BUS_FMT_RGB888_1X24;
2294 
2295 	hdmi->hdmi_data.rgb_limited_range = hdmi->sink_is_hdmi &&
2296 		drm_default_rgb_quant_range(mode) ==
2297 		HDMI_QUANTIZATION_RANGE_LIMITED;
2298 
2299 	hdmi->hdmi_data.pix_repet_factor = 0;
2300 	hdmi->hdmi_data.hdcp_enable = 0;
2301 	hdmi->hdmi_data.video_mode.mdataenablepolarity = true;
2302 
2303 	/* HDMI Initialization Step B.1 */
2304 	hdmi_av_composer(hdmi, &connector->display_info, mode);
2305 
2306 	/* HDMI Initializateion Step B.2 */
2307 	ret = hdmi->phy.ops->init(hdmi, hdmi->phy.data,
2308 				  &connector->display_info,
2309 				  &hdmi->previous_mode);
2310 	if (ret)
2311 		return ret;
2312 	hdmi->phy.enabled = true;
2313 
2314 	/* HDMI Initialization Step B.3 */
2315 	dw_hdmi_enable_video_path(hdmi);
2316 
2317 	if (hdmi->sink_has_audio) {
2318 		dev_dbg(hdmi->dev, "sink has audio support\n");
2319 
2320 		/* HDMI Initialization Step E - Configure audio */
2321 		hdmi_clk_regenerator_update_pixel_clock(hdmi);
2322 		hdmi_enable_audio_clk(hdmi, hdmi->audio_enable);
2323 	}
2324 
2325 	/* not for DVI mode */
2326 	if (hdmi->sink_is_hdmi) {
2327 		dev_dbg(hdmi->dev, "%s HDMI mode\n", __func__);
2328 
2329 		/* HDMI Initialization Step F - Configure AVI InfoFrame */
2330 		hdmi_config_AVI(hdmi, connector, mode);
2331 		hdmi_config_vendor_specific_infoframe(hdmi, connector, mode);
2332 		hdmi_config_drm_infoframe(hdmi, connector);
2333 	} else {
2334 		dev_dbg(hdmi->dev, "%s DVI mode\n", __func__);
2335 	}
2336 
2337 	hdmi_video_packetize(hdmi);
2338 	hdmi_video_csc(hdmi);
2339 	hdmi_video_sample(hdmi);
2340 	hdmi_tx_hdcp_config(hdmi);
2341 
2342 	dw_hdmi_clear_overflow(hdmi);
2343 
2344 	return 0;
2345 }
2346 
2347 static void initialize_hdmi_ih_mutes(struct dw_hdmi *hdmi)
2348 {
2349 	u8 ih_mute;
2350 
2351 	/*
2352 	 * Boot up defaults are:
2353 	 * HDMI_IH_MUTE   = 0x03 (disabled)
2354 	 * HDMI_IH_MUTE_* = 0x00 (enabled)
2355 	 *
2356 	 * Disable top level interrupt bits in HDMI block
2357 	 */
2358 	ih_mute = hdmi_readb(hdmi, HDMI_IH_MUTE) |
2359 		  HDMI_IH_MUTE_MUTE_WAKEUP_INTERRUPT |
2360 		  HDMI_IH_MUTE_MUTE_ALL_INTERRUPT;
2361 
2362 	hdmi_writeb(hdmi, ih_mute, HDMI_IH_MUTE);
2363 
2364 	/* by default mask all interrupts */
2365 	hdmi_writeb(hdmi, 0xff, HDMI_VP_MASK);
2366 	hdmi_writeb(hdmi, 0xff, HDMI_FC_MASK0);
2367 	hdmi_writeb(hdmi, 0xff, HDMI_FC_MASK1);
2368 	hdmi_writeb(hdmi, 0xff, HDMI_FC_MASK2);
2369 	hdmi_writeb(hdmi, 0xff, HDMI_PHY_MASK0);
2370 	hdmi_writeb(hdmi, 0xff, HDMI_PHY_I2CM_INT_ADDR);
2371 	hdmi_writeb(hdmi, 0xff, HDMI_PHY_I2CM_CTLINT_ADDR);
2372 	hdmi_writeb(hdmi, 0xff, HDMI_AUD_INT);
2373 	hdmi_writeb(hdmi, 0xff, HDMI_AUD_SPDIFINT);
2374 	hdmi_writeb(hdmi, 0xff, HDMI_AUD_HBR_MASK);
2375 	hdmi_writeb(hdmi, 0xff, HDMI_GP_MASK);
2376 	hdmi_writeb(hdmi, 0xff, HDMI_A_APIINTMSK);
2377 	hdmi_writeb(hdmi, 0xff, HDMI_I2CM_INT);
2378 	hdmi_writeb(hdmi, 0xff, HDMI_I2CM_CTLINT);
2379 
2380 	/* Disable interrupts in the IH_MUTE_* registers */
2381 	hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_FC_STAT0);
2382 	hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_FC_STAT1);
2383 	hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_FC_STAT2);
2384 	hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_AS_STAT0);
2385 	hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_PHY_STAT0);
2386 	hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_I2CM_STAT0);
2387 	hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_CEC_STAT0);
2388 	hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_VP_STAT0);
2389 	hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_I2CMPHY_STAT0);
2390 	hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_AHBDMAAUD_STAT0);
2391 
2392 	/* Enable top level interrupt bits in HDMI block */
2393 	ih_mute &= ~(HDMI_IH_MUTE_MUTE_WAKEUP_INTERRUPT |
2394 		    HDMI_IH_MUTE_MUTE_ALL_INTERRUPT);
2395 	hdmi_writeb(hdmi, ih_mute, HDMI_IH_MUTE);
2396 }
2397 
2398 static void dw_hdmi_poweron(struct dw_hdmi *hdmi)
2399 {
2400 	hdmi->bridge_is_on = true;
2401 
2402 	/*
2403 	 * The curr_conn field is guaranteed to be valid here, as this function
2404 	 * is only be called when !hdmi->disabled.
2405 	 */
2406 	dw_hdmi_setup(hdmi, hdmi->curr_conn, &hdmi->previous_mode);
2407 }
2408 
2409 static void dw_hdmi_poweroff(struct dw_hdmi *hdmi)
2410 {
2411 	if (hdmi->phy.enabled) {
2412 		hdmi->phy.ops->disable(hdmi, hdmi->phy.data);
2413 		hdmi->phy.enabled = false;
2414 	}
2415 
2416 	hdmi->bridge_is_on = false;
2417 }
2418 
2419 static void dw_hdmi_update_power(struct dw_hdmi *hdmi)
2420 {
2421 	int force = hdmi->force;
2422 
2423 	if (hdmi->disabled) {
2424 		force = DRM_FORCE_OFF;
2425 	} else if (force == DRM_FORCE_UNSPECIFIED) {
2426 		if (hdmi->rxsense)
2427 			force = DRM_FORCE_ON;
2428 		else
2429 			force = DRM_FORCE_OFF;
2430 	}
2431 
2432 	if (force == DRM_FORCE_OFF) {
2433 		if (hdmi->bridge_is_on)
2434 			dw_hdmi_poweroff(hdmi);
2435 	} else {
2436 		if (!hdmi->bridge_is_on)
2437 			dw_hdmi_poweron(hdmi);
2438 	}
2439 }
2440 
2441 /*
2442  * Adjust the detection of RXSENSE according to whether we have a forced
2443  * connection mode enabled, or whether we have been disabled.  There is
2444  * no point processing RXSENSE interrupts if we have a forced connection
2445  * state, or DRM has us disabled.
2446  *
2447  * We also disable rxsense interrupts when we think we're disconnected
2448  * to avoid floating TDMS signals giving false rxsense interrupts.
2449  *
2450  * Note: we still need to listen for HPD interrupts even when DRM has us
2451  * disabled so that we can detect a connect event.
