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#include "rockchip_drm_vop.h" 27 28#include "inno_hdmi.h" 29 30struct hdmi_data_info { 31 int vic; 32 bool sink_has_audio; 33 unsigned int enc_in_format; 34 unsigned int enc_out_format; 35 unsigned int colorimetry; 36}; 37 38struct inno_hdmi_i2c { 39 struct i2c_adapter adap; 40 41 u8 ddc_addr; 42 u8 segment_addr; 43 44 struct mutex lock; 45 struct completion cmp; 46}; 47 48struct inno_hdmi { 49 struct device *dev; 50 struct drm_device *drm_dev; 51 52 int irq; 53 struct clk *pclk; 54 void __iomem *regs; 55 56 struct drm_connector connector; 57 struct rockchip_encoder encoder; 58 59 struct inno_hdmi_i2c *i2c; 60 struct i2c_adapter *ddc; 61 62 unsigned int tmds_rate; 63 64 struct hdmi_data_info hdmi_data; 65 struct drm_display_mode previous_mode; 66}; 67 68static struct inno_hdmi *encoder_to_inno_hdmi(struct drm_encoder *encoder) 69{ 70 struct rockchip_encoder *rkencoder = to_rockchip_encoder(encoder); 71 72 return container_of(rkencoder, struct inno_hdmi, encoder); 73} 74 75static struct inno_hdmi *connector_to_inno_hdmi(struct drm_connector *connector) 76{ 77 return container_of(connector, struct inno_hdmi, connector); 78} 79 80enum { 81 CSC_ITU601_16_235_TO_RGB_0_255_8BIT, 82 CSC_ITU601_0_255_TO_RGB_0_255_8BIT, 83 CSC_ITU709_16_235_TO_RGB_0_255_8BIT, 84 CSC_RGB_0_255_TO_ITU601_16_235_8BIT, 85 CSC_RGB_0_255_TO_ITU709_16_235_8BIT, 86 CSC_RGB_0_255_TO_RGB_16_235_8BIT, 87}; 88 89static const char coeff_csc[][24] = { 90 /* 91 * YUV2RGB:601 SD mode(Y[16:235], UV[16:240], RGB[0:255]): 92 * R = 1.164*Y + 1.596*V - 204 93 * G = 1.164*Y - 0.391*U - 0.813*V + 154 94 * B = 1.164*Y + 2.018*U - 258 95 */ 96 { 97 0x04, 0xa7, 0x00, 0x00, 0x06, 0x62, 0x02, 0xcc, 98 0x04, 0xa7, 0x11, 0x90, 0x13, 0x40, 0x00, 0x9a, 99 0x04, 0xa7, 0x08, 0x12, 0x00, 0x00, 0x03, 0x02 100 }, 101 /* 102 * YUV2RGB:601 SD mode(YUV[0:255],RGB[0:255]): 103 * R = Y + 1.402*V - 248 104 * G = Y - 0.344*U - 0.714*V + 135 105 * B = Y + 1.772*U - 227 106 */ 107 { 108 0x04, 0x00, 0x00, 0x00, 0x05, 0x9b, 0x02, 0xf8, 109 0x04, 0x00, 0x11, 0x60, 0x12, 0xdb, 0x00, 0x87, 110 0x04, 0x00, 0x07, 0x16, 0x00, 0x00, 0x02, 0xe3 111 }, 112 /* 113 * YUV2RGB:709 HD mode(Y[16:235],UV[16:240],RGB[0:255]): 114 * R = 1.164*Y + 1.793*V - 248 115 * G = 1.164*Y - 0.213*U - 0.534*V + 77 116 * B = 1.164*Y + 2.115*U - 289 117 */ 118 { 119 0x04, 0xa7, 0x00, 0x00, 0x07, 0x2c, 0x02, 0xf8, 120 0x04, 0xa7, 0x10, 0xda, 0x12, 0x22, 0x00, 0x4d, 121 0x04, 0xa7, 0x08, 0x74, 0x00, 0x00, 0x03, 0x21 122 }, 123 124 /* 125 * RGB2YUV:601 SD mode: 126 * Cb = -0.291G - 0.148R + 0.439B + 128 127 * Y = 0.504G + 0.257R + 0.098B + 16 128 * Cr = -0.368G + 0.439R - 0.071B + 128 129 */ 130 { 131 0x11, 0x5f, 0x01, 0x82, 0x10, 0x23, 0x00, 0x80, 132 0x02, 0x1c, 0x00, 0xa1, 0x00, 0x36, 0x00, 0x1e, 133 0x11, 0x29, 0x10, 0x59, 0x01, 0x82, 0x00, 0x80 134 }, 135 /* 136 * RGB2YUV:709 HD mode: 137 * Cb = - 0.338G - 0.101R + 0.439B + 128 138 * Y = 0.614G + 0.183R + 0.062B + 16 139 * Cr = - 0.399G + 0.439R - 0.040B + 128 140 */ 141 { 142 0x11, 0x98, 0x01, 0xc1, 0x10, 0x28, 0x00, 0x80, 143 0x02, 0x74, 0x00, 0xbb, 0x00, 0x3f, 0x00, 0x10, 144 0x11, 0x5a, 0x10, 0x67, 0x01, 0xc1, 0x00, 0x80 145 }, 146 /* 147 * RGB[0:255]2RGB[16:235]: 148 * R' = R x (235-16)/255 + 16; 149 * G' = G x (235-16)/255 + 16; 150 * B' = B x (235-16)/255 + 16; 151 */ 152 { 153 0x00, 0x00, 0x03, 0x6F, 0x00, 0x00, 0x00, 0x10, 154 