1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2015 Broadcom 4 * Copyright (c) 2014 The Linux Foundation. All rights reserved. 5 * Copyright (C) 2013 Red Hat 6 * Author: Rob Clark <robdclark@gmail.com> 7 */ 8 9 /** 10 * DOC: VC4 Falcon HDMI module 11 * 12 * The HDMI core has a state machine and a PHY. On BCM2835, most of 13 * the unit operates off of the HSM clock from CPRMAN. It also 14 * internally uses the PLLH_PIX clock for the PHY. 15 * 16 * HDMI infoframes are kept within a small packet ram, where each 17 * packet can be individually enabled for including in a frame. 18 * 19 * HDMI audio is implemented entirely within the HDMI IP block. A 20 * register in the HDMI encoder takes SPDIF frames from the DMA engine 21 * and transfers them over an internal MAI (multi-channel audio 22 * interconnect) bus to the encoder side for insertion into the video 23 * blank regions. 24 * 25 * The driver's HDMI encoder does not yet support power management. 26 * The HDMI encoder's power domain and the HSM/pixel clocks are kept 27 * continuously running, and only the HDMI logic and packet ram are 28 * powered off/on at disable/enable time. 29 * 30 * The driver does not yet support CEC control, though the HDMI 31 * encoder block has CEC support. 32 */ 33 34 #include <drm/drm_atomic_helper.h> 35 #include <drm/drm_edid.h> 36 #include <drm/drm_probe_helper.h> 37 #include <drm/drm_simple_kms_helper.h> 38 #include <drm/drm_scdc_helper.h> 39 #include <linux/clk.h> 40 #include <linux/component.h> 41 #include <linux/i2c.h> 42 #include <linux/of_address.h> 43 #include <linux/of_gpio.h> 44 #include <linux/of_platform.h> 45 #include <linux/pm_runtime.h> 46 #include <linux/rational.h> 47 #include <linux/reset.h> 48 #include <sound/dmaengine_pcm.h> 49 #include <sound/hdmi-codec.h> 50 #include <sound/pcm_drm_eld.h> 51 #include <sound/pcm_params.h> 52 #include <sound/soc.h> 53 #include "media/cec.h" 54 #include "vc4_drv.h" 55 #include "vc4_hdmi.h" 56 #include "vc4_hdmi_regs.h" 57 #include "vc4_regs.h" 58 59 #define VC5_HDMI_HORZA_HFP_SHIFT 16 60 #define VC5_HDMI_HORZA_HFP_MASK VC4_MASK(28, 16) 61 #define VC5_HDMI_HORZA_VPOS BIT(15) 62 #define VC5_HDMI_HORZA_HPOS BIT(14) 63 #define VC5_HDMI_HORZA_HAP_SHIFT 0 64 #define VC5_HDMI_HORZA_HAP_MASK VC4_MASK(13, 0) 65 66 #define VC5_HDMI_HORZB_HBP_SHIFT 16 67 #define VC5_HDMI_HORZB_HBP_MASK VC4_MASK(26, 16) 68 #define VC5_HDMI_HORZB_HSP_SHIFT 0 69 #define VC5_HDMI_HORZB_HSP_MASK VC4_MASK(10, 0) 70 71 #define VC5_HDMI_VERTA_VSP_SHIFT 24 72 #define VC5_HDMI_VERTA_VSP_MASK VC4_MASK(28, 24) 73 #define VC5_HDMI_VERTA_VFP_SHIFT 16 74 #define VC5_HDMI_VERTA_VFP_MASK VC4_MASK(22, 16) 75 #define VC5_HDMI_VERTA_VAL_SHIFT 0 76 #define VC5_HDMI_VERTA_VAL_MASK VC4_MASK(12, 0) 77 78 #define VC5_HDMI_VERTB_VSPO_SHIFT 16 79 #define VC5_HDMI_VERTB_VSPO_MASK VC4_MASK(29, 16) 80 81 #define VC5_HDMI_SCRAMBLER_CTL_ENABLE BIT(0) 82 83 #define VC5_HDMI_DEEP_COLOR_CONFIG_1_INIT_PACK_PHASE_SHIFT 8 84 #define VC5_HDMI_DEEP_COLOR_CONFIG_1_INIT_PACK_PHASE_MASK VC4_MASK(10, 8) 85 86 #define VC5_HDMI_DEEP_COLOR_CONFIG_1_COLOR_DEPTH_SHIFT 0 87 #define VC5_HDMI_DEEP_COLOR_CONFIG_1_COLOR_DEPTH_MASK VC4_MASK(3, 0) 88 89 #define VC5_HDMI_GCP_CONFIG_GCP_ENABLE BIT(31) 90 91 #define VC5_HDMI_GCP_WORD_1_GCP_SUBPACKET_BYTE_1_SHIFT 8 92 #define VC5_HDMI_GCP_WORD_1_GCP_SUBPACKET_BYTE_1_MASK VC4_MASK(15, 8) 93 94 # define VC4_HD_M_SW_RST BIT(2) 95 # define VC4_HD_M_ENABLE BIT(0) 96 97 #define CEC_CLOCK_FREQ 40000 98 99 #define HDMI_14_MAX_TMDS_CLK (340 * 1000 * 1000) 100 101 static bool vc4_hdmi_mode_needs_scrambling(const struct drm_display_mode *mode) 102 { 103 return (mode->clock * 1000) > HDMI_14_MAX_TMDS_CLK; 104 } 105 106 static int vc4_hdmi_debugfs_regs(struct seq_file *m, void *unused) 107 { 108 struct drm_info_node *node = (struct drm_info_node *)m->private; 109 struct vc4_hdmi *vc4_hdmi = node->info_ent->data; 110 struct drm_printer p = drm_seq_file_printer(m); 111 112 drm_print_regset32(&p, &vc4_hdmi->hdmi_regset); 113 drm_print_regset32(&p, &vc4_hdmi->hd_regset); 114 115 return 0; 116 } 117 118 static void vc4_hdmi_reset(struct vc4_hdmi *vc4_hdmi) 119 { 120 HDMI_WRITE(HDMI_M_CTL, VC4_HD_M_SW_RST); 121 udelay(1); 122 HDMI_WRITE(HDMI_M_CTL, 0); 123 124 HDMI_WRITE(HDMI_M_CTL, VC4_HD_M_ENABLE); 125 126 HDMI_WRITE(HDMI_SW_RESET_CONTROL, 127 VC4_HDMI_SW_RESET_HDMI | 128 VC4_HDMI_SW_RESET_FORMAT_DETECT); 129 130 HDMI_WRITE(HDMI_SW_RESET_CONTROL, 0); 131 } 132 133 static void vc5_hdmi_reset(struct vc4_hdmi *vc4_hdmi) 134 { 135 reset_control_reset(vc4_hdmi->reset); 136 137 HDMI_WRITE(HDMI_DVP_CTL, 0); 138 139 HDMI_WRITE(HDMI_CLOCK_STOP, 140 HDMI_READ(HDMI_CLOCK_STOP) | VC4_DVP_HT_CLOCK_STOP_PIXEL); 141 } 142 143 #ifdef CONFIG_DRM_VC4_HDMI_CEC 144 static void vc4_hdmi_cec_update_clk_div(struct vc4_hdmi *vc4_hdmi) 145 { 146 u16 clk_cnt; 147 u32 value; 148 149 value = HDMI_READ(HDMI_CEC_CNTRL_1); 150 value &= ~VC4_HDMI_CEC_DIV_CLK_CNT_MASK; 151 152 /* 153 * Set the clock divider: the hsm_clock rate and this divider 154 * setting will give a 40 kHz CEC clock. 155 */ 156 clk_cnt = clk_get_rate(vc4_hdmi->cec_clock) / CEC_CLOCK_FREQ; 157 value |= clk_cnt << VC4_HDMI_CEC_DIV_CLK_CNT_SHIFT; 158 HDMI_WRITE(HDMI_CEC_CNTRL_1, value); 159 } 160 #else 161 static void vc4_hdmi_cec_update_clk_div(struct vc4_hdmi *vc4_hdmi) {} 162 #endif 163 164 static enum drm_connector_status 165 vc4_hdmi_connector_detect(struct drm_connector *connector, bool force) 166 { 167 struct vc4_hdmi *vc4_hdmi = connector_to_vc4_hdmi(connector); 168 bool connected = false; 169 170 if (vc4_hdmi->hpd_gpio && 171 gpiod_get_value_cansleep(vc4_hdmi->hpd_gpio)) { 172 connected = true; 173 } else if (drm_probe_ddc(vc4_hdmi->ddc)) { 174 connected = true; 175 } else if (HDMI_READ(HDMI_HOTPLUG) & VC4_HDMI_HOTPLUG_CONNECTED) { 176 connected = true; 177 } 178 179 if (connected) { 180 if (connector->status != connector_status_connected) { 181 struct edid *edid = drm_get_edid(connector, vc4_hdmi->ddc); 182 183 if (edid) { 184 cec_s_phys_addr_from_edid(vc4_hdmi->cec_adap, edid); 185 vc4_hdmi->encoder.hdmi_monitor = drm_detect_hdmi_monitor(edid); 186 kfree(edid); 187 } 188 } 189 190 return connector_status_connected; 191 } 192 193 cec_phys_addr_invalidate(vc4_hdmi->cec_adap); 194 return connector_status_disconnected; 195 } 196 197 static void vc4_hdmi_connector_destroy(struct drm_connector *connector) 198 { 199 drm_connector_unregister(connector); 200 drm_connector_cleanup(connector); 201 } 202 203 static int vc4_hdmi_connector_get_modes(struct drm_connector *connector) 204 { 205 struct vc4_hdmi *vc4_hdmi = connector_to_vc4_hdmi(connector); 206 struct vc4_hdmi_encoder *vc4_encoder = &vc4_hdmi->encoder; 207 int ret = 0; 208 struct edid *edid; 209 210 edid = drm_get_edid(connector, vc4_hdmi->ddc); 211 cec_s_phys_addr_from_edid(vc4_hdmi->cec_adap, edid); 212 if (!edid) 213 return -ENODEV; 214 215 vc4_encoder->hdmi_monitor = drm_detect_hdmi_monitor(edid); 216 217 drm_connector_update_edid_property(connector, edid); 218 ret = drm_add_edid_modes(connector, edid); 219 kfree(edid); 220 221 if (vc4_hdmi->disable_4kp60) { 222 struct drm_device *drm = connector->dev; 223 struct drm_display_mode *mode; 224 225 list_for_each_entry(mode, &connector->probed_modes, head) { 226 if (vc4_hdmi_mode_needs_scrambling(mode)) { 227 drm_warn_once(drm, "The core clock cannot reach frequencies high enough to support 4k @ 60Hz."); 228 drm_warn_once(drm, "Please change your config.txt file to add hdmi_enable_4kp60."); 229 } 230 } 231 } 232 233 return ret; 234 } 235 236 static int vc4_hdmi_connector_atomic_check(struct drm_connector *connector, 237 struct drm_atomic_state *state) 238 { 239 struct drm_connector_state *old_state = 240 drm_atomic_get_old_connector_state(state, connector); 241 struct drm_connector_state *new_state = 242 drm_atomic_get_new_connector_state(state, connector); 243 struct drm_crtc *crtc = new_state->crtc; 244 245 if (!crtc) 246 return 0; 247 248 if (old_state->colorspace != new_state->colorspace || 249 !drm_connector_atomic_hdr_metadata_equal(old_state, new_state)) { 250 struct drm_crtc_state *crtc_state; 251 252 crtc_state = drm_atomic_get_crtc_state(state, crtc); 253 if (IS_ERR(crtc_state)) 254 return PTR_ERR(crtc_state); 255 256 crtc_state->mode_changed = true; 257 } 258 259 return 0; 260 } 261 262 static void vc4_hdmi_connector_reset(struct drm_connector *connector) 263 { 264 struct vc4_hdmi_connector_state *old_state = 265 conn_state_to_vc4_hdmi_conn_state(connector->state); 266 struct vc4_hdmi_connector_state *new_state = 267 kzalloc(sizeof(*new_state), GFP_KERNEL); 268 269 if (connector->state) 270 __drm_atomic_helper_connector_destroy_state(connector->state); 271 272 kfree(old_state); 273 __drm_atomic_helper_connector_reset(connector, &new_state->base); 274 275 if (!new_state) 276 return; 277 278 new_state->base.max_bpc = 8; 279 new_state->base.max_requested_bpc = 8; 280 drm_atomic_helper_connector_tv_reset(connector); 281 } 282 283 static struct drm_connector_state * 284 vc4_hdmi_connector_duplicate_state(struct drm_connector *connector) 285 { 286 struct drm_connector_state *conn_state = connector->state; 287 struct vc4_hdmi_connector_state *vc4_state = conn_state_to_vc4_hdmi_conn_state(conn_state); 288 struct vc4_hdmi_connector_state *new_state; 289 290 new_state = kzalloc(sizeof(*new_state), GFP_KERNEL); 291 if (!new_state) 292 return NULL; 293 294 new_state->pixel_rate = vc4_state->pixel_rate; 295 __drm_atomic_helper_connector_duplicate_state(connector, &new_state->base); 296 297 return &new_state->base; 298 } 299 300 static const struct drm_connector_funcs vc4_hdmi_connector_funcs = { 301 .detect = vc4_hdmi_connector_detect, 302 .fill_modes = drm_helper_probe_single_connector_modes, 303 .destroy = vc4_hdmi_connector_destroy, 304 .reset = vc4_hdmi_connector_reset, 305 .atomic_duplicate_state = vc4_hdmi_connector_duplicate_state, 306 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 307 }; 308 309 static const struct drm_connector_helper_funcs vc4_hdmi_connector_helper_funcs = { 310 .get_modes = vc4_hdmi_connector_get_modes, 311 .atomic_check = vc4_hdmi_connector_atomic_check, 312 }; 313 314 static int vc4_hdmi_connector_init(struct drm_device *dev, 315 struct vc4_hdmi *vc4_hdmi) 316 { 317 struct drm_connector *connector = &vc4_hdmi->connector; 318 struct drm_encoder *encoder = &vc4_hdmi->encoder.base.base; 319 int ret; 320 321 drm_connector_init_with_ddc(dev, connector, 322 &vc4_hdmi_connector_funcs, 323 DRM_MODE_CONNECTOR_HDMIA, 324 vc4_hdmi->ddc); 325 drm_connector_helper_add(connector, &vc4_hdmi_connector_helper_funcs); 326 327 /* 328 * Some of the properties below require access to state, like bpc. 329 * Allocate some default initial connector state with our reset helper. 