1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) STMicroelectronics SA 2014 4 * Author: Vincent Abriou <vincent.abriou@st.com> for STMicroelectronics. 5 */ 6 7 #include <linux/clk.h> 8 #include <linux/component.h> 9 #include <linux/debugfs.h> 10 #include <linux/hdmi.h> 11 #include <linux/i2c.h> 12 #include <linux/module.h> 13 #include <linux/io.h> 14 #include <linux/platform_device.h> 15 #include <linux/reset.h> 16 17 #include <drm/drm_atomic_helper.h> 18 #include <drm/drm_bridge.h> 19 #include <drm/drm_debugfs.h> 20 #include <drm/drm_drv.h> 21 #include <drm/drm_edid.h> 22 #include <drm/drm_file.h> 23 #include <drm/drm_print.h> 24 #include <drm/drm_probe_helper.h> 25 26 #include <sound/hdmi-codec.h> 27 28 #include "sti_hdmi.h" 29 #include "sti_hdmi_tx3g4c28phy.h" 30 #include "sti_vtg.h" 31 32 #define HDMI_CFG 0x0000 33 #define HDMI_INT_EN 0x0004 34 #define HDMI_INT_STA 0x0008 35 #define HDMI_INT_CLR 0x000C 36 #define HDMI_STA 0x0010 37 #define HDMI_ACTIVE_VID_XMIN 0x0100 38 #define HDMI_ACTIVE_VID_XMAX 0x0104 39 #define HDMI_ACTIVE_VID_YMIN 0x0108 40 #define HDMI_ACTIVE_VID_YMAX 0x010C 41 #define HDMI_DFLT_CHL0_DAT 0x0110 42 #define HDMI_DFLT_CHL1_DAT 0x0114 43 #define HDMI_DFLT_CHL2_DAT 0x0118 44 #define HDMI_AUDIO_CFG 0x0200 45 #define HDMI_SPDIF_FIFO_STATUS 0x0204 46 #define HDMI_SW_DI_1_HEAD_WORD 0x0210 47 #define HDMI_SW_DI_1_PKT_WORD0 0x0214 48 #define HDMI_SW_DI_1_PKT_WORD1 0x0218 49 #define HDMI_SW_DI_1_PKT_WORD2 0x021C 50 #define HDMI_SW_DI_1_PKT_WORD3 0x0220 51 #define HDMI_SW_DI_1_PKT_WORD4 0x0224 52 #define HDMI_SW_DI_1_PKT_WORD5 0x0228 53 #define HDMI_SW_DI_1_PKT_WORD6 0x022C 54 #define HDMI_SW_DI_CFG 0x0230 55 #define HDMI_SAMPLE_FLAT_MASK 0x0244 56 #define HDMI_AUDN 0x0400 57 #define HDMI_AUD_CTS 0x0404 58 #define HDMI_SW_DI_2_HEAD_WORD 0x0600 59 #define HDMI_SW_DI_2_PKT_WORD0 0x0604 60 #define HDMI_SW_DI_2_PKT_WORD1 0x0608 61 #define HDMI_SW_DI_2_PKT_WORD2 0x060C 62 #define HDMI_SW_DI_2_PKT_WORD3 0x0610 63 #define HDMI_SW_DI_2_PKT_WORD4 0x0614 64 #define HDMI_SW_DI_2_PKT_WORD5 0x0618 65 #define HDMI_SW_DI_2_PKT_WORD6 0x061C 66 #define HDMI_SW_DI_3_HEAD_WORD 0x0620 67 #define HDMI_SW_DI_3_PKT_WORD0 0x0624 68 #define HDMI_SW_DI_3_PKT_WORD1 0x0628 69 #define HDMI_SW_DI_3_PKT_WORD2 0x062C 70 #define HDMI_SW_DI_3_PKT_WORD3 0x0630 71 #define HDMI_SW_DI_3_PKT_WORD4 0x0634 72 #define HDMI_SW_DI_3_PKT_WORD5 0x0638 73 #define HDMI_SW_DI_3_PKT_WORD6 0x063C 74 75 #define HDMI_IFRAME_SLOT_AVI 1 76 #define HDMI_IFRAME_SLOT_AUDIO 2 77 #define HDMI_IFRAME_SLOT_VENDOR 3 78 79 #define XCAT(prefix, x, suffix) prefix ## x ## suffix 80 #define HDMI_SW_DI_N_HEAD_WORD(x) XCAT(HDMI_SW_DI_, x, _HEAD_WORD) 81 #define HDMI_SW_DI_N_PKT_WORD0(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD0) 82 #define HDMI_SW_DI_N_PKT_WORD1(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD1) 83 #define HDMI_SW_DI_N_PKT_WORD2(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD2) 84 #define HDMI_SW_DI_N_PKT_WORD3(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD3) 85 #define HDMI_SW_DI_N_PKT_WORD4(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD4) 86 #define HDMI_SW_DI_N_PKT_WORD5(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD5) 87 #define HDMI_SW_DI_N_PKT_WORD6(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD6) 88 89 #define HDMI_SW_DI_MAX_WORD 7 90 91 #define HDMI_IFRAME_DISABLED 0x0 92 #define HDMI_IFRAME_SINGLE_SHOT 0x1 93 #define HDMI_IFRAME_FIELD 0x2 94 #define HDMI_IFRAME_FRAME 0x3 95 #define HDMI_IFRAME_MASK 0x3 96 #define HDMI_IFRAME_CFG_DI_N(x, n) ((x) << ((n-1)*4)) /* n from 1 to 6 */ 97 98 #define HDMI_CFG_DEVICE_EN BIT(0) 99 #define HDMI_CFG_HDMI_NOT_DVI BIT(1) 100 #define HDMI_CFG_HDCP_EN BIT(2) 101 #define HDMI_CFG_ESS_NOT_OESS BIT(3) 102 #define HDMI_CFG_H_SYNC_POL_NEG BIT(4) 103 #define HDMI_CFG_V_SYNC_POL_NEG BIT(6) 104 #define HDMI_CFG_422_EN BIT(8) 105 #define HDMI_CFG_FIFO_OVERRUN_CLR BIT(12) 106 #define HDMI_CFG_FIFO_UNDERRUN_CLR BIT(13) 107 #define HDMI_CFG_SW_RST_EN BIT(31) 108 109 #define HDMI_INT_GLOBAL BIT(0) 110 #define HDMI_INT_SW_RST BIT(1) 111 #define HDMI_INT_PIX_CAP BIT(3) 112 #define HDMI_INT_HOT_PLUG BIT(4) 113 #define HDMI_INT_DLL_LCK BIT(5) 114 #define HDMI_INT_NEW_FRAME BIT(6) 115 #define HDMI_INT_GENCTRL_PKT BIT(7) 116 #define HDMI_INT_AUDIO_FIFO_XRUN BIT(8) 117 #define HDMI_INT_SINK_TERM_PRESENT BIT(11) 118 119 #define HDMI_DEFAULT_INT (HDMI_INT_SINK_TERM_PRESENT \ 120 | HDMI_INT_DLL_LCK \ 121 | HDMI_INT_HOT_PLUG \ 122 | HDMI_INT_GLOBAL) 123 124 #define HDMI_WORKING_INT (HDMI_INT_SINK_TERM_PRESENT \ 125 | HDMI_INT_AUDIO_FIFO_XRUN \ 126 | HDMI_INT_GENCTRL_PKT \ 127 | HDMI_INT_NEW_FRAME \ 128 | HDMI_INT_DLL_LCK \ 129 | HDMI_INT_HOT_PLUG \ 130 | HDMI_INT_PIX_CAP \ 131 | HDMI_INT_SW_RST \ 132 | HDMI_INT_GLOBAL) 133 134 #define HDMI_STA_SW_RST BIT(1) 135 136 #define HDMI_AUD_CFG_8CH BIT(0) 137 #define HDMI_AUD_CFG_SPDIF_DIV_2 BIT(1) 138 #define HDMI_AUD_CFG_SPDIF_DIV_3 BIT(2) 139 #define HDMI_AUD_CFG_SPDIF_CLK_DIV_4 (BIT(1) | BIT(2)) 140 #define HDMI_AUD_CFG_CTS_CLK_256FS BIT(12) 141 #define HDMI_AUD_CFG_DTS_INVALID BIT(16) 142 #define HDMI_AUD_CFG_ONE_BIT_INVALID (BIT(18) | BIT(19) | BIT(20) | BIT(21)) 143 #define HDMI_AUD_CFG_CH12_VALID BIT(28) 144 #define HDMI_AUD_CFG_CH34_VALID BIT(29) 145 #define HDMI_AUD_CFG_CH56_VALID BIT(30) 146 #define HDMI_AUD_CFG_CH78_VALID BIT(31) 147 148 /* sample flat mask */ 149 #define HDMI_SAMPLE_FLAT_NO 0 150 #define HDMI_SAMPLE_FLAT_SP0 BIT(0) 151 #define HDMI_SAMPLE_FLAT_SP1 BIT(1) 152 #define HDMI_SAMPLE_FLAT_SP2 BIT(2) 153 #define HDMI_SAMPLE_FLAT_SP3 BIT(3) 154 #define HDMI_SAMPLE_FLAT_ALL (HDMI_SAMPLE_FLAT_SP0 | HDMI_SAMPLE_FLAT_SP1 |\ 155 HDMI_SAMPLE_FLAT_SP2 | HDMI_SAMPLE_FLAT_SP3) 156 157 #define HDMI_INFOFRAME_HEADER_TYPE(x) (((x) & 0xff) << 0) 158 #define HDMI_INFOFRAME_HEADER_VERSION(x) (((x) & 0xff) << 8) 159 #define