2452  */
2453 static void dw_hdmi_update_phy_mask(struct dw_hdmi *hdmi)
2454 {
2455 	if (hdmi->phy.ops->update_hpd)
2456 		hdmi->phy.ops->update_hpd(hdmi, hdmi->phy.data,
2457 					  hdmi->force, hdmi->disabled,
2458 					  hdmi->rxsense);
2459 }
2460 
2461 static enum drm_connector_status dw_hdmi_detect(struct dw_hdmi *hdmi)
2462 {
2463 	enum drm_connector_status result;
2464 
2465 	result = hdmi->phy.ops->read_hpd(hdmi, hdmi->phy.data);
2466 
2467 	mutex_lock(&hdmi->mutex);
2468 	if (result != hdmi->last_connector_result) {
2469 		dev_dbg(hdmi->dev, "read_hpd result: %d", result);
2470 		handle_plugged_change(hdmi,
2471 				      result == connector_status_connected);
2472 		hdmi->last_connector_result = result;
2473 	}
2474 	mutex_unlock(&hdmi->mutex);
2475 
2476 	return result;
2477 }
2478 
2479 static struct edid *dw_hdmi_get_edid(struct dw_hdmi *hdmi,
2480 				     struct drm_connector *connector)
2481 {
2482 	struct edid *edid;
2483 
2484 	if (!hdmi->ddc)
2485 		return NULL;
2486 
2487 	edid = drm_get_edid(connector, hdmi->ddc);
2488 	if (!edid) {
2489 		dev_dbg(hdmi->dev, "failed to get edid\n");
2490 		return NULL;
2491 	}
2492 
2493 	dev_dbg(hdmi->dev, "got edid: width[%d] x height[%d]\n",
2494 		edid->width_cm, edid->height_cm);
2495 
2496 	hdmi->sink_is_hdmi = drm_detect_hdmi_monitor(edid);
2497 	hdmi->sink_has_audio = drm_detect_monitor_audio(edid);
2498 
2499 	return edid;
2500 }
2501 
2502 /* -----------------------------------------------------------------------------
2503  * DRM Connector Operations
2504  */
2505 
2506 static enum drm_connector_status
2507 dw_hdmi_connector_detect(struct drm_connector *connector, bool force)
2508 {
2509 	struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
2510 					     connector);
2511 	return dw_hdmi_detect(hdmi);
2512 }
2513 
2514 static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
2515 {
2516 	struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
2517 					     connector);
2518 	struct edid *edid;
2519 	int ret;
2520 
2521 	edid = dw_hdmi_get_edid(hdmi, connector);
2522 	if (!edid)
2523 		return 0;
2524 
2525 	drm_connector_update_edid_property(connector, edid);
2526 	cec_notifier_set_phys_addr_from_edid(hdmi->cec_notifier, edid);
2527 	ret = drm_add_edid_modes(connector, edid);
2528 	kfree(edid);
2529 
2530 	return ret;
2531 }
2532 
2533 static int dw_hdmi_connector_atomic_check(struct drm_connector *connector,
2534 					  struct drm_atomic_state *state)
2535 {
2536 	struct drm_connector_state *old_state =
2537 		drm_atomic_get_old_connector_state(state, connector);
2538 	struct drm_connector_state *new_state =
2539 		drm_atomic_get_new_connector_state(state, connector);
2540 	struct drm_crtc *crtc = new_state->crtc;
2541 	struct drm_crtc_state *crtc_state;
2542 
2543 	if (!crtc)
2544 		return 0;
2545 
2546 	if (!drm_connector_atomic_hdr_metadata_equal(old_state, new_state)) {
2547 		crtc_state = drm_atomic_get_crtc_state(state, crtc);
2548 		if (IS_ERR(crtc_state))
2549 			return PTR_ERR(crtc_state);
2550 
2551 		crtc_state->mode_changed = true;
2552 	}
2553 
2554 	return 0;
2555 }
2556 
2557 static void dw_hdmi_connector_force(struct drm_connector *connector)
2558 {
2559 	struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
2560 					     connector);
2561 
2562 	mutex_lock(&hdmi->mutex);
2563 	hdmi->force = connector->force;
2564 	dw_hdmi_update_power(hdmi);
2565 	dw_hdmi_update_phy_mask(hdmi);
2566 	mutex_unlock(&hdmi->mutex);
2567 }
2568 
2569 static const struct drm_connector_funcs dw_hdmi_connector_funcs = {
2570 	.fill_modes = drm_helper_probe_single_connector_modes,
2571 	.detect = dw_hdmi_connector_detect,
2572 	.destroy = drm_connector_cleanup,
2573 	.force = dw_hdmi_connector_force,
2574 	.reset = drm_atomic_helper_connector_reset,
2575 	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
2576 	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
2577 };
2578 
2579 static const struct drm_connector_helper_funcs dw_hdmi_connector_helper_funcs = {
2580 	.get_modes = dw_hdmi_connector_get_modes,
2581 	.atomic_check = dw_hdmi_connector_atomic_check,
2582 };
2583 
2584 static int dw_hdmi_connector_create(struct dw_hdmi *hdmi)
2585 {
2586 	struct drm_connector *connector = &hdmi->connector;
2587 	struct cec_connector_info conn_info;
2588 	struct cec_notifier *notifier;
2589 
2590 	if (hdmi->version >= 0x200a)
2591 		connector->ycbcr_420_allowed =
2592 			hdmi->plat_data->ycbcr_420_allowed;
2593 	else
2594 		connector->ycbcr_420_allowed = false;
2595 
2596 	connector->interlace_allowed = 1;
2597 	connector->polled = DRM_CONNECTOR_POLL_HPD;
2598 
2599 	drm_connector_helper_add(connector, &dw_hdmi_connector_helper_funcs);
2600 
2601 	drm_connector_init_with_ddc(hdmi->bridge.dev, connector,
2602 				    &dw_hdmi_connector_funcs,
2603 				    DRM_MODE_CONNECTOR_HDMIA,
2604 				    hdmi->ddc);
2605 
2606 	/*
2607 	 * drm_connector_attach_max_bpc_property() requires the
2608 	 * connector to have a state.
2609 	 */
2610 	drm_atomic_helper_connector_reset(connector);
2611 
2612 	drm_connector_attach_max_bpc_property(connector, 8, 16);
2613 
2614 	if (hdmi->version >= 0x200a && hdmi->plat_data->use_drm_infoframe)
2615 		drm_connector_attach_hdr_output_metadata_property(connector);
2616 
2617 	drm_connector_attach_encoder(connector, hdmi->bridge.encoder);
2618 
2619 	cec_fill_conn_info_from_drm(&conn_info, connector);
2620 
2621 	notifier = cec_notifier_conn_register(hdmi->dev, NULL, &conn_info);
2622 	if (!notifier)
2623 		return -ENOMEM;
2624 
2625 	mutex_lock(&hdmi->cec_notifier_mutex);
2626 	hdmi->cec_notifier = notifier;
2627 	mutex_unlock(&hdmi->cec_notifier_mutex);
2628 
2629 	return 0;
2630 }
2631 
2632 /* -----------------------------------------------------------------------------
2633  * DRM Bridge Operations
