drivers/gpu/drm/bridge/synopsys/dw-hdmi.c

   1 /*
   2  * DesignWare High-Definition Multimedia Interface (HDMI) driver
   3  *
   4  * Copyright (C) 2013-2015 Mentor Graphics Inc.
   5  * Copyright (C) 2011-2013 Freescale Semiconductor, Inc.
   6  * Copyright (C) 2010, Guennadi Liakhovetski <[email protected]>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  */
  14 #include <linux/module.h>
  15 #include <linux/irq.h>
  16 #include <linux/delay.h>
  17 #include <linux/err.h>
  18 #include <linux/clk.h>
  19 #include <linux/hdmi.h>
  20 #include <linux/mutex.h>
  21 #include <linux/of_device.h>
  22 #include <linux/regmap.h>
  23 #include <linux/spinlock.h>
  24
  25 #include <drm/drm_of.h>
  26 #include <drm/drmP.h>
  27 #include <drm/drm_atomic_helper.h>
  28 #include <drm/drm_crtc_helper.h>
  29 #include <drm/drm_edid.h>
  30 #include <drm/drm_encoder_slave.h>
  31 #include <drm/bridge/dw_hdmi.h>
  32
  33 #include <uapi/linux/media-bus-format.h>
  34 #include <uapi/linux/videodev2.h>
  35
  36 #include "dw-hdmi.h"
  37 #include "dw-hdmi-audio.h"
  38 #include "dw-hdmi-cec.h"
  39
  40 #include <media/cec-notifier.h>
  41
  42 #define DDC_SEGMENT_ADDR        0x30
  43
  44 #define HDMI_EDID_LEN           512
  45
  46 enum hdmi_datamap {
  47         RGB444_8B = 0x01,
  48         RGB444_10B = 0x03,
  49         RGB444_12B = 0x05,
  50         RGB444_16B = 0x07,
  51         YCbCr444_8B = 0x09,
  52         YCbCr444_10B = 0x0B,
  53         YCbCr444_12B = 0x0D,
  54         YCbCr444_16B = 0x0F,
  55         YCbCr422_8B = 0x16,
  56         YCbCr422_10B = 0x14,
  57         YCbCr422_12B = 0x12,
  58 };
  59
  60 static const u16 csc_coeff_default[3][4] = {
  61         { 0x2000, 0x0000, 0x0000, 0x0000 },
  62         { 0x0000, 0x2000, 0x0000, 0x0000 },
  63         { 0x0000, 0x0000, 0x2000, 0x0000 }
  64 };
  65
  66 static const u16 csc_coeff_rgb_out_eitu601[3][4] = {
  67         { 0x2000, 0x6926, 0x74fd, 0x010e },
  68         { 0x2000, 0x2cdd, 0x0000, 0x7e9a },
  69         { 0x2000, 0x0000, 0x38b4, 0x7e3b }
  70 };
  71
  72 static const u16 csc_coeff_rgb_out_eitu709[3][4] = {
  73         { 0x2000, 0x7106, 0x7a02, 0x00a7 },
  74         { 0x2000, 0x3264, 0x0000, 0x7e6d },
  75         { 0x2000, 0x0000, 0x3b61, 0x7e25 }
  76 };
  77
  78 static const u16 csc_coeff_rgb_in_eitu601[3][4] = {
  79         { 0x2591, 0x1322, 0x074b, 0x0000 },
  80         { 0x6535, 0x2000, 0x7acc, 0x0200 },
  81         { 0x6acd, 0x7534, 0x2000, 0x0200 }
  82 };
  83
  84 static const u16 csc_coeff_rgb_in_eitu709[3][4] = {
  85         { 0x2dc5, 0x0d9b, 0x049e, 0x0000 },
  86         { 0x62f0, 0x2000, 0x7d11, 0x0200 },
  87         { 0x6756, 0x78ab, 0x2000, 0x0200 }
  88 };
  89
  90 struct hdmi_vmode {
  91         bool mdataenablepolarity;
  92
  93         unsigned int mpixelclock;
  94         unsigned int mpixelrepetitioninput;
  95         unsigned int mpixelrepetitionoutput;
  96 };
  97
  98 struct hdmi_data_info {
  99         unsigned int enc_in_bus_format;
 100         unsigned int enc_out_bus_format;
 101         unsigned int enc_in_encoding;
 102         unsigned int enc_out_encoding;
 103         unsigned int pix_repet_factor;
 104         unsigned int hdcp_enable;
 105         struct hdmi_vmode video_mode;
 106 };
 107
 108 struct dw_hdmi_i2c {
 109         struct i2c_adapter      adap;
 110
 111         struct mutex            lock;   /* used to serialize data transfers */
 112         struct completion       cmp;
 113         u8                      stat;
 114
 115         u8                      slave_reg;
 116         bool                    is_regaddr;
 117         bool                    is_segment;
 118 };
 119
 120 struct dw_hdmi_phy_data {
 121         enum dw_hdmi_phy_type type;
 122         const char *name;
 123         unsigned int gen;
 124         bool has_svsret;
 125         int (*configure)(struct dw_hdmi *hdmi,
 126                          const struct dw_hdmi_plat_data *pdata,
 127                          unsigned long mpixelclock);
 128 };
 129
 130 struct dw_hdmi {
 131         struct drm_connector connector;
 132         struct drm_bridge bridge;
 133
 134         unsigned int version;
 135
 136         struct platform_device *audio;
 137         struct platform_device *cec;
 138         struct device *dev;
 139         struct clk *isfr_clk;
 140         struct clk *iahb_clk;
 141         struct clk *cec_clk;
 142         struct dw_hdmi_i2c *i2c;
 143
 144         struct hdmi_data_info hdmi_data;
 145         const struct dw_hdmi_plat_data *plat_data;
 146
 147         int vic;
 148
 149         u8 edid[HDMI_EDID_LEN];
 150
 151         struct {
 152                 const struct dw_hdmi_phy_ops *ops;
 153                 const char *name;
 154                 void *data;
 155                 bool enabled;
 156         } phy;
 157
 158         struct drm_display_mode previous_mode;
 159
 160         struct i2c_adapter *ddc;
 161         void __iomem *regs;
 162         bool sink_is_hdmi;
 163         bool sink_has_audio;
 164
 165         struct mutex mutex;             /* for state below and previous_mode */
 166         enum drm_connector_force force; /* mutex-protected force state */
 167         bool disabled;                  /* DRM has disabled our bridge */
 168         bool bridge_is_on;              /* indicates the bridge is on */
 169         bool rxsense;                   /* rxsense state */
 170         u8 phy_mask;                    /* desired phy int mask settings */
 171         u8 mc_clkdis;                   /* clock disable register */
 172
 173         spinlock_t audio_lock;
 174         struct mutex audio_mutex;
 175         unsigned int sample_rate;
 176         unsigned int audio_cts;
 177         unsigned int audio_n;
 178         bool audio_enable;
 179
 180         unsigned int reg_shift;
 181         struct regmap *regm;
 182         void (*enable_audio)(struct dw_hdmi *hdmi);
 183         void (*disable_audio)(struct dw_hdmi *hdmi);
 184
 185         struct cec_notifier *cec_notifier;
 186 };
 187
 188 #define HDMI_IH_PHY_STAT0_RX_SENSE \
 189         (HDMI_IH_PHY_STAT0_RX_SENSE0 | HDMI_IH_PHY_STAT0_RX_SENSE1 | \
 190          HDMI_IH_PHY_STAT0_RX_SENSE2 | HDMI_IH_PHY_STAT0_RX_SENSE3)
 191
 192 #define HDMI_PHY_RX_SENSE \
 193         (HDMI_PHY_RX_SENSE0 | HDMI_PHY_RX_SENSE1 | \
 194          HDMI_PHY_RX_SENSE2 | HDMI_PHY_RX_SENSE3)
 195
 196 static inline void hdmi_writeb(struct dw_hdmi *hdmi, u8 val, int offset)
 197 {
 198         regmap_write(hdmi->regm, offset << hdmi->reg_shift, val);
 199 }
 200
 201 static inline u8 hdmi_readb(struct dw_hdmi *hdmi, int offset)
 202 {
 203         unsigned int val = 0;
 204
 205         regmap_read(hdmi->regm, offset << hdmi->reg_shift, &val);
 206
 207         return val;
 208 }
 209
 210 static void hdmi_modb(struct dw_hdmi *hdmi, u8 data, u8 mask, unsigned reg)
 211 {
 212         regmap_update_bits(hdmi->regm, reg << hdmi->reg_shift, mask, data);
 213 }
 214
 215 static void hdmi_mask_writeb(struct dw_hdmi *hdmi, u8 data, unsigned int reg,
 216                              u8 shift, u8 mask)
 217 {
 218         hdmi_modb(hdmi, data << shift, mask, reg);
 219 }
 220
 221 static void dw_hdmi_i2c_init(struct dw_hdmi *hdmi)
 222 {
 223         /* Software reset */
 224         hdmi_writeb(hdmi, 0x00, HDMI_I2CM_SOFTRSTZ);
 225
 226         /* Set Standard Mode speed (determined to be 100KHz on iMX6) */
 227         hdmi_writeb(hdmi, 0x00, HDMI_I2CM_DIV);
 228
 229         /* Set done, not acknowledged and arbitration interrupt polarities */
 230         hdmi_writeb(hdmi, HDMI_I2CM_INT_DONE_POL, HDMI_I2CM_INT);
 231         hdmi_writeb(hdmi, HDMI_I2CM_CTLINT_NAC_POL | HDMI_I2CM_CTLINT_ARB_POL,
 232                     HDMI_I2CM_CTLINT);
 233
 234         /* Clear DONE and ERROR interrupts */
 235         hdmi_writeb(hdmi, HDMI_IH_I2CM_STAT0_ERROR | HDMI_IH_I2CM_STAT0_DONE,
 236                     HDMI_IH_I2CM_STAT0);
 237
 238         /* Mute DONE and ERROR interrupts */
 239         hdmi_writeb(hdmi, HDMI_IH_I2CM_STAT0_ERROR | HDMI_IH_I2CM_STAT0_DONE,
 240                     HDMI_IH_MUTE_I2CM_STAT0);
 241 }
 242
 243 static int dw_hdmi_i2c_read(struct dw_hdmi *hdmi,
 244                             unsigned char *buf, unsigned int length)
 245 {
 246         struct dw_hdmi_i2c *i2c = hdmi->i2c;
 247         int stat;
 248
 249         if (!i2c->is_regaddr) {
 250                 dev_dbg(hdmi->dev, "set read register address to 0\n");
 251                 i2c->slave_reg = 0x00;
 252                 i2c->is_regaddr = true;
 253         }
 254
 255         while (length--) {
 256                 reinit_completion(&i2c->cmp);
 257
 258                 hdmi_writeb(hdmi, i2c->slave_reg++, HDMI_I2CM_ADDRESS);
 259                 if (i2c->is_segment)
 260                         hdmi_writeb(hdmi, HDMI_I2CM_OPERATION_READ_EXT,
 261                                     HDMI_I2CM_OPERATION);
 262                 else
 263                         hdmi_writeb(hdmi, HDMI_I2CM_OPERATION_READ,
 264                                     HDMI_I2CM_OPERATION);
 265
 266                 stat = wait_for_completion_timeout(&i2c->cmp, HZ / 10);
 267                 if (!stat)
 268                         return -EAGAIN;
 269
 270                 /* Check for error condition on the bus */
 271                 if (i2c->stat & HDMI_IH_I2CM_STAT0_ERROR)
 272                         return -EIO;
 273
 274                 *buf++ = hdmi_readb(hdmi, HDMI_I2CM_DATAI);
 275         }
 276         i2c->is_segment = false;
 277
 278         return 0;
 279 }
 280
 281 static int dw_hdmi_i2c_write(struct dw_hdmi *hdmi,
 282                              unsigned char *buf, unsigned int length)
 283 {
 284         struct dw_hdmi_i2c *i2c = hdmi->i2c;
 285         int stat;
 286
 287         if (!i2c->is_regaddr) {
 288                 /* Use the first write byte as register address */
 289                 i2c->slave_reg = buf[0];
 290                 length--;
 291                 buf++;
 292                 i2c->is_regaddr = true;
 293         }
 294
 295         while (length--) {
 296                 reinit_completion(&i2c->cmp);
 297
 298                 hdmi_writeb(hdmi, *buf++, HDMI_I2CM_DATAO);
 299                 hdmi_writeb(hdmi, i2c->slave_reg++, HDMI_I2CM_ADDRESS);
 300                 hdmi_writeb(hdmi, HDMI_I2CM_OPERATION_WRITE,
 301                             HDMI_I2CM_OPERATION);
 302
 303                 stat = wait_for_completion_timeout(&i2c->cmp, HZ / 10);
 304                 if (!stat)
 305                         return -EAGAIN;
 306
 307                 /* Check for error condition on the bus */
 308                 if (i2c->stat & HDMI_IH_I2CM_STAT0_ERROR)
 309                         return -EIO;
 310         }
 311
 312         return 0;
 313 }
 314
 315 static int dw_hdmi_i2c_xfer(struct i2c_adapter *adap,
 316                             struct i2c_msg *msgs, int num)
 317 {
 318         struct dw_hdmi *hdmi = i2c_get_adapdata(adap);
 319         struct dw_hdmi_i2c *i2c = hdmi->i2c;
 320         u8 addr = msgs[0].addr;
 321         int i, ret = 0;
 322
 323         dev_dbg(hdmi->dev, "xfer: num: %d, addr: %#x\n", num, addr);
 324
 325         for (i = 0; i < num; i++) {
 326                 if (msgs[i].len == 0) {
 327                         dev_dbg(hdmi->dev,
 328                                 "unsupported transfer %d/%d, no data\n",
 329                                 i + 1, num);
 330                         return -EOPNOTSUPP;
 331                 }
 332         }
 333
 334         mutex_lock(&i2c->lock);
 335
 336         /* Unmute DONE and ERROR interrupts */
 337         hdmi_writeb(hdmi, 0x00, HDMI_IH_MUTE_I2CM_STAT0);
 338
 339         /* Set slave device address taken from the first I2C message */
 340         hdmi_writeb(hdmi, addr, HDMI_I2CM_SLAVE);
 341
 342         /* Set slave device register address on transfer */
 343         i2c->is_regaddr = false;
