1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd 4 * Zheng Yang <zhengyang@rock-chips.com> 5 * Yakir Yang <ykk@rock-chips.com> 6 */ 7 8 #include <linux/irq.h> 9 #include <linux/clk.h> 10 #include <linux/delay.h> 11 #include <linux/err.h> 12 #include <linux/hdmi.h> 13 #include <linux/mfd/syscon.h> 14 #include <linux/mod_devicetable.h> 15 #include <linux/module.h> 16 #include <linux/mutex.h> 17 #include <linux/platform_device.h> 18 19 #include <drm/drm_atomic_helper.h> 20 #include <drm/drm_edid.h> 21 #include <drm/drm_of.h> 22 #include <drm/drm_probe_helper.h> 23 #include <drm/drm_simple_kms_helper.h> 24 25 #include "rockchip_drm_drv.h" 26 27 #include "inno_hdmi.h" 28 29 struct hdmi_data_info { 30 int vic; 31 bool sink_has_audio; 32 unsigned int enc_in_format; 33 unsigned int enc_out_format; 34 unsigned int colorimetry; 35 }; 36 37 struct inno_hdmi_i2c { 38 struct i2c_adapter adap; 39 40 u8 ddc_addr; 41 u8 segment_addr; 42 43 struct mutex lock; 44 struct completion cmp; 45 }; 46 47 struct inno_hdmi { 48 struct device *dev; 49 struct drm_device *drm_dev; 50 51 int irq; 52 struct clk *pclk; 53 void __iomem *regs; 54 55 struct drm_connector connector; 56 struct rockchip_encoder encoder; 57 58 struct inno_hdmi_i2c *i2c; 59 struct i2c_adapter *ddc; 60 61 unsigned int tmds_rate; 62 63 struct hdmi_data_info hdmi_data; 64 struct drm_display_mode previous_mode; 65 }; 66 67 static struct inno_hdmi *encoder_to_inno_hdmi(struct drm_encoder *encoder) 68 { 69 struct rockchip_encoder *rkencoder = to_rockchip_encoder(encoder); 70 71 return container_of(rkencoder, struct inno_hdmi, encoder); 72 } 73 74 static struct inno_hdmi *connector_to_inno_hdmi(struct drm_connector *connector) 75 { 76 return container_of(connector, struct inno_hdmi, connector); 77 } 78 79 enum { 80 CSC_ITU601_16_235_TO_RGB_0_255_8BIT, 81 CSC_ITU601_0_255_TO_RGB_0_255_8BIT, 82 CSC_ITU709_16_235_TO_RGB_0_255_8BIT, 83 CSC_RGB_0_255_TO_ITU601_16_235_8BIT, 84 CSC_RGB_0_255_TO_ITU709_16_235_8BIT, 85 CSC_RGB_0_255_TO_RGB_16_235_8BIT, 86 }; 87 88 static const char coeff_csc[][24] = { 89 /* 90 * YUV2RGB:601 SD mode(Y[16:235], UV[16:240], RGB[0:255]): 91 * R = 1.164*Y + 1.596*V - 204 92 * G = 1.164*Y - 0.391*U - 0.813*V + 154 93 * B = 1.164*Y + 2.018*U - 258 94 */ 95 { 96 0x04, 0xa7, 0x00, 0x00, 0x06, 0x62, 0x02, 0xcc, 97 0x04, 0xa7, 0x11, 0x90, 0x13, 0x40, 0x00, 0x9a, 98 0x04, 0xa7, 0x08, 0x12, 0x00, 0x00, 0x03, 0x02 99 }, 100 /* 101 * YUV2RGB:601 SD mode(YUV[0:255],RGB[0:255]): 102 * R = Y + 1.402*V - 248 103 * G = Y - 0.344*U - 0.714*V + 135 104 * B = Y + 1.772*U - 227 105 */ 106 { 107 0x04, 0x00, 0x00, 0x00, 0x05, 0x9b, 0x02, 0xf8, 108 0x04, 0x00, 0x11, 0x60, 0x12, 0xdb, 0x00, 0x87, 109 0x04, 0x00, 0x07, 0x16, 0x00, 0x00, 0x02, 0xe3 110 }, 111 /* 112 * YUV2RGB:709 HD mode(Y[16:235],UV[16:240],RGB[0:255]): 113 * R = 1.164*Y + 1.793*V - 248 114 * G = 1.164*Y - 0.213*U - 0.534*V + 77 115 * B = 1.164*Y + 2.115*U - 289 116 */ 117 { 118 0x04, 0xa7, 0x00, 0x00, 0x07, 0x2c, 0x02, 0xf8, 119 0x04, 0xa7, 0x10, 0xda, 0x12, 0x22, 0x00, 0x4d, 120 0x04, 0xa7, 0x08, 0x74, 0x00, 0x00, 0x03, 0x21 121 }, 122 123 /* 124 * RGB2YUV:601 SD mode: 125 * Cb = -0.291G - 0.148R + 0.439B + 128 126 * Y = 0.504G + 0.257R + 0.098B + 16 127 * Cr = -0.368G + 0.439R - 0.071B + 128 128 */ 129 { 130 0x11, 0x5f, 0x01, 0x82, 0x10, 0x23, 0x00, 0x80, 131 0x02, 0x1c, 0x00, 0xa1, 0x00, 0x36, 0x00, 0x1e, 132 0x11, 0x29, 0x10, 0x59, 0x01, 0x82, 0x00, 0x80 133 }, 134 /* 135 * RGB2YUV:709 HD mode: 136 * Cb = - 0.338G - 0.101R + 0.439B + 128 137 * Y = 0.614G + 0.183R + 0.062B + 16 138 * Cr = - 0.399G + 0.439R - 0.040B + 128 139 */ 140 { 141 0x11, 0x98, 0x01, 0xc1, 0x10, 0x28, 0x00, 0x80, 142 0x02, 0x74, 0x00, 0xbb, 0x00, 0x3f, 0x00, 0x10, 143 0x11, 0x5a, 0x10, 0x67, 0x01, 0xc1, 0x00, 0x80 144 }, 145 /* 146 * RGB[0:255]2RGB[16:235]: 147 * R' = R x (235-16)/255 + 16; 148 * G' = G x (235-16)/255 + 16; 149 * B' = B x (235-16)/255 + 16; 150 */ 151 { 152 0x00, 0x00, 0x03, 0x6F, 0x00, 0x00, 0x00, 0x10, 153 0x03, 0x6F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 154 0x00, 0x00, 0x00, 0x00, 0x03, 0x6F, 0x00, 0x10 155 }, 156 }; 157 158 static inline u8 hdmi_readb(struct inno_hdmi *hdmi, u16 offset) 159 { 160 return readl_relaxed(hdmi->regs + (offset) * 0x04); 161 } 162 163 static inline void hdmi_writeb(struct inno_hdmi *hdmi, u16 offset, u32 val) 164 { 165 writel_relaxed(val, hdmi->regs + (offset) * 0x04); 166 } 167 168 static inline void hdmi_modb(struct inno_hdmi *hdmi, u16 offset, 169 u32 msk, u32 val) 170 { 171 u8 temp = hdmi_readb(hdmi, offset) & ~msk; 172 173 temp |= val & msk; 174 hdmi_writeb(hdmi, offset, temp); 175 } 176 177 static void inno_hdmi_i2c_init(struct inno_hdmi *hdmi) 178 { 179 int ddc_bus_freq; 180 181 ddc_bus_freq = (hdmi->tmds_rate >> 2) / HDMI_SCL_RATE; 182 183 hdmi_writeb(hdmi, DDC_BUS_FREQ_L, ddc_bus_freq & 0xFF); 184 hdmi_writeb(hdmi, DDC_BUS_FREQ_H, (ddc_bus_freq >> 8) & 0xFF); 185 186 /* Clear the EDID interrupt flag and mute the interrupt */ 187 hdmi_writeb(hdmi, HDMI_INTERRUPT_MASK1, 0); 188 hdmi_writeb(hdmi, HDMI_INTERRUPT_STATUS1, m_INT_EDID_READY); 189 } 190 191 static void inno_hdmi_sys_power(struct inno_hdmi *hdmi, bool enable) 192 { 193 if (enable) 194 hdmi_modb(hdmi, HDMI_SYS_CTRL, m_POWER, v_PWR_ON); 195 else 196 hdmi_modb(hdmi, HDMI_SYS_CTRL, m_POWER, v_PWR_OFF); 197 } 198 199 static void inno_hdmi_set_pwr_mode(struct inno_hdmi *hdmi, int mode) 200 { 201 switch (mode) { 202 case NORMAL: 203 inno_hdmi_sys_power(hdmi, false); 204 205 hdmi_writeb(hdmi, HDMI_PHY_PRE_EMPHASIS, 0x6f); 206 hdmi_writeb(hdmi, HDMI_PHY_DRIVER, 0xbb); 207 208 hdmi_writeb(hdmi, HDMI_PHY_SYS_CTL, 0x15); 209 hdmi_writeb(hdmi, HDMI_PHY_SYS_CTL, 0x14); 210 hdmi_writeb(hdmi, HDMI_PHY_SYS_CTL, 0x10); 211 hdmi_writeb(hdmi, HDMI_PHY_CHG_PWR, 0x0f); 212 hdmi_writeb(hdmi, HDMI_PHY_SYNC, 0x00); 213 hdmi_writeb(hdmi, HDMI_PHY_SYNC, 0x01); 214 215 inno_hdmi_sys_power(hdmi, true); 216 break; 217 218 case LOWER_PWR: 219 inno_hdmi_sys_power(hdmi, false); 220 hdmi_writeb(hdmi, HDMI_PHY_DRIVER, 0x00); 221 hdmi_writeb(hdmi, HDMI_PHY_PRE_EMPHASIS, 0x00); 222 hdmi_writeb(hdmi, HDMI_PHY_CHG_PWR, 0x00); 223 hdmi_writeb(hdmi, HDMI_PHY_SYS_CTL, 0x15); 224 225 break; 226 227 default: 228 DRM_DEV_ERROR(hdmi->dev, "Unknown power mode %d\n", mode); 229 } 230 } 231 232 static void inno_hdmi_reset(struct inno_hdmi *hdmi) 233 { 234 u32 val; 235 u32 msk; 236 237 hdmi_modb(hdmi, HDMI_SYS_CTRL, m_RST_DIGITAL, v_NOT_RST_DIGITAL); 238 udelay(100); 239 240 hdmi_modb(hdmi, HDMI_SYS_CTRL, m_RST_ANALOG, v_NOT_RST_ANALOG); 241 udelay(100); 242 243 msk = m_REG_CLK_INV | m_REG_CLK_SOURCE | m_POWER | m_INT_POL; 244 val = v_REG_CLK_INV | v_REG_CLK_SOURCE_SYS | v_PWR_ON | v_INT_POL_HIGH; 245 hdmi_modb(hdmi, HDMI_SYS_CTRL, msk, val); 246 247 inno_hdmi_set_pwr_mode(hdmi, NORMAL); 248 } 249 250 static int inno_hdmi_upload_frame(struct inno_hdmi *hdmi, int setup_rc, 251 union hdmi_infoframe *frame, u32 frame_index, 252 u32 mask, u32 disable, u32 enable) 253 { 254 if (mask) 