1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * (C) COPYRIGHT 2016 ARM Limited. All rights reserved. 4 * Author: Liviu Dudau <Liviu.Dudau@arm.com> 5 * 6 * ARM Mali DP500/DP550/DP650 KMS/DRM driver 7 */ 8 9 #include <linux/module.h> 10 #include <linux/clk.h> 11 #include <linux/component.h> 12 #include <linux/of_device.h> 13 #include <linux/of_graph.h> 14 #include <linux/of_reserved_mem.h> 15 #include <linux/pm_runtime.h> 16 #include <linux/debugfs.h> 17 18 #include <drm/drm_atomic.h> 19 #include <drm/drm_atomic_helper.h> 20 #include <drm/drm_crtc.h> 21 #include <drm/drm_drv.h> 22 #include <drm/drm_fbdev_generic.h> 23 #include <drm/drm_fourcc.h> 24 #include <drm/drm_gem_dma_helper.h> 25 #include <drm/drm_gem_framebuffer_helper.h> 26 #include <drm/drm_managed.h> 27 #include <drm/drm_modeset_helper.h> 28 #include <drm/drm_module.h> 29 #include <drm/drm_of.h> 30 #include <drm/drm_probe_helper.h> 31 #include <drm/drm_vblank.h> 32 33 #include "malidp_drv.h" 34 #include "malidp_mw.h" 35 #include "malidp_regs.h" 36 #include "malidp_hw.h" 37 38 #define MALIDP_CONF_VALID_TIMEOUT 250 39 #define AFBC_HEADER_SIZE 16 40 #define AFBC_SUPERBLK_ALIGNMENT 128 41 42 static void malidp_write_gamma_table(struct malidp_hw_device *hwdev, 43 u32 data[MALIDP_COEFFTAB_NUM_COEFFS]) 44 { 45 int i; 46 /* Update all channels with a single gamma curve. */ 47 const u32 gamma_write_mask = GENMASK(18, 16); 48 /* 49 * Always write an entire table, so the address field in 50 * DE_COEFFTAB_ADDR is 0 and we can use the gamma_write_mask bitmask 51 * directly. 52 */ 53 malidp_hw_write(hwdev, gamma_write_mask, 54 hwdev->hw->map.coeffs_base + MALIDP_COEF_TABLE_ADDR); 55 for (i = 0; i < MALIDP_COEFFTAB_NUM_COEFFS; ++i) 56 malidp_hw_write(hwdev, data[i], 57 hwdev->hw->map.coeffs_base + 58 MALIDP_COEF_TABLE_DATA); 59 } 60 61 static void malidp_atomic_commit_update_gamma(struct drm_crtc *crtc, 62 struct drm_crtc_state *old_state) 63 { 64 struct malidp_drm *malidp = crtc_to_malidp_device(crtc); 65 struct malidp_hw_device *hwdev = malidp->dev; 66 67 if (!crtc->state->color_mgmt_changed) 68 return; 69 70 if (!crtc->state->gamma_lut) { 71 malidp_hw_clearbits(hwdev, 72 MALIDP_DISP_FUNC_GAMMA, 73 MALIDP_DE_DISPLAY_FUNC); 74 } else { 75 struct malidp_crtc_state *mc = 76 to_malidp_crtc_state(crtc->state); 77 78 if (!old_state->gamma_lut || (crtc->state->gamma_lut->base.id != 79 old_state->gamma_lut->base.id)) 80 malidp_write_gamma_table(hwdev, mc->gamma_coeffs); 81 82 malidp_hw_setbits(hwdev, MALIDP_DISP_FUNC_GAMMA, 83 MALIDP_DE_DISPLAY_FUNC); 84 } 85 } 86 87 static 88 void malidp_atomic_commit_update_coloradj(struct drm_crtc *crtc, 89 struct drm_crtc_state *old_state) 90 { 91 struct malidp_drm *malidp = crtc_to_malidp_device(crtc); 92 struct malidp_hw_device *hwdev = malidp->dev; 93 int i; 94 95 if (!crtc->state->color_mgmt_changed) 96 return; 97 98 if (!crtc->state->ctm) { 99 malidp_hw_clearbits(hwdev, MALIDP_DISP_FUNC_CADJ, 100 MALIDP_DE_DISPLAY_FUNC); 101 } else { 102 struct malidp_crtc_state *mc = 103 to_malidp_crtc_state(crtc->state); 104 105 if (!old_state->ctm || (crtc->state->ctm->base.id != 106 old_state->ctm->base.id)) 107 for (i = 0; i < MALIDP_COLORADJ_NUM_COEFFS; ++i) 108 malidp_hw_write(hwdev, 109 mc->coloradj_coeffs[i], 110 hwdev->hw->map.coeffs_base + 111 MALIDP_COLOR_ADJ_COEF + 4 * i); 112 113 malidp_hw_setbits(hwdev, MALIDP_DISP_FUNC_CADJ, 114 MALIDP_DE_DISPLAY_FUNC); 115 } 116 } 117 118 static void malidp_atomic_commit_se_config(struct drm_crtc *crtc, 119 struct drm_crtc_state *old_state) 120 { 121 struct malidp_crtc_state *cs = to_malidp_crtc_state(crtc->state); 122 struct malidp_crtc_state *old_cs = to_malidp_crtc_state(old_state); 123 struct malidp_drm *malidp = crtc_to_malidp_device(crtc); 124 struct malidp_hw_device *hwdev = malidp->dev; 125 struct malidp_se_config *s = &cs->scaler_config; 126 struct malidp_se_config *old_s = &old_cs->scaler_config; 127 u32 se_control = hwdev->hw->map.se_base + 128 ((hwdev->hw->map.features & MALIDP_REGMAP_HAS_CLEARIRQ) ? 