1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (C) 2015 Free Electrons 4 * Copyright (C) 2015 NextThing Co 5 * 6 * Maxime Ripard <maxime.ripard@free-electrons.com> 7 */ 8 9 #include <linux/clk.h> 10 #include <linux/component.h> 11 #include <linux/module.h> 12 #include <linux/of_address.h> 13 #include <linux/platform_device.h> 14 #include <linux/regmap.h> 15 #include <linux/reset.h> 16 17 #include <drm/drm_atomic_helper.h> 18 #include <drm/drm_of.h> 19 #include <drm/drm_panel.h> 20 #include <drm/drm_print.h> 21 #include <drm/drm_probe_helper.h> 22 #include <drm/drm_simple_kms_helper.h> 23 24 #include "sun4i_crtc.h" 25 #include "sun4i_drv.h" 26 #include "sunxi_engine.h" 27 28 #define SUN4I_TVE_EN_REG 0x000 29 #define SUN4I_TVE_EN_DAC_MAP_MASK GENMASK(19, 4) 30 #define SUN4I_TVE_EN_DAC_MAP(dac, out) (((out) & 0xf) << (dac + 1) * 4) 31 #define SUN4I_TVE_EN_ENABLE BIT(0) 32 33 #define SUN4I_TVE_CFG0_REG 0x004 34 #define SUN4I_TVE_CFG0_DAC_CONTROL_54M BIT(26) 35 #define SUN4I_TVE_CFG0_CORE_DATAPATH_54M BIT(25) 36 #define SUN4I_TVE_CFG0_CORE_CONTROL_54M BIT(24) 37 #define SUN4I_TVE_CFG0_YC_EN BIT(17) 38 #define SUN4I_TVE_CFG0_COMP_EN BIT(16) 39 #define SUN4I_TVE_CFG0_RES(x) ((x) & 0xf) 40 #define SUN4I_TVE_CFG0_RES_480i SUN4I_TVE_CFG0_RES(0) 41 #define SUN4I_TVE_CFG0_RES_576i SUN4I_TVE_CFG0_RES(1) 42 43 #define SUN4I_TVE_DAC0_REG 0x008 44 #define SUN4I_TVE_DAC0_CLOCK_INVERT BIT(24) 45 #define SUN4I_TVE_DAC0_LUMA(x) (((x) & 3) << 20) 46 #define SUN4I_TVE_DAC0_LUMA_0_4 SUN4I_TVE_DAC0_LUMA(3) 47 #define SUN4I_TVE_DAC0_CHROMA(x) (((x) & 3) << 18) 48 #define SUN4I_TVE_DAC0_CHROMA_0_75 SUN4I_TVE_DAC0_CHROMA(3) 49 #define SUN4I_TVE_DAC0_INTERNAL_DAC(x) (((x) & 3) << 16) 50 #define SUN4I_TVE_DAC0_INTERNAL_DAC_37_5_OHMS SUN4I_TVE_DAC0_INTERNAL_DAC(3) 51 #define SUN4I_TVE_DAC0_DAC_EN(dac) BIT(dac) 52 53 #define SUN4I_TVE_NOTCH_REG 0x00c 54 #define SUN4I_TVE_NOTCH_DAC0_TO_DAC_DLY(dac, x) ((4 - (x)) << (dac * 3)) 55 56 #define SUN4I_TVE_CHROMA_FREQ_REG 0x010 57 58 #define SUN4I_TVE_PORCH_REG 0x014 59 #define SUN4I_TVE_PORCH_BACK(x) ((x) << 16) 60 #define SUN4I_TVE_PORCH_FRONT(x) (x) 61 62 #define SUN4I_TVE_LINE_REG 0x01c 63 #define SUN4I_TVE_LINE_FIRST(x) ((x) << 16) 64 #define SUN4I_TVE_LINE_NUMBER(x) (x) 65 66 #define SUN4I_TVE_LEVEL_REG 0x020 67 #define SUN4I_TVE_LEVEL_BLANK(x) ((x) << 16) 68 #define SUN4I_TVE_LEVEL_BLACK(x) (x) 69 70 #define SUN4I_TVE_DAC1_REG 0x024 71 #define SUN4I_TVE_DAC1_AMPLITUDE(dac, x) ((x) << (dac * 8)) 72 73 #define SUN4I_TVE_DETECT_STA_REG 0x038 74 #define SUN4I_TVE_DETECT_STA_DAC(dac) BIT((dac * 8)) 75 #define SUN4I_TVE_DETECT_STA_UNCONNECTED 0 76 #define SUN4I_TVE_DETECT_STA_CONNECTED 1 77 #define SUN4I_TVE_DETECT_STA_GROUND 2 78 79 #define SUN4I_TVE_CB_CR_LVL_REG 0x10c 80 #define SUN4I_TVE_CB_CR_LVL_CR_BURST(x) ((x) << 