 344
 345         /* Set segment pointer for I2C extended read mode operation */
 346         i2c->is_segment = false;
 347
 348         for (i = 0; i < num; i++) {
 349                 dev_dbg(hdmi->dev, "xfer: num: %d/%d, len: %d, flags: %#x\n",
 350                         i + 1, num, msgs[i].len, msgs[i].flags);
 351                 if (msgs[i].addr == DDC_SEGMENT_ADDR && msgs[i].len == 1) {
 352                         i2c->is_segment = true;
 353                         hdmi_writeb(hdmi, DDC_SEGMENT_ADDR, HDMI_I2CM_SEGADDR);
 354                         hdmi_writeb(hdmi, *msgs[i].buf, HDMI_I2CM_SEGPTR);
 355                 } else {
 356                         if (msgs[i].flags & I2C_M_RD)
 357                                 ret = dw_hdmi_i2c_read(hdmi, msgs[i].buf,
 358                                                        msgs[i].len);
 359                         else
 360                                 ret = dw_hdmi_i2c_write(hdmi, msgs[i].buf,
 361                                                         msgs[i].len);
 362                 }
 363                 if (ret < 0)
 364                         break;
 365         }
 366
 367         if (!ret)
 368                 ret = num;
 369
 370         /* Mute DONE and ERROR interrupts */
 371         hdmi_writeb(hdmi, HDMI_IH_I2CM_STAT0_ERROR | HDMI_IH_I2CM_STAT0_DONE,
 372                     HDMI_IH_MUTE_I2CM_STAT0);
 373
 374         mutex_unlock(&i2c->lock);
 375
 376         return ret;
 377 }
 378
 379 static u32 dw_hdmi_i2c_func(struct i2c_adapter *adapter)
 380 {
 381         return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
 382 }
 383
 384 static const struct i2c_algorithm dw_hdmi_algorithm = {
 385         .master_xfer    = dw_hdmi_i2c_xfer,
 386         .functionality  = dw_hdmi_i2c_func,
 387 };
 388
 389 static struct i2c_adapter *dw_hdmi_i2c_adapter(struct dw_hdmi *hdmi)
 390 {
 391         struct i2c_adapter *adap;
 392         struct dw_hdmi_i2c *i2c;
 393         int ret;
 394
 395         i2c = devm_kzalloc(hdmi->dev, sizeof(*i2c), GFP_KERNEL);
 396         if (!i2c)
 397                 return ERR_PTR(-ENOMEM);
 398
 399         mutex_init(&i2c->lock);
 400         init_completion(&i2c->cmp);
 401
 402         adap = &i2c->adap;
 403         adap->class = I2C_CLASS_DDC;
 404         adap->owner = THIS_MODULE;
 405         adap->dev.parent = hdmi->dev;
 406         adap->algo = &dw_hdmi_algorithm;
 407         strlcpy(adap->name, "DesignWare HDMI", sizeof(adap->name));
 408         i2c_set_adapdata(adap, hdmi);
 409
 410         ret = i2c_add_adapter(adap);
 411         if (ret) {
 412                 dev_warn(hdmi->dev, "cannot add %s I2C adapter\n", adap->name);
 413                 devm_kfree(hdmi->dev, i2c);
 414                 return ERR_PTR(ret);
 415         }
 416
 417         hdmi->i2c = i2c;
 418
 419         dev_info(hdmi->dev, "registered %s I2C bus driver\n", adap->name);
 420
 421         return adap;
 422 }
 423
 424 static void hdmi_set_cts_n(struct dw_hdmi *hdmi, unsigned int cts,
 425                            unsigned int n)
 426 {
 427         /* Must be set/cleared first */
 428         hdmi_modb(hdmi, 0, HDMI_AUD_CTS3_CTS_MANUAL, HDMI_AUD_CTS3);
 429
 430         /* nshift factor = 0 */
 431         hdmi_modb(hdmi, 0, HDMI_AUD_CTS3_N_SHIFT_MASK, HDMI_AUD_CTS3);
 432
 433         hdmi_writeb(hdmi, ((cts >> 16) & HDMI_AUD_CTS3_AUDCTS19_16_MASK) |
 434                     HDMI_AUD_CTS3_CTS_MANUAL, HDMI_AUD_CTS3);
 435         hdmi_writeb(hdmi, (cts >> 8) & 0xff, HDMI_AUD_CTS2);
 436         hdmi_writeb(hdmi, cts & 0xff, HDMI_AUD_CTS1);
 437
 438         hdmi_writeb(hdmi, (n >> 16) & 0x0f, HDMI_AUD_N3);
 439         hdmi_writeb(hdmi, (n >> 8) & 0xff, HDMI_AUD_N2);
 440         hdmi_writeb(hdmi, n & 0xff, HDMI_AUD_N1);
 441 }
 442
 443 static unsigned int hdmi_compute_n(unsigned int freq, unsigned long pixel_clk)
 444 {
 445         unsigned int n = (128 * freq) / 1000;
 446         unsigned int mult = 1;
 447
 448         while (freq > 48000) {
 449                 mult *= 2;
 450                 freq /= 2;
 451         }
 452
 453         switch (freq) {
 454         case 32000:
 455                 if (pixel_clk == 25175000)
 456                         n = 4576;
 457                 else if (pixel_clk == 27027000)
 458                         n = 4096;
 459                 else if (pixel_clk == 74176000 || pixel_clk == 148352000)
 460                         n = 11648;
 461                 else
 462                         n = 4096;
 463                 n *= mult;
 464                 break;
 465
 466         case 44100:
 467                 if (pixel_clk == 25175000)
 468                         n = 7007;
 469                 else if (pixel_clk == 74176000)
 470                         n = 17836;
 471                 else if (pixel_clk == 148352000)
 472                         n = 8918;
 473                 else
 474                         n = 6272;
 475                 n *= mult;
 476                 break;
 477
 478         case 48000:
 479                 if (pixel_clk == 25175000)
 480                         n = 6864;
 481                 else if (pixel_clk == 27027000)
 482                         n = 6144;
 483                 else if (pixel_clk == 74176000)
 484                         n = 11648;
 485                 else if (pixel_clk == 148352000)
 486                         n = 5824;
 487                 else
 488                         n = 6144;
 489                 n *= mult;
 490                 break;
 491
 492         default:
 493                 break;
 494         }
 495
 496         return n;
 497 }
 498
 499 static void hdmi_set_clk_regenerator(struct dw_hdmi *hdmi,
 500         unsigned long pixel_clk, unsigned int sample_rate)
 501 {
 502         unsigned long ftdms = pixel_clk;
 503         unsigned int n, cts;
 504         u64 tmp;
 505
 506         n = hdmi_compute_n(sample_rate, pixel_clk);
 507
 508         /*
 509          * Compute the CTS value from the N value.  Note that CTS and N
 510          * can be up to 20 bits in total, so we need 64-bit math.  Also
 511          * note that our TDMS clock is not fully accurate; it is accurate
 512          * to kHz.  This can introduce an unnecessary remainder in the
 513          * calculation below, so we don't try to warn about that.
 514          */
 515         tmp = (u64)ftdms * n;
 516         do_div(tmp, 128 * sample_rate);
 517         cts = tmp;
 518
 519         dev_dbg(hdmi->dev, "%s: fs=%uHz ftdms=%lu.%03luMHz N=%d cts=%d\n",
 520                 __func__, sample_rate, ftdms / 1000000, (ftdms / 1000) % 1000,
 521                 n, cts);
 522
 523         spin_lock_irq(&hdmi->audio_lock);
 524         hdmi->audio_n = n;
 525         hdmi->audio_cts = cts;
 526         hdmi_set_cts_n(hdmi, cts, hdmi->audio_enable ? n : 0);
 527         spin_unlock_irq(&hdmi->audio_lock);
 528 }
 529
 530 static void hdmi_init_clk_regenerator(struct dw_hdmi *hdmi)
 531 {
 532         mutex_lock(&hdmi->audio_mutex);
 533         hdmi_set_clk_regenerator(hdmi, 74250000, hdmi->sample_rate);
 534         mutex_unlock(&hdmi->audio_mutex);
 535 }
 536
 537 static void hdmi_clk_regenerator_update_pixel_clock(struct dw_hdmi *hdmi)
 538 {
 539         mutex_lock(&hdmi->audio_mutex);
 540         hdmi_set_clk_regenerator(hdmi, hdmi->hdmi_data.video_mode.mpixelclock,
 541                                  hdmi->sample_rate);
 542         mutex_unlock(&hdmi->audio_mutex);
 543 }
 544
 545 void dw_hdmi_set_sample_rate(struct dw_hdmi *hdmi, unsigned int rate)
 546 {
 547         mutex_lock(&hdmi->audio_mutex);
 548         hdmi->sample_rate = rate;
 549         hdmi_set_clk_regenerator(hdmi, hdmi->hdmi_data.video_mode.mpixelclock,
 550                                  hdmi->sample_rate);
 551         mutex_unlock(&hdmi->audio_mutex);
 552 }
 553 EXPORT_SYMBOL_GPL(dw_hdmi_set_sample_rate);
 554
 555 static void hdmi_enable_audio_clk(struct dw_hdmi *hdmi, bool enable)
 556 {
 557         if (enable)
 558                 hdmi->mc_clkdis &= ~HDMI_MC_CLKDIS_AUDCLK_DISABLE;
 559         else
 560                 hdmi->mc_clkdis |= HDMI_MC_CLKDIS_AUDCLK_DISABLE;
 561         hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS);
 562 }
 563
 564 static void dw_hdmi_ahb_audio_enable(struct dw_hdmi *hdmi)
 565 {
 566         hdmi_set_cts_n(hdmi, hdmi->audio_cts, hdmi->audio_n);
 567 }
 568
 569 static void dw_hdmi_ahb_audio_disable(struct dw_hdmi *hdmi)
 570 {
 571         hdmi_set_cts_n(hdmi, hdmi->audio_cts, 0);
 572 }
 573
 574 static void dw_hdmi_i2s_audio_enable(struct dw_hdmi *hdmi)
 575 {
 576         hdmi_set_cts_n(hdmi, hdmi->audio_cts, hdmi->audio_n);
 577         hdmi_enable_audio_clk(hdmi, true);
 578 }
 579
 580 static void dw_hdmi_i2s_audio_disable(struct dw_hdmi *hdmi)
 581 {
 582         hdmi_enable_audio_clk(hdmi, false);
 583 }
 584
 585 void dw_hdmi_audio_enable(struct dw_hdmi *hdmi)
 586 {
 587         unsigned long flags;
 588
 589         spin_lock_irqsave(&hdmi->audio_lock, flags);
 590         hdmi->audio_enable = true;
 591         if (hdmi->enable_audio)
 592                 hdmi->enable_audio(hdmi);
 593         spin_unlock_irqrestore(&hdmi->audio_lock, flags);
 594 }
 595 EXPORT_SYMBOL_GPL(dw_hdmi_audio_enable);
 596
 597 void dw_hdmi_audio_disable(struct dw_hdmi *hdmi)
 598 {
 599         unsigned long flags;
 600
 601         spin_lock_irqsave(&hdmi->audio_lock, flags);
 602         hdmi->audio_enable = false;
 603         if (hdmi->disable_audio)
 604                 hdmi->disable_audio(hdmi);
 605         spin_unlock_irqrestore(&hdmi->audio_lock, flags);
 606 }
 607 EXPORT_SYMBOL_GPL(dw_hdmi_audio_disable);
 608
 609 static bool hdmi_bus_fmt_is_rgb(unsigned int bus_format)
 610 {
 611         switch (bus_format) {
 612         case MEDIA_BUS_FMT_RGB888_1X24:
 613         case MEDIA_BUS_FMT_RGB101010_1X30:
 614         case MEDIA_BUS_FMT_RGB121212_1X36:
 615         case MEDIA_BUS_FMT_RGB161616_1X48:
 616                 return true;
 617
 618         default:
 619                 return false;
 620         }
 621 }
 622
 623 static bool hdmi_bus_fmt_is_yuv444(unsigned int bus_format)
 624 {
 625         switch (bus_format) {
 626         case MEDIA_BUS_FMT_YUV8_1X24:
 627         case MEDIA_BUS_FMT_YUV10_1X30:
 628         case MEDIA_BUS_FMT_YUV12_1X36:
 629         case MEDIA_BUS_FMT_YUV16_1X48:
 630                 return true;
 631
 632         default:
 633                 return false;
 634         }
 635 }
 636
 637 static bool hdmi_bus_fmt_is_yuv422(unsigned int bus_format)
 638 {
 639         switch (bus_format) {
 640         case MEDIA_BUS_FMT_UYVY8_1X16:
 641         case MEDIA_BUS_FMT_UYVY10_1X20:
 642         case MEDIA_BUS_FMT_UYVY12_1X24:
 643                 return true;
 644
 645         default:
 646                 return false;
 647         }
 648 }
 649
 650 static int hdmi_bus_fmt_color_depth(unsigned int bus_format)
 651 {
 652         switch (bus_format) {
 653         case MEDIA_BUS_FMT_RGB888_1X24:
 654         case MEDIA_BUS_FMT_YUV8_1X24:
 655         case MEDIA_BUS_FMT_UYVY8_1X16:
 656         case MEDIA_BUS_FMT_UYYVYY8_0_5X24:
 657                 return 8;
 658
 659         case MEDIA_BUS_FMT_RGB101010_1X30:
 660         case MEDIA_BUS_FMT_YUV10_1X30:
 661         case MEDIA_BUS_FMT_UYVY10_1X20:
 662         case MEDIA_BUS_FMT_UYYVYY10_0_5X30:
 663                 return 10;
 664
 665         case MEDIA_BUS_FMT_RGB121212_1X36:
 666         case MEDIA_BUS_FMT_YUV12_1X36:
 667         case MEDIA_BUS_FMT_UYVY12_1X24:
 668         case MEDIA_BUS_FMT_UYYVYY12_0_5X36:
 669                 return 12;
 670
 671         case MEDIA_BUS_FMT_RGB161616_1X48:
 672         case MEDIA_BUS_FMT_YUV16_1X48:
 673         case MEDIA_BUS_FMT_UYYVYY16_0_5X48:
 674                 return 16;
 675
 676         default:
 677                 return 0;
 678         }
 679 }
 680
 681 /*
 682  * this submodule is responsible for the video data synchronization.
