1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2012 Avionic Design GmbH 4 * Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved. 5 */ 6 7 #include <linux/clk.h> 8 #include <linux/debugfs.h> 9 #include <linux/delay.h> 10 #include <linux/iommu.h> 11 #include <linux/module.h> 12 #include <linux/of_device.h> 13 #include <linux/pm_runtime.h> 14 #include <linux/reset.h> 15 16 #include <soc/tegra/pmc.h> 17 18 #include <drm/drm_atomic.h> 19 #include <drm/drm_atomic_helper.h> 20 #include <drm/drm_debugfs.h> 21 #include <drm/drm_fourcc.h> 22 #include <drm/drm_plane_helper.h> 23 #include <drm/drm_vblank.h> 24 25 #include "dc.h" 26 #include "drm.h" 27 #include "gem.h" 28 #include "hub.h" 29 #include "plane.h" 30 31 static void tegra_crtc_atomic_destroy_state(struct drm_crtc *crtc, 32 struct drm_crtc_state *state); 33 34 static void tegra_dc_stats_reset(struct tegra_dc_stats *stats) 35 { 36 stats->frames = 0; 37 stats->vblank = 0; 38 stats->underflow = 0; 39 stats->overflow = 0; 40 } 41 42 /* Reads the active copy of a register. */ 43 static u32 tegra_dc_readl_active(struct tegra_dc *dc, unsigned long offset) 44 { 45 u32 value; 46 47 tegra_dc_writel(dc, READ_MUX, DC_CMD_STATE_ACCESS); 48 value = tegra_dc_readl(dc, offset); 49 tegra_dc_writel(dc, 0, DC_CMD_STATE_ACCESS); 50 51 return value; 52 } 53 54 static inline unsigned int tegra_plane_offset(struct tegra_plane *plane, 55 unsigned int offset) 56 { 57 if (offset >= 0x500 && offset <= 0x638) { 58 offset = 0x000 + (offset - 0x500); 59 return plane->offset + offset; 60 } 61 62 if (offset >= 0x700 && offset <= 0x719) { 63 offset = 0x180 + (offset - 0x700); 64 return plane->offset + offset; 65 } 66 67 if (offset >= 0x800 && offset <= 0x839) { 68 offset = 0x1c0 + (offset - 0x800); 69 return plane->offset + offset; 70 } 71 72 dev_WARN(plane->dc->dev, "invalid offset: %x\n", offset); 73 74 return plane->offset + offset; 75 } 76 77 static inline u32 tegra_plane_readl(struct tegra_plane *plane, 78 unsigned int offset) 79 { 80 return tegra_dc_readl(plane->dc, tegra_plane_offset(plane, offset)); 81 } 82 83 static inline void tegra_plane_writel(struct tegra_plane *plane, u32 value, 84 unsigned int offset) 85 { 86 tegra_dc_writel(plane->dc, value, tegra_plane_offset(plane, offset)); 87 } 88 89 bool tegra_dc_has_output(struct tegra_dc *dc, struct device *dev) 90 { 91 struct device_node *np = dc->dev->of_node; 92 struct of_phandle_iterator it; 93 int err; 94 95 of_for_each_phandle(&it, err, np, "nvidia,outputs", NULL, 0) 96 if (it.node == dev->of_node) 97 return true; 98 99 return false; 100 } 101 102 /* 103 * Double-buffered registers have two copies: ASSEMBLY and ACTIVE. When the 104 * *_ACT_REQ bits are set the ASSEMBLY copy is latched into the ACTIVE copy. 105 * Latching happens mmediately if the display controller is in STOP mode or 106 * on the next frame boundary otherwise. 