0x03, 0x6F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 155 0x00, 0x00, 0x00, 0x00, 0x03, 0x6F, 0x00, 0x10 156 }, 157}; 158 159static inline u8 hdmi_readb(struct inno_hdmi *hdmi, u16 offset) 160{ 161 return readl_relaxed(hdmi->regs + (offset) * 0x04); 162} 163 164static inline void hdmi_writeb(struct inno_hdmi *hdmi, u16 offset, u32 val) 165{ 166 writel_relaxed(val, hdmi->regs + (offset) * 0x04); 167} 168 169static inline void hdmi_modb(struct inno_hdmi *hdmi, u16 offset, 170 u32 msk, u32 val) 171{ 172 u8 temp = hdmi_readb(hdmi, offset) & ~msk; 173 174 temp |= val & msk; 175 hdmi_writeb(hdmi, offset, temp); 176} 177 178static void inno_hdmi_i2c_init(struct inno_hdmi *hdmi) 179{ 180 int ddc_bus_freq; 181 182 ddc_bus_freq = (hdmi->tmds_rate >> 2) / HDMI_SCL_RATE; 183 184 hdmi_writeb(hdmi, DDC_BUS_FREQ_L, ddc_bus_freq & 0xFF); 185 hdmi_writeb(hdmi, DDC_BUS_FREQ_H, (ddc_bus_freq >> 8) & 0xFF); 186 187 /* Clear the EDID interrupt flag and mute the interrupt */ 188 hdmi_writeb(hdmi, HDMI_INTERRUPT_MASK1, 0); 189 hdmi_writeb(hdmi, HDMI_INTERRUPT_STATUS1, m_INT_EDID_READY); 190} 191 192static void inno_hdmi_sys_power(struct inno_hdmi *hdmi, bool enable) 193{ 194 if (enable) 195 hdmi_modb(hdmi, HDMI_SYS_CTRL, m_POWER, v_PWR_ON); 196 else 197 hdmi_modb(hdmi, HDMI_SYS_CTRL, m_POWER, v_PWR_OFF); 198} 199 200static void inno_hdmi_set_pwr_mode(struct inno_hdmi *hdmi, int mode) 201{ 202 switch (mode) { 203 case NORMAL: 204 inno_hdmi_sys_power(hdmi, false); 205 206 hdmi_writeb(hdmi, HDMI_PHY_PRE_EMPHASIS, 0x6f); 207 hdmi_writeb(hdmi, HDMI_PHY_DRIVER, 0xbb); 208 209 hdmi_writeb(hdmi, HDMI_PHY_SYS_CTL, 0x15); 210 hdmi_writeb(hdmi, HDMI_PHY_SYS_CTL, 0x14); 211 hdmi_writeb(hdmi, HDMI_PHY_SYS_CTL, 0x10); 212 hdmi_writeb(hdmi, HDMI_PHY_CHG_PWR, 0x0f); 213 hdmi_writeb(hdmi, HDMI_PHY_SYNC, 0x00); 214 hdmi_writeb(hdmi, HDMI_PHY_SYNC, 0x01); 215 216 inno_hdmi_sys_power(hdmi, true); 217 break; 218 219 case LOWER_PWR: 220 inno_hdmi_sys_power(hdmi, false); 221 hdmi_writeb(hdmi, HDMI_PHY_DRIVER, 0x00); 222 hdmi_writeb(hdmi, HDMI_PHY_PRE_EMPHASIS, 0x00); 223 hdmi_writeb(hdmi, HDMI_PHY_CHG_PWR, 0x00); 224 hdmi_writeb(hdmi, HDMI_PHY_SYS_CTL, 0x15); 225 226 break; 227 228 default: 229 DRM_DEV_ERROR(hdmi->dev, "Unknown power mode %d\n", mode); 230 } 231} 232 233static void inno_hdmi_reset(struct inno_hdmi *hdmi) 234{ 235 u32 val; 236 u32 msk; 237 238 hdmi_modb(hdmi, HDMI_SYS_CTRL, m_RST_DIGITAL, v_NOT_RST_DIGITAL); 239 udelay(100); 240 241 hdmi_modb(hdmi, HDMI_SYS_CTRL, m_RST_ANALOG, v_NOT_RST_ANALOG); 242 udelay(100); 243 244 msk = m_REG_CLK_INV | m_REG_CLK_SOURCE | m_POWER | m_INT_POL; 245 val = v_REG_CLK_INV | v_REG_CLK_SOURCE_SYS | v_PWR_ON | v_INT_POL_HIGH; 246 hdmi_modb(hdmi, HDMI_SYS_CTRL, msk, val); 247 248 inno_hdmi_set_pwr_mode(hdmi, NORMAL); 249} 250 251static int inno_hdmi_upload_frame(struct inno_hdmi *hdmi, int setup_rc, 252 union hdmi_infoframe *frame, u32 frame_index, 253 u32 mask, u32 disable, u32 enable) 254{ 255 if (mask) 256 hdmi_modb(hdmi, HDMI_PACKET_SEND_AUTO, mask, disable); 257 258 hdmi_writeb(hdmi, HDMI_CONTROL_PACKET_BUF_INDEX, frame_index); 259 260 if (setup_rc >= 0) { 261 u8 packed_frame[HDMI_MAXIMUM_INFO_FRAME_SIZE]; 262 ssize_t rc, i; 263 264 rc = hdmi_infoframe_pack(frame, packed_frame, 265 sizeof(packed_frame)); 266 if (rc < 0) 267 return rc; 268 269 for (i = 0; i < rc; i++) 270 hdmi_writeb(hdmi, HDMI_CONTROL_PACKET_ADDR + i, 