1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd 4 * Zheng Yang <zhengyang@rock-chips.com> 5 */ 6 7 #include <drm/drm_of.h> 8 #include <drm/drm_probe_helper.h> 9 10 #include <linux/clk.h> 11 #include <linux/mfd/syscon.h> 12 #include <linux/platform_device.h> 13 #include <linux/regmap.h> 14 15 #include "rk3066_hdmi.h" 16 17 #include "rockchip_drm_drv.h" 18 #include "rockchip_drm_vop.h" 19 20 #define DEFAULT_PLLA_RATE 30000000 21 22 struct hdmi_data_info { 23 int vic; /* The CEA Video ID (VIC) of the current drm display mode. */ 24 bool sink_is_hdmi; 25 unsigned int enc_out_format; 26 unsigned int colorimetry; 27 }; 28 29 struct rk3066_hdmi_i2c { 30 struct i2c_adapter adap; 31 32 u8 ddc_addr; 33 u8 segment_addr; 34 u8 stat; 35 36 struct mutex i2c_lock; /* For i2c operation. */ 37 struct completion cmpltn; 38 }; 39 40 struct rk3066_hdmi { 41 struct device *dev; 42 struct drm_device *drm_dev; 43 struct regmap *grf_regmap; 44 int irq; 45 struct clk *hclk; 46 void __iomem *regs; 47 48 struct drm_connector connector; 49 struct drm_encoder encoder; 50 51 struct rk3066_hdmi_i2c *i2c; 52 struct i2c_adapter *ddc; 53 54 unsigned int tmdsclk; 55 56 struct hdmi_data_info hdmi_data; 57 struct drm_display_mode previous_mode; 58 }; 59 60 #define to_rk3066_hdmi(x) container_of(x, struct rk3066_hdmi, x) 61 62 static inline u8 hdmi_readb(struct rk3066_hdmi *hdmi, u16 offset) 63 { 64 return readl_relaxed(hdmi->regs + offset); 65 } 66 67 static inline void hdmi_writeb(struct rk3066_hdmi *hdmi, u16 offset, u32 val) 68 { 69 writel_relaxed(val, hdmi->regs + offset); 70 } 71 72 static inline void hdmi_modb(struct rk3066_hdmi *hdmi, u16 offset, 73 u32 msk, u32 val) 74 { 75 u8 temp = hdmi_readb(hdmi, offset) & ~msk; 76 77 temp |= val & msk; 78 hdmi_writeb(hdmi, offset, temp); 79 } 80 81 static void rk3066_hdmi_i2c_init(struct rk3066_hdmi *hdmi) 82 { 83 int ddc_bus_freq; 84 85 ddc_bus_freq = (hdmi->tmdsclk >> 2) / HDMI_SCL_RATE; 86 87 hdmi_writeb(hdmi, HDMI_DDC_BUS_FREQ_L, ddc_bus_freq & 0xFF); 88 hdmi_writeb(hdmi, HDMI_DDC_BUS_FREQ_H, (ddc_bus_freq >> 8) & 0xFF); 89 90 /* Clear the EDID interrupt flag and mute the interrupt. */ 91 hdmi_modb(hdmi, HDMI_INTR_MASK1, HDMI_INTR_EDID_MASK, 0); 92 hdmi_writeb(hdmi, HDMI_INTR_STATUS1, HDMI_INTR_EDID_MASK); 93 } 94 95 static inline u8 rk3066_hdmi_get_power_mode(struct rk3066_hdmi *hdmi) 96 { 97 return hdmi_readb(hdmi, HDMI_SYS_CTRL) & HDMI_SYS_POWER_MODE_MASK; 98 } 99 100 static void rk3066_hdmi_set_power_mode(struct rk3066_hdmi *hdmi, int mode) 101 { 102 u8 current_mode, next_mode; 103 u8 i = 0; 104 105 current_mode = rk3066_hdmi_get_power_mode(hdmi); 106 107 DRM_DEV_DEBUG(hdmi->dev, "mode :%d\n", mode); 108 DRM_DEV_DEBUG(hdmi->dev, "current_mode :%d\n", current_mode); 109 110 if (current_mode == mode) 111 return; 112 113 do { 114 if (current_mode > mode) { 115 next_mode = current_mode / 2; 116 } else { 117 if (current_mode < HDMI_SYS_POWER_MODE_A) 118 next_mode = HDMI_SYS_POWER_MODE_A; 119 else 120 next_mode = current_mode * 2; 121 } 122 123 DRM_DEV_DEBUG(hdmi->dev, "%d: next_mode :%d\n", i, next_mode); 124 125 if (next_mode != HDMI_SYS_POWER_MODE_D) { 126 hdmi_modb(hdmi, HDMI_SYS_CTRL, 127 HDMI_SYS_POWER_MODE_MASK, next_mode); 128 } else { 129 