330 */ 331 if (connector->funcs->reset) 332 connector->funcs->reset(connector); 333 334 /* Create and attach TV margin props to this connector. */ 335 ret = drm_mode_create_tv_margin_properties(dev); 336 if (ret) 337 return ret; 338 339 ret = drm_mode_create_hdmi_colorspace_property(connector); 340 if (ret) 341 return ret; 342 343 drm_connector_attach_colorspace_property(connector); 344 drm_connector_attach_tv_margin_properties(connector); 345 drm_connector_attach_max_bpc_property(connector, 8, 12); 346 347 connector->polled = (DRM_CONNECTOR_POLL_CONNECT | 348 DRM_CONNECTOR_POLL_DISCONNECT); 349 350 connector->interlace_allowed = 1; 351 connector->doublescan_allowed = 0; 352 353 if (vc4_hdmi->variant->supports_hdr) 354 drm_connector_attach_hdr_output_metadata_property(connector); 355 356 drm_connector_attach_encoder(connector, encoder); 357 358 return 0; 359 } 360 361 static int vc4_hdmi_stop_packet(struct drm_encoder *encoder, 362 enum hdmi_infoframe_type type, 363 bool poll) 364 { 365 struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder); 366 u32 packet_id = type - 0x80; 367 368 HDMI_WRITE(HDMI_RAM_PACKET_CONFIG, 369 HDMI_READ(HDMI_RAM_PACKET_CONFIG) & ~BIT(packet_id)); 370 371 if (!poll) 372 return 0; 373 374 return wait_for(!(HDMI_READ(HDMI_RAM_PACKET_STATUS) & 375 BIT(packet_id)), 100); 376 } 377 378 static void vc4_hdmi_write_infoframe(struct drm_encoder *encoder, 379 union hdmi_infoframe *frame) 380 { 381 struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder); 382 u32 packet_id = frame->any.type - 0x80; 383 const struct vc4_hdmi_register *ram_packet_start = 384 &vc4_hdmi->variant->registers[HDMI_RAM_PACKET_START]; 385 u32 packet_reg = ram_packet_start->offset + VC4_HDMI_PACKET_STRIDE * packet_id; 386 void __iomem *base = __vc4_hdmi_get_field_base(vc4_hdmi, 387 ram_packet_start->reg); 388 uint8_t buffer[VC4_HDMI_PACKET_STRIDE]; 389 ssize_t len, i; 390 int ret; 391 392 WARN_ONCE(!(HDMI_READ(HDMI_RAM_PACKET_CONFIG) & 393 VC4_HDMI_RAM_PACKET_ENABLE), 394 "Packet RAM has to be on to store the packet."); 395 396 len = hdmi_infoframe_pack(frame, buffer, sizeof(buffer)); 397 if (len < 0) 398 return; 399 400 ret = vc4_hdmi_stop_packet(encoder, frame->any.type, true); 401 if (ret) { 402 DRM_ERROR("Failed to wait for infoframe to go idle: %d\n", ret); 403 return; 404 } 405 406 for (i = 0; i < len; i += 7) { 407 writel(buffer[i + 0] << 0 | 408 buffer[i + 1] << 8 | 409 buffer[i + 2] << 16, 410 base + packet_reg); 411 packet_reg += 4; 412 413 writel(buffer[i + 3] << 0 | 414 buffer[i + 4] << 8 | 415 buffer[i + 5] << 16 | 416 buffer[i + 6] << 24, 417 base + packet_reg); 418 packet_reg += 4; 419 } 420 421 HDMI_WRITE(HDMI_RAM_PACKET_CONFIG, 422 HDMI_READ(HDMI_RAM_PACKET_CONFIG) | BIT(packet_id)); 423 ret = wait_for((HDMI_READ(HDMI_RAM_PACKET_STATUS) & 424 BIT(packet_id)), 100); 425 if (ret) 426 DRM_ERROR("Failed to wait for infoframe to start: %d\n", ret); 427 } 428 429 static void vc4_hdmi_set_avi_infoframe(struct drm_encoder *encoder) 430 { 431 struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder); 432 struct vc4_hdmi_encoder *vc4_encoder = to_vc4_hdmi_encoder(encoder); 433 struct drm_connector *connector = &vc4_hdmi->connector; 434 struct drm_connector_state *cstate = connector->state; 435 struct drm_crtc *crtc = encoder->crtc; 436 const struct drm_display_mode *mode = &crtc->state->adjusted_mode; 437 union hdmi_infoframe frame; 438 int ret; 439 440 ret = drm_hdmi_avi_infoframe_from_display_mode(&frame.avi, 441 connector, mode); 442 if (ret < 0) { 443 DRM_ERROR("couldn't fill AVI infoframe\n"); 444 return; 445 } 446 447 drm_hdmi_avi_infoframe_quant_range(&frame.avi, 448 connector, mode, 449 vc4_encoder->limited_rgb_range ? 450 HDMI_QUANTIZATION_RANGE_LIMITED : 451 HDMI_QUANTIZATION_RANGE_FULL); 452 drm_hdmi_avi_infoframe_colorspace(&frame.avi, cstate); 453 drm_hdmi_avi_infoframe_bars(&frame.avi, cstate); 454 455 vc4_hdmi_write_infoframe(encoder, &frame); 456 } 457 458 static void vc4_hdmi_set_spd_infoframe(struct drm_encoder *encoder) 459 { 460 union hdmi_infoframe frame; 461 int ret; 462 463 ret = hdmi_spd_infoframe_init(&frame.spd, "Broadcom", "Videocore"); 464 if (ret < 0) { 465 DRM_ERROR("couldn't fill SPD infoframe\n"); 466 return; 467 } 468 469 frame.spd.sdi = HDMI_SPD_SDI_PC; 470 471 vc4_hdmi_write_infoframe(encoder, &frame); 472 } 473 474 static void vc4_hdmi_set_audio_infoframe(struct drm_encoder *encoder) 475 { 476 struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder); 477 struct hdmi_audio_infoframe *audio = &vc4_hdmi->audio.infoframe; 478 union hdmi_infoframe frame; 479 480 memcpy(&frame.audio, audio, sizeof(*audio)); 481 vc4_hdmi_write_infoframe(encoder, &frame); 482 } 483 484 static void vc4_hdmi_set_hdr_infoframe(struct drm_encoder *encoder) 485 { 486 struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder); 487 struct drm_connector *connector = &vc4_hdmi->connector; 488 struct drm_connector_state *conn_state = connector->state; 489 union hdmi_infoframe frame; 490 491 if (!vc4_hdmi->variant->supports_hdr) 492 return; 493 494 if (!conn_state->hdr_output_metadata) 495 return; 496 497 if (drm_hdmi_infoframe_set_hdr_metadata(&frame.drm, conn_state)) 498 return; 499 500 vc4_hdmi_write_infoframe(encoder, &frame); 501 } 502 503 static void vc4_hdmi_set_infoframes(struct drm_encoder *encoder) 504 { 505 struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder); 506 507 vc4_hdmi_set_avi_infoframe(encoder); 508 vc4_hdmi_set_spd_infoframe(encoder); 509 /* 510 * If audio was streaming, then we need to reenabled the audio 511 * infoframe here during encoder_enable. 512 */ 513 if (vc4_hdmi->audio.streaming) 514 vc4_hdmi_set_audio_infoframe(encoder); 515 516 vc4_hdmi_set_hdr_infoframe(encoder); 517 } 518 519 static bool vc4_hdmi_supports_scrambling(struct drm_encoder *encoder, 520 struct drm_display_mode *mode) 521 { 522 struct vc4_hdmi_encoder *vc4_encoder = to_vc4_hdmi_encoder(encoder); 523 struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder); 524 struct drm_display_info *display = &vc4_hdmi->connector.display_info; 525 526 if (!vc4_encoder->hdmi_monitor) 527 return false; 528 529 if (!display->hdmi.scdc.supported || 530 !display->hdmi.scdc.scrambling.supported) 531 return false; 532 533 return true; 534 } 535 536 #define SCRAMBLING_POLLING_DELAY_MS 1000 537 538 static void vc4_hdmi_enable_scrambling(struct drm_encoder *encoder) 539 { 540 struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode; 541 struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder); 542 543 if (!vc4_hdmi_supports_scrambling(encoder, mode)) 544 return; 545 546 if (!vc4_hdmi_mode_needs_scrambling(mode)) 547 return; 548 549 drm_scdc_set_high_tmds_clock_ratio(vc4_hdmi->ddc, true); 550 drm_scdc_set_scrambling(vc4_hdmi->ddc, true); 551 552 HDMI_WRITE(HDMI_SCRAMBLER_CTL, HDMI_READ(HDMI_SCRAMBLER_CTL) | 553 VC5_HDMI_SCRAMBLER_CTL_ENABLE); 554 555 queue_delayed_work(system_wq, &vc4_hdmi->scrambling_work, 556 msecs_to_jiffies(SCRAMBLING_POLLING_DELAY_MS)); 557 } 558 559 static void vc4_hdmi_disable_scrambling(struct drm_encoder *encoder) 560 { 561 struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder); 562 struct drm_crtc *crtc = encoder->crtc; 563 564 /* 565 * At boot, encoder->crtc will be NULL. Since we don't know the 566 * state of the scrambler and in order to avoid any 567 * inconsistency, let's disable it all the time. 568 */ 569 if (crtc && !vc4_hdmi_supports_scrambling(encoder, &crtc->mode)) 570 return; 571 572 if (crtc && !vc4_hdmi_mode_needs_scrambling(&crtc->mode)) 573 return; 574 575 if (delayed_work_pending(&vc4_hdmi->scrambling_work)) 576 cancel_delayed_work_sync(&vc4_hdmi->scrambling_work); 577 578 HDMI_WRITE(HDMI_SCRAMBLER_CTL, HDMI_READ(HDMI_SCRAMBLER_CTL) & 579 ~VC5_HDMI_SCRAMBLER_CTL_ENABLE); 580 581 drm_scdc_set_scrambling(vc4_hdmi->ddc, false); 582 drm_scdc_set_high_tmds_clock_ratio(vc4_hdmi->ddc, false); 583 } 584 585 static void vc4_hdmi_scrambling_wq(struct work_struct *work) 586 { 587 struct vc4_hdmi *vc4_hdmi = container_of(to_delayed_work(work), 588 struct vc4_hdmi, 589 scrambling_work); 590 591 if (drm_scdc_get_scrambling_status(vc4_hdmi->ddc)) 592 return; 593 594 drm_scdc_set_high_tmds_clock_ratio(vc4_hdmi->ddc, true); 595 drm_scdc_set_scrambling(vc4_hdmi->ddc, true); 596 597 queue_delayed_work(system_wq, &vc4_hdmi->scrambling_work, 598 msecs_to_jiffies(SCRAMBLING_POLLING_DELAY_MS)); 