8) 81 #define SUN4I_TVE_CB_CR_LVL_CB_BURST(x) (x) 82 83 #define SUN4I_TVE_TINT_BURST_PHASE_REG 0x110 84 #define SUN4I_TVE_TINT_BURST_PHASE_CHROMA(x) (x) 85 86 #define SUN4I_TVE_BURST_WIDTH_REG 0x114 87 #define SUN4I_TVE_BURST_WIDTH_BREEZEWAY(x) ((x) << 16) 88 #define SUN4I_TVE_BURST_WIDTH_BURST_WIDTH(x) ((x) << 8) 89 #define SUN4I_TVE_BURST_WIDTH_HSYNC_WIDTH(x) (x) 90 91 #define SUN4I_TVE_CB_CR_GAIN_REG 0x118 92 #define SUN4I_TVE_CB_CR_GAIN_CR(x) ((x) << 8) 93 #define SUN4I_TVE_CB_CR_GAIN_CB(x) (x) 94 95 #define SUN4I_TVE_SYNC_VBI_REG 0x11c 96 #define SUN4I_TVE_SYNC_VBI_SYNC(x) ((x) << 16) 97 #define SUN4I_TVE_SYNC_VBI_VBLANK(x) (x) 98 99 #define SUN4I_TVE_ACTIVE_LINE_REG 0x124 100 #define SUN4I_TVE_ACTIVE_LINE(x) (x) 101 102 #define SUN4I_TVE_CHROMA_REG 0x128 103 #define SUN4I_TVE_CHROMA_COMP_GAIN(x) ((x) & 3) 104 #define SUN4I_TVE_CHROMA_COMP_GAIN_50 SUN4I_TVE_CHROMA_COMP_GAIN(2) 105 106 #define SUN4I_TVE_12C_REG 0x12c 107 #define SUN4I_TVE_12C_NOTCH_WIDTH_WIDE BIT(8) 108 #define SUN4I_TVE_12C_COMP_YUV_EN BIT(0) 109 110 #define SUN4I_TVE_RESYNC_REG 0x130 111 #define SUN4I_TVE_RESYNC_FIELD BIT(31) 112 #define SUN4I_TVE_RESYNC_LINE(x) ((x) << 16) 113 #define SUN4I_TVE_RESYNC_PIXEL(x) (x) 114 115 #define SUN4I_TVE_SLAVE_REG 0x134 116 117 #define SUN4I_TVE_WSS_DATA2_REG 0x244 118 119 struct color_gains { 120 u16 cb; 121 u16 cr; 122 }; 123 124 struct burst_levels { 125 u16 cb; 126 u16 cr; 127 }; 128 129 struct video_levels { 130 u16 black; 131 u16 blank; 132 }; 133 134 struct resync_parameters { 135 bool field; 136 u16 line; 137 u16 pixel; 138 }; 139 140 struct tv_mode { 141 char *name; 142 143 u32 mode; 144 u32 chroma_freq; 145 u16 back_porch; 146 u16 front_porch; 147 u16 line_number; 148 u16 vblank_level; 149 150 u32 hdisplay; 151 u16 hfront_porch; 152 u16 hsync_len; 153 u16 hback_porch; 154 155 u32 vdisplay; 156 u16 vfront_porch; 157 u16 vsync_len; 158 u16 vback_porch; 159 160 bool yc_en; 161 bool dac3_en; 162 bool dac_bit25_en; 163 164 const struct color_gains *color_gains; 165 const struct burst_levels *burst_levels; 166 const struct video_levels *video_levels; 167 const struct resync_parameters *resync_params; 168 }; 169 170 struct sun4i_tv { 171 struct drm_connector connector; 172 struct drm_encoder encoder; 173 174 struct clk *clk; 175 struct regmap *regs; 176 struct reset_control *reset; 177 178 struct sun4i_drv *drv; 179 }; 180 181 static const struct video_levels ntsc_video_levels = { 182 .black = 282, .blank = 240, 183 }; 184 185 static const struct video_levels pal_video_levels = { 186 .black = 252, .blank = 252, 187 }; 188 189 static const struct burst_levels ntsc_burst_levels = { 190 .cb = 79, .cr = 0, 191 }; 192 193 static const struct burst_levels pal_burst_levels = { 194 .cb = 40, .cr = 40, 195 }; 196 197 