1 /* 2 * Copyright (C) STMicroelectronics SA 2014 3 * Author: Fabien Dessenne <fabien.dessenne@st.com> for STMicroelectronics. 4 * License terms: GNU General Public License (GPL), version 2 5 */ 6 7 #include <linux/clk.h> 8 #include <linux/component.h> 9 #include <linux/module.h> 10 #include <linux/platform_device.h> 11 12 #include <drm/drmP.h> 13 #include <drm/drm_crtc_helper.h> 14 15 /* HDformatter registers */ 16 #define HDA_ANA_CFG 0x0000 17 #define HDA_ANA_SCALE_CTRL_Y 0x0004 18 #define HDA_ANA_SCALE_CTRL_CB 0x0008 19 #define HDA_ANA_SCALE_CTRL_CR 0x000C 20 #define HDA_ANA_ANC_CTRL 0x0010 21 #define HDA_ANA_SRC_Y_CFG 0x0014 22 #define HDA_COEFF_Y_PH1_TAP123 0x0018 23 #define HDA_COEFF_Y_PH1_TAP456 0x001C 24 #define HDA_COEFF_Y_PH2_TAP123 0x0020 25 #define HDA_COEFF_Y_PH2_TAP456 0x0024 26 #define HDA_COEFF_Y_PH3_TAP123 0x0028 27 #define HDA_COEFF_Y_PH3_TAP456 0x002C 28 #define HDA_COEFF_Y_PH4_TAP123 0x0030 29 #define HDA_COEFF_Y_PH4_TAP456 0x0034 30 #define HDA_ANA_SRC_C_CFG 0x0040 31 #define HDA_COEFF_C_PH1_TAP123 0x0044 32 #define HDA_COEFF_C_PH1_TAP456 0x0048 33 #define HDA_COEFF_C_PH2_TAP123 0x004C 34 #define HDA_COEFF_C_PH2_TAP456 0x0050 35 #define HDA_COEFF_C_PH3_TAP123 0x0054 36 #define HDA_COEFF_C_PH3_TAP456 0x0058 37 #define HDA_COEFF_C_PH4_TAP123 0x005C 38 #define HDA_COEFF_C_PH4_TAP456 0x0060 39 #define HDA_SYNC_AWGI 0x0300 40 41 /* HDA_ANA_CFG */ 42 #define CFG_AWG_ASYNC_EN BIT(0) 43 #define CFG_AWG_ASYNC_HSYNC_MTD BIT(1) 44 #define CFG_AWG_ASYNC_VSYNC_MTD BIT(2) 45 #define CFG_AWG_SYNC_DEL BIT(3) 46 #define CFG_AWG_FLTR_MODE_SHIFT 4 47 #define CFG_AWG_FLTR_MODE_MASK (0xF << CFG_AWG_FLTR_MODE_SHIFT) 48 #define CFG_AWG_FLTR_MODE_SD (0 << CFG_AWG_FLTR_MODE_SHIFT) 49 #define CFG_AWG_FLTR_MODE_ED (1 << CFG_AWG_FLTR_MODE_SHIFT) 50 #define CFG_AWG_FLTR_MODE_HD (2 << CFG_AWG_FLTR_MODE_SHIFT) 51 #define CFG_SYNC_ON_PBPR_MASK BIT(8) 52 #define CFG_PREFILTER_EN_MASK BIT(9) 53 #define CFG_PBPR_SYNC_OFF_SHIFT 16 54 #define CFG_PBPR_SYNC_OFF_MASK (0x7FF << CFG_PBPR_SYNC_OFF_SHIFT) 55 #define CFG_PBPR_SYNC_OFF_VAL 0x117 /* Voltage dependent. stiH416 */ 56 57 /* Default scaling values */ 58 #define SCALE_CTRL_Y_DFLT 0x00C50256 59 #define SCALE_CTRL_CB_DFLT 0x00DB0249 60 #define SCALE_CTRL_CR_DFLT 0x00DB0249 61 62 /* Video DACs control */ 63 #define VIDEO_DACS_CONTROL_MASK 0x0FFF 64 #define VIDEO_DACS_CONTROL_SYSCFG2535 0x085C /* for stih416 */ 65 #define DAC_CFG_HD_OFF_SHIFT 5 66 #define DAC_CFG_HD_OFF_MASK (0x7 << DAC_CFG_HD_OFF_SHIFT) 67 #define VIDEO_DACS_CONTROL_SYSCFG5072 0x0120 /* for stih407 */ 68 #define DAC_CFG_HD_HZUVW_OFF_MASK BIT(1) 69 70 71 /* Upsampler values for the alternative 2X Filter */ 72 #define SAMPLER_COEF_NB 8 73 #define HDA_ANA_SRC_Y_CFG_ALT_2X 0x01130000 74 static u32 coef_y_alt_2x[] = { 75 0x00FE83FB, 0x1F900401, 0x00000000, 0x00000000, 76 0x00F408F9, 0x055F7C25, 0x00000000, 0x00000000 77 }; 78 79 #define HDA_ANA_SRC_C_CFG_ALT_2X 0x01750004 80 static u32 coef_c_alt_2x[] = { 