2634  */
2635 
2636 /*
2637  * Possible output formats :
2638  * - MEDIA_BUS_FMT_UYYVYY16_0_5X48,
2639  * - MEDIA_BUS_FMT_UYYVYY12_0_5X36,
2640  * - MEDIA_BUS_FMT_UYYVYY10_0_5X30,
2641  * - MEDIA_BUS_FMT_UYYVYY8_0_5X24,
2642  * - MEDIA_BUS_FMT_YUV16_1X48,
2643  * - MEDIA_BUS_FMT_RGB161616_1X48,
2644  * - MEDIA_BUS_FMT_UYVY12_1X24,
2645  * - MEDIA_BUS_FMT_YUV12_1X36,
2646  * - MEDIA_BUS_FMT_RGB121212_1X36,
2647  * - MEDIA_BUS_FMT_UYVY10_1X20,
2648  * - MEDIA_BUS_FMT_YUV10_1X30,
2649  * - MEDIA_BUS_FMT_RGB101010_1X30,
2650  * - MEDIA_BUS_FMT_UYVY8_1X16,
2651  * - MEDIA_BUS_FMT_YUV8_1X24,
2652  * - MEDIA_BUS_FMT_RGB888_1X24,
2653  */
2654 
2655 /* Can return a maximum of 11 possible output formats for a mode/connector */
2656 #define MAX_OUTPUT_SEL_FORMATS	11
2657 
2658 static u32 *dw_hdmi_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
2659 					struct drm_bridge_state *bridge_state,
2660 					struct drm_crtc_state *crtc_state,
2661 					struct drm_connector_state *conn_state,
2662 					unsigned int *num_output_fmts)
2663 {
2664 	struct drm_connector *conn = conn_state->connector;
2665 	struct drm_display_info *info = &conn->display_info;
2666 	struct drm_display_mode *mode = &crtc_state->mode;
2667 	u8 max_bpc = conn_state->max_requested_bpc;
2668 	bool is_hdmi2_sink = info->hdmi.scdc.supported ||
2669 			     (info->color_formats & DRM_COLOR_FORMAT_YCBCR420);
2670 	u32 *output_fmts;
2671 	unsigned int i = 0;
2672 
2673 	*num_output_fmts = 0;
2674 
2675 	output_fmts = kcalloc(MAX_OUTPUT_SEL_FORMATS, sizeof(*output_fmts),
2676 			      GFP_KERNEL);
2677 	if (!output_fmts)
2678 		return NULL;
2679 
2680 	/* If dw-hdmi is the first or only bridge, avoid negociating with ourselves */
2681 	if (list_is_singular(&bridge->encoder->bridge_chain) ||
2682 	    list_is_first(&bridge->chain_node, &bridge->encoder->bridge_chain)) {
2683 		*num_output_fmts = 1;
2684 		output_fmts[0] = MEDIA_BUS_FMT_FIXED;
2685 
2686 		return output_fmts;
2687 	}
2688 
2689 	/*
2690 	 * If the current mode enforces 4:2:0, force the output but format
2691 	 * to 4:2:0 and do not add the YUV422/444/RGB formats
2692 	 */
2693 	if (conn->ycbcr_420_allowed &&
2694 	    (drm_mode_is_420_only(info, mode) ||
2695 	     (is_hdmi2_sink && drm_mode_is_420_also(info, mode)))) {
2696 
2697 		/* Order bus formats from 16bit to 8bit if supported */
2698 		if (max_bpc >= 16 && info->bpc == 16 &&
2699 		    (info->hdmi.y420_dc_modes & DRM_EDID_YCBCR420_DC_48))
2700 			output_fmts[i++] = MEDIA_BUS_FMT_UYYVYY16_0_5X48;
2701 
2702 		if (max_bpc >= 12 && info->bpc >= 12 &&
2703 		    (info->hdmi.y420_dc_modes & DRM_EDID_YCBCR420_DC_36))
2704 			output_fmts[i++] = MEDIA_BUS_FMT_UYYVYY12_0_5X36;
2705 
2706 		if (max_bpc >= 10 && info->bpc >= 10 &&
2707 		    (info->hdmi.y420_dc_modes & DRM_EDID_YCBCR420_DC_30))
2708 			output_fmts[i++] = MEDIA_BUS_FMT_UYYVYY10_0_5X30;
2709 
2710 		/* Default 8bit fallback */
2711 		output_fmts[i++] = MEDIA_BUS_FMT_UYYVYY8_0_5X24;
2712 
2713 		*num_output_fmts = i;
2714 
2715 		return output_fmts;
2716 	}
2717 
2718 	/*
2719 	 * Order bus formats from 16bit to 8bit and from YUV422 to RGB
2720 	 * if supported. In any case the default RGB888 format is added
2721 	 */
2722 
2723 	if (max_bpc >= 16 && info->bpc == 16) {
2724 		if (info->color_formats & DRM_COLOR_FORMAT_YCBCR444)
2725 			output_fmts[i++] = MEDIA_BUS_FMT_YUV16_1X48;
2726 
2727 		output_fmts[i++] = MEDIA_BUS_FMT_RGB161616_1X48;
2728 	}
2729 
2730 	if (max_bpc >= 12 && info->bpc >= 12) {
2731 		if (info->color_formats & DRM_COLOR_FORMAT_YCBCR422)
2732 			output_fmts[i++] = MEDIA_BUS_FMT_UYVY12_1X24;
2733 
2734 		if (info->color_formats & DRM_COLOR_FORMAT_YCBCR444)
2735 			output_fmts[i++] = MEDIA_BUS_FMT_YUV12_1X36;
2736 
2737 		output_fmts[i++] = MEDIA_BUS_FMT_RGB121212_1X36;
2738 	}
2739 
2740 	if (max_bpc >= 10 && info->bpc >= 10) {
2741 		if (info->color_formats & DRM_COLOR_FORMAT_YCBCR422)
2742 			output_fmts[i++] = MEDIA_BUS_FMT_UYVY10_1X20;
2743 
2744 		if (info->color_formats & DRM_COLOR_FORMAT_YCBCR444)
2745 			output_fmts[i++] = MEDIA_BUS_FMT_YUV10_1X30;
2746 
2747 		output_fmts[i++] = MEDIA_BUS_FMT_RGB101010_1X30;
2748 	}
2749 
2750 	if (info->color_formats & DRM_COLOR_FORMAT_YCBCR422)
2751 		output_fmts[i++] = MEDIA_BUS_FMT_UYVY8_1X16;
2752 
2753 	if (info->color_formats & DRM_COLOR_FORMAT_YCBCR444)
2754 		output_fmts[i++] = MEDIA_BUS_FMT_YUV8_1X24;
2755 
2756 	/* Default 8bit RGB fallback */
2757 	output_fmts[i++] = MEDIA_BUS_FMT_RGB888_1X24;
2758 
2759 	*num_output_fmts = i;
2760 
2761 	return output_fmts;
2762 }
2763 
2764 /*
2765  * Possible input formats :
2766  * - MEDIA_BUS_FMT_RGB888_1X24
2767  * - MEDIA_BUS_FMT_YUV8_1X24
2768  * - MEDIA_BUS_FMT_UYVY8_1X16
2769  * - MEDIA_BUS_FMT_UYYVYY8_0_5X24
2770  * - MEDIA_BUS_FMT_RGB101010_1X30
2771  * - MEDIA_BUS_FMT_YUV10_1X30
2772  * - MEDIA_BUS_FMT_UYVY10_1X20
2773  * - MEDIA_BUS_FMT_UYYVYY10_0_5X30
2774  * - MEDIA_BUS_FMT_RGB121212_1X36
2775  * - MEDIA_BUS_FMT_YUV12_1X36
2776  * - MEDIA_BUS_FMT_UYVY12_1X24
2777  * - MEDIA_BUS_FMT_UYYVYY12_0_5X36
2778  * - MEDIA_BUS_FMT_RGB161616_1X48
2779  * - MEDIA_BUS_FMT_YUV16_1X48
2780  * - MEDIA_BUS_FMT_UYYVYY16_0_5X48
2781  */
2782 
2783 /* Can return a maximum of 3 possible input formats for an output format */
2784 #define MAX_INPUT_SEL_FORMATS	3
2785 
2786 static u32 *dw_hdmi_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
2787 					struct drm_bridge_state *bridge_state,
2788 					struct drm_crtc_state *crtc_state,
2789 					struct drm_connector_state *conn_state,
2790 					u32 output_fmt,
2791 					unsigned int *num_input_fmts)
2792 {
2793 	u32 *input_fmts;
2794 	unsigned int i = 0;
2795 
2796 	*num_input_fmts = 0;
2797 
2798 	input_fmts = kcalloc(MAX_INPUT_SEL_FORMATS, sizeof(*input_fmts),
2799 			     GFP_KERNEL);
2800 	if (!input_fmts)