129 0x10 : 0xC); 130 u32 layer_control = se_control + MALIDP_SE_LAYER_CONTROL; 131 u32 scr = se_control + MALIDP_SE_SCALING_CONTROL; 132 u32 val; 133 134 /* Set SE_CONTROL */ 135 if (!s->scale_enable) { 136 val = malidp_hw_read(hwdev, se_control); 137 val &= ~MALIDP_SE_SCALING_EN; 138 malidp_hw_write(hwdev, val, se_control); 139 return; 140 } 141 142 hwdev->hw->se_set_scaling_coeffs(hwdev, s, old_s); 143 val = malidp_hw_read(hwdev, se_control); 144 val |= MALIDP_SE_SCALING_EN | MALIDP_SE_ALPHA_EN; 145 146 val &= ~MALIDP_SE_ENH(MALIDP_SE_ENH_MASK); 147 val |= s->enhancer_enable ? MALIDP_SE_ENH(3) : 0; 148 149 val |= MALIDP_SE_RGBO_IF_EN; 150 malidp_hw_write(hwdev, val, se_control); 151 152 /* Set IN_SIZE & OUT_SIZE. */ 153 val = MALIDP_SE_SET_V_SIZE(s->input_h) | 154 MALIDP_SE_SET_H_SIZE(s->input_w); 155 malidp_hw_write(hwdev, val, layer_control + MALIDP_SE_L0_IN_SIZE); 156 val = MALIDP_SE_SET_V_SIZE(s->output_h) | 157 MALIDP_SE_SET_H_SIZE(s->output_w); 158 malidp_hw_write(hwdev, val, layer_control + MALIDP_SE_L0_OUT_SIZE); 159 160 /* Set phase regs. */ 161 malidp_hw_write(hwdev, s->h_init_phase, scr + MALIDP_SE_H_INIT_PH); 162 malidp_hw_write(hwdev, s->h_delta_phase, scr + MALIDP_SE_H_DELTA_PH); 163 malidp_hw_write(hwdev, s->v_init_phase, scr + MALIDP_SE_V_INIT_PH); 164 malidp_hw_write(hwdev, s->v_delta_phase, scr + MALIDP_SE_V_DELTA_PH); 165 } 166 167 /* 168 * set the "config valid" bit and wait until the hardware acts on it 169 */ 170 static int malidp_set_and_wait_config_valid(struct drm_device *drm) 171 { 172 struct malidp_drm *malidp = drm_to_malidp(drm); 173 struct malidp_hw_device *hwdev = malidp->dev; 174 int ret; 175 176 hwdev->hw->set_config_valid(hwdev, 1); 177 /* don't wait for config_valid flag if we are in config mode */ 178 if (hwdev->hw->in_config_mode(hwdev)) { 179 atomic_set(&malidp->config_valid, MALIDP_CONFIG_VALID_DONE); 180 return 0; 181 } 182 183 ret = wait_event_interruptible_timeout(malidp->wq, 184 atomic_read(&malidp->config_valid) == MALIDP_CONFIG_VALID_DONE, 185 msecs_to_jiffies(MALIDP_CONF_VALID_TIMEOUT)); 186 187 return (ret > 0) ? 0 : -ETIMEDOUT; 188 } 189 190 static void malidp_atomic_commit_hw_done(struct drm_atomic_state *state) 191 { 192 struct drm_device *drm = state->dev; 193 struct malidp_drm *malidp = drm_to_malidp(drm); 194 int loop = 5; 195 196 malidp->event = malidp->crtc.state->event; 197 malidp->crtc.state->event = NULL; 198 199 if (malidp->crtc.state->active) { 200 /* 201 * if we have an event to deliver to userspace, make sure 202 * the vblank is enabled as we are sending it from the IRQ 203 * handler. 204 */ 205 if (malidp->event) 206 drm_crtc_vblank_get(&malidp->crtc); 207 208 /* only set config_valid if the CRTC is enabled */ 209 if (malidp_set_and_wait_config_valid(drm) < 0) { 210 /* 211 * make a loop around the second CVAL setting and 212 * try 5 times before giving up. 213 */ 214 while (loop--) { 215 if (!malidp_set_and_wait_config_valid(drm)) 216 break; 217 } 218 DRM_DEBUG_DRIVER("timed out waiting for updated configuration\n"); 219 } 220 221 } else if (malidp->event) { 222 /* CRTC inactive means vblank IRQ is disabled, send event directly */ 223 spin_lock_irq(&drm->event_lock); 224 drm_crtc_send_vblank_event(&malidp->crtc, malidp->event); 225 malidp->event = NULL; 226 spin_unlock_irq(&drm->event_lock); 227 } 228 drm_atomic_helper_commit_hw_done(state); 229 } 230 231 static void malidp_atomic_commit_tail(struct drm_atomic_state *state) 232 { 233 struct drm_device *drm = state->dev; 