 683  * for example, for RGB 4:4:4 input, the data map is defined as
 684  *                      pin{47~40} <==> R[7:0]
 685  *                      pin{31~24} <==> G[7:0]
 686  *                      pin{15~8}  <==> B[7:0]
 687  */
 688 static void hdmi_video_sample(struct dw_hdmi *hdmi)
 689 {
 690         int color_format = 0;
 691         u8 val;
 692
 693         switch (hdmi->hdmi_data.enc_in_bus_format) {
 694         case MEDIA_BUS_FMT_RGB888_1X24:
 695                 color_format = 0x01;
 696                 break;
 697         case MEDIA_BUS_FMT_RGB101010_1X30:
 698                 color_format = 0x03;
 699                 break;
 700         case MEDIA_BUS_FMT_RGB121212_1X36:
 701                 color_format = 0x05;
 702                 break;
 703         case MEDIA_BUS_FMT_RGB161616_1X48:
 704                 color_format = 0x07;
 705                 break;
 706
 707         case MEDIA_BUS_FMT_YUV8_1X24:
 708         case MEDIA_BUS_FMT_UYYVYY8_0_5X24:
 709                 color_format = 0x09;
 710                 break;
 711         case MEDIA_BUS_FMT_YUV10_1X30:
 712         case MEDIA_BUS_FMT_UYYVYY10_0_5X30:
 713                 color_format = 0x0B;
 714                 break;
 715         case MEDIA_BUS_FMT_YUV12_1X36:
 716         case MEDIA_BUS_FMT_UYYVYY12_0_5X36:
 717                 color_format = 0x0D;
 718                 break;
 719         case MEDIA_BUS_FMT_YUV16_1X48:
 720         case MEDIA_BUS_FMT_UYYVYY16_0_5X48:
 721                 color_format = 0x0F;
 722                 break;
 723
 724         case MEDIA_BUS_FMT_UYVY8_1X16:
 725                 color_format = 0x16;
 726                 break;
 727         case MEDIA_BUS_FMT_UYVY10_1X20:
 728                 color_format = 0x14;
 729                 break;
 730         case MEDIA_BUS_FMT_UYVY12_1X24:
 731                 color_format = 0x12;
 732                 break;
 733
 734         default:
 735                 return;
 736         }
 737
 738         val = HDMI_TX_INVID0_INTERNAL_DE_GENERATOR_DISABLE |
 739                 ((color_format << HDMI_TX_INVID0_VIDEO_MAPPING_OFFSET) &
 740                 HDMI_TX_INVID0_VIDEO_MAPPING_MASK);
 741         hdmi_writeb(hdmi, val, HDMI_TX_INVID0);
 742
 743         /* Enable TX stuffing: When DE is inactive, fix the output data to 0 */
 744         val = HDMI_TX_INSTUFFING_BDBDATA_STUFFING_ENABLE |
 745                 HDMI_TX_INSTUFFING_RCRDATA_STUFFING_ENABLE |
 746                 HDMI_TX_INSTUFFING_GYDATA_STUFFING_ENABLE;
 747         hdmi_writeb(hdmi, val, HDMI_TX_INSTUFFING);
 748         hdmi_writeb(hdmi, 0x0, HDMI_TX_GYDATA0);
 749         hdmi_writeb(hdmi, 0x0, HDMI_TX_GYDATA1);
 750         hdmi_writeb(hdmi, 0x0, HDMI_TX_RCRDATA0);
 751         hdmi_writeb(hdmi, 0x0, HDMI_TX_RCRDATA1);
 752         hdmi_writeb(hdmi, 0x0, HDMI_TX_BCBDATA0);
 753         hdmi_writeb(hdmi, 0x0, HDMI_TX_BCBDATA1);
 754 }
 755
 756 static int is_color_space_conversion(struct dw_hdmi *hdmi)
 757 {
 758         return hdmi->hdmi_data.enc_in_bus_format != hdmi->hdmi_data.enc_out_bus_format;
 759 }
 760
 761 static int is_color_space_decimation(struct dw_hdmi *hdmi)
 762 {
 763         if (!hdmi_bus_fmt_is_yuv422(hdmi->hdmi_data.enc_out_bus_format))
 764                 return 0;
 765
 766         if (hdmi_bus_fmt_is_rgb(hdmi->hdmi_data.enc_in_bus_format) ||
 767             hdmi_bus_fmt_is_yuv444(hdmi->hdmi_data.enc_in_bus_format))
 768                 return 1;
 769
 770         return 0;
 771 }
 772
 773 static int is_color_space_interpolation(struct dw_hdmi *hdmi)
 774 {
 775         if (!hdmi_bus_fmt_is_yuv422(hdmi->hdmi_data.enc_in_bus_format))
 776                 return 0;
 777
 778         if (hdmi_bus_fmt_is_rgb(hdmi->hdmi_data.enc_out_bus_format) ||
 779             hdmi_bus_fmt_is_yuv444(hdmi->hdmi_data.enc_out_bus_format))
 780                 return 1;
 781
 782         return 0;
 783 }
 784
 785 static void dw_hdmi_update_csc_coeffs(struct dw_hdmi *hdmi)
 786 {
 787         const u16 (*csc_coeff)[3][4] = &csc_coeff_default;
 788         unsigned i;
 789         u32 csc_scale = 1;
 790
 791         if (is_color_space_conversion(hdmi)) {
 792                 if (hdmi_bus_fmt_is_rgb(hdmi->hdmi_data.enc_out_bus_format)) {
 793                         if (hdmi->hdmi_data.enc_out_encoding ==
 794                                                 V4L2_YCBCR_ENC_601)
 795                                 csc_coeff = &csc_coeff_rgb_out_eitu601;
 796                         else
 797                                 csc_coeff = &csc_coeff_rgb_out_eitu709;
 798                 } else if (hdmi_bus_fmt_is_rgb(
 799                                         hdmi->hdmi_data.enc_in_bus_format)) {
 800                         if (hdmi->hdmi_data.enc_out_encoding ==
 801                                                 V4L2_YCBCR_ENC_601)
 802                                 csc_coeff = &csc_coeff_rgb_in_eitu601;
 803                         else
 804                                 csc_coeff = &csc_coeff_rgb_in_eitu709;
 805                         csc_scale = 0;
 806                 }
 807         }
 808
 809         /* The CSC registers are sequential, alternating MSB then LSB */
 810         for (i = 0; i < ARRAY_SIZE(csc_coeff_default[0]); i++) {
 811                 u16 coeff_a = (*csc_coeff)[0][i];
 812                 u16 coeff_b = (*csc_coeff)[1][i];
 813                 u16 coeff_c = (*csc_coeff)[2][i];
 814
 815                 hdmi_writeb(hdmi, coeff_a & 0xff, HDMI_CSC_COEF_A1_LSB + i * 2);
 816                 hdmi_writeb(hdmi, coeff_a >> 8, HDMI_CSC_COEF_A1_MSB + i * 2);
 817                 hdmi_writeb(hdmi, coeff_b & 0xff, HDMI_CSC_COEF_B1_LSB + i * 2);
 818                 hdmi_writeb(hdmi, coeff_b >> 8, HDMI_CSC_COEF_B1_MSB + i * 2);
 819                 hdmi_writeb(hdmi, coeff_c & 0xff, HDMI_CSC_COEF_C1_LSB + i * 2);
 820                 hdmi_writeb(hdmi, coeff_c >> 8, HDMI_CSC_COEF_C1_MSB + i * 2);
 821         }
 822
 823         hdmi_modb(hdmi, csc_scale, HDMI_CSC_SCALE_CSCSCALE_MASK,
 824                   HDMI_CSC_SCALE);
 825 }
 826
 827 static void hdmi_video_csc(struct dw_hdmi *hdmi)
 828 {
 829         int color_depth = 0;
 830         int interpolation = HDMI_CSC_CFG_INTMODE_DISABLE;
 831         int decimation = 0;
 832
 833         /* YCC422 interpolation to 444 mode */
 834         if (is_color_space_interpolation(hdmi))
 835                 interpolation = HDMI_CSC_CFG_INTMODE_CHROMA_INT_FORMULA1;
 836         else if (is_color_space_decimation(hdmi))
 837                 decimation = HDMI_CSC_CFG_DECMODE_CHROMA_INT_FORMULA3;
 838
 839         switch (hdmi_bus_fmt_color_depth(hdmi->hdmi_data.enc_out_bus_format)) {
 840         case 8:
 841                 color_depth = HDMI_CSC_SCALE_CSC_COLORDE_PTH_24BPP;
 842                 break;
 843         case 10:
 844                 color_depth = HDMI_CSC_SCALE_CSC_COLORDE_PTH_30BPP;
 845                 break;
 846         case 12:
 847                 color_depth = HDMI_CSC_SCALE_CSC_COLORDE_PTH_36BPP;
 848                 break;
 849         case 16:
 850                 color_depth = HDMI_CSC_SCALE_CSC_COLORDE_PTH_48BPP;
 851                 break;
 852
 853         default:
 854                 return;
 855         }
 856
 857         /* Configure the CSC registers */
 858         hdmi_writeb(hdmi, interpolation | decimation, HDMI_CSC_CFG);
 859         hdmi_modb(hdmi, color_depth, HDMI_CSC_SCALE_CSC_COLORDE_PTH_MASK,
 860                   HDMI_CSC_SCALE);
 861
 862         dw_hdmi_update_csc_coeffs(hdmi);
 863 }
 864
 865 /*
 866  * HDMI video packetizer is used to packetize the data.
 867  * for example, if input is YCC422 mode or repeater is used,
 868  * data should be repacked this module can be bypassed.
 869  */
 870 static void hdmi_video_packetize(struct dw_hdmi *hdmi)
 871 {
 872         unsigned int color_depth = 0;
 873         unsigned int remap_size = HDMI_VP_REMAP_YCC422_16bit;
 874         unsigned int output_select = HDMI_VP_CONF_OUTPUT_SELECTOR_PP;
 875         struct hdmi_data_info *hdmi_data = &hdmi->hdmi_data;
 876         u8 val, vp_conf;
 877
 878         if (hdmi_bus_fmt_is_rgb(hdmi->hdmi_data.enc_out_bus_format) ||
 879             hdmi_bus_fmt_is_yuv444(hdmi->hdmi_data.enc_out_bus_format)) {
 880                 switch (hdmi_bus_fmt_color_depth(
 881                                         hdmi->hdmi_data.enc_out_bus_format)) {
 882                 case 8:
 883                         color_depth = 4;
 884                         output_select = HDMI_VP_CONF_OUTPUT_SELECTOR_BYPASS;
 885                         break;
 886                 case 10:
 887                         color_depth = 5;
 888                         break;
 889                 case 12:
 890                         color_depth = 6;
 891                         break;
 892                 case 16:
 893                         color_depth = 7;
 894                         break;
 895                 default:
 896                         output_select = HDMI_VP_CONF_OUTPUT_SELECTOR_BYPASS;
 897                 }
 898         } else if (hdmi_bus_fmt_is_yuv422(hdmi->hdmi_data.enc_out_bus_format)) {
 899                 switch (hdmi_bus_fmt_color_depth(
 900                                         hdmi->hdmi_data.enc_out_bus_format)) {
 901                 case 0:
 902                 case 8:
 903                         remap_size = HDMI_VP_REMAP_YCC422_16bit;
 904                         break;
 905                 case 10:
 906                         remap_size = HDMI_VP_REMAP_YCC422_20bit;
 907                         break;
 908                 case 12:
 909                         remap_size = HDMI_VP_REMAP_YCC422_24bit;
 910                         break;
 911
 912                 default:
 913                         return;
 914                 }
 915                 output_select = HDMI_VP_CONF_OUTPUT_SELECTOR_YCC422;
 916         } else {
 917                 return;
 918         }
 919
 920         /* set the packetizer registers */
 921         val = ((color_depth << HDMI_VP_PR_CD_COLOR_DEPTH_OFFSET) &
 922                 HDMI_VP_PR_CD_COLOR_DEPTH_MASK) |
 923                 ((hdmi_data->pix_repet_factor <<
 924                 HDMI_VP_PR_CD_DESIRED_PR_FACTOR_OFFSET) &
 925                 HDMI_VP_PR_CD_DESIRED_PR_FACTOR_MASK);
 926         hdmi_writeb(hdmi, val, HDMI_VP_PR_CD);
 927
 928         hdmi_modb(hdmi, HDMI_VP_STUFF_PR_STUFFING_STUFFING_MODE,
 929                   HDMI_VP_STUFF_PR_STUFFING_MASK, HDMI_VP_STUFF);
 930
 931         /* Data from pixel repeater block */
 932         if (hdmi_data->pix_repet_factor > 1) {
 933                 vp_conf = HDMI_VP_CONF_PR_EN_ENABLE |
 934                           HDMI_VP_CONF_BYPASS_SELECT_PIX_REPEATER;
 935         } else { /* data from packetizer block */
 936                 vp_conf = HDMI_VP_CONF_PR_EN_DISABLE |
 937                           HDMI_VP_CONF_BYPASS_SELECT_VID_PACKETIZER;
 938         }
 939
 940         hdmi_modb(hdmi, vp_conf,
 941                   HDMI_VP_CONF_PR_EN_MASK |
 942                   HDMI_VP_CONF_BYPASS_SELECT_MASK, HDMI_VP_CONF);
 943
 944         hdmi_modb(hdmi, 1 << HDMI_VP_STUFF_IDEFAULT_PHASE_OFFSET,
 945                   HDMI_VP_STUFF_IDEFAULT_PHASE_MASK, HDMI_VP_STUFF);
 946
 947         hdmi_writeb(hdmi, remap_size, HDMI_VP_REMAP);
 948
 949         if (output_select == HDMI_VP_CONF_OUTPUT_SELECTOR_PP) {
 950                 vp_conf = HDMI_VP_CONF_BYPASS_EN_DISABLE |
 951                           HDMI_VP_CONF_PP_EN_ENABLE |
 952                           HDMI_VP_CONF_YCC422_EN_DISABLE;
 953         } else if (output_select == HDMI_VP_CONF_OUTPUT_SELECTOR_YCC422) {
 954                 vp_conf = HDMI_VP_CONF_BYPASS_EN_DISABLE |
 955                           HDMI_VP_CONF_PP_EN_DISABLE |
 956                           HDMI_VP_CONF_YCC422_EN_ENABLE;
 957         } else if (output_select == HDMI_VP_CONF_OUTPUT_SELECTOR_BYPASS) {
 958                 vp_conf = HDMI_VP_CONF_BYPASS_EN_ENABLE |
 959                           HDMI_VP_CONF_PP_EN_DISABLE |
 960                           HDMI_VP_CONF_YCC422_EN_DISABLE;
 961         } else {
 962                 return;
 963         }
 964
 965         hdmi_modb(hdmi, vp_conf,
 966                   HDMI_VP_CONF_BYPASS_EN_MASK | HDMI_VP_CONF_PP_EN_ENMASK |
 967                   HDMI_VP_CONF_YCC422_EN_MASK, HDMI_VP_CONF);
 968
 969         hdmi_modb(hdmi, HDMI_VP_STUFF_PP_STUFFING_STUFFING_MODE |
 970                         HDMI_VP_STUFF_YCC422_STUFFING_STUFFING_MODE,
 971                   HDMI_VP_STUFF_PP_STUFFING_MASK |
 972                   HDMI_VP_STUFF_YCC422_STUFFING_MASK, HDMI_VP_STUFF);
 973
 974         hdmi_modb(hdmi, output_select, HDMI_VP_CONF_OUTPUT_SELECTOR_MASK,
 975                   HDMI_VP_CONF);
 976 }
 977
 978 /* -----------------------------------------------------------------------------
 979  * Synopsys PHY Handling
 980  */
 981
 982 static inline void hdmi_phy_test_clear(struct dw_hdmi *hdmi,
 983                                        unsigned char bit)
 984 {
 985         hdmi_modb(hdmi, bit << HDMI_PHY_TST0_TSTCLR_OFFSET,
 986                   HDMI_PHY_TST0_TSTCLR_MASK, HDMI_PHY_TST0);
 987 }
 988
 989 static bool hdmi_phy_wait_i2c_done(struct dw_hdmi *hdmi, int msec)
 990 {
 991         u32 val;
 992
 993         while ((val = hdmi_readb(hdmi, HDMI_IH_I2CMPHY_STAT0) & 0x3) == 0) {
 994                 if (msec-- == 0)
 995                         return false;
 996                 udelay(1000);
 997         }
 998         hdmi_writeb(hdmi, val, HDMI_IH_I2CMPHY_STAT0);
 999
1000         return true;
1001 }
1002
1003 void dw_hdmi_phy_i2c_write(struct dw_hdmi *hdmi, unsigned short data,
1004                            unsigned char addr)
1005 {
1006         hdmi_writeb(hdmi, 0xFF, HDMI_IH_I2CMPHY_STAT0);
1007         hdmi_writeb(hdmi, addr, HDMI_PHY_I2CM_ADDRESS_ADDR);
1008         hdmi_writeb(hdmi, (unsigned char)(data >> 8),
1009                     HDMI_PHY_I2CM_DATAO_1_ADDR);
1010         hdmi_writeb(hdmi, (unsigned char)(data >> 0),
1011                     HDMI_PHY_I2CM_DATAO_0_ADDR);
1012         hdmi_writeb(hdmi, HDMI_PHY_I2CM_OPERATION_ADDR_WRITE,
1013                     HDMI_PHY_I2CM_OPERATION_ADDR);
1014         hdmi_phy_wait_i2c_done(hdmi, 1000);
1015 }
1016 EXPORT_SYMBOL_GPL(dw_hdmi_phy_i2c_write);
1017
1018 static void dw_hdmi_phy_enable_powerdown(struct dw_hdmi *hdmi, bool enable)
1019 {
1020         hdmi_mask_writeb(hdmi, !enable, HDMI_PHY_CONF0,
1021                          HDMI_PHY_CONF0_PDZ_OFFSET,
1022                          HDMI_PHY_CONF0_PDZ_MASK);
1023 }
1024
1025 static void dw_hdmi_phy_enable_tmds(struct dw_hdmi *hdmi, u8 enable)
1026 {
1027         hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
1028                          HDMI_PHY_CONF0_ENTMDS_OFFSET,
1029                          HDMI_PHY_CONF0_ENTMDS_MASK);
1030 }
1031
1032 static void dw_hdmi_phy_enable_svsret(struct dw_hdmi *hdmi, u8 enable)
1033 {
1034         hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
1035                          HDMI_PHY_CONF0_SVSRET_OFFSET,
1036                          HDMI_PHY_CONF0_SVSRET_MASK);
1037 }
1038
1039 void dw_hdmi_phy_gen2_pddq(struct dw_hdmi *hdmi, u8 enable)
1040 {
1041         hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
1042                          HDMI_PHY_CONF0_GEN2_PDDQ_OFFSET,
1043                          HDMI_PHY_CONF0_GEN2_PDDQ_MASK);
1044 }
1045 EXPORT_SYMBOL_GPL(dw_hdmi_phy_gen2_pddq);
1046
1047 void dw_hdmi_phy_gen2_txpwron(struct dw_hdmi *hdmi, u8 enable)
1048 {
1049         hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
1050                          HDMI_PHY_CONF0_GEN2_TXPWRON_OFFSET,
1051                          HDMI_PHY_CONF0_GEN2_TXPWRON_MASK);
1052 }
1053 EXPORT_SYMBOL_GPL(dw_hdmi_phy_gen2_txpwron);
1054
1055 static void dw_hdmi_phy_sel_data_en_pol(struct dw_hdmi *hdmi, u8 enable)
1056 {
1057         hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
1058                          HDMI_PHY_CONF0_SELDATAENPOL_OFFSET,
1059                          HDMI_PHY_CONF0_SELDATAENPOL_MASK);
1060 }
1061
1062 static void dw_hdmi_phy_sel_interface_control(struct dw_hdmi *hdmi, u8 enable)
1063 {
1064         hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
1065                          HDMI_PHY_CONF0_SELDIPIF_OFFSET,
1066                          HDMI_PHY_CONF0_SELDIPIF_MASK);
1067 }
1068
1069 void dw_hdmi_phy_reset(struct dw_hdmi *hdmi)
1070 {
1071         /* PHY reset. The reset signal is active high on Gen2 PHYs. */
1072         hdmi_writeb(hdmi, HDMI_MC_PHYRSTZ_PHYRSTZ, HDMI_MC_PHYRSTZ);
1073         hdmi_writeb(hdmi, 0, HDMI_MC_PHYRSTZ);
1074 }
1075 EXPORT_SYMBOL_GPL(dw_hdmi_phy_reset);
1076
1077 void dw_hdmi_phy_i2c_set_addr(struct dw_hdmi *hdmi, u8 address)
1078 {
1079         hdmi_phy_test_clear(hdmi, 1);
1080         hdmi_writeb(hdmi, address, HDMI_PHY_I2CM_SLAVE_ADDR);
1081         hdmi_phy_test_clear(hdmi, 0);
1082 }
1083 EXPORT_SYMBOL_GPL(dw_hdmi_phy_i2c_set_addr);
1084
1085 static void dw_hdmi_phy_power_off(struct dw_hdmi *hdmi)
1086 {
1087         const struct dw_hdmi_phy_data *phy = hdmi->phy.data;
1088         unsigned int i;
1089         u16 val;
1090
1091         if (phy->gen == 1) {
1092                 dw_hdmi_phy_enable_tmds(hdmi, 0);
1093                 dw_hdmi_phy_enable_powerdown(hdmi, true);
1094                 return;
1095         }
1096
1097         dw_hdmi_phy_gen2_txpwron(hdmi, 0);
1098
1099         /*
1100          * Wait for TX_PHY_LOCK to be deasserted to indicate that the PHY went
1101          * to low power mode.
