1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * DesignWare High-Definition Multimedia Interface (HDMI) driver 4 * 5 * Copyright (C) 2013-2015 Mentor Graphics Inc. 6 * Copyright (C) 2011-2013 Freescale Semiconductor, Inc. 7 * Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de> 8 */ 9 #include <linux/clk.h> 10 #include <linux/delay.h> 11 #include <linux/err.h> 12 #include <linux/hdmi.h> 13 #include <linux/irq.h> 14 #include <linux/module.h> 15 #include <linux/mutex.h> 16 #include <linux/of_device.h> 17 #include <linux/pinctrl/consumer.h> 18 #include <linux/regmap.h> 19 #include <linux/dma-mapping.h> 20 #include <linux/spinlock.h> 21 22 #include <media/cec-notifier.h> 23 24 #include <uapi/linux/media-bus-format.h> 25 #include <uapi/linux/videodev2.h> 26 27 #include <drm/bridge/dw_hdmi.h> 28 #include <drm/drm_atomic.h> 29 #include <drm/drm_atomic_helper.h> 30 #include <drm/drm_bridge.h> 31 #include <drm/drm_edid.h> 32 #include <drm/drm_of.h> 33 #include <drm/drm_print.h> 34 #include <drm/drm_probe_helper.h> 35 #include <drm/drm_scdc_helper.h> 36 37 #include "dw-hdmi-audio.h" 38 #include "dw-hdmi-cec.h" 39 #include "dw-hdmi.h" 40 41 #define DDC_CI_ADDR 0x37 42 #define DDC_SEGMENT_ADDR 0x30 43 44 #define HDMI_EDID_LEN 512 45 46 /* DW-HDMI Controller >= 0x200a are at least compliant with SCDC version 1 */ 47 #define SCDC_MIN_SOURCE_VERSION 0x1 48 49 #define HDMI14_MAX_TMDSCLK 340000000 50 51 enum hdmi_datamap { 52 RGB444_8B = 0x01, 53 RGB444_10B = 0x03, 54 RGB444_12B = 0x05, 55 RGB444_16B = 0x07, 56 YCbCr444_8B = 0x09, 57 YCbCr444_10B = 0x0B, 58 YCbCr444_12B = 0x0D, 59 YCbCr444_16B = 0x0F, 60 YCbCr422_8B = 0x16, 61 YCbCr422_10B = 0x14, 62 YCbCr422_12B = 0x12, 63 }; 64 65 static const u16 csc_coeff_default[3][4] = { 66 { 0x2000, 0x0000, 0x0000, 0x0000 }, 67 { 0x0000, 0x2000, 0x0000, 0x0000 }, 68 { 0x0000, 0x0000, 0x2000, 0x0000 } 69 }; 70 71 static const u16 csc_coeff_rgb_out_eitu601[3][4] = { 72 { 0x2000, 0x6926, 0x74fd, 0x010e }, 73 { 0x2000, 0x2cdd, 0x0000, 0x7e9a }, 74 { 0x2000, 0x0000, 0x38b4, 0x7e3b } 75 }; 76 77 static const u16 csc_coeff_rgb_out_eitu709[3][4] = { 78 { 0x2000, 0x7106, 0x7a02, 0x00a7 }, 79 { 0x2000, 0x3264, 0x0000, 0x7e6d }, 80 { 0x2000, 0x0000, 0x3b61, 0x7e25 } 81 }; 82 83 static const u16 csc_coeff_rgb_in_eitu601[3][4] = { 84 { 0x2591, 0x1322, 0x074b, 0x0000 }, 85 { 0x6535, 0x2000, 0x7acc, 0x0200 }, 86 { 0x6acd, 0x7534, 0x2000, 0x0200 } 87 }; 88 89 static const u16 csc_coeff_rgb_in_eitu709[3][4] = { 90 { 0x2dc5, 0x0d9b, 0x049e, 0x0000 }, 91 { 0x62f0, 0x2000, 0x7d11, 0x0200 }, 92 { 0x6756, 0x78ab, 0x2000, 0x0200 } 93 }; 94 95 static const u16 csc_coeff_rgb_full_to_rgb_limited[3][4] = { 96 { 0x1b7c, 0x0000, 0x0000, 0x0020 }, 97 { 0x0000, 0x1b7c, 0x0000, 0x0020 }, 98 { 0x0000, 0x0000, 0x1b7c, 0x0020 } 99 }; 100 101 struct hdmi_vmode { 102 bool mdataenablepolarity; 103 104 unsigned int mpixelclock; 105 unsigned int mpixelrepetitioninput; 106 unsigned int mpixelrepetitionoutput; 107 unsigned int mtmdsclock; 108 }; 109 110 struct hdmi_data_info { 111 unsigned int enc_in_bus_format; 112 unsigned int enc_out_bus_format; 113 unsigned int enc_in_encoding; 114 unsigned int enc_out_encoding; 115 unsigned int pix_repet_factor; 116 unsigned int hdcp_enable; 117 struct hdmi_vmode video_mode; 118 bool rgb_limited_range; 119 }; 120 121 struct dw_hdmi_i2c { 122 struct i2c_adapter adap; 123 124 struct mutex lock; /* used to serialize data transfers */ 125 struct completion cmp; 126 u8 stat; 127 128 u8 slave_reg; 129 bool is_regaddr; 130 bool is_segment; 131 }; 132 133 struct dw_hdmi_phy_data { 134 enum dw_hdmi_phy_type type; 135 const char *name; 136 unsigned int gen; 137 bool has_svsret; 138 int (*configure)(struct dw_hdmi *hdmi, 139 const struct dw_hdmi_plat_data *pdata, 140 unsigned long mpixelclock); 141 }; 142 143 struct dw_hdmi { 144 struct drm_connector connector; 145 struct drm_bridge bridge; 146 struct drm_bridge *next_bridge; 147 148 unsigned int version; 149 150 struct platform_device *audio; 151 struct platform_device *cec; 152 struct device *dev; 153 struct clk *isfr_clk; 154 struct clk *iahb_clk; 155 struct clk *cec_clk; 156 struct dw_hdmi_i2c *i2c; 157 158 struct hdmi_data_info hdmi_data; 159 const struct dw_hdmi_plat_data *plat_data; 160 161 int vic; 162 163 u8 edid[HDMI_EDID_LEN]; 164 165 struct { 166 const struct dw_hdmi_phy_ops *ops; 167 const char *name; 168 void *data; 169 bool enabled; 170 } phy; 171 172 struct drm_display_mode previous_mode; 173 174 struct i2c_adapter *ddc; 175 void __iomem *regs; 176 bool sink_is_hdmi; 177 bool sink_has_audio; 178 179 struct pinctrl *pinctrl; 180 struct pinctrl_state *default_state; 181 struct pinctrl_state *unwedge_state; 182 183 struct mutex mutex; /* for state below and previous_mode */ 184 enum drm_connector_force force; /* mutex-protected force state */ 185 struct drm_connector *curr_conn;/* current connector (only valid when !disabled) */ 186 bool disabled; /* DRM has disabled our bridge */ 187 bool bridge_is_on; /* indicates the bridge is on */ 188 bool rxsense; /* rxsense state */ 189 u8 phy_mask; /* desired phy int mask settings */ 190 u8 mc_clkdis; /* clock disable register */ 191 192 spinlock_t audio_lock; 193 struct mutex audio_mutex; 194 unsigned int sample_rate; 195 unsigned int audio_cts; 196 unsigned int audio_n; 197 bool audio_enable; 198 199 unsigned int reg_shift; 200 struct regmap *regm; 201 void (*enable_audio)(struct dw_hdmi *hdmi); 202 void (*disable_audio)(struct dw_hdmi *hdmi); 203 204 struct mutex cec_notifier_mutex; 205 struct cec_notifier *cec_notifier; 206 207 hdmi_codec_plugged_cb plugged_cb; 208 struct device *codec_dev; 209 enum drm_connector_status last_connector_result; 210 }; 211 212 #define HDMI_IH_PHY_STAT0_RX_SENSE \ 213 (HDMI_IH_PHY_STAT0_RX_SENSE0 | HDMI_IH_PHY_STAT0_RX_SENSE1 | \ 214 HDMI_IH_PHY_STAT0_RX_SENSE2 | HDMI_IH_PHY_STAT0_RX_SENSE3) 215 216 #define HDMI_PHY_RX_SENSE \ 217 (HDMI_PHY_RX_SENSE0 | HDMI_PHY_RX_SENSE1 | \ 218 HDMI_PHY_RX_SENSE2 | HDMI_PHY_RX_SENSE3) 219 220 static inline void hdmi_writeb(struct dw_hdmi *hdmi, u8 val, int offset) 221 { 222 regmap_write(hdmi->regm, offset << hdmi->reg_shift, val); 223 } 224 225 static inline u8 hdmi_readb(struct dw_hdmi *hdmi, int offset) 226 { 227 unsigned int val = 0; 228 229 regmap_read(hdmi->regm, offset << hdmi->reg_shift, &val); 230 231 return val; 232 } 233 234 static void handle_plugged_change(struct dw_hdmi *hdmi, bool plugged) 235 { 236 if (hdmi->plugged_cb && hdmi->codec_dev) 237 hdmi->plugged_cb(hdmi->codec_dev, plugged); 238 } 239 240 int dw_hdmi_set_plugged_cb(struct dw_hdmi *hdmi, hdmi_codec_plugged_cb fn, 241 struct device *codec_dev) 242 { 243 bool plugged; 244 245 mutex_lock(&hdmi->mutex); 246 hdmi->plugged_cb = fn; 247 hdmi->codec_dev = codec_dev; 248 plugged = hdmi->last_connector_result == connector_status_connected; 249 handle_plugged_change(hdmi, plugged); 250 mutex_unlock(&hdmi->mutex); 251 252 return 0; 253 } 254 EXPORT_SYMBOL_GPL(dw_hdmi_set_plugged_cb); 255 256 static void hdmi_modb(struct dw_hdmi *hdmi, u8 data, u8 mask, unsigned reg) 257 { 258 regmap_update_bits(hdmi->regm, reg << hdmi->reg_shift, mask, data); 259 } 260 261 static void hdmi_mask_writeb(struct dw_hdmi *hdmi, u8 data, unsigned int reg, 262 u8 shift, u8 mask) 263 { 264 hdmi_modb(hdmi, data << shift, mask, reg); 265 } 266 267 static void dw_hdmi_i2c_init(struct dw_hdmi *hdmi) 268 { 269 hdmi_writeb(hdmi, HDMI_PHY_I2CM_INT_ADDR_DONE_POL, 270 HDMI_PHY_I2CM_INT_ADDR); 271 272 hdmi_writeb(hdmi, HDMI_PHY_I2CM_CTLINT_ADDR_NAC_POL | 273 HDMI_PHY_I2CM_CTLINT_ADDR_ARBITRATION_POL, 274 HDMI_PHY_I2CM_CTLINT_ADDR); 275 276 /* Software reset */ 277 hdmi_writeb(hdmi, 0x00, HDMI_I2CM_SOFTRSTZ); 278 279 /* Set Standard Mode speed (determined to be 100KHz on iMX6) */ 280 hdmi_writeb(hdmi, 0x00, HDMI_I2CM_DIV); 281 282 /* Set done, not acknowledged and arbitration interrupt polarities */ 283 hdmi_writeb(hdmi, HDMI_I2CM_INT_DONE_POL, HDMI_I2CM_INT); 284 hdmi_writeb(hdmi, HDMI_I2CM_CTLINT_NAC_POL | HDMI_I2CM_CTLINT_ARB_POL, 285 HDMI_I2CM_CTLINT); 286 287 /* Clear DONE and ERROR interrupts */ 288 hdmi_writeb(hdmi, HDMI_IH_I2CM_STAT0_ERROR | HDMI_IH_I2CM_STAT0_DONE, 289 HDMI_IH_I2CM_STAT0); 290 291 /* Mute DONE and ERROR interrupts */ 292 hdmi_writeb(hdmi, HDMI_IH_I2CM_STAT0_ERROR | HDMI_IH_I2CM_STAT0_DONE, 293 HDMI_IH_MUTE_I2CM_STAT0); 294 } 295 296 static bool dw_hdmi_i2c_unwedge(struct dw_hdmi *hdmi) 297 { 298 /* If no unwedge state then give up */ 299 if (!hdmi->unwedge_state) 300 return false; 301 302 dev_info(hdmi->dev, "Attempting to unwedge stuck i2c bus\n"); 303 304 /* 305 * This is a huge hack to workaround a problem where the dw_hdmi i2c 306 * bus could sometimes get wedged. Once wedged there doesn't appear 307 * to be any way to unwedge it (including the HDMI_I2CM_SOFTRSTZ) 308 * other than pulsing the SDA line. 309 * 310 * We appear to be able to pulse the SDA line (in the eyes of dw_hdmi) 311 * by: 312 * 1. Remux the pin as a GPIO output, driven low. 313 * 2. Wait a little while. 1 ms seems to work, but we'll do 10. 314 * 3. Immediately jump to remux the pin as dw_hdmi i2c again. 315 * 316 * At the moment of remuxing, the line will still be low due to its 317 * recent stint as an output, but then it will be pulled high by the 318 * (presumed) external pullup. dw_hdmi seems to see this as a rising 319 * edge and that seems to get it out of its jam. 320 * 321 * This wedging was only ever seen on one TV, and only on one of 322 * its HDMI ports. It happened when the TV was powered on while the 323 * device was plugged in. A scope trace shows the TV bringing both SDA 324 * and SCL low, then bringing them both back up at roughly the same 325 * time. Presumably this confuses dw_hdmi because it saw activity but 326 * no real STOP (maybe it thinks there's another master on the bus?). 327 * Giving it a clean rising edge of SDA while SCL is already high 328 * presumably makes dw_hdmi see a STOP which seems to bring dw_hdmi out 329 * of its stupor. 330 * 331 * Note that after coming back alive, transfers seem to immediately 332 * resume, so if we unwedge due to a timeout we should wait a little 333 * longer for our transfer to finish, since it might have just started 334 * now. 335 */ 336 pinctrl_select_state(hdmi->pinctrl, hdmi->unwedge_state); 337 msleep(10); 338 pinctrl_select_state(hdmi->pinctrl, hdmi->default_state); 339 340 return true; 341 } 342 343 static int dw_hdmi_i2c_wait(struct dw_hdmi *hdmi) 344 { 345 struct dw_hdmi_i2c *i2c = hdmi->i2c; 346 int stat; 347 348 stat = wait_for_completion_timeout(&i2c->cmp, HZ / 10); 349 if (!stat) { 350 /* If we can't unwedge, return timeout */ 351 if (!dw_hdmi_i2c_unwedge(hdmi)) 352 return -EAGAIN; 353 354 /* We tried to unwedge; give it another chance */ 355 stat = wait_for_completion_timeout(&i2c->cmp, HZ / 10); 356 if (!stat) 357 return -EAGAIN; 358 } 359 360 /* Check for error condition on the bus */ 361 if (i2c->stat & HDMI_IH_I2CM_STAT0_ERROR) 362 return -EIO; 363 364 return 0; 365 } 366 367 static int dw_hdmi_i2c_read(struct dw_hdmi *hdmi, 368 unsigned char *buf, unsigned int length) 369 { 370 struct dw_hdmi_i2c *i2c = hdmi->i2c; 371 int ret; 372 373 if (!i2c->is_regaddr) { 374 dev_dbg(hdmi->dev, "set read register address to 0\n"); 375 i2c->slave_reg = 0x00; 376 i2c->is_regaddr = true; 377 } 378 379 while (length--) { 380 reinit_completion(&i2c->cmp); 381 382 hdmi_writeb(hdmi, i2c->slave_reg++, HDMI_I2CM_ADDRESS); 383 if (i2c->is_segment) 384 hdmi_writeb(hdmi, HDMI_I2CM_OPERATION_READ_EXT, 385 HDMI_I2CM_OPERATION); 386 else 387 hdmi_writeb(hdmi, HDMI_I2CM_OPERATION_READ, 388 HDMI_I2CM_OPERATION); 389 390 ret = dw_hdmi_i2c_wait(hdmi); 391 if (ret) 392 return ret; 393 394 *buf++ = hdmi_readb(hdmi, HDMI_I2CM_DATAI); 395 } 396 i2c->is_segment = false; 397 398 return 0; 399 } 400 401 static int dw_hdmi_i2c_write(struct dw_hdmi *hdmi, 402 unsigned char *buf, unsigned int length) 403 { 404 struct dw_hdmi_i2c *i2c = hdmi->i2c; 405 int ret; 406 407 if (!i2c->is_regaddr) { 408 /* Use the first write byte as register address */ 409 i2c->slave_reg = buf[0]; 410 length--; 411 buf++; 412 i2c->is_regaddr = true; 413 } 414 415 while (length--) { 416 reinit_completion(&i2c->cmp); 417 418 hdmi_writeb(hdmi, *buf++, HDMI_I2CM_DATAO); 419 hdmi_writeb(hdmi, i2c->slave_reg++, HDMI_I2CM_ADDRESS); 420 hdmi_writeb(hdmi, HDMI_I2CM_OPERATION_WRITE, 421 HDMI_I2CM_OPERATION); 422 423 ret = dw_hdmi_i2c_wait(hdmi); 424 if (ret) 425 return ret; 426 } 427 428 return 0; 429 } 430 431 static int dw_hdmi_i2c_xfer(struct i2c_adapter *adap, 432 struct i2c_msg *msgs, int num) 433 { 434 struct dw_hdmi *hdmi = i2c_get_adapdata(adap); 435 struct dw_hdmi_i2c *i2c = hdmi->i2c; 436 u8 addr = msgs[0].addr; 437 int i, ret = 0; 438 439 if (addr == DDC_CI_ADDR) 440 /* 441 * The internal I2C controller does not support the multi-byte 442 * read and write operations needed for DDC/CI. 443 * TOFIX: Blacklist the DDC/CI address until we filter out 444 * unsupported I2C operations. 