2801 		return NULL;
2802 
2803 	switch (output_fmt) {
2804 	/* If MEDIA_BUS_FMT_FIXED is tested, return default bus format */
2805 	case MEDIA_BUS_FMT_FIXED:
2806 		input_fmts[i++] = MEDIA_BUS_FMT_RGB888_1X24;
2807 		break;
2808 	/* 8bit */
2809 	case MEDIA_BUS_FMT_RGB888_1X24:
2810 		input_fmts[i++] = MEDIA_BUS_FMT_RGB888_1X24;
2811 		input_fmts[i++] = MEDIA_BUS_FMT_YUV8_1X24;
2812 		input_fmts[i++] = MEDIA_BUS_FMT_UYVY8_1X16;
2813 		break;
2814 	case MEDIA_BUS_FMT_YUV8_1X24:
2815 		input_fmts[i++] = MEDIA_BUS_FMT_YUV8_1X24;
2816 		input_fmts[i++] = MEDIA_BUS_FMT_UYVY8_1X16;
2817 		input_fmts[i++] = MEDIA_BUS_FMT_RGB888_1X24;
2818 		break;
2819 	case MEDIA_BUS_FMT_UYVY8_1X16:
2820 		input_fmts[i++] = MEDIA_BUS_FMT_UYVY8_1X16;
2821 		input_fmts[i++] = MEDIA_BUS_FMT_YUV8_1X24;
2822 		input_fmts[i++] = MEDIA_BUS_FMT_RGB888_1X24;
2823 		break;
2824 
2825 	/* 10bit */
2826 	case MEDIA_BUS_FMT_RGB101010_1X30:
2827 		input_fmts[i++] = MEDIA_BUS_FMT_RGB101010_1X30;
2828 		input_fmts[i++] = MEDIA_BUS_FMT_YUV10_1X30;
2829 		input_fmts[i++] = MEDIA_BUS_FMT_UYVY10_1X20;
2830 		break;
2831 	case MEDIA_BUS_FMT_YUV10_1X30:
2832 		input_fmts[i++] = MEDIA_BUS_FMT_YUV10_1X30;
2833 		input_fmts[i++] = MEDIA_BUS_FMT_UYVY10_1X20;
2834 		input_fmts[i++] = MEDIA_BUS_FMT_RGB101010_1X30;
2835 		break;
2836 	case MEDIA_BUS_FMT_UYVY10_1X20:
2837 		input_fmts[i++] = MEDIA_BUS_FMT_UYVY10_1X20;
2838 		input_fmts[i++] = MEDIA_BUS_FMT_YUV10_1X30;
2839 		input_fmts[i++] = MEDIA_BUS_FMT_RGB101010_1X30;
2840 		break;
2841 
2842 	/* 12bit */
2843 	case MEDIA_BUS_FMT_RGB121212_1X36:
2844 		input_fmts[i++] = MEDIA_BUS_FMT_RGB121212_1X36;
2845 		input_fmts[i++] = MEDIA_BUS_FMT_YUV12_1X36;
2846 		input_fmts[i++] = MEDIA_BUS_FMT_UYVY12_1X24;
2847 		break;
2848 	case MEDIA_BUS_FMT_YUV12_1X36:
2849 		input_fmts[i++] = MEDIA_BUS_FMT_YUV12_1X36;
2850 		input_fmts[i++] = MEDIA_BUS_FMT_UYVY12_1X24;
2851 		input_fmts[i++] = MEDIA_BUS_FMT_RGB121212_1X36;
2852 		break;
2853 	case MEDIA_BUS_FMT_UYVY12_1X24:
2854 		input_fmts[i++] = MEDIA_BUS_FMT_UYVY12_1X24;
2855 		input_fmts[i++] = MEDIA_BUS_FMT_YUV12_1X36;
2856 		input_fmts[i++] = MEDIA_BUS_FMT_RGB121212_1X36;
2857 		break;
2858 
2859 	/* 16bit */
2860 	case MEDIA_BUS_FMT_RGB161616_1X48:
2861 		input_fmts[i++] = MEDIA_BUS_FMT_RGB161616_1X48;
2862 		input_fmts[i++] = MEDIA_BUS_FMT_YUV16_1X48;
2863 		break;
2864 	case MEDIA_BUS_FMT_YUV16_1X48:
2865 		input_fmts[i++] = MEDIA_BUS_FMT_YUV16_1X48;
2866 		input_fmts[i++] = MEDIA_BUS_FMT_RGB161616_1X48;
2867 		break;
2868 
2869 	/*YUV 4:2:0 */
2870 	case MEDIA_BUS_FMT_UYYVYY8_0_5X24:
2871 	case MEDIA_BUS_FMT_UYYVYY10_0_5X30:
2872 	case MEDIA_BUS_FMT_UYYVYY12_0_5X36:
2873 	case MEDIA_BUS_FMT_UYYVYY16_0_5X48:
2874 		input_fmts[i++] = output_fmt;
2875 		break;
2876 	}
2877 
2878 	*num_input_fmts = i;
2879 
2880 	if (*num_input_fmts == 0) {
2881 		kfree(input_fmts);
2882 		input_fmts = NULL;
2883 	}
2884 
2885 	return input_fmts;
2886 }
2887 
2888 static int dw_hdmi_bridge_atomic_check(struct drm_bridge *bridge,
2889 				       struct drm_bridge_state *bridge_state,
2890 				       struct drm_crtc_state *crtc_state,
2891 				       struct drm_connector_state *conn_state)
2892 {
2893 	struct dw_hdmi *hdmi = bridge->driver_private;
2894 
2895 	hdmi->hdmi_data.enc_out_bus_format =
2896 			bridge_state->output_bus_cfg.format;
2897 
2898 	hdmi->hdmi_data.enc_in_bus_format =
2899 			bridge_state->input_bus_cfg.format;
2900 
2901 	dev_dbg(hdmi->dev, "input format 0x%04x, output format 0x%04x\n",
2902 		bridge_state->input_bus_cfg.format,
2903 		bridge_state->output_bus_cfg.format);
2904 
2905 	return 0;
2906 }
2907 
2908 static int dw_hdmi_bridge_attach(struct drm_bridge *bridge,
2909 				 enum drm_bridge_attach_flags flags)
2910 {
2911 	struct dw_hdmi *hdmi = bridge->driver_private;
2912 
2913 	if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)
2914 		return drm_bridge_attach(bridge->encoder, hdmi->next_bridge,
2915 					 bridge, flags);
2916 
2917 	return dw_hdmi_connector_create(hdmi);
2918 }
2919 
2920 static void dw_hdmi_bridge_detach(struct drm_bridge *bridge)
2921 {
2922 	struct dw_hdmi *hdmi = bridge->driver_private;
2923 
2924 	mutex_lock(&hdmi->cec_notifier_mutex);
2925 	cec_notifier_conn_unregister(hdmi->cec_notifier);
2926 	hdmi->cec_notifier = NULL;
2927 	mutex_unlock(&hdmi->cec_notifier_mutex);
2928 }
2929 
2930 static enum drm_mode_status
2931 dw_hdmi_bridge_mode_valid(struct drm_bridge *bridge,
2932 			  const struct drm_display_info *info,
2933 			  const struct drm_display_mode *mode)
2934 {
2935 	struct dw_hdmi *hdmi = bridge->driver_private;
2936 	const struct dw_hdmi_plat_data *pdata = hdmi->plat_data;
2937 	enum drm_mode_status mode_status = MODE_OK;
2938 
2939 	/* We don't support double-clocked modes */
2940 	if (mode->flags & DRM_MODE_FLAG_DBLCLK)
2941 		return MODE_BAD;
2942 
2943 	if (pdata->mode_valid)
2944 		mode_status = pdata->mode_valid(hdmi, pdata->priv_data, info,
2945 						mode);
2946 
2947 	return mode_status;
2948 }
2949 
2950 static void dw_hdmi_bridge_mode_set(struct drm_bridge *bridge,
2951 				    const struct drm_display_mode *orig_mode,
2952 				    const struct drm_display_mode *mode)
2953 {
2954 	struct dw_hdmi *hdmi = bridge->driver_private;
2955 
2956 	mutex_lock(&hdmi->mutex);
2957 
2958 	/* Store the display mode for plugin/DKMS poweron events */
2959 	drm_mode_copy(&hdmi->previous_mode, mode);
2960 
2961 	mutex_unlock(&hdmi->mutex);
2962 }
2963 
2964 static void dw_hdmi_bridge_atomic_disable(struct drm_bridge *bridge,
2965 					  struct drm_bridge_state *old_state)
2966 {
2967 	struct dw_hdmi *hdmi = bridge->driver_private;
2968 
2969 	mutex_lock(&hdmi->mutex);
2970 	hdmi->disabled = true;
2971 	hdmi->curr_conn = NULL;
2972 	dw_hdmi_update_power(hdmi);
2973 	dw_hdmi_update_phy_mask(hdmi);