107 * 108 * Triple-buffered registers have three copies: ASSEMBLY, ARM and ACTIVE. The 109 * ASSEMBLY copy is latched into the ARM copy immediately after *_UPDATE bits 110 * are written. When the *_ACT_REQ bits are written, the ARM copy is latched 111 * into the ACTIVE copy, either immediately if the display controller is in 112 * STOP mode, or at the next frame boundary otherwise. 113 */ 114 void tegra_dc_commit(struct tegra_dc *dc) 115 { 116 tegra_dc_writel(dc, GENERAL_ACT_REQ << 8, DC_CMD_STATE_CONTROL); 117 tegra_dc_writel(dc, GENERAL_ACT_REQ, DC_CMD_STATE_CONTROL); 118 } 119 120 static inline u32 compute_dda_inc(unsigned int in, unsigned int out, bool v, 121 unsigned int bpp) 122 { 123 fixed20_12 outf = dfixed_init(out); 124 fixed20_12 inf = dfixed_init(in); 125 u32 dda_inc; 126 int max; 127 128 if (v) 129 max = 15; 130 else { 131 switch (bpp) { 132 case 2: 133 max = 8; 134 break; 135 136 default: 137 WARN_ON_ONCE(1); 138 /* fallthrough */ 139 case 4: 140 max = 4; 141 break; 142 } 143 } 144 145 outf.full = max_t(u32, outf.full - dfixed_const(1), dfixed_const(1)); 146 inf.full -= dfixed_const(1); 147 148 dda_inc = dfixed_div(inf, outf); 149 dda_inc = min_t(u32, dda_inc, dfixed_const(max)); 150 151 return dda_inc; 152 } 153 154 static inline u32 compute_initial_dda(unsigned int in) 155 { 156 fixed20_12 inf = dfixed_init(in); 157 return dfixed_frac(inf); 158 } 159 160 static void tegra_plane_setup_blending_legacy(struct tegra_plane *plane) 161 { 162 u32 background[3] = { 163 BLEND_WEIGHT1(0) | BLEND_WEIGHT0(0) | BLEND_COLOR_KEY_NONE, 164 BLEND_WEIGHT1(0) | BLEND_WEIGHT0(0) | BLEND_COLOR_KEY_NONE, 165 BLEND_WEIGHT1(0) | BLEND_WEIGHT0(0) | BLEND_COLOR_KEY_NONE, 166 }; 167 u32 foreground = BLEND_WEIGHT1(255) | BLEND_WEIGHT0(255) | 168 BLEND_COLOR_KEY_NONE; 169 u32 blendnokey = BLEND_WEIGHT1(255) | BLEND_WEIGHT0(255); 170 struct tegra_plane_state *state; 171 u32 blending[2]; 172 unsigned int i; 173 174 /* disable blending for non-overlapping case */ 175 tegra_plane_writel(plane, blendnokey, DC_WIN_BLEND_NOKEY); 176 tegra_plane_writel(plane, foreground, DC_WIN_BLEND_1WIN); 177 178 state = to_tegra_plane_state(plane->base.state); 179 180 if (state->opaque) { 181 /* 182 * Since custom fix-weight blending isn't utilized and weight 183 * of top window is set to max, we can enforce dependent 184 * blending which in this case results in transparent bottom 185 * window if top window is opaque and if top window enables 186 * alpha blending, then bottom window is getting alpha value 187 * of 1 minus the sum of alpha components of the overlapping 188 * plane. 189 */ 190 background[0] |= BLEND_CONTROL_DEPENDENT; 191 background[1] |= BLEND_CONTROL_DEPENDENT; 192 193 /* 194 * The region where three windows overlap is the intersection 195 * of the two regions where two windows overlap. It contributes 196 * to the area if all of the windows on top of it have an alpha 197 * component. 