hdmi_writeb(hdmi, HDMI_SYS_CTRL, 130 HDMI_SYS_POWER_MODE_D | 131 HDMI_SYS_PLL_RESET_MASK); 132 usleep_range(90, 100); 133 hdmi_writeb(hdmi, HDMI_SYS_CTRL, 134 HDMI_SYS_POWER_MODE_D | 135 HDMI_SYS_PLLB_RESET); 136 usleep_range(90, 100); 137 hdmi_writeb(hdmi, HDMI_SYS_CTRL, 138 HDMI_SYS_POWER_MODE_D); 139 } 140 current_mode = next_mode; 141 i = i + 1; 142 } while ((next_mode != mode) && (i < 5)); 143 144 /* 145 * When the IP controller isn't configured with accurate video timing, 146 * DDC_CLK should be equal to the PLLA frequency, which is 30MHz, 147 * so we need to init the TMDS rate to the PCLK rate and reconfigure 148 * the DDC clock. 149 */ 150 if (mode < HDMI_SYS_POWER_MODE_D) 151 hdmi->tmdsclk = DEFAULT_PLLA_RATE; 152 } 153 154 static int 155 rk3066_hdmi_upload_frame(struct rk3066_hdmi *hdmi, int setup_rc, 156 union hdmi_infoframe *frame, u32 frame_index, 157 u32 mask, u32 disable, u32 enable) 158 { 159 if (mask) 160 hdmi_modb(hdmi, HDMI_CP_AUTO_SEND_CTRL, mask, disable); 161 162 hdmi_writeb(hdmi, HDMI_CP_BUF_INDEX, frame_index); 163 164 if (setup_rc >= 0) { 165 u8 packed_frame[HDMI_MAXIMUM_INFO_FRAME_SIZE]; 166 ssize_t rc, i; 167 168 rc = hdmi_infoframe_pack(frame, packed_frame, 169 sizeof(packed_frame)); 170 if (rc < 0) 171 return rc; 172 173 for (i = 0; i < rc; i++) 174 hdmi_writeb(hdmi, HDMI_CP_BUF_ACC_HB0 + i * 4, 175 packed_frame[i]); 176 177 if (mask) 178 hdmi_modb(hdmi, HDMI_CP_AUTO_SEND_CTRL, mask, enable); 179 } 180 181 return setup_rc; 182 } 183 184 static int rk3066_hdmi_config_avi(struct rk3066_hdmi *hdmi, 185 struct drm_display_mode *mode) 186 { 187 union hdmi_infoframe frame; 188 int rc; 189 190 rc = drm_hdmi_avi_infoframe_from_display_mode(&frame.avi, 191 &hdmi->connector, mode); 192 193 if (hdmi->hdmi_data.enc_out_format == HDMI_COLORSPACE_YUV444) 194 frame.avi.colorspace = HDMI_COLORSPACE_YUV444; 195 else if (hdmi->hdmi_data.enc_out_format == HDMI_COLORSPACE_YUV422) 196 frame.avi.colorspace = HDMI_COLORSPACE_YUV422; 197 else 198 frame.avi.colorspace = HDMI_COLORSPACE_RGB; 199 200 frame.avi.colorimetry = hdmi->hdmi_data.colorimetry; 201 frame.avi.scan_mode = HDMI_SCAN_MODE_NONE; 202 203 return rk3066_hdmi_upload_frame(hdmi, rc, &frame, 204 HDMI_INFOFRAME_AVI, 0, 0, 0); 205 } 206 207 static int rk3066_hdmi_config_video_timing(struct rk3066_hdmi *hdmi, 208 struct drm_display_mode *mode) 209 { 210 int value, vsync_offset; 211 212 /* Set the details for the external polarity and interlace mode. */ 213 value = HDMI_EXT_VIDEO_SET_EN; 214 value |= mode->flags & DRM_MODE_FLAG_PHSYNC ? 215 HDMI_VIDEO_HSYNC_ACTIVE_HIGH : HDMI_VIDEO_HSYNC_ACTIVE_LOW; 216 value |= mode->flags & DRM_MODE_FLAG_PVSYNC ? 217 HDMI_VIDEO_VSYNC_ACTIVE_HIGH : HDMI_VIDEO_VSYNC_ACTIVE_LOW; 218 value |= mode->flags & DRM_MODE_FLAG_INTERLACE ? 