2974 	mutex_unlock(&hdmi->mutex);
2975 }
2976 
2977 static void dw_hdmi_bridge_atomic_enable(struct drm_bridge *bridge,
2978 					 struct drm_bridge_state *old_state)
2979 {
2980 	struct dw_hdmi *hdmi = bridge->driver_private;
2981 	struct drm_atomic_state *state = old_state->base.state;
2982 	struct drm_connector *connector;
2983 
2984 	connector = drm_atomic_get_new_connector_for_encoder(state,
2985 							     bridge->encoder);
2986 
2987 	mutex_lock(&hdmi->mutex);
2988 	hdmi->disabled = false;
2989 	hdmi->curr_conn = connector;
2990 	dw_hdmi_update_power(hdmi);
2991 	dw_hdmi_update_phy_mask(hdmi);
2992 	mutex_unlock(&hdmi->mutex);
2993 }
2994 
2995 static enum drm_connector_status dw_hdmi_bridge_detect(struct drm_bridge *bridge)
2996 {
2997 	struct dw_hdmi *hdmi = bridge->driver_private;
2998 
2999 	return dw_hdmi_detect(hdmi);
3000 }
3001 
3002 static struct edid *dw_hdmi_bridge_get_edid(struct drm_bridge *bridge,
3003 					    struct drm_connector *connector)
3004 {
3005 	struct dw_hdmi *hdmi = bridge->driver_private;
3006 
3007 	return dw_hdmi_get_edid(hdmi, connector);
3008 }
3009 
3010 static const struct drm_bridge_funcs dw_hdmi_bridge_funcs = {
3011 	.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
3012 	.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
3013 	.atomic_reset = drm_atomic_helper_bridge_reset,
3014 	.attach = dw_hdmi_bridge_attach,
3015 	.detach = dw_hdmi_bridge_detach,
3016 	.atomic_check = dw_hdmi_bridge_atomic_check,
3017 	.atomic_get_output_bus_fmts = dw_hdmi_bridge_atomic_get_output_bus_fmts,
3018 	.atomic_get_input_bus_fmts = dw_hdmi_bridge_atomic_get_input_bus_fmts,
3019 	.atomic_enable = dw_hdmi_bridge_atomic_enable,
3020 	.atomic_disable = dw_hdmi_bridge_atomic_disable,
3021 	.mode_set = dw_hdmi_bridge_mode_set,
3022 	.mode_valid = dw_hdmi_bridge_mode_valid,
3023 	.detect = dw_hdmi_bridge_detect,
3024 	.get_edid = dw_hdmi_bridge_get_edid,
3025 };
3026 
3027 /* -----------------------------------------------------------------------------
3028  * IRQ Handling
3029  */
3030 
3031 static irqreturn_t dw_hdmi_i2c_irq(struct dw_hdmi *hdmi)
3032 {
3033 	struct dw_hdmi_i2c *i2c = hdmi->i2c;
3034 	unsigned int stat;
3035 
3036 	stat = hdmi_readb(hdmi, HDMI_IH_I2CM_STAT0);
3037 	if (!stat)
3038 		return IRQ_NONE;
3039 
3040 	hdmi_writeb(hdmi, stat, HDMI_IH_I2CM_STAT0);
3041 
3042 	i2c->stat = stat;
3043 
3044 	complete(&i2c->cmp);
3045 
3046 	return IRQ_HANDLED;
3047 }
3048 
3049 static irqreturn_t dw_hdmi_hardirq(int irq, void *dev_id)
3050 {
3051 	struct dw_hdmi *hdmi = dev_id;
3052 	u8 intr_stat;
3053 	irqreturn_t ret = IRQ_NONE;
3054 
3055 	if (hdmi->i2c)
3056 		ret = dw_hdmi_i2c_irq(hdmi);
3057 
3058 	intr_stat = hdmi_readb(hdmi, HDMI_IH_PHY_STAT0);
3059 	if (intr_stat) {
3060 		hdmi_writeb(hdmi, ~0, HDMI_IH_MUTE_PHY_STAT0);
3061 		return IRQ_WAKE_THREAD;
3062 	}
3063 
3064 	return ret;
3065 }
3066 
3067 void dw_hdmi_setup_rx_sense(struct dw_hdmi *hdmi, bool hpd, bool rx_sense)
3068 {
3069 	mutex_lock(&hdmi->mutex);
3070 
3071 	if (!hdmi->force) {
3072 		/*
3073 		 * If the RX sense status indicates we're disconnected,
3074 		 * clear the software rxsense status.
3075 		 */
3076 		if (!rx_sense)
3077 			hdmi->rxsense = false;
3078 
3079 		/*
3080 		 * Only set the software rxsense status when both
3081 		 * rxsense and hpd indicates we're connected.
3082 		 * This avoids what seems to be bad behaviour in
3083 		 * at least iMX6S versions of the phy.
3084 		 */
3085 		if (hpd)
3086 			hdmi->rxsense = true;
3087 
3088 		dw_hdmi_update_power(hdmi);
3089 		dw_hdmi_update_phy_mask(hdmi);
3090 	}
3091 	mutex_unlock(&hdmi->mutex);
3092 }
3093 EXPORT_SYMBOL_GPL(dw_hdmi_setup_rx_sense);
3094 
3095 static irqreturn_t dw_hdmi_irq(int irq, void *dev_id)
3096 {
3097 	struct dw_hdmi *hdmi = dev_id;
3098 	u8 intr_stat, phy_int_pol, phy_pol_mask, phy_stat;
3099 	enum drm_connector_status status = connector_status_unknown;
3100 
3101 	intr_stat = hdmi_readb(hdmi, HDMI_IH_PHY_STAT0);
3102 	phy_int_pol = hdmi_readb(hdmi, HDMI_PHY_POL0);
3103 	phy_stat = hdmi_readb(hdmi, HDMI_PHY_STAT0);
3104 
3105 	phy_pol_mask = 0;
3106 	if (intr_stat & HDMI_IH_PHY_STAT0_HPD)
3107 		phy_pol_mask |= HDMI_PHY_HPD;
3108 	if (intr_stat & HDMI_IH_PHY_STAT0_RX_SENSE0)
3109 		phy_pol_mask |= HDMI_PHY_RX_SENSE0;
3110 	if (intr_stat & HDMI_IH_PHY_STAT0_RX_SENSE1)
3111 		phy_pol_mask |= HDMI_PHY_RX_SENSE1;
3112 	if (intr_stat & HDMI_IH_PHY_STAT0_RX_SENSE2)
3113 		phy_pol_mask |= HDMI_PHY_RX_SENSE2;
3114 	if (intr_stat & HDMI_IH_PHY_STAT0_RX_SENSE3)
3115 		phy_pol_mask |= HDMI_PHY_RX_SENSE3;
3116 
3117 	if (phy_pol_mask)
3118 		hdmi_modb(hdmi, ~phy_int_pol, phy_pol_mask, HDMI_PHY_POL0);
3119 
3120 	/*
3121 	 * RX sense tells us whether the TDMS transmitters are detecting
3122 	 * load - in other words, there's something listening on the
3123 	 * other end of the link.  Use this to decide whether we should
3124 	 * power on the phy as HPD may be toggled by the sink to merely
3125 	 * ask the source to re-read the EDID.
3126 	 */
3127 	if (intr_stat &
3128 	    (HDMI_IH_PHY_STAT0_RX_SENSE | HDMI_IH_PHY_STAT0_HPD)) {
3129 		dw_hdmi_setup_rx_sense(hdmi,
3130 				       phy_stat & HDMI_PHY_HPD,
3131 				       phy_stat & HDMI_PHY_RX_SENSE);
3132 
3133 		if ((phy_stat & (HDMI_PHY_RX_SENSE | HDMI_PHY_HPD)) == 0) {
3134 			mutex_lock(&hdmi->cec_notifier_mutex);
3135 			cec_notifier_phys_addr_invalidate(hdmi->cec_notifier);
3136 			mutex_unlock(&hdmi->cec_notifier_mutex);
3137 		}
3138 
3139 		if (phy_stat & HDMI_PHY_HPD)
3140 			status = connector_status_connected;
3141 
3142 		if (!(phy_stat & (HDMI_PHY_HPD | HDMI_PHY_RX_SENSE)))
3143 			status = connector_status_disconnected;
3144 	}
3145 
3146 	if (status != connector_status_unknown) {
3147 		dev_dbg(hdmi->dev, "EVENT=%s\n",
3148 			status == connector_status_connected ?