198 */ 199 switch (state->base.normalized_zpos) { 200 case 0: 201 if (state->blending[0].alpha && 202 state->blending[1].alpha) 203 background[2] |= BLEND_CONTROL_DEPENDENT; 204 break; 205 206 case 1: 207 background[2] |= BLEND_CONTROL_DEPENDENT; 208 break; 209 } 210 } else { 211 /* 212 * Enable alpha blending if pixel format has an alpha 213 * component. 214 */ 215 foreground |= BLEND_CONTROL_ALPHA; 216 217 /* 218 * If any of the windows on top of this window is opaque, it 219 * will completely conceal this window within that area. If 220 * top window has an alpha component, it is blended over the 221 * bottom window. 222 */ 223 for (i = 0; i < 2; i++) { 224 if (state->blending[i].alpha && 225 state->blending[i].top) 226 background[i] |= BLEND_CONTROL_DEPENDENT; 227 } 228 229 switch (state->base.normalized_zpos) { 230 case 0: 231 if (state->blending[0].alpha && 232 state->blending[1].alpha) 233 background[2] |= BLEND_CONTROL_DEPENDENT; 234 break; 235 236 case 1: 237 /* 238 * When both middle and topmost windows have an alpha, 239 * these windows a mixed together and then the result 240 * is blended over the bottom window. 241 */ 242 if (state->blending[0].alpha && 243 state->blending[0].top) 244 background[2] |= BLEND_CONTROL_ALPHA; 245 246 if (state->blending[1].alpha && 247 state->blending[1].top) 248 background[2] |= BLEND_CONTROL_ALPHA; 249 break; 250 } 251 } 252 253 switch (state->base.normalized_zpos) { 254 case 0: 255 tegra_plane_writel(plane, background[0], DC_WIN_BLEND_2WIN_X); 256 tegra_plane_writel(plane, background[1], DC_WIN_BLEND_2WIN_Y); 257 tegra_plane_writel(plane, background[2], DC_WIN_BLEND_3WIN_XY); 258 break; 259 260 case 1: 261 /* 262 * If window B / C is topmost, then X / Y registers are 263 * matching the order of blending[...] state indices, 264 * otherwise a swap is required. 265 */ 266 if (!state->blending[0].top && state->blending[1].top) { 267 blending[0] = foreground; 268 blending[1] = background[1]; 269 } else { 270 blending[0] = background[0]; 271 blending[1] = foreground; 272 } 273 274 tegra_plane_writel(plane, blending[0], DC_WIN_BLEND_2WIN_X); 275 tegra_plane_writel(plane, blending[1], DC_WIN_BLEND_2WIN_Y); 276 tegra_plane_writel(plane, background[2], DC_WIN_BLEND_3WIN_XY); 277 break; 278 279 case 2: 280 tegra_plane_writel(plane, foreground, DC_WIN_BLEND_2WIN_X); 281 tegra_plane_writel(plane, foreground, DC_WIN_BLEND_2WIN_Y); 282 tegra_plane_writel(plane, foreground, DC_WIN_BLEND_3WIN_XY); 283 break; 284 } 285 } 286 287 static void tegra_plane_setup_blending(struct tegra_plane *plane, 288 const struct tegra_dc_window *window) 289 { 290 u32 value; 291 292 value = BLEND_FACTOR_DST_ALPHA_ZERO | BLEND_FACTOR_SRC_ALPHA_K2 | 293 BLEND_FACTOR_DST_COLOR_NEG_K1_TIMES_SRC | 294 BLEND_FACTOR_SRC_COLOR_K1_TIMES_SRC; 295 tegra_plane_writel(plane, value, DC_WIN_BLEND_MATCH_SELECT); 296 297 value = BLEND_FACTOR_DST_ALPHA_ZERO | BLEND_FACTOR_SRC_ALPHA_K2 | 298 BLEND_FACTOR_DST_COLOR_NEG_K1_TIMES_SRC | 299 BLEND_FACTOR_SRC_COLOR_K1_TIMES_SRC; 300 tegra_plane_writel(plane, value, DC_WIN_BLEND_NOMATCH_SELECT); 301 302 value = K2(255) | K1(255) | WINDOW_LAYER_DEPTH(255 - window->zpos); 303 tegra_plane_writel(plane, value, DC_WIN_BLEND_LAYER_CONTROL); 304 } 305 306 static bool 307 tegra_plane_use_horizontal_filtering(struct tegra_plane *plane, 308 const struct tegra_dc_window *window) 309 { 310 struct tegra_dc *dc = plane->dc; 311 312 if (window->src.w == window->dst.w) 313 return false; 314 315 if (plane->index == 0 && dc->soc->has_win_a_without_filters) 316 return false; 317 318 return true; 319 } 320 321 static bool 322 tegra_plane_use_vertical_filtering(struct tegra_plane *plane, 323 const struct tegra_dc_window *window) 324 { 325 struct tegra_dc *dc = plane->dc; 326 327 if (window->src.h == window->dst.h) 328 return false; 329 330 if (plane->index == 0 && dc->soc->has_win_a_without_filters) 331 return false; 332 333 if (plane->index == 2 && dc->soc->has_win_c_without_vert_filter) 334 return false; 335 336 return true; 337 } 338 339 static void tegra_dc_setup_window(struct tegra_plane *plane, 340 const struct tegra_dc_window *window) 341 { 342 unsigned h_offset, v_offset, h_size, v_size, h_dda, v_dda, bpp; 343 struct tegra_dc *dc = plane->dc; 344 bool yuv, planar; 345 u32 value; 346 347 /* 348 * For YUV planar modes, the number of bytes per pixel takes into 349 * account only the luma component and therefore is 1. 350 */ 351 yuv = tegra_plane_format_is_yuv(window->format, &planar); 352 if (!yuv) 353 bpp = window->bits_per_pixel / 8; 354 else 355 bpp = planar ? 1 : 2; 356 357 tegra_plane_writel(plane, window->format, DC_WIN_COLOR_DEPTH); 358 tegra_plane_writel(plane, window->swap, DC_WIN_BYTE_SWAP); 359 360 value = V_POSITION(window->dst.y) | H_POSITION(window->dst.x); 361 tegra_plane_writel(plane, value, DC_WIN_POSITION); 362 363 value = V_SIZE(window->dst.h) | H_SIZE(window->dst.w); 364 tegra_plane_writel(plane, value, DC_WIN_SIZE); 365 366 h_offset = window->src.x * bpp; 367 v_offset = window->src.y; 368 h_size = window->src.w * bpp; 369 v_size = window->src.h; 370 371 value = V_PRESCALED_SIZE(v_size) | H_PRESCALED_SIZE(h_size); 372 tegra_plane_writel(plane, value, DC_WIN_PRESCALED_SIZE); 373 374 /* 375 * For DDA computations the number of bytes per pixel for YUV planar 376 * modes needs to take into account all Y, U and V components. 377 */ 378 if (yuv && planar) 379 bpp = 2; 380 381 h_dda = compute_dda_inc(window->src.w, window->dst.w, false, bpp); 382 v_dda = compute_dda_inc(window->src.h, window->dst.h, true, bpp); 383 384 value = V_DDA_INC(v_dda) | H_DDA_INC(h_dda); 385 tegra_plane_writel(plane, value, DC_WIN_DDA_INC); 386 387 h_dda = compute_initial_dda(window->src.x); 388 v_dda = compute_initial_dda(window->src.y); 389 390 tegra_plane_writel(plane, h_dda, DC_WIN_H_INITIAL_DDA); 