234 struct malidp_drm *malidp = drm_to_malidp(drm); 235 struct drm_crtc *crtc; 236 struct drm_crtc_state *old_crtc_state; 237 int i; 238 bool fence_cookie = dma_fence_begin_signalling(); 239 240 pm_runtime_get_sync(drm->dev); 241 242 /* 243 * set config_valid to a special value to let IRQ handlers 244 * know that we are updating registers 245 */ 246 atomic_set(&malidp->config_valid, MALIDP_CONFIG_START); 247 malidp->dev->hw->set_config_valid(malidp->dev, 0); 248 249 drm_atomic_helper_commit_modeset_disables(drm, state); 250 251 for_each_old_crtc_in_state(state, crtc, old_crtc_state, i) { 252 malidp_atomic_commit_update_gamma(crtc, old_crtc_state); 253 malidp_atomic_commit_update_coloradj(crtc, old_crtc_state); 254 malidp_atomic_commit_se_config(crtc, old_crtc_state); 255 } 256 257 drm_atomic_helper_commit_planes(drm, state, DRM_PLANE_COMMIT_ACTIVE_ONLY); 258 259 malidp_mw_atomic_commit(drm, state); 260 261 drm_atomic_helper_commit_modeset_enables(drm, state); 262 263 malidp_atomic_commit_hw_done(state); 264 265 dma_fence_end_signalling(fence_cookie); 266 267 pm_runtime_put(drm->dev); 268 269 drm_atomic_helper_cleanup_planes(drm, state); 270 } 271 272 static const struct drm_mode_config_helper_funcs malidp_mode_config_helpers = { 273 .atomic_commit_tail = malidp_atomic_commit_tail, 274 }; 275 276 static bool 277 malidp_verify_afbc_framebuffer_caps(struct drm_device *dev, 278 const struct drm_mode_fb_cmd2 *mode_cmd) 279 { 280 if (malidp_format_mod_supported(dev, mode_cmd->pixel_format, 281 mode_cmd->modifier[0]) == false) 282 return false; 283 284 if (mode_cmd->offsets[0] != 0) { 285 DRM_DEBUG_KMS("AFBC buffers' plane offset should be 0\n"); 286 return false; 287 } 288 289 switch (mode_cmd->modifier[0] & AFBC_SIZE_MASK) { 290 case AFBC_SIZE_16X16: 291 if ((mode_cmd->width % 16) || (mode_cmd->height % 16)) { 292 DRM_DEBUG_KMS("AFBC buffers must be aligned to 16 pixels\n"); 293 return false; 294 } 295 break; 296 default: 297 DRM_DEBUG_KMS("Unsupported AFBC block size\n"); 298 return false; 299 } 300 301 return true; 302 } 303 304 static bool 305 malidp_verify_afbc_framebuffer_size(struct drm_device *dev, 306 struct drm_file *file, 307 const struct drm_mode_fb_cmd2 *mode_cmd) 308 { 309 int n_superblocks = 0; 310 const struct drm_format_info *info; 311 struct drm_gem_object *objs = NULL; 312 u32 afbc_superblock_size = 0, afbc_superblock_height = 0; 313 u32 afbc_superblock_width = 0, afbc_size = 0; 314 int bpp = 0; 315 316 switch (mode_cmd->modifier[0] & AFBC_SIZE_MASK) { 317 case AFBC_SIZE_16X16: 318 afbc_superblock_height = 16; 319 afbc_superblock_width = 16; 320 break; 321 default: 322 DRM_DEBUG_KMS("AFBC superblock size is not supported\n"); 323 return false; 324 } 325 326 info = drm_get_format_info(dev, mode_cmd); 327 328 n_superblocks = (mode_cmd->width / afbc_superblock_width) * 329 (mode_cmd->height / afbc_superblock_height); 330 331 bpp = malidp_format_get_bpp(info->format); 332 333 afbc_superblock_size = (bpp * afbc_superblock_width * afbc_superblock_height) 334 / BITS_PER_BYTE; 335 336 afbc_size = ALIGN(n_superblocks * AFBC_HEADER_SIZE, AFBC_SUPERBLK_ALIGNMENT); 337 afbc_size += n_superblocks * ALIGN(afbc_superblock_size, AFBC_SUPERBLK_ALIGNMENT); 338 339 if ((mode_cmd->width * bpp) != (mode_cmd->pitches[0] * BITS_PER_BYTE)) { 340 DRM_DEBUG_KMS("Invalid value of (pitch * BITS_PER_BYTE) (=%u) " 341 "should be same as width (=%u) * bpp (=%u)\n", 342 (mode_cmd->pitches[0] * BITS_PER_BYTE), 343 mode_cmd->width, bpp); 344 return false; 345 } 346 347 objs = drm_gem_object_lookup(file, mode_cmd->handles[0]); 348 if (!objs) { 349 DRM_DEBUG_KMS("Failed to lookup GEM object\n"); 350 return false; 351 } 352 353 if (objs->size < afbc_size) { 354 DRM_DEBUG_KMS("buffer size (%zu) too