static const struct color_gains ntsc_color_gains = { 198 .cb = 160, .cr = 160, 199 }; 200 201 static const struct color_gains pal_color_gains = { 202 .cb = 224, .cr = 224, 203 }; 204 205 static const struct resync_parameters ntsc_resync_parameters = { 206 .field = false, .line = 14, .pixel = 12, 207 }; 208 209 static const struct resync_parameters pal_resync_parameters = { 210 .field = true, .line = 13, .pixel = 12, 211 }; 212 213 static const struct tv_mode tv_modes[] = { 214 { 215 .name = "NTSC", 216 .mode = SUN4I_TVE_CFG0_RES_480i, 217 .chroma_freq = 0x21f07c1f, 218 .yc_en = true, 219 .dac3_en = true, 220 .dac_bit25_en = true, 221 222 .back_porch = 118, 223 .front_porch = 32, 224 .line_number = 525, 225 226 .hdisplay = 720, 227 .hfront_porch = 18, 228 .hsync_len = 2, 229 .hback_porch = 118, 230 231 .vdisplay = 480, 232 .vfront_porch = 26, 233 .vsync_len = 2, 234 .vback_porch = 17, 235 236 .vblank_level = 240, 237 238 .color_gains = &ntsc_color_gains, 239 .burst_levels = &ntsc_burst_levels, 240 .video_levels = &ntsc_video_levels, 241 .resync_params = &ntsc_resync_parameters, 242 }, 243 { 244 .name = "PAL", 245 .mode = SUN4I_TVE_CFG0_RES_576i, 246 .chroma_freq = 0x2a098acb, 247 248 .back_porch = 138, 249 .front_porch = 24, 250 .line_number = 625, 251 252 .hdisplay = 720, 253 .hfront_porch = 3, 254 .hsync_len = 2, 255 .hback_porch = 139, 256 257 .vdisplay = 576, 258 .vfront_porch = 28, 259 .vsync_len = 2, 260 .vback_porch = 19, 261 262 .vblank_level = 252, 263 264 .color_gains = &pal_color_gains, 265 .burst_levels = &pal_burst_levels, 266 .video_levels = &pal_video_levels, 267 .resync_params = &pal_resync_parameters, 268 }, 269 }; 270 271 static inline struct sun4i_tv * 272 drm_encoder_to_sun4i_tv(struct drm_encoder *encoder) 273 { 274 return container_of(encoder, struct sun4i_tv, 275 encoder); 276 } 277 278 static inline struct sun4i_tv * 279 drm_connector_to_sun4i_tv(struct drm_connector *connector) 280 { 281 return container_of(connector, struct sun4i_tv, 282 connector); 283 } 284 285 /* 286 * FIXME: If only the drm_display_mode private field was usable, this 287 * could go away... 288 * 289 * So far, it doesn't seem to be preserved when the mode is passed by 290 * to mode_set for some reason. 291 */ 292 static const struct tv_mode *sun4i_tv_find_tv_by_mode(const struct drm_display_mode *mode) 293 { 294 int i; 295 296 /* First try to identify the mode by name */ 297 for (i = 0; i < ARRAY_SIZE(tv_modes); i++) { 298 const struct tv_mode *tv_mode = &tv_modes[i]; 299 300 DRM_DEBUG_DRIVER("Comparing mode %s vs %s", 301 mode->name, tv_mode->name); 302 303 if (!strcmp(mode->name, tv_mode->name)) 304 return tv_mode; 305 } 306 307 /* Then by number of lines */ 308 for (i = 0; i < ARRAY_SIZE(tv_modes); i++) { 309 const struct tv_mode *tv_mode = &tv_modes[i]; 310 311 DRM_DEBUG_DRIVER("Comparing mode %s vs %s (X: %d vs %d)", 312 mode->name, tv_mode->name, 313 mode->vdisplay, tv_mode->vdisplay); 314 315 if (mode->vdisplay == tv_mode->vdisplay) 316 return tv_mode; 317 } 318 319 return NULL; 320 } 321 322 static void sun4i_tv_mode_to_drm_mode(const struct tv_mode *tv_mode, 323 struct drm_display_mode *mode) 324 { 325 DRM_DEBUG_DRIVER("Creating mode %s\n", mode->name); 326 327 mode->type = DRM_MODE_TYPE_DRIVER; 328 mode->clock = 13500; 329 mode->flags = DRM_MODE_FLAG_INTERLACE; 330 331 mode->hdisplay = tv_mode->hdisplay; 332 mode->hsync_start = mode->hdisplay + tv_mode->hfront_porch; 333 mode->hsync_end = mode->hsync_start + tv_mode->hsync_len; 334 mode->htotal = mode->hsync_end + tv_mode->hback_porch; 335 336 mode->vdisplay = tv_mode->vdisplay; 337 mode->vsync_start = mode->vdisplay + tv_mode->vfront_porch; 338 mode->vsync_end = mode->vsync_start + tv_mode->vsync_len; 339 mode->vtotal = mode->vsync_end + tv_mode->vback_porch; 340 } 341 342 static void sun4i_tv_disable(struct drm_encoder *encoder) 343 { 344 struct sun4i_tv *tv = drm_encoder_to_sun4i_tv(encoder); 345 struct sun4i_crtc *crtc = drm_crtc_to_sun4i_crtc(encoder->crtc); 346 347 DRM_DEBUG_DRIVER("Disabling the TV Output\n"); 348 349 regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG, 350 SUN4I_TVE_EN_ENABLE, 351 0); 352 353 sunxi_engine_disable_color_correction(crtc->engine); 354 } 355 356 static void sun4i_tv_enable(struct drm_encoder *encoder) 357 { 358 struct sun4i_tv *tv = drm_encoder_to_sun4i_tv(encoder); 359 struct sun4i_crtc *crtc = drm_crtc_to_sun4i_crtc(encoder->crtc); 360 361 DRM_DEBUG_DRIVER("Enabling the TV Output\n"); 362 363 sunxi_engine_apply_color_correction(crtc->engine); 364 365 regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG, 366 SUN4I_TVE_EN_ENABLE, 367 SUN4I_TVE_EN_ENABLE); 368 } 369 370 static void sun4i_tv_mode_set(struct drm_encoder *encoder, 371 struct drm_display_mode *mode, 372 struct drm_display_mode *adjusted_mode) 373 { 374 struct sun4i_tv *tv = drm_encoder_to_sun4i_tv(encoder); 375 const struct tv_mode *tv_mode = sun4i_tv_find_tv_by_mode(mode); 376 377 /* Enable and map the DAC to the output */ 378 regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG, 379 SUN4I_TVE_EN_DAC_MAP_MASK, 380 SUN4I_TVE_EN_DAC_MAP(0, 1) | 381 SUN4I_TVE_EN_DAC_MAP(1, 2) | 382 SUN4I_TVE_EN_DAC_MAP(2, 3) | 383 SUN4I_TVE_EN_DAC_MAP(3, 4)); 384 385 /* Set PAL settings */ 386 regmap_write(tv->regs, SUN4I_TVE_CFG0_REG, 387 tv_mode->mode | 388 (tv_mode->yc_en ? SUN4I_TVE_CFG0_YC_EN : 0) | 389 SUN4I_TVE_CFG0_COMP_EN | 390 SUN4I_TVE_CFG0_DAC_CONTROL_54M | 391 SUN4I_TVE_CFG0_CORE_DATAPATH_54M | 392 SUN4I_TVE_CFG0_CORE_CONTROL_54M); 393 394 /* Configure the DAC for a composite output */ 395 