445 */ 446 return -EOPNOTSUPP; 447 448 dev_dbg(hdmi->dev, "xfer: num: %d, addr: %#x\n", num, addr); 449 450 for (i = 0; i < num; i++) { 451 if (msgs[i].len == 0) { 452 dev_dbg(hdmi->dev, 453 "unsupported transfer %d/%d, no data\n", 454 i + 1, num); 455 return -EOPNOTSUPP; 456 } 457 } 458 459 mutex_lock(&i2c->lock); 460 461 /* Unmute DONE and ERROR interrupts */ 462 hdmi_writeb(hdmi, 0x00, HDMI_IH_MUTE_I2CM_STAT0); 463 464 /* Set slave device address taken from the first I2C message */ 465 hdmi_writeb(hdmi, addr, HDMI_I2CM_SLAVE); 466 467 /* Set slave device register address on transfer */ 468 i2c->is_regaddr = false; 469 470 /* Set segment pointer for I2C extended read mode operation */ 471 i2c->is_segment = false; 472 473 for (i = 0; i < num; i++) { 474 dev_dbg(hdmi->dev, "xfer: num: %d/%d, len: %d, flags: %#x\n", 475 i + 1, num, msgs[i].len, msgs[i].flags); 476 if (msgs[i].addr == DDC_SEGMENT_ADDR && msgs[i].len == 1) { 477 i2c->is_segment = true; 478 hdmi_writeb(hdmi, DDC_SEGMENT_ADDR, HDMI_I2CM_SEGADDR); 479 hdmi_writeb(hdmi, *msgs[i].buf, HDMI_I2CM_SEGPTR); 480 } else { 481 if (msgs[i].flags & I2C_M_RD) 482 ret = dw_hdmi_i2c_read(hdmi, msgs[i].buf, 483 msgs[i].len); 484 else 485 ret = dw_hdmi_i2c_write(hdmi, msgs[i].buf, 486 msgs[i].len); 487 } 488 if (ret < 0) 489 break; 490 } 491 492 if (!ret) 493 ret = num; 494 495 /* Mute DONE and ERROR interrupts */ 496 hdmi_writeb(hdmi, HDMI_IH_I2CM_STAT0_ERROR | HDMI_IH_I2CM_STAT0_DONE, 497 HDMI_IH_MUTE_I2CM_STAT0); 498 499 mutex_unlock(&i2c->lock); 500 501 return ret; 502 } 503 504 static u32 dw_hdmi_i2c_func(struct i2c_adapter *adapter) 505 { 506 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; 507 } 508 509 static const struct i2c_algorithm dw_hdmi_algorithm = { 510 .master_xfer = dw_hdmi_i2c_xfer, 511 .functionality = dw_hdmi_i2c_func, 512 }; 513 514 static struct i2c_adapter *dw_hdmi_i2c_adapter(struct dw_hdmi *hdmi) 515 { 516 struct i2c_adapter *adap; 517 struct dw_hdmi_i2c *i2c; 518 int ret; 519 520 i2c = devm_kzalloc(hdmi->dev, sizeof(*i2c), GFP_KERNEL); 521 if (!i2c) 522 return ERR_PTR(-ENOMEM); 523 524 mutex_init(&i2c->lock); 525 init_completion(&i2c->cmp); 526 527 adap = &i2c->adap; 528 adap->class = I2C_CLASS_DDC; 529 adap->owner = THIS_MODULE; 530 adap->dev.parent = hdmi->dev; 531 adap->algo = &dw_hdmi_algorithm; 532 strlcpy(adap->name, "DesignWare HDMI", sizeof(adap->name)); 533 i2c_set_adapdata(adap, hdmi); 534 535 ret = i2c_add_adapter(adap); 536 if (ret) { 537 dev_warn(hdmi->dev, "cannot add %s I2C adapter\n", adap->name); 538 devm_kfree(hdmi->dev, i2c); 539 return ERR_PTR(ret); 540 } 541 542 hdmi->i2c = i2c; 543 544 dev_info(hdmi->dev, "registered %s I2C bus driver\n", adap->name); 545 546 return adap; 547 } 548 549 static void hdmi_set_cts_n(struct dw_hdmi *hdmi, unsigned int cts, 550 unsigned int n) 551 { 552 /* Must be set/cleared first */ 553 hdmi_modb(hdmi, 0, HDMI_AUD_CTS3_CTS_MANUAL, HDMI_AUD_CTS3); 554 555 /* nshift factor = 0 */ 556 hdmi_modb(hdmi, 0, HDMI_AUD_CTS3_N_SHIFT_MASK, HDMI_AUD_CTS3); 557 558 /* Use automatic CTS generation mode when CTS is not set */ 559 if (cts) 560 hdmi_writeb(hdmi, ((cts >> 16) & 561 HDMI_AUD_CTS3_AUDCTS19_16_MASK) | 562 HDMI_AUD_CTS3_CTS_MANUAL, 563 HDMI_AUD_CTS3); 564 else 565 hdmi_writeb(hdmi, 0, HDMI_AUD_CTS3); 566 hdmi_writeb(hdmi, (cts >> 8) & 0xff, HDMI_AUD_CTS2); 567 hdmi_writeb(hdmi, cts & 0xff, HDMI_AUD_CTS1); 568 569 hdmi_writeb(hdmi, (n >> 16) & 0x0f, HDMI_AUD_N3); 570 hdmi_writeb(hdmi, (n >> 8) & 0xff, HDMI_AUD_N2); 571 hdmi_writeb(hdmi, n & 0xff, HDMI_AUD_N1); 572 } 573 574 static unsigned int hdmi_compute_n(unsigned int freq, unsigned long pixel_clk) 575 { 576 unsigned int n = (128 * freq) / 1000; 577 unsigned int mult = 1; 578 579 while (freq > 48000) { 580 mult *= 2; 581 freq /= 2; 582 } 583 584 switch (freq) { 585 case 32000: 586 if (pixel_clk == 25175000) 587 n = 4576; 588 else if (pixel_clk == 27027000) 589 n = 4096; 590 else if (pixel_clk == 74176000 || pixel_clk == 148352000) 591 n = 11648; 592 else 593 n = 4096; 594 n *= mult; 595 break; 596 597 case 44100: 598 if (pixel_clk == 25175000) 599 n = 7007; 600 else if (pixel_clk == 74176000) 601 n = 17836; 602 else if (pixel_clk == 148352000) 603 n = 8918; 604 else 605 n = 6272; 606 n *= mult; 607 break; 608 609 case 48000: 610 if (pixel_clk == 25175000) 611 n = 6864; 612 else if (pixel_clk == 27027000) 613 n = 6144; 614 else if (pixel_clk == 74176000) 615 n = 11648; 616 else if (pixel_clk == 148352000) 617 n = 5824; 618 else 619 n = 6144; 620 n *= mult; 621 break; 622 623 default: 624 break; 625 } 626 627 return n; 628 } 629 630 /* 631 * When transmitting IEC60958 linear PCM audio, these registers allow to 632 * configure the channel status information of all the channel status 633 * bits in the IEC60958 frame. For the moment this configuration is only 634 * used when the I2S audio interface, General Purpose Audio (GPA), 635 * or AHB audio DMA (AHBAUDDMA) interface is active 636 * (for S/PDIF interface this information comes from the stream). 637 */ 638 void dw_hdmi_set_channel_status(struct dw_hdmi *hdmi, 639 u8 *channel_status) 640 { 641 /* 642 * Set channel status register for frequency and word length. 643 * Use default values for other registers. 644 */ 645 hdmi_writeb(hdmi, channel_status[3], HDMI_FC_AUDSCHNLS7); 646 hdmi_writeb(hdmi, channel_status[4], HDMI_FC_AUDSCHNLS8); 647 } 648 EXPORT_SYMBOL_GPL(dw_hdmi_set_channel_status); 649 650 static void hdmi_set_clk_regenerator(struct dw_hdmi *hdmi, 651 unsigned long pixel_clk, unsigned int sample_rate) 652 { 653 unsigned long ftdms = pixel_clk; 654 unsigned int n, cts; 655 u8 config3; 656 u64 tmp; 657 658 n = hdmi_compute_n(sample_rate, pixel_clk); 659 660 config3 = hdmi_readb(hdmi, HDMI_CONFIG3_ID); 661 662 /* Only compute CTS when using internal AHB audio */ 663 if (config3 & HDMI_CONFIG3_AHBAUDDMA) { 664 /* 665 * Compute the CTS value from the N value. Note that CTS and N 666 * can be up to 20 bits in total, so we need 64-bit math. Also 667 * note that our TDMS clock is not fully accurate; it is 668 * accurate to kHz. This can introduce an unnecessary remainder 669 * in the calculation below, so we don't try to warn about that. 670 */ 671 tmp = (u64)ftdms * n; 672 do_div(tmp, 128 * sample_rate); 673 cts = tmp; 674 675 dev_dbg(hdmi->dev, "%s: fs=%uHz ftdms=%lu.%03luMHz N=%d cts=%d\n", 676 __func__, sample_rate, 677 ftdms / 1000000, (ftdms / 1000) % 1000, 678 n, cts); 679 } else { 680 cts = 0; 681 } 682 683 spin_lock_irq(&hdmi->audio_lock); 684 hdmi->audio_n = n; 685 hdmi->audio_cts = cts; 686 hdmi_set_cts_n(hdmi, cts, hdmi->audio_enable ? n : 0); 687 spin_unlock_irq(&hdmi->audio_lock); 688 } 689 690 static void hdmi_init_clk_regenerator(struct dw_hdmi *hdmi) 691 { 692 mutex_lock(&hdmi->audio_mutex); 693 hdmi_set_clk_regenerator(hdmi, 74250000, hdmi->sample_rate); 694 mutex_unlock(&hdmi->audio_mutex); 695 } 696 697 static void hdmi_clk_regenerator_update_pixel_clock(struct dw_hdmi *hdmi) 698 { 699 mutex_lock(&hdmi->audio_mutex); 700 hdmi_set_clk_regenerator(hdmi, hdmi->hdmi_data.video_mode.mtmdsclock, 701 hdmi->sample_rate); 702 mutex_unlock(&hdmi->audio_mutex); 703 } 704 705 void dw_hdmi_set_sample_rate(struct dw_hdmi *hdmi, unsigned int rate) 706 { 707 mutex_lock(&hdmi->audio_mutex); 708 hdmi->sample_rate = rate; 709 hdmi_set_clk_regenerator(hdmi, hdmi->hdmi_data.video_mode.mtmdsclock, 710 hdmi->sample_rate); 711 mutex_unlock(&hdmi->audio_mutex); 712 } 713 EXPORT_SYMBOL_GPL(dw_hdmi_set_sample_rate); 714 715 void dw_hdmi_set_channel_count(struct dw_hdmi *hdmi, unsigned int cnt) 716 { 717 u8 layout; 718 719 mutex_lock(&hdmi->audio_mutex); 720 721 /* 722 * For >2 channel PCM audio, we need to select layout 1 723 * and set an appropriate channel map. 724 */ 725 if (cnt > 2) 726 layout = HDMI_FC_AUDSCONF_AUD_PACKET_LAYOUT_LAYOUT1; 727 else 728 layout = HDMI_FC_AUDSCONF_AUD_PACKET_LAYOUT_LAYOUT0; 729 730 hdmi_modb(hdmi, layout, HDMI_FC_AUDSCONF_AUD_PACKET_LAYOUT_MASK, 731 HDMI_FC_AUDSCONF); 732 733 /* Set the audio infoframes channel count */ 734 hdmi_modb(hdmi, (cnt - 1) << HDMI_FC_AUDICONF0_CC_OFFSET, 735 HDMI_FC_AUDICONF0_CC_MASK, HDMI_FC_AUDICONF0); 736 737 mutex_unlock(&hdmi->audio_mutex); 738 } 739 EXPORT_SYMBOL_GPL(dw_hdmi_set_channel_count); 740 741 void dw_hdmi_set_channel_allocation(struct dw_hdmi *hdmi, unsigned int ca) 742 { 743 mutex_lock(&hdmi->audio_mutex); 744 745 hdmi_writeb(hdmi, ca, HDMI_FC_AUDICONF2); 746 747 mutex_unlock(&hdmi->audio_mutex); 748 } 749 EXPORT_SYMBOL_GPL(dw_hdmi_set_channel_allocation); 750 751 static void hdmi_enable_audio_clk(struct dw_hdmi *hdmi, bool enable) 752 { 753 if (enable) 754 hdmi->mc_clkdis &= ~HDMI_MC_CLKDIS_AUDCLK_DISABLE; 755 else 756 hdmi->mc_clkdis |= HDMI_MC_CLKDIS_AUDCLK_DISABLE; 757 hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS); 758 } 759 760 static u8 *hdmi_audio_get_eld(struct dw_hdmi *hdmi) 761 { 762 if (!hdmi->curr_conn) 763 return NULL; 764 765 return hdmi->curr_conn->eld; 766 } 767 768 static void dw_hdmi_ahb_audio_enable(struct dw_hdmi *hdmi) 769 { 770 hdmi_set_cts_n(hdmi, hdmi->audio_cts, hdmi->audio_n); 771 } 772 773 static void dw_hdmi_ahb_audio_disable(struct dw_hdmi *hdmi) 774 { 775 hdmi_set_cts_n(hdmi, hdmi->audio_cts, 0); 776 } 777 778 static void dw_hdmi_i2s_audio_enable(struct dw_hdmi *hdmi) 779 { 780 hdmi_set_cts_n(hdmi, hdmi->audio_cts, hdmi->audio_n); 781 hdmi_enable_audio_clk(hdmi, true); 782 } 783 784 static void dw_hdmi_i2s_audio_disable(struct dw_hdmi *hdmi) 785 { 786 hdmi_enable_audio_clk(hdmi, false); 787 } 788 789 void dw_hdmi_audio_enable(struct dw_hdmi *hdmi) 790 { 791 unsigned long flags; 792 793 spin_lock_irqsave(&hdmi->audio_lock, flags); 794 hdmi->audio_enable = true; 795 if (hdmi->enable_audio) 796 hdmi->enable_audio(hdmi); 797 spin_unlock_irqrestore(&hdmi->audio_lock, flags); 798 } 799 EXPORT_SYMBOL_GPL(dw_hdmi_audio_enable); 800 801 void dw_hdmi_audio_disable(struct dw_hdmi *hdmi) 802 { 803 unsigned long flags; 804 805 spin_lock_irqsave(&hdmi->audio_lock, flags); 806 hdmi->audio_enable = false; 807 if (hdmi->disable_audio) 808 hdmi->disable_audio(hdmi); 809 spin_unlock_irqrestore(&hdmi->audio_lock, flags); 810 } 811 EXPORT_SYMBOL_GPL(dw_hdmi_audio_disable); 812 813 static bool hdmi_bus_fmt_is_rgb(unsigned int bus_format) 814 { 815 switch (bus_format) { 816 case MEDIA_BUS_FMT_RGB888_1X24: 817 case MEDIA_BUS_FMT_RGB101010_1X30: 818 case MEDIA_BUS_FMT_RGB121212_1X36: 819 case MEDIA_BUS_FMT_RGB161616_1X48: 820 return true; 821 822 default: 823 return false; 824 } 825 } 826 827 static bool hdmi_bus_fmt_is_yuv444(unsigned int bus_format) 828 { 829 switch (bus_format) { 830 case MEDIA_BUS_FMT_YUV8_1X24: 831 case MEDIA_BUS_FMT_YUV10_1X30: 832 case MEDIA_BUS_FMT_YUV12_1X36: 833 case MEDIA_BUS_FMT_YUV16_1X48: 834 return true; 835 836 default: 837 return false; 838 } 839 } 840 841 static bool hdmi_bus_fmt_is_yuv422(unsigned int bus_format) 842 { 843 switch (bus_format) { 844 case MEDIA_BUS_FMT_UYVY8_1X16: 845 case MEDIA_BUS_FMT_UYVY10_1X20: 846 case MEDIA_BUS_FMT_UYVY12_1X24: 847 return true; 848 849 default: 850 return false; 851 } 852 } 853 854 static bool hdmi_bus_fmt_is_yuv420(unsigned int bus_format) 855 { 856 switch (bus_format) { 857 case MEDIA_BUS_FMT_UYYVYY8_0_5X24: 858 case MEDIA_BUS_FMT_UYYVYY10_0_5X30: 859 case MEDIA_BUS_FMT_UYYVYY12_0_5X36: 860 case MEDIA_BUS_FMT_UYYVYY16_0_5X48: 861 return true; 862 863 default: 864 return false; 865 } 866 } 867 868 static int hdmi_bus_fmt_color_depth(unsigned int bus_format) 869 { 870 switch (bus_format) { 871 case MEDIA_BUS_FMT_RGB888_1X24: 872 case MEDIA_BUS_FMT_YUV8_1X24: 873 case MEDIA_BUS_FMT_UYVY8_1X16: 874 case MEDIA_BUS_FMT_UYYVYY8_0_5X24: 875 return 8; 876 877 case MEDIA_BUS_FMT_RGB101010_1X30: 878 case MEDIA_BUS_FMT_YUV10_1X30: 879 case MEDIA_BUS_FMT_UYVY10_1X20: 880 case MEDIA_BUS_FMT_UYYVYY10_0_5X30: 881 return 10; 882 883 case MEDIA_BUS_FMT_RGB121212_1X36: 884 case MEDIA_BUS_FMT_YUV12_1X36: 885 case MEDIA_BUS_FMT_UYVY12_1X24: 886 case MEDIA_BUS_FMT_UYYVYY12_0_5X36: 887 return 12; 888 889 case MEDIA_BUS_FMT_RGB161616_1X48: 890 case MEDIA_BUS_FMT_YUV16_1X48: 891 case MEDIA_BUS_FMT_UYYVYY16_0_5X48: 892 return 16; 893 894 default: 895 return 0; 896 } 897 } 898 899 /* 900 * this submodule is responsible for the video data synchronization. 901 * for example, for RGB 4:4:4 input, the data map is defined as 902 * pin{47~40} <==> R[7:0] 903 * pin{31~24} <==> G[7:0] 904 * pin{15~8} <==> B[7:0] 905 */ 906 static void hdmi_video_sample(struct dw_hdmi *hdmi) 907 { 908 int color_format = 0; 909 u8 val; 910 911 switch (hdmi->hdmi_data.enc_in_bus_format) { 912 case MEDIA_BUS_FMT_RGB888_1X24: 913 color_format = 0x01; 914 break; 915 case MEDIA_BUS_FMT_RGB101010_1X30: 916 color_format = 0x03; 917 break; 918 case MEDIA_BUS_FMT_RGB121212_1X36: 919 color_format = 0x05; 920 break; 921 case MEDIA_BUS_FMT_RGB161616_1X48: 922 color_format = 0x07; 923 break; 924 925 case MEDIA_BUS_FMT_YUV8_1X24: 926 case MEDIA_BUS_FMT_UYYVYY8_0_5X24: 927 color_format = 0x09; 928 break; 929 case MEDIA_BUS_FMT_YUV10_1X30: 930 case MEDIA_BUS_FMT_UYYVYY10_0_5X30: 931 color_format = 0x0B; 932 break; 933 case MEDIA_BUS_FMT_YUV12_1X36: 934 case MEDIA_BUS_FMT_UYYVYY12_0_5X36: 935 color_format = 0x0D; 936 break; 937 case MEDIA_BUS_FMT_YUV16_1X48: 938 case MEDIA_BUS_FMT_UYYVYY16_0_5X48: 939 color_format = 0x0F; 940 break; 941 942 case MEDIA_BUS_FMT_UYVY8_1X16: 943 color_format = 0x16; 944 break; 945 case MEDIA_BUS_FMT_UYVY10_1X20: 946 color_format = 0x14; 947 break; 948 case MEDIA_BUS_FMT_UYVY12_1X24: 949 color_format = 0x12; 950 break; 951 952 default: 953 return; 954 } 955 956 val = HDMI_TX_INVID0_INTERNAL_DE_GENERATOR_DISABLE | 957 ((color_format << HDMI_TX_INVID0_VIDEO_MAPPING_OFFSET) & 958 HDMI_TX_INVID0_VIDEO_MAPPING_MASK); 959 hdmi_writeb(hdmi, val, HDMI_TX_INVID0); 960 961 /* Enable TX stuffing: When DE is inactive, fix the output data to 0 */ 962 val = HDMI_TX_INSTUFFING_BDBDATA_STUFFING_ENABLE | 963 HDMI_TX_INSTUFFING_RCRDATA_STUFFING_ENABLE | 964 HDMI_TX_INSTUFFING_GYDATA_STUFFING_ENABLE; 965 hdmi_writeb(hdmi, val, HDMI_TX_INSTUFFING); 966 hdmi_writeb(hdmi, 0x0, HDMI_TX_GYDATA0); 967 hdmi_writeb(hdmi, 0x0, HDMI_TX_GYDATA1); 968 hdmi_writeb(hdmi, 0x0, HDMI_TX_RCRDATA0); 969 hdmi_writeb(hdmi, 0x0, HDMI_TX_RCRDATA1); 970 hdmi_writeb(hdmi, 0x0, HDMI_TX_BCBDATA0); 971 hdmi_writeb(hdmi, 0x0, HDMI_TX_BCBDATA1); 972 } 973 974 static int is_color_space_conversion(struct dw_hdmi *hdmi) 975 { 976 struct hdmi_data_info *hdmi_data = &hdmi->hdmi_data; 977 bool is_input_rgb, is_output_rgb; 978 979 is_input_rgb = hdmi_bus_fmt_is_rgb(hdmi_data->enc_in_bus_format); 980 is_output_rgb = hdmi_bus_fmt_is_rgb(hdmi_data->enc_out_bus_format); 981 982 return (is_input_rgb != is_output_rgb) || 983 (is_input_rgb && is_output_rgb && hdmi_data->rgb_limited_range); 984 } 985 986 static int is_color_space_decimation(struct dw_hdmi *hdmi) 987 { 988 if (!hdmi_bus_fmt_is_yuv422(hdmi->hdmi_data.enc_out_bus_format)) 