HDMI_INFOFRAME_HEADER_LEN(x) (((x) & 0x0f) << 16) 160 161 struct sti_hdmi_connector { 162 struct drm_connector drm_connector; 163 struct drm_encoder *encoder; 164 struct sti_hdmi *hdmi; 165 struct drm_property *colorspace_property; 166 }; 167 168 #define to_sti_hdmi_connector(x) \ 169 container_of(x, struct sti_hdmi_connector, drm_connector) 170 171 static const struct drm_prop_enum_list colorspace_mode_names[] = { 172 { HDMI_COLORSPACE_RGB, "rgb" }, 173 { HDMI_COLORSPACE_YUV422, "yuv422" }, 174 { HDMI_COLORSPACE_YUV444, "yuv444" }, 175 }; 176 177 u32 hdmi_read(struct sti_hdmi *hdmi, int offset) 178 { 179 return readl(hdmi->regs + offset); 180 } 181 182 void hdmi_write(struct sti_hdmi *hdmi, u32 val, int offset) 183 { 184 writel(val, hdmi->regs + offset); 185 } 186 187 /* 188 * HDMI interrupt handler threaded 189 * 190 * @irq: irq number 191 * @arg: connector structure 192 */ 193 static irqreturn_t hdmi_irq_thread(int irq, void *arg) 194 { 195 struct sti_hdmi *hdmi = arg; 196 197 /* Hot plug/unplug IRQ */ 198 if (hdmi->irq_status & HDMI_INT_HOT_PLUG) { 199 hdmi->hpd = readl(hdmi->regs + HDMI_STA) & HDMI_STA_HOT_PLUG; 200 if (hdmi->drm_dev) 201 drm_helper_hpd_irq_event(hdmi->drm_dev); 202 } 203 204 /* Sw reset and PLL lock are exclusive so we can use the same 205 * event to signal them 206 */ 207 if (hdmi->irq_status & (HDMI_INT_SW_RST | HDMI_INT_DLL_LCK)) { 208 hdmi->event_received = true; 209 wake_up_interruptible(&hdmi->wait_event); 210 } 211 212 /* Audio FIFO underrun IRQ */ 213 if (hdmi->irq_status & HDMI_INT_AUDIO_FIFO_XRUN) 214 DRM_INFO("Warning: audio FIFO underrun occurs!\n"); 215 216 return IRQ_HANDLED; 217 } 218 219 /* 220 * HDMI interrupt handler 221 * 222 * @irq: irq number 223 * @arg: connector structure 224 */ 225 static irqreturn_t hdmi_irq(int irq, void *arg) 226 { 227 struct sti_hdmi *hdmi = arg; 228 229 /* read interrupt status */ 230 hdmi->irq_status = hdmi_read(hdmi, HDMI_INT_STA); 231 232 /* clear interrupt status */ 233 hdmi_write(hdmi, hdmi->irq_status, HDMI_INT_CLR); 234 235 /* force sync bus write */ 236 hdmi_read(hdmi, HDMI_INT_STA); 237 238 return IRQ_WAKE_THREAD; 239 } 240 241 /* 242 * Set hdmi active area depending on the drm display mode selected 243 * 244 * @hdmi: pointer on the hdmi internal structure 245 */ 246 static void hdmi_active_area(struct sti_hdmi *hdmi) 247 { 248 u32 xmin, xmax; 249 u32 ymin, ymax; 250 251 xmin = sti_vtg_get_pixel_number(hdmi->mode, 1); 252 xmax = sti_vtg_get_pixel_number(hdmi->mode, hdmi->mode.hdisplay); 253 ymin = sti_vtg_get_line_number(hdmi->mode, 0); 254 ymax = sti_vtg_get_line_number(hdmi->mode, hdmi->mode.vdisplay - 1); 255 256 hdmi_write(hdmi, xmin, HDMI_ACTIVE_VID_XMIN); 257 hdmi_write(hdmi, xmax, HDMI_ACTIVE_VID_XMAX); 258 hdmi_write(hdmi, ymin, HDMI_ACTIVE_VID_YMIN); 259 hdmi_write(hdmi, ymax, HDMI_ACTIVE_VID_YMAX); 260 } 261 262 /* 263 * Overall hdmi configuration 264 * 265 * @hdmi: pointer on the hdmi internal structure 266 */ 267 static void hdmi_config(struct sti_hdmi *hdmi) 268 { 269 u32 conf; 270 271 DRM_DEBUG_DRIVER("\n"); 272 273 /* Clear overrun and underrun fifo */ 274 conf = HDMI_CFG_FIFO_OVERRUN_CLR | HDMI_CFG_FIFO_UNDERRUN_CLR; 275 276 /* Select encryption type and the framing mode */ 277 conf |= HDMI_CFG_ESS_NOT_OESS; 278 if (hdmi->hdmi_monitor) 279 conf |= HDMI_CFG_HDMI_NOT_DVI; 280 281 /* Set Hsync polarity */ 282 if (hdmi->mode.flags & DRM_MODE_FLAG_NHSYNC) { 283 DRM_DEBUG_DRIVER("H Sync Negative\n"); 284 conf |= HDMI_CFG_H_SYNC_POL_NEG; 285 } 286 287 /* Set Vsync polarity */ 288 if (hdmi->mode.flags & DRM_MODE_FLAG_NVSYNC) { 289 DRM_DEBUG_DRIVER("V Sync Negative\n"); 290 conf |= HDMI_CFG_V_SYNC_POL_NEG; 291 } 292 293 /* Enable HDMI */ 294 conf |= HDMI_CFG_DEVICE_EN; 295 296 hdmi_write(hdmi, conf, HDMI_CFG); 297 } 298 299 /* 300 * Helper to reset info frame 301 * 302 * @hdmi: pointer on the hdmi internal structure 303 * @slot: infoframe to reset 304 */ 305 static void hdmi_infoframe_reset(struct sti_hdmi *hdmi, 306 u32 slot) 307 { 308 u32 val, i; 309 u32 head_offset, pack_offset; 310 311 switch (slot) { 312 case HDMI_IFRAME_SLOT_AVI: 313 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AVI); 314 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AVI); 315 break; 316 case HDMI_IFRAME_SLOT_AUDIO: 317 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AUDIO); 318 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AUDIO); 319 break; 320 case HDMI_IFRAME_SLOT_VENDOR: 321 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_VENDOR); 322 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_VENDOR); 323 break; 324 default: 325 DRM_ERROR("unsupported infoframe slot: %#x\n", slot); 326 return; 327 } 328 329 /* Disable transmission for the selected slot */ 330 val = hdmi_read(hdmi, HDMI_SW_DI_CFG); 331 val &= ~HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, slot); 332 hdmi_write(hdmi, val, HDMI_SW_DI_CFG); 333 334 /* Reset info frame registers */ 335 hdmi_write(hdmi, 0x0, head_offset); 336 for (i = 0; i < HDMI_SW_DI_MAX_WORD; i += sizeof(u32)) 337 hdmi_write(hdmi, 0x0, pack_offset + i); 338 } 339 340 /* 341 * Helper to concatenate infoframe in 32 bits word 342 * 343 * @ptr: pointer on the hdmi internal structure 344 * @size: size to write 345 */ 346 static inline unsigned int hdmi_infoframe_subpack(const u8 *ptr, size_t size) 347 { 348 unsigned long value = 0; 349 size_t i; 350 351 for (i = size; i > 0; i--) 352 value = (value << 8) | ptr[i - 1]; 353 354 return value; 355 } 356 357 /* 358 * Helper to write info frame 359 * 360 * @hdmi: pointer on the hdmi internal structure 361 * @data: infoframe to write 362 * @size: size to write 363 */ 364 static void hdmi_infoframe_write_infopack(struct sti_hdmi *hdmi, 365 const u8 *data, 366 size_t size) 367 { 368 const u8 *ptr = data; 369 u32 val, slot, mode, i; 370 u32 