1102          */
1103         for (i = 0; i < 5; ++i) {
1104                 val = hdmi_readb(hdmi, HDMI_PHY_STAT0);
1105                 if (!(val & HDMI_PHY_TX_PHY_LOCK))
1106                         break;
1107
1108                 usleep_range(1000, 2000);
1109         }
1110
1111         if (val & HDMI_PHY_TX_PHY_LOCK)
1112                 dev_warn(hdmi->dev, "PHY failed to power down\n");
1113         else
1114                 dev_dbg(hdmi->dev, "PHY powered down in %u iterations\n", i);
1115
1116         dw_hdmi_phy_gen2_pddq(hdmi, 1);
1117 }
1118
1119 static int dw_hdmi_phy_power_on(struct dw_hdmi *hdmi)
1120 {
1121         const struct dw_hdmi_phy_data *phy = hdmi->phy.data;
1122         unsigned int i;
1123         u8 val;
1124
1125         if (phy->gen == 1) {
1126                 dw_hdmi_phy_enable_powerdown(hdmi, false);
1127
1128                 /* Toggle TMDS enable. */
1129                 dw_hdmi_phy_enable_tmds(hdmi, 0);
1130                 dw_hdmi_phy_enable_tmds(hdmi, 1);
1131                 return 0;
1132         }
1133
1134         dw_hdmi_phy_gen2_txpwron(hdmi, 1);
1135         dw_hdmi_phy_gen2_pddq(hdmi, 0);
1136
1137         /* Wait for PHY PLL lock */
1138         for (i = 0; i < 5; ++i) {
1139                 val = hdmi_readb(hdmi, HDMI_PHY_STAT0) & HDMI_PHY_TX_PHY_LOCK;
1140                 if (val)
1141                         break;
1142
1143                 usleep_range(1000, 2000);
1144         }
1145
1146         if (!val) {
1147                 dev_err(hdmi->dev, "PHY PLL failed to lock\n");
1148                 return -ETIMEDOUT;
1149         }
1150
1151         dev_dbg(hdmi->dev, "PHY PLL locked %u iterations\n", i);
1152         return 0;
1153 }
1154
1155 /*
1156  * PHY configuration function for the DWC HDMI 3D TX PHY. Based on the available
1157  * information the DWC MHL PHY has the same register layout and is thus also
1158  * supported by this function.
1159  */
1160 static int hdmi_phy_configure_dwc_hdmi_3d_tx(struct dw_hdmi *hdmi,
1161                 const struct dw_hdmi_plat_data *pdata,
1162                 unsigned long mpixelclock)
1163 {
1164         const struct dw_hdmi_mpll_config *mpll_config = pdata->mpll_cfg;
1165         const struct dw_hdmi_curr_ctrl *curr_ctrl = pdata->cur_ctr;
1166         const struct dw_hdmi_phy_config *phy_config = pdata->phy_config;
1167
1168         /* PLL/MPLL Cfg - always match on final entry */
1169         for (; mpll_config->mpixelclock != ~0UL; mpll_config++)
1170                 if (mpixelclock <= mpll_config->mpixelclock)
1171                         break;
1172
1173         for (; curr_ctrl->mpixelclock != ~0UL; curr_ctrl++)
1174                 if (mpixelclock <= curr_ctrl->mpixelclock)
1175                         break;
1176
1177         for (; phy_config->mpixelclock != ~0UL; phy_config++)
1178                 if (mpixelclock <= phy_config->mpixelclock)
1179                         break;
1180
1181         if (mpll_config->mpixelclock == ~0UL ||
1182             curr_ctrl->mpixelclock == ~0UL ||
1183             phy_config->mpixelclock == ~0UL)
1184                 return -EINVAL;
1185
1186         dw_hdmi_phy_i2c_write(hdmi, mpll_config->res[0].cpce,
1187                               HDMI_3D_TX_PHY_CPCE_CTRL);
1188         dw_hdmi_phy_i2c_write(hdmi, mpll_config->res[0].gmp,
1189                               HDMI_3D_TX_PHY_GMPCTRL);
1190         dw_hdmi_phy_i2c_write(hdmi, curr_ctrl->curr[0],
1191                               HDMI_3D_TX_PHY_CURRCTRL);
1192
1193         dw_hdmi_phy_i2c_write(hdmi, 0, HDMI_3D_TX_PHY_PLLPHBYCTRL);
1194         dw_hdmi_phy_i2c_write(hdmi, HDMI_3D_TX_PHY_MSM_CTRL_CKO_SEL_FB_CLK,
1195                               HDMI_3D_TX_PHY_MSM_CTRL);
1196
1197         dw_hdmi_phy_i2c_write(hdmi, phy_config->term, HDMI_3D_TX_PHY_TXTERM);
1198         dw_hdmi_phy_i2c_write(hdmi, phy_config->sym_ctr,
1199                               HDMI_3D_TX_PHY_CKSYMTXCTRL);
1200         dw_hdmi_phy_i2c_write(hdmi, phy_config->vlev_ctr,
1201                               HDMI_3D_TX_PHY_VLEVCTRL);
1202
1203         /* Override and disable clock termination. */
1204         dw_hdmi_phy_i2c_write(hdmi, HDMI_3D_TX_PHY_CKCALCTRL_OVERRIDE,
1205                               HDMI_3D_TX_PHY_CKCALCTRL);
1206
1207         return 0;
1208 }
1209
1210 static int hdmi_phy_configure(struct dw_hdmi *hdmi)
1211 {
1212         const struct dw_hdmi_phy_data *phy = hdmi->phy.data;
1213         const struct dw_hdmi_plat_data *pdata = hdmi->plat_data;
1214         unsigned long mpixelclock = hdmi->hdmi_data.video_mode.mpixelclock;
1215         int ret;
1216
1217         dw_hdmi_phy_power_off(hdmi);
1218
1219         /* Leave low power consumption mode by asserting SVSRET. */
1220         if (phy->has_svsret)
1221                 dw_hdmi_phy_enable_svsret(hdmi, 1);
1222
1223         dw_hdmi_phy_reset(hdmi);
1224
1225         hdmi_writeb(hdmi, HDMI_MC_HEACPHY_RST_ASSERT, HDMI_MC_HEACPHY_RST);
1226
1227         dw_hdmi_phy_i2c_set_addr(hdmi, HDMI_PHY_I2CM_SLAVE_ADDR_PHY_GEN2);
1228
1229         /* Write to the PHY as configured by the platform */
1230         if (pdata->configure_phy)
1231                 ret = pdata->configure_phy(hdmi, pdata, mpixelclock);
1232         else
1233                 ret = phy->configure(hdmi, pdata, mpixelclock);
1234         if (ret) {
1235                 dev_err(hdmi->dev, "PHY configuration failed (clock %lu)\n",
1236                         mpixelclock);
1237                 return ret;
1238         }
1239
1240         return dw_hdmi_phy_power_on(hdmi);
1241 }
1242
1243 static int dw_hdmi_phy_init(struct dw_hdmi *hdmi, void *data,
1244                             struct drm_display_mode *mode)
1245 {
1246         int i, ret;
1247
1248         /* HDMI Phy spec says to do the phy initialization sequence twice */
1249         for (i = 0; i < 2; i++) {
1250                 dw_hdmi_phy_sel_data_en_pol(hdmi, 1);
1251                 dw_hdmi_phy_sel_interface_control(hdmi, 0);
1252
1253                 ret = hdmi_phy_configure(hdmi);
1254                 if (ret)
1255                         return ret;
1256         }
1257
1258         return 0;
1259 }
1260
1261 static void dw_hdmi_phy_disable(struct dw_hdmi *hdmi, void *data)
1262 {
1263         dw_hdmi_phy_power_off(hdmi);
1264 }
1265
1266 enum drm_connector_status dw_hdmi_phy_read_hpd(struct dw_hdmi *hdmi,
1267                                                void *data)
1268 {
1269         return hdmi_readb(hdmi, HDMI_PHY_STAT0) & HDMI_PHY_HPD ?
1270                 connector_status_connected : connector_status_disconnected;
1271 }
1272 EXPORT_SYMBOL_GPL(dw_hdmi_phy_read_hpd);
1273
1274 void dw_hdmi_phy_update_hpd(struct dw_hdmi *hdmi, void *data,
1275                             bool force, bool disabled, bool rxsense)
1276 {
1277         u8 old_mask = hdmi->phy_mask;
1278
1279         if (force || disabled || !rxsense)
1280                 hdmi->phy_mask |= HDMI_PHY_RX_SENSE;
1281         else
1282                 hdmi->phy_mask &= ~HDMI_PHY_RX_SENSE;
1283
1284         if (old_mask != hdmi->phy_mask)
1285                 hdmi_writeb(hdmi, hdmi->phy_mask, HDMI_PHY_MASK0);
1286 }
1287 EXPORT_SYMBOL_GPL(dw_hdmi_phy_update_hpd);
1288
1289 void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data)
1290 {
1291         /*
1292          * Configure the PHY RX SENSE and HPD interrupts polarities and clear
1293          * any pending interrupt.
1294          */
1295         hdmi_writeb(hdmi, HDMI_PHY_HPD | HDMI_PHY_RX_SENSE, HDMI_PHY_POL0);
1296         hdmi_writeb(hdmi, HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE,
1297                     HDMI_IH_PHY_STAT0);
1298
1299         /* Enable cable hot plug irq. */
1300         hdmi_writeb(hdmi, hdmi->phy_mask, HDMI_PHY_MASK0);
1301
1302         /* Clear and unmute interrupts. */
1303         hdmi_writeb(hdmi, HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE,
1304                     HDMI_IH_PHY_STAT0);
1305         hdmi_writeb(hdmi, ~(HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE),
1306                     HDMI_IH_MUTE_PHY_STAT0);
1307 }
1308 EXPORT_SYMBOL_GPL(dw_hdmi_phy_setup_hpd);
1309
1310 static const struct dw_hdmi_phy_ops dw_hdmi_synopsys_phy_ops = {
1311         .init = dw_hdmi_phy_init,
1312         .disable = dw_hdmi_phy_disable,
1313         .read_hpd = dw_hdmi_phy_read_hpd,
1314         .update_hpd = dw_hdmi_phy_update_hpd,
1315         .setup_hpd = dw_hdmi_phy_setup_hpd,
1316 };
1317
1318 /* -----------------------------------------------------------------------------
1319  * HDMI TX Setup
1320  */
1321
1322 static void hdmi_tx_hdcp_config(struct dw_hdmi *hdmi)
1323 {
1324         u8 de;
1325
1326         if (hdmi->hdmi_data.video_mode.mdataenablepolarity)
1327                 de = HDMI_A_VIDPOLCFG_DATAENPOL_ACTIVE_HIGH;
1328         else
1329                 de = HDMI_A_VIDPOLCFG_DATAENPOL_ACTIVE_LOW;
1330
1331         /* disable rx detect */
1332         hdmi_modb(hdmi, HDMI_A_HDCPCFG0_RXDETECT_DISABLE,
1333                   HDMI_A_HDCPCFG0_RXDETECT_MASK, HDMI_A_HDCPCFG0);
1334
1335         hdmi_modb(hdmi, de, HDMI_A_VIDPOLCFG_DATAENPOL_MASK, HDMI_A_VIDPOLCFG);
1336
1337         hdmi_modb(hdmi, HDMI_A_HDCPCFG1_ENCRYPTIONDISABLE_DISABLE,
1338                   HDMI_A_HDCPCFG1_ENCRYPTIONDISABLE_MASK, HDMI_A_HDCPCFG1);
1339 }
1340
1341 static void hdmi_config_AVI(struct dw_hdmi *hdmi, struct drm_display_mode *mode)
1342 {
1343         struct hdmi_avi_infoframe frame;
1344         u8 val;
1345
1346         /* Initialise info frame from DRM mode */
1347         drm_hdmi_avi_infoframe_from_display_mode(&frame, mode, false);
1348
1349         if (hdmi_bus_fmt_is_yuv444(hdmi->hdmi_data.enc_out_bus_format))
1350                 frame.colorspace = HDMI_COLORSPACE_YUV444;
1351         else if (hdmi_bus_fmt_is_yuv422(hdmi->hdmi_data.enc_out_bus_format))
1352                 frame.colorspace = HDMI_COLORSPACE_YUV422;
1353         else
1354                 frame.colorspace = HDMI_COLORSPACE_RGB;
1355
1356         /* Set up colorimetry */
1357         switch (hdmi->hdmi_data.enc_out_encoding) {
1358         case V4L2_YCBCR_ENC_601:
1359                 if (hdmi->hdmi_data.enc_in_encoding == V4L2_YCBCR_ENC_XV601)
1360                         frame.colorimetry = HDMI_COLORIMETRY_EXTENDED;
1361                 else
1362                         frame.colorimetry = HDMI_COLORIMETRY_ITU_601;
1363                 frame.extended_colorimetry =
1364                                 HDMI_EXTENDED_COLORIMETRY_XV_YCC_601;
1365                 break;
1366         case V4L2_YCBCR_ENC_709:
1367                 if (hdmi->hdmi_data.enc_in_encoding == V4L2_YCBCR_ENC_XV709)
1368                         frame.colorimetry = HDMI_COLORIMETRY_EXTENDED;
1369                 else
1370                         frame.colorimetry = HDMI_COLORIMETRY_ITU_709;
1371                 frame.extended_colorimetry =
1372                                 HDMI_EXTENDED_COLORIMETRY_XV_YCC_709;
1373                 break;
1374         default: /* Carries no data */
1375                 frame.colorimetry = HDMI_COLORIMETRY_ITU_601;
1376                 frame.extended_colorimetry =
1377                                 HDMI_EXTENDED_COLORIMETRY_XV_YCC_601;
1378                 break;
1379         }
1380
1381         frame.scan_mode = HDMI_SCAN_MODE_NONE;
1382
1383         /*
1384          * The Designware IP uses a different byte format from standard
1385          * AVI info frames, though generally the bits are in the correct
1386          * bytes.