989 return 0; 990 991 if (hdmi_bus_fmt_is_rgb(hdmi->hdmi_data.enc_in_bus_format) || 992 hdmi_bus_fmt_is_yuv444(hdmi->hdmi_data.enc_in_bus_format)) 993 return 1; 994 995 return 0; 996 } 997 998 static int is_color_space_interpolation(struct dw_hdmi *hdmi) 999 { 1000 if (!hdmi_bus_fmt_is_yuv422(hdmi->hdmi_data.enc_in_bus_format)) 1001 return 0; 1002 1003 if (hdmi_bus_fmt_is_rgb(hdmi->hdmi_data.enc_out_bus_format) || 1004 hdmi_bus_fmt_is_yuv444(hdmi->hdmi_data.enc_out_bus_format)) 1005 return 1; 1006 1007 return 0; 1008 } 1009 1010 static bool is_csc_needed(struct dw_hdmi *hdmi) 1011 { 1012 return is_color_space_conversion(hdmi) || 1013 is_color_space_decimation(hdmi) || 1014 is_color_space_interpolation(hdmi); 1015 } 1016 1017 static void dw_hdmi_update_csc_coeffs(struct dw_hdmi *hdmi) 1018 { 1019 const u16 (*csc_coeff)[3][4] = &csc_coeff_default; 1020 bool is_input_rgb, is_output_rgb; 1021 unsigned i; 1022 u32 csc_scale = 1; 1023 1024 is_input_rgb = hdmi_bus_fmt_is_rgb(hdmi->hdmi_data.enc_in_bus_format); 1025 is_output_rgb = hdmi_bus_fmt_is_rgb(hdmi->hdmi_data.enc_out_bus_format); 1026 1027 if (!is_input_rgb && is_output_rgb) { 1028 if (hdmi->hdmi_data.enc_out_encoding == V4L2_YCBCR_ENC_601) 1029 csc_coeff = &csc_coeff_rgb_out_eitu601; 1030 else 1031 csc_coeff = &csc_coeff_rgb_out_eitu709; 1032 } else if (is_input_rgb && !is_output_rgb) { 1033 if (hdmi->hdmi_data.enc_out_encoding == V4L2_YCBCR_ENC_601) 1034 csc_coeff = &csc_coeff_rgb_in_eitu601; 1035 else 1036 csc_coeff = &csc_coeff_rgb_in_eitu709; 1037 csc_scale = 0; 1038 } else if (is_input_rgb && is_output_rgb && 1039 hdmi->hdmi_data.rgb_limited_range) { 1040 csc_coeff = &csc_coeff_rgb_full_to_rgb_limited; 1041 } 1042 1043 /* The CSC registers are sequential, alternating MSB then LSB */ 1044 for (i = 0; i < ARRAY_SIZE(csc_coeff_default[0]); i++) { 1045 u16 coeff_a = (*csc_coeff)[0][i]; 1046 u16 coeff_b = (*csc_coeff)[1][i]; 1047 u16 coeff_c = (*csc_coeff)[2][i]; 1048 1049 hdmi_writeb(hdmi, coeff_a & 0xff, HDMI_CSC_COEF_A1_LSB + i * 2); 1050 hdmi_writeb(hdmi, coeff_a >> 8, HDMI_CSC_COEF_A1_MSB + i * 2); 1051 hdmi_writeb(hdmi, coeff_b & 0xff, HDMI_CSC_COEF_B1_LSB + i * 2); 1052 hdmi_writeb(hdmi, coeff_b >> 8, HDMI_CSC_COEF_B1_MSB + i * 2); 1053 hdmi_writeb(hdmi, coeff_c & 0xff, HDMI_CSC_COEF_C1_LSB + i * 2); 1054 hdmi_writeb(hdmi, coeff_c >> 8, HDMI_CSC_COEF_C1_MSB + i * 2); 1055 } 1056 1057 hdmi_modb(hdmi, csc_scale, HDMI_CSC_SCALE_CSCSCALE_MASK, 1058 HDMI_CSC_SCALE); 1059 } 1060 1061 static void hdmi_video_csc(struct dw_hdmi *hdmi) 1062 { 1063 int color_depth = 0; 1064 int interpolation = HDMI_CSC_CFG_INTMODE_DISABLE; 1065 int decimation = 0; 1066 1067 /* YCC422 interpolation to 444 mode */ 1068 if (is_color_space_interpolation(hdmi)) 1069 interpolation = HDMI_CSC_CFG_INTMODE_CHROMA_INT_FORMULA1; 1070 else if (is_color_space_decimation(hdmi)) 1071 decimation = HDMI_CSC_CFG_DECMODE_CHROMA_INT_FORMULA3; 1072 1073 switch (hdmi_bus_fmt_color_depth(hdmi->hdmi_data.enc_out_bus_format)) { 1074 case 8: 1075 color_depth = HDMI_CSC_SCALE_CSC_COLORDE_PTH_24BPP; 1076 break; 1077 case 10: 1078 color_depth = HDMI_CSC_SCALE_CSC_COLORDE_PTH_30BPP; 1079 break; 1080 case 12: 1081 color_depth = HDMI_CSC_SCALE_CSC_COLORDE_PTH_36BPP; 1082 break; 1083 case 16: 1084 color_depth = HDMI_CSC_SCALE_CSC_COLORDE_PTH_48BPP; 1085 break; 1086 1087 default: 1088 return; 1089 } 1090 1091 /* Configure the CSC registers */ 1092 hdmi_writeb(hdmi, interpolation | decimation, HDMI_CSC_CFG); 1093 hdmi_modb(hdmi, color_depth, HDMI_CSC_SCALE_CSC_COLORDE_PTH_MASK, 1094 HDMI_CSC_SCALE); 1095 1096 dw_hdmi_update_csc_coeffs(hdmi); 1097 } 1098 1099 /* 1100 * HDMI video packetizer is used to packetize the data. 1101 * for example, if input is YCC422 mode or repeater is used, 1102 * data should be repacked this module can be bypassed. 1103 */ 1104 static void hdmi_video_packetize(struct dw_hdmi *hdmi) 1105 { 1106 unsigned int color_depth = 0; 1107 unsigned int remap_size = HDMI_VP_REMAP_YCC422_16bit; 1108 unsigned int output_select = HDMI_VP_CONF_OUTPUT_SELECTOR_PP; 1109 struct hdmi_data_info *hdmi_data = &hdmi->hdmi_data; 1110 u8 val, vp_conf; 1111 1112 if (hdmi_bus_fmt_is_rgb(hdmi->hdmi_data.enc_out_bus_format) || 1113 hdmi_bus_fmt_is_yuv444(hdmi->hdmi_data.enc_out_bus_format) || 1114 hdmi_bus_fmt_is_yuv420(hdmi->hdmi_data.enc_out_bus_format)) { 1115 switch (hdmi_bus_fmt_color_depth( 1116 hdmi->hdmi_data.enc_out_bus_format)) { 1117 case 8: 1118 color_depth = 4; 1119 output_select = HDMI_VP_CONF_OUTPUT_SELECTOR_BYPASS; 1120 break; 1121 case 10: 1122 color_depth = 5; 1123 break; 1124 case 12: 1125 color_depth = 6; 1126 break; 1127 case 16: 1128 color_depth = 7; 1129 break; 1130 default: 1131 output_select = HDMI_VP_CONF_OUTPUT_SELECTOR_BYPASS; 1132 } 1133 } else if (hdmi_bus_fmt_is_yuv422(hdmi->hdmi_data.enc_out_bus_format)) { 1134 switch (hdmi_bus_fmt_color_depth( 1135 hdmi->hdmi_data.enc_out_bus_format)) { 1136 case 0: 1137 case 8: 1138 remap_size = HDMI_VP_REMAP_YCC422_16bit; 1139 break; 1140 case 10: 1141 remap_size = HDMI_VP_REMAP_YCC422_20bit; 1142 break; 1143 case 12: 1144 remap_size = HDMI_VP_REMAP_YCC422_24bit; 1145 break; 1146 1147 default: 1148 return; 1149 } 1150 output_select = HDMI_VP_CONF_OUTPUT_SELECTOR_YCC422; 1151 } else { 1152 return; 1153 } 1154 1155 /* set the packetizer registers */ 1156 val = ((color_depth << HDMI_VP_PR_CD_COLOR_DEPTH_OFFSET) & 1157 HDMI_VP_PR_CD_COLOR_DEPTH_MASK) | 1158 ((hdmi_data->pix_repet_factor << 1159 HDMI_VP_PR_CD_DESIRED_PR_FACTOR_OFFSET) & 1160 HDMI_VP_PR_CD_DESIRED_PR_FACTOR_MASK); 1161 hdmi_writeb(hdmi, val, HDMI_VP_PR_CD); 1162 1163 hdmi_modb(hdmi, HDMI_VP_STUFF_PR_STUFFING_STUFFING_MODE, 1164 HDMI_VP_STUFF_PR_STUFFING_MASK, HDMI_VP_STUFF); 1165 1166 /* Data from pixel repeater block */ 1167 if (hdmi_data->pix_repet_factor > 1) { 1168 vp_conf = HDMI_VP_CONF_PR_EN_ENABLE | 1169 HDMI_VP_CONF_BYPASS_SELECT_PIX_REPEATER; 1170 } else { /* data from packetizer block */ 1171 vp_conf = HDMI_VP_CONF_PR_EN_DISABLE | 1172 HDMI_VP_CONF_BYPASS_SELECT_VID_PACKETIZER; 1173 } 1174 1175 hdmi_modb(hdmi, vp_conf, 1176 HDMI_VP_CONF_PR_EN_MASK | 1177 HDMI_VP_CONF_BYPASS_SELECT_MASK, HDMI_VP_CONF); 1178 1179 hdmi_modb(hdmi, 1 << HDMI_VP_STUFF_IDEFAULT_PHASE_OFFSET, 1180 HDMI_VP_STUFF_IDEFAULT_PHASE_MASK, HDMI_VP_STUFF); 1181 1182 hdmi_writeb(hdmi, remap_size, HDMI_VP_REMAP); 1183 1184 if (output_select == HDMI_VP_CONF_OUTPUT_SELECTOR_PP) { 1185 vp_conf = HDMI_VP_CONF_BYPASS_EN_DISABLE | 1186 HDMI_VP_CONF_PP_EN_ENABLE | 1187 HDMI_VP_CONF_YCC422_EN_DISABLE; 1188 } else if (output_select == HDMI_VP_CONF_OUTPUT_SELECTOR_YCC422) { 1189 vp_conf = HDMI_VP_CONF_BYPASS_EN_DISABLE | 1190 HDMI_VP_CONF_PP_EN_DISABLE | 1191 HDMI_VP_CONF_YCC422_EN_ENABLE; 1192 } else if (output_select == HDMI_VP_CONF_OUTPUT_SELECTOR_BYPASS) { 1193 vp_conf = HDMI_VP_CONF_BYPASS_EN_ENABLE | 1194 HDMI_VP_CONF_PP_EN_DISABLE | 1195 HDMI_VP_CONF_YCC422_EN_DISABLE; 1196 } else { 1197 return; 1198 } 1199 1200 hdmi_modb(hdmi, vp_conf, 1201 HDMI_VP_CONF_BYPASS_EN_MASK | HDMI_VP_CONF_PP_EN_ENMASK | 1202 HDMI_VP_CONF_YCC422_EN_MASK, HDMI_VP_CONF); 1203 1204 hdmi_modb(hdmi, HDMI_VP_STUFF_PP_STUFFING_STUFFING_MODE | 1205 HDMI_VP_STUFF_YCC422_STUFFING_STUFFING_MODE, 1206 HDMI_VP_STUFF_PP_STUFFING_MASK | 1207 HDMI_VP_STUFF_YCC422_STUFFING_MASK, HDMI_VP_STUFF); 1208 1209 hdmi_modb(hdmi, output_select, HDMI_VP_CONF_OUTPUT_SELECTOR_MASK, 1210 HDMI_VP_CONF); 1211 } 1212 1213 /* ----------------------------------------------------------------------------- 1214 * Synopsys PHY Handling 1215 */ 1216 1217 static inline void hdmi_phy_test_clear(struct dw_hdmi *hdmi, 1218 unsigned char bit) 1219 { 1220 hdmi_modb(hdmi, bit << HDMI_PHY_TST0_TSTCLR_OFFSET, 1221 HDMI_PHY_TST0_TSTCLR_MASK, HDMI_PHY_TST0); 1222 } 1223 1224 static bool hdmi_phy_wait_i2c_done(struct dw_hdmi *hdmi, int msec) 1225 { 1226 u32 val; 1227 1228 while ((val = hdmi_readb(hdmi, HDMI_IH_I2CMPHY_STAT0) & 0x3) == 0) { 1229 if (msec-- == 0) 1230 return false; 1231 udelay(1000); 1232 } 1233 hdmi_writeb(hdmi, val, HDMI_IH_I2CMPHY_STAT0); 1234 1235 return true; 1236 } 1237 1238 void dw_hdmi_phy_i2c_write(struct dw_hdmi *hdmi, unsigned short data, 1239 unsigned char addr) 1240 { 1241 hdmi_writeb(hdmi, 0xFF, HDMI_IH_I2CMPHY_STAT0); 1242 hdmi_writeb(hdmi, addr, HDMI_PHY_I2CM_ADDRESS_ADDR); 1243 hdmi_writeb(hdmi, (unsigned char)(data >> 8), 1244 HDMI_PHY_I2CM_DATAO_1_ADDR); 1245 hdmi_writeb(hdmi, (unsigned char)(data >> 0), 1246 HDMI_PHY_I2CM_DATAO_0_ADDR); 1247 hdmi_writeb(hdmi, HDMI_PHY_I2CM_OPERATION_ADDR_WRITE, 1248 HDMI_PHY_I2CM_OPERATION_ADDR); 1249 hdmi_phy_wait_i2c_done(hdmi, 1000); 1250 } 1251 EXPORT_SYMBOL_GPL(dw_hdmi_phy_i2c_write); 1252 1253 /* Filter out invalid setups to avoid configuring SCDC and scrambling */ 1254 static bool dw_hdmi_support_scdc(struct dw_hdmi *hdmi, 1255 const struct drm_display_info *display) 1256 { 1257 /* Completely disable SCDC support for older controllers */ 1258 if (hdmi->version < 0x200a) 1259 return false; 1260 1261 /* Disable if no DDC bus */ 1262 if (!hdmi->ddc) 1263 return false; 1264 1265 /* Disable if SCDC is not supported, or if an HF-VSDB block is absent */ 1266 if (!display->hdmi.scdc.supported || 1267 !display->hdmi.scdc.scrambling.supported) 1268 return false; 1269 1270 /* 1271 * Disable if display only support low TMDS rates and scrambling 1272 * for low rates is not supported either 1273 */ 1274 if (!display->hdmi.scdc.scrambling.low_rates && 1275 display->max_tmds_clock <= 340000) 1276 return false; 1277 1278 return true; 1279 } 1280 1281 /* 1282 * HDMI2.0 Specifies the following procedure for High TMDS Bit Rates: 1283 * - The Source shall suspend transmission of the TMDS clock and data 1284 * - The Source shall write to the TMDS_Bit_Clock_Ratio bit to change it 1285 * from a 0 to a 1 or from a 1 to a 0 1286 * - The Source shall allow a minimum of 1 ms and a maximum of 100 ms from 1287 * the time the TMDS_Bit_Clock_Ratio bit is written until resuming 1288 * transmission of TMDS clock and data 1289 * 1290 * To respect the 100ms maximum delay, the dw_hdmi_set_high_tmds_clock_ratio() 1291 * helper should called right before enabling the TMDS Clock and Data in 1292 * the PHY configuration callback. 1293 */ 1294 void dw_hdmi_set_high_tmds_clock_ratio(struct dw_hdmi *hdmi, 1295 const struct drm_display_info *display) 1296 { 1297 unsigned long mtmdsclock = hdmi->hdmi_data.video_mode.mtmdsclock; 1298 1299 /* Control for TMDS Bit Period/TMDS Clock-Period Ratio */ 1300 if (dw_hdmi_support_scdc(hdmi, display)) { 1301 if (mtmdsclock > HDMI14_MAX_TMDSCLK) 1302 drm_scdc_set_high_tmds_clock_ratio(hdmi->ddc, 1); 1303 else 1304 drm_scdc_set_high_tmds_clock_ratio(hdmi->ddc, 0); 1305 } 1306 } 1307 EXPORT_SYMBOL_GPL(dw_hdmi_set_high_tmds_clock_ratio); 1308 1309 static void dw_hdmi_phy_enable_powerdown(struct dw_hdmi *hdmi, bool enable) 1310 { 1311 hdmi_mask_writeb(hdmi, !enable, HDMI_PHY_CONF0, 1312 HDMI_PHY_CONF0_PDZ_OFFSET, 1313 HDMI_PHY_CONF0_PDZ_MASK); 1314 } 1315 1316 static void dw_hdmi_phy_enable_tmds(struct dw_hdmi *hdmi, u8 enable) 1317 { 1318 hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0, 1319 HDMI_PHY_CONF0_ENTMDS_OFFSET, 1320 HDMI_PHY_CONF0_ENTMDS_MASK); 1321 } 1322 1323 static void dw_hdmi_phy_enable_svsret(struct dw_hdmi *hdmi, u8 enable) 1324 { 1325 hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0, 1326 HDMI_PHY_CONF0_SVSRET_OFFSET, 1327 HDMI_PHY_CONF0_SVSRET_MASK); 1328 } 1329 1330 void dw_hdmi_phy_gen2_pddq(struct dw_hdmi *hdmi, u8 enable) 1331 { 1332 hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0, 1333 HDMI_PHY_CONF0_GEN2_PDDQ_OFFSET, 1334 HDMI_PHY_CONF0_GEN2_PDDQ_MASK); 1335 } 1336 EXPORT_SYMBOL_GPL(dw_hdmi_phy_gen2_pddq); 1337 1338 void dw_hdmi_phy_gen2_txpwron(struct dw_hdmi *hdmi, u8 enable) 1339 { 1340 hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0, 1341 HDMI_PHY_CONF0_GEN2_TXPWRON_OFFSET, 1342 HDMI_PHY_CONF0_GEN2_TXPWRON_MASK); 1343 } 1344 EXPORT_SYMBOL_GPL(dw_hdmi_phy_gen2_txpwron); 1345 1346 static void dw_hdmi_phy_sel_data_en_pol(struct dw_hdmi *hdmi, u8 enable) 1347 { 1348 hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0, 1349 HDMI_PHY_CONF0_SELDATAENPOL_OFFSET, 1350 HDMI_PHY_CONF0_SELDATAENPOL_MASK); 1351 } 1352 1353 static void dw_hdmi_phy_sel_interface_control(struct dw_hdmi *hdmi, u8 enable) 1354 { 1355 hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0, 1356 HDMI_PHY_CONF0_SELDIPIF_OFFSET, 1357 HDMI_PHY_CONF0_SELDIPIF_MASK); 1358 } 1359 1360 void dw_hdmi_phy_reset(struct dw_hdmi *hdmi) 1361 { 1362 /* PHY reset. The reset signal is active high on Gen2 PHYs. */ 1363 hdmi_writeb(hdmi, HDMI_MC_PHYRSTZ_PHYRSTZ, HDMI_MC_PHYRSTZ); 1364 hdmi_writeb(hdmi, 0, HDMI_MC_PHYRSTZ); 1365 } 1366 EXPORT_SYMBOL_GPL(dw_hdmi_phy_reset); 1367 1368 void dw_hdmi_phy_i2c_set_addr(struct dw_hdmi *hdmi, u8 address) 1369 { 1370 hdmi_phy_test_clear(hdmi, 1); 1371 hdmi_writeb(hdmi, address, HDMI_PHY_I2CM_SLAVE_ADDR); 1372 hdmi_phy_test_clear(hdmi, 0); 1373 } 1374 EXPORT_SYMBOL_GPL(dw_hdmi_phy_i2c_set_addr); 1375 1376 static void dw_hdmi_phy_power_off(struct dw_hdmi *hdmi) 1377 { 1378 const struct dw_hdmi_phy_data *phy = hdmi->phy.data; 1379 unsigned int i; 1380 u16 val; 1381 1382 if (phy->gen == 1) { 1383 dw_hdmi_phy_enable_tmds(hdmi, 0); 1384 dw_hdmi_phy_enable_powerdown(hdmi, true); 1385 return; 1386 } 1387 1388 dw_hdmi_phy_gen2_txpwron(hdmi, 0); 1389 1390 /* 1391 * Wait for TX_PHY_LOCK to be deasserted to indicate that the PHY went 1392 * to low power mode. 1393 */ 1394 for (i = 0; i < 5; ++i) { 1395 val = hdmi_readb(hdmi, HDMI_PHY_STAT0); 1396 if (!