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