271 packed_frame[i]); 272 273 if (mask) 274 hdmi_modb(hdmi, HDMI_PACKET_SEND_AUTO, mask, enable); 275 } 276 277 return setup_rc; 278} 279 280static int inno_hdmi_config_video_vsi(struct inno_hdmi *hdmi, 281 struct drm_display_mode *mode) 282{ 283 union hdmi_infoframe frame; 284 int rc; 285 286 rc = drm_hdmi_vendor_infoframe_from_display_mode(&frame.vendor.hdmi, 287 &hdmi->connector, 288 mode); 289 290 return inno_hdmi_upload_frame(hdmi, rc, &frame, INFOFRAME_VSI, 291 m_PACKET_VSI_EN, v_PACKET_VSI_EN(0), v_PACKET_VSI_EN(1)); 292} 293 294static int inno_hdmi_config_video_avi(struct inno_hdmi *hdmi, 295 struct drm_display_mode *mode) 296{ 297 union hdmi_infoframe frame; 298 int rc; 299 300 rc = drm_hdmi_avi_infoframe_from_display_mode(&frame.avi, 301 &hdmi->connector, 302 mode); 303 304 if (hdmi->hdmi_data.enc_out_format == HDMI_COLORSPACE_YUV444) 305 frame.avi.colorspace = HDMI_COLORSPACE_YUV444; 306 else if (hdmi->hdmi_data.enc_out_format == HDMI_COLORSPACE_YUV422) 307 frame.avi.colorspace = HDMI_COLORSPACE_YUV422; 308 else 309 frame.avi.colorspace = HDMI_COLORSPACE_RGB; 310 311 return inno_hdmi_upload_frame(hdmi, rc, &frame, INFOFRAME_AVI, 0, 0, 0); 312} 313 314static int inno_hdmi_config_video_csc(struct inno_hdmi *hdmi) 315{ 316 struct hdmi_data_info *data = &hdmi->hdmi_data; 317 int c0_c2_change = 0; 318 int csc_enable = 0; 319 int csc_mode = 0; 320 int auto_csc = 0; 321 int value; 322 int i; 323 324 /* Input video mode is SDR RGB24bit, data enable signal from external */ 325 hdmi_writeb(hdmi, HDMI_VIDEO_CONTRL1, v_DE_EXTERNAL | 326 v_VIDEO_INPUT_FORMAT(VIDEO_INPUT_SDR_RGB444)); 327 328 /* Input color hardcode to RGB, and output color hardcode to RGB888 */ 329 value = v_VIDEO_INPUT_BITS(VIDEO_INPUT_8BITS) | 330 v_VIDEO_OUTPUT_COLOR(0) | 331 v_VIDEO_INPUT_CSP(0); 332 hdmi_writeb(hdmi, HDMI_VIDEO_CONTRL2, value); 333 334 if (data->enc_in_format == data->enc_out_format) { 335 if ((data->enc_in_format == HDMI_COLORSPACE_RGB) || 336 (data->enc_in_format >= HDMI_COLORSPACE_YUV444)) { 337 value = v_SOF_DISABLE | v_COLOR_DEPTH_NOT_INDICATED(1); 338 hdmi_writeb(hdmi, HDMI_VIDEO_CONTRL3, value); 339 340 hdmi_modb(hdmi, HDMI_VIDEO_CONTRL, 341 m_VIDEO_AUTO_CSC | m_VIDEO_C0_C2_SWAP, 342 v_VIDEO_AUTO_CSC(AUTO_CSC_DISABLE) | 343 v_VIDEO_C0_C2_SWAP(C0_C2_CHANGE_DISABLE)); 344 return 0; 345 } 346 } 347 348 if (data->colorimetry == HDMI_COLORIMETRY_ITU_601) { 349 if ((data->enc_in_format == HDMI_COLORSPACE_RGB) && 350 (data->enc_out_format == HDMI_COLORSPACE_YUV444)) { 351 csc_mode = CSC_RGB_0_255_TO_ITU601_16_235_8BIT; 352 auto_csc = AUTO_CSC_DISABLE; 353 c0_c2_change = C0_C2_CHANGE_DISABLE; 354 csc_enable = v_CSC_ENABLE; 355 } else if ((data->enc_in_format == HDMI_COLORSPACE_YUV444) && 356 (data->enc_out_format == HDMI_COLORSPACE_RGB)) { 357 csc_mode = CSC_ITU601_16_235_TO_RGB_0_255_8BIT; 358 auto_csc = AUTO_CSC_ENABLE; 359 c0_c2_change = C0_C2_CHANGE_DISABLE; 360 csc_enable = v_CSC_DISABLE; 361 } 362 } else { 363 if ((data->enc_in_format == HDMI_COLORSPACE_RGB) && 364 (data->enc_out_format == HDMI_COLORSPACE_YUV444)) { 365 csc_mode = CSC_RGB_0_255_TO_ITU709_16_235_8BIT; 366 auto_csc = AUTO_CSC_DISABLE; 367 c0_c2_change = C0_C2_CHANGE_DISABLE; 368 csc_enable = v_CSC_ENABLE; 369 } else if ((data->enc_in_format == HDMI_COLORSPACE_YUV444) && 370 (data->enc_out_format == HDMI_COLORSPACE_RGB)) { 371 csc_mode = CSC_ITU709_16_235_TO_RGB_0_255_8BIT; 372 