255 hdmi_modb(hdmi, HDMI_PACKET_SEND_AUTO, mask, disable); 256 257 hdmi_writeb(hdmi, HDMI_CONTROL_PACKET_BUF_INDEX, frame_index); 258 259 if (setup_rc >= 0) { 260 u8 packed_frame[HDMI_MAXIMUM_INFO_FRAME_SIZE]; 261 ssize_t rc, i; 262 263 rc = hdmi_infoframe_pack(frame, packed_frame, 264 sizeof(packed_frame)); 265 if (rc < 0) 266 return rc; 267 268 for (i = 0; i < rc; i++) 269 hdmi_writeb(hdmi, HDMI_CONTROL_PACKET_ADDR + i, 270 packed_frame[i]); 271 272 if (mask) 273 hdmi_modb(hdmi, HDMI_PACKET_SEND_AUTO, mask, enable); 274 } 275 276 return setup_rc; 277 } 278 279 static int inno_hdmi_config_video_vsi(struct inno_hdmi *hdmi, 280 struct drm_display_mode *mode) 281 { 282 union hdmi_infoframe frame; 283 int rc; 284 285 rc = drm_hdmi_vendor_infoframe_from_display_mode(&frame.vendor.hdmi, 286 &hdmi->connector, 287 mode); 288 289 return inno_hdmi_upload_frame(hdmi, rc, &frame, INFOFRAME_VSI, 290 m_PACKET_VSI_EN, v_PACKET_VSI_EN(0), v_PACKET_VSI_EN(1)); 291 } 292 293 static int inno_hdmi_config_video_avi(struct inno_hdmi *hdmi, 294 struct drm_display_mode *mode) 295 { 296 union hdmi_infoframe frame; 297 int rc; 298 299 rc = drm_hdmi_avi_infoframe_from_display_mode(&frame.avi, 300 &hdmi->connector, 301 mode); 302 303 if (hdmi->hdmi_data.enc_out_format == HDMI_COLORSPACE_YUV444) 304 frame.avi.colorspace = HDMI_COLORSPACE_YUV444; 305 else if (hdmi->hdmi_data.enc_out_format == HDMI_COLORSPACE_YUV422) 306 frame.avi.colorspace = HDMI_COLORSPACE_YUV422; 307 else 308 frame.avi.colorspace = HDMI_COLORSPACE_RGB; 309 310 return inno_hdmi_upload_frame(hdmi, rc, &frame, INFOFRAME_AVI, 0, 0, 0); 311 } 312 313 static int inno_hdmi_config_video_csc(struct inno_hdmi *hdmi) 314 { 315 struct hdmi_data_info *data = &hdmi->hdmi_data; 316 int c0_c2_change = 0; 317 int csc_enable = 0; 318 int csc_mode = 0; 319 int auto_csc = 0; 320 int value; 321 int i; 322 323 /* Input video mode is SDR RGB24bit, data enable signal from external */ 324 hdmi_writeb(hdmi, HDMI_VIDEO_CONTRL1, v_DE_EXTERNAL | 325 v_VIDEO_INPUT_FORMAT(VIDEO_INPUT_SDR_RGB444)); 326 327 /* Input color hardcode to RGB, and output color hardcode to RGB888 */ 328 value = v_VIDEO_INPUT_BITS(VIDEO_INPUT_8BITS) | 329 v_VIDEO_OUTPUT_COLOR(0) | 330 v_VIDEO_INPUT_CSP(0); 331 hdmi_writeb(hdmi, HDMI_VIDEO_CONTRL2, value); 332 333 if (data->enc_in_format == data->enc_out_format) { 334 if ((data->enc_in_format == HDMI_COLORSPACE_RGB) || 335 (data->enc_in_format >= HDMI_COLORSPACE_YUV444)) { 336 value = v_SOF_DISABLE | v_COLOR_DEPTH_NOT_INDICATED(1); 337 hdmi_writeb(hdmi, HDMI_VIDEO_CONTRL3, value); 338 339 hdmi_modb(hdmi, HDMI_VIDEO_CONTRL, 340 m_VIDEO_AUTO_CSC | m_VIDEO_C0_C2_SWAP, 341 v_VIDEO_AUTO_CSC(AUTO_CSC_DISABLE) | 342 v_VIDEO_C0_C2_SWAP(C0_C2_CHANGE_DISABLE)); 343 return 0; 344 } 345 } 346 347 if (data->colorimetry == HDMI_COLORIMETRY_ITU_601) { 348 if ((data->enc_in_format == HDMI_COLORSPACE_RGB) && 349 (data->enc_out_format == HDMI_COLORSPACE_YUV444)) { 350 csc_mode = CSC_RGB_0_255_TO_ITU601_16_235_8BIT; 351 auto_csc = AUTO_CSC_DISABLE; 352 c0_c2_change = C0_C2_CHANGE_DISABLE; 353 csc_enable = v_CSC_ENABLE; 354 } else if ((data->enc_in_format == HDMI_COLORSPACE_YUV444) && 355 (data->enc_out_format == HDMI_COLORSPACE_RGB)) { 356 csc_mode = CSC_ITU601_16_235_TO_RGB_0_255_8BIT; 357 auto_csc = AUTO_CSC_ENABLE; 358 c0_c2_change = C0_C2_CHANGE_DISABLE; 359 csc_enable = v_CSC_DISABLE; 360 } 361 } else { 362 if ((data->enc_in_format == HDMI_COLORSPACE_RGB) && 363 (data->enc_out_format == HDMI_COLORSPACE_YUV444)) { 