head_offset, pack_offset; 371 372 switch (*ptr) { 373 case HDMI_INFOFRAME_TYPE_AVI: 374 slot = HDMI_IFRAME_SLOT_AVI; 375 mode = HDMI_IFRAME_FIELD; 376 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AVI); 377 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AVI); 378 break; 379 case HDMI_INFOFRAME_TYPE_AUDIO: 380 slot = HDMI_IFRAME_SLOT_AUDIO; 381 mode = HDMI_IFRAME_FRAME; 382 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AUDIO); 383 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AUDIO); 384 break; 385 case HDMI_INFOFRAME_TYPE_VENDOR: 386 slot = HDMI_IFRAME_SLOT_VENDOR; 387 mode = HDMI_IFRAME_FRAME; 388 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_VENDOR); 389 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_VENDOR); 390 break; 391 default: 392 DRM_ERROR("unsupported infoframe type: %#x\n", *ptr); 393 return; 394 } 395 396 /* Disable transmission slot for updated infoframe */ 397 val = hdmi_read(hdmi, HDMI_SW_DI_CFG); 398 val &= ~HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, slot); 399 hdmi_write(hdmi, val, HDMI_SW_DI_CFG); 400 401 val = HDMI_INFOFRAME_HEADER_TYPE(*ptr++); 402 val |= HDMI_INFOFRAME_HEADER_VERSION(*ptr++); 403 val |= HDMI_INFOFRAME_HEADER_LEN(*ptr++); 404 writel(val, hdmi->regs + head_offset); 405 406 /* 407 * Each subpack contains 4 bytes 408 * The First Bytes of the first subpacket must contain the checksum 409 * Packet size is increase by one. 410 */ 411 size = size - HDMI_INFOFRAME_HEADER_SIZE + 1; 412 for (i = 0; i < size; i += sizeof(u32)) { 413 size_t num; 414 415 num = min_t(size_t, size - i, sizeof(u32)); 416 val = hdmi_infoframe_subpack(ptr, num); 417 ptr += sizeof(u32); 418 writel(val, hdmi->regs + pack_offset + i); 419 } 420 421 /* Enable transmission slot for updated infoframe */ 422 val = hdmi_read(hdmi, HDMI_SW_DI_CFG); 423 val |= HDMI_IFRAME_CFG_DI_N(mode, slot); 424 hdmi_write(hdmi, val, HDMI_SW_DI_CFG); 425 } 426 427 /* 428 * Prepare and configure the AVI infoframe 429 * 430 * AVI infoframe are transmitted at least once per two video field and 431 * contains information about HDMI transmission mode such as color space, 432 * colorimetry, ... 433 * 434 * @hdmi: pointer on the hdmi internal structure 435 * 436 * Return negative value if error occurs 437 */ 438 static int hdmi_avi_infoframe_config(struct sti_hdmi *hdmi) 439 { 440 struct drm_display_mode *mode = &hdmi->mode; 441 struct hdmi_avi_infoframe infoframe; 442 u8 buffer[HDMI_INFOFRAME_SIZE(AVI)]; 443 int ret; 444 445 DRM_DEBUG_DRIVER("\n"); 446 447 ret = drm_hdmi_avi_infoframe_from_display_mode(&infoframe, 448 hdmi->drm_connector, mode); 449 if (ret < 0) { 450 DRM_ERROR("failed to setup AVI infoframe: %d\n", ret); 451 return ret; 452 } 453 454 /* fixed infoframe configuration not linked to the mode */ 455 infoframe.colorspace = hdmi->colorspace; 456 infoframe.quantization_range = HDMI_QUANTIZATION_RANGE_DEFAULT; 457 infoframe.colorimetry = HDMI_COLORIMETRY_NONE; 458 459 ret = hdmi_avi_infoframe_pack(&infoframe, buffer, sizeof(buffer)); 460 if (ret < 0) { 461 DRM_ERROR("failed to pack AVI infoframe: %d\n", ret); 462 return ret; 463 } 464 465 hdmi_infoframe_write_infopack(hdmi, buffer, ret); 466 467 return 0; 468 } 469 470 /* 471 * Prepare and configure the AUDIO infoframe 472 * 473 * AUDIO infoframe are transmitted once per frame and 474 * contains information about HDMI transmission mode such as audio codec, 475 * sample size, ... 476 * 477 * @hdmi: pointer on the hdmi internal structure 478 * 479 * Return negative value if error occurs 480 */ 481 static int hdmi_audio_infoframe_config(struct sti_hdmi *hdmi) 482 { 483 struct hdmi_audio_params *audio = &hdmi->audio; 484 u8 buffer[HDMI_INFOFRAME_SIZE(AUDIO)]; 485 int ret, val; 486 487 DRM_DEBUG_DRIVER("enter %s, AIF %s\n", __func__, 488 audio->enabled ? "enable" : "disable"); 489 if (audio->enabled) { 490 /* set audio parameters stored*/ 491 ret = hdmi_audio_infoframe_pack(&audio->cea, buffer, 492 sizeof(buffer)); 493 if (ret < 0) { 494 DRM_ERROR("failed to pack audio infoframe: %d\n", ret); 495 return ret; 496 } 497 hdmi_infoframe_write_infopack(hdmi, buffer, ret); 498 } else { 499 /*disable audio info frame transmission */ 500 val = hdmi_read(hdmi, HDMI_SW_DI_CFG); 501 val &= ~HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 502 HDMI_IFRAME_SLOT_AUDIO); 503 hdmi_write(hdmi, val, HDMI_SW_DI_CFG); 504 } 505 506 return 0; 507 } 508 509 /* 510 * Prepare and configure the VS infoframe 511 * 512 * Vendor Specific infoframe are transmitted once per frame and 513 * contains vendor specific information. 514 * 515 * @hdmi: pointer on the hdmi internal structure 516 * 517 * Return negative value if error occurs 518 */ 519 #define HDMI_VENDOR_INFOFRAME_MAX_SIZE 6 520 static int hdmi_vendor_infoframe_config(struct sti_hdmi *hdmi) 521 { 522 struct drm_display_mode *mode = &hdmi->mode; 523 struct hdmi_vendor_infoframe infoframe; 524 u8 buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_VENDOR_INFOFRAME_MAX_SIZE]; 525 int ret; 526 527 DRM_DEBUG_DRIVER("\n"); 528 529 ret = drm_hdmi_vendor_infoframe_from_display_mode(&infoframe, 530 hdmi->drm_connector, 531 mode); 532 if (ret < 0) { 533 /* 534 * Going into that statement does not means vendor infoframe 535 * fails. It just informed us that vendor infoframe is not 536 * needed for the selected mode. Only 4k or stereoscopic 3D 537 * mode requires vendor infoframe. So just simply return 0. 