auto_csc = AUTO_CSC_ENABLE; 373 c0_c2_change = C0_C2_CHANGE_DISABLE; 374 csc_enable = v_CSC_DISABLE; 375 } 376 } 377 378 for (i = 0; i < 24; i++) 379 hdmi_writeb(hdmi, HDMI_VIDEO_CSC_COEF + i, 380 coeff_csc[csc_mode][i]); 381 382 value = v_SOF_DISABLE | csc_enable | v_COLOR_DEPTH_NOT_INDICATED(1); 383 hdmi_writeb(hdmi, HDMI_VIDEO_CONTRL3, value); 384 hdmi_modb(hdmi, HDMI_VIDEO_CONTRL, m_VIDEO_AUTO_CSC | 385 m_VIDEO_C0_C2_SWAP, v_VIDEO_AUTO_CSC(auto_csc) | 386 v_VIDEO_C0_C2_SWAP(c0_c2_change)); 387 388 return 0; 389} 390 391static int inno_hdmi_config_video_timing(struct inno_hdmi *hdmi, 392 struct drm_display_mode *mode) 393{ 394 int value; 395 396 /* Set detail external video timing polarity and interlace mode */ 397 value = v_EXTERANL_VIDEO(1); 398 value |= mode->flags & DRM_MODE_FLAG_PHSYNC ? 399 v_HSYNC_POLARITY(1) : v_HSYNC_POLARITY(0); 400 value |= mode->flags & DRM_MODE_FLAG_PVSYNC ? 401 v_VSYNC_POLARITY(1) : v_VSYNC_POLARITY(0); 402 value |= mode->flags & DRM_MODE_FLAG_INTERLACE ? 403 v_INETLACE(1) : v_INETLACE(0); 404 hdmi_writeb(hdmi, HDMI_VIDEO_TIMING_CTL, value); 405 406 /* Set detail external video timing */ 407 value = mode->htotal; 408 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HTOTAL_L, value & 0xFF); 409 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HTOTAL_H, (value >> 8) & 0xFF); 410 411 value = mode->htotal - mode->hdisplay; 412 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HBLANK_L, value & 0xFF); 413 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HBLANK_H, (value >> 8) & 0xFF); 414 415 value = mode->htotal - mode->hsync_start; 416 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HDELAY_L, value & 0xFF); 417 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HDELAY_H, (value >> 8) & 0xFF); 418 419 value = mode->hsync_end - mode->hsync_start; 420 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HDURATION_L, value & 0xFF); 421 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HDURATION_H, (value >> 8) & 0xFF); 422 423 value = mode->vtotal; 424 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VTOTAL_L, value & 0xFF); 425 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VTOTAL_H, (value >> 8) & 0xFF); 426 427 value = mode->vtotal - mode->vdisplay; 428 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VBLANK, value & 0xFF); 429 430 value = mode->vtotal - mode->vsync_start; 431 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VDELAY, value & 0xFF); 432 433 value = mode->vsync_end - mode->vsync_start; 434 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VDURATION, value & 0xFF); 435 436 hdmi_writeb(hdmi, HDMI_PHY_PRE_DIV_RATIO, 0x1e); 437 hdmi_writeb(hdmi, HDMI_PHY_FEEDBACK_DIV_RATIO_LOW, 0x2c); 438 hdmi_writeb(hdmi, HDMI_PHY_FEEDBACK_DIV_RATIO_HIGH, 0x01); 439 440 return 0; 441} 442 443static int inno_hdmi_setup(struct inno_hdmi *hdmi, 444 struct drm_display_mode *mode) 445{ 446 struct drm_display_info *display = &hdmi->connector.display_info; 447 448 hdmi->hdmi_data.vic = drm_match_cea_mode(mode); 449 450 hdmi->hdmi_data.enc_in_format = HDMI_COLORSPACE_RGB; 451 hdmi->hdmi_data.enc_out_format = HDMI_COLORSPACE_RGB; 452 453 if ((hdmi->hdmi_data.vic == 6) || (hdmi->hdmi_data.vic == 7) || 454 (hdmi->hdmi_data.vic == 21) || (hdmi->hdmi_data.vic == 22) || 455 (hdmi->hdmi_data.vic == 2) || (hdmi->hdmi_data.vic == 3) || 456 (hdmi->hdmi_data.vic == 17) || (hdmi->hdmi_data.vic == 18)) 457 hdmi->hdmi_data.colorimetry = HDMI_COLORIMETRY_ITU_601; 458 else 459 hdmi->hdmi_data.colorimetry = HDMI_COLORIMETRY_ITU_709; 460 461 /* Mute video and audio output */ 462 hdmi_modb(hdmi, HDMI_AV_MUTE, m_AUDIO_MUTE | m_VIDEO_BLACK, 463 v_AUDIO_MUTE(1) | v_VIDEO_MUTE(1)); 464 465 /* Set HDMI Mode */ 466 hdmi_writeb(hdmi, HDMI_HDCP_CTRL, 467 v_HDMI_DVI(display->is_hdmi)); 468 469 inno_hdmi_config_video_timing(hdmi, mode); 470 471 inno_hdmi_config_video_csc(hdmi); 472 473 if (display->is_hdmi) { 474 inno_hdmi_config_video_avi(hdmi, mode); 475 inno_hdmi_config_video_vsi(hdmi, mode); 476 } 477 478 /* 479 * When IP controller have configured to an accurate video 480 * timing, then the TMDS clock source would be switched to 481 * DCLK_LCDC, so we need to init the TMDS rate to mode pixel 482 * clock rate, and reconfigure the DDC clock. 483 */ 484 hdmi->tmds_rate = mode->clock * 1000; 485 inno_hdmi_i2c_init(hdmi); 486 487 /* Unmute video and audio output */ 488 hdmi_modb(hdmi, HDMI_AV_MUTE, m_AUDIO_MUTE | m_VIDEO_BLACK, 489 v_AUDIO_MUTE(0) | v_VIDEO_MUTE(0)); 490 491 return 0; 492} 493 494static void inno_hdmi_encoder_mode_set(struct drm_encoder *encoder, 495 struct drm_display_mode *mode, 496 struct drm_display_mode *adj_mode) 497{ 498 struct inno_hdmi *hdmi = encoder_to_inno_hdmi(encoder); 499 500 inno_hdmi_setup(hdmi, adj_mode); 501 502 /* Store the display mode for plugin/DPMS poweron events */ 503 drm_mode_copy(&hdmi->previous_mode, adj_mode); 504} 505 506static void inno_hdmi_encoder_enable(struct drm_encoder *encoder) 507{ 508 struct inno_hdmi *hdmi = encoder_to_inno_hdmi(encoder); 509 510 inno_hdmi_set_pwr_mode(hdmi, NORMAL); 511} 512 513static void inno_hdmi_encoder_disable(struct drm_encoder *encoder) 514{ 515 struct inno_hdmi *hdmi = encoder_to_inno_hdmi(encoder); 516 517 inno_hdmi_set_pwr_mode(hdmi, LOWER_PWR); 518} 519 520static bool inno_hdmi_encoder_mode_fixup(struct drm_encoder *encoder, 521 const struct drm_display_mode *mode, 522 struct drm_display_mode *adj_mode) 523{ 524 return true; 525} 526 527static int 528inno_hdmi_encoder_atomic_check(struct drm_encoder *encoder, 529 struct drm_crtc_state *crtc_state, 530 struct drm_connector_state *conn_state) 531{ 532 struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state); 533 534 s->output_mode = ROCKCHIP_OUT_MODE_P888; 535 s->output_type = DRM_MODE_CONNECTOR_HDMIA; 536 537 return 0; 538} 539 540static struct drm_encoder_helper_funcs inno_hdmi_encoder_helper_funcs = { 541 .enable = inno_hdmi_encoder_enable, 542 .disable = inno_hdmi_encoder_disable, 543 .mode_fixup = inno_hdmi_encoder_mode_fixup, 544 .mode_set = inno_hdmi_encoder_mode_set, 545 .atomic_check = inno_hdmi_encoder_atomic_check, 546}; 547 548static enum drm_connector_status 549inno_hdmi_connector_detect(struct drm_connector *connector, bool force) 550{ 551 struct inno_hdmi *hdmi = connector_to_inno_hdmi(connector); 552 553 return (hdmi_readb(hdmi, HDMI_STATUS) & m_HOTPLUG) ? 