364 csc_mode = CSC_RGB_0_255_TO_ITU709_16_235_8BIT; 365 auto_csc = AUTO_CSC_DISABLE; 366 c0_c2_change = C0_C2_CHANGE_DISABLE; 367 csc_enable = v_CSC_ENABLE; 368 } else if ((data->enc_in_format == HDMI_COLORSPACE_YUV444) && 369 (data->enc_out_format == HDMI_COLORSPACE_RGB)) { 370 csc_mode = CSC_ITU709_16_235_TO_RGB_0_255_8BIT; 371 auto_csc = AUTO_CSC_ENABLE; 372 c0_c2_change = C0_C2_CHANGE_DISABLE; 373 csc_enable = v_CSC_DISABLE; 374 } 375 } 376 377 for (i = 0; i < 24; i++) 378 hdmi_writeb(hdmi, HDMI_VIDEO_CSC_COEF + i, 379 coeff_csc[csc_mode][i]); 380 381 value = v_SOF_DISABLE | csc_enable | v_COLOR_DEPTH_NOT_INDICATED(1); 382 hdmi_writeb(hdmi, HDMI_VIDEO_CONTRL3, value); 383 hdmi_modb(hdmi, HDMI_VIDEO_CONTRL, m_VIDEO_AUTO_CSC | 384 m_VIDEO_C0_C2_SWAP, v_VIDEO_AUTO_CSC(auto_csc) | 385 v_VIDEO_C0_C2_SWAP(c0_c2_change)); 386 387 return 0; 388 } 389 390 static int inno_hdmi_config_video_timing(struct inno_hdmi *hdmi, 391 struct drm_display_mode *mode) 392 { 393 int value; 394 395 /* Set detail external video timing polarity and interlace mode */ 396 value = v_EXTERANL_VIDEO(1); 397 value |= mode->flags & DRM_MODE_FLAG_PHSYNC ? 398 v_HSYNC_POLARITY(1) : v_HSYNC_POLARITY(0); 399 value |= mode->flags & DRM_MODE_FLAG_PVSYNC ? 400 v_VSYNC_POLARITY(1) : v_VSYNC_POLARITY(0); 401 value |= mode->flags & DRM_MODE_FLAG_INTERLACE ? 402 v_INETLACE(1) : v_INETLACE(0); 403 hdmi_writeb(hdmi, HDMI_VIDEO_TIMING_CTL, value); 404 405 /* Set detail external video timing */ 406 value = mode->htotal; 407 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HTOTAL_L, value & 0xFF); 408 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HTOTAL_H, (value >> 8) & 0xFF); 409 410 value = mode->htotal - mode->hdisplay; 411 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HBLANK_L, value & 0xFF); 412 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HBLANK_H, (value >> 8) & 0xFF); 413 414 value = mode->hsync_start - mode->hdisplay; 415 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HDELAY_L, value & 0xFF); 416 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HDELAY_H, (value >> 8) & 0xFF); 417 418 value = mode->hsync_end - mode->hsync_start; 419 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HDURATION_L, value & 0xFF); 420 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HDURATION_H, (value >> 8) & 0xFF); 421 422 value = mode->vtotal; 423 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VTOTAL_L, value & 0xFF); 424 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VTOTAL_H, (value >> 8) & 0xFF); 425 426 value = mode->vtotal - mode->vdisplay; 427 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VBLANK, value & 0xFF); 428 429 value = mode->vsync_start - mode->vdisplay; 430 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VDELAY, value & 0xFF); 431 432 value = mode->vsync_end - mode->vsync_start; 433 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VDURATION, value & 0xFF); 434 435 hdmi_writeb(hdmi, HDMI_PHY_PRE_DIV_RATIO, 0x1e); 436 hdmi_writeb(hdmi, HDMI_PHY_FEEDBACK_DIV_RATIO_LOW, 0x2c); 437 hdmi_writeb(hdmi, HDMI_PHY_FEEDBACK_DIV_RATIO_HIGH, 0x01); 438 439 return 0; 440 } 441 442 static int inno_hdmi_setup(struct inno_hdmi *hdmi, 443 struct drm_display_mode *mode) 444 { 445 struct drm_display_info *display = &hdmi->connector.display_info; 446 447 hdmi->hdmi_data.vic = drm_match_cea_mode(mode); 448 449 hdmi->hdmi_data.enc_in_format = HDMI_COLORSPACE_RGB; 450 hdmi->hdmi_data.enc_out_format = HDMI_COLORSPACE_RGB; 451 452 if ((hdmi->hdmi_data.vic == 6) || (hdmi->hdmi_data.vic == 7) || 453 (hdmi->hdmi_data.vic == 21) || (hdmi->hdmi_data.vic == 22) || 454 (hdmi->hdmi_data.vic == 2) || (hdmi->hdmi_data.vic == 3) || 455 (hdmi->hdmi_data.vic == 17) || (hdmi->hdmi_data.vic == 18)) 456 hdmi->hdmi_data.colorimetry = HDMI_COLORIMETRY_ITU_601; 457 else 458 hdmi->hdmi_data.colorimetry = HDMI_COLORIMETRY_ITU_709; 459 460 /* Mute video and audio output */ 461 hdmi_modb(hdmi, HDMI_AV_MUTE, m_AUDIO_MUTE | m_VIDEO_BLACK, 462 v_AUDIO_MUTE(1) | v_VIDEO_MUTE(1)); 463 464 /* Set HDMI Mode */ 465 hdmi_writeb(hdmi, HDMI_HDCP_CTRL, 466 v_HDMI_DVI(display->is_hdmi)); 467 468 inno_hdmi_config_video_timing(hdmi, mode); 469 470 inno_hdmi_config_video_csc(hdmi); 471 472 if (display->is_hdmi) { 473 inno_hdmi_config_video_avi(hdmi, mode); 474 inno_hdmi_config_video_vsi(hdmi, mode); 475 } 476 477 /* 478 * When IP controller have configured to an accurate video 479 * timing, then the TMDS clock source would be switched to 480 * DCLK_LCDC, so we need to init the TMDS rate to mode pixel 481 * clock rate, and reconfigure the DDC clock. 482 */ 483 hdmi->tmds_rate = mode->clock * 1000; 484 inno_hdmi_i2c_init(hdmi); 485 486 /* Unmute video and audio output */ 487 hdmi_modb(hdmi, HDMI_AV_MUTE, m_AUDIO_MUTE | m_VIDEO_BLACK, 488 v_AUDIO_MUTE(0) | v_VIDEO_MUTE(0)); 489 490 return 0; 491 } 492 493 static void inno_hdmi_encoder_mode_set(struct drm_encoder *encoder, 494 struct drm_display_mode *mode, 495 struct drm_display_mode *adj_mode) 496 { 497 struct inno_hdmi *hdmi = encoder_to_inno_hdmi(encoder); 498 499 inno_hdmi_setup(hdmi, adj_mode); 500 501 /* Store the display mode for plugin/DPMS poweron events */ 502 drm_mode_copy(&hdmi->previous_mode, adj_mode); 503 } 504 505 static void inno_hdmi_encoder_enable(struct drm_encoder *encoder) 506 { 507 struct inno_hdmi *hdmi = encoder_to_inno_hdmi(encoder); 508 509 inno_hdmi_set_pwr_mode(hdmi, NORMAL); 510 } 511 512 static void inno_hdmi_encoder_disable(struct drm_encoder *encoder) 513 { 514 struct inno_hdmi *hdmi = encoder_to_inno_hdmi(encoder); 515 516 inno_hdmi_set_pwr_mode(hdmi, LOWER_PWR); 517 } 518 519 static bool inno_hdmi_encoder_mode_fixup(struct drm_encoder *encoder, 520 const struct drm_display_mode *mode, 521 struct drm_display_mode *adj_mode) 522 { 523 return true; 524 } 525 526 static int 527 inno_hdmi_encoder_atomic_check(struct drm_encoder *encoder, 528 struct drm_crtc_state *crtc_state, 529 struct drm_connector_state *conn_state) 530 { 531 struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state); 532 533 s->output_mode = ROCKCHIP_OUT_MODE_P888; 534 s->output_type = DRM_MODE_CONNECTOR_HDMIA; 535 536 return 0; 537 } 538 539 static struct drm_encoder_helper_funcs inno_hdmi_encoder_helper_funcs = { 540 .enable = inno_hdmi_encoder_enable, 541 .disable = inno_hdmi_encoder_disable, 542 .mode_fixup = inno_hdmi_encoder_mode_fixup, 543 .mode_set = inno_hdmi_encoder_mode_set, 544 .atomic_check = inno_hdmi_encoder_atomic_check, 545 }; 546 547 static enum drm_connector_status 548 inno_hdmi_connector_detect(struct drm_connector *connector, bool force) 549 { 550 struct inno_hdmi *hdmi = connector_to_inno_hdmi(connector); 551 552 return (hdmi_readb(hdmi, HDMI_STATUS) & m_HOTPLUG) ? 