538 */ 539 return 0; 540 } 541 542 ret = hdmi_vendor_infoframe_pack(&infoframe, buffer, sizeof(buffer)); 543 if (ret < 0) { 544 DRM_ERROR("failed to pack VS infoframe: %d\n", ret); 545 return ret; 546 } 547 548 hdmi_infoframe_write_infopack(hdmi, buffer, ret); 549 550 return 0; 551 } 552 553 #define HDMI_TIMEOUT_SWRESET 100 /*milliseconds */ 554 555 /* 556 * Software reset of the hdmi subsystem 557 * 558 * @hdmi: pointer on the hdmi internal structure 559 * 560 */ 561 static void hdmi_swreset(struct sti_hdmi *hdmi) 562 { 563 u32 val; 564 565 DRM_DEBUG_DRIVER("\n"); 566 567 /* Enable hdmi_audio clock only during hdmi reset */ 568 if (clk_prepare_enable(hdmi->clk_audio)) 569 DRM_INFO("Failed to prepare/enable hdmi_audio clk\n"); 570 571 /* Sw reset */ 572 hdmi->event_received = false; 573 574 val = hdmi_read(hdmi, HDMI_CFG); 575 val |= HDMI_CFG_SW_RST_EN; 576 hdmi_write(hdmi, val, HDMI_CFG); 577 578 /* Wait reset completed */ 579 wait_event_interruptible_timeout(hdmi->wait_event, 580 hdmi->event_received, 581 msecs_to_jiffies 582 (HDMI_TIMEOUT_SWRESET)); 583 584 /* 585 * HDMI_STA_SW_RST bit is set to '1' when SW_RST bit in HDMI_CFG is 586 * set to '1' and clk_audio is running. 587 */ 588 if ((hdmi_read(hdmi, HDMI_STA) & HDMI_STA_SW_RST) == 0) 589 DRM_DEBUG_DRIVER("Warning: HDMI sw reset timeout occurs\n"); 590 591 val = hdmi_read(hdmi, HDMI_CFG); 592 val &= ~HDMI_CFG_SW_RST_EN; 593 hdmi_write(hdmi, val, HDMI_CFG); 594 595 /* Disable hdmi_audio clock. Not used anymore for drm purpose */ 596 clk_disable_unprepare(hdmi->clk_audio); 597 } 598 599 #define DBGFS_PRINT_STR(str1, str2) seq_printf(s, "%-24s %s\n", str1, str2) 600 #define DBGFS_PRINT_INT(str1, int2) seq_printf(s, "%-24s %d\n", str1, int2) 601 #define DBGFS_DUMP(str, reg) seq_printf(s, "%s %-25s 0x%08X", str, #reg, \ 602 hdmi_read(hdmi, reg)) 603 #define DBGFS_DUMP_DI(reg, slot) DBGFS_DUMP("\n", reg(slot)) 604 605 static void hdmi_dbg_cfg(struct seq_file *s, int val) 606 { 607 int tmp; 608 609 seq_putc(s, '\t'); 610 tmp = val & HDMI_CFG_HDMI_NOT_DVI; 611 DBGFS_PRINT_STR("mode:", tmp ? "HDMI" : "DVI"); 612 seq_puts(s, "\t\t\t\t\t"); 613 tmp = val & HDMI_CFG_HDCP_EN; 614 DBGFS_PRINT_STR("HDCP:", tmp ? "enable" : "disable"); 615 seq_puts(s, "\t\t\t\t\t"); 616 tmp = val & HDMI_CFG_ESS_NOT_OESS; 617 DBGFS_PRINT_STR("HDCP mode:", tmp ? "ESS enable" : "OESS enable"); 618 seq_puts(s, "\t\t\t\t\t"); 619 tmp = val & HDMI_CFG_H_SYNC_POL_NEG; 620 DBGFS_PRINT_STR("Hsync polarity:", tmp ? "inverted" : "normal"); 621 seq_puts(s, "\t\t\t\t\t"); 622 tmp = val & HDMI_CFG_V_SYNC_POL_NEG; 623 DBGFS_PRINT_STR("Vsync polarity:", tmp ? "inverted" : "normal"); 624 seq_puts(s, "\t\t\t\t\t"); 625 tmp = val & HDMI_CFG_422_EN; 626 DBGFS_PRINT_STR("YUV422 format:", tmp ? "enable" : "disable"); 627 } 628 629 static void hdmi_dbg_sta(struct seq_file *s, int val) 630 { 631 int tmp; 632 633 seq_putc(s, '\t'); 634 tmp = (val & HDMI_STA_DLL_LCK); 635 DBGFS_PRINT_STR("pll:", tmp ? "locked" : "not locked"); 636 seq_puts(s, "\t\t\t\t\t"); 637 tmp = (val & HDMI_STA_HOT_PLUG); 638 DBGFS_PRINT_STR("hdmi cable:", tmp ? "connected" : "not connected"); 639 } 640 641 static void hdmi_dbg_sw_di_cfg(struct seq_file *s, int val) 642 { 643 int tmp; 644 char *const en_di[] = {"no transmission", 645 "single transmission", 646 "once every field", 647 "once every frame"}; 648 649 seq_putc(s, '\t'); 650 tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 1)); 651 DBGFS_PRINT_STR("Data island 1:", en_di[tmp]); 652 seq_puts(s, "\t\t\t\t\t"); 653 tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 2)) >> 4; 654 DBGFS_PRINT_STR("Data island 2:", en_di[tmp]); 655 seq_puts(s, "\t\t\t\t\t"); 656 tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 3)) >> 8; 657 DBGFS_PRINT_STR("Data island 3:", en_di[tmp]); 658 seq_puts(s, "\t\t\t\t\t"); 659 tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 4)) >> 12; 660 DBGFS_PRINT_STR("Data island 4:", en_di[tmp]); 661 seq_puts(s, "\t\t\t\t\t"); 662 tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 5)) >> 16; 663 DBGFS_PRINT_STR("Data island 5:", en_di[tmp]); 664 seq_puts(s, "\t\t\t\t\t"); 665 tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 6)) >> 20; 666 DBGFS_PRINT_STR("Data island 6:", en_di[tmp]); 667 } 668 669 static int hdmi_dbg_show(struct seq_file *s, void *data) 670 { 671 struct drm_info_node *node = s->private; 672 struct sti_hdmi *hdmi = (struct sti_hdmi *)node->info_ent->data; 673 674 seq_printf(s, "HDMI: (vaddr = 0x%p)", hdmi->regs); 675 DBGFS_DUMP("\n", HDMI_CFG); 676 hdmi_dbg_cfg(s, hdmi_read(hdmi, HDMI_CFG)); 677 DBGFS_DUMP("", HDMI_INT_EN); 678 DBGFS_DUMP("\n", HDMI_STA); 679 hdmi_dbg_sta(s, hdmi_read(hdmi, HDMI_STA)); 680 DBGFS_DUMP("", HDMI_ACTIVE_VID_XMIN); 681 seq_putc(s, '\t'); 682 DBGFS_PRINT_INT("Xmin:", hdmi_read(hdmi, HDMI_ACTIVE_VID_XMIN)); 683 DBGFS_DUMP("", HDMI_ACTIVE_VID_XMAX); 684 seq_putc(s, '\t'); 685 DBGFS_PRINT_INT("Xmax:", hdmi_read(hdmi, HDMI_ACTIVE_VID_XMAX)); 686 DBGFS_DUMP("", HDMI_ACTIVE_VID_YMIN); 687 seq_putc(s, '\t'); 688 DBGFS_PRINT_INT("Ymin:", hdmi_read(hdmi, HDMI_ACTIVE_VID_YMIN)); 689 DBGFS_DUMP("", HDMI_ACTIVE_VID_YMAX); 690 seq_putc(s, '\t'); 691 DBGFS_PRINT_INT("Ymax:", hdmi_read(hdmi, HDMI_ACTIVE_VID_YMAX)); 692 DBGFS_DUMP("", HDMI_SW_DI_CFG); 693 hdmi_dbg_sw_di_cfg(s, hdmi_read(hdmi, HDMI_SW_DI_CFG)); 694 695 DBGFS_DUMP("\n", HDMI_AUDIO_CFG); 696 DBGFS_DUMP("\n", HDMI_SPDIF_FIFO_STATUS); 697 DBGFS_DUMP("\n", HDMI_AUDN); 698 699 seq_printf(s, "\n AVI Infoframe (Data Island slot N=%d):", 700 HDMI_IFRAME_SLOT_AVI); 701 DBGFS_DUMP_DI(HDMI_SW_DI_N_HEAD_WORD, HDMI_IFRAME_SLOT_AVI); 702 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD0, HDMI_IFRAME_SLOT_AVI); 703 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD1, HDMI_IFRAME_SLOT_AVI); 704 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD2, HDMI_IFRAME_SLOT_AVI); 705 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD3, HDMI_IFRAME_SLOT_AVI); 706 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD4, HDMI_IFRAME_SLOT_AVI); 707 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD5, HDMI_IFRAME_SLOT_AVI); 708 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD6, HDMI_IFRAME_SLOT_AVI); 709 seq_printf(s, "\n\n AUDIO Infoframe (Data Island