1387          */
1388
1389         /*
1390          * AVI data byte 1 differences: Colorspace in bits 0,1 rather than 5,6,
1391          * scan info in bits 4,5 rather than 0,1 and active aspect present in
1392          * bit 6 rather than 4.
1393          */
1394         val = (frame.scan_mode & 3) << 4 | (frame.colorspace & 3);
1395         if (frame.active_aspect & 15)
1396                 val |= HDMI_FC_AVICONF0_ACTIVE_FMT_INFO_PRESENT;
1397         if (frame.top_bar || frame.bottom_bar)
1398                 val |= HDMI_FC_AVICONF0_BAR_DATA_HORIZ_BAR;
1399         if (frame.left_bar || frame.right_bar)
1400                 val |= HDMI_FC_AVICONF0_BAR_DATA_VERT_BAR;
1401         hdmi_writeb(hdmi, val, HDMI_FC_AVICONF0);
1402
1403         /* AVI data byte 2 differences: none */
1404         val = ((frame.colorimetry & 0x3) << 6) |
1405               ((frame.picture_aspect & 0x3) << 4) |
1406               (frame.active_aspect & 0xf);
1407         hdmi_writeb(hdmi, val, HDMI_FC_AVICONF1);
1408
1409         /* AVI data byte 3 differences: none */
1410         val = ((frame.extended_colorimetry & 0x7) << 4) |
1411               ((frame.quantization_range & 0x3) << 2) |
1412               (frame.nups & 0x3);
1413         if (frame.itc)
1414                 val |= HDMI_FC_AVICONF2_IT_CONTENT_VALID;
1415         hdmi_writeb(hdmi, val, HDMI_FC_AVICONF2);
1416
1417         /* AVI data byte 4 differences: none */
1418         val = frame.video_code & 0x7f;
1419         hdmi_writeb(hdmi, val, HDMI_FC_AVIVID);
1420
1421         /* AVI Data Byte 5- set up input and output pixel repetition */
1422         val = (((hdmi->hdmi_data.video_mode.mpixelrepetitioninput + 1) <<
1423                 HDMI_FC_PRCONF_INCOMING_PR_FACTOR_OFFSET) &
1424                 HDMI_FC_PRCONF_INCOMING_PR_FACTOR_MASK) |
1425                 ((hdmi->hdmi_data.video_mode.mpixelrepetitionoutput <<
1426                 HDMI_FC_PRCONF_OUTPUT_PR_FACTOR_OFFSET) &
1427                 HDMI_FC_PRCONF_OUTPUT_PR_FACTOR_MASK);
1428         hdmi_writeb(hdmi, val, HDMI_FC_PRCONF);
1429
1430         /*
1431          * AVI data byte 5 differences: content type in 0,1 rather than 4,5,
1432          * ycc range in bits 2,3 rather than 6,7
1433          */
1434         val = ((frame.ycc_quantization_range & 0x3) << 2) |
1435               (frame.content_type & 0x3);
1436         hdmi_writeb(hdmi, val, HDMI_FC_AVICONF3);
1437
1438         /* AVI Data Bytes 6-13 */
1439         hdmi_writeb(hdmi, frame.top_bar & 0xff, HDMI_FC_AVIETB0);
1440         hdmi_writeb(hdmi, (frame.top_bar >> 8) & 0xff, HDMI_FC_AVIETB1);
1441         hdmi_writeb(hdmi, frame.bottom_bar & 0xff, HDMI_FC_AVISBB0);
1442         hdmi_writeb(hdmi, (frame.bottom_bar >> 8) & 0xff, HDMI_FC_AVISBB1);
1443         hdmi_writeb(hdmi, frame.left_bar & 0xff, HDMI_FC_AVIELB0);
1444         hdmi_writeb(hdmi, (frame.left_bar >> 8) & 0xff, HDMI_FC_AVIELB1);
1445         hdmi_writeb(hdmi, frame.right_bar & 0xff, HDMI_FC_AVISRB0);
1446         hdmi_writeb(hdmi, (frame.right_bar >> 8) & 0xff, HDMI_FC_AVISRB1);
1447 }
1448
1449 static void hdmi_config_vendor_specific_infoframe(struct dw_hdmi *hdmi,
1450                                                  struct drm_display_mode *mode)
1451 {
1452         struct hdmi_vendor_infoframe frame;
1453         u8 buffer[10];
1454         ssize_t err;
1455
1456         err = drm_hdmi_vendor_infoframe_from_display_mode(&frame,
1457                                                           &hdmi->connector,
1458                                                           mode);
1459         if (err < 0)
1460                 /*
1461                  * Going into that statement does not means vendor infoframe
1462                  * fails. It just informed us that vendor infoframe is not
1463                  * needed for the selected mode. Only 4k or stereoscopic 3D
1464                  * mode requires vendor infoframe. So just simply return.
1465                  */
1466                 return;
1467
1468         err = hdmi_vendor_infoframe_pack(&frame, buffer, sizeof(buffer));
1469         if (err < 0) {
1470                 dev_err(hdmi->dev, "Failed to pack vendor infoframe: %zd\n",
1471                         err);
1472                 return;
1473         }
1474         hdmi_mask_writeb(hdmi, 0, HDMI_FC_DATAUTO0, HDMI_FC_DATAUTO0_VSD_OFFSET,
1475                         HDMI_FC_DATAUTO0_VSD_MASK);
1476
1477         /* Set the length of HDMI vendor specific InfoFrame payload */
1478         hdmi_writeb(hdmi, buffer[2], HDMI_FC_VSDSIZE);
1479
1480         /* Set 24bit IEEE Registration Identifier */
1481         hdmi_writeb(hdmi, buffer[4], HDMI_FC_VSDIEEEID0);
1482         hdmi_writeb(hdmi, buffer[5], HDMI_FC_VSDIEEEID1);
1483         hdmi_writeb(hdmi, buffer[6], HDMI_FC_VSDIEEEID2);
1484
1485         /* Set HDMI_Video_Format and HDMI_VIC/3D_Structure */
1486         hdmi_writeb(hdmi, buffer[7], HDMI_FC_VSDPAYLOAD0);
1487         hdmi_writeb(hdmi, buffer[8], HDMI_FC_VSDPAYLOAD1);
1488
1489         if (frame.s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF)
1490                 hdmi_writeb(hdmi, buffer[9], HDMI_FC_VSDPAYLOAD2);
1491
1492         /* Packet frame interpolation */
1493         hdmi_writeb(hdmi, 1, HDMI_FC_DATAUTO1);
1494
1495         /* Auto packets per frame and line spacing */
1496         hdmi_writeb(hdmi, 0x11, HDMI_FC_DATAUTO2);
1497
1498         /* Configures the Frame Composer On RDRB mode */
1499         hdmi_mask_writeb(hdmi, 1, HDMI_FC_DATAUTO0, HDMI_FC_DATAUTO0_VSD_OFFSET,
1500                         HDMI_FC_DATAUTO0_VSD_MASK);
1501 }
1502
1503 static void hdmi_av_composer(struct dw_hdmi *hdmi,
1504                              const struct drm_display_mode *mode)
1505 {
1506         u8 inv_val;
1507         struct hdmi_vmode *vmode = &hdmi->hdmi_data.video_mode;
1508         int hblank, vblank, h_de_hs, v_de_vs, hsync_len, vsync_len;
1509         unsigned int vdisplay;
1510
1511         vmode->mpixelclock = mode->clock * 1000;
1512
1513         dev_dbg(hdmi->dev, "final pixclk = %d\n", vmode->mpixelclock);
1514
1515         /* Set up HDMI_FC_INVIDCONF */
1516         inv_val = (hdmi->hdmi_data.hdcp_enable ?
1517                 HDMI_FC_INVIDCONF_HDCP_KEEPOUT_ACTIVE :
1518                 HDMI_FC_INVIDCONF_HDCP_KEEPOUT_INACTIVE);
1519
1520         inv_val |= mode->flags & DRM_MODE_FLAG_PVSYNC ?
1521                 HDMI_FC_INVIDCONF_VSYNC_IN_POLARITY_ACTIVE_HIGH :
1522                 HDMI_FC_INVIDCONF_VSYNC_IN_POLARITY_ACTIVE_LOW;
1523
1524         inv_val |= mode->flags & DRM_MODE_FLAG_PHSYNC ?
1525                 HDMI_FC_INVIDCONF_HSYNC_IN_POLARITY_ACTIVE_HIGH :
1526                 HDMI_FC_INVIDCONF_HSYNC_IN_POLARITY_ACTIVE_LOW;
1527
1528         inv_val |= (vmode->mdataenablepolarity ?
1529                 HDMI_FC_INVIDCONF_DE_IN_POLARITY_ACTIVE_HIGH :
1530                 HDMI_FC_INVIDCONF_DE_IN_POLARITY_ACTIVE_LOW);
1531
1532         if (hdmi->vic == 39)
1533                 inv_val |= HDMI_FC_INVIDCONF_R_V_BLANK_IN_OSC_ACTIVE_HIGH;
1534         else
1535                 inv_val |= mode->flags & DRM_MODE_FLAG_INTERLACE ?
1536                         HDMI_FC_INVIDCONF_R_V_BLANK_IN_OSC_ACTIVE_HIGH :
1537                         HDMI_FC_INVIDCONF_R_V_BLANK_IN_OSC_ACTIVE_LOW;
1538
1539         inv_val |= mode->flags & DRM_MODE_FLAG_INTERLACE ?
1540                 HDMI_FC_INVIDCONF_IN_I_P_INTERLACED :
1541                 HDMI_FC_INVIDCONF_IN_I_P_PROGRESSIVE;
1542
1543         inv_val |= hdmi->sink_is_hdmi ?
1544                 HDMI_FC_INVIDCONF_DVI_MODEZ_HDMI_MODE :
1545                 HDMI_FC_INVIDCONF_DVI_MODEZ_DVI_MODE;
1546
1547         hdmi_writeb(hdmi, inv_val, HDMI_FC_INVIDCONF);
1548
1549         vdisplay = mode->vdisplay;
1550         vblank = mode->vtotal - mode->vdisplay;
1551         v_de_vs = mode->vsync_start - mode->vdisplay;
1552         vsync_len = mode->vsync_end - mode->vsync_start;
1553
1554         /*
1555          * When we're setting an interlaced mode, we need
1556          * to adjust the vertical timing to suit.
1557          */
1558         if (mode->flags & DRM_MODE_FLAG_INTERLACE) {
1559                 vdisplay /= 2;
1560                 vblank /= 2;
1561                 v_de_vs /= 2;
1562                 vsync_len /= 2;
1563         }
1564
1565         /* Set up horizontal active pixel width */
1566         hdmi_writeb(hdmi, mode->hdisplay >> 8, HDMI_FC_INHACTV1);
1567         hdmi_writeb(hdmi, mode->hdisplay, HDMI_FC_INHACTV0);
1568
1569         /* Set up vertical active lines */
1570         hdmi_writeb(hdmi, vdisplay >> 8, HDMI_FC_INVACTV1);
1571         hdmi_writeb(hdmi, vdisplay, HDMI_FC_INVACTV0);
1572
1573         /* Set up horizontal blanking pixel region width */
1574         hblank = mode->htotal - mode->hdisplay;
1575         hdmi_writeb(hdmi, hblank >> 8, HDMI_FC_INHBLANK1);
1576         hdmi_writeb(hdmi, hblank, HDMI_FC_INHBLANK0);
1577
1578         /* Set up vertical blanking pixel region width */
1579         hdmi_writeb(hdmi, vblank, HDMI_FC_INVBLANK);
1580
1581         /* Set up HSYNC active edge delay width (in pixel clks) */
1582         h_de_hs = mode->hsync_start - mode->hdisplay;
1583         hdmi_writeb(hdmi, h_de_hs >> 8, HDMI_FC_HSYNCINDELAY1);
1584         hdmi_writeb(hdmi, h_de_hs, HDMI_FC_HSYNCINDELAY0);
1585
1586         /* Set up VSYNC active edge delay (in lines) */
1587         hdmi_writeb(hdmi, v_de_vs, HDMI_FC_VSYNCINDELAY);
1588
1589         /* Set up HSYNC active pulse width (in pixel clks) */
1590         hsync_len = mode->hsync_end - mode->hsync_start;
1591         hdmi_writeb(hdmi, hsync_len >> 8, HDMI_FC_HSYNCINWIDTH1);
1592         hdmi_writeb(hdmi, hsync_len, HDMI_FC_HSYNCINWIDTH0);
1593
1594         /* Set up VSYNC active edge delay (in lines) */
1595         hdmi_writeb(hdmi, vsync_len, HDMI_FC_VSYNCINWIDTH);
1596 }
1597
1598 /* HDMI Initialization Step B.4 */
1599 static void dw_hdmi_enable_video_path(struct dw_hdmi *hdmi)
1600 {
1601         /* control period minimum duration */
1602         hdmi_writeb(hdmi, 12, HDMI_FC_CTRLDUR);
1603         hdmi_writeb(hdmi, 32, HDMI_FC_EXCTRLDUR);
1604         hdmi_writeb(hdmi, 1, HDMI_FC_EXCTRLSPAC);
1605
1606         /* Set to fill TMDS data channels */
1607         hdmi_writeb(hdmi, 0x0B, HDMI_FC_CH0PREAM);
1608         hdmi_writeb(hdmi, 0x16, HDMI_FC_CH1PREAM);
1609         hdmi_writeb(hdmi, 0x21, HDMI_FC_CH2PREAM);
1610
1611         /* Enable pixel clock and tmds data path */
1612         hdmi->mc_clkdis |= HDMI_MC_CLKDIS_HDCPCLK_DISABLE |
1613                            HDMI_MC_CLKDIS_CSCCLK_DISABLE |
1614                            HDMI_MC_CLKDIS_AUDCLK_DISABLE |
1615                            HDMI_MC_CLKDIS_PREPCLK_DISABLE |
1616                            HDMI_MC_CLKDIS_TMDSCLK_DISABLE;
1617         hdmi->mc_clkdis &= ~HDMI_MC_CLKDIS_PIXELCLK_DISABLE;
1618         hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS);
1619
1620         hdmi->mc_clkdis &= ~HDMI_MC_CLKDIS_TMDSCLK_DISABLE;
1621         hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS);
1622
1623         /* Enable csc path */
1624         if (is_color_space_conversion(hdmi)) {
1625                 hdmi->mc_clkdis &= ~HDMI_MC_CLKDIS_CSCCLK_DISABLE;
1626                 hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS);
1627         }
1628
1629         /* Enable color space conversion if needed */
1630         if (is_color_space_conversion(hdmi))
1631                 hdmi_writeb(hdmi, HDMI_MC_FLOWCTRL_FEED_THROUGH_OFF_CSC_IN_PATH,
1632                             HDMI_MC_FLOWCTRL);
1633         else
1634                 hdmi_writeb(hdmi, HDMI_MC_FLOWCTRL_FEED_THROUGH_OFF_CSC_BYPASS,
1635                             HDMI_MC_FLOWCTRL);
1636 }
1637
1638 /* Workaround to clear the overflow condition */
1639 static void dw_hdmi_clear_overflow(struct dw_hdmi *hdmi)
1640 {
1641         unsigned int count;
1642         unsigned int i;
1643         u8 val;
1644
1645         /*
1646          * Under some circumstances the Frame Composer arithmetic unit can miss
1647          * an FC register write due to being busy processing the previous one.