small for AFBC buffer size = %u\n", 355 objs->size, afbc_size); 356 drm_gem_object_put(objs); 357 return false; 358 } 359 360 drm_gem_object_put(objs); 361 362 return true; 363 } 364 365 static bool 366 malidp_verify_afbc_framebuffer(struct drm_device *dev, struct drm_file *file, 367 const struct drm_mode_fb_cmd2 *mode_cmd) 368 { 369 if (malidp_verify_afbc_framebuffer_caps(dev, mode_cmd)) 370 return malidp_verify_afbc_framebuffer_size(dev, file, mode_cmd); 371 372 return false; 373 } 374 375 static struct drm_framebuffer * 376 malidp_fb_create(struct drm_device *dev, struct drm_file *file, 377 const struct drm_mode_fb_cmd2 *mode_cmd) 378 { 379 if (mode_cmd->modifier[0]) { 380 if (!malidp_verify_afbc_framebuffer(dev, file, mode_cmd)) 381 return ERR_PTR(-EINVAL); 382 } 383 384 return drm_gem_fb_create(dev, file, mode_cmd); 385 } 386 387 static const struct drm_mode_config_funcs malidp_mode_config_funcs = { 388 .fb_create = malidp_fb_create, 389 .atomic_check = drm_atomic_helper_check, 390 .atomic_commit = drm_atomic_helper_commit, 391 }; 392 393 static int malidp_init(struct drm_device *drm) 394 { 395 int ret; 396 struct malidp_drm *malidp = drm_to_malidp(drm); 397 struct malidp_hw_device *hwdev = malidp->dev; 398 399 ret = drmm_mode_config_init(drm); 400 if (ret) 401 goto out; 402 403 drm->mode_config.min_width = hwdev->min_line_size; 404 drm->mode_config.min_height = hwdev->min_line_size; 405 drm->mode_config.max_width = hwdev->max_line_size; 406 drm->mode_config.max_height = hwdev->max_line_size; 407 drm->mode_config.funcs = &malidp_mode_config_funcs; 408 drm->mode_config.helper_private = &malidp_mode_config_helpers; 409 410 ret = malidp_crtc_init(drm); 411 if (ret) 412 goto out; 413 414 ret = malidp_mw_connector_init(drm); 415 if (ret) 416 goto out; 417 418 out: 419 return ret; 420 } 421 422 static int malidp_irq_init(struct platform_device *pdev) 423 { 424 int irq_de, irq_se, ret = 0; 425 struct drm_device *drm = dev_get_drvdata(&pdev->dev); 426 struct malidp_drm *malidp = drm_to_malidp(drm); 427 struct malidp_hw_device *hwdev = malidp->dev; 428 429 /* fetch the interrupts from DT */ 430 irq_de = platform_get_irq_byname(pdev, "DE"); 431 if (irq_de < 0) { 432 DRM_ERROR("no 'DE' IRQ specified!\n"); 433 return irq_de; 434 } 435 irq_se = platform_get_irq_byname(pdev, "SE"); 436 if (irq_se < 0) { 437 DRM_ERROR("no 'SE' IRQ specified!\n"); 438 return irq_se; 439 } 440 441 ret = malidp_de_irq_init(drm, irq_de); 442 if (ret) 443 return ret; 444 445 ret = malidp_se_irq_init(drm, irq_se); 446 if (ret) { 447 malidp_de_irq_fini(hwdev); 448 return ret; 449 } 450 451 return 0; 452 } 453 454 DEFINE_DRM_GEM_DMA_FOPS(fops); 455 456 static int malidp_dumb_create(struct drm_file *file_priv, 457 struct drm_device *drm, 458 struct drm_mode_create_dumb *args) 459 { 460 struct malidp_drm *malidp = drm_to_malidp(drm); 461 /* allocate for the worst case scenario, i.e. rotated buffers */ 462 u8 alignment = malidp_hw_get_pitch_align(malidp->dev, 1); 463 464 args->pitch = ALIGN(DIV_ROUND_UP(args->width * args->bpp, 8), alignment); 465 466 return drm_gem_dma_dumb_create_internal(file_priv, drm, args); 467 } 468 469 #ifdef CONFIG_DEBUG_FS 470 471 static void malidp_error_stats_init(struct malidp_error_stats *error_stats) 472 { 473 error_stats->num_errors = 0; 474 error_stats->last_error_status = 0; 475 error_stats->last_error_vblank = -1; 476 } 477 478 void malidp_error(struct malidp_drm *malidp, 479 struct malidp_error_stats *error_stats, u32 status, 480 u64 vblank) 481 { 482 unsigned long irqflags; 483 484 spin_lock_irqsave(&malidp->errors_lock, irqflags); 485 error_stats->last_error_status = status; 486 error_stats->last_error_vblank = vblank; 487 error_stats->num_errors++; 488 