slot N=%d):", 710 HDMI_IFRAME_SLOT_AUDIO); 711 DBGFS_DUMP_DI(HDMI_SW_DI_N_HEAD_WORD, HDMI_IFRAME_SLOT_AUDIO); 712 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD0, HDMI_IFRAME_SLOT_AUDIO); 713 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD1, HDMI_IFRAME_SLOT_AUDIO); 714 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD2, HDMI_IFRAME_SLOT_AUDIO); 715 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD3, HDMI_IFRAME_SLOT_AUDIO); 716 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD4, HDMI_IFRAME_SLOT_AUDIO); 717 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD5, HDMI_IFRAME_SLOT_AUDIO); 718 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD6, HDMI_IFRAME_SLOT_AUDIO); 719 seq_printf(s, "\n\n VENDOR SPECIFIC Infoframe (Data Island slot N=%d):", 720 HDMI_IFRAME_SLOT_VENDOR); 721 DBGFS_DUMP_DI(HDMI_SW_DI_N_HEAD_WORD, HDMI_IFRAME_SLOT_VENDOR); 722 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD0, HDMI_IFRAME_SLOT_VENDOR); 723 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD1, HDMI_IFRAME_SLOT_VENDOR); 724 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD2, HDMI_IFRAME_SLOT_VENDOR); 725 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD3, HDMI_IFRAME_SLOT_VENDOR); 726 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD4, HDMI_IFRAME_SLOT_VENDOR); 727 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD5, HDMI_IFRAME_SLOT_VENDOR); 728 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD6, HDMI_IFRAME_SLOT_VENDOR); 729 seq_putc(s, '\n'); 730 return 0; 731 } 732 733 static struct drm_info_list hdmi_debugfs_files[] = { 734 { "hdmi", hdmi_dbg_show, 0, NULL }, 735 }; 736 737 static void hdmi_debugfs_init(struct sti_hdmi *hdmi, struct drm_minor *minor) 738 { 739 unsigned int i; 740 741 for (i = 0; i < ARRAY_SIZE(hdmi_debugfs_files); i++) 742 hdmi_debugfs_files[i].data = hdmi; 743 744 drm_debugfs_create_files(hdmi_debugfs_files, 745 ARRAY_SIZE(hdmi_debugfs_files), 746 minor->debugfs_root, minor); 747 } 748 749 static void sti_hdmi_disable(struct drm_bridge *bridge) 750 { 751 struct sti_hdmi *hdmi = bridge->driver_private; 752 753 u32 val = hdmi_read(hdmi, HDMI_CFG); 754 755 if (!hdmi->enabled) 756 return; 757 758 DRM_DEBUG_DRIVER("\n"); 759 760 /* Disable HDMI */ 761 val &= ~HDMI_CFG_DEVICE_EN; 762 hdmi_write(hdmi, val, HDMI_CFG); 763 764 hdmi_write(hdmi, 0xffffffff, HDMI_INT_CLR); 765 766 /* Stop the phy */ 767 hdmi->phy_ops->stop(hdmi); 768 769 /* Reset info frame transmission */ 770 hdmi_infoframe_reset(hdmi, HDMI_IFRAME_SLOT_AVI); 771 hdmi_infoframe_reset(hdmi, HDMI_IFRAME_SLOT_AUDIO); 772 hdmi_infoframe_reset(hdmi, HDMI_IFRAME_SLOT_VENDOR); 773 774 /* Set the default channel data to be a dark red */ 775 hdmi_write(hdmi, 0x0000, HDMI_DFLT_CHL0_DAT); 776 hdmi_write(hdmi, 0x0000, HDMI_DFLT_CHL1_DAT); 777 hdmi_write(hdmi, 0x0060, HDMI_DFLT_CHL2_DAT); 778 779 /* Disable/unprepare hdmi clock */ 780 clk_disable_unprepare(hdmi->clk_phy); 781 clk_disable_unprepare(hdmi->clk_tmds); 782 clk_disable_unprepare(hdmi->clk_pix); 783 784 hdmi->enabled = false; 785 786 cec_notifier_set_phys_addr(hdmi->notifier, CEC_PHYS_ADDR_INVALID); 787 } 788 789 /* 790 * sti_hdmi_audio_get_non_coherent_n() - get N parameter for non-coherent 791 * clocks. None-coherent clocks means that audio and TMDS clocks have not the 792 * same source (drifts between clocks). In this case assumption is that CTS is 793 * automatically calculated by hardware. 794 * 795 * @audio_fs: audio frame clock frequency in Hz 796 * 797 * Values computed are based on table described in HDMI specification 1.4b 798 * 799 * Returns n value. 800 */ 801 static int sti_hdmi_audio_get_non_coherent_n(unsigned int audio_fs) 802 { 803 unsigned int n; 804 805 switch (audio_fs) { 806 case 32000: 807 n = 4096; 808 break; 809 case 44100: 810 n = 6272; 811 break; 812 case 48000: 813 n = 6144; 814 break; 815 case 88200: 816 n = 6272 * 2; 817 break; 818 case 96000: 819 n = 6144 * 2; 820 break; 821 case 176400: 822 n = 6272 * 4; 823 break; 824 case 192000: 825 n = 6144 * 4; 826 break; 827 default: 828 /* Not pre-defined, recommended value: 128 * fs / 1000 */ 829 n = (audio_fs * 128) / 1000; 830 } 831 832 return n; 833 } 834 835 static int hdmi_audio_configure(struct sti_hdmi *hdmi) 836 { 837 int audio_cfg, n; 838 struct hdmi_audio_params *params = &hdmi->audio; 839 struct hdmi_audio_infoframe *info = ¶ms->cea; 840 841 DRM_DEBUG_DRIVER("\n"); 842 843 if (!hdmi->enabled) 844 return 0; 845 846 /* update N parameter */ 847 n = sti_hdmi_audio_get_non_coherent_n(params->sample_rate); 848 849 DRM_DEBUG_DRIVER("Audio rate = %d Hz, TMDS clock = %d Hz, n = %d\n", 850 params->sample_rate, hdmi->mode.clock * 1000, n); 851 hdmi_write(hdmi, n, HDMI_AUDN); 852 853 /* update HDMI registers according to configuration */ 854 audio_cfg = HDMI_AUD_CFG_SPDIF_DIV_2 | HDMI_AUD_CFG_DTS_INVALID | 855 HDMI_AUD_CFG_ONE_BIT_INVALID; 856 857 switch (info->channels) { 858 case 8: 859 audio_cfg |= HDMI_AUD_CFG_CH78_VALID; 860 fallthrough; 861 case 6: 862 audio_cfg |= HDMI_AUD_CFG_CH56_VALID; 863 fallthrough; 864 case 4: 865 audio_cfg |= HDMI_AUD_CFG_CH34_VALID | HDMI_AUD_CFG_8CH; 866 fallthrough; 867 case 2: 868 audio_cfg |= HDMI_AUD_CFG_CH12_VALID; 869 break; 870 default: 871 DRM_ERROR("ERROR: Unsupported number of channels (%d)!