81 0x001305F7, 0x05274BD0, 0x00000000, 0x00000000, 82 0x0004907C, 0x09C80B9D, 0x00000000, 0x00000000 83 }; 84 85 /* Upsampler values for the 4X Filter */ 86 #define HDA_ANA_SRC_Y_CFG_4X 0x01ED0005 87 #define HDA_ANA_SRC_C_CFG_4X 0x01ED0004 88 static u32 coef_yc_4x[] = { 89 0x00FC827F, 0x008FE20B, 0x00F684FC, 0x050F7C24, 90 0x00F4857C, 0x0A1F402E, 0x00FA027F, 0x0E076E1D 91 }; 92 93 /* AWG instructions for some video modes */ 94 #define AWG_MAX_INST 64 95 96 /* 720p@50 */ 97 static u32 AWGi_720p_50[] = { 98 0x00000971, 0x00000C26, 0x0000013B, 0x00000CDA, 99 0x00000104, 0x00000E7E, 0x00000E7F, 0x0000013B, 100 0x00000D8E, 0x00000104, 0x00001804, 0x00000971, 101 0x00000C26, 0x0000003B, 0x00000FB4, 0x00000FB5, 102 0x00000104, 0x00001AE8 103 }; 104 105 #define NN_720p_50 ARRAY_SIZE(AWGi_720p_50) 106 107 /* 720p@60 */ 108 static u32 AWGi_720p_60[] = { 109 0x00000971, 0x00000C26, 0x0000013B, 0x00000CDA, 110 0x00000104, 0x00000E7E, 0x00000E7F, 0x0000013B, 111 0x00000C44, 0x00000104, 0x00001804, 0x00000971, 112 0x00000C26, 0x0000003B, 0x00000F0F, 0x00000F10, 113 0x00000104, 0x00001AE8 114 }; 115 116 #define NN_720p_60 ARRAY_SIZE(AWGi_720p_60) 117 118 /* 1080p@30 */ 119 static u32 AWGi_1080p_30[] = { 120 0x00000971, 0x00000C2A, 0x0000013B, 0x00000C56, 121 0x00000104, 0x00000FDC, 0x00000FDD, 0x0000013B, 122 0x00000C2A, 0x00000104, 0x00001804, 0x00000971, 123 0x00000C2A, 0x0000003B, 0x00000EBE, 0x00000EBF, 124 0x00000EBF, 0x00000104, 0x00001A2F, 0x00001C4B, 125 0x00001C52 126 }; 127 128 #define NN_1080p_30 ARRAY_SIZE(AWGi_1080p_30) 129 130 /* 1080p@25 */ 131 static u32 AWGi_1080p_25[] = { 132 0x00000971, 0x00000C2A, 0x0000013B, 0x00000C56, 133 0x00000104, 0x00000FDC, 0x00000FDD, 0x0000013B, 134 0x00000DE2, 0x00000104, 0x00001804, 0x00000971, 135 0x00000C2A, 0x0000003B, 0x00000F51, 0x00000F51, 136 0x00000F52, 0x00000104, 0x00001A2F, 0x00001C4B, 137 0x00001C52 138 }; 139 140 #define NN_1080p_25 ARRAY_SIZE(AWGi_1080p_25) 141 142 /* 1080p@24 */ 143 static u32 AWGi_1080p_24[] = { 144 0x00000971, 0x00000C2A, 0x0000013B, 0x00000C56, 145 0x00000104, 0x00000FDC, 0x00000FDD, 0x0000013B, 146 0x00000E50, 0x00000104, 0x00001804, 0x00000971, 147 0x00000C2A, 0x0000003B, 0x00000F76, 0x00000F76, 148 0x00000F76, 0x00000104, 0x00001A2F, 0x00001C4B, 149 0x00001C52 150 }; 151 152 #define NN_1080p_24 ARRAY_SIZE(AWGi_1080p_24) 153 154 /* 720x480p@60 */ 155 static u32 AWGi_720x480p_60[] = { 156 0x00000904, 0x00000F18, 0x0000013B, 0x00001805, 157 0x00000904, 0x00000C3D, 0x0000003B, 0x00001A06 158 }; 159 160 #define NN_720x480p_60 ARRAY_SIZE(AWGi_720x480p_60) 161 162 /* Video mode category */ 163 enum sti_hda_vid_cat { 164 VID_SD, 165 VID_ED, 166 VID_HD_74M, 167 VID_HD_148M 168 }; 169 170 struct sti_hda_video_config { 171 struct drm_display_mode mode; 172 u32 *awg_instr; 173 int nb_instr; 174 enum sti_hda_vid_cat vid_cat; 175 }; 176 177 /* HD analog supported modes 178 * Interlaced modes may be added when supported by the whole display