regmap_write(tv->regs, SUN4I_TVE_DAC0_REG, 396 SUN4I_TVE_DAC0_DAC_EN(0) | 397 (tv_mode->dac3_en ? SUN4I_TVE_DAC0_DAC_EN(3) : 0) | 398 SUN4I_TVE_DAC0_INTERNAL_DAC_37_5_OHMS | 399 SUN4I_TVE_DAC0_CHROMA_0_75 | 400 SUN4I_TVE_DAC0_LUMA_0_4 | 401 SUN4I_TVE_DAC0_CLOCK_INVERT | 402 (tv_mode->dac_bit25_en ? BIT(25) : 0) | 403 BIT(30)); 404 405 /* Configure the sample delay between DAC0 and the other DAC */ 406 regmap_write(tv->regs, SUN4I_TVE_NOTCH_REG, 407 SUN4I_TVE_NOTCH_DAC0_TO_DAC_DLY(1, 0) | 408 SUN4I_TVE_NOTCH_DAC0_TO_DAC_DLY(2, 0)); 409 410 regmap_write(tv->regs, SUN4I_TVE_CHROMA_FREQ_REG, 411 tv_mode->chroma_freq); 412 413 /* Set the front and back porch */ 414 regmap_write(tv->regs, SUN4I_TVE_PORCH_REG, 415 SUN4I_TVE_PORCH_BACK(tv_mode->back_porch) | 416 SUN4I_TVE_PORCH_FRONT(tv_mode->front_porch)); 417 418 /* Set the lines setup */ 419 regmap_write(tv->regs, SUN4I_TVE_LINE_REG, 420 SUN4I_TVE_LINE_FIRST(22) | 421 SUN4I_TVE_LINE_NUMBER(tv_mode->line_number)); 422 423 regmap_write(tv->regs, SUN4I_TVE_LEVEL_REG, 424 SUN4I_TVE_LEVEL_BLANK(tv_mode->video_levels->blank) | 425 SUN4I_TVE_LEVEL_BLACK(tv_mode->video_levels->black)); 426 427 regmap_write(tv->regs, SUN4I_TVE_DAC1_REG, 428 SUN4I_TVE_DAC1_AMPLITUDE(0, 0x18) | 429 SUN4I_TVE_DAC1_AMPLITUDE(1, 0x18) | 430 SUN4I_TVE_DAC1_AMPLITUDE(2, 0x18) | 431 SUN4I_TVE_DAC1_AMPLITUDE(3, 0x18)); 432 433 regmap_write(tv->regs, SUN4I_TVE_CB_CR_LVL_REG, 434 SUN4I_TVE_CB_CR_LVL_CB_BURST(tv_mode->burst_levels->cb) | 435 SUN4I_TVE_CB_CR_LVL_CR_BURST(tv_mode->burst_levels->cr)); 436 437 /* Set burst width for a composite output */ 438 regmap_write(tv->regs, SUN4I_TVE_BURST_WIDTH_REG, 439 SUN4I_TVE_BURST_WIDTH_HSYNC_WIDTH(126) | 440 SUN4I_TVE_BURST_WIDTH_BURST_WIDTH(68) | 441 SUN4I_TVE_BURST_WIDTH_BREEZEWAY(22)); 442 443 regmap_write(tv->regs, SUN4I_TVE_CB_CR_GAIN_REG, 444 SUN4I_TVE_CB_CR_GAIN_CB(tv_mode->color_gains->cb) | 445 SUN4I_TVE_CB_CR_GAIN_CR(tv_mode->color_gains->cr)); 446 447 regmap_write(tv->regs, SUN4I_TVE_SYNC_VBI_REG, 448 SUN4I_TVE_SYNC_VBI_SYNC(0x10) | 449 SUN4I_TVE_SYNC_VBI_VBLANK(tv_mode->vblank_level)); 450 451 regmap_write(tv->regs, SUN4I_TVE_ACTIVE_LINE_REG, 452 SUN4I_TVE_ACTIVE_LINE(1440)); 453 454 /* Set composite chroma gain to 50 % */ 455 regmap_write(tv->regs, SUN4I_TVE_CHROMA_REG, 456 SUN4I_TVE_CHROMA_COMP_GAIN_50); 457 458 regmap_write(tv->regs, SUN4I_TVE_12C_REG, 459 SUN4I_TVE_12C_COMP_YUV_EN | 460 SUN4I_TVE_12C_NOTCH_WIDTH_WIDE); 461 462 regmap_write(tv->regs, SUN4I_TVE_RESYNC_REG, 463 SUN4I_TVE_RESYNC_PIXEL(tv_mode->resync_params->pixel) | 464 SUN4I_TVE_RESYNC_LINE(tv_mode->resync_params->line) | 465 (tv_mode->resync_params->field ? 