spin_unlock_irqrestore(&malidp->errors_lock, irqflags); 489 } 490 491 static void malidp_error_stats_dump(const char *prefix, 492 struct malidp_error_stats error_stats, 493 struct seq_file *m) 494 { 495 seq_printf(m, "[%s] num_errors : %d\n", prefix, 496 error_stats.num_errors); 497 seq_printf(m, "[%s] last_error_status : 0x%08x\n", prefix, 498 error_stats.last_error_status); 499 seq_printf(m, "[%s] last_error_vblank : %lld\n", prefix, 500 error_stats.last_error_vblank); 501 } 502 503 static int malidp_show_stats(struct seq_file *m, void *arg) 504 { 505 struct drm_device *drm = m->private; 506 struct malidp_drm *malidp = drm_to_malidp(drm); 507 unsigned long irqflags; 508 struct malidp_error_stats de_errors, se_errors; 509 510 spin_lock_irqsave(&malidp->errors_lock, irqflags); 511 de_errors = malidp->de_errors; 512 se_errors = malidp->se_errors; 513 spin_unlock_irqrestore(&malidp->errors_lock, irqflags); 514 malidp_error_stats_dump("DE", de_errors, m); 515 malidp_error_stats_dump("SE", se_errors, m); 516 return 0; 517 } 518 519 static int malidp_debugfs_open(struct inode *inode, struct file *file) 520 { 521 return single_open(file, malidp_show_stats, inode->i_private); 522 } 523 524 static ssize_t malidp_debugfs_write(struct file *file, const char __user *ubuf, 525 size_t len, loff_t *offp) 526 { 527 struct seq_file *m = file->private_data; 528 struct drm_device *drm = m->private; 529 struct malidp_drm *malidp = drm_to_malidp(drm); 530 unsigned long irqflags; 531 532 spin_lock_irqsave(&malidp->errors_lock, irqflags); 533 malidp_error_stats_init(&malidp->de_errors); 534 malidp_error_stats_init(&malidp->se_errors); 535 spin_unlock_irqrestore(&malidp->errors_lock, irqflags); 536 return len; 537 } 538 539 static const struct file_operations malidp_debugfs_fops = { 540 .owner = THIS_MODULE, 541 .open = malidp_debugfs_open, 542 .read = seq_read, 543 .write = malidp_debugfs_write, 544 .llseek = seq_lseek, 545 .release = single_release, 546 }; 547 548 static void malidp_debugfs_init(struct drm_minor *minor) 549 { 550 struct malidp_drm *malidp = drm_to_malidp(minor->dev); 551 552 malidp_error_stats_init(&malidp->de_errors); 553 malidp_error_stats_init(&malidp->se_errors); 554 spin_lock_init(&malidp->errors_lock); 555 debugfs_create_file("debug", S_IRUGO | S_IWUSR, minor->debugfs_root, 556 minor->dev, &malidp_debugfs_fops); 557 } 558 559 #endif //CONFIG_DEBUG_FS 560 561 static const struct drm_driver malidp_driver = { 562 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC, 563 DRM_GEM_DMA_DRIVER_OPS_WITH_DUMB_CREATE(malidp_dumb_create), 564 #ifdef CONFIG_DEBUG_FS 565 .debugfs_init = malidp_debugfs_init, 566 #endif 567 .fops = &fops, 568 .name = "mali-dp", 569 .desc = "ARM Mali Display Processor driver", 570 .date = "20160106", 571 .major = 1, 572 .minor = 0, 573 }; 574 575 static const struct of_device_id malidp_drm_of_match[] = { 576 { 577 .compatible = "arm,mali-dp500", 578 .data = &malidp_device[MALIDP_500] 579 }, 580 { 581 .compatible = "arm,mali-dp550", 582 .data = &malidp_device[MALIDP_550] 583 }, 584 { 585 .compatible = "arm,mali-dp650", 586 .data = &malidp_device[MALIDP_650] 587 }, 588 {}, 589 }; 590 MODULE_DEVICE_TABLE(of, malidp_drm_of_match); 591 592 static bool malidp_is_compatible_hw_id(struct malidp_hw_device *hwdev, 593 const struct of_device_id *dev_id) 594 { 595 u32 core_id; 596 const char *compatstr_dp500 = "arm,mali-dp500"; 597 bool is_dp500; 598 bool dt_is_dp500; 599 600 /* 601 * The DP500 CORE_ID register is in a different location, so check it 602 * first. If the product id field matches, then this is DP500, otherwise 603 * check the DP550/650 CORE_ID register. 