chain 179 */ 180 static const struct sti_hda_video_config hda_supported_modes[] = { 181 /* 1080p30 74.250Mhz */ 182 {{DRM_MODE("1920x1080", DRM_MODE_TYPE_DRIVER, 74250, 1920, 2008, 183 2052, 2200, 0, 1080, 1084, 1089, 1125, 0, 184 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC)}, 185 AWGi_1080p_30, NN_1080p_30, VID_HD_74M}, 186 /* 1080p30 74.176Mhz */ 187 {{DRM_MODE("1920x1080", DRM_MODE_TYPE_DRIVER, 74176, 1920, 2008, 188 2052, 2200, 0, 1080, 1084, 1089, 1125, 0, 189 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC)}, 190 AWGi_1080p_30, NN_1080p_30, VID_HD_74M}, 191 /* 1080p24 74.250Mhz */ 192 {{DRM_MODE("1920x1080", DRM_MODE_TYPE_DRIVER, 74250, 1920, 2558, 193 2602, 2750, 0, 1080, 1084, 1089, 1125, 0, 194 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC)}, 195 AWGi_1080p_24, NN_1080p_24, VID_HD_74M}, 196 /* 1080p24 74.176Mhz */ 197 {{DRM_MODE("1920x1080", DRM_MODE_TYPE_DRIVER, 74176, 1920, 2558, 198 2602, 2750, 0, 1080, 1084, 1089, 1125, 0, 199 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC)}, 200 AWGi_1080p_24, NN_1080p_24, VID_HD_74M}, 201 /* 1080p25 74.250Mhz */ 202 {{DRM_MODE("1920x1080", DRM_MODE_TYPE_DRIVER, 74250, 1920, 2448, 203 2492, 2640, 0, 1080, 1084, 1089, 1125, 0, 204 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC)}, 205 AWGi_1080p_25, NN_1080p_25, VID_HD_74M}, 206 /* 720p60 74.250Mhz */ 207 {{DRM_MODE("1280x720", DRM_MODE_TYPE_DRIVER, 74250, 1280, 1390, 208 1430, 1650, 0, 720, 725, 730, 750, 0, 209 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC)}, 210 AWGi_720p_60, NN_720p_60, VID_HD_74M}, 211 /* 720p60 74.176Mhz */ 212 {{DRM_MODE("1280x720", DRM_MODE_TYPE_DRIVER, 74176, 1280, 1390, 213 1430, 1650, 0, 720, 725, 730, 750, 0, 214 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC)}, 215 AWGi_720p_60, NN_720p_60, VID_HD_74M}, 216 /* 720p50 74.250Mhz */ 217 {{DRM_MODE("1280x720", DRM_MODE_TYPE_DRIVER, 74250, 1280, 1720, 218 1760, 1980, 0, 720, 725, 730, 750, 0, 219 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC)}, 220 AWGi_720p_50, NN_720p_50, VID_HD_74M}, 221 /* 720x480p60 27.027Mhz */ 222 {{DRM_MODE("720x480", DRM_MODE_TYPE_DRIVER, 27027, 720, 736, 223 798, 858, 0, 480, 489, 495, 525, 0, 224 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC)}, 225 AWGi_720x480p_60, NN_720x480p_60, VID_ED}, 226 /* 720x480p60 27.000Mhz */ 227 {{DRM_MODE("720x480", DRM_MODE_TYPE_DRIVER, 27000, 720, 736, 228 798, 858, 0, 480, 489, 495, 525, 0, 229 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC)}, 230 AWGi_720x480p_60, NN_720x480p_60, VID_ED} 231 }; 232 233 /** 234 * STI hd analog structure 235 * 236 * @dev: driver device 237 * @drm_dev: pointer to drm device 238 * @mode: current display mode selected 239 * @regs: HD analog register 240 * @video_dacs_ctrl: video DACS control register 241 * @enabled: true if HD analog is enabled else false 242 */ 243 struct sti_hda { 244 struct device dev; 245 struct drm_device *drm_dev; 246 struct drm_display_mode