3149 			"plugin" : "plugout");
3150 
3151 		if (hdmi->bridge.dev) {
3152 			drm_helper_hpd_irq_event(hdmi->bridge.dev);
3153 			drm_bridge_hpd_notify(&hdmi->bridge, status);
3154 		}
3155 	}
3156 
3157 	hdmi_writeb(hdmi, intr_stat, HDMI_IH_PHY_STAT0);
3158 	hdmi_writeb(hdmi, ~(HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE),
3159 		    HDMI_IH_MUTE_PHY_STAT0);
3160 
3161 	return IRQ_HANDLED;
3162 }
3163 
3164 static const struct dw_hdmi_phy_data dw_hdmi_phys[] = {
3165 	{
3166 		.type = DW_HDMI_PHY_DWC_HDMI_TX_PHY,
3167 		.name = "DWC HDMI TX PHY",
3168 		.gen = 1,
3169 	}, {
3170 		.type = DW_HDMI_PHY_DWC_MHL_PHY_HEAC,
3171 		.name = "DWC MHL PHY + HEAC PHY",
3172 		.gen = 2,
3173 		.has_svsret = true,
3174 		.configure = hdmi_phy_configure_dwc_hdmi_3d_tx,
3175 	}, {
3176 		.type = DW_HDMI_PHY_DWC_MHL_PHY,
3177 		.name = "DWC MHL PHY",
3178 		.gen = 2,
3179 		.has_svsret = true,
3180 		.configure = hdmi_phy_configure_dwc_hdmi_3d_tx,
3181 	}, {
3182 		.type = DW_HDMI_PHY_DWC_HDMI_3D_TX_PHY_HEAC,
3183 		.name = "DWC HDMI 3D TX PHY + HEAC PHY",
3184 		.gen = 2,
3185 		.configure = hdmi_phy_configure_dwc_hdmi_3d_tx,
3186 	}, {
3187 		.type = DW_HDMI_PHY_DWC_HDMI_3D_TX_PHY,
3188 		.name = "DWC HDMI 3D TX PHY",
3189 		.gen = 2,
3190 		.configure = hdmi_phy_configure_dwc_hdmi_3d_tx,
3191 	}, {
3192 		.type = DW_HDMI_PHY_DWC_HDMI20_TX_PHY,
3193 		.name = "DWC HDMI 2.0 TX PHY",
3194 		.gen = 2,
3195 		.has_svsret = true,
3196 		.configure = hdmi_phy_configure_dwc_hdmi_3d_tx,
3197 	}, {
3198 		.type = DW_HDMI_PHY_VENDOR_PHY,
3199 		.name = "Vendor PHY",
3200 	}
3201 };
3202 
3203 static int dw_hdmi_detect_phy(struct dw_hdmi *hdmi)
3204 {
3205 	unsigned int i;
3206 	u8 phy_type;
3207 
3208 	phy_type = hdmi->plat_data->phy_force_vendor ?
3209 				DW_HDMI_PHY_VENDOR_PHY :
3210 				hdmi_readb(hdmi, HDMI_CONFIG2_ID);
3211 
3212 	if (phy_type == DW_HDMI_PHY_VENDOR_PHY) {
3213 		/* Vendor PHYs require support from the glue layer. */
3214 		if (!hdmi->plat_data->phy_ops || !hdmi->plat_data->phy_name) {
3215 			dev_err(hdmi->dev,
3216 				"Vendor HDMI PHY not supported by glue layer\n");
3217 			return -ENODEV;
3218 		}
3219 
3220 		hdmi->phy.ops = hdmi->plat_data->phy_ops;
3221 		hdmi->phy.data = hdmi->plat_data->phy_data;
3222 		hdmi->phy.name = hdmi->plat_data->phy_name;
3223 		return 0;
3224 	}
3225 
3226 	/* Synopsys PHYs are handled internally. */
3227 	for (i = 0; i < ARRAY_SIZE(dw_hdmi_phys); ++i) {
3228 		if (dw_hdmi_phys[i].type == phy_type) {
3229 			hdmi->phy.ops = &dw_hdmi_synopsys_phy_ops;
3230 			hdmi->phy.name = dw_hdmi_phys[i].name;
3231 			hdmi->phy.data = (void *)&dw_hdmi_phys[i];
3232 
3233 			if (!dw_hdmi_phys[i].configure &&
3234 			    !hdmi->plat_data->configure_phy) {
3235 				dev_err(hdmi->dev, "%s requires platform support\n",
3236 					hdmi->phy.name);
3237 				return -ENODEV;
3238 			}
3239 
3240 			return 0;
3241 		}
3242 	}
3243 
3244 	dev_err(hdmi->dev, "Unsupported HDMI PHY type (%02x)\n", phy_type);
3245 	return -ENODEV;
3246 }
3247 
3248 static void dw_hdmi_cec_enable(struct dw_hdmi *hdmi)
3249 {
3250 	mutex_lock(&hdmi->mutex);
3251 	hdmi->mc_clkdis &= ~HDMI_MC_CLKDIS_CECCLK_DISABLE;
3252 	hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS);
3253 	mutex_unlock(&hdmi->mutex);
3254 }
3255 
3256 static void dw_hdmi_cec_disable(struct dw_hdmi *hdmi)
3257 {
3258 	mutex_lock(&hdmi->mutex);
3259 	hdmi->mc_clkdis |= HDMI_MC_CLKDIS_CECCLK_DISABLE;
3260 	hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS);
3261 	mutex_unlock(&hdmi->mutex);
3262 }
3263 
3264 static const struct dw_hdmi_cec_ops dw_hdmi_cec_ops = {
3265 	.write = hdmi_writeb,
3266 	.read = hdmi_readb,
3267 	.enable = dw_hdmi_cec_enable,
3268 	.disable = dw_hdmi_cec_disable,
3269 };
3270 
3271 static const struct regmap_config hdmi_regmap_8bit_config = {
3272 	.reg_bits	= 32,
3273 	.val_bits	= 8,
3274 	.reg_stride	= 1,
3275 	.max_register	= HDMI_I2CM_FS_SCL_LCNT_0_ADDR,
3276 };
3277 
3278 static const struct regmap_config hdmi_regmap_32bit_config = {
3279 	.reg_bits	= 32,
3280 	.val_bits	= 32,
3281 	.reg_stride	= 4,
3282 	.max_register	= HDMI_I2CM_FS_SCL_LCNT_0_ADDR << 2,
3283 };
3284 
3285 static void dw_hdmi_init_hw(struct dw_hdmi *hdmi)
3286 {
3287 	initialize_hdmi_ih_mutes(hdmi);
3288 
3289 	/*
3290 	 * Reset HDMI DDC I2C master controller and mute I2CM interrupts.
3291 	 * Even if we are using a separate i2c adapter doing this doesn't
3292 	 * hurt.
3293 	 */
3294 	dw_hdmi_i2c_init(hdmi);
3295 
3296 	if (hdmi->phy.ops->setup_hpd)
3297 		hdmi->phy.ops->setup_hpd(hdmi, hdmi->phy.data);
3298 }
3299 
3300 /* -----------------------------------------------------------------------------
3301  * Probe/remove API, used from platforms based on the DRM bridge API.
3302  */
3303 
3304 static int dw_hdmi_parse_dt(struct dw_hdmi *hdmi)
3305 {
3306 	struct device_node *endpoint;
3307 	struct device_node *remote;
3308 
3309 	if (!hdmi->plat_data->output_port)
3310 		return 0;
3311 
3312 	endpoint = of_graph_get_endpoint_by_regs(hdmi->dev->of_node,
3313 						 hdmi->plat_data->output_port,
3314 						 -1);
3315 	if (!endpoint) {
3316 		/*
3317 		 * On platforms whose bindings don't make the output port
3318 		 * mandatory (such as Rockchip) the plat_data->output_port
3319 		 * field isn't set, so it's safe to make this a fatal error.