1648          * The issue can be worked around by issuing a TMDS software reset and
1649          * then write one of the FC registers several times.
1650          *
1651          * The number of iterations matters and depends on the HDMI TX revision
1652          * (and possibly on the platform). So far i.MX6Q (v1.30a), i.MX6DL
1653          * (v1.31a) and multiple Allwinner SoCs (v1.32a) have been identified
1654          * as needing the workaround, with 4 iterations for v1.30a and 1
1655          * iteration for others.
1656          * The Amlogic Meson GX SoCs (v2.01a) have been identified as needing
1657          * the workaround with a single iteration.
1658          */
1659
1660         switch (hdmi->version) {
1661         case 0x130a:
1662                 count = 4;
1663                 break;
1664         case 0x131a:
1665         case 0x132a:
1666         case 0x201a:
1667                 count = 1;
1668                 break;
1669         default:
1670                 return;
1671         }
1672
1673         /* TMDS software reset */
1674         hdmi_writeb(hdmi, (u8)~HDMI_MC_SWRSTZ_TMDSSWRST_REQ, HDMI_MC_SWRSTZ);
1675
1676         val = hdmi_readb(hdmi, HDMI_FC_INVIDCONF);
1677         for (i = 0; i < count; i++)
1678                 hdmi_writeb(hdmi, val, HDMI_FC_INVIDCONF);
1679 }
1680
1681 static void hdmi_disable_overflow_interrupts(struct dw_hdmi *hdmi)
1682 {
1683         hdmi_writeb(hdmi, HDMI_IH_MUTE_FC_STAT2_OVERFLOW_MASK,
1684                     HDMI_IH_MUTE_FC_STAT2);
1685 }
1686
1687 static int dw_hdmi_setup(struct dw_hdmi *hdmi, struct drm_display_mode *mode)
1688 {
1689         int ret;
1690
1691         hdmi_disable_overflow_interrupts(hdmi);
1692
1693         hdmi->vic = drm_match_cea_mode(mode);
1694
1695         if (!hdmi->vic) {
1696                 dev_dbg(hdmi->dev, "Non-CEA mode used in HDMI\n");
1697         } else {
1698                 dev_dbg(hdmi->dev, "CEA mode used vic=%d\n", hdmi->vic);
1699         }
1700
1701         if ((hdmi->vic == 6) || (hdmi->vic == 7) ||
1702             (hdmi->vic == 21) || (hdmi->vic == 22) ||
1703             (hdmi->vic == 2) || (hdmi->vic == 3) ||
1704             (hdmi->vic == 17) || (hdmi->vic == 18))
1705                 hdmi->hdmi_data.enc_out_encoding = V4L2_YCBCR_ENC_601;
1706         else
1707                 hdmi->hdmi_data.enc_out_encoding = V4L2_YCBCR_ENC_709;
1708
1709         hdmi->hdmi_data.video_mode.mpixelrepetitionoutput = 0;
1710         hdmi->hdmi_data.video_mode.mpixelrepetitioninput = 0;
1711
1712         /* TOFIX: Get input format from plat data or fallback to RGB888 */
1713         if (hdmi->plat_data->input_bus_format)
1714                 hdmi->hdmi_data.enc_in_bus_format =
1715                         hdmi->plat_data->input_bus_format;
1716         else
1717                 hdmi->hdmi_data.enc_in_bus_format = MEDIA_BUS_FMT_RGB888_1X24;
1718
1719         /* TOFIX: Get input encoding from plat data or fallback to none */
1720         if (hdmi->plat_data->input_bus_encoding)
1721                 hdmi->hdmi_data.enc_in_encoding =
1722                         hdmi->plat_data->input_bus_encoding;
1723         else
1724                 hdmi->hdmi_data.enc_in_encoding = V4L2_YCBCR_ENC_DEFAULT;
1725
1726         /* TOFIX: Default to RGB888 output format */
1727         hdmi->hdmi_data.enc_out_bus_format = MEDIA_BUS_FMT_RGB888_1X24;
1728
1729         hdmi->hdmi_data.pix_repet_factor = 0;
1730         hdmi->hdmi_data.hdcp_enable = 0;
1731         hdmi->hdmi_data.video_mode.mdataenablepolarity = true;
1732
1733         /* HDMI Initialization Step B.1 */
1734         hdmi_av_composer(hdmi, mode);
1735
1736         /* HDMI Initializateion Step B.2 */
1737         ret = hdmi->phy.ops->init(hdmi, hdmi->phy.data, &hdmi->previous_mode);
1738         if (ret)
1739                 return ret;
1740         hdmi->phy.enabled = true;
1741
1742         /* HDMI Initialization Step B.3 */
1743         dw_hdmi_enable_video_path(hdmi);
1744
1745         if (hdmi->sink_has_audio) {
1746                 dev_dbg(hdmi->dev, "sink has audio support\n");
1747
1748                 /* HDMI Initialization Step E - Configure audio */
1749                 hdmi_clk_regenerator_update_pixel_clock(hdmi);
1750                 hdmi_enable_audio_clk(hdmi, true);
1751         }
1752
1753         /* not for DVI mode */
1754         if (hdmi->sink_is_hdmi) {
1755                 dev_dbg(hdmi->dev, "%s HDMI mode\n", __func__);
1756
1757                 /* HDMI Initialization Step F - Configure AVI InfoFrame */
1758                 hdmi_config_AVI(hdmi, mode);
1759                 hdmi_config_vendor_specific_infoframe(hdmi, mode);
1760         } else {
1761                 dev_dbg(hdmi->dev, "%s DVI mode\n", __func__);
1762         }
1763
1764         hdmi_video_packetize(hdmi);
1765         hdmi_video_csc(hdmi);
1766         hdmi_video_sample(hdmi);
1767         hdmi_tx_hdcp_config(hdmi);
1768
1769         dw_hdmi_clear_overflow(hdmi);
1770
1771         return 0;
1772 }
1773
1774 static void dw_hdmi_setup_i2c(struct dw_hdmi *hdmi)
1775 {
1776         hdmi_writeb(hdmi, HDMI_PHY_I2CM_INT_ADDR_DONE_POL,
1777                     HDMI_PHY_I2CM_INT_ADDR);
1778
1779         hdmi_writeb(hdmi, HDMI_PHY_I2CM_CTLINT_ADDR_NAC_POL |
1780                     HDMI_PHY_I2CM_CTLINT_ADDR_ARBITRATION_POL,
1781                     HDMI_PHY_I2CM_CTLINT_ADDR);
1782 }
1783
1784 static void initialize_hdmi_ih_mutes(struct dw_hdmi *hdmi)
1785 {
1786         u8 ih_mute;
1787
1788         /*
1789          * Boot up defaults are:
1790          * HDMI_IH_MUTE   = 0x03 (disabled)
1791          * HDMI_IH_MUTE_* = 0x00 (enabled)
1792          *
1793          * Disable top level interrupt bits in HDMI block
1794          */
1795         ih_mute = hdmi_readb(hdmi, HDMI_IH_MUTE) |
1796                   HDMI_IH_MUTE_MUTE_WAKEUP_INTERRUPT |
1797                   HDMI_IH_MUTE_MUTE_ALL_INTERRUPT;
1798
1799         hdmi_writeb(hdmi, ih_mute, HDMI_IH_MUTE);
1800
1801         /* by default mask all interrupts */
1802         hdmi_writeb(hdmi, 0xff, HDMI_VP_MASK);
1803         hdmi_writeb(hdmi, 0xff, HDMI_FC_MASK0);
1804         hdmi_writeb(hdmi, 0xff, HDMI_FC_MASK1);
1805         hdmi_writeb(hdmi, 0xff, HDMI_FC_MASK2);
1806         hdmi_writeb(hdmi, 0xff, HDMI_PHY_MASK0);
1807         hdmi_writeb(hdmi, 0xff, HDMI_PHY_I2CM_INT_ADDR);
1808         hdmi_writeb(hdmi, 0xff, HDMI_PHY_I2CM_CTLINT_ADDR);
1809         hdmi_writeb(hdmi, 0xff, HDMI_AUD_INT);
1810         hdmi_writeb(hdmi, 0xff, HDMI_AUD_SPDIFINT);
1811         hdmi_writeb(hdmi, 0xff, HDMI_AUD_HBR_MASK);
1812         hdmi_writeb(hdmi, 0xff, HDMI_GP_MASK);
1813         hdmi_writeb(hdmi, 0xff, HDMI_A_APIINTMSK);
1814         hdmi_writeb(hdmi, 0xff, HDMI_I2CM_INT);
1815         hdmi_writeb(hdmi, 0xff, HDMI_I2CM_CTLINT);
1816
1817         /* Disable interrupts in the IH_MUTE_* registers */
1818         hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_FC_STAT0);
1819         hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_FC_STAT1);
1820         hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_FC_STAT2);
1821         hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_AS_STAT0);
1822         hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_PHY_STAT0);
1823         hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_I2CM_STAT0);
1824         hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_CEC_STAT0);
1825         hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_VP_STAT0);
1826         hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_I2CMPHY_STAT0);
1827         hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_AHBDMAAUD_STAT0);
1828
1829         /* Enable top level interrupt bits in HDMI block */
1830         ih_mute &= ~(HDMI_IH_MUTE_MUTE_WAKEUP_INTERRUPT |
1831                     HDMI_IH_MUTE_MUTE_ALL_INTERRUPT);
1832         hdmi_writeb(hdmi, ih_mute, HDMI_IH_MUTE);
1833 }
1834
1835 static void dw_hdmi_poweron(struct dw_hdmi *hdmi)
1836 {
1837         hdmi->bridge_is_on = true;
1838         dw_hdmi_setup(hdmi, &hdmi->previous_mode);
1839 }
1840
1841 static void dw_hdmi_poweroff(struct dw_hdmi *hdmi)
1842 {
1843         if (hdmi->phy.enabled) {
1844                 hdmi->phy.ops->disable(hdmi, hdmi->phy.data);
1845                 hdmi->phy.enabled = false;
1846         }
1847
1848         hdmi->bridge_is_on = false;
1849 }
1850
1851 static void dw_hdmi_update_power(struct dw_hdmi *hdmi)
1852 {
1853         int force = hdmi->force;
1854
1855         if (hdmi->disabled) {
1856                 force = DRM_FORCE_OFF;
1857         } else if (force == DRM_FORCE_UNSPECIFIED) {
1858                 if (hdmi->rxsense)
1859                         force = DRM_FORCE_ON;
1860                 else
1861                         force = DRM_FORCE_OFF;
1862         }
1863
1864         if (force == DRM_FORCE_OFF) {
1865                 if (hdmi->bridge_is_on)
1866                         dw_hdmi_poweroff(hdmi);
1867         } else {
1868                 if (!hdmi->bridge_is_on)
1869                         dw_hdmi_poweron(hdmi);
1870         }
1871 }
1872
1873 /*
1874  * Adjust the detection of RXSENSE according to whether we have a forced
1875  * connection mode enabled, or whether we have been disabled.  There is
1876  * no point processing RXSENSE interrupts if we have a forced connection
1877  * state, or DRM has us disabled.
1878  *
1879  * We also disable rxsense interrupts when we think we're disconnected
1880  * to avoid floating TDMS signals giving false rxsense interrupts.
1881  *
1882  * Note: we still need to listen for HPD interrupts even when DRM has us
1883  * disabled so that we can detect a connect event.