(val & HDMI_PHY_TX_PHY_LOCK)) 1397 break; 1398 1399 usleep_range(1000, 2000); 1400 } 1401 1402 if (val & HDMI_PHY_TX_PHY_LOCK) 1403 dev_warn(hdmi->dev, "PHY failed to power down\n"); 1404 else 1405 dev_dbg(hdmi->dev, "PHY powered down in %u iterations\n", i); 1406 1407 dw_hdmi_phy_gen2_pddq(hdmi, 1); 1408 } 1409 1410 static int dw_hdmi_phy_power_on(struct dw_hdmi *hdmi) 1411 { 1412 const struct dw_hdmi_phy_data *phy = hdmi->phy.data; 1413 unsigned int i; 1414 u8 val; 1415 1416 if (phy->gen == 1) { 1417 dw_hdmi_phy_enable_powerdown(hdmi, false); 1418 1419 /* Toggle TMDS enable. */ 1420 dw_hdmi_phy_enable_tmds(hdmi, 0); 1421 dw_hdmi_phy_enable_tmds(hdmi, 1); 1422 return 0; 1423 } 1424 1425 dw_hdmi_phy_gen2_txpwron(hdmi, 1); 1426 dw_hdmi_phy_gen2_pddq(hdmi, 0); 1427 1428 /* Wait for PHY PLL lock */ 1429 for (i = 0; i < 5; ++i) { 1430 val = hdmi_readb(hdmi, HDMI_PHY_STAT0) & HDMI_PHY_TX_PHY_LOCK; 1431 if (val) 1432 break; 1433 1434 usleep_range(1000, 2000); 1435 } 1436 1437 if (!val) { 1438 dev_err(hdmi->dev, "PHY PLL failed to lock\n"); 1439 return -ETIMEDOUT; 1440 } 1441 1442 dev_dbg(hdmi->dev, "PHY PLL locked %u iterations\n", i); 1443 return 0; 1444 } 1445 1446 /* 1447 * PHY configuration function for the DWC HDMI 3D TX PHY. Based on the available 1448 * information the DWC MHL PHY has the same register layout and is thus also 1449 * supported by this function. 1450 */ 1451 static int hdmi_phy_configure_dwc_hdmi_3d_tx(struct dw_hdmi *hdmi, 1452 const struct dw_hdmi_plat_data *pdata, 1453 unsigned long mpixelclock) 1454 { 1455 const struct dw_hdmi_mpll_config *mpll_config = pdata->mpll_cfg; 1456 const struct dw_hdmi_curr_ctrl *curr_ctrl = pdata->cur_ctr; 1457 const struct dw_hdmi_phy_config *phy_config = pdata->phy_config; 1458 1459 /* TOFIX Will need 420 specific PHY configuration tables */ 1460 1461 /* PLL/MPLL Cfg - always match on final entry */ 1462 for (; mpll_config->mpixelclock != ~0UL; mpll_config++) 1463 if (mpixelclock <= mpll_config->mpixelclock) 1464 break; 1465 1466 for (; curr_ctrl->mpixelclock != ~0UL; curr_ctrl++) 1467 if (mpixelclock <= curr_ctrl->mpixelclock) 1468 break; 1469 1470 for (; phy_config->mpixelclock != ~0UL; phy_config++) 1471 if (mpixelclock <= phy_config->mpixelclock) 1472 break; 1473 1474 if (mpll_config->mpixelclock == ~0UL || 1475 curr_ctrl->mpixelclock == ~0UL || 1476 phy_config->mpixelclock == ~0UL) 1477 return -EINVAL; 1478 1479 dw_hdmi_phy_i2c_write(hdmi, mpll_config->res[0].cpce, 1480 HDMI_3D_TX_PHY_CPCE_CTRL); 1481 dw_hdmi_phy_i2c_write(hdmi, mpll_config->res[0].gmp, 1482 HDMI_3D_TX_PHY_GMPCTRL); 1483 dw_hdmi_phy_i2c_write(hdmi, curr_ctrl->curr[0], 1484 HDMI_3D_TX_PHY_CURRCTRL); 1485 1486 dw_hdmi_phy_i2c_write(hdmi, 0, HDMI_3D_TX_PHY_PLLPHBYCTRL); 1487 dw_hdmi_phy_i2c_write(hdmi, HDMI_3D_TX_PHY_MSM_CTRL_CKO_SEL_FB_CLK, 1488 HDMI_3D_TX_PHY_MSM_CTRL); 1489 1490 dw_hdmi_phy_i2c_write(hdmi, phy_config->term, HDMI_3D_TX_PHY_TXTERM); 1491 dw_hdmi_phy_i2c_write(hdmi, phy_config->sym_ctr, 1492 HDMI_3D_TX_PHY_CKSYMTXCTRL); 1493 dw_hdmi_phy_i2c_write(hdmi, phy_config->vlev_ctr, 1494 HDMI_3D_TX_PHY_VLEVCTRL); 1495 1496 /* Override and disable clock termination. */ 1497 dw_hdmi_phy_i2c_write(hdmi, HDMI_3D_TX_PHY_CKCALCTRL_OVERRIDE, 1498 HDMI_3D_TX_PHY_CKCALCTRL); 1499 1500 return 0; 1501 } 1502 1503 static int hdmi_phy_configure(struct dw_hdmi *hdmi, 1504 const struct drm_display_info *display) 1505 { 1506 const struct dw_hdmi_phy_data *phy = hdmi->phy.data; 1507 const struct dw_hdmi_plat_data *pdata = hdmi->plat_data; 1508 unsigned long mpixelclock = hdmi->hdmi_data.video_mode.mpixelclock; 1509 unsigned long mtmdsclock = hdmi->hdmi_data.video_mode.mtmdsclock; 1510 int ret; 1511 1512 dw_hdmi_phy_power_off(hdmi); 1513 1514 dw_hdmi_set_high_tmds_clock_ratio(hdmi, display); 1515 1516 /* Leave low power consumption mode by asserting SVSRET. */ 1517 if (phy->has_svsret) 1518 dw_hdmi_phy_enable_svsret(hdmi, 1); 1519 1520 dw_hdmi_phy_reset(hdmi); 1521 1522 hdmi_writeb(hdmi, HDMI_MC_HEACPHY_RST_ASSERT, HDMI_MC_HEACPHY_RST); 1523 1524 dw_hdmi_phy_i2c_set_addr(hdmi, HDMI_PHY_I2CM_SLAVE_ADDR_PHY_GEN2); 1525 1526 /* Write to the PHY as configured by the platform */ 1527 if (pdata->configure_phy) 1528 ret = pdata->configure_phy(hdmi, pdata->priv_data, mpixelclock); 1529 else 1530 ret = phy->configure(hdmi, pdata, mpixelclock); 1531 if (ret) { 1532 dev_err(hdmi->dev, "PHY configuration failed (clock %lu)\n", 1533 mpixelclock); 1534 return ret; 1535 } 1536 1537 /* Wait for resuming transmission of TMDS clock and data */ 1538 if (mtmdsclock > HDMI14_MAX_TMDSCLK) 1539 msleep(100); 1540 1541 return dw_hdmi_phy_power_on(hdmi); 1542 } 1543 1544 static int dw_hdmi_phy_init(struct dw_hdmi *hdmi, void *data, 1545 const struct drm_display_info *display, 1546 const struct drm_display_mode *mode) 1547 { 1548 int i, ret; 1549 1550 /* HDMI Phy spec says to do the phy initialization sequence twice */ 1551 for (i = 0; i < 2; i++) { 1552 dw_hdmi_phy_sel_data_en_pol(hdmi, 1); 1553 dw_hdmi_phy_sel_interface_control(hdmi, 0); 1554 1555 ret = hdmi_phy_configure(hdmi, display); 1556 if (ret) 1557 return ret; 1558 } 1559 1560 return 0; 1561 } 1562 1563 static void dw_hdmi_phy_disable(struct dw_hdmi *hdmi, void *data) 1564 { 1565 dw_hdmi_phy_power_off(hdmi); 1566 } 1567 1568 enum drm_connector_status dw_hdmi_phy_read_hpd(struct dw_hdmi *hdmi, 1569 void *data) 1570 { 1571 return hdmi_readb(hdmi, HDMI_PHY_STAT0) & HDMI_PHY_HPD ? 1572 connector_status_connected : connector_status_disconnected; 1573 } 1574 EXPORT_SYMBOL_GPL(dw_hdmi_phy_read_hpd); 1575 1576 void dw_hdmi_phy_update_hpd(struct dw_hdmi *hdmi, void *data, 1577 bool force, bool disabled, bool rxsense) 1578 { 1579 u8 old_mask = hdmi->phy_mask; 1580 1581 if (force || disabled || !rxsense) 1582 hdmi->phy_mask |= HDMI_PHY_RX_SENSE; 1583 else 1584 hdmi->phy_mask &= ~HDMI_PHY_RX_SENSE; 1585 1586 if (old_mask != hdmi->phy_mask) 1587 hdmi_writeb(hdmi, hdmi->phy_mask, HDMI_PHY_MASK0); 1588 } 1589 EXPORT_SYMBOL_GPL(dw_hdmi_phy_update_hpd); 1590 1591 void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data) 1592 { 1593 /* 1594 * Configure the PHY RX SENSE and HPD interrupts polarities and clear 1595 * any pending interrupt. 1596 */ 1597 hdmi_writeb(hdmi, HDMI_PHY_HPD | HDMI_PHY_RX_SENSE, HDMI_PHY_POL0); 1598 hdmi_writeb(hdmi, HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE, 1599 HDMI_IH_PHY_STAT0); 1600 1601 /* Enable cable hot plug irq. */ 1602 hdmi_writeb(hdmi, hdmi->phy_mask, HDMI_PHY_MASK0); 1603 1604 /* Clear and unmute interrupts. */ 1605 hdmi_writeb(hdmi, HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE, 1606 HDMI_IH_PHY_STAT0); 1607 hdmi_writeb(hdmi, ~(HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE), 1608 HDMI_IH_MUTE_PHY_STAT0); 1609 } 1610 EXPORT_SYMBOL_GPL(dw_hdmi_phy_setup_hpd); 1611 1612 static const struct dw_hdmi_phy_ops dw_hdmi_synopsys_phy_ops = { 1613 .init = dw_hdmi_phy_init, 1614 .disable = dw_hdmi_phy_disable, 1615 .read_hpd = dw_hdmi_phy_read_hpd, 1616 .update_hpd = dw_hdmi_phy_update_hpd, 1617 .setup_hpd = dw_hdmi_phy_setup_hpd, 1618 }; 1619 1620 /* ----------------------------------------------------------------------------- 1621 * HDMI TX Setup 1622 */ 1623 1624 static void hdmi_tx_hdcp_config(struct dw_hdmi *hdmi) 1625 { 1626 u8 de; 1627 1628 if (hdmi->hdmi_data.video_mode.mdataenablepolarity) 1629 de = HDMI_A_VIDPOLCFG_DATAENPOL_ACTIVE_HIGH; 1630 else 1631 de = HDMI_A_VIDPOLCFG_DATAENPOL_ACTIVE_LOW; 1632 1633 /* disable rx detect */ 1634 hdmi_modb(hdmi, HDMI_A_HDCPCFG0_RXDETECT_DISABLE, 1635 HDMI_A_HDCPCFG0_RXDETECT_MASK, HDMI_A_HDCPCFG0); 1636 1637 hdmi_modb(hdmi, de, HDMI_A_VIDPOLCFG_DATAENPOL_MASK, HDMI_A_VIDPOLCFG); 1638 1639 hdmi_modb(hdmi, HDMI_A_HDCPCFG1_ENCRYPTIONDISABLE_DISABLE, 1640 HDMI_A_HDCPCFG1_ENCRYPTIONDISABLE_MASK, HDMI_A_HDCPCFG1); 1641 } 1642 1643 static void hdmi_config_AVI(struct dw_hdmi *hdmi, 1644 const struct drm_connector *connector, 1645 const struct drm_display_mode *mode) 1646 { 1647 struct hdmi_avi_infoframe frame; 1648 u8 val; 1649 1650 /* Initialise info frame from DRM mode */ 1651 drm_hdmi_avi_infoframe_from_display_mode(&frame, connector, mode); 1652 1653 if (hdmi_bus_fmt_is_rgb(hdmi->hdmi_data.enc_out_bus_format)) { 1654 drm_hdmi_avi_infoframe_quant_range(&frame, connector, mode, 1655 hdmi->hdmi_data.rgb_limited_range ? 1656 HDMI_QUANTIZATION_RANGE_LIMITED : 1657 HDMI_QUANTIZATION_RANGE_FULL); 1658 } else { 1659 frame.quantization_range = HDMI_QUANTIZATION_RANGE_DEFAULT; 1660 frame.ycc_quantization_range = 1661 HDMI_YCC_QUANTIZATION_RANGE_LIMITED; 1662 } 1663 1664 if (hdmi_bus_fmt_is_yuv444(hdmi->hdmi_data.enc_out_bus_format)) 1665 frame.colorspace = HDMI_COLORSPACE_YUV444; 1666 else if (hdmi_bus_fmt_is_yuv422(hdmi->hdmi_data.enc_out_bus_format)) 1667 frame.colorspace = HDMI_COLORSPACE_YUV422; 1668 else if (hdmi_bus_fmt_is_yuv420(hdmi->hdmi_data.enc_out_bus_format)) 1669 frame.colorspace = HDMI_COLORSPACE_YUV420; 1670 else 1671 frame.colorspace = HDMI_COLORSPACE_RGB; 1672 1673 /* Set up colorimetry */ 1674 if (!hdmi_bus_fmt_is_rgb(hdmi->hdmi_data.enc_out_bus_format)) { 1675 switch (hdmi->hdmi_data.enc_out_encoding) { 1676 case V4L2_YCBCR_ENC_601: 1677 if (hdmi->hdmi_data.enc_in_encoding == V4L2_YCBCR_ENC_XV601) 1678 frame.colorimetry = HDMI_COLORIMETRY_EXTENDED; 1679 else 1680 frame.colorimetry = HDMI_COLORIMETRY_ITU_601; 1681 frame.extended_colorimetry = 1682 HDMI_EXTENDED_COLORIMETRY_XV_YCC_601; 1683 break; 1684 case V4L2_YCBCR_ENC_709: 1685 if (hdmi->hdmi_data.enc_in_encoding == V4L2_YCBCR_ENC_XV709) 1686 frame.colorimetry = HDMI_COLORIMETRY_EXTENDED; 1687 else 1688 frame.colorimetry = HDMI_COLORIMETRY_ITU_709; 1689 frame.extended_colorimetry = 1690 HDMI_EXTENDED_COLORIMETRY_XV_YCC_709; 1691 break; 1692 default: /* Carries no data */ 1693 frame.colorimetry = HDMI_COLORIMETRY_ITU_601; 1694 frame.extended_colorimetry = 1695 HDMI_EXTENDED_COLORIMETRY_XV_YCC_601; 1696 break; 1697 } 1698 } else { 1699 frame.colorimetry = HDMI_COLORIMETRY_NONE; 1700 frame.extended_colorimetry = 1701 HDMI_EXTENDED_COLORIMETRY_XV_YCC_601; 1702 } 1703 1704 /* 1705 * The Designware IP uses a different byte format from standard 1706 * AVI info frames, though generally the bits are in the correct 1707 * bytes. 1708 */ 1709 1710 /* 1711 * AVI data byte 1 differences: Colorspace in bits 0,1 rather than 5,6, 1712 * scan info in bits 4,5 rather than 0,1 and active aspect present in 1713 * bit 6 rather than 4. 1714 */ 1715 val = (frame.scan_mode & 3) << 4 | (frame.colorspace & 3); 1716 if (frame.active_aspect & 15) 1717 val |= HDMI_FC_AVICONF0_ACTIVE_FMT_INFO_PRESENT; 1718 if (frame.top_bar || frame.bottom_bar) 1719 val |= HDMI_FC_AVICONF0_BAR_DATA_HORIZ_BAR; 1720 if (frame.left_bar || frame.right_bar) 1721 val |= HDMI_FC_AVICONF0_BAR_DATA_VERT_BAR; 1722 hdmi_writeb(hdmi, val, HDMI_FC_AVICONF0); 1723 1724 /* AVI data byte 2 differences: none */ 1725 val = ((frame.colorimetry & 0x3) << 6) | 1726 ((frame.picture_aspect & 0x3) << 4) | 1727 (frame.active_aspect & 0xf); 1728 hdmi_writeb(hdmi, val, HDMI_FC_AVICONF1); 1729 1730 /* AVI data byte 3 differences: none */ 1731 val = ((frame.extended_colorimetry & 0x7) << 4) | 1732 ((frame.quantization_range & 0x3) << 2) | 1733 (frame.nups & 0x3); 1734 if (frame.itc) 1735 val |= HDMI_FC_AVICONF2_IT_CONTENT_VALID; 1736 hdmi_writeb(hdmi, val, HDMI_FC_AVICONF2); 1737 1738 /* AVI data byte 4 differences: none */ 1739 val = frame.video_code & 0x7f; 1740 hdmi_writeb(hdmi, val, HDMI_FC_AVIVID); 1741 1742 /* AVI Data Byte 5- set up input and output pixel repetition */ 1743 val = (((hdmi->hdmi_data.video_mode.mpixelrepetitioninput + 1) << 1744 HDMI_FC_PRCONF_INCOMING_PR_FACTOR_OFFSET) & 1745 HDMI_FC_PRCONF_INCOMING_PR_FACTOR_MASK) | 1746 ((hdmi->hdmi_data.video_mode.mpixelrepetitionoutput << 1747 HDMI_FC_PRCONF_OUTPUT_PR_FACTOR_OFFSET) & 1748 HDMI_FC_PRCONF_OUTPUT_PR_FACTOR_MASK); 1749 hdmi_writeb(hdmi, val, HDMI_FC_PRCONF); 1750 1751 /* 1752 * AVI data byte 5 differences: content type in 0,1 rather than 4,5, 1753 * ycc range in bits 2,3 rather than 6,7 1754 */ 1755 val = ((frame.ycc_quantization_range & 0x3) << 2) | 1756 (frame.content_type & 0x3); 1757 hdmi_writeb(hdmi, val, HDMI_FC_AVICONF3); 1758 1759 /* AVI Data Bytes 6-13 */ 1760 hdmi_writeb(hdmi, frame.top_bar & 0xff, HDMI_FC_AVIETB0); 1761 hdmi_writeb(hdmi, (frame.top_bar >> 8) & 0xff, HDMI_FC_AVIETB1); 1762 hdmi_writeb(hdmi, frame.bottom_bar & 0xff, HDMI_FC_AVISBB0); 1763 hdmi_writeb(hdmi, (frame.bottom_bar >> 8) & 0xff, HDMI_FC_AVISBB1); 1764 hdmi_writeb(hdmi, frame.left_bar & 0xff, HDMI_FC_AVIELB0); 1765 hdmi_writeb(hdmi, (frame.left_bar >> 8) & 0xff, HDMI_FC_AVIELB1); 1766 hdmi_writeb(hdmi, frame.right_bar & 0xff, HDMI_FC_AVISRB0); 1767 hdmi_writeb(hdmi, (frame.right_bar >> 8) & 0xff, HDMI_FC_AVISRB1); 1768 } 1769 1770 static void hdmi_config_vendor_specific_infoframe(struct dw_hdmi *hdmi, 1771 const struct drm_connector *connector, 1772 const struct drm_display_mode *mode) 1773 { 1774 struct hdmi_vendor_infoframe frame; 1775 u8 buffer[10]; 1776 ssize_t err; 1777 1778 err = drm_hdmi_vendor_infoframe_from_display_mode(&frame, connector, 1779 mode); 1780 if (err < 0) 1781 /* 1782 * Going into that statement does not means vendor infoframe 1783 * fails. It just informed us that vendor infoframe is not 1784 * needed for the selected mode. Only 4k or stereoscopic 3D 1785 * mode requires vendor infoframe. So just simply return. 