3320 		 */
3321 		dev_err(hdmi->dev, "Missing endpoint in port@%u\n",
3322 			hdmi->plat_data->output_port);
3323 		return -ENODEV;
3324 	}
3325 
3326 	remote = of_graph_get_remote_port_parent(endpoint);
3327 	of_node_put(endpoint);
3328 	if (!remote) {
3329 		dev_err(hdmi->dev, "Endpoint in port@%u unconnected\n",
3330 			hdmi->plat_data->output_port);
3331 		return -ENODEV;
3332 	}
3333 
3334 	if (!of_device_is_available(remote)) {
3335 		dev_err(hdmi->dev, "port@%u remote device is disabled\n",
3336 			hdmi->plat_data->output_port);
3337 		of_node_put(remote);
3338 		return -ENODEV;
3339 	}
3340 
3341 	hdmi->next_bridge = of_drm_find_bridge(remote);
3342 	of_node_put(remote);
3343 	if (!hdmi->next_bridge)
3344 		return -EPROBE_DEFER;
3345 
3346 	return 0;
3347 }
3348 
3349 struct dw_hdmi *dw_hdmi_probe(struct platform_device *pdev,
3350 			      const struct dw_hdmi_plat_data *plat_data)
3351 {
3352 	struct device *dev = &pdev->dev;
3353 	struct device_node *np = dev->of_node;
3354 	struct platform_device_info pdevinfo;
3355 	struct device_node *ddc_node;
3356 	struct dw_hdmi_cec_data cec;
3357 	struct dw_hdmi *hdmi;
3358 	struct resource *iores = NULL;
3359 	int irq;
3360 	int ret;
3361 	u32 val = 1;
3362 	u8 prod_id0;
3363 	u8 prod_id1;
3364 	u8 config0;
3365 	u8 config3;
3366 
3367 	hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL);
3368 	if (!hdmi)
3369 		return ERR_PTR(-ENOMEM);
3370 
3371 	hdmi->plat_data = plat_data;
3372 	hdmi->dev = dev;
3373 	hdmi->sample_rate = 48000;
3374 	hdmi->channels = 2;
3375 	hdmi->disabled = true;
3376 	hdmi->rxsense = true;
3377 	hdmi->phy_mask = (u8)~(HDMI_PHY_HPD | HDMI_PHY_RX_SENSE);
3378 	hdmi->mc_clkdis = 0x7f;
3379 	hdmi->last_connector_result = connector_status_disconnected;
3380 
3381 	mutex_init(&hdmi->mutex);
3382 	mutex_init(&hdmi->audio_mutex);
3383 	mutex_init(&hdmi->cec_notifier_mutex);
3384 	spin_lock_init(&hdmi->audio_lock);
3385 
3386 	ret = dw_hdmi_parse_dt(hdmi);
3387 	if (ret < 0)
3388 		return ERR_PTR(ret);
3389 
3390 	ddc_node = of_parse_phandle(np, "ddc-i2c-bus", 0);
3391 	if (ddc_node) {
3392 		hdmi->ddc = of_get_i2c_adapter_by_node(ddc_node);
3393 		of_node_put(ddc_node);
3394 		if (!hdmi->ddc) {
3395 			dev_dbg(hdmi->dev, "failed to read ddc node\n");
3396 			return ERR_PTR(-EPROBE_DEFER);
3397 		}
3398 
3399 	} else {
3400 		dev_dbg(hdmi->dev, "no ddc property found\n");
3401 	}
3402 
3403 	if (!plat_data->regm) {
3404 		const struct regmap_config *reg_config;
3405 
3406 		of_property_read_u32(np, "reg-io-width", &val);
3407 		switch (val) {
3408 		case 4:
3409 			reg_config = &hdmi_regmap_32bit_config;
3410 			hdmi->reg_shift = 2;
3411 			break;
3412 		case 1:
3413 			reg_config = &hdmi_regmap_8bit_config;
3414 			break;
3415 		default:
3416 			dev_err(dev, "reg-io-width must be 1 or 4\n");
3417 			return ERR_PTR(-EINVAL);
3418 		}
3419 
3420 		iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
3421 		hdmi->regs = devm_ioremap_resource(dev, iores);
3422 		if (IS_ERR(hdmi->regs)) {
3423 			ret = PTR_ERR(hdmi->regs);
3424 			goto err_res;
3425 		}
3426 
3427 		hdmi->regm = devm_regmap_init_mmio(dev, hdmi->regs, reg_config);
3428 		if (IS_ERR(hdmi->regm)) {
3429 			dev_err(dev, "Failed to configure regmap\n");
3430 			ret = PTR_ERR(hdmi->regm);
3431 			goto err_res;
3432 		}
3433 	} else {
3434 		hdmi->regm = plat_data->regm;
3435 	}
3436 
3437 	hdmi->isfr_clk = devm_clk_get(hdmi->dev, "isfr");
3438 	if (IS_ERR(hdmi->isfr_clk)) {
3439 		ret = PTR_ERR(hdmi->isfr_clk);
3440 		dev_err(hdmi->dev, "Unable to get HDMI isfr clk: %d\n", ret);
3441 		goto err_res;
3442 	}
3443 
3444 	ret = clk_prepare_enable(hdmi->isfr_clk);
3445 	if (ret) {
3446 		dev_err(hdmi->dev, "Cannot enable HDMI isfr clock: %d\n", ret);
3447 		goto err_res;
3448 	}
3449 
3450 	hdmi->iahb_clk = devm_clk_get(hdmi->dev, "iahb");
3451 	if (IS_ERR(hdmi->iahb_clk)) {
3452 		ret = PTR_ERR(hdmi->iahb_clk);
3453 		dev_err(hdmi->dev, "Unable to get HDMI iahb clk: %d\n", ret);
3454 		goto err_isfr;
3455 	}
3456 
3457 	ret = clk_prepare_enable(hdmi->iahb_clk);
3458 	if (ret) {
3459 		dev_err(hdmi->dev, "Cannot enable HDMI iahb clock: %d\n", ret);
3460 		goto err_isfr;
3461 	}
3462 
3463 	hdmi->cec_clk = devm_clk_get(hdmi->dev, "cec");
3464 	if (PTR_ERR(hdmi->cec_clk) == -ENOENT) {
3465 		hdmi->cec_clk = NULL;
3466 	} else if (IS_ERR(hdmi->cec_clk)) {
3467 		ret = PTR_ERR(hdmi->cec_clk);
3468 		if (ret != -EPROBE_DEFER)
3469 			dev_err(hdmi->dev, "Cannot get HDMI cec clock: %d\n",
3470 				ret);
3471 
3472 		hdmi->cec_clk = NULL;
3473 		goto err_iahb;
3474 	} else {
3475 		ret = clk_prepare_enable(hdmi->cec_clk);
3476 		if (ret) {
3477 			dev_err(hdmi->dev, "Cannot enable HDMI cec clock: %d\n",
3478 				ret);
3479 			goto err_iahb;
3480 		}
3481 	}
3482 
3483 	/* Product and revision IDs */
3484 	hdmi->version = (hdmi_readb(hdmi, HDMI_DESIGN_ID) << 8)
3485 		      | (hdmi_readb(hdmi, HDMI_REVISION_ID) << 0);
3486 	prod_id0 = hdmi_readb(hdmi, HDMI_PRODUCT_ID0);
3487 	prod_id1 = hdmi_readb(hdmi, HDMI_PRODUCT_ID1);
3488 
3489 	if (prod_id0 != HDMI_PRODUCT_ID0_HDMI_TX ||
3490 	    (prod_id1 & ~HDMI_PRODUCT_ID1_HDCP) != HDMI_PRODUCT_ID1_HDMI_TX) {
3491 		dev_err(dev, "Unsupported HDMI controller (%04x:%02x:%02x)\n",
3492 			hdmi->version, prod_id0, prod_id1);
3493 		ret = -ENODEV;
3494 		goto err_iahb;
3495 	}
3496 
3497 	ret = dw_hdmi_detect_phy(hdmi);
3498 	if (ret < 0)
3499 		goto err_iahb;
3500 
3501 	dev_info(dev, "Detected HDMI TX controller v%x.%03x %s HDCP (%s)\n",
3502 		 hdmi->version >> 12, hdmi->version & 0xfff,
3503 		 prod_id1 & HDMI_PRODUCT_ID1_HDCP ? "with" : "without",
3504 		 hdmi->phy.name);
3505 
3506 	dw_hdmi_init_hw(hdmi);
3507 
3508 	irq = platform_get_irq(pdev, 0);
3509 	if (irq < 0) {
3510 		ret = irq;
3511 		goto err_iahb;
3512 	}
3513 
3514 	ret = devm_request_threaded_irq(dev, irq, dw_hdmi_hardirq,
3515 					dw_hdmi_irq, IRQF_SHARED,
3516 					dev_name(dev), hdmi);
3517 	if (ret)
3518 		goto err_iahb;
3519 
3520 	/*
3521 	 * To prevent overflows in HDMI_IH_FC_STAT2, set the clk regenerator