391 tegra_plane_writel(plane, v_dda, DC_WIN_V_INITIAL_DDA); 392 393 tegra_plane_writel(plane, 0, DC_WIN_UV_BUF_STRIDE); 394 tegra_plane_writel(plane, 0, DC_WIN_BUF_STRIDE); 395 396 tegra_plane_writel(plane, window->base[0], DC_WINBUF_START_ADDR); 397 398 if (yuv && planar) { 399 tegra_plane_writel(plane, window->base[1], DC_WINBUF_START_ADDR_U); 400 tegra_plane_writel(plane, window->base[2], DC_WINBUF_START_ADDR_V); 401 value = window->stride[1] << 16 | window->stride[0]; 402 tegra_plane_writel(plane, value, DC_WIN_LINE_STRIDE); 403 } else { 404 tegra_plane_writel(plane, window->stride[0], DC_WIN_LINE_STRIDE); 405 } 406 407 if (window->bottom_up) 408 v_offset += window->src.h - 1; 409 410 tegra_plane_writel(plane, h_offset, DC_WINBUF_ADDR_H_OFFSET); 411 tegra_plane_writel(plane, v_offset, DC_WINBUF_ADDR_V_OFFSET); 412 413 if (dc->soc->supports_block_linear) { 414 unsigned long height = window->tiling.value; 415 416 switch (window->tiling.mode) { 417 case TEGRA_BO_TILING_MODE_PITCH: 418 value = DC_WINBUF_SURFACE_KIND_PITCH; 419 break; 420 421 case TEGRA_BO_TILING_MODE_TILED: 422 value = DC_WINBUF_SURFACE_KIND_TILED; 423 break; 424 425 case TEGRA_BO_TILING_MODE_BLOCK: 426 value = DC_WINBUF_SURFACE_KIND_BLOCK_HEIGHT(height) | 427 DC_WINBUF_SURFACE_KIND_BLOCK; 428 break; 429 } 430 431 tegra_plane_writel(plane, value, DC_WINBUF_SURFACE_KIND); 432 } else { 433 switch (window->tiling.mode) { 434 case TEGRA_BO_TILING_MODE_PITCH: 435 value = DC_WIN_BUFFER_ADDR_MODE_LINEAR_UV | 436 DC_WIN_BUFFER_ADDR_MODE_LINEAR; 437 break; 438 439 case TEGRA_BO_TILING_MODE_TILED: 440 value = DC_WIN_BUFFER_ADDR_MODE_TILE_UV | 441 DC_WIN_BUFFER_ADDR_MODE_TILE; 442 break; 443 444 case TEGRA_BO_TILING_MODE_BLOCK: 445 /* 446 * No need to handle this here because ->atomic_check 447 * will already have filtered it out. 448 */ 449 break; 450 } 451 452 tegra_plane_writel(plane, value, DC_WIN_BUFFER_ADDR_MODE); 453 } 454 455 value = WIN_ENABLE; 456 457 if (yuv) { 458 /* setup default colorspace conversion coefficients */ 459 tegra_plane_writel(plane, 0x00f0, DC_WIN_CSC_YOF); 460 tegra_plane_writel(plane, 0x012a, DC_WIN_CSC_KYRGB); 461 tegra_plane_writel(plane, 0x0000, DC_WIN_CSC_KUR); 462 tegra_plane_writel(plane, 0x0198, DC_WIN_CSC_KVR); 463 tegra_plane_writel(plane, 0x039b, DC_WIN_CSC_KUG); 464 tegra_plane_writel(plane, 0x032f, DC_WIN_CSC_KVG); 465 tegra_plane_writel(plane, 0x0204, DC_WIN_CSC_KUB); 466 tegra_plane_writel(plane, 0x0000, DC_WIN_CSC_KVB); 467 468 value |= CSC_ENABLE; 469 } else if (window->bits_per_pixel < 24) { 470 value |= COLOR_EXPAND; 471 } 472 473 if (window->bottom_up) 474 value |= V_DIRECTION; 475 476 if (tegra_plane_use_horizontal_filtering(plane, window)) { 477 /* 478 * Enable horizontal 6-tap filter and set filtering 479 * coefficients to the default values defined in TRM. 480 */ 481 tegra_plane_writel(plane, 0x00008000, DC_WIN_H_FILTER_P(0)); 