466 SUN4I_TVE_RESYNC_FIELD : 0)); 467 468 regmap_write(tv->regs, SUN4I_TVE_SLAVE_REG, 0); 469 } 470 471 static const struct drm_encoder_helper_funcs sun4i_tv_helper_funcs = { 472 .disable = sun4i_tv_disable, 473 .enable = sun4i_tv_enable, 474 .mode_set = sun4i_tv_mode_set, 475 }; 476 477 static int sun4i_tv_comp_get_modes(struct drm_connector *connector) 478 { 479 int i; 480 481 for (i = 0; i < ARRAY_SIZE(tv_modes); i++) { 482 struct drm_display_mode *mode; 483 const struct tv_mode *tv_mode = &tv_modes[i]; 484 485 mode = drm_mode_create(connector->dev); 486 if (!mode) { 487 DRM_ERROR("Failed to create a new display mode\n"); 488 return 0; 489 } 490 491 strcpy(mode->name, tv_mode->name); 492 493 sun4i_tv_mode_to_drm_mode(tv_mode, mode); 494 drm_mode_probed_add(connector, mode); 495 } 496 497 return i; 498 } 499 500 static int sun4i_tv_comp_mode_valid(struct drm_connector *connector, 501 struct drm_display_mode *mode) 502 { 503 /* TODO */ 504 return MODE_OK; 505 } 506 507 static const struct drm_connector_helper_funcs sun4i_tv_comp_connector_helper_funcs = { 508 .get_modes = sun4i_tv_comp_get_modes, 509 .mode_valid = sun4i_tv_comp_mode_valid, 510 }; 511 512 static void 513 sun4i_tv_comp_connector_destroy(struct drm_connector *connector) 514 { 515 drm_connector_cleanup(connector); 516 } 517 518 static const struct drm_connector_funcs sun4i_tv_comp_connector_funcs = { 519 .fill_modes = drm_helper_probe_single_connector_modes, 520 .destroy = sun4i_tv_comp_connector_destroy, 521 .reset = drm_atomic_helper_connector_reset, 522 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 523 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 524 }; 525 526 static const struct regmap_config sun4i_tv_regmap_config = { 527 .reg_bits = 32, 528 .val_bits = 32, 529 .reg_stride = 4, 530 .max_register = SUN4I_TVE_WSS_DATA2_REG, 531 .name = "tv-encoder", 532 }; 533 534 static int sun4i_tv_bind(struct device *dev, struct device *master, 535 void *data) 536 { 537 struct platform_device *pdev = to_platform_device(dev); 538 struct drm_device *drm = data; 539 struct sun4i_drv *drv = drm->dev_private; 540 struct sun4i_tv *tv; 541 struct resource *res; 542 void __iomem *regs; 543 int ret; 544 545 tv = devm_kzalloc(dev, sizeof(*tv), GFP_KERNEL); 546 if (!tv) 547 return -ENOMEM; 548 tv->drv = drv; 549 dev_set_drvdata(dev, tv); 550 551 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 552 regs = devm_ioremap_resource(dev, res); 553 if (IS_ERR(regs)) { 554 dev_err(dev, "Couldn't map the TV encoder registers\n"); 555 return PTR_ERR(regs); 556 } 557 558 tv->regs = devm_regmap_init_mmio(dev, regs, 559 &sun4i_tv_regmap_config); 560 if (IS_ERR(tv->regs)) { 561 dev_err(dev, "Couldn't create the TV encoder regmap\n"); 562 return PTR_ERR(tv->regs); 563 } 564 565 tv->reset = devm_reset_control_get(dev, NULL); 566 if (IS_ERR(tv->reset)) { 567 dev_err(dev, "Couldn't get our reset line\n"); 568 return PTR_ERR(tv->reset); 