553 connector_status_connected : connector_status_disconnected; 554 } 555 556 static int inno_hdmi_connector_get_modes(struct drm_connector *connector) 557 { 558 struct inno_hdmi *hdmi = connector_to_inno_hdmi(connector); 559 struct edid *edid; 560 int ret = 0; 561 562 if (!hdmi->ddc) 563 return 0; 564 565 edid = drm_get_edid(connector, hdmi->ddc); 566 if (edid) { 567 hdmi->hdmi_data.sink_has_audio = drm_detect_monitor_audio(edid); 568 drm_connector_update_edid_property(connector, edid); 569 ret = drm_add_edid_modes(connector, edid); 570 kfree(edid); 571 } 572 573 return ret; 574 } 575 576 static enum drm_mode_status 577 inno_hdmi_connector_mode_valid(struct drm_connector *connector, 578 struct drm_display_mode *mode) 579 { 580 return MODE_OK; 581 } 582 583 static int 584 inno_hdmi_probe_single_connector_modes(struct drm_connector *connector, 585 uint32_t maxX, uint32_t maxY) 586 { 587 return drm_helper_probe_single_connector_modes(connector, 1920, 1080); 588 } 589 590 static void inno_hdmi_connector_destroy(struct drm_connector *connector) 591 { 592 drm_connector_unregister(connector); 593 drm_connector_cleanup(connector); 594 } 595 596 static const struct drm_connector_funcs inno_hdmi_connector_funcs = { 597 .fill_modes = inno_hdmi_probe_single_connector_modes, 598 .detect = inno_hdmi_connector_detect, 599 .destroy = inno_hdmi_connector_destroy, 600 .reset = drm_atomic_helper_connector_reset, 601 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 602 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 603 }; 604 605 static struct drm_connector_helper_funcs inno_hdmi_connector_helper_funcs = { 606 .get_modes = inno_hdmi_connector_get_modes, 607 .mode_valid = inno_hdmi_connector_mode_valid, 608 }; 609 610 static int inno_hdmi_register(struct drm_device *drm, struct inno_hdmi *hdmi) 611 { 612 struct drm_encoder *encoder = &hdmi->encoder.encoder; 613 struct device *dev = hdmi->dev; 614 615 encoder->possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node); 616 617 /* 618 * If we failed to find the CRTC(s) which this encoder is 619 * supposed to be connected to, it's because the CRTC has 620 * not been registered yet. Defer probing, and hope that 621 * the required CRTC is added later. 622 */ 623 if (encoder->possible_crtcs == 0) 624 return -EPROBE_DEFER; 625 626 drm_encoder_helper_add(encoder, &inno_hdmi_encoder_helper_funcs); 627 drm_simple_encoder_init(drm, encoder, DRM_MODE_ENCODER_TMDS); 628 629 hdmi->connector.polled = DRM_CONNECTOR_POLL_HPD; 630 631 drm_connector_helper_add(&hdmi->connector, 632 &inno_hdmi_connector_helper_funcs); 633 drm_connector_init_with_ddc(drm, &hdmi->connector, 634 &inno_hdmi_connector_funcs, 635 DRM_MODE_CONNECTOR_HDMIA, 636 hdmi->ddc); 637 638 drm_connector_attach_encoder(&hdmi->connector, encoder); 639 640 return 0; 641 } 642 643 static irqreturn_t inno_hdmi_i2c_irq(struct inno_hdmi *hdmi) 644 { 645 struct inno_hdmi_i2c *i2c = hdmi->i2c; 646 u8 stat; 647 648 stat = hdmi_readb(hdmi, HDMI_INTERRUPT_STATUS1); 649 if (!(stat & m_INT_EDID_READY)) 650 return IRQ_NONE; 651 652 /* Clear HDMI EDID interrupt flag */ 653 hdmi_writeb(hdmi, HDMI_INTERRUPT_STATUS1, m_INT_EDID_READY); 654 655 complete(&i2c->cmp); 656 657 return IRQ_HANDLED; 658 } 659 660 static irqreturn_t inno_hdmi_hardirq(int irq, void *dev_id) 661 { 662 struct inno_hdmi *hdmi = dev_id; 663 irqreturn_t ret = IRQ_NONE; 664 u8 interrupt; 665 666 if (hdmi->i2c) 667 ret = inno_hdmi_i2c_irq(hdmi); 668 669 interrupt = hdmi_readb(hdmi, HDMI_STATUS); 670 if (interrupt & m_INT_HOTPLUG) { 671 hdmi_modb(hdmi, HDMI_STATUS, m_INT_HOTPLUG, m_INT_HOTPLUG); 672 ret = IRQ_WAKE_THREAD; 673 } 674 675 return ret; 676 } 677 678 static irqreturn_t inno_hdmi_irq(int irq, void *dev_id) 679 { 680 struct inno_hdmi *hdmi = dev_id; 681 682 drm_helper_hpd_irq_event(hdmi->connector.dev); 683 684 return IRQ_HANDLED; 685 } 686 687 static int inno_hdmi_i2c_read(struct inno_hdmi *hdmi, struct i2c_msg *msgs) 688 { 689 int length = msgs->len; 690 u8 *buf = msgs->buf; 691 int ret; 692 693 ret = wait_for_completion_timeout(&hdmi->i2c->cmp, HZ / 10); 694 if (!ret) 695 return -EAGAIN; 696 697 while (length--) 698 *buf++ = hdmi_readb(hdmi, HDMI_EDID_FIFO_ADDR); 699 700 return 0; 701 } 702 703 static int inno_hdmi_i2c_write(struct inno_hdmi *hdmi, struct i2c_msg *msgs) 704 { 705 /* 706 * The DDC module only support read EDID message, so 707 * we assume that each word write to this i2c adapter 708 * should be the offset of EDID word address. 709 */ 710 if ((msgs->len != 1) || 711 ((msgs->addr != DDC_ADDR) && (msgs->addr != DDC_SEGMENT_ADDR))) 712 return -EINVAL; 713 714 reinit_completion(&hdmi->i2c->cmp); 715 716 if (msgs->addr == DDC_SEGMENT_ADDR) 717 hdmi->i2c->segment_addr = msgs->buf[0]; 718 if (msgs->addr == DDC_ADDR) 719 hdmi->i2c->ddc_addr = msgs->buf[0]; 720 721 /* Set edid fifo first addr */ 722 hdmi_writeb(hdmi, HDMI_EDID_FIFO_OFFSET, 0x00); 723 724 /* Set edid word address 0x00/0x80 */ 725 hdmi_writeb(hdmi, HDMI_EDID_WORD_ADDR, hdmi->i2c->ddc_addr); 726 727 /* Set edid segment pointer */ 728 hdmi_writeb(hdmi, HDMI_EDID_SEGMENT_POINTER, hdmi->i2c->segment_addr); 729 730 return 0; 731 } 732 733 static int inno_hdmi_i2c_xfer(struct i2c_adapter *adap, 734 struct i2c_msg *msgs, int num) 735 { 736 struct inno_hdmi *hdmi = i2c_get_adapdata(adap); 737 struct inno_hdmi_i2c *i2c = hdmi->i2c; 738 int i, ret = 0; 739 740 mutex_lock(&i2c->lock); 741 742 /* Clear the EDID interrupt flag and unmute the interrupt */ 743 hdmi_writeb(hdmi, HDMI_INTERRUPT_MASK1, m_INT_EDID_READY); 744 hdmi_writeb(hdmi, HDMI_INTERRUPT_STATUS1, m_INT_EDID_READY); 745 746 for (i = 0; i < num; i++) { 747 DRM_DEV_DEBUG(hdmi->dev, 748 "xfer: num: %d/%d, len: %d, flags: %#x\n", 749 i + 1, num, msgs[i].len, msgs[i].flags); 750 751 if (msgs[i].flags & I2C_M_RD) 752 ret = inno_hdmi_i2c_read(hdmi, &msgs[i]); 753 else 754 ret = inno_hdmi_i2c_write(hdmi, &msgs[i]); 755 756 if (ret < 0) 757 break; 758 } 759 760 if (!ret) 761 ret = num; 762 763 /* Mute HDMI EDID interrupt */ 764 hdmi_writeb(hdmi, HDMI_INTERRUPT_MASK1, 0); 765 766 mutex_unlock(&i2c->lock); 767 768 return ret; 769 } 770 771 static u32 inno_hdmi_i2c_func(struct i2c_adapter *adapter) 772 { 773 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; 774 } 775 776 static const struct i2c_algorithm inno_hdmi_algorithm = { 777 .master_xfer = inno_hdmi_i2c_xfer, 778 .functionality = inno_hdmi_i2c_func, 779 }; 780 781 static struct i2c_adapter *inno_hdmi_i2c_adapter(struct inno_hdmi *hdmi) 782 { 783 struct i2c_adapter *adap; 784 struct inno_hdmi_i2c *i2c; 785 int ret; 786 787 i2c = devm_kzalloc(hdmi->dev, sizeof(*i2c), GFP_KERNEL); 788 if (!i2c) 789 return ERR_PTR(-ENOMEM); 790 791 mutex_init(&i2c->lock); 792 init_completion(&i2c->cmp); 793 794 adap = &i2c->adap; 795 adap->class = I2C_CLASS_DDC; 796 adap->owner = THIS_MODULE; 797 adap->dev.parent = hdmi->dev; 798 adap->dev.of_node = hdmi->dev->of_node; 799 adap->algo = &inno_hdmi_algorithm; 800 strscpy(adap->name, "Inno HDMI", sizeof(adap->name)); 801 i2c_set_adapdata(adap, hdmi); 802 803 ret = i2c_add_adapter(adap); 804 if (ret) { 805 dev_warn(hdmi->dev, "cannot add %s I2C adapter\n", adap->name); 806 devm_kfree(hdmi->dev, i2c); 807 return