sun4i_tv.c (17926B)
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 119struct color_gains { 120 u16 cb; 121 u16 cr; 122}; 123 124struct burst_levels { 125 u16 cb; 126 u16 cr; 127}; 128 129struct video_levels { 130 u16 black; 131 u16 blank; 132}; 133 134struct resync_parameters { 135 bool field; 136 u16 line; 137 u16 pixel; 138}; 139 140struct 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 170struct 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 181static const struct video_levels ntsc_video_levels = { 182 .black = 282, .blank = 240, 183}; 184 185static const struct video_levels pal_video_levels = { 186 .black = 252, .blank = 252, 187}; 188 189static const struct burst_levels ntsc_burst_levels = { 190 .cb = 79, .cr = 0, 191}; 192 193static const struct burst_levels pal_burst_levels = { 194 .cb = 40, .cr = 40, 195}; 196 197static const struct color_gains ntsc_color_gains = { 198 .cb = 160, .cr = 160, 199}; 200 201static const struct color_gains pal_color_gains = { 202 .cb = 224, .cr = 224, 203}; 204 205static const struct resync_parameters ntsc_resync_parameters = { 206 .field = false, .line = 14, .pixel = 12, 207}; 208 209static const struct resync_parameters pal_resync_parameters = { 210 .field = true, .line = 13, .pixel = 12, 211}; 212 213static 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 271static inline struct sun4i_tv * 272drm_encoder_to_sun4i_tv(struct drm_encoder *encoder) 273{ 274 return container_of(encoder, struct sun4i_tv, 275 encoder); 276} 277 278static inline struct sun4i_tv * 279drm_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 */ 292static 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 322static 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 342static 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 356static 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 370static 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 471static 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 477static 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 500static 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 507static 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 512static void 513sun4i_tv_comp_connector_destroy(struct drm_connector *connector) 514{ 515 drm_connector_cleanup(connector); 516} 517 518static 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 526static 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 534static 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 void __iomem *regs; 542 int ret; 543 544 tv = devm_kzalloc(dev, sizeof(*tv), GFP_KERNEL); 545 if (!tv) 546 return -ENOMEM; 547 tv->drv = drv; 548 dev_set_drvdata(dev, tv); 549 550 regs = devm_platform_ioremap_resource(pdev, 0); 551 if (IS_ERR(regs)) { 552 dev_err(dev, "Couldn't map the TV encoder registers\n"); 553 return PTR_ERR(regs); 554 } 555 556 tv->regs = devm_regmap_init_mmio(dev, regs, 557 &sun4i_tv_regmap_config); 558 if (IS_ERR(tv->regs)) { 559 dev_err(dev, "Couldn't create the TV encoder regmap\n"); 560 return PTR_ERR(tv->regs); 561 } 562 563 tv->reset = devm_reset_control_get(dev, NULL); 564 if (IS_ERR(tv->reset)) { 565 dev_err(dev, "Couldn't get our reset line\n"); 566 return PTR_ERR(tv->reset); 567 } 568 569 ret = reset_control_deassert(tv->reset); 570 if (ret) { 571 dev_err(dev, "Couldn't deassert our reset line\n"); 572 return ret; 573 } 574 575 tv->clk = devm_clk_get(dev, NULL); 576 if (IS_ERR(tv->clk)) { 577 dev_err(dev, "Couldn't get the TV encoder clock\n"); 578 ret = PTR_ERR(tv->clk); 579 goto err_assert_reset; 580 } 581 clk_prepare_enable(tv->clk); 582 583 drm_encoder_helper_add(&tv->encoder, 584 &sun4i_tv_helper_funcs); 585 ret = drm_simple_encoder_init(drm, &tv->encoder, 586 DRM_MODE_ENCODER_TVDAC); 587 if (ret) { 588 dev_err(dev, "Couldn't initialise the TV encoder\n"); 589 goto err_disable_clk; 590 } 591 592 tv->encoder.possible_crtcs = drm_of_find_possible_crtcs(drm, 593 dev->of_node); 594 if (!tv->encoder.possible_crtcs) { 595 ret = -EPROBE_DEFER; 596 goto err_disable_clk; 597 } 598 599 drm_connector_helper_add(&tv->connector, 600 &sun4i_tv_comp_connector_helper_funcs); 601 ret = drm_connector_init(drm, &tv->connector, 602 &sun4i_tv_comp_connector_funcs, 603 DRM_MODE_CONNECTOR_Composite); 604 if (ret) { 605 dev_err(dev, 606 "Couldn't initialise the Composite connector\n"); 607 goto err_cleanup_connector; 608 } 609 tv->connector.interlace_allowed = true; 610 611 drm_connector_attach_encoder(&tv->connector, &tv->encoder); 612 613 return 0; 614 615err_cleanup_connector: 616 drm_encoder_cleanup(&tv->encoder); 617err_disable_clk: 618 clk_disable_unprepare(tv->clk); 619err_assert_reset: 620 reset_control_assert(tv->reset); 621 return ret; 622} 623 624static void sun4i_tv_unbind(struct device *dev, struct device *master, 625 void *data) 626{ 627 struct sun4i_tv *tv = dev_get_drvdata(dev); 628 629 drm_connector_cleanup(&tv->connector); 630 drm_encoder_cleanup(&tv->encoder); 631 clk_disable_unprepare(tv->clk); 632} 633 634static const struct component_ops sun4i_tv_ops = { 635 .bind = sun4i_tv_bind, 636 .unbind = sun4i_tv_unbind, 637}; 638 639static int sun4i_tv_probe(struct platform_device *pdev) 640{ 641 return component_add(&pdev->dev, &sun4i_tv_ops); 642} 643 644static int sun4i_tv_remove(struct platform_device *pdev) 645{ 646 component_del(&pdev->dev, &sun4i_tv_ops); 647 648 return 0; 649} 650 651static const struct of_device_id sun4i_tv_of_table[] = { 652 { .compatible = "allwinner,sun4i-a10-tv-encoder" }, 653 { } 654}; 655MODULE_DEVICE_TABLE(of, sun4i_tv_of_table); 656 657static struct platform_driver sun4i_tv_platform_driver = { 658 .probe = sun4i_tv_probe, 659 .remove = sun4i_tv_remove, 660 .driver = { 661 .name = "sun4i-tve", 662 .of_match_table = sun4i_tv_of_table, 663 }, 664}; 665module_platform_driver(sun4i_tv_platform_driver); 666 667MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>"); 668MODULE_DESCRIPTION("Allwinner A10 TV Encoder Driver"); 669MODULE_LICENSE("GPL");