mode; 247 void __iomem *regs; 248 void __iomem *video_dacs_ctrl; 249 struct clk *clk_pix; 250 struct clk *clk_hddac; 251 bool enabled; 252 }; 253 254 struct sti_hda_connector { 255 struct drm_connector drm_connector; 256 struct drm_encoder *encoder; 257 struct sti_hda *hda; 258 }; 259 260 #define to_sti_hda_connector(x) \ 261 container_of(x, struct sti_hda_connector, drm_connector) 262 263 static u32 hda_read(struct sti_hda *hda, int offset) 264 { 265 return readl(hda->regs + offset); 266 } 267 268 static void hda_write(struct sti_hda *hda, u32 val, int offset) 269 { 270 writel(val, hda->regs + offset); 271 } 272 273 /** 274 * Search for a video mode in the supported modes table 275 * 276 * @mode: mode being searched 277 * @idx: index of the found mode 278 * 279 * Return true if mode is found 280 */ 281 static bool hda_get_mode_idx(struct drm_display_mode mode, int *idx) 282 { 283 unsigned int i; 284 285 for (i = 0; i < ARRAY_SIZE(hda_supported_modes); i++) 286 if (drm_mode_equal(&hda_supported_modes[i].mode, &mode)) { 287 *idx = i; 288 return true; 289 } 290 return false; 291 } 292 293 /** 294 * Enable the HD DACS 295 * 296 * @hda: pointer to HD analog structure 297 * @enable: true if HD DACS need to be enabled, else false 298 */ 299 static void hda_enable_hd_dacs(struct sti_hda *hda, bool enable) 300 { 301 u32 mask; 302 303 if (hda->video_dacs_ctrl) { 304 u32 val; 305 306 switch ((u32)hda->video_dacs_ctrl & VIDEO_DACS_CONTROL_MASK) { 307 case VIDEO_DACS_CONTROL_SYSCFG2535: 308 mask = DAC_CFG_HD_OFF_MASK; 309 break; 310 case VIDEO_DACS_CONTROL_SYSCFG5072: 311 mask = DAC_CFG_HD_HZUVW_OFF_MASK; 312 break; 313 default: 314 DRM_INFO("Video DACS control register not supported!"); 315 return; 316 } 317 318 val = readl(hda->video_dacs_ctrl); 319 if (enable) 320 val &= ~mask; 321 else 322 val |= mask; 323 324 writel(val, hda->video_dacs_ctrl); 325 } 326 } 327 328 /** 329 * Configure AWG, writing instructions 330 * 331 * @hda: pointer to HD analog structure 332 * @awg_instr: pointer to AWG instructions table 333 * @nb: nb of AWG instructions 334 */ 335 static void sti_hda_configure_awg(struct sti_hda *hda, u32 *awg_instr, int nb) 336 { 337 unsigned int i; 338 339 DRM_DEBUG_DRIVER("\n"); 340 341 for (i = 0; i < nb; i++) 342 hda_write(hda, awg_instr[i], HDA_SYNC_AWGI + i * 4); 343 for (i = nb; i < AWG_MAX_INST; i++) 344 hda_write(hda, 0, HDA_SYNC_AWGI + i * 4); 345 } 346 347 static void sti_hda_disable(struct drm_bridge *bridge) 348 { 349 struct sti_hda *hda = bridge->driver_private; 350 u32 val; 351 352 if (!hda->enabled) 353 return; 354 355 DRM_DEBUG_DRIVER("\n"); 356 357 /* Disable HD DAC and AWG */ 358 val = hda_read(hda, HDA_ANA_CFG); 359 val &= ~CFG_AWG_ASYNC_EN; 360 hda_write(hda, val, HDA_ANA_CFG); 361 hda_write(hda, 0, HDA_ANA_ANC_CTRL); 362 363 hda_enable_hd_dacs(hda, false); 364 365 /* Disable/unprepare hda clock */ 366 clk_disable_unprepare(hda->clk_hddac); 367 clk_disable_unprepare(hda->clk_pix); 