599 } 600 601 static void vc4_hdmi_encoder_post_crtc_disable(struct drm_encoder *encoder, 602 struct drm_atomic_state *state) 603 { 604 struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder); 605 606 HDMI_WRITE(HDMI_RAM_PACKET_CONFIG, 0); 607 608 HDMI_WRITE(HDMI_VID_CTL, HDMI_READ(HDMI_VID_CTL) | VC4_HD_VID_CTL_CLRRGB); 609 610 mdelay(1); 611 612 HDMI_WRITE(HDMI_VID_CTL, 613 HDMI_READ(HDMI_VID_CTL) & ~VC4_HD_VID_CTL_ENABLE); 614 vc4_hdmi_disable_scrambling(encoder); 615 } 616 617 static void vc4_hdmi_encoder_post_crtc_powerdown(struct drm_encoder *encoder, 618 struct drm_atomic_state *state) 619 { 620 struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder); 621 int ret; 622 623 HDMI_WRITE(HDMI_VID_CTL, 624 HDMI_READ(HDMI_VID_CTL) | VC4_HD_VID_CTL_BLANKPIX); 625 626 if (vc4_hdmi->variant->phy_disable) 627 vc4_hdmi->variant->phy_disable(vc4_hdmi); 628 629 clk_disable_unprepare(vc4_hdmi->pixel_bvb_clock); 630 clk_disable_unprepare(vc4_hdmi->hsm_clock); 631 clk_disable_unprepare(vc4_hdmi->pixel_clock); 632 633 ret = pm_runtime_put(&vc4_hdmi->pdev->dev); 634 if (ret < 0) 635 DRM_ERROR("Failed to release power domain: %d\n", ret); 636 } 637 638 static void vc4_hdmi_encoder_disable(struct drm_encoder *encoder) 639 { 640 } 641 642 static void vc4_hdmi_csc_setup(struct vc4_hdmi *vc4_hdmi, bool enable) 643 { 644 u32 csc_ctl; 645 646 csc_ctl = VC4_SET_FIELD(VC4_HD_CSC_CTL_ORDER_BGR, 647 VC4_HD_CSC_CTL_ORDER); 648 649 if (enable) { 650 /* CEA VICs other than #1 requre limited range RGB 651 * output unless overridden by an AVI infoframe. 652 * Apply a colorspace conversion to squash 0-255 down 653 * to 16-235. The matrix here is: 654 * 655 * [ 0 0 0.8594 16] 656 * [ 0 0.8594 0 16] 657 * [ 0.8594 0 0 16] 658 * [ 0 0 0 1] 659 */ 660 csc_ctl |= VC4_HD_CSC_CTL_ENABLE; 661 csc_ctl |= VC4_HD_CSC_CTL_RGB2YCC; 662 csc_ctl |= VC4_SET_FIELD(VC4_HD_CSC_CTL_MODE_CUSTOM, 663 VC4_HD_CSC_CTL_MODE); 664 665 HDMI_WRITE(HDMI_CSC_12_11, (0x000 << 16) | 0x000); 666 HDMI_WRITE(HDMI_CSC_14_13, (0x100 << 16) | 0x6e0); 667 HDMI_WRITE(HDMI_CSC_22_21, (0x6e0 << 16) | 0x000); 668 HDMI_WRITE(HDMI_CSC_24_23, (0x100 << 16) | 0x000); 669 HDMI_WRITE(HDMI_CSC_32_31, (0x000 << 16) | 0x6e0); 670 HDMI_WRITE(HDMI_CSC_34_33, (0x100 << 16) | 0x000); 671 } 672 673 /* The RGB order applies even when CSC is disabled. */ 674 HDMI_WRITE(HDMI_CSC_CTL, csc_ctl); 675 } 676 677 static void vc5_hdmi_csc_setup(struct vc4_hdmi *vc4_hdmi, bool enable) 678 { 679 u32 csc_ctl; 680 681 csc_ctl = 0x07; /* RGB_CONVERT_MODE = custom matrix, || USE_RGB_TO_YCBCR */ 682 683 if (enable) { 684 /* CEA VICs other than #1 requre limited range RGB 685 * output unless overridden by an AVI infoframe. 686 * Apply a colorspace conversion to squash 0-255 down 687 * to 16-235. The matrix here is: 688 * 689 * [ 0.8594 0 0 16] 690 * [ 0 0.8594 0 16] 691 * [ 0 0 0.8594 16] 692 * [ 0 0 0 1] 693 * Matrix is signed 2p13 fixed point, with signed 9p6 offsets 694 */ 695 HDMI_WRITE(HDMI_CSC_12_11, (0x0000 << 16) | 0x1b80); 696 HDMI_WRITE(HDMI_CSC_14_13, (0x0400 << 16) | 0x0000); 697 HDMI_WRITE(HDMI_CSC_22_21, (0x1b80 << 16) | 0x0000); 698 HDMI_WRITE(HDMI_CSC_24_23, (0x0400 << 16) | 0x0000); 699 HDMI_WRITE(HDMI_CSC_32_31, (0x0000 << 16) | 0x0000); 700 HDMI_WRITE(HDMI_CSC_34_33, (0x0400 << 16) | 0x1b80); 701 } else { 702 /* Still use the matrix for full range, but make it unity. 703 * Matrix is signed 2p13 fixed point, with signed 9p6 offsets 704 */ 705 HDMI_WRITE(HDMI_CSC_12_11, (0x0000 << 16) | 0x2000); 706 HDMI_WRITE(HDMI_CSC_14_13, (0x0000 << 16) | 0x0000); 707 HDMI_WRITE(HDMI_CSC_22_21, (0x2000 << 16) | 0x0000); 708 HDMI_WRITE(HDMI_CSC_24_23, (0x0000 << 16) | 0x0000); 709 HDMI_WRITE(HDMI_CSC_32_31, (0x0000 << 16) | 0x0000); 710 HDMI_WRITE(HDMI_CSC_34_33, (0x0000 << 16) | 0x2000); 711 } 712 713 HDMI_WRITE(HDMI_CSC_CTL, csc_ctl); 714 } 715 716 static void vc4_hdmi_set_timings(struct vc4_hdmi *vc4_hdmi, 717 struct drm_connector_state *state, 718 struct drm_display_mode *mode) 719 { 720 bool hsync_pos = mode->flags & DRM_MODE_FLAG_PHSYNC; 721 bool vsync_pos = mode->flags & DRM_MODE_FLAG_PVSYNC; 722 bool interlaced = mode->flags & DRM_MODE_FLAG_INTERLACE; 723 u32 pixel_rep = (mode->flags & DRM_MODE_FLAG_DBLCLK) ? 2 : 1; 724 u32 verta = (VC4_SET_FIELD(mode->crtc_vsync_end - mode->crtc_vsync_start, 725 VC4_HDMI_VERTA_VSP) | 726 VC4_SET_FIELD(mode->crtc_vsync_start - mode->crtc_vdisplay, 727 VC4_HDMI_VERTA_VFP) | 728 VC4_SET_FIELD(mode->crtc_vdisplay, VC4_HDMI_VERTA_VAL)); 729 u32 vertb = (VC4_SET_FIELD(0, VC4_HDMI_VERTB_VSPO) | 730 VC4_SET_FIELD(mode->crtc_vtotal - mode->crtc_vsync_end, 731 VC4_HDMI_VERTB_VBP)); 732 u32 vertb_even = (VC4_SET_FIELD(0, VC4_HDMI_VERTB_VSPO) | 733 VC4_SET_FIELD(mode->crtc_vtotal - 734 mode->crtc_vsync_end - 735 interlaced, 736 VC4_HDMI_VERTB_VBP)); 737 738 HDMI_WRITE(HDMI_HORZA, 739 (vsync_pos ? VC4_HDMI_HORZA_VPOS : 0) | 740 (hsync_pos ? VC4_HDMI_HORZA_HPOS : 0) | 741 VC4_SET_FIELD(mode->hdisplay * pixel_rep, 742 VC4_HDMI_HORZA_HAP)); 743 744 HDMI_WRITE(HDMI_HORZB, 745 VC4_SET_FIELD((mode->htotal - 746 mode->hsync_end) * pixel_rep, 747 VC4_HDMI_HORZB_HBP) | 748 VC4_SET_FIELD((mode->hsync_end - 749 mode->hsync_start) * pixel_rep, 750 VC4_HDMI_HORZB_HSP) | 751 VC4_SET_FIELD((mode->hsync_start - 752 mode->hdisplay) * pixel_rep, 753 VC4_HDMI_HORZB_HFP)); 754 755 HDMI_WRITE(HDMI_VERTA0, verta); 756 HDMI_WRITE(HDMI_VERTA1, verta); 757 758 HDMI_WRITE(HDMI_VERTB0, vertb_even); 759 HDMI_WRITE(HDMI_VERTB1, vertb); 760 } 761 762 static void vc5_hdmi_set_timings(struct vc4_hdmi *vc4_hdmi, 763 struct drm_connector_state *state, 764 struct drm_display_mode *mode) 765 { 766 bool hsync_pos = mode->flags & DRM_MODE_FLAG_PHSYNC; 767 bool vsync_pos = mode->flags & DRM_MODE_FLAG_PVSYNC; 768 bool interlaced = mode->flags & DRM_MODE_FLAG_INTERLACE; 769 u32 pixel_rep = (mode->flags & DRM_MODE_FLAG_DBLCLK) ? 2 : 1; 770 u32 verta = (VC4_SET_FIELD(mode->crtc_vsync_end - mode->crtc_vsync_start, 771 VC5_HDMI_VERTA_VSP) | 772 VC4_SET_FIELD(mode->crtc_vsync_start - mode->crtc_vdisplay, 773 VC5_HDMI_VERTA_VFP) | 774 VC4_SET_FIELD(mode->crtc_vdisplay, VC5_HDMI_VERTA_VAL)); 775 u32 vertb = (VC4_SET_FIELD(0, VC5_HDMI_VERTB_VSPO) | 776 VC4_SET_FIELD(mode->crtc_vtotal - mode->crtc_vsync_end, 777 VC4_HDMI_VERTB_VBP)); 778 u32 vertb_even = (VC4_SET_FIELD(0, VC5_HDMI_VERTB_VSPO) | 779 VC4_SET_FIELD(mode->crtc_vtotal - 780 mode->crtc_vsync_end - 781 interlaced, 782 VC4_HDMI_VERTB_VBP)); 783 unsigned char gcp; 784 bool gcp_en; 785 u32 reg; 786 787 HDMI_WRITE(HDMI_VEC_INTERFACE_XBAR, 0x354021); 788 HDMI_WRITE(HDMI_HORZA, 789 (vsync_pos ? VC5_HDMI_HORZA_VPOS : 0) | 790 (hsync_pos ? VC5_HDMI_HORZA_HPOS : 0) | 791 VC4_SET_FIELD(mode->hdisplay * pixel_rep, 792 VC5_HDMI_HORZA_HAP) | 793 VC4_SET_FIELD((mode->hsync_start - 794 mode->hdisplay) * pixel_rep, 795 VC5_HDMI_HORZA_HFP)); 796 797 HDMI_WRITE(HDMI_HORZB, 798 VC4_SET_FIELD((mode->htotal - 799 mode->hsync_end) * pixel_rep, 800 VC5_HDMI_HORZB_HBP) | 801 VC4_SET_FIELD((mode->hsync_end - 802 mode->hsync_start) * pixel_rep, 803 VC5_HDMI_HORZB_HSP)); 804 805 HDMI_WRITE(HDMI_VERTA0, verta); 806 HDMI_WRITE(HDMI_VERTA1, verta); 807 808 HDMI_WRITE(HDMI_VERTB0, vertb_even); 809 HDMI_WRITE(HDMI_VERTB1, vertb); 810 811 switch (state->max_bpc) { 812 case 12: 813 gcp = 6; 814 gcp_en = true; 815 break; 816 case 10: 817 gcp = 5; 818 gcp_en = true; 819 break; 820 case 8: 821 default: 822 gcp = 4; 823 gcp_en = false; 824 break; 825 } 826 827 reg = HDMI_READ(HDMI_DEEP_COLOR_CONFIG_1); 828 reg &= ~(VC5_HDMI_DEEP_COLOR_CONFIG_1_INIT_PACK_PHASE_MASK | 829 VC5_HDMI_DEEP_COLOR_CONFIG_1_COLOR_DEPTH_MASK); 830 reg |= VC4_SET_FIELD(2, VC5_HDMI_DEEP_COLOR_CONFIG_1_INIT_PACK_PHASE) | 831 VC4_SET_FIELD(gcp, VC5_HDMI_DEEP_COLOR_CONFIG_1_COLOR_DEPTH); 832 HDMI_WRITE(HDMI_DEEP_COLOR_CONFIG_1, reg); 833 834 reg = HDMI_READ(HDMI_GCP_WORD_1); 835 reg &= ~VC5_HDMI_GCP_WORD_1_GCP_SUBPACKET_BYTE_1_MASK; 836 reg |= VC4_SET_FIELD(gcp, VC5_HDMI_GCP_WORD_1_GCP_SUBPACKET_BYTE_1); 837 HDMI_WRITE(HDMI_GCP_WORD_1, reg); 838 839 reg = HDMI_READ(HDMI_GCP_CONFIG); 840 reg &= ~VC5_HDMI_GCP_CONFIG_GCP_ENABLE; 841 reg |= gcp_en ? VC5_HDMI_GCP_CONFIG_GCP_ENABLE : 0; 842 HDMI_WRITE(HDMI_GCP_CONFIG, reg); 843 844 HDMI_WRITE(HDMI_CLOCK_STOP, 0); 845 } 846 847 static void vc4_hdmi_recenter_fifo(struct vc4_hdmi *vc4_hdmi) 848 { 849 u32 drift; 850 int ret; 851 852 drift = HDMI_READ(HDMI_FIFO_CTL); 853 drift &= VC4_HDMI_FIFO_VALID_WRITE_MASK; 854 855 HDMI_WRITE(HDMI_FIFO_CTL, 856 drift & ~VC4_HDMI_FIFO_CTL_RECENTER); 857 HDMI_WRITE(HDMI_FIFO_CTL, 858 drift | VC4_HDMI_FIFO_CTL_RECENTER); 859 usleep_range(1000, 1100); 860 HDMI_WRITE(HDMI_FIFO_CTL, 861 drift & ~VC4_HDMI_FIFO_CTL_RECENTER); 862 HDMI_WRITE(HDMI_FIFO_CTL, 863 drift | VC4_HDMI_FIFO_CTL_RECENTER); 864 865 ret = wait_for(HDMI_READ(HDMI_FIFO_CTL) & 866 VC4_HDMI_FIFO_CTL_RECENTER_DONE, 1); 867 WARN_ONCE(ret, "Timeout waiting for " 868 "VC4_HDMI_FIFO_CTL_RECENTER_DONE"); 869 } 870 871 static struct drm_connector_state * 872 vc4_hdmi_encoder_get_connector_state(struct drm_encoder *encoder, 873 struct drm_atomic_state *state) 874 { 875 struct drm_connector_state *conn_state; 876 struct drm_connector *connector; 877 unsigned int i; 878 879 for_each_new_connector_in_state(state, connector, conn_state, i) { 880 if (conn_state->best_encoder == encoder) 881 return conn_state; 882 } 883 884 return NULL; 885 } 886 887 static void vc4_hdmi_encoder_pre_crtc_configure(struct drm_encoder *encoder, 888 struct drm_atomic_state *state) 889 { 890 struct drm_connector_state *conn_state = 891 vc4_hdmi_encoder_get_connector_state(encoder, state); 892 struct vc4_hdmi_connector_state *vc4_conn_state = 893 conn_state_to_vc4_hdmi_conn_state(conn_state); 894 struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode; 895 struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder); 896 unsigned long bvb_rate, pixel_rate, hsm_rate; 897 int ret; 898 899 ret = pm_runtime_resume_and_get(&vc4_hdmi->pdev->dev); 900 if (ret < 0) { 901 DRM_ERROR("Failed to retain power domain: %d\n", ret); 902 return; 903 } 904 905 pixel_rate = vc4_conn_state->pixel_rate; 906 ret = clk_set_rate(vc4_hdmi->pixel_clock, pixel_rate); 907 if (ret) { 908 DRM_ERROR("Failed to set pixel clock rate: %d\n", ret); 909 return; 910 } 911 912 ret = clk_prepare_enable(vc4_hdmi->pixel_clock); 913 if (ret) { 914 DRM_ERROR("Failed to turn on pixel clock: %d\n", ret); 915 return; 916 } 917 918 /* 919 * As stated in RPi's vc4 firmware "HDMI state machine (HSM) clock must 920 * be faster than pixel clock, infinitesimally faster, tested in 921 * simulation. Otherwise, exact value is unimportant for HDMI 922 * operation." This conflicts with bcm2835's vc4 documentation, which 923 * states HSM's clock has to be at least 108% of the pixel clock. 