219 HDMI_VIDEO_MODE_INTERLACE : HDMI_VIDEO_MODE_PROGRESSIVE; 220 221 if (hdmi->hdmi_data.vic == 2 || hdmi->hdmi_data.vic == 3) 222 vsync_offset = 6; 223 else 224 vsync_offset = 0; 225 226 value |= vsync_offset << HDMI_VIDEO_VSYNC_OFFSET_SHIFT; 227 hdmi_writeb(hdmi, HDMI_EXT_VIDEO_PARA, value); 228 229 /* Set the details for the external video timing. */ 230 value = mode->htotal; 231 hdmi_writeb(hdmi, HDMI_EXT_HTOTAL_L, value & 0xFF); 232 hdmi_writeb(hdmi, HDMI_EXT_HTOTAL_H, (value >> 8) & 0xFF); 233 234 value = mode->htotal - mode->hdisplay; 235 hdmi_writeb(hdmi, HDMI_EXT_HBLANK_L, value & 0xFF); 236 hdmi_writeb(hdmi, HDMI_EXT_HBLANK_H, (value >> 8) & 0xFF); 237 238 value = mode->htotal - mode->hsync_start; 239 hdmi_writeb(hdmi, HDMI_EXT_HDELAY_L, value & 0xFF); 240 hdmi_writeb(hdmi, HDMI_EXT_HDELAY_H, (value >> 8) & 0xFF); 241 242 value = mode->hsync_end - mode->hsync_start; 243 hdmi_writeb(hdmi, HDMI_EXT_HDURATION_L, value & 0xFF); 244 hdmi_writeb(hdmi, HDMI_EXT_HDURATION_H, (value >> 8) & 0xFF); 245 246 value = mode->vtotal; 247 hdmi_writeb(hdmi, HDMI_EXT_VTOTAL_L, value & 0xFF); 248 hdmi_writeb(hdmi, HDMI_EXT_VTOTAL_H, (value >> 8) & 0xFF); 249 250 value = mode->vtotal - mode->vdisplay; 251 hdmi_writeb(hdmi, HDMI_EXT_VBLANK_L, value & 0xFF); 252 253 value = mode->vtotal - mode->vsync_start + vsync_offset; 254 hdmi_writeb(hdmi, HDMI_EXT_VDELAY, value & 0xFF); 255 256 value = mode->vsync_end - mode->vsync_start; 257 hdmi_writeb(hdmi, HDMI_EXT_VDURATION, value & 0xFF); 258 259 return 0; 260 } 261 262 static void 263 rk3066_hdmi_phy_write(struct rk3066_hdmi *hdmi, u16 offset, u8 value) 264 { 265 hdmi_writeb(hdmi, offset, value); 266 hdmi_modb(hdmi, HDMI_SYS_CTRL, 267 HDMI_SYS_PLL_RESET_MASK, HDMI_SYS_PLL_RESET); 268 usleep_range(90, 100); 269 hdmi_modb(hdmi, HDMI_SYS_CTRL, HDMI_SYS_PLL_RESET_MASK, 0); 270 usleep_range(900, 1000); 271 } 272 273 static void rk3066_hdmi_config_phy(struct rk3066_hdmi *hdmi) 274 { 275 /* TMDS uses the same frequency as dclk. */ 276 hdmi_writeb(hdmi, HDMI_DEEP_COLOR_MODE, 0x22); 277 278 /* 279 * The semi-public documentation does not describe the hdmi registers 280 * used by the function rk3066_hdmi_phy_write(), so we keep using 281 * these magic values for now. 282 */ 283 if (hdmi->tmdsclk > 100000000) { 284 rk3066_hdmi_phy_write(hdmi, 0x158, 0x0E); 285 rk3066_hdmi_phy_write(hdmi, 0x15c, 0x00); 286 rk3066_hdmi_phy_write(hdmi, 0x160, 0x60); 287 rk3066_hdmi_phy_write(hdmi, 0x164, 0x00); 288 rk3066_hdmi_phy_write(hdmi, 0x168, 0xDA); 289 rk3066_hdmi_phy_write(hdmi, 0x16c, 0xA1); 290 rk3066_hdmi_phy_write(hdmi, 0x170, 0x0e); 291 rk3066_hdmi_phy_write(hdmi, 0x174, 0x22); 292 rk3066_hdmi_phy_write(hdmi, 0x178, 0x00); 293 } else if (hdmi->tmdsclk > 50000000) { 294 rk3066_hdmi_phy_write(hdmi, 0x158, 0x06); 295 rk3066_hdmi_phy_write(hdmi, 0x15c, 0x00); 296 rk3066_hdmi_phy_write(hdmi, 0x160, 0x60); 297 rk3066_hdmi_phy_write(hdmi, 0x164, 0x00); 298 rk3066_hdmi_phy_write(hdmi, 0x168, 0xCA); 299 rk3066_hdmi_phy_write(hdmi, 0x16c, 0xA3); 300 rk3066_hdmi_phy_write(hdmi, 0x170, 0x0e); 301 rk3066_hdmi_phy_write(hdmi, 0x174, 0x20); 302 rk3066_hdmi_phy_write(hdmi, 0x178, 0x00); 303 } else { 304 rk3066_hdmi_phy_write(hdmi, 0x158, 0x02); 305 rk3066_hdmi_phy_write(hdmi, 0x15c, 0x00); 306 rk3066_hdmi_phy_write(hdmi, 0x160, 0x60); 307 rk3066_hdmi_phy_write(hdmi, 0x164, 0x00); 308 rk3066_hdmi_phy_write(hdmi, 0x168, 0xC2); 309 rk3066_hdmi_phy_write(hdmi, 0x16c, 0xA2); 310 rk3066_hdmi_phy_write(hdmi, 0x170, 0x0e); 311 rk3066_hdmi_phy_write(hdmi, 0x174, 0x20); 312 rk3066_hdmi_phy_write(hdmi, 0x178, 0x00); 313 } 314 } 315 316 static int rk3066_hdmi_setup(struct rk3066_hdmi *hdmi, 317 struct drm_display_mode *mode) 318 { 319 hdmi->hdmi_data.vic = drm_match_cea_mode(mode); 320 hdmi->hdmi_data.enc_out_format = HDMI_COLORSPACE_RGB; 321 322 if (hdmi->hdmi_data.vic == 6 || hdmi->hdmi_data.vic == 7 || 323 hdmi->hdmi_data.vic == 21 || hdmi->hdmi_data.vic == 22 || 324 hdmi->hdmi_data.vic == 2 || hdmi->hdmi_data.vic == 3 || 325 hdmi->hdmi_data.vic == 17 || hdmi->hdmi_data.vic == 18) 326 hdmi->hdmi_data.colorimetry = HDMI_COLORIMETRY_ITU_601; 327 else 328 hdmi->hdmi_data.colorimetry = HDMI_COLORIMETRY_ITU_709; 329 330 hdmi->tmdsclk = mode->clock * 1000; 331 332 /* Mute video and audio output. */ 333 hdmi_modb(hdmi, HDMI_VIDEO_CTRL2, HDMI_VIDEO_AUDIO_DISABLE_MASK, 334 HDMI_AUDIO_DISABLE | HDMI_VIDEO_DISABLE); 335 336 /* Set power state to mode B. */ 337 if (rk3066_hdmi_get_power_mode(hdmi) != HDMI_SYS_POWER_MODE_B) 338 rk3066_hdmi_set_power_mode(hdmi, HDMI_SYS_POWER_MODE_B); 339 340 /* Input video mode is RGB 24 bit. Use external data enable signal. */ 341 hdmi_modb(hdmi, HDMI_AV_CTRL1, 342 HDMI_VIDEO_DE_MASK, HDMI_VIDEO_EXTERNAL_DE); 343 hdmi_writeb(hdmi, HDMI_VIDEO_CTRL1, 344 HDMI_VIDEO_OUTPUT_RGB444 | 345 HDMI_VIDEO_INPUT_DATA_DEPTH_8BIT | 346 HDMI_VIDEO_INPUT_COLOR_RGB); 347 hdmi_writeb(hdmi, HDMI_DEEP_COLOR_MODE, 0x20); 348 349 rk3066_hdmi_config_video_timing(hdmi, mode); 350 351 if (hdmi->hdmi_data.sink_is_hdmi) { 352 hdmi_modb(hdmi, HDMI_HDCP_CTRL, HDMI_VIDEO_MODE_MASK, 353 HDMI_VIDEO_MODE_HDMI); 354 rk3066_hdmi_config_avi(hdmi, mode); 355 } else { 356 hdmi_modb(hdmi, HDMI_HDCP_CTRL, HDMI_VIDEO_MODE_MASK, 0); 357 } 358 359 rk3066_hdmi_config_phy(hdmi); 360 361 rk3066_hdmi_set_power_mode(hdmi, HDMI_SYS_POWER_MODE_E); 362 363 /* 364 * When the IP controller is configured with accurate video 365 * timing, the TMDS clock source should be switched to 366 * DCLK_LCDC, so we need to init the TMDS rate to the pixel mode 367 * clock rate and reconfigure the DDC clock. 368 */ 369 rk3066_hdmi_i2c_init(hdmi); 370 371 /* Unmute video output. */ 372 hdmi_modb(hdmi, HDMI_VIDEO_CTRL2, 373 HDMI_VIDEO_AUDIO_DISABLE_MASK, HDMI_AUDIO_DISABLE); 374 return 0; 375 } 376 377 static void 378 rk3066_hdmi_encoder_mode_set(struct drm_encoder *encoder, 379 struct drm_display_mode *mode, 380 struct drm_display_mode *adj_mode) 381 { 382 struct rk3066_hdmi *hdmi = to_rk3066_hdmi(encoder); 383 384 /* Store the display mode for plugin/DPMS poweron events. */ 385 memcpy(&hdmi->previous_mode, adj_mode, sizeof(hdmi->previous_mode)); 386 } 387 388 static void rk3066_hdmi_encoder_enable(struct drm_encoder *encoder) 389 { 390 struct rk3066_hdmi *hdmi = to_rk3066_hdmi(encoder); 391 int mux, val; 392 393 mux = drm_of_encoder_active_endpoint_id(hdmi->dev->of_node, encoder); 394 if (mux) 395 val = (HDMI_VIDEO_SEL << 16) | HDMI_VIDEO_SEL; 396 else 397 val = HDMI_VIDEO_SEL << 16; 398 399 regmap_write(hdmi->grf_regmap, GRF_SOC_CON0, val); 400 401 DRM_DEV_DEBUG(hdmi->dev, "hdmi encoder enable select: vop%s\n", 402 (mux) ? "1" : "0"); 403 404 rk3066_hdmi_setup(hdmi, &hdmi->previous_mode); 405 } 406 407 static void rk3066_hdmi_encoder_disable(struct drm_encoder *encoder) 408 { 409 struct rk3066_hdmi *hdmi = to_rk3066_hdmi(encoder); 410 411 DRM_DEV_DEBUG(hdmi->dev, "hdmi encoder disable\n"); 412 413 if (rk3066_hdmi_get_power_mode(hdmi) == HDMI_SYS_POWER_MODE_E) { 414 hdmi_writeb(hdmi, HDMI_VIDEO_CTRL2, 415 HDMI_VIDEO_AUDIO_DISABLE_MASK); 416 hdmi_modb(hdmi, HDMI_VIDEO_CTRL2, 417 HDMI_AUDIO_CP_LOGIC_RESET_MASK, 418 HDMI_AUDIO_CP_LOGIC_RESET); 419 usleep_range(500, 510); 420 } 421 rk3066_hdmi_set_power_mode(hdmi, HDMI_SYS_POWER_MODE_A); 422 } 423 424 static bool 425 rk3066_hdmi_encoder_mode_fixup(struct drm_encoder *encoder, 426 const struct drm_display_mode *mode, 427 struct drm_display_mode *adj_mode) 428 { 429 return true; 430 } 431 432 static int 433 rk3066_hdmi_encoder_atomic_check(struct drm_encoder *encoder, 434 struct drm_crtc_state *crtc_state, 435 struct drm_connector_state *conn_state) 436 { 437 struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state); 438 439 s->output_mode = ROCKCHIP_OUT_MODE_P888; 440 s->output_type = DRM_MODE_CONNECTOR_HDMIA; 441 442 return 0; 443 } 444 445 static const 446 struct drm_encoder_helper_funcs rk3066_hdmi_encoder_helper_funcs = { 447 .enable = rk3066_hdmi_encoder_enable, 448 .disable = rk3066_hdmi_encoder_disable, 449 .mode_fixup = rk3066_hdmi_encoder_mode_fixup, 450 .mode_set = rk3066_hdmi_encoder_mode_set, 451 .atomic_check = rk3066_hdmi_encoder_atomic_check, 452 }; 453 454 static const struct drm_encoder_funcs rk3066_hdmi_encoder_funcs = { 455 .destroy = drm_encoder_cleanup, 456 }; 457 458 static enum drm_connector_status 459 rk3066_hdmi_connector_detect(struct drm_connector *connector, bool force) 460 { 461 struct rk3066_hdmi *hdmi = to_rk3066_hdmi(connector); 462 463 return (hdmi_readb(hdmi, HDMI_HPG_MENS_STA) & HDMI_HPG_IN_STATUS_HIGH) ? 464 connector_status_connected : connector_status_disconnected; 465 } 466 467 static int rk3066_hdmi_connector_get_modes(struct drm_connector *connector) 468 { 469 struct rk3066_hdmi *hdmi = to_rk3066_hdmi(connector); 470 struct edid *edid; 471 int ret = 0; 472 473 if (!hdmi->ddc) 474 return 0; 475 476 edid = drm_get_edid(connector, hdmi->ddc); 477 if (edid) { 478 hdmi->hdmi_data.sink_is_hdmi = drm_detect_hdmi_monitor(edid); 479 drm_connector_update_edid_property(connector, edid); 480 ret = drm_add_edid_modes(connector, edid); 481 kfree(edid); 482 } 483 484 return ret; 485 } 486 487 static enum drm_mode_status 488 rk3066_hdmi_connector_mode_valid(struct drm_connector *connector, 489 struct drm_display_mode *mode) 490 { 491 u32 vic = drm_match_cea_mode(mode); 492 493 if (vic > 1) 494 return MODE_OK; 495 else 496 return MODE_BAD; 497 } 498 499 static struct drm_encoder * 500 rk3066_hdmi_connector_best_encoder(struct drm_connector *connector) 501 { 502 struct rk3066_hdmi *hdmi = to_rk3066_hdmi(connector); 503 504 return &hdmi->encoder; 505 } 506 507 static int 508 rk3066_hdmi_probe_single_connector_modes(struct drm_connector *connector, 509 uint32_t maxX, uint32_t maxY) 510 { 511 if (maxX > 1920) 512 maxX = 1920; 513 if (maxY > 1080) 514 maxY = 1080; 515 516 return drm_helper_probe_single_connector_modes(connector, maxX, maxY); 517 } 518 519 static void rk3066_hdmi_connector_destroy(struct drm_connector *connector) 520 { 521 drm_connector_unregister(connector); 522 drm_connector_cleanup(connector); 523 } 524 525 static const struct drm_connector_funcs rk3066_hdmi_connector_funcs = { 526 .fill_modes = rk3066_hdmi_probe_single_connector_modes, 527 .detect = rk3066_hdmi_connector_detect, 528 .destroy = rk3066_hdmi_connector_destroy, 529 .reset = drm_atomic_helper_connector_reset, 530 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 531 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 532 }; 533 534 static const 535 struct drm_connector_helper_funcs rk3066_hdmi_connector_helper_funcs = { 536 .get_modes = rk3066_hdmi_connector_get_modes, 537 .mode_valid = rk3066_hdmi_connector_mode_valid, 538 .best_encoder = rk3066_hdmi_connector_best_encoder, 539 }; 540 541 static int 542 rk3066_hdmi_register(struct drm_device *drm, struct rk3066_hdmi *hdmi) 543 { 544 struct drm_encoder *encoder = &hdmi->encoder; 545 struct device *dev = hdmi->dev; 546 547 encoder->possible_crtcs = 548 drm_of_find_possible_crtcs(drm, dev->of_node); 549 550 /* 551 * If we failed to find the CRTC(s) which this encoder is 552 * supposed to be connected to, it's because the CRTC has 553 * not been registered yet. Defer probing, and hope that 554 * the required CRTC is added later. 555 */ 556 if (encoder->possible_crtcs == 0) 557 return -EPROBE_DEFER; 558 559 drm_encoder_helper_add(encoder, &rk3066_hdmi_encoder_helper_funcs); 560 drm_encoder_init(drm, encoder, &rk3066_hdmi_encoder_funcs, 561 DRM_MODE_ENCODER_TMDS, NULL); 562 563 hdmi->connector.polled = DRM_CONNECTOR_POLL_HPD; 564 565 drm_connector_helper_add(&hdmi->connector, 566 &rk3066_hdmi_connector_helper_funcs); 567 drm_connector_init_with_ddc(drm, &hdmi->connector, 568 &rk3066_hdmi_connector_funcs, 569 DRM_MODE_CONNECTOR_HDMIA, 570 hdmi->ddc); 571 572 drm_connector_attach_encoder(&hdmi->connector, encoder); 573 574 return 0; 575 } 576 577 static irqreturn_t rk3066_hdmi_hardirq(int irq, void *dev_id) 578 { 579 struct rk3066_hdmi *hdmi = dev_id; 580 irqreturn_t ret = IRQ_NONE; 581 u8 interrupt; 582 583 if (rk3066_hdmi_get_power_mode(hdmi) == HDMI_SYS_POWER_MODE_A) 584 hdmi_writeb(hdmi, HDMI_SYS_CTRL, HDMI_SYS_POWER_MODE_B); 585 586 interrupt = hdmi_readb(hdmi, HDMI_INTR_STATUS1); 587 if (interrupt) 588 hdmi_writeb(hdmi, HDMI_INTR_STATUS1, interrupt); 589 590 if (interrupt & HDMI_INTR_EDID_MASK) { 591 hdmi->i2c->stat = interrupt; 592 complete(&hdmi->i2c->cmpltn); 593 } 594 595 if (interrupt & (HDMI_INTR_HOTPLUG | HDMI_INTR_MSENS)) 596 ret = IRQ_WAKE_THREAD; 597 598 return ret; 599 } 600 601 static irqreturn_t rk3066_hdmi_irq(int irq, void *dev_id) 602 { 603 struct rk3066_hdmi *hdmi = dev_id; 604 605 drm_helper_hpd_irq_event(hdmi->connector.dev); 606 607 return IRQ_HANDLED; 608 } 609 610 static int rk3066_hdmi_i2c_read(struct rk3066_hdmi *hdmi, struct i2c_msg *msgs) 611 { 612 int length = msgs->len; 613 u8 *buf = msgs->buf; 614 int ret; 615 616 ret = wait_for_completion_timeout(&hdmi->i2c->cmpltn, HZ / 10); 617 if (!ret || hdmi->i2c->stat & HDMI_INTR_EDID_ERR) 618 return -EAGAIN; 619 620 while (length--) 621 *buf++ = hdmi_readb(hdmi, HDMI_DDC_READ_FIFO_ADDR); 622 623 return 0; 624 } 625 626 static int rk3066_hdmi_i2c_write(struct rk3066_hdmi *hdmi, struct i2c_msg *msgs) 627 { 628 /* 629 * The DDC module only supports read EDID message, so 630 * we assume that each word write to this i2c adapter 631 * should be the offset of the EDID word address. 