554 connector_status_connected : connector_status_disconnected; 555} 556 557static int inno_hdmi_connector_get_modes(struct drm_connector *connector) 558{ 559 struct inno_hdmi *hdmi = connector_to_inno_hdmi(connector); 560 struct edid *edid; 561 int ret = 0; 562 563 if (!hdmi->ddc) 564 return 0; 565 566 edid = drm_get_edid(connector, hdmi->ddc); 567 if (edid) { 568 hdmi->hdmi_data.sink_has_audio = drm_detect_monitor_audio(edid); 569 drm_connector_update_edid_property(connector, edid); 570 ret = drm_add_edid_modes(connector, edid); 571 kfree(edid); 572 } 573 574 return ret; 575} 576 577static enum drm_mode_status 578inno_hdmi_connector_mode_valid(struct drm_connector *connector, 579 struct drm_display_mode *mode) 580{ 581 return MODE_OK; 582} 583 584static int 585inno_hdmi_probe_single_connector_modes(struct drm_connector *connector, 586 uint32_t maxX, uint32_t maxY) 587{ 588 return drm_helper_probe_single_connector_modes(connector, 1920, 1080); 589} 590 591static void inno_hdmi_connector_destroy(struct drm_connector *connector) 592{ 593 drm_connector_unregister(connector); 594 drm_connector_cleanup(connector); 595} 596 597static const struct drm_connector_funcs inno_hdmi_connector_funcs = { 598 .fill_modes = inno_hdmi_probe_single_connector_modes, 599 .detect = inno_hdmi_connector_detect, 600 .destroy = inno_hdmi_connector_destroy, 601 .reset = drm_atomic_helper_connector_reset, 602 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 603 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 604}; 605 606static struct drm_connector_helper_funcs inno_hdmi_connector_helper_funcs = { 607 .get_modes = inno_hdmi_connector_get_modes, 608 .mode_valid = inno_hdmi_connector_mode_valid, 609}; 610 611static int inno_hdmi_register(struct drm_device *drm, struct inno_hdmi *hdmi) 612{ 613 struct drm_encoder *encoder = &hdmi->encoder.encoder; 614 struct device *dev = hdmi->dev; 615 616 encoder->possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node); 617 618 /* 619 * If we failed to find the CRTC(s) which this encoder is 620 * supposed to be connected to, it's because the CRTC has 621 * not been registered yet. Defer probing, and hope that 622 * the required CRTC is added later. 623 */ 624 if (encoder->possible_crtcs == 0) 625 return -EPROBE_DEFER; 626 627 drm_encoder_helper_add(encoder, &inno_hdmi_encoder_helper_funcs); 628 drm_simple_encoder_init(drm, encoder, DRM_MODE_ENCODER_TMDS); 629 630 hdmi->connector.polled = DRM_CONNECTOR_POLL_HPD; 631 632 drm_connector_helper_add(&hdmi->connector, 633 &inno_hdmi_connector_helper_funcs); 634 drm_connector_init_with_ddc(drm, &hdmi->connector, 635 &inno_hdmi_connector_funcs, 636 DRM_MODE_CONNECTOR_HDMIA, 637 hdmi->ddc); 638 639 drm_connector_attach_encoder(&hdmi->connector, encoder); 640 641 return 0; 642} 643 644static irqreturn_t inno_hdmi_i2c_irq(struct inno_hdmi *hdmi) 645{ 646 struct inno_hdmi_i2c *i2c = hdmi->i2c; 647 u8 stat; 648 649 stat = hdmi_readb(hdmi, HDMI_INTERRUPT_STATUS1); 650 if (!(stat & m_INT_EDID_READY)) 651 return IRQ_NONE; 652 653 /* Clear HDMI EDID interrupt flag */ 654 hdmi_writeb(hdmi, HDMI_INTERRUPT_STATUS1, m_INT_EDID_READY); 655 656 complete(&i2c->cmp); 657 658 return IRQ_HANDLED; 659} 660 661static irqreturn_t inno_hdmi_hardirq(int irq, void *dev_id) 662{ 663 struct inno_hdmi *hdmi = dev_id; 664 irqreturn_t ret = IRQ_NONE; 665 u8 interrupt; 666 667 if (hdmi->i2c) 668 ret = inno_hdmi_i2c_irq(hdmi); 669 670 interrupt = hdmi_readb(hdmi, HDMI_STATUS); 671 if (interrupt & m_INT_HOTPLUG) { 672 hdmi_modb(hdmi, HDMI_STATUS, m_INT_HOTPLUG, m_INT_HOTPLUG); 673 ret = IRQ_WAKE_THREAD; 674 } 675 676 return ret; 677} 678 679static irqreturn_t inno_hdmi_irq(int irq, void *dev_id) 680{ 681 struct inno_hdmi *hdmi = dev_id; 682 683 drm_helper_hpd_irq_event(hdmi->connector.dev); 684 685 return IRQ_HANDLED; 686} 