1786 */ 1787 return; 1788 1789 err = hdmi_vendor_infoframe_pack(&frame, buffer, sizeof(buffer)); 1790 if (err < 0) { 1791 dev_err(hdmi->dev, "Failed to pack vendor infoframe: %zd\n", 1792 err); 1793 return; 1794 } 1795 hdmi_mask_writeb(hdmi, 0, HDMI_FC_DATAUTO0, HDMI_FC_DATAUTO0_VSD_OFFSET, 1796 HDMI_FC_DATAUTO0_VSD_MASK); 1797 1798 /* Set the length of HDMI vendor specific InfoFrame payload */ 1799 hdmi_writeb(hdmi, buffer[2], HDMI_FC_VSDSIZE); 1800 1801 /* Set 24bit IEEE Registration Identifier */ 1802 hdmi_writeb(hdmi, buffer[4], HDMI_FC_VSDIEEEID0); 1803 hdmi_writeb(hdmi, buffer[5], HDMI_FC_VSDIEEEID1); 1804 hdmi_writeb(hdmi, buffer[6], HDMI_FC_VSDIEEEID2); 1805 1806 /* Set HDMI_Video_Format and HDMI_VIC/3D_Structure */ 1807 hdmi_writeb(hdmi, buffer[7], HDMI_FC_VSDPAYLOAD0); 1808 hdmi_writeb(hdmi, buffer[8], HDMI_FC_VSDPAYLOAD1); 1809 1810 if (frame.s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF) 1811 hdmi_writeb(hdmi, buffer[9], HDMI_FC_VSDPAYLOAD2); 1812 1813 /* Packet frame interpolation */ 1814 hdmi_writeb(hdmi, 1, HDMI_FC_DATAUTO1); 1815 1816 /* Auto packets per frame and line spacing */ 1817 hdmi_writeb(hdmi, 0x11, HDMI_FC_DATAUTO2); 1818 1819 /* Configures the Frame Composer On RDRB mode */ 1820 hdmi_mask_writeb(hdmi, 1, HDMI_FC_DATAUTO0, HDMI_FC_DATAUTO0_VSD_OFFSET, 1821 HDMI_FC_DATAUTO0_VSD_MASK); 1822 } 1823 1824 static void hdmi_config_drm_infoframe(struct dw_hdmi *hdmi, 1825 const struct drm_connector *connector) 1826 { 1827 const struct drm_connector_state *conn_state = connector->state; 1828 struct hdmi_drm_infoframe frame; 1829 u8 buffer[30]; 1830 ssize_t err; 1831 int i; 1832 1833 if (!hdmi->plat_data->use_drm_infoframe) 1834 return; 1835 1836 hdmi_modb(hdmi, HDMI_FC_PACKET_TX_EN_DRM_DISABLE, 1837 HDMI_FC_PACKET_TX_EN_DRM_MASK, HDMI_FC_PACKET_TX_EN); 1838 1839 err = drm_hdmi_infoframe_set_hdr_metadata(&frame, conn_state); 1840 if (err < 0) 1841 return; 1842 1843 err = hdmi_drm_infoframe_pack(&frame, buffer, sizeof(buffer)); 1844 if (err < 0) { 1845 dev_err(hdmi->dev, "Failed to pack drm infoframe: %zd\n", err); 1846 return; 1847 } 1848 1849 hdmi_writeb(hdmi, frame.version, HDMI_FC_DRM_HB0); 1850 hdmi_writeb(hdmi, frame.length, HDMI_FC_DRM_HB1); 1851 1852 for (i = 0; i < frame.length; i++) 1853 hdmi_writeb(hdmi, buffer[4 + i], HDMI_FC_DRM_PB0 + i); 1854 1855 hdmi_writeb(hdmi, 1, HDMI_FC_DRM_UP); 1856 hdmi_modb(hdmi, HDMI_FC_PACKET_TX_EN_DRM_ENABLE, 1857 HDMI_FC_PACKET_TX_EN_DRM_MASK, HDMI_FC_PACKET_TX_EN); 1858 } 1859 1860 static void hdmi_av_composer(struct dw_hdmi *hdmi, 1861 const struct drm_display_info *display, 1862 const struct drm_display_mode *mode) 1863 { 1864 u8 inv_val, bytes; 1865 const struct drm_hdmi_info *hdmi_info = &display->hdmi; 1866 struct hdmi_vmode *vmode = &hdmi->hdmi_data.video_mode; 1867 int hblank, vblank, h_de_hs, v_de_vs, hsync_len, vsync_len; 1868 unsigned int vdisplay, hdisplay; 1869 1870 vmode->mpixelclock = mode->clock * 1000; 1871 1872 dev_dbg(hdmi->dev, "final pixclk = %d\n", vmode->mpixelclock); 1873 1874 vmode->mtmdsclock = vmode->mpixelclock; 1875 1876 if (!hdmi_bus_fmt_is_yuv422(hdmi->hdmi_data.enc_out_bus_format)) { 1877 switch (hdmi_bus_fmt_color_depth( 1878 hdmi->hdmi_data.enc_out_bus_format)) { 1879 case 16: 1880 vmode->mtmdsclock = vmode->mpixelclock * 2; 1881 break; 1882 case 12: 1883 vmode->mtmdsclock = vmode->mpixelclock * 3 / 2; 1884 break; 1885 case 10: 1886 vmode->mtmdsclock = vmode->mpixelclock * 5 / 4; 1887 break; 1888 } 1889 } 1890 1891 if (hdmi_bus_fmt_is_yuv420(hdmi->hdmi_data.enc_out_bus_format)) 1892 vmode->mtmdsclock /= 2; 1893 1894 dev_dbg(hdmi->dev, "final tmdsclock = %d\n", vmode->mtmdsclock); 1895 1896 /* Set up HDMI_FC_INVIDCONF */ 1897 inv_val = (hdmi->hdmi_data.hdcp_enable || 1898 (dw_hdmi_support_scdc(hdmi, display) && 1899 (vmode->mtmdsclock > HDMI14_MAX_TMDSCLK || 1900 hdmi_info->scdc.scrambling.low_rates)) ? 1901 HDMI_FC_INVIDCONF_HDCP_KEEPOUT_ACTIVE : 1902 HDMI_FC_INVIDCONF_HDCP_KEEPOUT_INACTIVE); 1903 1904 inv_val |= mode->flags & DRM_MODE_FLAG_PVSYNC ? 1905 HDMI_FC_INVIDCONF_VSYNC_IN_POLARITY_ACTIVE_HIGH : 1906 HDMI_FC_INVIDCONF_VSYNC_IN_POLARITY_ACTIVE_LOW; 1907 1908 inv_val |= mode->flags & DRM_MODE_FLAG_PHSYNC ? 1909 HDMI_FC_INVIDCONF_HSYNC_IN_POLARITY_ACTIVE_HIGH : 1910 HDMI_FC_INVIDCONF_HSYNC_IN_POLARITY_ACTIVE_LOW; 1911 1912 inv_val |= (vmode->mdataenablepolarity ? 1913 HDMI_FC_INVIDCONF_DE_IN_POLARITY_ACTIVE_HIGH : 1914 HDMI_FC_INVIDCONF_DE_IN_POLARITY_ACTIVE_LOW); 1915 1916 if (hdmi->vic == 39) 1917 inv_val |= HDMI_FC_INVIDCONF_R_V_BLANK_IN_OSC_ACTIVE_HIGH; 1918 else 1919 inv_val |= mode->flags & DRM_MODE_FLAG_INTERLACE ? 1920 HDMI_FC_INVIDCONF_R_V_BLANK_IN_OSC_ACTIVE_HIGH : 1921 HDMI_FC_INVIDCONF_R_V_BLANK_IN_OSC_ACTIVE_LOW; 1922 1923 inv_val |= mode->flags & DRM_MODE_FLAG_INTERLACE ? 1924 HDMI_FC_INVIDCONF_IN_I_P_INTERLACED : 1925 HDMI_FC_INVIDCONF_IN_I_P_PROGRESSIVE; 1926 1927 inv_val |= hdmi->sink_is_hdmi ? 1928 HDMI_FC_INVIDCONF_DVI_MODEZ_HDMI_MODE : 1929 HDMI_FC_INVIDCONF_DVI_MODEZ_DVI_MODE; 1930 1931 hdmi_writeb(hdmi, inv_val, HDMI_FC_INVIDCONF); 1932 1933 hdisplay = mode->hdisplay; 1934 hblank = mode->htotal - mode->hdisplay; 1935 h_de_hs = mode->hsync_start - mode->hdisplay; 1936 hsync_len = mode->hsync_end - mode->hsync_start; 1937 1938 /* 1939 * When we're setting a YCbCr420 mode, we need 1940 * to adjust the horizontal timing to suit. 1941 */ 1942 if (hdmi_bus_fmt_is_yuv420(hdmi->hdmi_data.enc_out_bus_format)) { 1943 hdisplay /= 2; 1944 hblank /= 2; 1945 h_de_hs /= 2; 1946 hsync_len /= 2; 1947 } 1948 1949 vdisplay = mode->vdisplay; 1950 vblank = mode->vtotal - mode->vdisplay; 1951 v_de_vs = mode->vsync_start - mode->vdisplay; 1952 vsync_len = mode->vsync_end - mode->vsync_start; 1953 1954 /* 1955 * When we're setting an interlaced mode, we need 1956 * to adjust the vertical timing to suit. 1957 */ 1958 if (mode->flags & DRM_MODE_FLAG_INTERLACE) { 1959 vdisplay /= 2; 1960 vblank /= 2; 1961 v_de_vs /= 2; 1962 vsync_len /= 2; 1963 } 1964 1965 /* Scrambling Control */ 1966 if (dw_hdmi_support_scdc(hdmi, display)) { 1967 if (vmode->mtmdsclock > HDMI14_MAX_TMDSCLK || 1968 hdmi_info->scdc.scrambling.low_rates) { 1969 /* 1970 * HDMI2.0 Specifies the following procedure: 1971 * After the Source Device has determined that 1972 * SCDC_Present is set (=1), the Source Device should 1973 * write the accurate Version of the Source Device 1974 * to the Source Version field in the SCDCS. 1975 * Source Devices compliant shall set the 1976 * Source Version = 1. 1977 */ 1978 drm_scdc_readb(hdmi->ddc, SCDC_SINK_VERSION, 1979 &bytes); 1980 drm_scdc_writeb(hdmi->ddc, SCDC_SOURCE_VERSION, 1981 min_t(u8, bytes, SCDC_MIN_SOURCE_VERSION)); 1982 1983 /* Enabled Scrambling in the Sink */ 1984 drm_scdc_set_scrambling(hdmi->ddc, 1); 1985 1986 /* 1987 * To activate the scrambler feature, you must ensure 1988 * that the quasi-static configuration bit 1989 * fc_invidconf.HDCP_keepout is set at configuration 1990 * time, before the required mc_swrstzreq.tmdsswrst_req 1991 * reset request is issued. 1992 */ 1993 hdmi_writeb(hdmi, (u8)~HDMI_MC_SWRSTZ_TMDSSWRST_REQ, 1994 HDMI_MC_SWRSTZ); 1995 hdmi_writeb(hdmi, 1, HDMI_FC_SCRAMBLER_CTRL); 1996 } else { 1997 hdmi_writeb(hdmi, 0, HDMI_FC_SCRAMBLER_CTRL); 1998 hdmi_writeb(hdmi, (u8)~HDMI_MC_SWRSTZ_TMDSSWRST_REQ, 1999 HDMI_MC_SWRSTZ); 2000 drm_scdc_set_scrambling(hdmi->ddc, 0); 2001 } 2002 } 2003 2004 /* Set up horizontal active pixel width */ 2005 hdmi_writeb(hdmi, hdisplay >> 8, HDMI_FC_INHACTV1); 2006 hdmi_writeb(hdmi, hdisplay, HDMI_FC_INHACTV0); 2007 2008 /* Set up vertical active lines */ 2009 hdmi_writeb(hdmi, vdisplay >> 8, HDMI_FC_INVACTV1); 2010 hdmi_writeb(hdmi, vdisplay, HDMI_FC_INVACTV0); 2011 2012 /* Set up horizontal blanking pixel region width */ 2013 hdmi_writeb(hdmi, hblank >> 8, HDMI_FC_INHBLANK1); 2014 hdmi_writeb(hdmi, hblank, HDMI_FC_INHBLANK0); 2015 2016 /* Set up vertical blanking pixel region width */ 2017 hdmi_writeb(hdmi, vblank, HDMI_FC_INVBLANK); 2018 2019 /* Set up HSYNC active edge delay width (in pixel clks) */ 2020 hdmi_writeb(hdmi, h_de_hs >> 8, HDMI_FC_HSYNCINDELAY1); 2021 hdmi_writeb(hdmi, h_de_hs, HDMI_FC_HSYNCINDELAY0); 2022 2023 /* Set up VSYNC active edge delay (in lines) */ 2024 hdmi_writeb(hdmi, v_de_vs, HDMI_FC_VSYNCINDELAY); 2025 2026 /* Set up HSYNC active pulse width (in pixel clks) */ 2027 hdmi_writeb(hdmi, hsync_len >> 8, HDMI_FC_HSYNCINWIDTH1); 2028 hdmi_writeb(hdmi, hsync_len, HDMI_FC_HSYNCINWIDTH0); 2029 2030 /* Set up VSYNC active edge delay (in lines) */ 2031 hdmi_writeb(hdmi, vsync_len, HDMI_FC_VSYNCINWIDTH); 2032 } 2033 2034 /* HDMI Initialization Step B.4 */ 2035 static void dw_hdmi_enable_video_path(struct dw_hdmi *hdmi) 2036 { 2037 /* control period minimum duration */ 2038 hdmi_writeb(hdmi, 12, HDMI_FC_CTRLDUR); 2039 hdmi_writeb(hdmi, 32, HDMI_FC_EXCTRLDUR); 2040 hdmi_writeb(hdmi, 1, HDMI_FC_EXCTRLSPAC); 2041 2042 /* Set to fill TMDS data channels */ 2043 hdmi_writeb(hdmi, 0x0B, HDMI_FC_CH0PREAM); 2044 hdmi_writeb(hdmi, 0x16, HDMI_FC_CH1PREAM); 2045 hdmi_writeb(hdmi, 0x21, HDMI_FC_CH2PREAM); 2046 2047 /* Enable pixel clock and tmds data path */ 2048 hdmi->mc_clkdis |= HDMI_MC_CLKDIS_HDCPCLK_DISABLE | 2049 HDMI_MC_CLKDIS_CSCCLK_DISABLE | 2050 HDMI_MC_CLKDIS_AUDCLK_DISABLE | 2051 HDMI_MC_CLKDIS_PREPCLK_DISABLE | 2052 HDMI_MC_CLKDIS_TMDSCLK_DISABLE; 2053 hdmi->mc_clkdis &= ~HDMI_MC_CLKDIS_PIXELCLK_DISABLE; 2054 hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS); 2055 2056 hdmi->mc_clkdis &= ~HDMI_MC_CLKDIS_TMDSCLK_DISABLE; 2057 hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS); 2058 2059 /* Enable csc path */ 2060 if (is_csc_needed(hdmi)) { 2061 hdmi->mc_clkdis &= ~HDMI_MC_CLKDIS_CSCCLK_DISABLE; 2062 hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS); 2063 2064 hdmi_writeb(hdmi, HDMI_MC_FLOWCTRL_FEED_THROUGH_OFF_CSC_IN_PATH, 2065 HDMI_MC_FLOWCTRL); 2066 } else { 2067 hdmi->mc_clkdis |= HDMI_MC_CLKDIS_CSCCLK_DISABLE; 2068 hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS); 2069 2070 hdmi_writeb(hdmi, HDMI_MC_FLOWCTRL_FEED_THROUGH_OFF_CSC_BYPASS, 2071 HDMI_MC_FLOWCTRL); 2072 } 2073 } 2074 2075 /* Workaround to clear the overflow condition */ 2076 static void dw_hdmi_clear_overflow(struct dw_hdmi *hdmi) 2077 { 2078 unsigned int count; 2079 unsigned int i; 2080 u8 val; 2081 2082 /* 2083 * Under some circumstances the Frame Composer arithmetic unit can miss 2084 * an FC register write due to being busy processing the previous one. 2085 * The issue can be worked around by issuing a TMDS software reset and 2086 * then write one of the FC registers several times. 2087 * 2088 * The number of iterations matters and depends on the HDMI TX revision 2089 * (and possibly on the platform). So far i.MX6Q (v1.30a), i.MX6DL 2090 * (v1.31a) and multiple Allwinner SoCs (v1.32a) have been identified 2091 * as needing the workaround, with 4 iterations for v1.30a and 1 2092 * iteration for others. 2093 * The Amlogic Meson GX SoCs (v2.01a) have been identified as needing 2094 * the workaround with a single iteration. 2095 * The Rockchip RK3288 SoC (v2.00a) and RK3328/RK3399 SoCs (v2.11a) have 2096 * been identified as needing the workaround with a single iteration. 2097 */ 2098 2099 switch (hdmi->version) { 2100 case 0x130a: 2101 count = 4; 2102 break; 2103 case 0x131a: 2104 case 0x132a: 2105 case 0x200a: 2106 case 0x201a: 2107 case 0x211a: 2108 case 0x212a: 2109 count = 1; 2110 break; 2111 default: 2112 return; 2113 } 2114 2115 /* TMDS software reset */ 2116 hdmi_writeb(hdmi, (u8)~HDMI_MC_SWRSTZ_TMDSSWRST_REQ, HDMI_MC_SWRSTZ); 2117 2118 val = hdmi_readb(hdmi, HDMI_FC_INVIDCONF); 2119 for (i = 0; i < count; i++) 2120 hdmi_writeb(hdmi, val, HDMI_FC_INVIDCONF); 2121 } 2122 2123 static void hdmi_disable_overflow_interrupts(struct dw_hdmi *hdmi) 2124 { 2125 hdmi_writeb(hdmi, HDMI_IH_MUTE_FC_STAT2_OVERFLOW_MASK, 2126 HDMI_IH_MUTE_FC_STAT2); 2127 } 2128 2129 static int dw_hdmi_setup(struct dw_hdmi *hdmi, 2130 const struct drm_connector *connector, 2131 const struct drm_display_mode *mode) 2132 { 2133 int ret; 2134 2135 hdmi_disable_overflow_interrupts(hdmi); 2136 2137 hdmi->vic = drm_match_cea_mode(mode); 2138 2139 if (!hdmi->vic) { 2140 dev_dbg(hdmi->dev, "Non-CEA mode used in HDMI\n"); 2141 } else { 2142 dev_dbg(hdmi->dev, "CEA mode used vic=%d\n", hdmi->vic); 2143 } 2144 2145 if ((hdmi->vic == 6) || (hdmi->vic == 7) || 2146 (hdmi->vic == 21) || (hdmi->vic == 22) || 2147 (hdmi->vic == 2) || (hdmi->vic == 3) || 2148 (hdmi->vic == 17) || (hdmi->vic == 18)) 2149 hdmi->hdmi_data.enc_out_encoding = V4L2_YCBCR_ENC_601; 2150 else 2151 hdmi->hdmi_data.enc_out_encoding = V4L2_YCBCR_ENC_709; 2152 2153 hdmi->hdmi_data.video_mode.mpixelrepetitionoutput = 0; 2154 hdmi->hdmi_data.video_mode.mpixelrepetitioninput = 0; 2155 2156 if (hdmi->hdmi_data.enc_in_bus_format == MEDIA_BUS_FMT_FIXED) 2157 hdmi->hdmi_data.enc_in_bus_format = MEDIA_BUS_FMT_RGB888_1X24; 2158 2159 /* TOFIX: Get input encoding from plat data or fallback to none */ 2160 if (hdmi->plat_data->input_bus_encoding) 2161 hdmi->hdmi_data.enc_in_encoding = 2162 hdmi->plat_data->input_bus_encoding; 2163 else 2164 hdmi->hdmi_data.enc_in_encoding = V4L2_YCBCR_ENC_DEFAULT; 2165 2166 if (hdmi->hdmi_data.enc_out_bus_format == MEDIA_BUS_FMT_FIXED) 2167 hdmi->hdmi_data.enc_out_bus_format = MEDIA_BUS_FMT_RGB888_1X24; 2168 2169 hdmi->hdmi_data.rgb_limited_range = hdmi->sink_is_hdmi && 2170 drm_default_rgb_quant_range(mode) == 2171 HDMI_QUANTIZATION_RANGE_LIMITED; 2172 2173 hdmi->hdmi_data.pix_repet_factor = 0; 2174 hdmi->hdmi_data.hdcp_enable = 0; 2175 hdmi->hdmi_data.video_mode.mdataenablepolarity = true; 2176 2177 /* HDMI Initialization Step B.1 */ 2178 hdmi_av_composer(hdmi, &connector->display_info, mode); 2179 2180 /* HDMI Initializateion Step B.2 */ 2181 ret = hdmi->phy.ops->init(hdmi, hdmi->phy.data, 2182 &connector->display_info, 2183 &hdmi->previous_mode); 2184 if (ret) 2185 return ret; 2186 hdmi->phy.enabled = true; 2187 2188 /* HDMI Initialization Step B.3 */ 2189 dw_hdmi_enable_video_path(hdmi); 2190 2191 if (hdmi->sink_has_audio) { 2192 dev_dbg(hdmi->dev, "sink has audio support\n"); 2193 2194 /* HDMI Initialization Step E - Configure audio */ 2195 hdmi_clk_regenerator_update_pixel_clock(hdmi); 2196 hdmi_enable_audio_clk(hdmi, hdmi->audio_enable); 2197 } 2198 2199 /* not for DVI mode */ 2200 if (hdmi->sink_is_hdmi) { 2201 dev_dbg(hdmi->dev, "%s HDMI mode\n", __func__); 2202 2203 /* HDMI Initialization Step F - Configure AVI InfoFrame */ 2204 hdmi_config_AVI(hdmi, connector, mode); 2205 hdmi_config_vendor_specific_infoframe(hdmi, connector, mode); 2206 hdmi_config_drm_infoframe(hdmi, connector); 2207 } else { 2208 dev_dbg(hdmi->dev, "%s DVI mode\n", __func__); 2209 } 2210 2211 hdmi_video_packetize(hdmi); 2212 hdmi_video_csc(hdmi); 2213 hdmi_video_sample(hdmi); 2214 hdmi_tx_hdcp_config(hdmi); 2215 2216 dw_hdmi_clear_overflow(hdmi); 2217 2218 return 0; 2219 } 2220 2221 