604 */ 605 core_id = malidp_hw_read(hwdev, MALIDP500_DC_BASE + MALIDP_DE_CORE_ID); 606 /* Offset 0x18 will never read 0x500 on products other than DP500. */ 607 is_dp500 = (MALIDP_PRODUCT_ID(core_id) == 0x500); 608 dt_is_dp500 = strnstr(dev_id->compatible, compatstr_dp500, 609 sizeof(dev_id->compatible)) != NULL; 610 if (is_dp500 != dt_is_dp500) { 611 DRM_ERROR("Device-tree expects %s, but hardware %s DP500.\n", 612 dev_id->compatible, is_dp500 ? "is" : "is not"); 613 return false; 614 } else if (!dt_is_dp500) { 615 u16 product_id; 616 char buf[32]; 617 618 core_id = malidp_hw_read(hwdev, 619 MALIDP550_DC_BASE + MALIDP_DE_CORE_ID); 620 product_id = MALIDP_PRODUCT_ID(core_id); 621 snprintf(buf, sizeof(buf), "arm,mali-dp%X", product_id); 622 if (!strnstr(dev_id->compatible, buf, 623 sizeof(dev_id->compatible))) { 624 DRM_ERROR("Device-tree expects %s, but hardware is DP%03X.\n", 625 dev_id->compatible, product_id); 626 return false; 627 } 628 } 629 return true; 630 } 631 632 static bool malidp_has_sufficient_address_space(const struct resource *res, 633 const struct of_device_id *dev_id) 634 { 635 resource_size_t res_size = resource_size(res); 636 const char *compatstr_dp500 = "arm,mali-dp500"; 637 638 if (!strnstr(dev_id->compatible, compatstr_dp500, 639 sizeof(dev_id->compatible))) 640 return res_size >= MALIDP550_ADDR_SPACE_SIZE; 641 else if (res_size < MALIDP500_ADDR_SPACE_SIZE) 642 return false; 643 return true; 644 } 645 646 static ssize_t core_id_show(struct device *dev, struct device_attribute *attr, 647 char *buf) 648 { 649 struct drm_device *drm = dev_get_drvdata(dev); 650 struct malidp_drm *malidp = drm_to_malidp(drm); 651 652 return snprintf(buf, PAGE_SIZE, "%08x\n", malidp->core_id); 653 } 654 655 static DEVICE_ATTR_RO(core_id); 656 657 static struct attribute *mali_dp_attrs[] = { 658 &dev_attr_core_id.attr, 659 NULL, 660 }; 661 ATTRIBUTE_GROUPS(mali_dp); 662 663 #define MAX_OUTPUT_CHANNELS 3 664 665 static int malidp_runtime_pm_suspend(struct device *dev) 666 { 667 struct drm_device *drm = dev_get_drvdata(dev); 668 struct malidp_drm *malidp = drm_to_malidp(drm); 669 struct malidp_hw_device *hwdev = malidp->dev; 670 671 /* we can only suspend if the hardware is in config mode */ 672 WARN_ON(!hwdev->hw->in_config_mode(hwdev)); 673 674 malidp_se_irq_fini(hwdev); 675 malidp_de_irq_fini(hwdev); 676 hwdev->pm_suspended = true; 677 clk_disable_unprepare(hwdev->mclk); 678 clk_disable_unprepare(hwdev->aclk); 679 clk_disable_unprepare(hwdev->pclk); 680 681 return 0; 682 } 683 684 static int malidp_runtime_pm_resume(struct device *dev) 685 { 686 struct drm_device *drm = dev_get_drvdata(dev); 687 struct malidp_drm *malidp = drm_to_malidp(drm); 688 struct malidp_hw_device *hwdev = malidp->dev; 689 690 clk_prepare_enable(hwdev->pclk); 691 clk_prepare_enable(hwdev->aclk); 692 clk_prepare_enable(hwdev->mclk); 693 hwdev->pm_suspended = false; 694 malidp_de_irq_hw_init(hwdev); 695 malidp_se_irq_hw_init(hwdev); 696 697 return 0; 698 } 699 700 static int malidp_bind(struct device *dev) 701 { 702 struct resource *res; 703 struct drm_device *drm; 704 struct malidp_drm *malidp; 705 struct malidp_hw_device *hwdev; 706 struct platform_device *pdev = to_platform_device(dev); 707 struct of_device_id const *dev_id; 708 struct drm_encoder *encoder; 709 /* number of lines for the R, G and B output */ 710 u8 output_width[MAX_OUTPUT_CHANNELS]; 711 int ret = 0, i; 712 u32 version, out_depth = 0; 713 714 malidp = devm_drm_dev_alloc(dev, &malidp_driver, typeof(*malidp), base); 715 if (IS_ERR(malidp)) 716 return PTR_ERR(malidp); 717 718 drm = &malidp->base; 719 720 hwdev = drmm_kzalloc(drm, sizeof(*hwdev), GFP_KERNEL); 721 if (!hwdev) 722 return -ENOMEM; 723 724 hwdev->hw = (struct malidp_hw *)of_device_get_match_data(dev); 725 malidp->dev = hwdev; 726 727 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 728 hwdev->regs = devm_ioremap_resource(dev, res); 729 if (IS_ERR(hwdev->regs)) 730 return PTR_ERR(hwdev->regs); 731 732 hwdev->pclk = devm_clk_get(dev, "pclk"); 733 if (IS_ERR(hwdev->pclk)) 734 return PTR_ERR(hwdev->pclk); 735 736 hwdev->aclk = devm_clk_get(dev, "aclk"); 737 if (IS_ERR(hwdev->aclk)) 738 return PTR_ERR(hwdev->aclk); 739 740 hwdev->mclk = devm_clk_get(dev, "mclk"); 741 if (IS_ERR(hwdev->mclk)) 742 return PTR_ERR(hwdev->mclk); 743 744 hwdev->pxlclk = devm_clk_get(dev, "pxlclk"); 745 if (IS_ERR(hwdev->pxlclk)) 746 return PTR_ERR(hwdev->pxlclk); 747 748 /* Get the optional framebuffer memory resource */ 749 ret = of_reserved_mem_device_init(dev); 750 if (ret && ret != -ENODEV) 751 return ret; 752 753 dev_set_drvdata(dev, drm); 754 755 /* Enable power management */ 756 pm_runtime_enable(dev); 757 758 /* Resume device to enable the clocks */ 759 if (pm_runtime_enabled(dev)) 760 pm_runtime_get_sync(dev); 761 else 762 malidp_runtime_pm_resume(dev); 763 764 dev_id = of_match_device(malidp_drm_of_match, dev); 765 if (!dev_id) { 766 ret = -EINVAL; 767 goto query_hw_fail; 768 } 769 770 if (!malidp_has_sufficient_address_space(res, dev_id)) { 771 DRM_ERROR("Insufficient address space in device-tree.\n"); 772 ret = -EINVAL; 773 goto query_hw_fail; 774 } 775 776 if (!malidp_is_compatible_hw_id(hwdev, dev_id)) { 777 ret = -EINVAL; 778 goto query_hw_fail; 779 } 780 781 ret = hwdev->hw->query_hw(hwdev); 782 if (ret) { 783 DRM_ERROR("Invalid HW configuration\n"); 784 goto query_hw_fail; 785 } 786 787 version = malidp_hw_read(hwdev, hwdev->hw->map.dc_base + MALIDP_DE_CORE_ID); 788 DRM_INFO("found ARM Mali-DP%3x version r%dp%d\n", version >> 16, 789 (version >> 12) & 0xf, (version >> 8) & 0xf); 790 791 malidp->core_id = version; 792 793 ret = of_property_read_u32(dev->of_node, 794 "arm,malidp-arqos-value", 795 &hwdev->arqos_value); 796 if (ret) 797 hwdev->arqos_value = 0x0; 798 799 /* set the number of lines used for output of RGB data */ 800 ret = of_property_read_u8_array(dev->of_node, 801 "arm,malidp-output-port-lines", 802 output_width, MAX_OUTPUT_CHANNELS); 803 if (ret) 804 goto query_hw_fail; 805 806 for (i = 0; i < MAX_OUTPUT_CHANNELS; i++) 807 out_depth = (out_depth << 8) | (output_width[i] & 0xf); 808 malidp_hw_write(hwdev, out_depth, hwdev->hw->map.out_depth_base); 809 hwdev->output_color_depth = out_depth; 810 811 atomic_set(&malidp->config_valid, MALIDP_CONFIG_VALID_INIT); 812 init_waitqueue_head(&malidp->wq); 813 814 ret = malidp_init(drm); 815 if (ret < 0) 816 goto query_hw_fail; 817 818 /* Set the CRTC's port so that the encoder component can find it */ 819 malidp->crtc.port = of_graph_get_port_by_id(dev->of_node, 0); 820 821 ret = component_bind_all(dev, drm); 822 if (ret) { 823 DRM_ERROR("Failed to bind all components\n"); 824 goto bind_fail; 825 } 826 827 /* We expect to have a maximum of two encoders one for the actual 828 * display and a virtual one for the writeback connector 829 */ 830 WARN_ON(drm->mode_config.num_encoder > 2); 831 list_for_each_entry(encoder, &drm->mode_config.encoder_list, head) { 832 encoder->possible_clones = 833 (1 << drm->mode_config.num_encoder) - 1; 834 } 835 836 ret = malidp_irq_init(pdev); 837 if (ret < 0) 838 goto irq_init_fail; 839 840 ret = drm_vblank_init(drm, drm->mode_config.num_crtc); 841 if (ret < 0) { 842 DRM_ERROR("failed to initialise vblank\n"); 843 goto vblank_fail; 844 } 845 pm_runtime_put(dev); 846 847 drm_mode_config_reset(drm); 848 849 drm_kms_helper_poll_init(drm); 850 851 ret = drm_dev_register(drm, 0); 852 if (ret) 853 goto register_fail; 854 855 drm_fbdev_generic_setup(drm, 32); 856 857 return 0; 858 859 register_fail: 860 drm_kms_helper_poll_fini(drm); 861 pm_runtime_get_sync(dev); 862 vblank_fail: 863 malidp_se_irq_fini(hwdev); 864 