924 * 925 * Real life tests reveal that vc4's firmware statement holds up, and 926 * users are able to use pixel clocks closer to HSM's, namely for 927 * 1920x1200@60Hz. So it was decided to have leave a 1% margin between 928 * both clocks. Which, for RPi0-3 implies a maximum pixel clock of 929 * 162MHz. 930 * 931 * Additionally, the AXI clock needs to be at least 25% of 932 * pixel clock, but HSM ends up being the limiting factor. 933 */ 934 hsm_rate = max_t(unsigned long, 120000000, (pixel_rate / 100) * 101); 935 ret = clk_set_min_rate(vc4_hdmi->hsm_clock, hsm_rate); 936 if (ret) { 937 DRM_ERROR("Failed to set HSM clock rate: %d\n", ret); 938 return; 939 } 940 941 ret = clk_prepare_enable(vc4_hdmi->hsm_clock); 942 if (ret) { 943 DRM_ERROR("Failed to turn on HSM clock: %d\n", ret); 944 clk_disable_unprepare(vc4_hdmi->pixel_clock); 945 return; 946 } 947 948 vc4_hdmi_cec_update_clk_div(vc4_hdmi); 949 950 if (pixel_rate > 297000000) 951 bvb_rate = 300000000; 952 else if (pixel_rate > 148500000) 953 bvb_rate = 150000000; 954 else 955 bvb_rate = 75000000; 956 957 ret = clk_set_min_rate(vc4_hdmi->pixel_bvb_clock, bvb_rate); 958 if (ret) { 959 DRM_ERROR("Failed to set pixel bvb clock rate: %d\n", ret); 960 clk_disable_unprepare(vc4_hdmi->hsm_clock); 961 clk_disable_unprepare(vc4_hdmi->pixel_clock); 962 return; 963 } 964 965 ret = clk_prepare_enable(vc4_hdmi->pixel_bvb_clock); 966 if (ret) { 967 DRM_ERROR("Failed to turn on pixel bvb clock: %d\n", ret); 968 clk_disable_unprepare(vc4_hdmi->hsm_clock); 969 clk_disable_unprepare(vc4_hdmi->pixel_clock); 970 return; 971 } 972 973 if (vc4_hdmi->variant->phy_init) 974 vc4_hdmi->variant->phy_init(vc4_hdmi, vc4_conn_state); 975 976 HDMI_WRITE(HDMI_SCHEDULER_CONTROL, 977 HDMI_READ(HDMI_SCHEDULER_CONTROL) | 978 VC4_HDMI_SCHEDULER_CONTROL_MANUAL_FORMAT | 979 VC4_HDMI_SCHEDULER_CONTROL_IGNORE_VSYNC_PREDICTS); 980 981 if (vc4_hdmi->variant->set_timings) 982 vc4_hdmi->variant->set_timings(vc4_hdmi, conn_state, mode); 983 } 984 985 static void vc4_hdmi_encoder_pre_crtc_enable(struct drm_encoder *encoder, 986 struct drm_atomic_state *state) 987 { 988 struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode; 989 struct vc4_hdmi_encoder *vc4_encoder = to_vc4_hdmi_encoder(encoder); 990 struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder); 991 992 if (vc4_encoder->hdmi_monitor && 993 drm_default_rgb_quant_range(mode) == HDMI_QUANTIZATION_RANGE_LIMITED) { 994 if (vc4_hdmi->variant->csc_setup) 995 vc4_hdmi->variant->csc_setup(vc4_hdmi, true); 996 997 vc4_encoder->limited_rgb_range = true; 998 } else { 999 if (vc4_hdmi->variant->csc_setup) 1000 vc4_hdmi->variant->csc_setup(vc4_hdmi, false); 1001 1002 vc4_encoder->limited_rgb_range = false; 1003 } 1004 1005 HDMI_WRITE(HDMI_FIFO_CTL, VC4_HDMI_FIFO_CTL_MASTER_SLAVE_N); 1006 } 1007 1008 static void vc4_hdmi_encoder_post_crtc_enable(struct drm_encoder *encoder, 1009 struct drm_atomic_state *state) 1010 { 1011 struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode; 1012 struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder); 1013 struct vc4_hdmi_encoder *vc4_encoder = to_vc4_hdmi_encoder(encoder); 1014 bool hsync_pos = mode->flags & DRM_MODE_FLAG_PHSYNC; 1015 bool vsync_pos = mode->flags & DRM_MODE_FLAG_PVSYNC; 1016 int ret; 1017 1018 HDMI_WRITE(HDMI_VID_CTL, 1019 VC4_HD_VID_CTL_ENABLE | 1020 VC4_HD_VID_CTL_CLRRGB | 1021 VC4_HD_VID_CTL_UNDERFLOW_ENABLE | 1022 VC4_HD_VID_CTL_FRAME_COUNTER_RESET | 1023 (vsync_pos ? 0 : VC4_HD_VID_CTL_VSYNC_LOW) | 1024 (hsync_pos ? 0 : VC4_HD_VID_CTL_HSYNC_LOW)); 1025 1026 HDMI_WRITE(HDMI_VID_CTL, 1027 HDMI_READ(HDMI_VID_CTL) & ~VC4_HD_VID_CTL_BLANKPIX); 1028 1029 if (vc4_encoder->hdmi_monitor) { 1030 HDMI_WRITE(HDMI_SCHEDULER_CONTROL, 1031 HDMI_READ(HDMI_SCHEDULER_CONTROL) | 1032 VC4_HDMI_SCHEDULER_CONTROL_MODE_HDMI); 1033 1034 ret = wait_for(HDMI_READ(HDMI_SCHEDULER_CONTROL) & 1035 VC4_HDMI_SCHEDULER_CONTROL_HDMI_ACTIVE, 1000); 1036 WARN_ONCE(ret, "Timeout waiting for " 1037 "VC4_HDMI_SCHEDULER_CONTROL_HDMI_ACTIVE\n"); 1038 } else { 1039 HDMI_WRITE(HDMI_RAM_PACKET_CONFIG, 1040 HDMI_READ(HDMI_RAM_PACKET_CONFIG) & 1041 ~(VC4_HDMI_RAM_PACKET_ENABLE)); 1042 HDMI_WRITE(HDMI_SCHEDULER_CONTROL, 1043 HDMI_READ(HDMI_SCHEDULER_CONTROL) & 1044 ~VC4_HDMI_SCHEDULER_CONTROL_MODE_HDMI); 1045 1046 ret = wait_for(!(HDMI_READ(HDMI_SCHEDULER_CONTROL) & 1047 VC4_HDMI_SCHEDULER_CONTROL_HDMI_ACTIVE), 1000); 1048 WARN_ONCE(ret, "Timeout waiting for " 1049 "!VC4_HDMI_SCHEDULER_CONTROL_HDMI_ACTIVE\n"); 1050 } 1051 1052 if (vc4_encoder->hdmi_monitor) { 1053 WARN_ON(!(HDMI_READ(HDMI_SCHEDULER_CONTROL) & 1054 VC4_HDMI_SCHEDULER_CONTROL_HDMI_ACTIVE)); 1055 HDMI_WRITE(HDMI_SCHEDULER_CONTROL, 1056 HDMI_READ(HDMI_SCHEDULER_CONTROL) | 1057 VC4_HDMI_SCHEDULER_CONTROL_VERT_ALWAYS_KEEPOUT); 1058 1059 HDMI_WRITE(HDMI_RAM_PACKET_CONFIG, 1060 VC4_HDMI_RAM_PACKET_ENABLE); 1061 1062 vc4_hdmi_set_infoframes(encoder); 1063 } 1064 1065 vc4_hdmi_recenter_fifo(vc4_hdmi); 1066 vc4_hdmi_enable_scrambling(encoder); 1067 } 1068 1069 static void vc4_hdmi_encoder_enable(struct drm_encoder *encoder) 1070 { 1071 } 1072 1073 #define WIFI_2_4GHz_CH1_MIN_FREQ 2400000000ULL 1074 #define WIFI_2_4GHz_CH1_MAX_FREQ 2422000000ULL 1075 1076 static int vc4_hdmi_encoder_atomic_check(struct drm_encoder *encoder, 1077 struct drm_crtc_state *crtc_state, 1078 struct drm_connector_state *conn_state) 1079 { 1080 struct vc4_hdmi_connector_state *vc4_state = conn_state_to_vc4_hdmi_conn_state(conn_state); 1081 struct drm_display_mode *mode = &crtc_state->adjusted_mode; 1082 struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder); 1083 unsigned long long pixel_rate = mode->clock * 1000; 1084 unsigned long long tmds_rate; 1085 1086 if (vc4_hdmi->variant->unsupported_odd_h_timings && 1087 ((mode->hdisplay % 2) || (mode->hsync_start % 2) || 1088 (mode->hsync_end % 2) || (mode->htotal % 2))) 1089 return -EINVAL; 1090 1091 /* 1092 * The 1440p@60 pixel rate is in the same range than the first 1093 * WiFi channel (between 2.4GHz and 2.422GHz with 22MHz 1094 * bandwidth). Slightly lower the frequency to bring it out of 1095 * the WiFi range. 1096 */ 1097 tmds_rate = pixel_rate * 10; 1098 if (vc4_hdmi->disable_wifi_frequencies && 1099 (tmds_rate >= WIFI_2_4GHz_CH1_MIN_FREQ && 1100 tmds_rate <= WIFI_2_4GHz_CH1_MAX_FREQ)) { 1101 mode->clock = 238560; 1102 pixel_rate = mode->clock * 1000; 1103 } 1104 1105 if (conn_state->max_bpc == 12) { 1106 pixel_rate = pixel_rate * 150; 1107 do_div(pixel_rate, 100); 1108 } else if (conn_state->max_bpc == 10) { 1109 pixel_rate = pixel_rate * 125; 1110 do_div(pixel_rate, 100); 1111 } 1112 1113 if (mode->flags & DRM_MODE_FLAG_DBLCLK) 1114 pixel_rate = pixel_rate * 2; 1115 1116 if (pixel_rate > vc4_hdmi->variant->max_pixel_clock) 1117 return -EINVAL; 1118 1119 if (vc4_hdmi->disable_4kp60 && (pixel_rate > HDMI_14_MAX_TMDS_CLK)) 1120 return -EINVAL; 1121 1122 vc4_state->pixel_rate = pixel_rate; 1123 1124 return 0; 1125 } 1126 1127 static enum drm_mode_status 1128 vc4_hdmi_encoder_mode_valid(struct drm_encoder *encoder, 1129 const struct drm_display_mode *mode) 1130 { 1131 struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder); 1132 1133 if (vc4_hdmi->variant->unsupported_odd_h_timings && 1134 ((mode->hdisplay % 2) || (mode->hsync_start % 2) || 1135 (mode->hsync_end % 2) || (mode->htotal % 2))) 1136 return MODE_H_ILLEGAL; 1137 1138 if ((mode->clock * 1000) > vc4_hdmi->variant->max_pixel_clock) 1139 return MODE_CLOCK_HIGH; 1140 1141 if (vc4_hdmi->disable_4kp60 && vc4_hdmi_mode_needs_scrambling(mode)) 1142 return MODE_CLOCK_HIGH; 1143 1144 return MODE_OK; 1145 } 1146 1147 static const struct drm_encoder_helper_funcs vc4_hdmi_encoder_helper_funcs = { 1148 .atomic_check = vc4_hdmi_encoder_atomic_check, 1149 .mode_valid = vc4_hdmi_encoder_mode_valid, 1150 .disable = vc4_hdmi_encoder_disable, 1151 .enable = vc4_hdmi_encoder_enable, 1152 }; 1153 1154 static u32 vc4_hdmi_channel_map(struct vc4_hdmi *vc4_hdmi, u32 channel_mask) 1155 { 1156 int i; 1157 u32 channel_map = 0; 1158 1159 for (i = 0; i < 8; i++) { 1160 if (channel_mask & BIT(i)) 1161 channel_map |= i << (3 * i); 1162 } 1163 return channel_map; 1164 } 1165 1166 static u32 vc5_hdmi_channel_map(struct vc4_hdmi *vc4_hdmi, u32 channel_mask) 1167 { 1168 int i; 1169 u32 channel_map = 0; 1170 1171 for (i = 0; i < 8; i++) { 1172 if (channel_mask & BIT(i)) 1173 channel_map |= i << (4 * i); 1174 } 1175 return channel_map; 1176 } 1177 1178 /* HDMI audio codec callbacks */ 1179 static void vc4_hdmi_audio_set_mai_clock(struct vc4_hdmi *vc4_hdmi, 1180 unsigned int samplerate) 1181 { 1182 u32 hsm_clock = clk_get_rate(vc4_hdmi->audio_clock); 1183 unsigned long n, m; 1184 1185 rational_best_approximation(hsm_clock, samplerate, 1186 VC4_HD_MAI_SMP_N_MASK >> 1187 VC4_HD_MAI_SMP_N_SHIFT, 1188 (VC4_HD_MAI_SMP_M_MASK >> 1189 VC4_HD_MAI_SMP_M_SHIFT) + 1, 1190 &n, &m); 1191 1192 HDMI_WRITE(HDMI_MAI_SMP, 1193 VC4_SET_FIELD(n, VC4_HD_MAI_SMP_N) | 1194 VC4_SET_FIELD(m - 1, VC4_HD_MAI_SMP_M)); 1195 } 1196 1197 static void vc4_hdmi_set_n_cts(struct vc4_hdmi *vc4_hdmi, unsigned int samplerate) 1198 { 1199 struct drm_encoder *encoder = &vc4_hdmi->encoder.base.base; 1200 struct drm_crtc *crtc = encoder->crtc; 1201 const struct drm_display_mode *mode = &crtc->state->adjusted_mode; 1202 u32 n, cts; 1203 u64 tmp; 1204 1205 n = 128 * samplerate / 1000; 1206 tmp = (u64)(mode->clock * 1000) * n; 1207 do_div(tmp, 128 * samplerate); 1208 cts = tmp; 1209 1210 HDMI_WRITE(HDMI_CRP_CFG, 1211 VC4_HDMI_CRP_CFG_EXTERNAL_CTS_EN | 1212 VC4_SET_FIELD(n, VC4_HDMI_CRP_CFG_N)); 1213 1214 /* 1215 * We could get slightly more accurate clocks in some cases by 1216 * providing a CTS_1 value. The two CTS values are alternated 1217 * between based on the period fields 1218 */ 1219 HDMI_WRITE(HDMI_CTS_0, cts); 1220 HDMI_WRITE(HDMI_CTS_1, cts); 1221 } 1222 1223 static inline struct vc4_hdmi *dai_to_hdmi(struct snd_soc_dai *dai) 1224 { 1225 struct snd_soc_card *card = snd_soc_dai_get_drvdata(dai); 1226 1227 return snd_soc_card_get_drvdata(card); 1228 } 1229 1230 static int vc4_hdmi_audio_startup(struct device *dev, void *data) 1231 { 1232 struct vc4_hdmi *vc4_hdmi = dev_get_drvdata(dev); 1233 struct drm_encoder *encoder = &vc4_hdmi->encoder.base.base; 1234 1235 /* 1236 * If the HDMI encoder hasn't probed, or the encoder is 1237 * currently in DVI mode, treat the codec dai as missing. 1238 */ 1239 if (!encoder->crtc || !(HDMI_READ(HDMI_RAM_PACKET_CONFIG) & 1240 VC4_HDMI_RAM_PACKET_ENABLE)) 1241 return -ENODEV; 1242 1243 vc4_hdmi->audio.streaming = true; 1244 1245 HDMI_WRITE(HDMI_MAI_CTL, 1246 VC4_HD_MAI_CTL_RESET | 1247 VC4_HD_MAI_CTL_FLUSH | 1248 VC4_HD_MAI_CTL_DLATE | 1249 VC4_HD_MAI_CTL_ERRORE | 1250 VC4_HD_MAI_CTL_ERRORF); 1251 1252 if (vc4_hdmi->variant->phy_rng_enable) 1253 vc4_hdmi->variant->phy_rng_enable(vc4_hdmi); 1254 1255 return 0; 1256 } 1257 1258 static void vc4_hdmi_audio_reset(struct vc4_hdmi *vc4_hdmi) 1259 { 1260 struct drm_encoder *encoder = &vc4_hdmi->encoder.base.base; 1261 struct device *dev = &vc4_hdmi->pdev->dev; 1262 int ret; 1263 1264 vc4_hdmi->audio.streaming = false; 1265 ret = vc4_hdmi_stop_packet(encoder, HDMI_INFOFRAME_TYPE_AUDIO, false); 1266 if (ret) 1267 dev_err(dev, "Failed to stop audio infoframe: %d\n", ret); 1268 1269 HDMI_WRITE(HDMI_MAI_CTL, VC4_HD_MAI_CTL_RESET); 1270 HDMI_WRITE(HDMI_MAI_CTL, VC4_HD_MAI_CTL_ERRORF); 1271 HDMI_WRITE(HDMI_MAI_CTL, VC4_HD_MAI_CTL_FLUSH); 1272 } 1273 1274 static void vc4_hdmi_audio_shutdown(struct device *dev, void *data) 1275 { 1276 struct vc4_hdmi *vc4_hdmi = dev_get_drvdata(dev); 1277 1278 HDMI_WRITE(HDMI_MAI_CTL, 1279 VC4_HD_MAI_CTL_DLATE | 1280 VC4_HD_MAI_CTL_ERRORE | 1281 VC4_HD_MAI_CTL_ERRORF); 1282 1283 if (vc4_hdmi->variant->phy_rng_disable) 1284 vc4_hdmi->variant->phy_rng_disable(vc4_hdmi); 1285 1286 vc4_hdmi->audio.streaming = false; 1287 vc4_hdmi_audio_reset(vc4_hdmi); 1288 } 1289 1290 static int sample_rate_to_mai_fmt(int samplerate) 1291 { 1292 switch (samplerate) { 1293 case 8000: 1294 return VC4_HDMI_MAI_SAMPLE_RATE_8000; 1295 case 11025: 1296 return VC4_HDMI_MAI_SAMPLE_RATE_11025; 1297 case 12000: 1298 return VC4_HDMI_MAI_SAMPLE_RATE_12000; 1299 case 16000: 1300 return VC4_HDMI_MAI_SAMPLE_RATE_16000; 1301 case 22050: 1302 return VC4_HDMI_MAI_SAMPLE_RATE_22050; 1303 case 24000: 1304 return VC4_HDMI_MAI_SAMPLE_RATE_24000; 1305 case 32000: 1306 return VC4_HDMI_MAI_SAMPLE_RATE_32000; 1307 case 44100: 1308 return VC4_HDMI_MAI_SAMPLE_RATE_44100; 1309 case 48000: 1310 return VC4_HDMI_MAI_SAMPLE_RATE_48000; 1311 case 64000: 1312 return VC4_HDMI_MAI_SAMPLE_RATE_64000; 1313 case 88200: 1314 return VC4_HDMI_MAI_SAMPLE_RATE_88200; 1315 case 96000: 1316 return VC4_HDMI_MAI_SAMPLE_RATE_96000; 1317 case 128000: 1318 return VC4_HDMI_MAI_SAMPLE_RATE_128000; 1319 case 176400: 1320 return VC4_HDMI_MAI_SAMPLE_RATE_176400; 1321 case 192000: 1322 return VC4_HDMI_MAI_SAMPLE_RATE_192000; 1323 default: 1324 return VC4_HDMI_MAI_SAMPLE_RATE_NOT_INDICATED; 1325 } 1326 } 1327 1328 /* HDMI audio codec callbacks */ 1329 static int vc4_hdmi_audio_prepare(struct device *dev, void *data, 1330 struct hdmi_codec_daifmt *daifmt, 1331 struct hdmi_codec_params *params) 1332 { 1333 struct vc4_hdmi *vc4_hdmi = dev_get_drvdata(dev); 1334 struct drm_encoder *encoder = &vc4_hdmi->encoder.base.base; 1335 unsigned int sample_rate = params->sample_rate; 1336 unsigned int channels = params->channels; 1337 u32 audio_packet_config, channel_mask; 1338 u32 channel_map; 1339 u32 mai_audio_format; 1340 u32 mai_sample_rate; 1341 1342 dev_dbg(dev, "%s: %u Hz, %d bit, %d channels\n", __func__, 1343 sample_rate, params->sample_width, channels); 1344 1345 HDMI_WRITE(HDMI_MAI_CTL, 1346 VC4_SET_FIELD(channels, VC4_HD_MAI_CTL_CHNUM) | 1347 VC4_HD_MAI_CTL_WHOLSMP | 1348 VC4_HD_MAI_CTL_CHALIGN | 1349 VC4_HD_MAI_CTL_ENABLE); 1350 1351 vc4_hdmi_audio_set_mai_clock(vc4_hdmi, sample_rate); 1352 1353 mai_sample_rate = sample_rate_to_mai_fmt(sample_rate); 1354 if (params->iec.status[0] & IEC958_AES0_NONAUDIO && 1355 params->channels == 8) 1356 mai_audio_format = VC4_HDMI_MAI_FORMAT_HBR; 1357 else 1358 mai_audio_format = VC4_HDMI_MAI_FORMAT_PCM; 1359 HDMI_WRITE(HDMI_MAI_FMT, 1360 VC4_SET_FIELD(mai_sample_rate, 1361 VC4_HDMI_MAI_FORMAT_SAMPLE_RATE) | 1362 VC4_SET_FIELD(mai_audio_format, 1363 VC4_HDMI_MAI_FORMAT_AUDIO_FORMAT)); 1364 1365 /* The B frame identifier should match the value used by alsa-lib (8) */ 1366 audio_packet_config = 1367 VC4_HDMI_AUDIO_PACKET_ZERO_DATA_ON_SAMPLE_FLAT | 1368 VC4_HDMI_AUDIO_PACKET_ZERO_DATA_ON_INACTIVE_CHANNELS | 1369 VC4_SET_FIELD(0x8, VC4_HDMI_AUDIO_PACKET_B_FRAME_IDENTIFIER); 1370 1371 channel_mask = GENMASK(channels - 1, 0); 1372 audio_packet_config |= VC4_SET_FIELD(channel_mask, 1373 VC4_HDMI_AUDIO_PACKET_CEA_MASK); 1374 1375 /* Set the MAI threshold */ 1376 HDMI_WRITE(HDMI_MAI_THR, 1377 VC4_SET_FIELD(0x10, VC4_HD_MAI_THR_PANICHIGH) | 1378 VC4_SET_FIELD(0x10, VC4_HD_MAI_THR_PANICLOW) | 1379 VC4_SET_FIELD(0x10, VC4_HD_MAI_THR_DREQHIGH) | 1380 VC4_SET_FIELD(0x10, VC4_HD_MAI_THR_DREQLOW)); 1381 1382 HDMI_WRITE(HDMI_MAI_CONFIG, 1383 VC4_HDMI_MAI_CONFIG_BIT_REVERSE | 1384 VC4_HDMI_MAI_CONFIG_FORMAT_REVERSE | 1385 VC4_SET_FIELD(channel_mask, VC4_HDMI_MAI_CHANNEL_MASK)); 1386 1387 channel_map = vc4_hdmi->variant->channel_map(vc4_hdmi, channel_mask); 1388 HDMI_WRITE(HDMI_MAI_CHANNEL_MAP, channel_map); 1389 HDMI_WRITE(HDMI_AUDIO_PACKET_CONFIG, audio_packet_config); 1390 vc4_hdmi_set_n_cts(vc4_hdmi, sample_rate); 1391 1392 memcpy(&vc4_hdmi->audio.infoframe, ¶ms->cea, sizeof(params->cea)); 1393 vc4_hdmi_set_audio_infoframe(encoder); 1394 1395 return 0; 1396 } 1397 1398 static const struct snd_soc_component_driver vc4_hdmi_audio_cpu_dai_comp = { 1399 .name = "vc4-hdmi-cpu-dai-component", 1400 }; 1401 1402 static int vc4_hdmi_audio_cpu_dai_probe(struct snd_soc_dai *dai) 1403 { 1404 struct vc4_hdmi *vc4_hdmi = dai_to_hdmi(dai); 1405 1406 snd_soc_dai_init_dma_data(dai, &vc4_hdmi->audio.dma_data, NULL); 1407 1408 return 0; 1409 } 1410 1411 static struct snd_soc_dai_driver vc4_hdmi_audio_cpu_dai_drv = { 1412 .name = "vc4-hdmi-cpu-dai", 1413 .probe = vc4_hdmi_audio_cpu_dai_probe, 1414 .playback = { 1415 .stream_name = "Playback", 1416 .channels_min = 1, 1417 .channels_max = 8, 1418 .rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | 1419 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | 1420 SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | 1421 SNDRV_PCM_RATE_192000, 1422 .formats = SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE, 1423 }, 1424 }; 1425 1426 static const struct snd_dmaengine_pcm_config pcm_conf = { 1427 .chan_names[SNDRV_PCM_STREAM_PLAYBACK] = "audio-rx", 1428 .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config, 1429 }; 1430 1431 static int vc4_hdmi_audio_get_eld(struct device *dev, void *data, 1432 uint8_t *buf, size_t len) 1433 { 1434 struct vc4_hdmi *vc4_hdmi = dev_get_drvdata(dev); 1435 struct drm_connector *connector = &vc4_hdmi->connector; 1436 1437 memcpy(buf, connector->eld, min(sizeof(connector->eld), len)); 1438 1439 return 0; 1440 } 1441 1442 static const struct hdmi_codec_ops vc4_hdmi_codec_ops = { 1443 .get_eld = vc4_hdmi_audio_get_eld, 1444 .prepare = vc4_hdmi_audio_prepare, 1445 .audio_shutdown = vc4_hdmi_audio_shutdown, 1446 .audio_startup = vc4_hdmi_audio_startup, 1447 }; 1448 1449 static struct hdmi_codec_pdata vc4_hdmi_codec_pdata = { 1450 .ops = &vc4_hdmi_codec_ops, 1451 .max_i2s_channels = 8, 1452 .i2s = 1, 1453 }; 1454 1455 static int vc4_hdmi_audio_init(struct vc4_hdmi *vc4_hdmi) 1456 { 1457 const struct vc4_hdmi_register *mai_data = 1458 &vc4_hdmi->variant->registers[HDMI_MAI_DATA]; 1459 struct snd_soc_dai_link *dai_link = &vc4_hdmi->audio.link; 1460 struct snd_soc_card *card = &vc4_hdmi->audio.card; 1461 struct device *dev = &vc4_hdmi->pdev->dev; 1462 struct platform_device *codec_pdev; 1463 const __be32 *addr; 1464 int index; 1465 int ret; 1466 1467 if (!of_find_property(dev->of_node, "dmas", NULL)) { 1468 dev_warn(dev, 1469 "'dmas' DT property is missing, no HDMI audio\n"); 1470 return 0; 1471 } 1472 1473 if (mai_data->reg != VC4_HD) { 1474 WARN_ONCE(true, "MAI isn't in the HD block\n"); 1475 return -EINVAL; 1476 } 1477 1478 /* 1479 * Get the physical address of VC4_HD_MAI_DATA. We need to retrieve 1480 * the bus address specified in the DT, because the physical address 1481 * (the one returned by platform_get_resource()) is not appropriate 1482 * for DMA transfers. 