static void initialize_hdmi_ih_mutes(struct dw_hdmi *hdmi) 2222 { 2223 u8 ih_mute; 2224 2225 /* 2226 * Boot up defaults are: 2227 * HDMI_IH_MUTE = 0x03 (disabled) 2228 * HDMI_IH_MUTE_* = 0x00 (enabled) 2229 * 2230 * Disable top level interrupt bits in HDMI block 2231 */ 2232 ih_mute = hdmi_readb(hdmi, HDMI_IH_MUTE) | 2233 HDMI_IH_MUTE_MUTE_WAKEUP_INTERRUPT | 2234 HDMI_IH_MUTE_MUTE_ALL_INTERRUPT; 2235 2236 hdmi_writeb(hdmi, ih_mute, HDMI_IH_MUTE); 2237 2238 /* by default mask all interrupts */ 2239 hdmi_writeb(hdmi, 0xff, HDMI_VP_MASK); 2240 hdmi_writeb(hdmi, 0xff, HDMI_FC_MASK0); 2241 hdmi_writeb(hdmi, 0xff, HDMI_FC_MASK1); 2242 hdmi_writeb(hdmi, 0xff, HDMI_FC_MASK2); 2243 hdmi_writeb(hdmi, 0xff, HDMI_PHY_MASK0); 2244 hdmi_writeb(hdmi, 0xff, HDMI_PHY_I2CM_INT_ADDR); 2245 hdmi_writeb(hdmi, 0xff, HDMI_PHY_I2CM_CTLINT_ADDR); 2246 hdmi_writeb(hdmi, 0xff, HDMI_AUD_INT); 2247 hdmi_writeb(hdmi, 0xff, HDMI_AUD_SPDIFINT); 2248 hdmi_writeb(hdmi, 0xff, HDMI_AUD_HBR_MASK); 2249 hdmi_writeb(hdmi, 0xff, HDMI_GP_MASK); 2250 hdmi_writeb(hdmi, 0xff, HDMI_A_APIINTMSK); 2251 hdmi_writeb(hdmi, 0xff, HDMI_I2CM_INT); 2252 hdmi_writeb(hdmi, 0xff, HDMI_I2CM_CTLINT); 2253 2254 /* Disable interrupts in the IH_MUTE_* registers */ 2255 hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_FC_STAT0); 2256 hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_FC_STAT1); 2257 hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_FC_STAT2); 2258 hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_AS_STAT0); 2259 hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_PHY_STAT0); 2260 hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_I2CM_STAT0); 2261 hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_CEC_STAT0); 2262 hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_VP_STAT0); 2263 hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_I2CMPHY_STAT0); 2264 hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_AHBDMAAUD_STAT0); 2265 2266 /* Enable top level interrupt bits in HDMI block */ 2267 ih_mute &= ~(HDMI_IH_MUTE_MUTE_WAKEUP_INTERRUPT | 2268 HDMI_IH_MUTE_MUTE_ALL_INTERRUPT); 2269 hdmi_writeb(hdmi, ih_mute, HDMI_IH_MUTE); 2270 } 2271 2272 static void dw_hdmi_poweron(struct dw_hdmi *hdmi) 2273 { 2274 hdmi->bridge_is_on = true; 2275 2276 /* 2277 * The curr_conn field is guaranteed to be valid here, as this function 2278 * is only be called when !hdmi->disabled. 2279 */ 2280 dw_hdmi_setup(hdmi, hdmi->curr_conn, &hdmi->previous_mode); 2281 } 2282 2283 static void dw_hdmi_poweroff(struct dw_hdmi *hdmi) 2284 { 2285 if (hdmi->phy.enabled) { 2286 hdmi->phy.ops->disable(hdmi, hdmi->phy.data); 2287 hdmi->phy.enabled = false; 2288 } 2289 2290 hdmi->bridge_is_on = false; 2291 } 2292 2293 static void dw_hdmi_update_power(struct dw_hdmi *hdmi) 2294 { 2295 int force = hdmi->force; 2296 2297 if (hdmi->disabled) { 2298 force = DRM_FORCE_OFF; 2299 } else if (force == DRM_FORCE_UNSPECIFIED) { 2300 if (hdmi->rxsense) 2301 force = DRM_FORCE_ON; 2302 else 2303 force = DRM_FORCE_OFF; 2304 } 2305 2306 if (force == DRM_FORCE_OFF) { 2307 if (hdmi->bridge_is_on) 2308 dw_hdmi_poweroff(hdmi); 2309 } else { 2310 if (!hdmi->bridge_is_on) 2311 dw_hdmi_poweron(hdmi); 2312 } 2313 } 2314 2315 /* 2316 * Adjust the detection of RXSENSE according to whether we have a forced 2317 * connection mode enabled, or whether we have been disabled. There is 2318 * no point processing RXSENSE interrupts if we have a forced connection 2319 * state, or DRM has us disabled. 2320 * 2321 * We also disable rxsense interrupts when we think we're disconnected 2322 * to avoid floating TDMS signals giving false rxsense interrupts. 2323 * 2324 * Note: we still need to listen for HPD interrupts even when DRM has us 2325 * disabled so that we can detect a connect event. 2326 */ 2327 static void dw_hdmi_update_phy_mask(struct dw_hdmi *hdmi) 2328 { 2329 if (hdmi->phy.ops->update_hpd) 2330 hdmi->phy.ops->update_hpd(hdmi, hdmi->phy.data, 2331 hdmi->force, hdmi->disabled, 2332 hdmi->rxsense); 2333 } 2334 2335 static enum drm_connector_status dw_hdmi_detect(struct dw_hdmi *hdmi) 2336 { 2337 enum drm_connector_status result; 2338 2339 result = hdmi->phy.ops->read_hpd(hdmi, hdmi->phy.data); 2340 2341 mutex_lock(&hdmi->mutex); 2342 if (result != hdmi->last_connector_result) { 2343 dev_dbg(hdmi->dev, "read_hpd result: %d", result); 2344 handle_plugged_change(hdmi, 2345 result == connector_status_connected); 2346 hdmi->last_connector_result = result; 2347 } 2348 mutex_unlock(&hdmi->mutex); 2349 2350 return result; 2351 } 2352 2353 static struct edid *dw_hdmi_get_edid(struct dw_hdmi *hdmi, 2354 struct drm_connector *connector) 2355 { 2356 struct edid *edid; 2357 2358 if (!hdmi->ddc) 2359 return NULL; 2360 2361 edid = drm_get_edid(connector, hdmi->ddc); 2362 if (!edid) { 2363 dev_dbg(hdmi->dev, "failed to get edid\n"); 2364 return NULL; 2365 } 2366 2367 dev_dbg(hdmi->dev, "got edid: width[%d] x height[%d]\n", 2368 edid->width_cm, edid->height_cm); 2369 2370 hdmi->sink_is_hdmi = drm_detect_hdmi_monitor(edid); 2371 hdmi->sink_has_audio = drm_detect_monitor_audio(edid); 2372 2373 return edid; 2374 } 2375 2376 /* ----------------------------------------------------------------------------- 2377 * DRM Connector Operations 2378 */ 2379 2380 static enum drm_connector_status 2381 dw_hdmi_connector_detect(struct drm_connector *connector, bool force) 2382 { 2383 struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi, 2384 connector); 2385 return dw_hdmi_detect(hdmi); 2386 } 2387 2388 static int dw_hdmi_connector_get_modes(struct drm_connector *connector) 2389 { 2390 struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi, 2391 connector); 2392 struct edid *edid; 2393 int ret; 2394 2395 edid = dw_hdmi_get_edid(hdmi, connector); 2396 if (!edid) 2397 return 0; 2398 2399 drm_connector_update_edid_property(connector, edid); 2400 cec_notifier_set_phys_addr_from_edid(hdmi->cec_notifier, edid); 2401 ret = drm_add_edid_modes(connector, edid); 2402 kfree(edid); 2403 2404 return ret; 2405 } 2406 2407 static int dw_hdmi_connector_atomic_check(struct drm_connector *connector, 2408 struct drm_atomic_state *state) 2409 { 2410 struct drm_connector_state *old_state = 2411 drm_atomic_get_old_connector_state(state, connector); 2412 struct drm_connector_state *new_state = 2413 drm_atomic_get_new_connector_state(state, connector); 2414 struct drm_crtc *crtc = new_state->crtc; 2415 struct drm_crtc_state *crtc_state; 2416 2417 if (!crtc) 2418 return 0; 2419 2420 if (!drm_connector_atomic_hdr_metadata_equal(old_state, new_state)) { 2421 crtc_state = drm_atomic_get_crtc_state(state, crtc); 2422 if (IS_ERR(crtc_state)) 2423 return PTR_ERR(crtc_state); 2424 2425 crtc_state->mode_changed = true; 2426 } 2427 2428 return 0; 2429 } 2430 2431 static void dw_hdmi_connector_force(struct drm_connector *connector) 2432 { 2433 struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi, 2434 connector); 2435 2436 mutex_lock(&hdmi->mutex); 2437 hdmi->force = connector->force; 2438 dw_hdmi_update_power(hdmi); 2439 dw_hdmi_update_phy_mask(hdmi); 2440 mutex_unlock(&hdmi->mutex); 2441 } 2442 2443 static const struct drm_connector_funcs dw_hdmi_connector_funcs = { 2444 .fill_modes = drm_helper_probe_single_connector_modes, 2445 .detect = dw_hdmi_connector_detect, 2446 .destroy = drm_connector_cleanup, 2447 .force = dw_hdmi_connector_force, 2448 .reset = drm_atomic_helper_connector_reset, 2449 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 2450 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 2451 }; 2452 2453 static const struct drm_connector_helper_funcs dw_hdmi_connector_helper_funcs = { 2454 .get_modes = dw_hdmi_connector_get_modes, 2455 .atomic_check = dw_hdmi_connector_atomic_check, 2456 }; 2457 2458 static int dw_hdmi_connector_create(struct dw_hdmi *hdmi) 2459 { 2460 struct drm_connector *connector = &hdmi->connector; 2461 struct cec_connector_info conn_info; 2462 struct cec_notifier *notifier; 2463 2464 if (hdmi->version >= 0x200a) 2465 connector->ycbcr_420_allowed = 2466 hdmi->plat_data->ycbcr_420_allowed; 2467 else 2468 connector->ycbcr_420_allowed = false; 2469 2470 connector->interlace_allowed = 1; 2471 connector->polled = DRM_CONNECTOR_POLL_HPD; 2472 2473 drm_connector_helper_add(connector, &dw_hdmi_connector_helper_funcs); 2474 2475 drm_connector_init_with_ddc(hdmi->bridge.dev, connector, 2476 &dw_hdmi_connector_funcs, 2477 DRM_MODE_CONNECTOR_HDMIA, 2478 hdmi->ddc); 2479 2480 /* 2481 * drm_connector_attach_max_bpc_property() requires the 2482 * connector to have a state. 2483 */ 2484 drm_atomic_helper_connector_reset(connector); 2485 2486 drm_connector_attach_max_bpc_property(connector, 8, 16); 2487 2488 if (hdmi->version >= 0x200a && hdmi->plat_data->use_drm_infoframe) 2489 drm_connector_attach_hdr_output_metadata_property(connector); 2490 2491 drm_connector_attach_encoder(connector, hdmi->bridge.encoder); 2492 2493 cec_fill_conn_info_from_drm(&conn_info, connector); 2494 2495 notifier = cec_notifier_conn_register(hdmi->dev, NULL, &conn_info); 2496 if (!notifier) 2497 return -ENOMEM; 2498 2499 mutex_lock(&hdmi->cec_notifier_mutex); 2500 hdmi->cec_notifier = notifier; 2501 mutex_unlock(&hdmi->cec_notifier_mutex); 2502 2503 return 0; 2504 } 2505 2506 /* ----------------------------------------------------------------------------- 2507 * DRM Bridge Operations 2508 */ 2509 2510 /* 2511 * Possible output formats : 2512 * - MEDIA_BUS_FMT_UYYVYY16_0_5X48, 2513 * - MEDIA_BUS_FMT_UYYVYY12_0_5X36, 2514 * - MEDIA_BUS_FMT_UYYVYY10_0_5X30, 2515 * - MEDIA_BUS_FMT_UYYVYY8_0_5X24, 2516 * - MEDIA_BUS_FMT_YUV16_1X48, 2517 * - MEDIA_BUS_FMT_RGB161616_1X48, 2518 * - MEDIA_BUS_FMT_UYVY12_1X24, 2519 * - MEDIA_BUS_FMT_YUV12_1X36, 2520 * - MEDIA_BUS_FMT_RGB121212_1X36, 2521 * - MEDIA_BUS_FMT_UYVY10_1X20, 2522 * - MEDIA_BUS_FMT_YUV10_1X30, 2523 * - MEDIA_BUS_FMT_RGB101010_1X30, 2524 * - MEDIA_BUS_FMT_UYVY8_1X16, 2525 * - MEDIA_BUS_FMT_YUV8_1X24, 2526 * - MEDIA_BUS_FMT_RGB888_1X24, 2527 */ 2528 2529 /* Can return a maximum of 11 possible output formats for a mode/connector */ 2530 #define MAX_OUTPUT_SEL_FORMATS 11 2531 2532 static u32 *dw_hdmi_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge, 2533 struct drm_bridge_state *bridge_state, 2534 struct drm_crtc_state *crtc_state, 2535 struct drm_connector_state *conn_state, 2536 unsigned int *num_output_fmts) 2537 { 2538 struct drm_connector *conn = conn_state->connector; 2539 struct drm_display_info *info = &conn->display_info; 2540 struct drm_display_mode *mode = &crtc_state->mode; 2541 u8 max_bpc = conn_state->max_requested_bpc; 2542 bool is_hdmi2_sink = info->hdmi.scdc.supported || 2543 (info->color_formats & DRM_COLOR_FORMAT_YCBCR420); 2544 u32 *output_fmts; 2545 unsigned int i = 0; 2546 2547 *num_output_fmts = 0; 2548 2549 output_fmts = kcalloc(MAX_OUTPUT_SEL_FORMATS, sizeof(*output_fmts), 2550 GFP_KERNEL); 2551 if (!output_fmts) 2552 return NULL; 2553 2554 /* If dw-hdmi is the first or only bridge, avoid negociating with ourselves */ 2555 if (list_is_singular(&bridge->encoder->bridge_chain) || 2556 list_is_first(&bridge->chain_node, &bridge->encoder->bridge_chain)) { 2557 *num_output_fmts = 1; 2558 output_fmts[0] = MEDIA_BUS_FMT_FIXED; 2559 2560 return output_fmts; 2561 } 2562 2563 /* 2564 * If the current mode enforces 4:2:0, force the output but format 2565 * to 4:2:0 and do not add the YUV422/444/RGB formats 2566 */ 2567 if (conn->ycbcr_420_allowed && 2568 (drm_mode_is_420_only(info, mode) || 2569 (is_hdmi2_sink && drm_mode_is_420_also(info, mode)))) { 2570 2571 /* Order bus formats from 16bit to 8bit if supported */ 2572 if (max_bpc >= 16 && info->bpc == 16 && 2573 (info->hdmi.y420_dc_modes & DRM_EDID_YCBCR420_DC_48)) 2574 output_fmts[i++] = MEDIA_BUS_FMT_UYYVYY16_0_5X48; 2575 2576 if (max_bpc >= 12 && info->bpc >= 12 && 2577 (info->hdmi.y420_dc_modes & DRM_EDID_YCBCR420_DC_36)) 2578 output_fmts[i++] = MEDIA_BUS_FMT_UYYVYY12_0_5X36; 2579 2580 if (max_bpc >= 10 && info->bpc >= 10 && 2581 (info->hdmi.y420_dc_modes & DRM_EDID_YCBCR420_DC_30)) 2582 output_fmts[i++] = MEDIA_BUS_FMT_UYYVYY10_0_5X30; 2583 2584 /* Default 8bit fallback */ 2585 output_fmts[i++] = MEDIA_BUS_FMT_UYYVYY8_0_5X24; 2586 2587 *num_output_fmts = i; 2588 2589 return output_fmts; 2590 } 2591 2592 /* 2593 * Order bus formats from 16bit to 8bit and from YUV422 to RGB 2594 * if supported. In any case the default RGB888 format is added 2595 */ 2596 2597 if (max_bpc >= 16 && info->bpc == 16) { 2598 if (info->color_formats & DRM_COLOR_FORMAT_YCBCR444) 2599 output_fmts[i++] = MEDIA_BUS_FMT_YUV16_1X48; 2600 2601 output_fmts[i++] = MEDIA_BUS_FMT_RGB161616_1X48; 2602 } 2603 2604 if (max_bpc >= 12 && info->bpc >= 12) { 2605 if (info->color_formats & DRM_COLOR_FORMAT_YCBCR422) 2606 output_fmts[i++] = MEDIA_BUS_FMT_UYVY12_1X24; 2607 2608 if (info->color_formats & DRM_COLOR_FORMAT_YCBCR444) 2609 output_fmts[i++] = MEDIA_BUS_FMT_YUV12_1X36; 2610 2611 output_fmts[i++] = MEDIA_BUS_FMT_RGB121212_1X36; 2612 } 2613 2614 if (max_bpc >= 10 && info->bpc >= 10) { 2615 if (info->color_formats & DRM_COLOR_FORMAT_YCBCR422) 2616 output_fmts[i++] = MEDIA_BUS_FMT_UYVY10_1X20; 2617 2618 if (info->color_formats & DRM_COLOR_FORMAT_YCBCR444) 2619 output_fmts[i++] = MEDIA_BUS_FMT_YUV10_1X30; 2620 2621 output_fmts[i++] = MEDIA_BUS_FMT_RGB101010_1X30; 2622 } 2623 2624 if (info->color_formats & DRM_COLOR_FORMAT_YCBCR422) 2625 output_fmts[i++] = MEDIA_BUS_FMT_UYVY8_1X16; 2626 2627 if (info->color_formats & DRM_COLOR_FORMAT_YCBCR444) 2628 output_fmts[i++] = MEDIA_BUS_FMT_YUV8_1X24; 2629 2630 /* Default 8bit RGB fallback */ 2631 output_fmts[i++] = MEDIA_BUS_FMT_RGB888_1X24; 2632 2633 *num_output_fmts = i; 2634 2635 return output_fmts; 2636 } 2637 2638 /* 2639 * Possible input formats : 2640 * - MEDIA_BUS_FMT_RGB888_1X24 2641 * - MEDIA_BUS_FMT_YUV8_1X24 2642 * - MEDIA_BUS_FMT_UYVY8_1X16 2643 * - MEDIA_BUS_FMT_UYYVYY8_0_5X24 2644 * - MEDIA_BUS_FMT_RGB101010_1X30 2645 * - MEDIA_BUS_FMT_YUV10_1X30 