malidp_de_irq_fini(hwdev); 865 irq_init_fail: 866 drm_atomic_helper_shutdown(drm); 867 component_unbind_all(dev, drm); 868 bind_fail: 869 of_node_put(malidp->crtc.port); 870 malidp->crtc.port = NULL; 871 query_hw_fail: 872 pm_runtime_put(dev); 873 if (pm_runtime_enabled(dev)) 874 pm_runtime_disable(dev); 875 else 876 malidp_runtime_pm_suspend(dev); 877 dev_set_drvdata(dev, NULL); 878 of_reserved_mem_device_release(dev); 879 880 return ret; 881 } 882 883 static void malidp_unbind(struct device *dev) 884 { 885 struct drm_device *drm = dev_get_drvdata(dev); 886 struct malidp_drm *malidp = drm_to_malidp(drm); 887 struct malidp_hw_device *hwdev = malidp->dev; 888 889 drm_dev_unregister(drm); 890 drm_kms_helper_poll_fini(drm); 891 pm_runtime_get_sync(dev); 892 drm_atomic_helper_shutdown(drm); 893 malidp_se_irq_fini(hwdev); 894 malidp_de_irq_fini(hwdev); 895 component_unbind_all(dev, drm); 896 of_node_put(malidp->crtc.port); 897 malidp->crtc.port = NULL; 898 pm_runtime_put(dev); 899 if (pm_runtime_enabled(dev)) 900 pm_runtime_disable(dev); 901 else 902 malidp_runtime_pm_suspend(dev); 903 dev_set_drvdata(dev, NULL); 904 of_reserved_mem_device_release(dev); 905 } 906 907 static const struct component_master_ops malidp_master_ops = { 908 .bind = malidp_bind, 909 .unbind = malidp_unbind, 910 }; 911 912 static int malidp_compare_dev(struct device *dev, void *data) 913 { 914 struct device_node *np = data; 915 916 return dev->of_node == np; 917 } 918 919 static int malidp_platform_probe(struct platform_device *pdev) 920 { 921 struct device_node *port; 922 struct component_match *match = NULL; 923 924 if (!pdev->dev.of_node) 925 return -ENODEV; 926 927 /* there is only one output port inside each device, find it */ 928 port = of_graph_get_remote_node(pdev->dev.of_node, 0, 0); 929 if (!port) 930 return -ENODEV; 931 932 drm_of_component_match_add(&pdev->dev, &match, malidp_compare_dev, 933 port); 934 of_node_put(port); 935 return component_master_add_with_match(&pdev->dev, &malidp_master_ops, 936 match); 937 } 938 939 static int malidp_platform_remove(struct platform_device *pdev) 940 { 941 component_master_del(&pdev->dev, &malidp_master_ops); 942 return 0; 943 } 944 945 static int __maybe_unused malidp_pm_suspend(struct device *dev) 946 { 947 struct drm_device *drm = dev_get_drvdata(dev); 948 949 return drm_mode_config_helper_suspend(drm); 950 } 951 952 static int __maybe_unused malidp_pm_resume(struct device *dev) 953 { 954 struct drm_device *drm = dev_get_drvdata(dev); 955 956 drm_mode_config_helper_resume(drm); 957 958 return 0; 959 } 960 961 static int __maybe_unused malidp_pm_suspend_late(struct device *dev) 962 { 963 if (!pm_runtime_status_suspended(dev)) { 964 malidp_runtime_pm_suspend(dev); 965 pm_runtime_set_suspended(dev); 966 } 967 return 0; 968 } 969 970 static int __maybe_unused malidp_pm_resume_early(struct device *dev) 971 { 972 malidp_runtime_pm_resume(dev); 973 pm_runtime_set_active(dev); 974 return 0; 975 } 976 977 static const struct dev_pm_ops malidp_pm_ops = { 978 SET_SYSTEM_SLEEP_PM_OPS(malidp_pm_suspend, malidp_pm_resume) \ 979 SET_LATE_SYSTEM_SLEEP_PM_OPS(malidp_pm_suspend_late, malidp_pm_resume_early) \ 980 SET_RUNTIME_PM_OPS(malidp_runtime_pm_suspend, malidp_runtime_pm_resume, NULL) 981 }; 982 983 static struct platform_driver malidp_platform_driver = { 984 .probe = malidp_platform_probe, 985 .remove = malidp_platform_remove, 986 .driver = { 987 .name = "mali-dp", 988 .pm = &malidp_pm_ops, 989 .of_match_table = malidp_drm_of_match, 990 .dev_groups = mali_dp_groups, 991 }, 992 }; 993 994 drm_module_platform_driver(malidp_platform_driver); 995 996 MODULE_AUTHOR("Liviu Dudau <Liviu.Dudau@arm.com>"); 997 MODULE_DESCRIPTION("ARM Mali DP DRM driver"); 998 MODULE_LICENSE("GPL v2"); 999