1884  */
1885 static void dw_hdmi_update_phy_mask(struct dw_hdmi *hdmi)
1886 {
1887         if (hdmi->phy.ops->update_hpd)
1888                 hdmi->phy.ops->update_hpd(hdmi, hdmi->phy.data,
1889                                           hdmi->force, hdmi->disabled,
1890                                           hdmi->rxsense);
1891 }
1892
1893 static enum drm_connector_status
1894 dw_hdmi_connector_detect(struct drm_connector *connector, bool force)
1895 {
1896         struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
1897                                              connector);
1898
1899         mutex_lock(&hdmi->mutex);
1900         hdmi->force = DRM_FORCE_UNSPECIFIED;
1901         dw_hdmi_update_power(hdmi);
1902         dw_hdmi_update_phy_mask(hdmi);
1903         mutex_unlock(&hdmi->mutex);
1904
1905         return hdmi->phy.ops->read_hpd(hdmi, hdmi->phy.data);
1906 }
1907
1908 static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
1909 {
1910         struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
1911                                              connector);
1912         struct edid *edid;
1913         int ret = 0;
1914
1915         if (!hdmi->ddc)
1916                 return 0;
1917
1918         edid = drm_get_edid(connector, hdmi->ddc);
1919         if (edid) {
1920                 dev_dbg(hdmi->dev, "got edid: width[%d] x height[%d]\n",
1921                         edid->width_cm, edid->height_cm);
1922
1923                 hdmi->sink_is_hdmi = drm_detect_hdmi_monitor(edid);
1924                 hdmi->sink_has_audio = drm_detect_monitor_audio(edid);
1925                 drm_connector_update_edid_property(connector, edid);
1926                 cec_notifier_set_phys_addr_from_edid(hdmi->cec_notifier, edid);
1927                 ret = drm_add_edid_modes(connector, edid);
1928                 kfree(edid);
1929         } else {
1930                 dev_dbg(hdmi->dev, "failed to get edid\n");
1931         }
1932
1933         return ret;
1934 }
1935
1936 static void dw_hdmi_connector_force(struct drm_connector *connector)
1937 {
1938         struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
1939                                              connector);
1940
1941         mutex_lock(&hdmi->mutex);
1942         hdmi->force = connector->force;
1943         dw_hdmi_update_power(hdmi);
1944         dw_hdmi_update_phy_mask(hdmi);
1945         mutex_unlock(&hdmi->mutex);
1946 }
1947
1948 static const struct drm_connector_funcs dw_hdmi_connector_funcs = {
1949         .fill_modes = drm_helper_probe_single_connector_modes,
1950         .detect = dw_hdmi_connector_detect,
1951         .destroy = drm_connector_cleanup,
1952         .force = dw_hdmi_connector_force,
1953         .reset = drm_atomic_helper_connector_reset,
1954         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
1955         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
1956 };
1957
1958 static const struct drm_connector_helper_funcs dw_hdmi_connector_helper_funcs = {
1959         .get_modes = dw_hdmi_connector_get_modes,
1960         .best_encoder = drm_atomic_helper_best_encoder,
1961 };
1962
1963 static int dw_hdmi_bridge_attach(struct drm_bridge *bridge)
1964 {
1965         struct dw_hdmi *hdmi = bridge->driver_private;
1966         struct drm_encoder *encoder = bridge->encoder;
1967         struct drm_connector *connector = &hdmi->connector;
1968
1969         connector->interlace_allowed = 1;
1970         connector->polled = DRM_CONNECTOR_POLL_HPD;
1971
1972         drm_connector_helper_add(connector, &dw_hdmi_connector_helper_funcs);
1973
1974         drm_connector_init(bridge->dev, connector, &dw_hdmi_connector_funcs,
1975                            DRM_MODE_CONNECTOR_HDMIA);
1976
1977         drm_connector_attach_encoder(connector, encoder);
1978
1979         return 0;
1980 }
1981
1982 static enum drm_mode_status
1983 dw_hdmi_bridge_mode_valid(struct drm_bridge *bridge,
1984                           const struct drm_display_mode *mode)
1985 {
1986         struct dw_hdmi *hdmi = bridge->driver_private;
1987         struct drm_connector *connector = &hdmi->connector;
1988         enum drm_mode_status mode_status = MODE_OK;
1989
1990         /* We don't support double-clocked modes */
1991         if (mode->flags & DRM_MODE_FLAG_DBLCLK)
1992                 return MODE_BAD;
1993
1994         if (hdmi->plat_data->mode_valid)
1995                 mode_status = hdmi->plat_data->mode_valid(connector, mode);
1996
1997         return mode_status;
1998 }
1999
2000 static void dw_hdmi_bridge_mode_set(struct drm_bridge *bridge,
2001                                     struct drm_display_mode *orig_mode,
2002                                     struct drm_display_mode *mode)
2003 {
2004         struct dw_hdmi *hdmi = bridge->driver_private;
2005
2006         mutex_lock(&hdmi->mutex);
2007
2008         /* Store the display mode for plugin/DKMS poweron events */
2009         memcpy(&hdmi->previous_mode, mode, sizeof(hdmi->previous_mode));
2010
2011         mutex_unlock(&hdmi->mutex);
2012 }
2013
2014 static void dw_hdmi_bridge_disable(struct drm_bridge *bridge)
2015 {
2016         struct dw_hdmi *hdmi = bridge->driver_private;
2017
2018         mutex_lock(&hdmi->mutex);
2019         hdmi->disabled = true;
2020         dw_hdmi_update_power(hdmi);
2021         dw_hdmi_update_phy_mask(hdmi);
2022         mutex_unlock(&hdmi->mutex);
2023 }
2024
2025 static void dw_hdmi_bridge_enable(struct drm_bridge *bridge)
2026 {
2027         struct dw_hdmi *hdmi = bridge->driver_private;
2028
2029         mutex_lock(&hdmi->mutex);
2030         hdmi->disabled = false;
2031         dw_hdmi_update_power(hdmi);
2032         dw_hdmi_update_phy_mask(hdmi);
2033         mutex_unlock(&hdmi->mutex);
2034 }
2035
2036 static const struct drm_bridge_funcs dw_hdmi_bridge_funcs = {
2037         .attach = dw_hdmi_bridge_attach,
2038         .enable = dw_hdmi_bridge_enable,
2039         .disable = dw_hdmi_bridge_disable,
2040         .mode_set = dw_hdmi_bridge_mode_set,
2041         .mode_valid = dw_hdmi_bridge_mode_valid,
2042 };
2043
2044 static irqreturn_t dw_hdmi_i2c_irq(struct dw_hdmi *hdmi)
2045 {
2046         struct dw_hdmi_i2c *i2c = hdmi->i2c;
2047         unsigned int stat;
2048
2049         stat = hdmi_readb(hdmi, HDMI_IH_I2CM_STAT0);
2050         if (!stat)
2051                 return IRQ_NONE;
2052
2053         hdmi_writeb(hdmi, stat, HDMI_IH_I2CM_STAT0);
2054
2055         i2c->stat = stat;
2056
2057         complete(&i2c->cmp);
2058
2059         return IRQ_HANDLED;
2060 }
2061
2062 static irqreturn_t dw_hdmi_hardirq(int irq, void *dev_id)
2063 {
2064         struct dw_hdmi *hdmi = dev_id;
2065         u8 intr_stat;
2066         irqreturn_t ret = IRQ_NONE;
2067
2068         if (hdmi->i2c)
2069                 ret = dw_hdmi_i2c_irq(hdmi);
2070
2071         intr_stat = hdmi_readb(hdmi, HDMI_IH_PHY_STAT0);
2072         if (intr_stat) {
2073                 hdmi_writeb(hdmi, ~0, HDMI_IH_MUTE_PHY_STAT0);
2074                 return IRQ_WAKE_THREAD;
2075         }
2076
2077         return ret;
2078 }
2079
2080 void dw_hdmi_setup_rx_sense(struct dw_hdmi *hdmi, bool hpd, bool rx_sense)
2081 {
2082         mutex_lock(&hdmi->mutex);
2083
2084         if (!hdmi->force) {
2085                 /*
2086                  * If the RX sense status indicates we're disconnected,
2087                  * clear the software rxsense status.
2088                  */
2089                 if (!rx_sense)
2090                         hdmi->rxsense = false;
2091
2092                 /*
2093                  * Only set the software rxsense status when both
2094                  * rxsense and hpd indicates we're connected.
2095                  * This avoids what seems to be bad behaviour in
2096                  * at least iMX6S versions of the phy.
2097                  */
2098                 if (hpd)
2099                         hdmi->rxsense = true;
2100
2101                 dw_hdmi_update_power(hdmi);
2102                 dw_hdmi_update_phy_mask(hdmi);
2103         }
2104         mutex_unlock(&hdmi->mutex);
2105 }
2106 EXPORT_SYMBOL_GPL(dw_hdmi_setup_rx_sense);
2107
2108 static irqreturn_t dw_hdmi_irq(int irq, void *dev_id)
2109 {
2110         struct dw_hdmi *hdmi = dev_id;
2111         u8 intr_stat, phy_int_pol, phy_pol_mask, phy_stat;
2112
2113         intr_stat = hdmi_readb(hdmi, HDMI_IH_PHY_STAT0);
2114         phy_int_pol = hdmi_readb(hdmi, HDMI_PHY_POL0);
2115         phy_stat = hdmi_readb(hdmi, HDMI_PHY_STAT0);
2116
2117         phy_pol_mask = 0;
2118         if (intr_stat & HDMI_IH_PHY_STAT0_HPD)
2119                 phy_pol_mask |= HDMI_PHY_HPD;
2120         if (intr_stat & HDMI_IH_PHY_STAT0_RX_SENSE0)
2121                 phy_pol_mask |= HDMI_PHY_RX_SENSE0;
2122         if (intr_stat & HDMI_IH_PHY_STAT0_RX_SENSE1)
2123                 phy_pol_mask |= HDMI_PHY_RX_SENSE1;
2124         if (intr_stat & HDMI_IH_PHY_STAT0_RX_SENSE2)
2125                 phy_pol_mask |= HDMI_PHY_RX_SENSE2;
2126         if (intr_stat & HDMI_IH_PHY_STAT0_RX_SENSE3)
2127                 phy_pol_mask |= HDMI_PHY_RX_SENSE3;
2128
2129         if (phy_pol_mask)
2130                 hdmi_modb(hdmi, ~phy_int_pol, phy_pol_mask, HDMI_PHY_POL0);
2131
2132         /*
2133          * RX sense tells us whether the TDMS transmitters are detecting
2134          * load - in other words, there's something listening on the
2135          * other end of the link.  Use this to decide whether we should
2136          * power on the phy as HPD may be toggled by the sink to merely
2137          * ask the source to re-read the EDID.
2138          */
2139         if (intr_stat &
2140             (HDMI_IH_PHY_STAT0_RX_SENSE | HDMI_IH_PHY_STAT0_HPD)) {
2141                 dw_hdmi_setup_rx_sense(hdmi,
2142                                        phy_stat & HDMI_PHY_HPD,
2143                                        phy_stat & HDMI_PHY_RX_SENSE);
2144
2145                 if ((phy_stat & (HDMI_PHY_RX_SENSE | HDMI_PHY_HPD)) == 0)
2146                         cec_notifier_set_phys_addr(hdmi->cec_notifier,
2147                                                    CEC_PHYS_ADDR_INVALID);
2148         }
2149
2150         if (intr_stat & HDMI_IH_PHY_STAT0_HPD) {
2151                 dev_dbg(hdmi->dev, "EVENT=%s\n",
2152                         phy_int_pol & HDMI_PHY_HPD ? "plugin" : "plugout");
2153                 if (hdmi->bridge.dev)
2154                         drm_helper_hpd_irq_event(hdmi->bridge.dev);
2155         }
2156
2157         hdmi_writeb(hdmi, intr_stat, HDMI_IH_PHY_STAT0);
2158         hdmi_writeb(hdmi, ~(HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE),
2159                     HDMI_IH_MUTE_PHY_STAT0);
2160
2161         return IRQ_HANDLED;
2162 }
2163
2164 static const struct dw_hdmi_phy_data dw_hdmi_phys[] = {
2165         {
2166                 .type = DW_HDMI_PHY_DWC_HDMI_TX_PHY,
2167                 .name = "DWC HDMI TX PHY",
2168                 .gen = 1,
2169         }, {
2170                 .type = DW_HDMI_PHY_DWC_MHL_PHY_HEAC,
2171                 .name = "DWC MHL PHY + HEAC PHY",
2172                 .gen = 2,
2173                 .has_svsret = true,
2174                 .configure = hdmi_phy_configure_dwc_hdmi_3d_tx,
2175         }, {
2176                 .type = DW_HDMI_PHY_DWC_MHL_PHY,
2177                 .name = "DWC MHL PHY",
2178                 .gen = 2,
2179                 .has_svsret = true,
2180                 .configure = hdmi_phy_configure_dwc_hdmi_3d_tx,
2181         }, {
2182                 .type = DW_HDMI_PHY_DWC_HDMI_3D_TX_PHY_HEAC,
2183                 .name = "DWC HDMI 3D TX PHY + HEAC PHY",
2184                 .gen = 2,
2185                 .configure = hdmi_phy_configure_dwc_hdmi_3d_tx,
2186         }, {
2187                 .type = DW_HDMI_PHY_DWC_HDMI_3D_TX_PHY,
2188                 .name = "DWC HDMI 3D TX PHY",
2189                 .gen = 2,
2190                 .configure = hdmi_phy_configure_dwc_hdmi_3d_tx,
2191         }, {
2192                 .type = DW_HDMI_PHY_DWC_HDMI20_TX_PHY,
2193                 .name = "DWC HDMI 2.0 TX PHY",
2194                 .gen = 2,
2195                 .has_svsret = true,
2196                 .configure = hdmi_phy_configure_dwc_hdmi_3d_tx,
2197         }, {
2198                 .type = DW_HDMI_PHY_VENDOR_PHY,
2199                 .name = "Vendor PHY",
2200         }
2201 };
2202
2203 static int dw_hdmi_detect_phy(struct dw_hdmi *hdmi)
2204 {
2205         unsigned int i;
2206         u8 phy_type;
2207
2208         phy_type = hdmi_readb(hdmi, HDMI_CONFIG2_ID);
2209
2210         if (phy_type == DW_HDMI_PHY_VENDOR_PHY) {
2211                 /* Vendor PHYs require support from the glue layer. */
2212                 if (!hdmi->plat_data->phy_ops || !hdmi->plat_data->phy_name) {
2213                         dev_err(hdmi->dev,
2214                                 "Vendor HDMI PHY not supported by glue layer\n");
2215                         return -ENODEV;
2216                 }
2217
2218                 hdmi->phy.ops = hdmi->plat_data->phy_ops;
2219                 hdmi->phy.data = hdmi->plat_data->phy_data;
2220                 hdmi->phy.name = hdmi->plat_data->phy_name;
2221                 return 0;
2222         }
2223
2224         /* Synopsys PHYs are handled internally. */
2225         for (i = 0; i < ARRAY_SIZE(dw_hdmi_phys); ++i) {
2226                 if (dw_hdmi_phys[i].type == phy_type) {
2227                         hdmi->phy.ops = &dw_hdmi_synopsys_phy_ops;
2228                         hdmi->phy.name = dw_hdmi_phys[i].name;
2229                         hdmi->phy.data = (void *)&dw_hdmi_phys[i];
2230
2231                         if (!dw_hdmi_phys[i].configure &&
2232                             !hdmi->plat_data->configure_phy) {
2233                                 dev_err(hdmi->dev, "%s requires platform support\n",
2234                                         hdmi->phy.name);
2235                                 return -ENODEV;
2236                         }
2237
2238                         return 0;
2239                 }
2240         }
2241
2242         dev_err(hdmi->dev, "Unsupported HDMI PHY type (%02x)\n", phy_type);
2243         return -ENODEV;
2244 }
2245
2246 static void dw_hdmi_cec_enable(struct dw_hdmi *hdmi)
2247 {
2248         mutex_lock(&hdmi->mutex);
2249         hdmi->mc_clkdis &= ~HDMI_MC_CLKDIS_CECCLK_DISABLE;
2250         hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS);
2251         mutex_unlock(&hdmi->mutex);
2252 }
2253
2254 static void dw_hdmi_cec_disable(struct dw_hdmi *hdmi)
2255 {
2256         mutex_lock(&hdmi->mutex);