3522 	 * N and cts values before enabling phy
3523 	 */
3524 	hdmi_init_clk_regenerator(hdmi);
3525 
3526 	/* If DDC bus is not specified, try to register HDMI I2C bus */
3527 	if (!hdmi->ddc) {
3528 		/* Look for (optional) stuff related to unwedging */
3529 		hdmi->pinctrl = devm_pinctrl_get(dev);
3530 		if (!IS_ERR(hdmi->pinctrl)) {
3531 			hdmi->unwedge_state =
3532 				pinctrl_lookup_state(hdmi->pinctrl, "unwedge");
3533 			hdmi->default_state =
3534 				pinctrl_lookup_state(hdmi->pinctrl, "default");
3535 
3536 			if (IS_ERR(hdmi->default_state) ||
3537 			    IS_ERR(hdmi->unwedge_state)) {
3538 				if (!IS_ERR(hdmi->unwedge_state))
3539 					dev_warn(dev,
3540 						 "Unwedge requires default pinctrl\n");
3541 				hdmi->default_state = NULL;
3542 				hdmi->unwedge_state = NULL;
3543 			}
3544 		}
3545 
3546 		hdmi->ddc = dw_hdmi_i2c_adapter(hdmi);
3547 		if (IS_ERR(hdmi->ddc))
3548 			hdmi->ddc = NULL;
3549 	}
3550 
3551 	hdmi->bridge.driver_private = hdmi;
3552 	hdmi->bridge.funcs = &dw_hdmi_bridge_funcs;
3553 	hdmi->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID
3554 			 | DRM_BRIDGE_OP_HPD;
3555 	hdmi->bridge.interlace_allowed = true;
3556 #ifdef CONFIG_OF
3557 	hdmi->bridge.of_node = pdev->dev.of_node;
3558 #endif
3559 
3560 	memset(&pdevinfo, 0, sizeof(pdevinfo));
3561 	pdevinfo.parent = dev;
3562 	pdevinfo.id = PLATFORM_DEVID_AUTO;
3563 
3564 	config0 = hdmi_readb(hdmi, HDMI_CONFIG0_ID);
3565 	config3 = hdmi_readb(hdmi, HDMI_CONFIG3_ID);
3566 
3567 	if (iores && config3 & HDMI_CONFIG3_AHBAUDDMA) {
3568 		struct dw_hdmi_audio_data audio;
3569 
3570 		audio.phys = iores->start;
3571 		audio.base = hdmi->regs;
3572 		audio.irq = irq;
3573 		audio.hdmi = hdmi;
3574 		audio.get_eld = hdmi_audio_get_eld;
3575 		hdmi->enable_audio = dw_hdmi_ahb_audio_enable;
3576 		hdmi->disable_audio = dw_hdmi_ahb_audio_disable;
3577 
3578 		pdevinfo.name = "dw-hdmi-ahb-audio";
3579 		pdevinfo.data = &audio;
3580 		pdevinfo.size_data = sizeof(audio);
3581 		pdevinfo.dma_mask = DMA_BIT_MASK(32);
3582 		hdmi->audio = platform_device_register_full(&pdevinfo);
3583 	} else if (config0 & HDMI_CONFIG0_I2S) {
3584 		struct dw_hdmi_i2s_audio_data audio;
3585 
3586 		audio.hdmi	= hdmi;
3587 		audio.get_eld	= hdmi_audio_get_eld;
3588 		audio.write	= hdmi_writeb;
3589 		audio.read	= hdmi_readb;
3590 		hdmi->enable_audio = dw_hdmi_i2s_audio_enable;
3591 		hdmi->disable_audio = dw_hdmi_i2s_audio_disable;
3592 
3593 		pdevinfo.name = "dw-hdmi-i2s-audio";
3594 		pdevinfo.data = &audio;
3595 		pdevinfo.size_data = sizeof(audio);
3596 		pdevinfo.dma_mask = DMA_BIT_MASK(32);
3597 		hdmi->audio = platform_device_register_full(&pdevinfo);
3598 	} else if (iores && config3 & HDMI_CONFIG3_GPAUD) {
3599 		struct dw_hdmi_audio_data audio;
3600 
3601 		audio.phys = iores->start;
3602 		audio.base = hdmi->regs;
3603 		audio.irq = irq;
3604 		audio.hdmi = hdmi;
3605 		audio.get_eld = hdmi_audio_get_eld;
3606 
3607 		hdmi->enable_audio = dw_hdmi_gp_audio_enable;
3608 		hdmi->disable_audio = dw_hdmi_gp_audio_disable;
3609 
3610 		pdevinfo.name = "dw-hdmi-gp-audio";
3611 		pdevinfo.id = PLATFORM_DEVID_NONE;
3612 		pdevinfo.data = &audio;
3613 		pdevinfo.size_data = sizeof(audio);
3614 		pdevinfo.dma_mask = DMA_BIT_MASK(32);
3615 		hdmi->audio = platform_device_register_full(&pdevinfo);
3616 	}
3617 
3618 	if (!plat_data->disable_cec && (config0 & HDMI_CONFIG0_CEC)) {
3619 		cec.hdmi = hdmi;
3620 		cec.ops = &dw_hdmi_cec_ops;
3621 		cec.irq = irq;
3622 
3623 		pdevinfo.name = "dw-hdmi-cec";
3624 		pdevinfo.data = &cec;
3625 		pdevinfo.size_data = sizeof(cec);
3626 		pdevinfo.dma_mask = 0;
3627 
3628 		hdmi->cec = platform_device_register_full(&pdevinfo);
3629 	}
3630 
3631 	drm_bridge_add(&hdmi->bridge);
3632 
3633 	return hdmi;
3634 
3635 err_iahb:
3636 	clk_disable_unprepare(hdmi->iahb_clk);
3637 	clk_disable_unprepare(hdmi->cec_clk);
3638 err_isfr:
3639 	clk_disable_unprepare(hdmi->isfr_clk);
3640 err_res:
3641 	i2c_put_adapter(hdmi->ddc);
3642 
3643 	return ERR_PTR(ret);
3644 }
3645 EXPORT_SYMBOL_GPL(dw_hdmi_probe);
3646 
3647 void dw_hdmi_remove(struct dw_hdmi *hdmi)
3648 {
3649 	drm_bridge_remove(&hdmi->bridge);
3650 
3651 	if (hdmi->audio && !IS_ERR(hdmi->audio))
3652 		platform_device_unregister(hdmi->audio);
3653 	if (!IS_ERR(hdmi->cec))
3654 		platform_device_unregister(hdmi->cec);
3655 
3656 	/* Disable all interrupts */
3657 	hdmi_writeb(hdmi, ~0, HDMI_IH_MUTE_PHY_STAT0);
3658 
3659 	clk_disable_unprepare(hdmi->iahb_clk);
3660 	clk_disable_unprepare(hdmi->isfr_clk);
3661 	clk_disable_unprepare(hdmi->cec_clk);
3662 
3663 	if (hdmi->i2c)
3664 		i2c_del_adapter(&hdmi->i2c->adap);
3665 	else
3666 		i2c_put_adapter(hdmi->ddc);
3667 }
3668 EXPORT_SYMBOL_GPL(dw_hdmi_remove);
3669 
3670 /* -----------------------------------------------------------------------------
3671  * Bind/unbind API, used from platforms based on the component framework.
3672  */
3673 struct dw_hdmi *dw_hdmi_bind(struct platform_device *pdev,
3674 			     struct drm_encoder *encoder,
3675 			     const struct dw_hdmi_plat_data *plat_data)
3676 {
3677 	struct dw_hdmi *hdmi;
3678 	int ret;
3679 
3680 	hdmi = dw_hdmi_probe(pdev, plat_data);
3681 	if (IS_ERR(hdmi))
3682 		return hdmi;
3683 
3684 	ret = drm_bridge_attach(encoder, &hdmi->bridge, NULL, 0);
3685 	if (ret) {
3686 		dw_hdmi_remove(hdmi);
3687 		return ERR_PTR(ret);
3688 	}
3689 
3690 	return hdmi;
3691 }
3692 EXPORT_SYMBOL_GPL(dw_hdmi_bind);
3693 
3694 void dw_hdmi_unbind(struct dw_hdmi *hdmi)
3695 {
3696 	dw_hdmi_remove(hdmi);
3697 }
3698 EXPORT_SYMBOL_GPL(dw_hdmi_unbind);
3699 
3700 void dw_hdmi_resume(struct dw_hdmi *hdmi)
3701 {
3702 	dw_hdmi_init_hw(hdmi);
3703 }
3704 EXPORT_SYMBOL_GPL(dw_hdmi_resume);
3705 
3706 MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
3707 MODULE_AUTHOR("Andy Yan <andy.yan@rock-chips.com>");
3708 MODULE_AUTHOR("Yakir Yang <ykk@rock-chips.com>");
3709 MODULE_AUTHOR("Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>");
3710 MODULE_DESCRIPTION("DW HDMI transmitter driver");
3711 MODULE_LICENSE("GPL");
3712 MODULE_ALIAS("platform:dw-hdmi");
3713