569 } 570 571 ret = reset_control_deassert(tv->reset); 572 if (ret) { 573 dev_err(dev, "Couldn't deassert our reset line\n"); 574 return ret; 575 } 576 577 tv->clk = devm_clk_get(dev, NULL); 578 if (IS_ERR(tv->clk)) { 579 dev_err(dev, "Couldn't get the TV encoder clock\n"); 580 ret = PTR_ERR(tv->clk); 581 goto err_assert_reset; 582 } 583 clk_prepare_enable(tv->clk); 584 585 drm_encoder_helper_add(&tv->encoder, 586 &sun4i_tv_helper_funcs); 587 ret = drm_simple_encoder_init(drm, &tv->encoder, 588 DRM_MODE_ENCODER_TVDAC); 589 if (ret) { 590 dev_err(dev, "Couldn't initialise the TV encoder\n"); 591 goto err_disable_clk; 592 } 593 594 tv->encoder.possible_crtcs = drm_of_find_possible_crtcs(drm, 595 dev->of_node); 596 if (!tv->encoder.possible_crtcs) { 597 ret = -EPROBE_DEFER; 598 goto err_disable_clk; 599 } 600 601 drm_connector_helper_add(&tv->connector, 602 &sun4i_tv_comp_connector_helper_funcs); 603 ret = drm_connector_init(drm, &tv->connector, 604 &sun4i_tv_comp_connector_funcs, 605 DRM_MODE_CONNECTOR_Composite); 606 if (ret) { 607 dev_err(dev, 608 "Couldn't initialise the Composite connector\n"); 609 goto err_cleanup_connector; 610 } 611 tv->connector.interlace_allowed = true; 612 613 drm_connector_attach_encoder(&tv->connector, &tv->encoder); 614 615 return 0; 616 617 err_cleanup_connector: 618 drm_encoder_cleanup(&tv->encoder); 619 err_disable_clk: 620 clk_disable_unprepare(tv->clk); 621 err_assert_reset: 622 reset_control_assert(tv->reset); 623 return ret; 624 } 625 626 static void sun4i_tv_unbind(struct device *dev, struct device *master, 627 void *data) 628 { 629 struct sun4i_tv *tv = dev_get_drvdata(dev); 630 631 drm_connector_cleanup(&tv->connector); 632 drm_encoder_cleanup(&tv->encoder); 633 clk_disable_unprepare(tv->clk); 634 } 635 636 static const struct component_ops sun4i_tv_ops = { 637 .bind = sun4i_tv_bind, 638 .unbind = sun4i_tv_unbind, 639 }; 640 641 static int sun4i_tv_probe(struct platform_device *pdev) 642 { 643 return component_add(&pdev->dev, &sun4i_tv_ops); 644 } 645 646 static int sun4i_tv_remove(struct platform_device *pdev) 647 { 648 component_del(&pdev->dev, &sun4i_tv_ops); 649 650 return 0; 651 } 652 653 static const struct of_device_id sun4i_tv_of_table[] = { 654 { .compatible = "allwinner,sun4i-a10-tv-encoder" }, 655 { } 656 }; 657 MODULE_DEVICE_TABLE(of, sun4i_tv_of_table); 658 659 static struct platform_driver sun4i_tv_platform_driver = { 660 .probe = sun4i_tv_probe, 661 .remove = sun4i_tv_remove, 662 .driver = { 663 .name = "sun4i-tve", 664 .of_match_table = sun4i_tv_of_table, 665 }, 666 }; 667 module_platform_driver(sun4i_tv_platform_driver); 668 669 MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>"); 670 MODULE_DESCRIPTION("Allwinner A10 TV Encoder Driver"); 671 MODULE_LICENSE("GPL"); 672