687 688static int inno_hdmi_i2c_read(struct inno_hdmi *hdmi, struct i2c_msg *msgs) 689{ 690 int length = msgs->len; 691 u8 *buf = msgs->buf; 692 int ret; 693 694 ret = wait_for_completion_timeout(&hdmi->i2c->cmp, HZ / 10); 695 if (!ret) 696 return -EAGAIN; 697 698 while (length--) 699 *buf++ = hdmi_readb(hdmi, HDMI_EDID_FIFO_ADDR); 700 701 return 0; 702} 703 704static int inno_hdmi_i2c_write(struct inno_hdmi *hdmi, struct i2c_msg *msgs) 705{ 706 /* 707 * The DDC module only support read EDID message, so 708 * we assume that each word write to this i2c adapter 709 * should be the offset of EDID word address. 710 */ 711 if ((msgs->len != 1) || 712 ((msgs->addr != DDC_ADDR) && (msgs->addr != DDC_SEGMENT_ADDR))) 713 return -EINVAL; 714 715 reinit_completion(&hdmi->i2c->cmp); 716 717 if (msgs->addr == DDC_SEGMENT_ADDR) 718 hdmi->i2c->segment_addr = msgs->buf[0]; 719 if (msgs->addr == DDC_ADDR) 720 hdmi->i2c->ddc_addr = msgs->buf[0]; 721 722 /* Set edid fifo first addr */ 723 hdmi_writeb(hdmi, HDMI_EDID_FIFO_OFFSET, 0x00); 724 725 /* Set edid word address 0x00/0x80 */ 726 hdmi_writeb(hdmi, HDMI_EDID_WORD_ADDR, hdmi->i2c->ddc_addr); 727 728 /* Set edid segment pointer */ 729 hdmi_writeb(hdmi, HDMI_EDID_SEGMENT_POINTER, hdmi->i2c->segment_addr); 730 731 return 0; 732} 733 734static int inno_hdmi_i2c_xfer(struct i2c_adapter *adap, 735 struct i2c_msg *msgs, int num) 736{ 737 struct inno_hdmi *hdmi = i2c_get_adapdata(adap); 738 struct inno_hdmi_i2c *i2c = hdmi->i2c; 739 int i, ret = 0; 740 741 mutex_lock(&i2c->lock); 742 743 /* Clear the EDID interrupt flag and unmute the interrupt */ 744 hdmi_writeb(hdmi, HDMI_INTERRUPT_MASK1, m_INT_EDID_READY); 745 hdmi_writeb(hdmi, HDMI_INTERRUPT_STATUS1, m_INT_EDID_READY); 746 747 for (i = 0; i < num; i++) { 748 DRM_DEV_DEBUG(hdmi->dev, 749 "xfer: num: %d/%d, len: %d, flags: %#x\n", 750 i + 1, num, msgs[i].len, msgs[i].flags); 751 752 if (msgs[i].flags & I2C_M_RD) 753 ret = inno_hdmi_i2c_read(hdmi, &msgs[i]); 754 else 755 ret = inno_hdmi_i2c_write(hdmi, &msgs[i]); 756 757 if (ret < 0) 758 break; 759 } 760 761 if (!ret) 762 ret = num; 763 764 /* Mute HDMI EDID interrupt */ 765 hdmi_writeb(hdmi, HDMI_INTERRUPT_MASK1, 0); 766 767 mutex_unlock(&i2c->lock); 768 769 return ret; 770} 771 772static u32 inno_hdmi_i2c_func(struct i2c_adapter *adapter) 773{ 774 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; 775} 776 777static const struct i2c_algorithm inno_hdmi_algorithm = { 778 .master_xfer = inno_hdmi_i2c_xfer, 779 .functionality = inno_hdmi_i2c_func, 780}; 781 782static struct i2c_adapter *inno_hdmi_i2c_adapter(struct inno_hdmi *hdmi) 783{ 784 struct i2c_adapter *adap; 785 struct inno_hdmi_i2c *i2c; 786 int ret; 787 788 i2c = devm_kzalloc(hdmi->dev, sizeof(*i2c), GFP_KERNEL); 789 if (!i2c) 790 return ERR_PTR(-ENOMEM); 791 792 mutex_init(&i2c->lock); 793 init_completion(&i2c->cmp); 794 795 adap = &i2c->adap; 796 adap->class = I2C_CLASS_DDC; 797 adap->owner = THIS_MODULE; 798 adap->dev.parent = hdmi->dev; 799 adap->dev.of_node = hdmi->dev->of_node; 800 adap->algo = &inno_hdmi_algorithm; 801 strscpy(adap->name, "Inno HDMI", sizeof(adap->name)); 802 i2c_set_adapdata(adap, hdmi); 803 804 ret = i2c_add_adapter(adap); 805 if (ret) { 806 dev_warn(hdmi->dev, "cannot add %s I2C adapter\n", adap->name); 807 devm_kfree(hdmi->dev, i2c); 808 return ERR_PTR(ret); 809 } 810 811 hdmi->i2c = i2c; 812 813 DRM_DEV_INFO(hdmi->dev, "registered %s I2C bus driver\n", adap->name); 814 815 return adap; 816} 817 818static int inno_hdmi_bind(struct device *dev, struct device *master, 819 void *data) 820{ 821 struct platform_device *pdev = to_platform_device(dev); 822 struct drm_device *drm = data; 823 struct inno_hdmi *hdmi; 824 int irq; 825 int ret; 826 827 hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL); 828 if (!hdmi) 829 return -ENOMEM; 830 831 hdmi->dev = dev; 832 hdmi->drm_dev = drm; 833 834 hdmi->regs = devm_platform_ioremap_resource(pdev, 0); 835 if (IS_ERR(hdmi->regs)) 836 return PTR_ERR(hdmi->regs); 837 838 hdmi->pclk = devm_clk_get(hdmi->dev, "pclk"); 839 if (IS_ERR(hdmi->pclk)) { 840 DRM_DEV_ERROR(hdmi->dev, "Unable to get HDMI pclk clk\n"); 841 return PTR_ERR(hdmi->pclk); 842 } 843 844 ret = clk_prepare_enable(hdmi->pclk); 845 if (ret) { 846 DRM_DEV_ERROR(hdmi->dev, 847 "Cannot enable HDMI pclk clock: %d\n", ret); 848 return ret; 849 } 850 851 irq = platform_get_irq(pdev, 0); 852 if (irq < 0) { 853 ret = irq; 854 goto err_disable_clk; 855 } 856 857 inno_hdmi_reset(hdmi); 858 859 hdmi->ddc = inno_hdmi_i2c_adapter(hdmi); 860 if (IS_ERR(hdmi->ddc)) { 861 ret = PTR_ERR(hdmi->ddc); 862 hdmi->ddc = NULL; 863 goto err_disable_clk; 864 } 865 866 /* 867 * When IP controller haven't configured to an accurate video 868 * timing, then the TMDS clock source would be switched to 869 * PCLK_HDMI, so we need to init the TMDS rate to PCLK rate, 870 * and reconfigure the DDC clock. 871 */ 872 hdmi->tmds_rate = clk_get_rate(hdmi->pclk); 873 inno_hdmi_i2c_init(hdmi); 874 875 ret = inno_hdmi_register(drm, hdmi); 876 if (ret) 877 goto err_put_adapter; 878 879 dev_set_drvdata(dev, hdmi); 880 881 /* Unmute hotplug interrupt */ 882 hdmi_modb(hdmi, HDMI_STATUS, m_MASK_INT_HOTPLUG, v_MASK_INT_HOTPLUG(1)); 883 884 ret = devm_request_threaded_irq(dev, irq, inno_hdmi_hardirq, 885 inno_hdmi_irq, IRQF_SHARED, 886 dev_name(dev), hdmi); 887 if (ret < 0) 888 goto err_cleanup_hdmi; 889 890 return 0; 891err_cleanup_hdmi: 892 hdmi->connector.funcs->destroy(&hdmi->connector); 893 hdmi->encoder.encoder.funcs->destroy(&hdmi->encoder.encoder); 894err_put_adapter: 895 i2c_put_adapter(hdmi->ddc); 896err_disable_clk: 897 clk_disable_unprepare(hdmi->pclk); 898 return ret; 899} 900 901static void inno_hdmi_unbind(struct device *dev, struct device *master, 902 void *data) 903{ 904 struct inno_hdmi *hdmi = dev_get_drvdata(dev); 905 906 hdmi->connector.funcs->destroy(&hdmi->connector); 907 hdmi->encoder.encoder.funcs->destroy(&hdmi->encoder.encoder); 908 909 i2c_put_adapter(hdmi->ddc); 910 clk_disable_unprepare(hdmi->pclk); 911} 912 913static const struct component_ops inno_hdmi_ops = { 914 .bind = inno_hdmi_bind, 915 .unbind = inno_hdmi_unbind, 916}; 917 918static int inno_hdmi_probe(struct platform_device *pdev) 919{ 920 return component_add(&pdev->dev, &inno_hdmi_ops); 921} 922 923static void inno_hdmi_remove(struct platform_device *pdev) 924{ 925 component_del(&pdev->dev, &inno_hdmi_ops); 926} 927 928static const struct of_device_id inno_hdmi_dt_ids[] = { 929 { .compatible = "rockchip,rk3036-inno-hdmi", 930 }, 931 {}, 932}; 933MODULE_DEVICE_TABLE(of, inno_hdmi_dt_ids); 934 935struct platform_driver inno_hdmi_driver = { 936 .probe = inno_hdmi_probe, 937 .remove_new = inno_hdmi_remove, 938 .driver = { 939 .name = "innohdmi-rockchip", 940 .of_match_table = inno_hdmi_dt_ids, 941 }, 942}; 943