\n", 872 info->channels); 873 return -EINVAL; 874 } 875 876 hdmi_write(hdmi, audio_cfg, HDMI_AUDIO_CFG); 877 878 return hdmi_audio_infoframe_config(hdmi); 879 } 880 881 static void sti_hdmi_pre_enable(struct drm_bridge *bridge) 882 { 883 struct sti_hdmi *hdmi = bridge->driver_private; 884 885 DRM_DEBUG_DRIVER("\n"); 886 887 if (hdmi->enabled) 888 return; 889 890 /* Prepare/enable clocks */ 891 if (clk_prepare_enable(hdmi->clk_pix)) 892 DRM_ERROR("Failed to prepare/enable hdmi_pix clk\n"); 893 if (clk_prepare_enable(hdmi->clk_tmds)) 894 DRM_ERROR("Failed to prepare/enable hdmi_tmds clk\n"); 895 if (clk_prepare_enable(hdmi->clk_phy)) 896 DRM_ERROR("Failed to prepare/enable hdmi_rejection_pll clk\n"); 897 898 hdmi->enabled = true; 899 900 /* Program hdmi serializer and start phy */ 901 if (!hdmi->phy_ops->start(hdmi)) { 902 DRM_ERROR("Unable to start hdmi phy\n"); 903 return; 904 } 905 906 /* Program hdmi active area */ 907 hdmi_active_area(hdmi); 908 909 /* Enable working interrupts */ 910 hdmi_write(hdmi, HDMI_WORKING_INT, HDMI_INT_EN); 911 912 /* Program hdmi config */ 913 hdmi_config(hdmi); 914 915 /* Program AVI infoframe */ 916 if (hdmi_avi_infoframe_config(hdmi)) 917 DRM_ERROR("Unable to configure AVI infoframe\n"); 918 919 if (hdmi->audio.enabled) { 920 if (hdmi_audio_configure(hdmi)) 921 DRM_ERROR("Unable to configure audio\n"); 922 } else { 923 hdmi_audio_infoframe_config(hdmi); 924 } 925 926 /* Program VS infoframe */ 927 if (hdmi_vendor_infoframe_config(hdmi)) 928 DRM_ERROR("Unable to configure VS infoframe\n"); 929 930 /* Sw reset */ 931 hdmi_swreset(hdmi); 932 } 933 934 static void sti_hdmi_set_mode(struct drm_bridge *bridge, 935 const struct drm_display_mode *mode, 936 const struct drm_display_mode *adjusted_mode) 937 { 938 struct sti_hdmi *hdmi = bridge->driver_private; 939 int ret; 940 941 DRM_DEBUG_DRIVER("\n"); 942 943 /* Copy the drm display mode in the connector local structure */ 944 memcpy(&hdmi->mode, mode, sizeof(struct drm_display_mode)); 945 946 /* Update clock framerate according to the selected mode */ 947 ret = clk_set_rate(hdmi->clk_pix, mode->clock * 1000); 948 if (ret < 0) { 949 DRM_ERROR("Cannot set rate (%dHz) for hdmi_pix clk\n", 950 mode->clock * 1000); 951 return; 952 } 953 ret = clk_set_rate(hdmi->clk_phy, mode->clock * 1000); 954 if (ret < 0) { 955 DRM_ERROR("Cannot set rate (%dHz) for hdmi_rejection_pll clk\n", 956 mode->clock * 1000); 957 return; 958 } 959 } 960 961 static void sti_hdmi_bridge_nope(struct drm_bridge *bridge) 962 { 963 /* do nothing */ 964 } 965 966 static const struct drm_bridge_funcs sti_hdmi_bridge_funcs = { 967 .pre_enable = sti_hdmi_pre_enable, 968 .enable = sti_hdmi_bridge_nope, 969 .disable = sti_hdmi_disable, 970 .post_disable = sti_hdmi_bridge_nope, 971 .mode_set = sti_hdmi_set_mode, 972 }; 973 974 static int sti_hdmi_connector_get_modes(struct drm_connector *connector) 975 { 976 struct sti_hdmi_connector *hdmi_connector 977 = to_sti_hdmi_connector(connector); 978 struct sti_hdmi *hdmi = hdmi_connector->hdmi; 979 struct edid *edid; 980 int count; 981 982 DRM_DEBUG_DRIVER("\n"); 983 984 edid = drm_get_edid(connector, hdmi->ddc_adapt); 985 if (!edid) 986 goto fail; 987 988 hdmi->hdmi_monitor = drm_detect_hdmi_monitor(edid); 989 DRM_DEBUG_KMS("%s : %dx%d cm\n", 990 (hdmi->hdmi_monitor ? "hdmi monitor" : "dvi monitor"), 991 edid->width_cm, edid->height_cm); 992 cec_notifier_set_phys_addr_from_edid(hdmi->notifier, edid); 993 994 count = drm_add_edid_modes(connector, edid); 995 drm_connector_update_edid_property(connector, edid); 996 997 kfree(edid); 998 return count; 999 1000 fail: 1001 DRM_ERROR("Can't read HDMI EDID\n"); 1002 return 0; 1003 } 1004 1005 #define CLK_TOLERANCE_HZ 50 1006 1007 static int sti_hdmi_connector_mode_valid(struct drm_connector *connector, 1008 struct drm_display_mode *mode) 1009 { 1010 int target = mode->clock * 1000; 1011 int target_min = target - CLK_TOLERANCE_HZ; 1012 int target_max = target + CLK_TOLERANCE_HZ; 1013 int result; 1014 struct sti_hdmi_connector *hdmi_connector 1015 = to_sti_hdmi_connector(connector); 1016 struct sti_hdmi *hdmi = hdmi_connector->hdmi; 1017 1018 1019 result = clk_round_rate(hdmi->clk_pix, target); 1020 1021 DRM_DEBUG_DRIVER("target rate = %d => available rate = %d\n", 1022 target, result); 1023 1024 if ((result < target_min) || (result > target_max)) { 1025 DRM_DEBUG_DRIVER("hdmi pixclk=%d not supported\n", target); 1026 return MODE_BAD; 1027 } 1028 1029 return MODE_OK; 1030 } 1031 1032 static const 1033 struct drm_connector_helper_funcs sti_hdmi_connector_helper_funcs = { 1034 .get_modes = sti_hdmi_connector_get_modes, 1035 .mode_valid = sti_hdmi_connector_mode_valid, 1036 }; 1037 1038 /* get detection status of display device */ 1039 static enum drm_connector_status 1040 sti_hdmi_connector_detect(struct drm_connector *connector, bool force) 1041 { 1042 struct sti_hdmi_connector *hdmi_connector 1043 = to_sti_hdmi_connector(connector); 1044 struct sti_hdmi *hdmi = hdmi_connector->hdmi; 1045 1046 DRM_DEBUG_DRIVER("\n"); 1047 1048 if (hdmi->hpd) { 1049 DRM_DEBUG_DRIVER("hdmi cable connected\n"); 1050 return connector_status_connected; 1051 } 1052 1053 DRM_DEBUG_DRIVER("hdmi cable disconnected\n"); 1054 cec_notifier_set_phys_addr(hdmi->notifier, CEC_PHYS_ADDR_INVALID); 1055 return connector_status_disconnected; 1056 } 1057 1058 static void sti_hdmi_connector_init_property(struct drm_device *drm_dev, 1059 struct drm_connector *connector) 1060 { 1061 struct sti_hdmi_connector *hdmi_connector 1062 = to_sti_hdmi_connector(connector); 1063 struct sti_hdmi *hdmi = hdmi_connector->hdmi; 1064 struct drm_property *prop; 1065 1066 /* colorspace property */ 1067 hdmi->colorspace = DEFAULT_COLORSPACE_MODE; 1068 prop = drm_property_create_enum(drm_dev, 0, "colorspace", 1069 colorspace_mode_names, 1070 ARRAY_SIZE(colorspace_mode_names)); 1071 if (!prop) { 1072 DRM_ERROR("fails to create colorspace property\n"); 1073 return; 1074 } 1075 hdmi_connector->colorspace_property = prop; 1076 drm_object_attach_property(&connector->base, prop, hdmi->colorspace); 1077 } 1078 1079 static int 1080 sti_hdmi_connector_set_property(struct drm_connector *connector, 1081 struct drm_connector_state *state, 1082 struct drm_property *property, 1083 uint64_t val) 1084 { 1085 struct sti_hdmi_connector *hdmi_connector 1086 = to_sti_hdmi_connector(connector); 1087 struct