1483 * This VC/MMU should probably be exposed to avoid this kind of hacks. 1484 */ 1485 index = of_property_match_string(dev->of_node, "reg-names", "hd"); 1486 /* Before BCM2711, we don't have a named register range */ 1487 if (index < 0) 1488 index = 1; 1489 1490 addr = of_get_address(dev->of_node, index, NULL, NULL); 1491 1492 vc4_hdmi->audio.dma_data.addr = be32_to_cpup(addr) + mai_data->offset; 1493 vc4_hdmi->audio.dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; 1494 vc4_hdmi->audio.dma_data.maxburst = 2; 1495 1496 ret = devm_snd_dmaengine_pcm_register(dev, &pcm_conf, 0); 1497 if (ret) { 1498 dev_err(dev, "Could not register PCM component: %d\n", ret); 1499 return ret; 1500 } 1501 1502 ret = devm_snd_soc_register_component(dev, &vc4_hdmi_audio_cpu_dai_comp, 1503 &vc4_hdmi_audio_cpu_dai_drv, 1); 1504 if (ret) { 1505 dev_err(dev, "Could not register CPU DAI: %d\n", ret); 1506 return ret; 1507 } 1508 1509 codec_pdev = platform_device_register_data(dev, HDMI_CODEC_DRV_NAME, 1510 PLATFORM_DEVID_AUTO, 1511 &vc4_hdmi_codec_pdata, 1512 sizeof(vc4_hdmi_codec_pdata)); 1513 if (IS_ERR(codec_pdev)) { 1514 dev_err(dev, "Couldn't register the HDMI codec: %ld\n", PTR_ERR(codec_pdev)); 1515 return PTR_ERR(codec_pdev); 1516 } 1517 1518 dai_link->cpus = &vc4_hdmi->audio.cpu; 1519 dai_link->codecs = &vc4_hdmi->audio.codec; 1520 dai_link->platforms = &vc4_hdmi->audio.platform; 1521 1522 dai_link->num_cpus = 1; 1523 dai_link->num_codecs = 1; 1524 dai_link->num_platforms = 1; 1525 1526 dai_link->name = "MAI"; 1527 dai_link->stream_name = "MAI PCM"; 1528 dai_link->codecs->dai_name = "i2s-hifi"; 1529 dai_link->cpus->dai_name = dev_name(dev); 1530 dai_link->codecs->name = dev_name(&codec_pdev->dev); 1531 dai_link->platforms->name = dev_name(dev); 1532 1533 card->dai_link = dai_link; 1534 card->num_links = 1; 1535 card->name = vc4_hdmi->variant->card_name; 1536 card->driver_name = "vc4-hdmi"; 1537 card->dev = dev; 1538 card->owner = THIS_MODULE; 1539 1540 /* 1541 * Be careful, snd_soc_register_card() calls dev_set_drvdata() and 1542 * stores a pointer to the snd card object in dev->driver_data. This 1543 * means we cannot use it for something else. The hdmi back-pointer is 1544 * now stored in card->drvdata and should be retrieved with 1545 * snd_soc_card_get_drvdata() if needed. 1546 */ 1547 snd_soc_card_set_drvdata(card, vc4_hdmi); 1548 ret = devm_snd_soc_register_card(dev, card); 1549 if (ret) 1550 dev_err_probe(dev, ret, "Could not register sound card\n"); 1551 1552 return ret; 1553 1554 } 1555 1556 static irqreturn_t vc4_hdmi_hpd_irq_thread(int irq, void *priv) 1557 { 1558 struct vc4_hdmi *vc4_hdmi = priv; 1559 struct drm_device *dev = vc4_hdmi->connector.dev; 1560 1561 if (dev && dev->registered) 1562 drm_kms_helper_hotplug_event(dev); 1563 1564 return IRQ_HANDLED; 1565 } 1566 1567 static int vc4_hdmi_hotplug_init(struct vc4_hdmi *vc4_hdmi) 1568 { 1569 struct drm_connector *connector = &vc4_hdmi->connector; 1570 struct platform_device *pdev = vc4_hdmi->pdev; 1571 int ret; 1572 1573 if (vc4_hdmi->variant->external_irq_controller) { 1574 unsigned int hpd_con = platform_get_irq_byname(pdev, "hpd-connected"); 1575 unsigned int hpd_rm = platform_get_irq_byname(pdev, "hpd-removed"); 1576 1577 ret = request_threaded_irq(hpd_con, 1578 NULL, 1579 vc4_hdmi_hpd_irq_thread, IRQF_ONESHOT, 1580 "vc4 hdmi hpd connected", vc4_hdmi); 1581 if (ret) 1582 return ret; 1583 1584 ret = request_threaded_irq(hpd_rm, 1585 NULL, 1586 vc4_hdmi_hpd_irq_thread, IRQF_ONESHOT, 1587 "vc4 hdmi hpd disconnected", vc4_hdmi); 1588 if (ret) { 1589 free_irq(hpd_con, vc4_hdmi); 1590 return ret; 1591 } 1592 1593 connector->polled = DRM_CONNECTOR_POLL_HPD; 1594 } 1595 1596 return 0; 1597 } 1598 1599 static void vc4_hdmi_hotplug_exit(struct vc4_hdmi *vc4_hdmi) 1600 { 1601 struct platform_device *pdev = vc4_hdmi->pdev; 1602 1603 if (vc4_hdmi->variant->external_irq_controller) { 1604 free_irq(platform_get_irq_byname(pdev, "hpd-connected"), vc4_hdmi); 1605 free_irq(platform_get_irq_byname(pdev, "hpd-removed"), vc4_hdmi); 1606 } 1607 } 1608 1609 #ifdef CONFIG_DRM_VC4_HDMI_CEC 1610 static irqreturn_t vc4_cec_irq_handler_rx_thread(int irq, void *priv) 1611 { 1612 struct vc4_hdmi *vc4_hdmi = priv; 1613 1614 if (vc4_hdmi->cec_rx_msg.len) 1615 cec_received_msg(vc4_hdmi->cec_adap, 1616 &vc4_hdmi->cec_rx_msg); 1617 1618 return IRQ_HANDLED; 1619 } 1620 1621 static irqreturn_t vc4_cec_irq_handler_tx_thread(int irq, void *priv) 1622 { 1623 struct vc4_hdmi *vc4_hdmi = priv; 1624 1625 if (vc4_hdmi->cec_tx_ok) { 1626 cec_transmit_done(vc4_hdmi->cec_adap, CEC_TX_STATUS_OK, 1627 0, 0, 0, 0); 1628 } else { 1629 /* 1630 * This CEC implementation makes 1 retry, so if we 1631 * get a NACK, then that means it made 2 attempts. 1632 */ 1633 cec_transmit_done(vc4_hdmi->cec_adap, CEC_TX_STATUS_NACK, 1634 0, 2, 0, 0); 1635 } 1636 return IRQ_HANDLED; 1637 } 1638 1639 static irqreturn_t vc4_cec_irq_handler_thread(int irq, void *priv) 1640 { 1641 struct vc4_hdmi *vc4_hdmi = priv; 1642 irqreturn_t ret; 1643 1644 if (vc4_hdmi->cec_irq_was_rx) 1645 ret = vc4_cec_irq_handler_rx_thread(irq, priv); 1646 else 1647 ret = vc4_cec_irq_handler_tx_thread(irq, priv); 1648 1649 return ret; 1650 } 1651 1652 static void vc4_cec_read_msg(struct vc4_hdmi *vc4_hdmi, u32 cntrl1) 1653 { 1654 struct drm_device *dev = vc4_hdmi->connector.dev; 1655 struct cec_msg *msg = &vc4_hdmi->cec_rx_msg; 1656 unsigned int i; 1657 1658 msg->len = 1 + ((cntrl1 & VC4_HDMI_CEC_REC_WRD_CNT_MASK) >> 1659 VC4_HDMI_CEC_REC_WRD_CNT_SHIFT); 1660 1661 if (msg->len > 16) { 1662 drm_err(dev, "Attempting to read too much data (%d)\n", msg->len); 1663 return; 1664 } 1665 1666 for (i = 0; i < msg->len; i += 4) { 1667 u32 val = HDMI_READ(HDMI_CEC_RX_DATA_1 + (i >> 2)); 1668 1669 msg->msg[i] = val & 0xff; 1670 msg->msg[i + 1] = (val >> 8) & 0xff; 1671 msg->msg[i + 2] = (val >> 16) & 0xff; 1672 msg->msg[i + 3] = (val >> 24) & 0xff; 1673 } 1674 } 1675 1676 static irqreturn_t vc4_cec_irq_handler_tx_bare(int irq, void *priv) 1677 { 1678 struct vc4_hdmi *vc4_hdmi = priv; 1679 u32 cntrl1; 1680 1681 cntrl1 = HDMI_READ(HDMI_CEC_CNTRL_1); 1682 vc4_hdmi->cec_tx_ok = cntrl1 & VC4_HDMI_CEC_TX_STATUS_GOOD; 1683 cntrl1 &= ~VC4_HDMI_CEC_START_XMIT_BEGIN; 1684 HDMI_WRITE(HDMI_CEC_CNTRL_1, cntrl1); 1685 1686 return IRQ_WAKE_THREAD; 1687 } 1688 1689 static irqreturn_t vc4_cec_irq_handler_rx_bare(int irq, void *priv) 1690 { 1691 struct vc4_hdmi *vc4_hdmi = priv; 1692 u32 cntrl1; 1693 1694 vc4_hdmi->cec_rx_msg.len = 0; 1695 cntrl1 = HDMI_READ(HDMI_CEC_CNTRL_1); 1696 vc4_cec_read_msg(vc4_hdmi, cntrl1); 1697 cntrl1 |= VC4_HDMI_CEC_CLEAR_RECEIVE_OFF; 1698 HDMI_WRITE(HDMI_CEC_CNTRL_1, cntrl1); 1699 cntrl1 &= ~VC4_HDMI_CEC_CLEAR_RECEIVE_OFF; 1700 1701 HDMI_WRITE(HDMI_CEC_CNTRL_1, cntrl1); 1702 1703 return IRQ_WAKE_THREAD; 1704 } 1705 1706 static irqreturn_t vc4_cec_irq_handler(int irq, void *priv) 1707 { 1708 struct vc4_hdmi *vc4_hdmi = priv; 1709 u32 stat = HDMI_READ(HDMI_CEC_CPU_STATUS); 1710 irqreturn_t ret; 1711 u32 cntrl5; 1712 1713 if (!(stat & VC4_HDMI_CPU_CEC)) 1714 return IRQ_NONE; 1715 1716 cntrl5 = HDMI_READ(HDMI_CEC_CNTRL_5); 1717 vc4_hdmi->cec_irq_was_rx = cntrl5 & VC4_HDMI_CEC_RX_CEC_INT; 1718 if (vc4_hdmi->cec_irq_was_rx) 1719 ret = vc4_cec_irq_handler_rx_bare(irq, priv); 1720 else 1721 ret = vc4_cec_irq_handler_tx_bare(irq, priv); 1722 1723 HDMI_WRITE(HDMI_CEC_CPU_CLEAR, VC4_HDMI_CPU_CEC); 1724 return ret; 1725 } 1726 1727 static int vc4_hdmi_cec_adap_enable(struct cec_adapter *adap, bool enable) 1728 { 1729 struct vc4_hdmi *vc4_hdmi = cec_get_drvdata(adap); 1730 /* clock period in microseconds */ 1731 const u32 usecs = 1000000 / CEC_CLOCK_FREQ; 1732 u32 val = HDMI_READ(HDMI_CEC_CNTRL_5); 1733 1734 val &= ~(VC4_HDMI_CEC_TX_SW_RESET | VC4_HDMI_CEC_RX_SW_RESET | 1735 VC4_HDMI_CEC_CNT_TO_4700_US_MASK | 1736 VC4_HDMI_CEC_CNT_TO_4500_US_MASK); 1737 val |= ((4700 / usecs) << VC4_HDMI_CEC_CNT_TO_4700_US_SHIFT) | 1738 ((4500 / usecs) << VC4_HDMI_CEC_CNT_TO_4500_US_SHIFT); 1739 1740 if (enable) { 1741 HDMI_WRITE(HDMI_CEC_CNTRL_5, val | 1742 VC4_HDMI_CEC_TX_SW_RESET | VC4_HDMI_CEC_RX_SW_RESET); 1743 HDMI_WRITE(HDMI_CEC_CNTRL_5, val); 1744 HDMI_WRITE(HDMI_CEC_CNTRL_2, 1745 ((1500 / usecs) << VC4_HDMI_CEC_CNT_TO_1500_US_SHIFT) | 1746 ((1300 / usecs) << VC4_HDMI_CEC_CNT_TO_1300_US_SHIFT) | 1747 ((800 / usecs) << VC4_HDMI_CEC_CNT_TO_800_US_SHIFT) | 1748 ((600 / usecs) << VC4_HDMI_CEC_CNT_TO_600_US_SHIFT) | 1749 ((400 / usecs) << VC4_HDMI_CEC_CNT_TO_400_US_SHIFT)); 1750 HDMI_WRITE(HDMI_CEC_CNTRL_3, 1751 ((2750 / usecs) << VC4_HDMI_CEC_CNT_TO_2750_US_SHIFT) | 1752 ((2400 / usecs) << VC4_HDMI_CEC_CNT_TO_2400_US_SHIFT) | 1753 ((2050 / usecs) << VC4_HDMI_CEC_CNT_TO_2050_US_SHIFT) | 1754 ((1700 / usecs) << VC4_HDMI_CEC_CNT_TO_1700_US_SHIFT)); 1755 HDMI_WRITE(HDMI_CEC_CNTRL_4, 1756 ((4300 / usecs) << VC4_HDMI_CEC_CNT_TO_4300_US_SHIFT) | 1757 ((3900 / usecs) << VC4_HDMI_CEC_CNT_TO_3900_US_SHIFT) | 1758 ((3600 / usecs) << VC4_HDMI_CEC_CNT_TO_3600_US_SHIFT) | 1759 ((3500 / usecs) << VC4_HDMI_CEC_CNT_TO_3500_US_SHIFT)); 1760 1761 if (!vc4_hdmi->variant->external_irq_controller) 1762 HDMI_WRITE(HDMI_CEC_CPU_MASK_CLEAR, VC4_HDMI_CPU_CEC); 1763 } else { 1764 if (!vc4_hdmi->variant->external_irq_controller) 1765 HDMI_WRITE(HDMI_CEC_CPU_MASK_SET, VC4_HDMI_CPU_CEC); 1766 HDMI_WRITE(HDMI_CEC_CNTRL_5, val | 1767 VC4_HDMI_CEC_TX_SW_RESET | VC4_HDMI_CEC_RX_SW_RESET); 1768 } 1769 return 0; 1770 } 1771 1772 static int vc4_hdmi_cec_adap_log_addr(struct cec_adapter *adap, u8 log_addr) 1773 { 1774 struct vc4_hdmi *vc4_hdmi = cec_get_drvdata(adap); 1775 1776 HDMI_WRITE(HDMI_CEC_CNTRL_1, 1777 (HDMI_READ(HDMI_CEC_CNTRL_1) & ~VC4_HDMI_CEC_ADDR_MASK) | 1778 (log_addr & 0xf) << VC4_HDMI_CEC_ADDR_SHIFT); 1779 return 0; 1780 } 1781 1782 static int vc4_hdmi_cec_adap_transmit(struct cec_adapter *adap, u8 attempts, 1783 u32 signal_free_time, struct cec_msg *msg) 1784 { 1785 struct vc4_hdmi *vc4_hdmi = cec_get_drvdata(adap); 1786 struct drm_device *dev = vc4_hdmi->connector.dev; 1787 u32 val; 1788 unsigned int i; 1789 1790 if (msg->len > 16) { 1791 drm_err(dev, "Attempting to transmit too much data (%d)\n", msg->len); 1792 return -ENOMEM; 1793 } 1794 1795 for (i = 0; i < msg->len; i += 4) 1796 HDMI_WRITE(HDMI_CEC_TX_DATA_1 + (i >> 2), 1797 (msg->msg[i]) | 1798 (msg->msg[i + 1] << 8) | 1799 (msg->msg[i + 2] << 16) | 1800 (msg->msg[i + 3] << 24)); 1801 1802 val = HDMI_READ(HDMI_CEC_CNTRL_1); 1803 val &= ~VC4_HDMI_CEC_START_XMIT_BEGIN; 1804 HDMI_WRITE(HDMI_CEC_CNTRL_1, val); 1805 val &= ~VC4_HDMI_CEC_MESSAGE_LENGTH_MASK; 1806 val |= (msg->len - 1) << VC4_HDMI_CEC_MESSAGE_LENGTH_SHIFT; 1807 val |= VC4_HDMI_CEC_START_XMIT_BEGIN; 1808 1809 HDMI_WRITE(HDMI_CEC_CNTRL_1, val); 1810 return 0; 1811 } 1812 1813 static const struct cec_adap_ops vc4_hdmi_cec_adap_ops = { 1814 .adap_enable = vc4_hdmi_cec_adap_enable, 1815 .adap_log_addr = vc4_hdmi_cec_adap_log_addr, 1816 .adap_transmit = vc4_hdmi_cec_adap_transmit, 1817 }; 1818 1819 static int vc4_hdmi_cec_init(struct vc4_hdmi *vc4_hdmi) 1820 { 1821 struct cec_connector_info conn_info; 1822 struct platform_device *pdev = vc4_hdmi->pdev; 1823 struct device *dev = &pdev->dev; 1824 u32 value; 1825 int ret; 1826 1827 if (!of_find_property(dev->of_node, "interrupts", NULL)) { 1828 dev_warn(dev, "'interrupts' DT property is missing, no CEC\n"); 1829 return 0; 1830 } 1831 1832 vc4_hdmi->cec_adap = cec_allocate_adapter(&vc4_hdmi_cec_adap_ops, 1833 vc4_hdmi, "vc4", 1834 CEC_CAP_DEFAULTS | 1835 CEC_CAP_CONNECTOR_INFO, 1); 1836 ret = PTR_ERR_OR_ZERO(vc4_hdmi->cec_adap); 1837 if (ret < 0) 1838 return ret; 1839 1840 cec_fill_conn_info_from_drm(&conn_info, &vc4_hdmi->connector); 1841 cec_s_conn_info(vc4_hdmi->cec_adap, &conn_info); 1842 1843 value = HDMI_READ(HDMI_CEC_CNTRL_1); 1844 /* Set the logical address to Unregistered */ 1845 value |= VC4_HDMI_CEC_ADDR_MASK; 1846 HDMI_WRITE(HDMI_CEC_CNTRL_1, value); 1847 1848 vc4_hdmi_cec_update_clk_div(vc4_hdmi); 1849 1850 if (vc4_hdmi->variant->external_irq_controller) { 1851 ret = request_threaded_irq(platform_get_irq_byname(pdev, "cec-rx"), 1852 vc4_cec_irq_handler_rx_bare, 1853 vc4_cec_irq_handler_rx_thread, 0, 1854 "vc4 hdmi cec rx", vc4_hdmi); 1855 if (ret) 1856 goto err_delete_cec_adap; 1857 1858 ret = request_threaded_irq(platform_get_irq_byname(pdev, "cec-tx"), 1859 vc4_cec_irq_handler_tx_bare, 1860 vc4_cec_irq_handler_tx_thread, 0, 1861 "vc4 hdmi cec tx", vc4_hdmi); 1862 if (ret) 1863 goto err_remove_cec_rx_handler; 1864 } else { 1865 HDMI_WRITE(HDMI_CEC_CPU_MASK_SET, 0xffffffff); 1866 1867 ret = request_threaded_irq(platform_get_irq(pdev, 0), 1868 vc4_cec_irq_handler, 1869 vc4_cec_irq_handler_thread, 0, 1870 "vc4 hdmi cec", vc4_hdmi); 1871 if (ret) 1872 goto err_delete_cec_adap; 1873 } 1874 1875 ret = cec_register_adapter(vc4_hdmi->cec_adap, &pdev->dev); 1876 if (ret < 0) 1877 goto err_remove_handlers; 1878 1879 return 0; 1880 1881 err_remove_handlers: 1882 if (vc4_hdmi->variant->external_irq_controller) 1883 free_irq(platform_get_irq_byname(pdev, "cec-tx"), vc4_hdmi); 1884 else 1885 free_irq(platform_get_irq(pdev, 0), vc4_hdmi); 1886 1887 err_remove_cec_rx_handler: 1888 if (vc4_hdmi->variant->external_irq_controller) 1889 free_irq(platform_get_irq_byname(pdev, "cec-rx"), vc4_hdmi); 1890 1891 err_delete_cec_adap: 1892 cec_delete_adapter(vc4_hdmi->cec_adap); 1893 1894 return ret; 1895 } 1896 1897 static void vc4_hdmi_cec_exit(struct vc4_hdmi *vc4_hdmi) 1898 { 1899 struct platform_device *pdev = vc4_hdmi->pdev; 1900 1901 if (vc4_hdmi->variant->external_irq_controller) { 1902 free_irq(platform_get_irq_byname(pdev, "cec-rx"), vc4_hdmi); 1903 free_irq(platform_get_irq_byname(pdev, "cec-tx"), vc4_hdmi); 1904 } else { 1905 free_irq(platform_get_irq(pdev, 0), vc4_hdmi); 1906 } 1907 1908 cec_unregister_adapter(vc4_hdmi->cec_adap); 1909 } 1910 #else 1911 static int vc4_hdmi_cec_init(struct vc4_hdmi *vc4_hdmi) 1912 { 1913 return 0; 1914 } 1915 1916 static void vc4_hdmi_cec_exit(struct vc4_hdmi *vc4_hdmi) {}; 1917 1918 #endif 1919 1920 static int vc4_hdmi_build_regset(struct vc4_hdmi *vc4_hdmi, 1921 struct debugfs_regset32 *regset, 1922 enum vc4_hdmi_regs reg) 1923 { 1924 const struct vc4_hdmi_variant *variant = vc4_hdmi->variant; 1925 struct debugfs_reg32 *regs, *new_regs; 1926 unsigned int count = 0; 1927 unsigned int i; 1928 1929 regs = kcalloc(variant->num_registers, sizeof(*regs), 1930 GFP_KERNEL); 1931 if (!regs) 1932 return -ENOMEM; 1933 1934 for (i = 0; i < variant->num_registers; i++) { 1935 const struct vc4_hdmi_register *field = &variant->registers[i]; 1936 1937 if (field->reg != reg) 1938 continue; 1939 1940 regs[count].name = field->name; 1941 regs[count].offset = field->offset; 1942 count++; 1943 } 1944 1945 new_regs = krealloc(regs, count * sizeof(*regs), GFP_KERNEL); 1946 if (!new_regs) 1947 return -ENOMEM; 1948 1949 regset->base = __vc4_hdmi_get_field_base(vc4_hdmi, reg); 1950 regset->regs = new_regs; 1951 regset->nregs = count; 1952 1953 return 0; 1954 } 1955 1956 static int vc4_hdmi_init_resources(struct vc4_hdmi *vc4_hdmi) 1957 { 1958 struct platform_device *pdev = vc4_hdmi->pdev; 1959 struct device *dev = &pdev->dev; 1960 int ret; 1961 1962 vc4_hdmi->hdmicore_regs = vc4_ioremap_regs(pdev, 0); 1963 if (IS_ERR(vc4_hdmi->hdmicore_regs)) 1964 return PTR_ERR(vc4_hdmi->hdmicore_regs); 1965 1966 vc4_hdmi->hd_regs = vc4_ioremap_regs(pdev, 1); 1967 if (IS_ERR(vc4_hdmi->hd_regs)) 1968 return PTR_ERR(vc4_hdmi->hd_regs); 1969 1970 ret = vc4_hdmi_build_regset(vc4_hdmi, &vc4_hdmi->hd_regset, VC4_HD); 1971 if (ret) 1972 return ret; 1973 1974 ret = vc4_hdmi_build_regset(vc4_hdmi, &vc4_hdmi->hdmi_regset, VC4_HDMI); 1975 if (ret) 1976 return ret; 1977 1978 vc4_hdmi->pixel_clock = devm_clk_get(dev, "pixel"); 1979 if (IS_ERR(vc4_hdmi->pixel_clock)) { 1980 ret = PTR_ERR(vc4_hdmi->pixel_clock); 1981 if (ret != -EPROBE_DEFER) 1982 DRM_ERROR("Failed to get pixel clock\n"); 1983 return ret; 1984 } 1985 1986 vc4_hdmi->hsm_clock = devm_clk_get(dev, "hdmi"); 1987 if (IS_ERR(vc4_hdmi->hsm_clock)) { 1988 DRM_ERROR("Failed to get HDMI state machine clock\n"); 1989 return PTR_ERR(vc4_hdmi->hsm_clock); 1990 } 1991 vc4_hdmi->audio_clock = vc4_hdmi->hsm_clock; 1992 vc4_hdmi->cec_clock = vc4_hdmi->hsm_clock; 1993 1994 return 0; 1995 } 1996 1997 static int vc5_hdmi_init_resources(struct vc4_hdmi *vc4_hdmi) 1998 { 1999 struct platform_device *pdev = vc4_hdmi->pdev; 2000 struct device *dev = &pdev->dev; 2001 struct resource *res; 2002 2003 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hdmi"); 2004 if (!res) 2005 return -ENODEV; 2006 2007 vc4_hdmi->hdmicore_regs = devm_ioremap(dev, res->start, 2008 resource_size(res)); 2009 if (!vc4_hdmi->hdmicore_regs) 2010 return -ENOMEM; 2011 2012 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hd"); 2013 if (!res) 2014 return -ENODEV; 2015 2016 vc4_hdmi->hd_regs = devm_ioremap(dev, res->start, resource_size(res)); 2017 if (!vc4_hdmi->hd_regs) 2018 return -ENOMEM; 2019 2020 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cec"); 2021 if (!res) 2022 return -ENODEV; 2023 2024 vc4_hdmi->cec_regs = devm_ioremap(dev, res->start, resource_size(res)); 2025 if (!vc4_hdmi->cec_regs) 2026 return -ENOMEM; 2027 2028 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "csc"); 2029 if (!res) 2030 return -ENODEV; 2031 2032 vc4_hdmi->csc_regs = devm_ioremap(dev, res->start, resource_size(res)); 2033 if (!vc4_hdmi->csc_regs) 2034 return -ENOMEM; 2035 2036 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dvp"); 2037 if (!res) 2038 return -ENODEV; 2039 2040 vc4_hdmi->dvp_regs = devm_ioremap(dev, res->start, resource_size(res)); 2041 if (!vc4_hdmi->dvp_regs) 2042 return -ENOMEM; 2043 2044 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy"); 2045 if (!res) 2046 return -ENODEV; 2047 2048 vc4_hdmi->phy_regs = devm_ioremap(dev, res->start, resource_size(res)); 2049 if (!vc4_hdmi->phy_regs) 2050 return -ENOMEM; 2051 2052 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "packet"); 2053 if (!res) 2054 return -ENODEV; 2055 2056 vc4_hdmi->ram_regs = devm_ioremap(dev, res->start, resource_size(res)); 2057 if (!vc4_hdmi->ram_regs) 2058 return -ENOMEM; 2059 2060 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rm"); 2061 if (!res) 2062 return -ENODEV; 2063 2064 vc4_hdmi->rm_regs = devm_ioremap(dev, res->start, resource_size(res)); 2065 if (!vc4_hdmi->rm_regs) 2066 return -ENOMEM; 2067 2068 vc4_hdmi->hsm_clock = devm_clk_get(dev, "hdmi"); 2069 if (IS_ERR(vc4_hdmi->hsm_clock)) { 2070 DRM_ERROR("Failed to get HDMI state machine clock\n"); 2071 return PTR_ERR(vc4_hdmi->hsm_clock); 2072 } 2073 2074 vc4_hdmi->pixel_bvb_clock = devm_clk_get(dev, "bvb"); 