2646 * - MEDIA_BUS_FMT_UYVY10_1X20 2647 * - MEDIA_BUS_FMT_UYYVYY10_0_5X30 2648 * - MEDIA_BUS_FMT_RGB121212_1X36 2649 * - MEDIA_BUS_FMT_YUV12_1X36 2650 * - MEDIA_BUS_FMT_UYVY12_1X24 2651 * - MEDIA_BUS_FMT_UYYVYY12_0_5X36 2652 * - MEDIA_BUS_FMT_RGB161616_1X48 2653 * - MEDIA_BUS_FMT_YUV16_1X48 2654 * - MEDIA_BUS_FMT_UYYVYY16_0_5X48 2655 */ 2656 2657 /* Can return a maximum of 3 possible input formats for an output format */ 2658 #define MAX_INPUT_SEL_FORMATS 3 2659 2660 static u32 *dw_hdmi_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge, 2661 struct drm_bridge_state *bridge_state, 2662 struct drm_crtc_state *crtc_state, 2663 struct drm_connector_state *conn_state, 2664 u32 output_fmt, 2665 unsigned int *num_input_fmts) 2666 { 2667 u32 *input_fmts; 2668 unsigned int i = 0; 2669 2670 *num_input_fmts = 0; 2671 2672 input_fmts = kcalloc(MAX_INPUT_SEL_FORMATS, sizeof(*input_fmts), 2673 GFP_KERNEL); 2674 if (!input_fmts) 2675 return NULL; 2676 2677 switch (output_fmt) { 2678 /* If MEDIA_BUS_FMT_FIXED is tested, return default bus format */ 2679 case MEDIA_BUS_FMT_FIXED: 2680 input_fmts[i++] = MEDIA_BUS_FMT_RGB888_1X24; 2681 break; 2682 /* 8bit */ 2683 case MEDIA_BUS_FMT_RGB888_1X24: 2684 input_fmts[i++] = MEDIA_BUS_FMT_RGB888_1X24; 2685 input_fmts[i++] = MEDIA_BUS_FMT_YUV8_1X24; 2686 input_fmts[i++] = MEDIA_BUS_FMT_UYVY8_1X16; 2687 break; 2688 case MEDIA_BUS_FMT_YUV8_1X24: 2689 input_fmts[i++] = MEDIA_BUS_FMT_YUV8_1X24; 2690 input_fmts[i++] = MEDIA_BUS_FMT_UYVY8_1X16; 2691 input_fmts[i++] = MEDIA_BUS_FMT_RGB888_1X24; 2692 break; 2693 case MEDIA_BUS_FMT_UYVY8_1X16: 2694 input_fmts[i++] = MEDIA_BUS_FMT_UYVY8_1X16; 2695 input_fmts[i++] = MEDIA_BUS_FMT_YUV8_1X24; 2696 input_fmts[i++] = MEDIA_BUS_FMT_RGB888_1X24; 2697 break; 2698 2699 /* 10bit */ 2700 case MEDIA_BUS_FMT_RGB101010_1X30: 2701 input_fmts[i++] = MEDIA_BUS_FMT_RGB101010_1X30; 2702 input_fmts[i++] = MEDIA_BUS_FMT_YUV10_1X30; 2703 input_fmts[i++] = MEDIA_BUS_FMT_UYVY10_1X20; 2704 break; 2705 case MEDIA_BUS_FMT_YUV10_1X30: 2706 input_fmts[i++] = MEDIA_BUS_FMT_YUV10_1X30; 2707 input_fmts[i++] = MEDIA_BUS_FMT_UYVY10_1X20; 2708 input_fmts[i++] = MEDIA_BUS_FMT_RGB101010_1X30; 2709 break; 2710 case MEDIA_BUS_FMT_UYVY10_1X20: 2711 input_fmts[i++] = MEDIA_BUS_FMT_UYVY10_1X20; 2712 input_fmts[i++] = MEDIA_BUS_FMT_YUV10_1X30; 2713 input_fmts[i++] = MEDIA_BUS_FMT_RGB101010_1X30; 2714 break; 2715 2716 /* 12bit */ 2717 case MEDIA_BUS_FMT_RGB121212_1X36: 2718 input_fmts[i++] = MEDIA_BUS_FMT_RGB121212_1X36; 2719 input_fmts[i++] = MEDIA_BUS_FMT_YUV12_1X36; 2720 input_fmts[i++] = MEDIA_BUS_FMT_UYVY12_1X24; 2721 break; 2722 case MEDIA_BUS_FMT_YUV12_1X36: 2723 input_fmts[i++] = MEDIA_BUS_FMT_YUV12_1X36; 2724 input_fmts[i++] = MEDIA_BUS_FMT_UYVY12_1X24; 2725 input_fmts[i++] = MEDIA_BUS_FMT_RGB121212_1X36; 2726 break; 2727 case MEDIA_BUS_FMT_UYVY12_1X24: 2728 input_fmts[i++] = MEDIA_BUS_FMT_UYVY12_1X24; 2729 input_fmts[i++] = MEDIA_BUS_FMT_YUV12_1X36; 2730 input_fmts[i++] = MEDIA_BUS_FMT_RGB121212_1X36; 2731 break; 2732 2733 /* 16bit */ 2734 case MEDIA_BUS_FMT_RGB161616_1X48: 2735 input_fmts[i++] = MEDIA_BUS_FMT_RGB161616_1X48; 2736 input_fmts[i++] = MEDIA_BUS_FMT_YUV16_1X48; 2737 break; 2738 case MEDIA_BUS_FMT_YUV16_1X48: 2739 input_fmts[i++] = MEDIA_BUS_FMT_YUV16_1X48; 2740 input_fmts[i++] = MEDIA_BUS_FMT_RGB161616_1X48; 2741 break; 2742 2743 /*YUV 4:2:0 */ 2744 case MEDIA_BUS_FMT_UYYVYY8_0_5X24: 2745 case MEDIA_BUS_FMT_UYYVYY10_0_5X30: 2746 case MEDIA_BUS_FMT_UYYVYY12_0_5X36: 2747 case MEDIA_BUS_FMT_UYYVYY16_0_5X48: 2748 input_fmts[i++] = output_fmt; 2749 break; 2750 } 2751 2752 *num_input_fmts = i; 2753 2754 if (*num_input_fmts == 0) { 2755 kfree(input_fmts); 2756 input_fmts = NULL; 2757 } 2758 2759 return input_fmts; 2760 } 2761 2762 static int dw_hdmi_bridge_atomic_check(struct drm_bridge *bridge, 2763 struct drm_bridge_state *bridge_state, 2764 struct drm_crtc_state *crtc_state, 2765 struct drm_connector_state *conn_state) 2766 { 2767 struct dw_hdmi *hdmi = bridge->driver_private; 2768 2769 hdmi->hdmi_data.enc_out_bus_format = 2770 bridge_state->output_bus_cfg.format; 2771 2772 hdmi->hdmi_data.enc_in_bus_format = 2773 bridge_state->input_bus_cfg.format; 2774 2775 dev_dbg(hdmi->dev, "input format 0x%04x, output format 0x%04x\n", 2776 bridge_state->input_bus_cfg.format, 2777 bridge_state->output_bus_cfg.format); 2778 2779 return 0; 2780 } 2781 2782 static int dw_hdmi_bridge_attach(struct drm_bridge *bridge, 2783 enum drm_bridge_attach_flags flags) 2784 { 2785 struct dw_hdmi *hdmi = bridge->driver_private; 2786 2787 if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR) 2788 return drm_bridge_attach(bridge->encoder, hdmi->next_bridge, 2789 bridge, flags); 2790 2791 return dw_hdmi_connector_create(hdmi); 2792 } 2793 2794 static void dw_hdmi_bridge_detach(struct drm_bridge *bridge) 2795 { 2796 struct dw_hdmi *hdmi = bridge->driver_private; 2797 2798 mutex_lock(&hdmi->cec_notifier_mutex); 2799 cec_notifier_conn_unregister(hdmi->cec_notifier); 2800 hdmi->cec_notifier = NULL; 2801 mutex_unlock(&hdmi->cec_notifier_mutex); 2802 } 2803 2804 static enum drm_mode_status 2805 dw_hdmi_bridge_mode_valid(struct drm_bridge *bridge, 2806 const struct drm_display_info *info, 2807 const struct drm_display_mode *mode) 2808 { 2809 struct dw_hdmi *hdmi = bridge->driver_private; 2810 const struct dw_hdmi_plat_data *pdata = hdmi->plat_data; 2811 enum drm_mode_status mode_status = MODE_OK; 2812 2813 /* We don't support double-clocked modes */ 2814 if (mode->flags & DRM_MODE_FLAG_DBLCLK) 2815 return MODE_BAD; 2816 2817 if (pdata->mode_valid) 2818 mode_status = pdata->mode_valid(hdmi, pdata->priv_data, info, 2819 mode); 2820 2821 return mode_status; 2822 } 2823 2824 static void dw_hdmi_bridge_mode_set(struct drm_bridge *bridge, 2825 const struct drm_display_mode *orig_mode, 2826 const struct drm_display_mode *mode) 2827 { 2828 struct dw_hdmi *hdmi = bridge->driver_private; 2829 2830 mutex_lock(&hdmi->mutex); 2831 2832 /* Store the display mode for plugin/DKMS poweron events */ 2833 memcpy(&hdmi->previous_mode, mode, sizeof(hdmi->previous_mode)); 2834 2835 mutex_unlock(&hdmi->mutex); 2836 } 2837 2838 static void dw_hdmi_bridge_atomic_disable(struct drm_bridge *bridge, 2839 struct drm_bridge_state *old_state) 2840 { 2841 struct dw_hdmi *hdmi = bridge->driver_private; 2842 2843 mutex_lock(&hdmi->mutex); 2844 hdmi->disabled = true; 2845 hdmi->curr_conn = NULL; 2846 dw_hdmi_update_power(hdmi); 2847 dw_hdmi_update_phy_mask(hdmi); 2848 mutex_unlock(&hdmi->mutex); 2849 } 2850 2851 static void dw_hdmi_bridge_atomic_enable(struct drm_bridge *bridge, 2852 struct drm_bridge_state *old_state) 2853 { 2854 struct dw_hdmi *hdmi = bridge->driver_private; 2855 struct drm_atomic_state *state = old_state->base.state; 2856 struct drm_connector *connector; 2857 2858 connector = drm_atomic_get_new_connector_for_encoder(state, 2859 bridge->encoder); 2860 2861 mutex_lock(&hdmi->mutex); 2862 hdmi->disabled = false; 2863 hdmi->curr_conn = connector; 2864 dw_hdmi_update_power(hdmi); 2865 dw_hdmi_update_phy_mask(hdmi); 2866 mutex_unlock(&hdmi->mutex); 2867 } 2868 2869 static enum drm_connector_status dw_hdmi_bridge_detect(struct drm_bridge *bridge) 2870 { 2871 struct dw_hdmi *hdmi = bridge->driver_private; 2872 2873 return dw_hdmi_detect(hdmi); 2874 } 2875 2876 static struct edid *dw_hdmi_bridge_get_edid(struct drm_bridge *bridge, 2877 struct drm_connector *connector) 2878 { 2879 struct dw_hdmi *hdmi = bridge->driver_private; 2880 2881 return dw_hdmi_get_edid(hdmi, connector); 2882 } 2883 2884 static const struct drm_bridge_funcs dw_hdmi_bridge_funcs = { 2885 .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, 2886 .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, 2887 .atomic_reset = drm_atomic_helper_bridge_reset, 2888 .attach = dw_hdmi_bridge_attach, 2889 .detach = dw_hdmi_bridge_detach, 2890 .atomic_check = dw_hdmi_bridge_atomic_check, 2891 .atomic_get_output_bus_fmts = dw_hdmi_bridge_atomic_get_output_bus_fmts, 2892 .atomic_get_input_bus_fmts = dw_hdmi_bridge_atomic_get_input_bus_fmts, 2893 .atomic_enable = dw_hdmi_bridge_atomic_enable, 2894 .atomic_disable = dw_hdmi_bridge_atomic_disable, 2895 .mode_set = dw_hdmi_bridge_mode_set, 2896 .mode_valid = dw_hdmi_bridge_mode_valid, 2897 .detect = dw_hdmi_bridge_detect, 2898 .get_edid = dw_hdmi_bridge_get_edid, 2899 }; 2900 2901 /* ----------------------------------------------------------------------------- 2902 * IRQ Handling 2903 */ 2904 2905 static irqreturn_t dw_hdmi_i2c_irq(struct dw_hdmi *hdmi) 2906 { 2907 struct dw_hdmi_i2c *i2c = hdmi->i2c; 2908 unsigned int stat; 2909 2910 stat = hdmi_readb(hdmi, HDMI_IH_I2CM_STAT0); 2911 if (!stat) 2912 return IRQ_NONE; 2913 2914 hdmi_writeb(hdmi, stat, HDMI_IH_I2CM_STAT0); 2915 2916 i2c->stat = stat; 2917 2918 complete(&i2c->cmp); 2919 2920 return IRQ_HANDLED; 2921 } 2922 2923 static irqreturn_t dw_hdmi_hardirq(int irq, void *dev_id) 2924 { 2925 struct dw_hdmi *hdmi = dev_id; 2926 u8 intr_stat; 2927 irqreturn_t ret = IRQ_NONE; 2928 2929 if (hdmi->i2c) 2930 ret = dw_hdmi_i2c_irq(hdmi); 2931 2932 intr_stat = hdmi_readb(hdmi, HDMI_IH_PHY_STAT0); 2933 if (intr_stat) { 2934 hdmi_writeb(hdmi, ~0, HDMI_IH_MUTE_PHY_STAT0); 2935 return IRQ_WAKE_THREAD; 2936 } 2937 2938 return ret; 2939 } 2940 2941 void dw_hdmi_setup_rx_sense(struct dw_hdmi *hdmi, bool hpd, bool rx_sense) 2942 { 2943 mutex_lock(&hdmi->mutex); 2944 2945 if (!hdmi->force) { 2946 /* 2947 * If the RX sense status indicates we're disconnected, 2948 * clear the software rxsense status. 2949 */ 2950 if (!rx_sense) 2951 hdmi->rxsense = false; 2952 2953 /* 2954 * Only set the software rxsense status when both 2955 * rxsense and hpd indicates we're connected. 2956 * This avoids what seems to be bad behaviour in 2957 * at least iMX6S versions of the phy. 2958 */ 2959 if (hpd) 2960 hdmi->rxsense = true; 2961 2962 dw_hdmi_update_power(hdmi); 2963 dw_hdmi_update_phy_mask(hdmi); 2964 } 2965 mutex_unlock(&hdmi->mutex); 2966 } 2967 EXPORT_SYMBOL_GPL(dw_hdmi_setup_rx_sense); 2968 2969 static irqreturn_t dw_hdmi_irq(int irq, void *dev_id) 2970 { 2971 struct dw_hdmi *hdmi = dev_id; 2972 u8 intr_stat, phy_int_pol, phy_pol_mask, phy_stat; 2973 2974 intr_stat = hdmi_readb(hdmi, HDMI_IH_PHY_STAT0); 2975 phy_int_pol = hdmi_readb(hdmi, HDMI_PHY_POL0); 2976 phy_stat = hdmi_readb(hdmi, HDMI_PHY_STAT0); 2977 2978 phy_pol_mask = 0; 2979 if (intr_stat & HDMI_IH_PHY_STAT0_HPD) 2980 phy_pol_mask |= HDMI_PHY_HPD; 2981 if (intr_stat & HDMI_IH_PHY_STAT0_RX_SENSE0) 2982 phy_pol_mask |= HDMI_PHY_RX_SENSE0; 2983 if (intr_stat & HDMI_IH_PHY_STAT0_RX_SENSE1) 2984 phy_pol_mask |= HDMI_PHY_RX_SENSE1; 2985 if (intr_stat & HDMI_IH_PHY_STAT0_RX_SENSE2) 2986 phy_pol_mask |= HDMI_PHY_RX_SENSE2; 2987 if (intr_stat & HDMI_IH_PHY_STAT0_RX_SENSE3) 2988 phy_pol_mask |= HDMI_PHY_RX_SENSE3; 2989 2990 if (phy_pol_mask) 2991 hdmi_modb(hdmi, ~phy_int_pol, phy_pol_mask, HDMI_PHY_POL0); 2992 2993 /* 2994 * RX sense tells us whether the TDMS transmitters are detecting 2995 * load - in other words, there's something listening on the 2996 * other end of the link. Use this to decide whether we should 2997 * power on the phy as HPD may be toggled by the sink to merely 2998 * ask the source to re-read the EDID. 2999 */ 3000 if (intr_stat & 3001 (HDMI_IH_PHY_STAT0_RX_SENSE | HDMI_IH_PHY_STAT0_HPD)) { 3002 dw_hdmi_setup_rx_sense(hdmi, 3003 phy_stat & HDMI_PHY_HPD, 3004 phy_stat & HDMI_PHY_RX_SENSE); 3005 3006 if ((phy_stat & (HDMI_PHY_RX_SENSE | HDMI_PHY_HPD)) == 0) { 3007 mutex_lock(&hdmi->cec_notifier_mutex); 3008 cec_notifier_phys_addr_invalidate(hdmi->cec_notifier); 3009 mutex_unlock(&hdmi->cec_notifier_mutex); 3010 } 3011 } 3012 3013 if (intr_stat & HDMI_IH_PHY_STAT0_HPD) { 3014 enum drm_connector_status status = phy_int_pol & HDMI_PHY_HPD 3015 ? connector_status_connected 3016 : connector_status_disconnected; 3017 3018 dev_dbg(hdmi->dev, "EVENT=%s\n", 3019 status == connector_status_connected ? 3020 "plugin" : "plugout"); 3021 3022 if (hdmi->bridge.dev) { 3023 drm_helper_hpd_irq_event(hdmi->bridge.dev); 3024 drm_bridge_hpd_notify(&hdmi->bridge, status); 3025 } 3026 } 3027 3028 hdmi_writeb(hdmi, intr_stat, HDMI_IH_PHY_STAT0); 3029 hdmi_writeb(hdmi, ~(HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE), 3030 HDMI_IH_MUTE_PHY_STAT0); 3031 3032 return IRQ_HANDLED; 3033 } 3034 3035 static const struct dw_hdmi_phy_data dw_hdmi_phys[] = { 3036 { 3037 .type = DW_HDMI_PHY_DWC_HDMI_TX_PHY, 3038 .name = "DWC HDMI TX PHY", 3039 .gen = 1, 3040 }, { 3041 .type = DW_HDMI_PHY_DWC_MHL_PHY_HEAC, 3042 .name = "DWC MHL PHY + HEAC PHY", 3043 .gen = 2, 3044 .has_svsret = true, 3045 .configure = hdmi_phy_configure_dwc_hdmi_3d_tx, 3046 }, { 3047 .type = DW_HDMI_PHY_DWC_MHL_PHY, 3048 .name = "DWC MHL PHY", 3049 .gen = 2, 3050 .has_svsret = true, 3051 .configure = hdmi_phy_configure_dwc_hdmi_3d_tx, 3052 }, { 3053 .type = DW_HDMI_PHY_DWC_HDMI_3D_TX_PHY_HEAC, 3054 .name = "DWC HDMI 3D TX PHY + HEAC PHY", 3055 .gen = 2, 3056 .configure = hdmi_phy_configure_dwc_hdmi_3d_tx, 3057 }, { 3058 .type = DW_HDMI_PHY_DWC_HDMI_3D_TX_PHY, 3059 .name = "DWC HDMI 3D TX PHY", 3060 .gen = 2, 3061 .configure = hdmi_phy_configure_dwc_hdmi_3d_tx, 3062 }, { 3063 .type = DW_HDMI_PHY_DWC_HDMI20_TX_PHY, 3064 .name = "DWC HDMI 2.0 TX PHY", 3065 .gen = 2, 3066 .has_svsret = true, 3067 .configure = hdmi_phy_configure_dwc_hdmi_3d_tx, 3068 }, { 3069 .type = DW_HDMI_PHY_VENDOR_PHY, 3070 .name = "Vendor PHY", 3071 } 3072 }; 3073 3074 static int dw_hdmi_detect_phy(struct dw_hdmi *hdmi) 3075 { 3076 unsigned int i; 3077 u8 phy_type; 3078 3079 phy_type = hdmi->plat_data->phy_force_vendor ? 