368 369 hda->enabled = false; 370 } 371 372 static void sti_hda_pre_enable(struct drm_bridge *bridge) 373 { 374 struct sti_hda *hda = bridge->driver_private; 375 u32 val, i, mode_idx; 376 u32 src_filter_y, src_filter_c; 377 u32 *coef_y, *coef_c; 378 u32 filter_mode; 379 380 DRM_DEBUG_DRIVER("\n"); 381 382 if (hda->enabled) 383 return; 384 385 /* Prepare/enable clocks */ 386 if (clk_prepare_enable(hda->clk_pix)) 387 DRM_ERROR("Failed to prepare/enable hda_pix clk\n"); 388 if (clk_prepare_enable(hda->clk_hddac)) 389 DRM_ERROR("Failed to prepare/enable hda_hddac clk\n"); 390 391 if (!hda_get_mode_idx(hda->mode, &mode_idx)) { 392 DRM_ERROR("Undefined mode\n"); 393 return; 394 } 395 396 switch (hda_supported_modes[mode_idx].vid_cat) { 397 case VID_HD_148M: 398 DRM_ERROR("Beyond HD analog capabilities\n"); 399 return; 400 case VID_HD_74M: 401 /* HD use alternate 2x filter */ 402 filter_mode = CFG_AWG_FLTR_MODE_HD; 403 src_filter_y = HDA_ANA_SRC_Y_CFG_ALT_2X; 404 src_filter_c = HDA_ANA_SRC_C_CFG_ALT_2X; 405 coef_y = coef_y_alt_2x; 406 coef_c = coef_c_alt_2x; 407 break; 408 case VID_ED: 409 /* ED uses 4x filter */ 410 filter_mode = CFG_AWG_FLTR_MODE_ED; 411 src_filter_y = HDA_ANA_SRC_Y_CFG_4X; 412 src_filter_c = HDA_ANA_SRC_C_CFG_4X; 413 coef_y = coef_yc_4x; 414 coef_c = coef_yc_4x; 415 break; 416 case VID_SD: 417 DRM_ERROR("Not supported\n"); 418 return; 419 default: 420 DRM_ERROR("Undefined resolution\n"); 421 return; 422 } 423 DRM_DEBUG_DRIVER("Using HDA mode #%d\n", mode_idx); 424 425 /* Enable HD Video DACs */ 426 hda_enable_hd_dacs(hda, true); 427 428 /* Configure scaler */ 429 hda_write(hda, SCALE_CTRL_Y_DFLT, HDA_ANA_SCALE_CTRL_Y); 430 hda_write(hda, SCALE_CTRL_CB_DFLT, HDA_ANA_SCALE_CTRL_CB); 431 hda_write(hda, SCALE_CTRL_CR_DFLT, HDA_ANA_SCALE_CTRL_CR); 432 433 /* Configure sampler */ 434 hda_write(hda , src_filter_y, HDA_ANA_SRC_Y_CFG); 435 hda_write(hda, src_filter_c, HDA_ANA_SRC_C_CFG); 436 for (i = 0; i < SAMPLER_COEF_NB; i++) { 437 hda_write(hda, coef_y[i], HDA_COEFF_Y_PH1_TAP123 + i * 4); 438 hda_write(hda, coef_c[i], HDA_COEFF_C_PH1_TAP123 + i * 4); 439 } 440 441 /* Configure main HDFormatter */ 442 val = 0; 443 val |= (hda->mode.flags & DRM_MODE_FLAG_INTERLACE) ? 444 0 : CFG_AWG_ASYNC_VSYNC_MTD; 445 val |= (CFG_PBPR_SYNC_OFF_VAL << CFG_PBPR_SYNC_OFF_SHIFT); 446 val |= filter_mode; 447 hda_write(hda, val, HDA_ANA_CFG); 448 449 /* Configure AWG */ 450 sti_hda_configure_awg(hda, hda_supported_modes[mode_idx].awg_instr, 451 hda_supported_modes[mode_idx].nb_instr); 452 453 /* Enable AWG */ 454 val = hda_read(hda, HDA_ANA_CFG); 455 val |= CFG_AWG_ASYNC_EN; 456 hda_write(hda, val, HDA_ANA_CFG); 457 458 hda->enabled = true; 459 } 460 461 static void sti_hda_set_mode(struct drm_bridge *bridge, 462 struct drm_display_mode *mode, 463 struct drm_display_mode *adjusted_mode) 464 { 465 struct sti_hda *hda = bridge->driver_private; 466 u32 mode_idx; 467 int hddac_rate; 468 int ret; 469 470 