sti_hdmi *hdmi = hdmi_connector->hdmi; 1088 1089 if (property == hdmi_connector->colorspace_property) { 1090 hdmi->colorspace = val; 1091 return 0; 1092 } 1093 1094 DRM_ERROR("failed to set hdmi connector property\n"); 1095 return -EINVAL; 1096 } 1097 1098 static int 1099 sti_hdmi_connector_get_property(struct drm_connector *connector, 1100 const struct drm_connector_state *state, 1101 struct drm_property *property, 1102 uint64_t *val) 1103 { 1104 struct sti_hdmi_connector *hdmi_connector 1105 = to_sti_hdmi_connector(connector); 1106 struct sti_hdmi *hdmi = hdmi_connector->hdmi; 1107 1108 if (property == hdmi_connector->colorspace_property) { 1109 *val = hdmi->colorspace; 1110 return 0; 1111 } 1112 1113 DRM_ERROR("failed to get hdmi connector property\n"); 1114 return -EINVAL; 1115 } 1116 1117 static int sti_hdmi_late_register(struct drm_connector *connector) 1118 { 1119 struct sti_hdmi_connector *hdmi_connector 1120 = to_sti_hdmi_connector(connector); 1121 struct sti_hdmi *hdmi = hdmi_connector->hdmi; 1122 1123 hdmi_debugfs_init(hdmi, hdmi->drm_dev->primary); 1124 1125 return 0; 1126 } 1127 1128 static const struct drm_connector_funcs sti_hdmi_connector_funcs = { 1129 .fill_modes = drm_helper_probe_single_connector_modes, 1130 .detect = sti_hdmi_connector_detect, 1131 .destroy = drm_connector_cleanup, 1132 .reset = drm_atomic_helper_connector_reset, 1133 .atomic_set_property = sti_hdmi_connector_set_property, 1134 .atomic_get_property = sti_hdmi_connector_get_property, 1135 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 1136 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 1137 .late_register = sti_hdmi_late_register, 1138 }; 1139 1140 static struct drm_encoder *sti_hdmi_find_encoder(struct drm_device *dev) 1141 { 1142 struct drm_encoder *encoder; 1143 1144 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 1145 if (encoder->encoder_type == DRM_MODE_ENCODER_TMDS) 1146 return encoder; 1147 } 1148 1149 return NULL; 1150 } 1151 1152 static void hdmi_audio_shutdown(struct device *dev, void *data) 1153 { 1154 struct sti_hdmi *hdmi = dev_get_drvdata(dev); 1155 int audio_cfg; 1156 1157 DRM_DEBUG_DRIVER("\n"); 1158 1159 /* disable audio */ 1160 audio_cfg = HDMI_AUD_CFG_SPDIF_DIV_2 | HDMI_AUD_CFG_DTS_INVALID | 1161 HDMI_AUD_CFG_ONE_BIT_INVALID; 1162 hdmi_write(hdmi, audio_cfg, HDMI_AUDIO_CFG); 1163 1164 hdmi->audio.enabled = false; 1165 hdmi_audio_infoframe_config(hdmi); 1166 } 1167 1168 static int hdmi_audio_hw_params(struct device *dev, 1169 void *data, 1170 struct hdmi_codec_daifmt *daifmt, 1171 struct hdmi_codec_params *params) 1172 { 1173 struct sti_hdmi *hdmi = dev_get_drvdata(dev); 1174 int ret; 1175 1176 DRM_DEBUG_DRIVER("\n"); 1177 1178 if ((daifmt->fmt != HDMI_I2S) || daifmt->bit_clk_inv || 1179 daifmt->frame_clk_inv || daifmt->bit_clk_provider || 1180 daifmt->frame_clk_provider) { 1181 dev_err(dev, "%s: Bad flags %d %d %d %d\n", __func__, 1182 daifmt->bit_clk_inv, daifmt->frame_clk_inv, 1183 daifmt->bit_clk_provider, 1184 daifmt->frame_clk_provider); 1185 return -EINVAL; 1186 } 1187 1188 hdmi->audio.sample_width = params->sample_width; 1189 hdmi->audio.sample_rate = params->sample_rate; 1190 hdmi->audio.cea = params->cea; 1191 1192 hdmi->audio.enabled = true; 1193 1194 ret = hdmi_audio_configure(hdmi); 1195 if (ret < 0) 1196 return ret; 1197 1198 return 0; 1199 } 1200 1201 static int hdmi_audio_mute(struct device *dev, void *data, 1202 bool enable, int direction) 1203 { 1204 struct sti_hdmi *hdmi = dev_get_drvdata(dev); 1205 1206 DRM_DEBUG_DRIVER("%s\n", enable ? "enable" : "disable"); 1207 1208 if (enable) 1209 hdmi_write(hdmi, HDMI_SAMPLE_FLAT_ALL, HDMI_SAMPLE_FLAT_MASK); 1210 else 1211 hdmi_write(hdmi, HDMI_SAMPLE_FLAT_NO, HDMI_SAMPLE_FLAT_MASK); 1212 1213 return 0; 1214 } 1215 1216 static int hdmi_audio_get_eld(struct device *dev, void *data, uint8_t *buf, size_t len) 1217 { 1218 struct sti_hdmi *hdmi = dev_get_drvdata(dev); 1219 struct drm_connector *connector = hdmi->drm_connector; 1220 1221 DRM_DEBUG_DRIVER("\n"); 1222 memcpy(buf, connector->eld, min(sizeof(connector->eld), len)); 1223 1224 return 0; 1225 } 1226 1227 static const struct hdmi_codec_ops audio_codec_ops = { 1228 .hw_params = hdmi_audio_hw_params, 1229 .audio_shutdown = hdmi_audio_shutdown, 1230 .mute_stream = hdmi_audio_mute, 1231 .get_eld = hdmi_audio_get_eld, 1232 .no_capture_mute = 1, 1233 }; 1234 1235 static int sti_hdmi_register_audio_driver(struct device *dev, 1236 struct sti_hdmi *hdmi) 1237 { 1238 struct hdmi_codec_pdata codec_data = { 1239 .ops = &audio_codec_ops, 1240 .max_i2s_channels = 8, 1241 .i2s = 1, 1242 }; 1243 1244 DRM_DEBUG_DRIVER("\n"); 1245 1246 hdmi->audio.enabled = false; 1247 1248 hdmi->audio_pdev = platform_device_register_data( 1249 dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO, 1250 &codec_data, sizeof(codec_data)); 1251 1252 if (IS_ERR(hdmi->audio_pdev)) 1253 return PTR_ERR(hdmi->audio_pdev); 1254 1255 DRM_INFO("%s Driver bound %s\n", HDMI_CODEC_DRV_NAME, dev_name(dev)); 1256 1257 return 0; 1258 } 1259 1260 static int sti_hdmi_bind(struct device *dev, struct device *master, void *data) 1261 { 1262 struct sti_hdmi *hdmi = dev_get_drvdata(dev); 1263 struct drm_device *drm_dev = data; 1264 struct drm_encoder *encoder; 1265 struct sti_hdmi_connector *connector; 1266 struct cec_connector_info conn_info; 1267 struct drm_connector *drm_connector; 1268 struct drm_bridge *bridge; 1269 int err; 1270 1271 /* Set the drm device handle */ 1272 hdmi->drm_dev = drm_dev; 1273 1274 encoder = sti_hdmi_find_encoder(drm_dev); 1275 if (!encoder) 1276 return -EINVAL; 1277 1278 connector = devm_kzalloc(dev, sizeof(*connector), GFP_KERNEL); 1279 if (!connector) 1280 return -EINVAL; 1281 1282 connector->hdmi = hdmi; 1283 1284 bridge = devm_kzalloc(dev, sizeof(*bridge), GFP_KERNEL); 1285 if (!bridge) 1286 return -EINVAL; 1287 1288 bridge->driver_private = hdmi; 1289 bridge->funcs = &sti_hdmi_bridge_funcs; 1290 drm_bridge_attach(encoder, bridge, NULL, 0); 1291 1292 connector->encoder = encoder; 1293 1294 drm_connector = (struct drm_connector *)connector; 1295 1296 drm_connector->polled = DRM_CONNECTOR_POLL_HPD; 1297 1298 drm_connector_init_with_ddc(drm_dev, drm_connector, 1299 &sti_hdmi_connector_funcs, 1300 DRM_MODE_CONNECTOR_HDMIA, 1301 hdmi->ddc_adapt); 1302 drm_connector_helper_add(drm_connector, 1303 &sti_hdmi_connector_helper_funcs); 1304 1305 /* initialise property */ 1306 sti_hdmi_connector_init_property(drm_dev, drm_connector); 1307 1308 hdmi->drm_connector = drm_connector; 1309 1310 err = drm_connector_attach_encoder(drm_connector, encoder); 1311 if (err) { 1312 DRM_ERROR("Failed to attach a connector to a encoder\n"); 1313 goto err_sysfs; 1314 } 1315 1316 err = sti_hdmi_register_audio_driver(dev, hdmi); 1317 if (err) { 1318 DRM_ERROR("Failed to attach an audio codec\n"); 1319 goto err_sysfs; 1320 } 1321 1322 /* Initialize audio infoframe */ 1323 err = hdmi_audio_infoframe_init(&hdmi->audio.cea); 1324 if (err) { 1325 DRM_ERROR("Failed to init audio infoframe\n"); 1326 goto err_sysfs; 1327 } 1328 1329 cec_fill_conn_info_from_drm(&conn_info, drm_connector); 1330 hdmi->notifier = cec_notifier_conn_register(&hdmi->dev, NULL, 1331 &conn_info); 1332 if (!hdmi->notifier) { 1333 hdmi->drm_connector = NULL; 1334 return -ENOMEM; 1335 } 1336 1337 /* Enable default interrupts */ 1338 hdmi_write(hdmi, HDMI_DEFAULT_INT, HDMI_INT_EN); 1339 1340 return 0; 1341 1342 err_sysfs: 1343 hdmi->drm_connector = NULL; 1344 return -EINVAL; 1345 } 1346 1347 static void sti_hdmi_unbind(struct device *dev, 1348 struct device *master, void *data) 1349 { 1350 struct sti_hdmi *hdmi = dev_get_drvdata(dev); 1351 1352 cec_notifier_conn_unregister(hdmi->notifier); 1353 } 1354 1355 static const struct component_ops sti_hdmi_ops = { 1356 .bind = sti_hdmi_bind, 1357 .unbind = sti_hdmi_unbind, 1358 }; 1359 1360 static const struct of_device_id hdmi_of_match[] = { 1361 { 1362 .compatible = "st,stih407-hdmi", 1363 .data = &tx3g4c28phy_ops, 1364 }, { 1365 /* end node */ 1366 } 1367 }; 1368 MODULE_DEVICE_TABLE(of, hdmi_of_match); 1369 1370 static int sti_hdmi_probe(struct platform_device *pdev) 1371 { 1372 struct device *dev = &pdev->dev; 1373 struct sti_hdmi *hdmi; 1374 struct device_node *np = dev->of_node; 1375 struct resource *res; 1376 struct device_node *ddc; 1377 int ret; 1378 1379 DRM_INFO("%s\n", __func__); 1380 1381 hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL); 1382 if (!hdmi) 1383 return -ENOMEM; 1384 1385 ddc = of_parse_phandle(pdev->dev.of_node, "ddc", 0); 1386 if (ddc) { 1387 hdmi->ddc_adapt = of_get_i2c_adapter_by_node(ddc); 1388 of_node_put(ddc); 1389 if (!hdmi->ddc_adapt) 1390 return -EPROBE_DEFER; 1391 } 1392 1393 hdmi->dev = pdev->dev; 1394 1395 /* Get resources */ 1396 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hdmi-reg"); 1397 if (!res) { 1398 DRM_ERROR("Invalid hdmi resource\n"); 1399 ret = -ENOMEM; 1400 goto release_adapter; 1401 } 1402 hdmi->regs = devm_ioremap(dev, res->start, resource_size(res)); 1403 if (!hdmi->regs) { 1404 ret = -ENOMEM; 1405 goto release_adapter; 1406 } 1407 1408 hdmi->phy_ops = (struct hdmi_phy_ops *) 1409 of_match_node(hdmi_of_match, np)->data; 1410 1411 /* Get clock resources */ 1412 hdmi->clk_pix = devm_clk_get(dev, "pix"); 1413 if (IS_ERR(hdmi->clk_pix)) { 1414 DRM_ERROR("Cannot get hdmi_pix clock\n"); 1415 ret = PTR_ERR(hdmi->clk_pix); 1416 goto release_adapter; 1417 } 1418 1419 hdmi->clk_tmds = devm_clk_get(dev, "tmds"); 1420 if (IS_ERR(hdmi->clk_tmds)) { 1421 DRM_ERROR("Cannot get hdmi_tmds clock\n"); 1422 ret = PTR_ERR(hdmi->clk_tmds); 1423 goto release_adapter; 1424 } 1425 1426 hdmi->clk_phy = devm_clk_get(dev, "phy"); 1427 if (IS_ERR(hdmi->clk_phy)) { 1428 DRM_ERROR("Cannot get hdmi_phy clock\n"); 1429 ret = PTR_ERR(hdmi->clk_phy); 1430 goto release_adapter; 1431 } 1432 1433 hdmi->clk_audio = devm_clk_get(dev, "audio"); 1434 if (IS_ERR(hdmi->clk_audio)) { 1435 DRM_ERROR("Cannot get hdmi_audio clock\n"); 1436 ret = PTR_ERR(hdmi->clk_audio); 1437 goto release_adapter; 1438 } 1439 1440 hdmi->hpd = readl(hdmi->regs + HDMI_STA) & HDMI_STA_HOT_PLUG; 1441 1442 init_waitqueue_head(&hdmi->wait_event); 1443 1444 hdmi->irq = platform_get_irq_byname(pdev, "irq"); 1445 if (hdmi->irq < 0) { 1446 DRM_ERROR("Cannot get HDMI irq\n"); 1447 ret = hdmi->irq; 1448 goto release_adapter; 1449 } 1450 1451 ret = devm_request_threaded_irq(dev, hdmi->irq, hdmi_irq, 1452 hdmi_irq_thread, IRQF_ONESHOT, dev_name(dev), hdmi); 1453 if (ret) { 1454 DRM_ERROR("Failed to register HDMI interrupt\n"); 1455 goto release_adapter; 1456 } 1457 1458 hdmi->reset = devm_reset_control_get(dev, "hdmi"); 1459 /* Take hdmi out of reset */ 1460 if (!IS_ERR(hdmi->reset)) 1461 reset_control_deassert(hdmi->reset); 1462 1463 platform_set_drvdata(pdev, hdmi); 1464 1465 return component_add(&pdev->dev, &sti_hdmi_ops); 1466 1467 release_adapter: 1468 i2c_put_adapter(hdmi->ddc_adapt); 1469 1470 return ret; 1471 } 1472 1473 static int sti_hdmi_remove(struct platform_device *pdev) 1474 { 1475 struct sti_hdmi *hdmi = dev_get_drvdata(&pdev->dev); 1476 1477 i2c_put_adapter(hdmi->ddc_adapt); 1478 if (hdmi->audio_pdev) 1479 platform_device_unregister(hdmi->audio_pdev); 1480 component_del(&pdev->dev, &sti_hdmi_ops); 1481 1482 return 0; 1483 } 1484 1485 struct platform_driver sti_hdmi_driver = { 1486 .driver = { 1487 .name = "sti-hdmi", 1488 .owner = THIS_MODULE, 1489 .of_match_table = hdmi_of_match, 1490 }, 1491 .probe = sti_hdmi_probe, 1492 .remove = sti_hdmi_remove, 1493 }; 1494 1495 MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>"); 1496 MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver"); 1497 MODULE_LICENSE("GPL"); 1498