3080 DW_HDMI_PHY_VENDOR_PHY : 3081 hdmi_readb(hdmi, HDMI_CONFIG2_ID); 3082 3083 if (phy_type == DW_HDMI_PHY_VENDOR_PHY) { 3084 /* Vendor PHYs require support from the glue layer. */ 3085 if (!hdmi->plat_data->phy_ops || !hdmi->plat_data->phy_name) { 3086 dev_err(hdmi->dev, 3087 "Vendor HDMI PHY not supported by glue layer\n"); 3088 return -ENODEV; 3089 } 3090 3091 hdmi->phy.ops = hdmi->plat_data->phy_ops; 3092 hdmi->phy.data = hdmi->plat_data->phy_data; 3093 hdmi->phy.name = hdmi->plat_data->phy_name; 3094 return 0; 3095 } 3096 3097 /* Synopsys PHYs are handled internally. */ 3098 for (i = 0; i < ARRAY_SIZE(dw_hdmi_phys); ++i) { 3099 if (dw_hdmi_phys[i].type == phy_type) { 3100 hdmi->phy.ops = &dw_hdmi_synopsys_phy_ops; 3101 hdmi->phy.name = dw_hdmi_phys[i].name; 3102 hdmi->phy.data = (void *)&dw_hdmi_phys[i]; 3103 3104 if (!dw_hdmi_phys[i].configure && 3105 !hdmi->plat_data->configure_phy) { 3106 dev_err(hdmi->dev, "%s requires platform support\n", 3107 hdmi->phy.name); 3108 return -ENODEV; 3109 } 3110 3111 return 0; 3112 } 3113 } 3114 3115 dev_err(hdmi->dev, "Unsupported HDMI PHY type (%02x)\n", phy_type); 3116 return -ENODEV; 3117 } 3118 3119 static void dw_hdmi_cec_enable(struct dw_hdmi *hdmi) 3120 { 3121 mutex_lock(&hdmi->mutex); 3122 hdmi->mc_clkdis &= ~HDMI_MC_CLKDIS_CECCLK_DISABLE; 3123 hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS); 3124 mutex_unlock(&hdmi->mutex); 3125 } 3126 3127 static void dw_hdmi_cec_disable(struct dw_hdmi *hdmi) 3128 { 3129 mutex_lock(&hdmi->mutex); 3130 hdmi->mc_clkdis |= HDMI_MC_CLKDIS_CECCLK_DISABLE; 3131 hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS); 3132 mutex_unlock(&hdmi->mutex); 3133 } 3134 3135 static const struct dw_hdmi_cec_ops dw_hdmi_cec_ops = { 3136 .write = hdmi_writeb, 3137 .read = hdmi_readb, 3138 .enable = dw_hdmi_cec_enable, 3139 .disable = dw_hdmi_cec_disable, 3140 }; 3141 3142 static const struct regmap_config hdmi_regmap_8bit_config = { 3143 .reg_bits = 32, 3144 .val_bits = 8, 3145 .reg_stride = 1, 3146 .max_register = HDMI_I2CM_FS_SCL_LCNT_0_ADDR, 3147 }; 3148 3149 static const struct regmap_config hdmi_regmap_32bit_config = { 3150 .reg_bits = 32, 3151 .val_bits = 32, 3152 .reg_stride = 4, 3153 .max_register = HDMI_I2CM_FS_SCL_LCNT_0_ADDR << 2, 3154 }; 3155 3156 static void dw_hdmi_init_hw(struct dw_hdmi *hdmi) 3157 { 3158 initialize_hdmi_ih_mutes(hdmi); 3159 3160 /* 3161 * Reset HDMI DDC I2C master controller and mute I2CM interrupts. 3162 * Even if we are using a separate i2c adapter doing this doesn't 3163 * hurt. 3164 */ 3165 dw_hdmi_i2c_init(hdmi); 3166 3167 if (hdmi->phy.ops->setup_hpd) 3168 hdmi->phy.ops->setup_hpd(hdmi, hdmi->phy.data); 3169 } 3170 3171 /* ----------------------------------------------------------------------------- 3172 * Probe/remove API, used from platforms based on the DRM bridge API. 3173 */ 3174 3175 static int dw_hdmi_parse_dt(struct dw_hdmi *hdmi) 3176 { 3177 struct device_node *endpoint; 3178 struct device_node *remote; 3179 3180 if (!hdmi->plat_data->output_port) 3181 return 0; 3182 3183 endpoint = of_graph_get_endpoint_by_regs(hdmi->dev->of_node, 3184 hdmi->plat_data->output_port, 3185 -1); 3186 if (!endpoint) { 3187 /* 3188 * On platforms whose bindings don't make the output port 3189 * mandatory (such as Rockchip) the plat_data->output_port 3190 * field isn't set, so it's safe to make this a fatal error. 3191 */ 3192 dev_err(hdmi->dev, "Missing endpoint in port@%u\n", 3193 hdmi->plat_data->output_port); 3194 return -ENODEV; 3195 } 3196 3197 remote = of_graph_get_remote_port_parent(endpoint); 3198 of_node_put(endpoint); 3199 if (!remote) { 3200 dev_err(hdmi->dev, "Endpoint in port@%u unconnected\n", 3201 hdmi->plat_data->output_port); 3202 return -ENODEV; 3203 } 3204 3205 if (!of_device_is_available(remote)) { 3206 dev_err(hdmi->dev, "port@%u remote device is disabled\n", 3207 hdmi->plat_data->output_port); 3208 of_node_put(remote); 3209 return -ENODEV; 3210 } 3211 3212 hdmi->next_bridge = of_drm_find_bridge(remote); 3213 of_node_put(remote); 3214 if (!hdmi->next_bridge) 3215 return -EPROBE_DEFER; 3216 3217 return 0; 3218 } 3219 3220 struct dw_hdmi *dw_hdmi_probe(struct platform_device *pdev, 3221 const struct dw_hdmi_plat_data *plat_data) 3222 { 3223 struct device *dev = &pdev->dev; 3224 struct device_node *np = dev->of_node; 3225 struct platform_device_info pdevinfo; 3226 struct device_node *ddc_node; 3227 struct dw_hdmi_cec_data cec; 3228 struct dw_hdmi *hdmi; 3229 struct resource *iores = NULL; 3230 int irq; 3231 int ret; 3232 u32 val = 1; 3233 u8 prod_id0; 3234 u8 prod_id1; 3235 u8 config0; 3236 u8 config3; 3237 3238 hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL); 3239 if (!hdmi) 3240 return ERR_PTR(-ENOMEM); 3241 3242 hdmi->plat_data = plat_data; 3243 hdmi->dev = dev; 3244 hdmi->sample_rate = 48000; 3245 hdmi->disabled = true; 3246 hdmi->rxsense = true; 3247 hdmi->phy_mask = (u8)~(HDMI_PHY_HPD | HDMI_PHY_RX_SENSE); 3248 hdmi->mc_clkdis = 0x7f; 3249 hdmi->last_connector_result = connector_status_disconnected; 3250 3251 mutex_init(&hdmi->mutex); 3252 mutex_init(&hdmi->audio_mutex); 3253 mutex_init(&hdmi->cec_notifier_mutex); 3254 spin_lock_init(&hdmi->audio_lock); 3255 3256 ret = dw_hdmi_parse_dt(hdmi); 3257 if (ret < 0) 3258 return ERR_PTR(ret); 3259 3260 ddc_node = of_parse_phandle(np, "ddc-i2c-bus", 0); 3261 if (ddc_node) { 3262 hdmi->ddc = of_get_i2c_adapter_by_node(ddc_node); 3263 of_node_put(ddc_node); 3264 if (!hdmi->ddc) { 3265 dev_dbg(hdmi->dev, "failed to read ddc node\n"); 3266 return ERR_PTR(-EPROBE_DEFER); 3267 } 3268 3269 } else { 3270 dev_dbg(hdmi->dev, "no ddc property found\n"); 3271 } 3272 3273 if (!plat_data->regm) { 3274 const struct regmap_config *reg_config; 3275 3276 of_property_read_u32(np, "reg-io-width", &val); 3277 switch (val) { 3278 case 4: 3279 reg_config = &hdmi_regmap_32bit_config; 3280 hdmi->reg_shift = 2; 3281 break; 3282 case 1: 3283 reg_config = &hdmi_regmap_8bit_config; 3284 break; 3285 default: 3286 dev_err(dev, "reg-io-width must be 1 or 4\n"); 3287 return ERR_PTR(-EINVAL); 3288 } 3289 3290 iores = platform_get_resource(pdev, IORESOURCE_MEM, 0); 3291 hdmi->regs = devm_ioremap_resource(dev, iores); 3292 if (IS_ERR(hdmi->regs)) { 3293 ret = PTR_ERR(hdmi->regs); 3294 goto err_res; 3295 } 3296 3297 hdmi->regm = devm_regmap_init_mmio(dev, hdmi->regs, reg_config); 3298 if (IS_ERR(hdmi->regm)) { 3299 dev_err(dev, "Failed to configure regmap\n"); 3300 ret = PTR_ERR(hdmi->regm); 3301 goto err_res; 3302 } 3303 } else { 3304 hdmi->regm = plat_data->regm; 3305 } 3306 3307 hdmi->isfr_clk = devm_clk_get(hdmi->dev, "isfr"); 3308 if (IS_ERR(hdmi->isfr_clk)) { 3309 ret = PTR_ERR(hdmi->isfr_clk); 3310 dev_err(hdmi->dev, "Unable to get HDMI isfr clk: %d\n", ret); 3311 goto err_res; 3312 } 3313 3314 ret = clk_prepare_enable(hdmi->isfr_clk); 3315 if (ret) { 3316 dev_err(hdmi->dev, "Cannot enable HDMI isfr clock: %d\n", ret); 3317 goto err_res; 3318 } 3319 3320 hdmi->iahb_clk = devm_clk_get(hdmi->dev, "iahb"); 3321 if (IS_ERR(hdmi->iahb_clk)) { 3322 ret = PTR_ERR(hdmi->iahb_clk); 3323 dev_err(hdmi->dev, "Unable to get HDMI iahb clk: %d\n", ret); 3324 goto err_isfr; 3325 } 3326 3327 ret = clk_prepare_enable(hdmi->iahb_clk); 3328 if (ret) { 3329 dev_err(hdmi->dev, "Cannot enable HDMI iahb clock: %d\n", ret); 3330 goto err_isfr; 3331 } 3332 3333 hdmi->cec_clk = devm_clk_get(hdmi->dev, "cec"); 3334 if (PTR_ERR(hdmi->cec_clk) == -ENOENT) { 3335 hdmi->cec_clk = NULL; 3336 } else if (IS_ERR(hdmi->cec_clk)) { 3337 ret = PTR_ERR(hdmi->cec_clk); 3338 if (ret != -EPROBE_DEFER) 3339 dev_err(hdmi->dev, "Cannot get HDMI cec clock: %d\n", 3340 ret); 3341 3342 hdmi->cec_clk = NULL; 3343 goto err_iahb; 3344 } else { 3345 ret = clk_prepare_enable(hdmi->cec_clk); 3346 if (ret) { 3347 dev_err(hdmi->dev, "Cannot enable HDMI cec clock: %d\n", 3348 ret); 3349 goto err_iahb; 3350 } 3351 } 3352 3353 /* Product and revision IDs */ 3354 hdmi->version = (hdmi_readb(hdmi, HDMI_DESIGN_ID) << 8) 3355 | (hdmi_readb(hdmi, HDMI_REVISION_ID) << 0); 3356 prod_id0 = hdmi_readb(hdmi, HDMI_PRODUCT_ID0); 3357 prod_id1 = hdmi_readb(hdmi, HDMI_PRODUCT_ID1); 3358 3359 if (prod_id0 != HDMI_PRODUCT_ID0_HDMI_TX || 3360 (prod_id1 & ~HDMI_PRODUCT_ID1_HDCP) != HDMI_PRODUCT_ID1_HDMI_TX) { 3361 dev_err(dev, "Unsupported HDMI controller (%04x:%02x:%02x)\n", 3362 hdmi->version, prod_id0, prod_id1); 3363 ret = -ENODEV; 3364 goto err_iahb; 3365 } 3366 3367 ret = dw_hdmi_detect_phy(hdmi); 3368 if (ret < 0) 3369 goto err_iahb; 3370 3371 dev_info(dev, "Detected HDMI TX controller v%x.%03x %s HDCP (%s)\n", 3372 hdmi->version >> 12, hdmi->version & 0xfff, 3373 prod_id1 & HDMI_PRODUCT_ID1_HDCP ? "with" : "without", 3374 hdmi->phy.name); 3375 3376 dw_hdmi_init_hw(hdmi); 3377 3378 irq = platform_get_irq(pdev, 0); 3379 if (irq < 0) { 3380 ret = irq; 3381 goto err_iahb; 3382 } 3383 3384 ret = devm_request_threaded_irq(dev, irq, dw_hdmi_hardirq, 3385 dw_hdmi_irq, IRQF_SHARED, 3386 dev_name(dev), hdmi); 3387 if (ret) 3388 goto err_iahb; 3389 3390 /* 3391 * To prevent overflows in HDMI_IH_FC_STAT2, set the clk regenerator 3392 * N and cts values before enabling phy 3393 */ 3394 hdmi_init_clk_regenerator(hdmi); 3395 3396 /* If DDC bus is not specified, try to register HDMI I2C bus */ 3397 if (!hdmi->ddc) { 3398 /* Look for (optional) stuff related to unwedging */ 3399 hdmi->pinctrl = devm_pinctrl_get(dev); 3400 if (!IS_ERR(hdmi->pinctrl)) { 3401 hdmi->unwedge_state = 3402 pinctrl_lookup_state(hdmi->pinctrl, "unwedge"); 3403 hdmi->default_state = 3404 pinctrl_lookup_state(hdmi->pinctrl, "default"); 3405 3406 if (IS_ERR(hdmi->default_state) || 3407 IS_ERR(hdmi->unwedge_state)) { 3408 if (!IS_ERR(hdmi->unwedge_state)) 3409 dev_warn(dev, 3410 "Unwedge requires default pinctrl\n"); 3411 hdmi->default_state = NULL; 3412 hdmi->unwedge_state = NULL; 3413 } 3414 } 3415 3416 hdmi->ddc = dw_hdmi_i2c_adapter(hdmi); 3417 if (IS_ERR(hdmi->ddc)) 3418 hdmi->ddc = NULL; 3419 } 3420 3421 hdmi->bridge.driver_private = hdmi; 3422 hdmi->bridge.funcs = &dw_hdmi_bridge_funcs; 3423 hdmi->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID 3424 | DRM_BRIDGE_OP_HPD; 3425 hdmi->bridge.interlace_allowed = true; 3426 #ifdef CONFIG_OF 3427 hdmi->bridge.of_node = pdev->dev.of_node; 3428 #endif 3429 3430 memset(&pdevinfo, 0, sizeof(pdevinfo)); 3431 pdevinfo.parent = dev; 3432 pdevinfo.id = PLATFORM_DEVID_AUTO; 3433 3434 config0 = hdmi_readb(hdmi, HDMI_CONFIG0_ID); 3435 config3 = hdmi_readb(hdmi, HDMI_CONFIG3_ID); 3436 3437 if (iores && config3 & HDMI_CONFIG3_AHBAUDDMA) { 3438 struct dw_hdmi_audio_data audio; 3439 3440 audio.phys = iores->start; 3441 audio.base = hdmi->regs; 3442 audio.irq = irq; 3443 audio.hdmi = hdmi; 3444 audio.get_eld = hdmi_audio_get_eld; 3445 hdmi->enable_audio = dw_hdmi_ahb_audio_enable; 3446 hdmi->disable_audio = dw_hdmi_ahb_audio_disable; 3447 3448 pdevinfo.name = "dw-hdmi-ahb-audio"; 3449 pdevinfo.data = &audio; 3450 pdevinfo.size_data = sizeof(audio); 3451 pdevinfo.dma_mask = DMA_BIT_MASK(32); 3452 hdmi->audio = platform_device_register_full(&pdevinfo); 3453 } else if (config0 & HDMI_CONFIG0_I2S) { 3454 struct dw_hdmi_i2s_audio_data audio; 3455 3456 audio.hdmi = hdmi; 3457 audio.get_eld = hdmi_audio_get_eld; 3458 audio.write = hdmi_writeb; 3459 audio.read = hdmi_readb; 3460 hdmi->enable_audio = dw_hdmi_i2s_audio_enable; 3461 hdmi->disable_audio = dw_hdmi_i2s_audio_disable; 3462 3463 pdevinfo.name = "dw-hdmi-i2s-audio"; 3464 pdevinfo.data = &audio; 3465 pdevinfo.size_data = sizeof(audio); 3466 pdevinfo.dma_mask = DMA_BIT_MASK(32); 3467 hdmi->audio = platform_device_register_full(&pdevinfo); 3468 } 3469 3470 if (!plat_data->disable_cec && (config0 & HDMI_CONFIG0_CEC)) { 3471 cec.hdmi = hdmi; 3472 cec.ops = &dw_hdmi_cec_ops; 3473 cec.irq = irq; 3474 3475 pdevinfo.name = "dw-hdmi-cec"; 3476 pdevinfo.data = &cec; 3477 pdevinfo.size_data = sizeof(cec); 3478 pdevinfo.dma_mask = 0; 3479 3480 hdmi->cec = platform_device_register_full(&pdevinfo); 3481 } 3482 3483 drm_bridge_add(&hdmi->bridge); 3484 3485 return hdmi; 3486 3487 err_iahb: 3488 clk_disable_unprepare(hdmi->iahb_clk); 3489 clk_disable_unprepare(hdmi->cec_clk); 3490 err_isfr: 3491 clk_disable_unprepare(hdmi->isfr_clk); 3492 err_res: 3493 i2c_put_adapter(hdmi->ddc); 3494 3495 return ERR_PTR(ret); 3496 } 3497 EXPORT_SYMBOL_GPL(dw_hdmi_probe); 3498 3499 void dw_hdmi_remove(struct dw_hdmi *hdmi) 3500 { 3501 drm_bridge_remove(&hdmi->bridge); 3502 3503 if (hdmi->audio && !IS_ERR(hdmi->audio)) 3504 platform_device_unregister(hdmi->audio); 3505 if (!IS_ERR(hdmi->cec)) 3506 platform_device_unregister(hdmi->cec); 3507 3508 /* Disable all interrupts */ 3509 hdmi_writeb(hdmi, ~0, HDMI_IH_MUTE_PHY_STAT0); 3510 3511 clk_disable_unprepare(hdmi->iahb_clk); 3512 clk_disable_unprepare(hdmi->isfr_clk); 3513 clk_disable_unprepare(hdmi->cec_clk); 3514 3515 if (hdmi->i2c) 3516 i2c_del_adapter(&hdmi->i2c->adap); 3517 else 3518 i2c_put_adapter(hdmi->ddc); 3519 } 3520 EXPORT_SYMBOL_GPL(dw_hdmi_remove); 3521 3522 /* ----------------------------------------------------------------------------- 3523 * Bind/unbind API, used from platforms based on the component framework. 3524 */ 3525 struct dw_hdmi *dw_hdmi_bind(struct platform_device *pdev, 3526 struct drm_encoder *encoder, 3527 const struct dw_hdmi_plat_data *plat_data) 3528 { 3529 struct dw_hdmi *hdmi; 3530 int ret; 3531 3532 hdmi = dw_hdmi_probe(pdev, plat_data); 3533 if (IS_ERR(hdmi)) 3534 return hdmi; 3535 3536 ret = drm_bridge_attach(encoder, &hdmi->bridge, NULL, 0); 3537 if (ret) { 3538 dw_hdmi_remove(hdmi); 3539 return ERR_PTR(ret); 3540 } 3541 3542 return hdmi; 3543 } 3544 EXPORT_SYMBOL_GPL(dw_hdmi_bind); 3545 3546 void dw_hdmi_unbind(struct dw_hdmi *hdmi) 3547 { 3548 dw_hdmi_remove(hdmi); 3549 } 3550 EXPORT_SYMBOL_GPL(dw_hdmi_unbind); 3551 3552 void dw_hdmi_resume(struct dw_hdmi *hdmi) 3553 { 3554 dw_hdmi_init_hw(hdmi); 3555 } 3556 EXPORT_SYMBOL_GPL(dw_hdmi_resume); 3557 3558 MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>"); 3559 MODULE_AUTHOR("Andy Yan <andy.yan@rock-chips.com>"); 3560 MODULE_AUTHOR("Yakir Yang <ykk@rock-chips.com>"); 3561 MODULE_AUTHOR("Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>"); 3562 MODULE_DESCRIPTION("DW HDMI transmitter driver"); 3563 MODULE_LICENSE("GPL"); 3564 MODULE_ALIAS("platform:dw-hdmi"); 3565