ERR_PTR(ret); 808 } 809 810 hdmi->i2c = i2c; 811 812 DRM_DEV_INFO(hdmi->dev, "registered %s I2C bus driver\n", adap->name); 813 814 return adap; 815 } 816 817 static int inno_hdmi_bind(struct device *dev, struct device *master, 818 void *data) 819 { 820 struct platform_device *pdev = to_platform_device(dev); 821 struct drm_device *drm = data; 822 struct inno_hdmi *hdmi; 823 int irq; 824 int ret; 825 826 hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL); 827 if (!hdmi) 828 return -ENOMEM; 829 830 hdmi->dev = dev; 831 hdmi->drm_dev = drm; 832 833 hdmi->regs = devm_platform_ioremap_resource(pdev, 0); 834 if (IS_ERR(hdmi->regs)) 835 return PTR_ERR(hdmi->regs); 836 837 hdmi->pclk = devm_clk_get(hdmi->dev, "pclk"); 838 if (IS_ERR(hdmi->pclk)) { 839 DRM_DEV_ERROR(hdmi->dev, "Unable to get HDMI pclk clk\n"); 840 return PTR_ERR(hdmi->pclk); 841 } 842 843 ret = clk_prepare_enable(hdmi->pclk); 844 if (ret) { 845 DRM_DEV_ERROR(hdmi->dev, 846 "Cannot enable HDMI pclk clock: %d\n", ret); 847 return ret; 848 } 849 850 irq = platform_get_irq(pdev, 0); 851 if (irq < 0) { 852 ret = irq; 853 goto err_disable_clk; 854 } 855 856 inno_hdmi_reset(hdmi); 857 858 hdmi->ddc = inno_hdmi_i2c_adapter(hdmi); 859 if (IS_ERR(hdmi->ddc)) { 860 ret = PTR_ERR(hdmi->ddc); 861 hdmi->ddc = NULL; 862 goto err_disable_clk; 863 } 864 865 /* 866 * When IP controller haven't configured to an accurate video 867 * timing, then the TMDS clock source would be switched to 868 * PCLK_HDMI, so we need to init the TMDS rate to PCLK rate, 869 * and reconfigure the DDC clock. 870 */ 871 hdmi->tmds_rate = clk_get_rate(hdmi->pclk); 872 inno_hdmi_i2c_init(hdmi); 873 874 ret = inno_hdmi_register(drm, hdmi); 875 if (ret) 876 goto err_put_adapter; 877 878 dev_set_drvdata(dev, hdmi); 879 880 /* Unmute hotplug interrupt */ 881 hdmi_modb(hdmi, HDMI_STATUS, m_MASK_INT_HOTPLUG, v_MASK_INT_HOTPLUG(1)); 882 883 ret = devm_request_threaded_irq(dev, irq, inno_hdmi_hardirq, 884 inno_hdmi_irq, IRQF_SHARED, 885 dev_name(dev), hdmi); 886 if (ret < 0) 887 goto err_cleanup_hdmi; 888 889 return 0; 890 err_cleanup_hdmi: 891 hdmi->connector.funcs->destroy(&hdmi->connector); 892 hdmi->encoder.encoder.funcs->destroy(&hdmi->encoder.encoder); 893 err_put_adapter: 894 i2c_put_adapter(hdmi->ddc); 895 err_disable_clk: 896 clk_disable_unprepare(hdmi->pclk); 897 return ret; 898 } 899 900 static void inno_hdmi_unbind(struct device *dev, struct device *master, 901 void *data) 902 { 903 struct inno_hdmi *hdmi = dev_get_drvdata(dev); 904 905 hdmi->connector.funcs->destroy(&hdmi->connector); 906 hdmi->encoder.encoder.funcs->destroy(&hdmi->encoder.encoder); 907 908 i2c_put_adapter(hdmi->ddc); 909 clk_disable_unprepare(hdmi->pclk); 910 } 911 912 static const struct component_ops inno_hdmi_ops = { 913 .bind = inno_hdmi_bind, 914 .unbind = inno_hdmi_unbind, 915 }; 916 917 static int inno_hdmi_probe(struct platform_device *pdev) 918 { 919 return component_add(&pdev->dev, &inno_hdmi_ops); 920 } 921 922 static void inno_hdmi_remove(struct platform_device *pdev) 923 { 924 component_del(&pdev->dev, &inno_hdmi_ops); 925 } 926 927 static const struct of_device_id inno_hdmi_dt_ids[] = { 928 { .compatible = "rockchip,rk3036-inno-hdmi", 929 }, 930 {}, 931 }; 932 MODULE_DEVICE_TABLE(of, inno_hdmi_dt_ids); 933 934 struct platform_driver inno_hdmi_driver = { 935 .probe = inno_hdmi_probe, 936 .remove_new = inno_hdmi_remove, 937 .driver = { 938 .name = "innohdmi-rockchip", 939 .of_match_table = inno_hdmi_dt_ids, 940 }, 941 }; 942