DRM_DEBUG_DRIVER("\n"); 471 472 memcpy(&hda->mode, mode, sizeof(struct drm_display_mode)); 473 474 if (!hda_get_mode_idx(hda->mode, &mode_idx)) { 475 DRM_ERROR("Undefined mode\n"); 476 return; 477 } 478 479 switch (hda_supported_modes[mode_idx].vid_cat) { 480 case VID_HD_74M: 481 /* HD use alternate 2x filter */ 482 hddac_rate = mode->clock * 1000 * 2; 483 break; 484 case VID_ED: 485 /* ED uses 4x filter */ 486 hddac_rate = mode->clock * 1000 * 4; 487 break; 488 default: 489 DRM_ERROR("Undefined mode\n"); 490 return; 491 } 492 493 /* HD DAC = 148.5Mhz or 108 Mhz */ 494 ret = clk_set_rate(hda->clk_hddac, hddac_rate); 495 if (ret < 0) 496 DRM_ERROR("Cannot set rate (%dHz) for hda_hddac clk\n", 497 hddac_rate); 498 499 /* HDformatter clock = compositor clock */ 500 ret = clk_set_rate(hda->clk_pix, mode->clock * 1000); 501 if (ret < 0) 502 DRM_ERROR("Cannot set rate (%dHz) for hda_pix clk\n", 503 mode->clock * 1000); 504 } 505 506 static void sti_hda_bridge_nope(struct drm_bridge *bridge) 507 { 508 /* do nothing */ 509 } 510 511 static void sti_hda_brigde_destroy(struct drm_bridge *bridge) 512 { 513 drm_bridge_cleanup(bridge); 514 kfree(bridge); 515 } 516 517 static const struct drm_bridge_funcs sti_hda_bridge_funcs = { 518 .pre_enable = sti_hda_pre_enable, 519 .enable = sti_hda_bridge_nope, 520 .disable = sti_hda_disable, 521 .post_disable = sti_hda_bridge_nope, 522 .mode_set = sti_hda_set_mode, 523 .destroy = sti_hda_brigde_destroy, 524 }; 525 526 static int sti_hda_connector_get_modes(struct drm_connector *connector) 527 { 528 unsigned int i; 529 int count = 0; 530 struct sti_hda_connector *hda_connector 531 = to_sti_hda_connector(connector); 532 struct sti_hda *hda = hda_connector->hda; 533 534 DRM_DEBUG_DRIVER("\n"); 535 536 for (i = 0; i < ARRAY_SIZE(hda_supported_modes); i++) { 537 struct drm_display_mode *mode = 538 drm_mode_duplicate(hda->drm_dev, 539 &hda_supported_modes[i].mode); 540 if (!mode) 541 continue; 542 mode->vrefresh = drm_mode_vrefresh(mode); 543 544 /* the first mode is the preferred mode */ 545 if (i == 0) 546 mode->type |= DRM_MODE_TYPE_PREFERRED; 547 548 drm_mode_probed_add(connector, mode); 549 count++; 550 } 551 552 drm_mode_sort(&connector->modes); 553 554 return count; 555 } 556 557 #define CLK_TOLERANCE_HZ 50 558 559 static int sti_hda_connector_mode_valid(struct drm_connector *connector, 560 struct drm_display_mode *mode) 561 { 562 int target = mode->clock * 1000; 563 int target_min = target - CLK_TOLERANCE_HZ; 564 int target_max = target + CLK_TOLERANCE_HZ; 565 int result; 566 int idx; 567 struct sti_hda_connector *hda_connector 568 = to_sti_hda_connector(connector); 569 struct sti_hda *hda = hda_connector->hda; 570 571 if (!hda_get_mode_idx(*mode, &idx)) { 572 return MODE_BAD; 573 } else { 574 result = clk_round_rate(hda->clk_pix, target); 575 576 DRM_DEBUG_DRIVER("target rate = %d => available rate = %d\n", 577 target, result); 578 579 if ((result < target_min) || (result > target_max)) { 580 DRM_DEBUG_DRIVER("hda pixclk=%d not supported\n", 581 target); 582 return MODE_BAD; 583 } 584 } 585 586 return MODE_OK; 587 } 588 589 struct drm_encoder *sti_hda_best_encoder(struct drm_connector *connector) 590 { 591 struct sti_hda_connector *hda_connector 592 = to_sti_hda_connector(connector); 593 594 /* Best encoder is the one associated during connector creation */ 595 return hda_connector->encoder; 596 } 597 598 static struct drm_connector_helper_funcs sti_hda_connector_helper_funcs = { 599 .get_modes = sti_hda_connector_get_modes, 600 .mode_valid = sti_hda_connector_mode_valid, 601 .best_encoder = sti_hda_best_encoder, 602 }; 603 604 static enum drm_connector_status 605 sti_hda_connector_detect(struct drm_connector *connector, bool force) 606 { 607 return connector_status_connected; 608 } 609 610 static void sti_hda_connector_destroy(struct drm_connector *connector) 611 { 612 struct sti_hda_connector *hda_connector 613 = to_sti_hda_connector(connector); 614 615 drm_connector_unregister(connector); 616 drm_connector_cleanup(connector); 617 kfree(hda_connector); 618 } 619 620 static struct drm_connector_funcs sti_hda_connector_funcs = { 621 .dpms = drm_helper_connector_dpms, 622 .fill_modes = drm_helper_probe_single_connector_modes, 623 .detect = sti_hda_connector_detect, 624 .destroy = sti_hda_connector_destroy, 625 }; 626 627 static struct drm_encoder *sti_hda_find_encoder(struct drm_device *dev) 628 { 629 struct drm_encoder *encoder; 630 631 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 632 if (encoder->encoder_type == DRM_MODE_ENCODER_DAC) 633 return encoder; 634 } 635 636 return NULL; 637 } 638 639 static int sti_hda_bind(struct device *dev, struct device *master, void *data) 640 { 641 struct sti_hda *hda = dev_get_drvdata(dev); 642 struct drm_device *drm_dev = data; 643 struct drm_encoder *encoder; 644 struct sti_hda_connector *connector; 645 struct drm_connector *drm_connector; 646 struct drm_bridge *bridge; 647 int err; 648 649 /* Set the drm device handle */ 650 hda->drm_dev = drm_dev; 651 652 encoder = sti_hda_find_encoder(drm_dev); 653 if (!encoder) 654 return -ENOMEM; 655 656 connector = devm_kzalloc(dev, sizeof(*connector), GFP_KERNEL); 657 if (!connector) 658 return -ENOMEM; 659 660 connector->hda = hda; 661 662 bridge = devm_kzalloc(dev, sizeof(*bridge), GFP_KERNEL); 663 if (!bridge) 664 return -ENOMEM; 665 666 bridge->driver_private = hda; 667 drm_bridge_init(drm_dev, bridge, &sti_hda_bridge_funcs); 668 669 encoder->bridge = bridge; 670 connector->encoder = encoder; 671 672 drm_connector = (struct drm_connector *)connector; 673 674 drm_connector->polled = DRM_CONNECTOR_POLL_HPD; 675 676 drm_connector_init(drm_dev, drm_connector, 677 &sti_hda_connector_funcs, DRM_MODE_CONNECTOR_Component); 678 drm_connector_helper_add(drm_connector, 679 &sti_hda_connector_helper_funcs); 680 681 err = drm_connector_register(drm_connector); 682 if (err) 683 goto err_connector; 