2257         hdmi->mc_clkdis |= HDMI_MC_CLKDIS_CECCLK_DISABLE;
2258         hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS);
2259         mutex_unlock(&hdmi->mutex);
2260 }
2261
2262 static const struct dw_hdmi_cec_ops dw_hdmi_cec_ops = {
2263         .write = hdmi_writeb,
2264         .read = hdmi_readb,
2265         .enable = dw_hdmi_cec_enable,
2266         .disable = dw_hdmi_cec_disable,
2267 };
2268
2269 static const struct regmap_config hdmi_regmap_8bit_config = {
2270         .reg_bits       = 32,
2271         .val_bits       = 8,
2272         .reg_stride     = 1,
2273         .max_register   = HDMI_I2CM_FS_SCL_LCNT_0_ADDR,
2274 };
2275
2276 static const struct regmap_config hdmi_regmap_32bit_config = {
2277         .reg_bits       = 32,
2278         .val_bits       = 32,
2279         .reg_stride     = 4,
2280         .max_register   = HDMI_I2CM_FS_SCL_LCNT_0_ADDR << 2,
2281 };
2282
2283 static struct dw_hdmi *
2284 __dw_hdmi_probe(struct platform_device *pdev,
2285                 const struct dw_hdmi_plat_data *plat_data)
2286 {
2287         struct device *dev = &pdev->dev;
2288         struct device_node *np = dev->of_node;
2289         struct platform_device_info pdevinfo;
2290         struct device_node *ddc_node;
2291         struct dw_hdmi_cec_data cec;
2292         struct dw_hdmi *hdmi;
2293         struct resource *iores = NULL;
2294         int irq;
2295         int ret;
2296         u32 val = 1;
2297         u8 prod_id0;
2298         u8 prod_id1;
2299         u8 config0;
2300         u8 config3;
2301
2302         hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL);
2303         if (!hdmi)
2304                 return ERR_PTR(-ENOMEM);
2305
2306         hdmi->plat_data = plat_data;
2307         hdmi->dev = dev;
2308         hdmi->sample_rate = 48000;
2309         hdmi->disabled = true;
2310         hdmi->rxsense = true;
2311         hdmi->phy_mask = (u8)~(HDMI_PHY_HPD | HDMI_PHY_RX_SENSE);
2312         hdmi->mc_clkdis = 0x7f;
2313
2314         mutex_init(&hdmi->mutex);
2315         mutex_init(&hdmi->audio_mutex);
2316         spin_lock_init(&hdmi->audio_lock);
2317
2318         ddc_node = of_parse_phandle(np, "ddc-i2c-bus", 0);
2319         if (ddc_node) {
2320                 hdmi->ddc = of_get_i2c_adapter_by_node(ddc_node);
2321                 of_node_put(ddc_node);
2322                 if (!hdmi->ddc) {
2323                         dev_dbg(hdmi->dev, "failed to read ddc node\n");
2324                         return ERR_PTR(-EPROBE_DEFER);
2325                 }
2326
2327         } else {
2328                 dev_dbg(hdmi->dev, "no ddc property found\n");
2329         }
2330
2331         if (!plat_data->regm) {
2332                 const struct regmap_config *reg_config;
2333
2334                 of_property_read_u32(np, "reg-io-width", &val);
2335                 switch (val) {
2336                 case 4:
2337                         reg_config = &hdmi_regmap_32bit_config;
2338                         hdmi->reg_shift = 2;
2339                         break;
2340                 case 1:
2341                         reg_config = &hdmi_regmap_8bit_config;
2342                         break;
2343                 default:
2344                         dev_err(dev, "reg-io-width must be 1 or 4\n");
2345                         return ERR_PTR(-EINVAL);
2346                 }
2347
2348                 iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2349                 hdmi->regs = devm_ioremap_resource(dev, iores);
2350                 if (IS_ERR(hdmi->regs)) {
2351                         ret = PTR_ERR(hdmi->regs);
2352                         goto err_res;
2353                 }
2354
2355                 hdmi->regm = devm_regmap_init_mmio(dev, hdmi->regs, reg_config);
2356                 if (IS_ERR(hdmi->regm)) {
2357                         dev_err(dev, "Failed to configure regmap\n");
2358                         ret = PTR_ERR(hdmi->regm);
2359                         goto err_res;
2360                 }
2361         } else {
2362                 hdmi->regm = plat_data->regm;
2363         }
2364
2365         hdmi->isfr_clk = devm_clk_get(hdmi->dev, "isfr");
2366         if (IS_ERR(hdmi->isfr_clk)) {
2367                 ret = PTR_ERR(hdmi->isfr_clk);
2368                 dev_err(hdmi->dev, "Unable to get HDMI isfr clk: %d\n", ret);
2369                 goto err_res;
2370         }
2371
2372         ret = clk_prepare_enable(hdmi->isfr_clk);
2373         if (ret) {
2374                 dev_err(hdmi->dev, "Cannot enable HDMI isfr clock: %d\n", ret);
2375                 goto err_res;
2376         }
2377
2378         hdmi->iahb_clk = devm_clk_get(hdmi->dev, "iahb");
2379         if (IS_ERR(hdmi->iahb_clk)) {
2380                 ret = PTR_ERR(hdmi->iahb_clk);
2381                 dev_err(hdmi->dev, "Unable to get HDMI iahb clk: %d\n", ret);
2382                 goto err_isfr;
2383         }
2384
2385         ret = clk_prepare_enable(hdmi->iahb_clk);
2386         if (ret) {
2387                 dev_err(hdmi->dev, "Cannot enable HDMI iahb clock: %d\n", ret);
2388                 goto err_isfr;
2389         }
2390
2391         hdmi->cec_clk = devm_clk_get(hdmi->dev, "cec");
2392         if (PTR_ERR(hdmi->cec_clk) == -ENOENT) {
2393                 hdmi->cec_clk = NULL;
2394         } else if (IS_ERR(hdmi->cec_clk)) {
2395                 ret = PTR_ERR(hdmi->cec_clk);
2396                 if (ret != -EPROBE_DEFER)
2397                         dev_err(hdmi->dev, "Cannot get HDMI cec clock: %d\n",
2398                                 ret);
2399
2400                 hdmi->cec_clk = NULL;
2401                 goto err_iahb;
2402         } else {
2403                 ret = clk_prepare_enable(hdmi->cec_clk);
2404                 if (ret) {
2405                         dev_err(hdmi->dev, "Cannot enable HDMI cec clock: %d\n",
2406                                 ret);
2407                         goto err_iahb;
2408                 }
2409         }
2410
2411         /* Product and revision IDs */
2412         hdmi->version = (hdmi_readb(hdmi, HDMI_DESIGN_ID) << 8)
2413                       | (hdmi_readb(hdmi, HDMI_REVISION_ID) << 0);
2414         prod_id0 = hdmi_readb(hdmi, HDMI_PRODUCT_ID0);
2415         prod_id1 = hdmi_readb(hdmi, HDMI_PRODUCT_ID1);
2416
2417         if (prod_id0 != HDMI_PRODUCT_ID0_HDMI_TX ||
2418             (prod_id1 & ~HDMI_PRODUCT_ID1_HDCP) != HDMI_PRODUCT_ID1_HDMI_TX) {
2419                 dev_err(dev, "Unsupported HDMI controller (%04x:%02x:%02x)\n",
2420                         hdmi->version, prod_id0, prod_id1);
2421                 ret = -ENODEV;
2422                 goto err_iahb;
2423         }
2424
2425         ret = dw_hdmi_detect_phy(hdmi);
2426         if (ret < 0)
2427                 goto err_iahb;
2428
2429         dev_info(dev, "Detected HDMI TX controller v%x.%03x %s HDCP (%s)\n",
2430                  hdmi->version >> 12, hdmi->version & 0xfff,
2431                  prod_id1 & HDMI_PRODUCT_ID1_HDCP ? "with" : "without",
2432                  hdmi->phy.name);
2433
2434         initialize_hdmi_ih_mutes(hdmi);
2435
2436         irq = platform_get_irq(pdev, 0);
2437         if (irq < 0) {
2438                 ret = irq;
2439                 goto err_iahb;
2440         }
2441
2442         ret = devm_request_threaded_irq(dev, irq, dw_hdmi_hardirq,
2443                                         dw_hdmi_irq, IRQF_SHARED,
2444                                         dev_name(dev), hdmi);
2445         if (ret)
2446                 goto err_iahb;
2447
2448         hdmi->cec_notifier = cec_notifier_get(dev);
2449         if (!hdmi->cec_notifier) {
2450                 ret = -ENOMEM;
2451                 goto err_iahb;
2452         }
2453
2454         /*
2455          * To prevent overflows in HDMI_IH_FC_STAT2, set the clk regenerator
2456          * N and cts values before enabling phy
2457          */
2458         hdmi_init_clk_regenerator(hdmi);
2459
2460         /* If DDC bus is not specified, try to register HDMI I2C bus */
2461         if (!hdmi->ddc) {
2462                 hdmi->ddc = dw_hdmi_i2c_adapter(hdmi);
2463                 if (IS_ERR(hdmi->ddc))
2464                         hdmi->ddc = NULL;
2465         }
2466
2467         hdmi->bridge.driver_private = hdmi;
2468         hdmi->bridge.funcs = &dw_hdmi_bridge_funcs;
2469 #ifdef CONFIG_OF
2470         hdmi->bridge.of_node = pdev->dev.of_node;
2471 #endif
2472
2473         dw_hdmi_setup_i2c(hdmi);
2474         if (hdmi->phy.ops->setup_hpd)
2475                 hdmi->phy.ops->setup_hpd(hdmi, hdmi->phy.data);
2476
2477         memset(&pdevinfo, 0, sizeof(pdevinfo));
2478         pdevinfo.parent = dev;
2479         pdevinfo.id = PLATFORM_DEVID_AUTO;
2480
2481         config0 = hdmi_readb(hdmi, HDMI_CONFIG0_ID);
2482         config3 = hdmi_readb(hdmi, HDMI_CONFIG3_ID);
2483
2484         if (iores && config3 & HDMI_CONFIG3_AHBAUDDMA) {
2485                 struct dw_hdmi_audio_data audio;
2486
2487                 audio.phys = iores->start;
2488                 audio.base = hdmi->regs;
2489                 audio.irq = irq;
2490                 audio.hdmi = hdmi;
2491                 audio.eld = hdmi->connector.eld;
2492                 hdmi->enable_audio = dw_hdmi_ahb_audio_enable;
2493                 hdmi->disable_audio = dw_hdmi_ahb_audio_disable;
2494
2495                 pdevinfo.name = "dw-hdmi-ahb-audio";
2496                 pdevinfo.data = &audio;
2497                 pdevinfo.size_data = sizeof(audio);
2498                 pdevinfo.dma_mask = DMA_BIT_MASK(32);
2499                 hdmi->audio = platform_device_register_full(&pdevinfo);
2500         } else if (config0 & HDMI_CONFIG0_I2S) {
2501                 struct dw_hdmi_i2s_audio_data audio;
2502
2503                 audio.hdmi      = hdmi;
2504                 audio.write     = hdmi_writeb;
2505                 audio.read      = hdmi_readb;
2506                 hdmi->enable_audio = dw_hdmi_i2s_audio_enable;
2507                 hdmi->disable_audio = dw_hdmi_i2s_audio_disable;
2508
2509                 pdevinfo.name = "dw-hdmi-i2s-audio";
2510                 pdevinfo.data = &audio;
2511                 pdevinfo.size_data = sizeof(audio);
2512                 pdevinfo.dma_mask = DMA_BIT_MASK(32);
2513                 hdmi->audio = platform_device_register_full(&pdevinfo);
2514         }
2515
2516         if (config0 & HDMI_CONFIG0_CEC) {
2517                 cec.hdmi = hdmi;
2518                 cec.ops = &dw_hdmi_cec_ops;
2519                 cec.irq = irq;
2520
2521                 pdevinfo.name = "dw-hdmi-cec";
2522                 pdevinfo.data = &cec;
2523                 pdevinfo.size_data = sizeof(cec);
2524                 pdevinfo.dma_mask = 0;
2525
2526                 hdmi->cec = platform_device_register_full(&pdevinfo);
2527         }
2528
2529         /* Reset HDMI DDC I2C master controller and mute I2CM interrupts */
2530         if (hdmi->i2c)
2531                 dw_hdmi_i2c_init(hdmi);
2532
2533         return hdmi;
2534
2535 err_iahb:
2536         if (hdmi->i2c) {
2537                 i2c_del_adapter(&hdmi->i2c->adap);
2538                 hdmi->ddc = NULL;
2539         }
2540
2541         if (hdmi->cec_notifier)
2542                 cec_notifier_put(hdmi->cec_notifier);
2543
2544         clk_disable_unprepare(hdmi->iahb_clk);
2545         if (hdmi->cec_clk)
2546                 clk_disable_unprepare(hdmi->cec_clk);
2547 err_isfr:
2548         clk_disable_unprepare(hdmi->isfr_clk);
2549 err_res:
2550         i2c_put_adapter(hdmi->ddc);
2551
2552         return ERR_PTR(ret);
2553 }
2554
2555 static void __dw_hdmi_remove(struct dw_hdmi *hdmi)
2556 {
2557         if (hdmi->audio && !IS_ERR(hdmi->audio))
2558                 platform_device_unregister(hdmi->audio);
2559         if (!IS_ERR(hdmi->cec))
2560                 platform_device_unregister(hdmi->cec);
2561
2562         /* Disable all interrupts */
2563         hdmi_writeb(hdmi, ~0, HDMI_IH_MUTE_PHY_STAT0);
2564
2565         if (hdmi->cec_notifier)
2566                 cec_notifier_put(hdmi->cec_notifier);
2567
2568         clk_disable_unprepare(hdmi->iahb_clk);
2569         clk_disable_unprepare(hdmi->isfr_clk);
2570         if (hdmi->cec_clk)
2571                 clk_disable_unprepare(hdmi->cec_clk);
2572
2573         if (hdmi->i2c)
2574                 i2c_del_adapter(&hdmi->i2c->adap);
2575         else
2576                 i2c_put_adapter(hdmi->ddc);
2577 }
2578
2579 /* -----------------------------------------------------------------------------
2580  * Probe/remove API, used from platforms based on the DRM bridge API.
2581  */
2582 struct dw_hdmi *dw_hdmi_probe(struct platform_device *pdev,
2583                               const struct dw_hdmi_plat_data *plat_data)
2584 {
2585         struct dw_hdmi *hdmi;
2586
2587         hdmi = __dw_hdmi_probe(pdev, plat_data);
2588         if (IS_ERR(hdmi))
2589                 return hdmi;
2590
2591         drm_bridge_add(&hdmi->bridge);
2592
2593         return hdmi;
2594 }
2595 EXPORT_SYMBOL_GPL(dw_hdmi_probe);
2596
2597 void dw_hdmi_remove(struct dw_hdmi *hdmi)
2598 {
2599         drm_bridge_remove(&hdmi->bridge);
2600
2601         __dw_hdmi_remove(hdmi);
2602 }
2603 EXPORT_SYMBOL_GPL(dw_hdmi_remove);
2604
2605 /* -----------------------------------------------------------------------------
2606  * Bind/unbind API, used from platforms based on the component framework.
2607  */
2608 struct dw_hdmi *dw_hdmi_bind(struct platform_device *pdev,
2609                              struct drm_encoder *encoder,
2610                              const struct dw_hdmi_plat_data *plat_data)
2611 {
2612         struct dw_hdmi *hdmi;
2613         int ret;
2614
2615         hdmi = __dw_hdmi_probe(pdev, plat_data);
2616         if (IS_ERR(hdmi))
2617                 return hdmi;
2618
2619         ret = drm_bridge_attach(encoder, &hdmi->bridge, NULL);
2620         if (ret) {
2621                 dw_hdmi_remove(hdmi);
2622                 DRM_ERROR("Failed to initialize bridge with drm\n");
2623                 return ERR_PTR(ret);
2624         }
2625
2626         return hdmi;
2627 }
2628 EXPORT_SYMBOL_GPL(dw_hdmi_bind);
2629
2630 void dw_hdmi_unbind(struct dw_hdmi *hdmi)
2631 {
2632         __dw_hdmi_remove(hdmi);
2633 }
2634 EXPORT_SYMBOL_GPL(dw_hdmi_unbind);
2635
2636 MODULE_AUTHOR("Sascha Hauer <[email protected]>");
2637 MODULE_AUTHOR("Andy Yan <[email protected]>");
2638 MODULE_AUTHOR("Yakir Yang <[email protected]>");
2639 MODULE_AUTHOR("Vladimir Zapolskiy <[email protected]>");
2640 MODULE_DESCRIPTION("DW HDMI transmitter driver");
2641 MODULE_LICENSE("GPL");
2642 MODULE_ALIAS("platform:dw-hdmi");