2075 if (IS_ERR(vc4_hdmi->pixel_bvb_clock)) { 2076 DRM_ERROR("Failed to get pixel bvb clock\n"); 2077 return PTR_ERR(vc4_hdmi->pixel_bvb_clock); 2078 } 2079 2080 vc4_hdmi->audio_clock = devm_clk_get(dev, "audio"); 2081 if (IS_ERR(vc4_hdmi->audio_clock)) { 2082 DRM_ERROR("Failed to get audio clock\n"); 2083 return PTR_ERR(vc4_hdmi->audio_clock); 2084 } 2085 2086 vc4_hdmi->cec_clock = devm_clk_get(dev, "cec"); 2087 if (IS_ERR(vc4_hdmi->cec_clock)) { 2088 DRM_ERROR("Failed to get CEC clock\n"); 2089 return PTR_ERR(vc4_hdmi->cec_clock); 2090 } 2091 2092 vc4_hdmi->reset = devm_reset_control_get(dev, NULL); 2093 if (IS_ERR(vc4_hdmi->reset)) { 2094 DRM_ERROR("Failed to get HDMI reset line\n"); 2095 return PTR_ERR(vc4_hdmi->reset); 2096 } 2097 2098 return 0; 2099 } 2100 2101 static int vc4_hdmi_bind(struct device *dev, struct device *master, void *data) 2102 { 2103 const struct vc4_hdmi_variant *variant = of_device_get_match_data(dev); 2104 struct platform_device *pdev = to_platform_device(dev); 2105 struct drm_device *drm = dev_get_drvdata(master); 2106 struct vc4_hdmi *vc4_hdmi; 2107 struct drm_encoder *encoder; 2108 struct device_node *ddc_node; 2109 int ret; 2110 2111 vc4_hdmi = devm_kzalloc(dev, sizeof(*vc4_hdmi), GFP_KERNEL); 2112 if (!vc4_hdmi) 2113 return -ENOMEM; 2114 INIT_DELAYED_WORK(&vc4_hdmi->scrambling_work, vc4_hdmi_scrambling_wq); 2115 2116 dev_set_drvdata(dev, vc4_hdmi); 2117 encoder = &vc4_hdmi->encoder.base.base; 2118 vc4_hdmi->encoder.base.type = variant->encoder_type; 2119 vc4_hdmi->encoder.base.pre_crtc_configure = vc4_hdmi_encoder_pre_crtc_configure; 2120 vc4_hdmi->encoder.base.pre_crtc_enable = vc4_hdmi_encoder_pre_crtc_enable; 2121 vc4_hdmi->encoder.base.post_crtc_enable = vc4_hdmi_encoder_post_crtc_enable; 2122 vc4_hdmi->encoder.base.post_crtc_disable = vc4_hdmi_encoder_post_crtc_disable; 2123 vc4_hdmi->encoder.base.post_crtc_powerdown = vc4_hdmi_encoder_post_crtc_powerdown; 2124 vc4_hdmi->pdev = pdev; 2125 vc4_hdmi->variant = variant; 2126 2127 ret = variant->init_resources(vc4_hdmi); 2128 if (ret) 2129 return ret; 2130 2131 ddc_node = of_parse_phandle(dev->of_node, "ddc", 0); 2132 if (!ddc_node) { 2133 DRM_ERROR("Failed to find ddc node in device tree\n"); 2134 return -ENODEV; 2135 } 2136 2137 vc4_hdmi->ddc = of_find_i2c_adapter_by_node(ddc_node); 2138 of_node_put(ddc_node); 2139 if (!vc4_hdmi->ddc) { 2140 DRM_DEBUG("Failed to get ddc i2c adapter by node\n"); 2141 return -EPROBE_DEFER; 2142 } 2143 2144 /* Only use the GPIO HPD pin if present in the DT, otherwise 2145 * we'll use the HDMI core's register. 2146 */ 2147 vc4_hdmi->hpd_gpio = devm_gpiod_get_optional(dev, "hpd", GPIOD_IN); 2148 if (IS_ERR(vc4_hdmi->hpd_gpio)) { 2149 ret = PTR_ERR(vc4_hdmi->hpd_gpio); 2150 goto err_put_ddc; 2151 } 2152 2153 vc4_hdmi->disable_wifi_frequencies = 2154 of_property_read_bool(dev->of_node, "wifi-2.4ghz-coexistence"); 2155 2156 if (variant->max_pixel_clock == 600000000) { 2157 struct vc4_dev *vc4 = to_vc4_dev(drm); 2158 long max_rate = clk_round_rate(vc4->hvs->core_clk, 550000000); 2159 2160 if (max_rate < 550000000) 2161 vc4_hdmi->disable_4kp60 = true; 2162 } 2163 2164 if (vc4_hdmi->variant->reset) 2165 vc4_hdmi->variant->reset(vc4_hdmi); 2166 2167 if ((of_device_is_compatible(dev->of_node, "brcm,bcm2711-hdmi0") || 2168 of_device_is_compatible(dev->of_node, "brcm,bcm2711-hdmi1")) && 2169 HDMI_READ(HDMI_VID_CTL) & VC4_HD_VID_CTL_ENABLE) { 2170 clk_prepare_enable(vc4_hdmi->pixel_clock); 2171 clk_prepare_enable(vc4_hdmi->hsm_clock); 2172 clk_prepare_enable(vc4_hdmi->pixel_bvb_clock); 2173 } 2174 2175 pm_runtime_enable(dev); 2176 2177 drm_simple_encoder_init(drm, encoder, DRM_MODE_ENCODER_TMDS); 2178 drm_encoder_helper_add(encoder, &vc4_hdmi_encoder_helper_funcs); 2179 2180 ret = vc4_hdmi_connector_init(drm, vc4_hdmi); 2181 if (ret) 2182 goto err_destroy_encoder; 2183 2184 ret = vc4_hdmi_hotplug_init(vc4_hdmi); 2185 if (ret) 2186 goto err_destroy_conn; 2187 2188 ret = vc4_hdmi_cec_init(vc4_hdmi); 2189 if (ret) 2190 goto err_free_hotplug; 2191 2192 ret = vc4_hdmi_audio_init(vc4_hdmi); 2193 if (ret) 2194 goto err_free_cec; 2195 2196 vc4_debugfs_add_file(drm, variant->debugfs_name, 2197 vc4_hdmi_debugfs_regs, 2198 vc4_hdmi); 2199 2200 return 0; 2201 2202 err_free_cec: 2203 vc4_hdmi_cec_exit(vc4_hdmi); 2204 err_free_hotplug: 2205 vc4_hdmi_hotplug_exit(vc4_hdmi); 2206 err_destroy_conn: 2207 vc4_hdmi_connector_destroy(&vc4_hdmi->connector); 2208 err_destroy_encoder: 2209 drm_encoder_cleanup(encoder); 2210 pm_runtime_disable(dev); 2211 err_put_ddc: 2212 put_device(&vc4_hdmi->ddc->dev); 2213 2214 return ret; 2215 } 2216 2217 static void vc4_hdmi_unbind(struct device *dev, struct device *master, 2218 void *data) 2219 { 2220 struct vc4_hdmi *vc4_hdmi; 2221 2222 /* 2223 * ASoC makes it a bit hard to retrieve a pointer to the 2224 * vc4_hdmi structure. Registering the card will overwrite our 2225 * device drvdata with a pointer to the snd_soc_card structure, 2226 * which can then be used to retrieve whatever drvdata we want 2227 * to associate. 2228 * 2229 * However, that doesn't fly in the case where we wouldn't 2230 * register an ASoC card (because of an old DT that is missing 2231 * the dmas properties for example), then the card isn't 2232 * registered and the device drvdata wouldn't be set. 2233 * 2234 * We can deal with both cases by making sure a snd_soc_card 2235 * pointer and a vc4_hdmi structure are pointing to the same 2236 * memory address, so we can treat them indistinctly without any 2237 * issue. 2238 */ 2239 BUILD_BUG_ON(offsetof(struct vc4_hdmi_audio, card) != 0); 2240 BUILD_BUG_ON(offsetof(struct vc4_hdmi, audio) != 0); 2241 vc4_hdmi = dev_get_drvdata(dev); 2242 2243 kfree(vc4_hdmi->hdmi_regset.regs); 2244 kfree(vc4_hdmi->hd_regset.regs); 2245 2246 vc4_hdmi_cec_exit(vc4_hdmi); 2247 vc4_hdmi_hotplug_exit(vc4_hdmi); 2248 vc4_hdmi_connector_destroy(&vc4_hdmi->connector); 2249 drm_encoder_cleanup(&vc4_hdmi->encoder.base.base); 2250 2251 pm_runtime_disable(dev); 2252 2253 put_device(&vc4_hdmi->ddc->dev); 2254 } 2255 2256 static const struct component_ops vc4_hdmi_ops = { 2257 .bind = vc4_hdmi_bind, 2258 .unbind = vc4_hdmi_unbind, 2259 }; 2260 2261 static int vc4_hdmi_dev_probe(struct platform_device *pdev) 2262 { 2263 return component_add(&pdev->dev, &vc4_hdmi_ops); 2264 } 2265 2266 static int vc4_hdmi_dev_remove(struct platform_device *pdev) 2267 { 2268 component_del(&pdev->dev, &vc4_hdmi_ops); 2269 return 0; 2270 } 2271 2272 static const struct vc4_hdmi_variant bcm2835_variant = { 2273 .encoder_type = VC4_ENCODER_TYPE_HDMI0, 2274 .debugfs_name = "hdmi_regs", 2275 .card_name = "vc4-hdmi", 2276 .max_pixel_clock = 162000000, 2277 .registers = vc4_hdmi_fields, 2278 .num_registers = ARRAY_SIZE(vc4_hdmi_fields), 2279 2280 .init_resources = vc4_hdmi_init_resources, 2281 .csc_setup = vc4_hdmi_csc_setup, 2282 .reset = vc4_hdmi_reset, 2283 .set_timings = vc4_hdmi_set_timings, 2284 .phy_init = vc4_hdmi_phy_init, 2285 .phy_disable = vc4_hdmi_phy_disable, 2286 .phy_rng_enable = vc4_hdmi_phy_rng_enable, 2287 .phy_rng_disable = vc4_hdmi_phy_rng_disable, 2288 .channel_map = vc4_hdmi_channel_map, 2289 .supports_hdr = false, 2290 }; 2291 2292 static const struct vc4_hdmi_variant bcm2711_hdmi0_variant = { 2293 .encoder_type = VC4_ENCODER_TYPE_HDMI0, 2294 .debugfs_name = "hdmi0_regs", 2295 .card_name = "vc4-hdmi-0", 2296 .max_pixel_clock = HDMI_14_MAX_TMDS_CLK, 2297 .registers = vc5_hdmi_hdmi0_fields, 2298 .num_registers = ARRAY_SIZE(vc5_hdmi_hdmi0_fields), 2299 .phy_lane_mapping = { 2300 PHY_LANE_0, 2301 PHY_LANE_1, 2302 PHY_LANE_2, 2303 PHY_LANE_CK, 2304 }, 2305 .unsupported_odd_h_timings = true, 2306 .external_irq_controller = true, 2307 2308 .init_resources = vc5_hdmi_init_resources, 2309 .csc_setup = vc5_hdmi_csc_setup, 2310 .reset = vc5_hdmi_reset, 2311 .set_timings = vc5_hdmi_set_timings, 2312 .phy_init = vc5_hdmi_phy_init, 2313 .phy_disable = vc5_hdmi_phy_disable, 2314 .phy_rng_enable = vc5_hdmi_phy_rng_enable, 2315 .phy_rng_disable = vc5_hdmi_phy_rng_disable, 2316 .channel_map = vc5_hdmi_channel_map, 2317 .supports_hdr = true, 2318 }; 2319 2320 static const struct vc4_hdmi_variant bcm2711_hdmi1_variant = { 2321 .encoder_type = VC4_ENCODER_TYPE_HDMI1, 2322 .debugfs_name = "hdmi1_regs", 2323 .card_name = "vc4-hdmi-1", 2324 .max_pixel_clock = HDMI_14_MAX_TMDS_CLK, 2325 .registers = vc5_hdmi_hdmi1_fields, 2326 .num_registers = ARRAY_SIZE(vc5_hdmi_hdmi1_fields), 2327 .phy_lane_mapping = { 2328 PHY_LANE_1, 2329 PHY_LANE_0, 2330 PHY_LANE_CK, 2331 PHY_LANE_2, 2332 }, 2333 .unsupported_odd_h_timings = true, 2334 .external_irq_controller = true, 2335 2336 .init_resources = vc5_hdmi_init_resources, 2337 .csc_setup = vc5_hdmi_csc_setup, 2338 .reset = vc5_hdmi_reset, 2339 .set_timings = vc5_hdmi_set_timings, 2340 .phy_init = vc5_hdmi_phy_init, 2341 .phy_disable = vc5_hdmi_phy_disable, 2342 .phy_rng_enable = vc5_hdmi_phy_rng_enable, 2343 .phy_rng_disable = vc5_hdmi_phy_rng_disable, 2344 .channel_map = vc5_hdmi_channel_map, 2345 .supports_hdr = true, 2346 }; 2347 2348 static const struct of_device_id vc4_hdmi_dt_match[] = { 2349 { .compatible = "brcm,bcm2835-hdmi", .data = &bcm2835_variant }, 2350 { .compatible = "brcm,bcm2711-hdmi0", .data = &bcm2711_hdmi0_variant }, 2351 { .compatible = "brcm,bcm2711-hdmi1", .data = &bcm2711_hdmi1_variant }, 2352 {} 2353 }; 2354 2355 struct platform_driver vc4_hdmi_driver = { 2356 .probe = vc4_hdmi_dev_probe, 2357 .remove = vc4_hdmi_dev_remove, 2358 .driver = { 2359 .name = "vc4_hdmi", 2360 .of_match_table = vc4_hdmi_dt_match, 2361 }, 2362 }; 2363