684 685 err = drm_mode_connector_attach_encoder(drm_connector, encoder); 686 if (err) { 687 DRM_ERROR("Failed to attach a connector to a encoder\n"); 688 goto err_sysfs; 689 } 690 691 return 0; 692 693 err_sysfs: 694 drm_connector_unregister(drm_connector); 695 err_connector: 696 drm_bridge_cleanup(bridge); 697 drm_connector_cleanup(drm_connector); 698 return -EINVAL; 699 } 700 701 static void sti_hda_unbind(struct device *dev, 702 struct device *master, void *data) 703 { 704 /* do nothing */ 705 } 706 707 static const struct component_ops sti_hda_ops = { 708 .bind = sti_hda_bind, 709 .unbind = sti_hda_unbind, 710 }; 711 712 static int sti_hda_probe(struct platform_device *pdev) 713 { 714 struct device *dev = &pdev->dev; 715 struct sti_hda *hda; 716 struct resource *res; 717 718 DRM_INFO("%s\n", __func__); 719 720 hda = devm_kzalloc(dev, sizeof(*hda), GFP_KERNEL); 721 if (!hda) 722 return -ENOMEM; 723 724 hda->dev = pdev->dev; 725 726 /* Get resources */ 727 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hda-reg"); 728 if (!res) { 729 DRM_ERROR("Invalid hda resource\n"); 730 return -ENOMEM; 731 } 732 hda->regs = devm_ioremap_nocache(dev, res->start, resource_size(res)); 733 if (IS_ERR(hda->regs)) 734 return PTR_ERR(hda->regs); 735 736 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, 737 "video-dacs-ctrl"); 738 if (res) { 739 hda->video_dacs_ctrl = devm_ioremap_nocache(dev, res->start, 740 resource_size(res)); 741 if (IS_ERR(hda->video_dacs_ctrl)) 742 return PTR_ERR(hda->video_dacs_ctrl); 743 } else { 744 /* If no existing video-dacs-ctrl resource continue the probe */ 745 DRM_DEBUG_DRIVER("No video-dacs-ctrl resource\n"); 746 hda->video_dacs_ctrl = NULL; 747 } 748 749 /* Get clock resources */ 750 hda->clk_pix = devm_clk_get(dev, "pix"); 751 if (IS_ERR(hda->clk_pix)) { 752 DRM_ERROR("Cannot get hda_pix clock\n"); 753 return PTR_ERR(hda->clk_pix); 754 } 755 756 hda->clk_hddac = devm_clk_get(dev, "hddac"); 757 if (IS_ERR(hda->clk_hddac)) { 758 DRM_ERROR("Cannot get hda_hddac clock\n"); 759 return PTR_ERR(hda->clk_hddac); 760 } 761 762 platform_set_drvdata(pdev, hda); 763 764 return component_add(&pdev->dev, &sti_hda_ops); 765 } 766 767 static int sti_hda_remove(struct platform_device *pdev) 768 { 769 component_del(&pdev->dev, &sti_hda_ops); 770 return 0; 771 } 772 773 static struct of_device_id hda_of_match[] = { 774 { .compatible = "st,stih416-hda", }, 775 { .compatible = "st,stih407-hda", }, 776 { /* end node */ } 777 }; 778 MODULE_DEVICE_TABLE(of, hda_of_match); 779 780 struct platform_driver sti_hda_driver = { 781 .driver = { 782 .name = "sti-hda", 783 .owner = THIS_MODULE, 784 .of_match_table = hda_of_match, 785 }, 786 .probe = sti_hda_probe, 787 .remove = sti_hda_remove, 788 }; 789 790 module_platform_driver(sti_hda_driver); 791 792 MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>"); 793 MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver"); 794 MODULE_LICENSE("GPL"); 795