632 */ 633 if (msgs->len != 1 || 634 (msgs->addr != DDC_ADDR && msgs->addr != DDC_SEGMENT_ADDR)) 635 return -EINVAL; 636 637 reinit_completion(&hdmi->i2c->cmpltn); 638 639 if (msgs->addr == DDC_SEGMENT_ADDR) 640 hdmi->i2c->segment_addr = msgs->buf[0]; 641 if (msgs->addr == DDC_ADDR) 642 hdmi->i2c->ddc_addr = msgs->buf[0]; 643 644 /* Set edid word address 0x00/0x80. */ 645 hdmi_writeb(hdmi, HDMI_EDID_WORD_ADDR, hdmi->i2c->ddc_addr); 646 647 /* Set edid segment pointer. */ 648 hdmi_writeb(hdmi, HDMI_EDID_SEGMENT_POINTER, hdmi->i2c->segment_addr); 649 650 return 0; 651 } 652 653 static int rk3066_hdmi_i2c_xfer(struct i2c_adapter *adap, 654 struct i2c_msg *msgs, int num) 655 { 656 struct rk3066_hdmi *hdmi = i2c_get_adapdata(adap); 657 struct rk3066_hdmi_i2c *i2c = hdmi->i2c; 658 int i, ret = 0; 659 660 mutex_lock(&i2c->i2c_lock); 661 662 rk3066_hdmi_i2c_init(hdmi); 663 664 /* Unmute HDMI EDID interrupt. */ 665 hdmi_modb(hdmi, HDMI_INTR_MASK1, 666 HDMI_INTR_EDID_MASK, HDMI_INTR_EDID_MASK); 667 i2c->stat = 0; 668 669 for (i = 0; i < num; i++) { 670 DRM_DEV_DEBUG(hdmi->dev, 671 "xfer: num: %d/%d, len: %d, flags: %#x\n", 672 i + 1, num, msgs[i].len, msgs[i].flags); 673 674 if (msgs[i].flags & I2C_M_RD) 675 ret = rk3066_hdmi_i2c_read(hdmi, &msgs[i]); 676 else 677 ret = rk3066_hdmi_i2c_write(hdmi, &msgs[i]); 678 679 if (ret < 0) 680 break; 681 } 682 683 if (!ret) 684 ret = num; 685 686 /* Mute HDMI EDID interrupt. */ 687 hdmi_modb(hdmi, HDMI_INTR_MASK1, HDMI_INTR_EDID_MASK, 0); 688 689 mutex_unlock(&i2c->i2c_lock); 690 691 return ret; 692 } 693 694 static u32 rk3066_hdmi_i2c_func(struct i2c_adapter *adapter) 695 { 696 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; 697 } 698 699 static const struct i2c_algorithm rk3066_hdmi_algorithm = { 700 .master_xfer = rk3066_hdmi_i2c_xfer, 701 .functionality = rk3066_hdmi_i2c_func, 702 }; 703 704 static struct i2c_adapter *rk3066_hdmi_i2c_adapter(struct rk3066_hdmi *hdmi) 705 { 706 struct i2c_adapter *adap; 707 struct rk3066_hdmi_i2c *i2c; 708 int ret; 709 710 i2c = devm_kzalloc(hdmi->dev, sizeof(*i2c), GFP_KERNEL); 711 if (!i2c) 712 return ERR_PTR(-ENOMEM); 713 714 mutex_init(&i2c->i2c_lock); 715 init_completion(&i2c->cmpltn); 716 717 adap = &i2c->adap; 718 adap->class = I2C_CLASS_DDC; 719 adap->owner = THIS_MODULE; 720 adap->dev.parent = hdmi->dev; 721 adap->dev.of_node = hdmi->dev->of_node; 722 adap->algo = &rk3066_hdmi_algorithm; 723 strlcpy(adap->name, "RK3066 HDMI", sizeof(adap->name)); 724 i2c_set_adapdata(adap, hdmi); 725 726 ret = i2c_add_adapter(adap); 727 if (ret) { 728 DRM_DEV_ERROR(hdmi->dev, "cannot add %s I2C adapter\n", 729 adap->name); 730 devm_kfree(hdmi->dev, i2c); 731 return ERR_PTR(ret); 732 } 733 734 hdmi->i2c = i2c; 735 736 DRM_DEV_DEBUG(hdmi->dev, "registered %s I2C bus driver\n", adap->name); 737 738 return adap; 739 } 740 741 static int rk3066_hdmi_bind(struct device *dev, struct device *master, 742 void *data) 743 { 744 struct platform_device *pdev = to_platform_device(dev); 745 struct drm_device *drm = data; 746 struct rk3066_hdmi *hdmi; 747 int irq; 748 int ret; 749 750 hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL); 751 if (!hdmi) 752 return -ENOMEM; 753 754 hdmi->dev = dev; 755 hdmi->drm_dev = drm; 756 hdmi->regs = devm_platform_ioremap_resource(pdev, 0); 757 if (IS_ERR(hdmi->regs)) 758 return PTR_ERR(hdmi->regs); 759 760 irq = platform_get_irq(pdev, 0); 761 if (irq < 0) 762 return irq; 763 764 hdmi->hclk = devm_clk_get(dev, "hclk"); 765 if (IS_ERR(hdmi->hclk)) { 766 DRM_DEV_ERROR(dev, "unable to get HDMI hclk clock\n"); 767 return PTR_ERR(hdmi->hclk); 768 } 769 770 ret = clk_prepare_enable(hdmi->hclk); 771 if (ret) { 772 DRM_DEV_ERROR(dev, "cannot enable HDMI hclk clock: %d\n", ret); 773 return ret; 774 } 775 776 hdmi->grf_regmap = syscon_regmap_lookup_by_phandle(dev->of_node, 777 "rockchip,grf"); 778 if (IS_ERR(hdmi->grf_regmap)) { 779 DRM_DEV_ERROR(dev, "unable to get rockchip,grf\n"); 780 ret = PTR_ERR(hdmi->grf_regmap); 781 goto err_disable_hclk; 782 } 783 784 /* internal hclk = hdmi_hclk / 25 */ 785 hdmi_writeb(hdmi, HDMI_INTERNAL_CLK_DIVIDER, 25); 786 787 hdmi->ddc = rk3066_hdmi_i2c_adapter(hdmi); 788 if (IS_ERR(hdmi->ddc)) { 789 ret = PTR_ERR(hdmi->ddc); 790 hdmi->ddc = NULL; 791 goto err_disable_hclk; 792 } 793 794 rk3066_hdmi_set_power_mode(hdmi, HDMI_SYS_POWER_MODE_B); 795 usleep_range(999, 1000); 796 hdmi_writeb(hdmi, HDMI_INTR_MASK1, HDMI_INTR_HOTPLUG); 797 hdmi_writeb(hdmi, HDMI_INTR_MASK2, 0); 798 hdmi_writeb(hdmi, HDMI_INTR_MASK3, 0); 799 hdmi_writeb(hdmi, HDMI_INTR_MASK4, 0); 800 rk3066_hdmi_set_power_mode(hdmi, HDMI_SYS_POWER_MODE_A); 801 802 ret = rk3066_hdmi_register(drm, hdmi); 803 if (ret) 804 goto err_disable_i2c; 805 806 dev_set_drvdata(dev, hdmi); 807 808 ret = devm_request_threaded_irq(dev, irq, rk3066_hdmi_hardirq, 809 rk3066_hdmi_irq, IRQF_SHARED, 810 dev_name(dev), hdmi); 811 if (ret) { 812 DRM_DEV_ERROR(dev, "failed to request hdmi irq: %d\n", ret); 813 goto err_cleanup_hdmi; 814 } 815 816 return 0; 817 818 err_cleanup_hdmi: 819 hdmi->connector.funcs->destroy(&hdmi->connector); 820 hdmi->encoder.funcs->destroy(&hdmi->encoder); 821 err_disable_i2c: 822 i2c_put_adapter(hdmi->ddc); 823 err_disable_hclk: 824 clk_disable_unprepare(hdmi->hclk); 825 826 return ret; 827 } 828 829 static void rk3066_hdmi_unbind(struct device *dev, struct device *master, 830 void *data) 831 { 832 struct rk3066_hdmi *hdmi = dev_get_drvdata(dev); 833 834 hdmi->connector.funcs->destroy(&hdmi->connector); 835 hdmi->encoder.funcs->destroy(&hdmi->encoder); 836 837 i2c_put_adapter(hdmi->ddc); 838 clk_disable_unprepare(hdmi->hclk); 839 } 840 841 static const struct component_ops rk3066_hdmi_ops = { 842 .bind = rk3066_hdmi_bind, 843 .unbind = rk3066_hdmi_unbind, 844 }; 845 846 static int rk3066_hdmi_probe(struct platform_device *pdev) 847 { 848 return component_add(&pdev->dev, &rk3066_hdmi_ops); 849 } 850 851 static int rk3066_hdmi_remove(struct platform_device *pdev) 852 { 853 component_del(&pdev->dev, &rk3066_hdmi_ops); 854 855 return 0; 856 } 857 858 static const struct of_device_id rk3066_hdmi_dt_ids[] = { 859 { .compatible = "rockchip,rk3066-hdmi" }, 860 { /* sentinel */ }, 861 }; 862 MODULE_DEVICE_TABLE(of, rk3066_hdmi_dt_ids); 863 864 struct platform_driver rk3066_hdmi_driver = { 865 .probe = rk3066_hdmi_probe, 866 .remove = rk3066_hdmi_remove, 867 .driver = { 868 .name = "rockchip-rk3066-hdmi", 869 .of_match_table = rk3066_hdmi_dt_ids, 870 }, 871 }; 872