482 tegra_plane_writel(plane, 0x3e087ce1, DC_WIN_H_FILTER_P(1)); 483 tegra_plane_writel(plane, 0x3b117ac1, DC_WIN_H_FILTER_P(2)); 484 tegra_plane_writel(plane, 0x591b73aa, DC_WIN_H_FILTER_P(3)); 485 tegra_plane_writel(plane, 0x57256d9a, DC_WIN_H_FILTER_P(4)); 486 tegra_plane_writel(plane, 0x552f668b, DC_WIN_H_FILTER_P(5)); 487 tegra_plane_writel(plane, 0x73385e8b, DC_WIN_H_FILTER_P(6)); 488 tegra_plane_writel(plane, 0x72435583, DC_WIN_H_FILTER_P(7)); 489 tegra_plane_writel(plane, 0x714c4c8b, DC_WIN_H_FILTER_P(8)); 490 tegra_plane_writel(plane, 0x70554393, DC_WIN_H_FILTER_P(9)); 491 tegra_plane_writel(plane, 0x715e389b, DC_WIN_H_FILTER_P(10)); 492 tegra_plane_writel(plane, 0x71662faa, DC_WIN_H_FILTER_P(11)); 493 tegra_plane_writel(plane, 0x536d25ba, DC_WIN_H_FILTER_P(12)); 494 tegra_plane_writel(plane, 0x55731bca, DC_WIN_H_FILTER_P(13)); 495 tegra_plane_writel(plane, 0x387a11d9, DC_WIN_H_FILTER_P(14)); 496 tegra_plane_writel(plane, 0x3c7c08f1, DC_WIN_H_FILTER_P(15)); 497 498 value |= H_FILTER; 499 } 500 501 if (tegra_plane_use_vertical_filtering(plane, window)) { 502 unsigned int i, k; 503 504 /* 505 * Enable vertical 2-tap filter and set filtering 506 * coefficients to the default values defined in TRM. 507 */ 508 for (i = 0, k = 128; i < 16; i++, k -= 8) 509 tegra_plane_writel(plane, k, DC_WIN_V_FILTER_P(i)); 510 511 value |= V_FILTER; 512 } 513 514 tegra_plane_writel(plane, value, DC_WIN_WIN_OPTIONS); 515 516 if (dc->soc->has_legacy_blending) 517 tegra_plane_setup_blending_legacy(plane); 518 else 519 tegra_plane_setup_blending(plane, window); 520 } 521 522 static const u32 tegra20_primary_formats[] = { 523 DRM_FORMAT_ARGB4444, 524 DRM_FORMAT_ARGB1555, 525 DRM_FORMAT_RGB565, 526 DRM_FORMAT_RGBA5551, 527 DRM_FORMAT_ABGR8888, 528 DRM_FORMAT_ARGB8888, 529 /* non-native formats */ 530 DRM_FORMAT_XRGB1555, 531 DRM_FORMAT_RGBX5551, 532 DRM_FORMAT_XBGR8888, 533 DRM_FORMAT_XRGB8888, 534 }; 535 536 static const u64 tegra20_modifiers[] = { 537 DRM_FORMAT_MOD_LINEAR, 538 DRM_FORMAT_MOD_NVIDIA_TEGRA_TILED, 539 DRM_FORMAT_MOD_INVALID 540 }; 541 542 static const u32 tegra114_primary_formats[] = { 543 DRM_FORMAT_ARGB4444, 544 DRM_FORMAT_ARGB1555, 545 DRM_FORMAT_RGB565, 546 DRM_FORMAT_RGBA5551, 547 DRM_FORMAT_ABGR8888, 548 DRM_FORMAT_ARGB8888, 549 /* new on Tegra114 */ 550 DRM_FORMAT_ABGR4444, 551 DRM_FORMAT_ABGR1555, 552 DRM_FORMAT_BGRA5551, 553 DRM_FORMAT_XRGB1555, 554 DRM_FORMAT_RGBX5551, 555 DRM_FORMAT_XBGR1555, 556 DRM_FORMAT_BGRX5551, 557 DRM_FORMAT_BGR565, 558 DRM_FORMAT_BGRA8888, 559 DRM_FORMAT_RGBA8888, 560 DRM_FORMAT_XRGB8888, 561 DRM_FORMAT_XBGR8888, 562 }; 563 564 static const u32 tegra124_primary_formats[] = { 565 DRM_FORMAT_ARGB4444, 566 DRM_FORMAT_ARGB1555, 567 DRM_FORMAT_RGB565, 568 DRM_FORMAT_RGBA5551, 569 DRM_FORMAT_ABGR8888, 570 DRM_FORMAT_ARGB8888, 571 /* new on Tegra114 */ 572 DRM_FORMAT_ABGR4444, 573 DRM_FORMAT_ABGR1555, 574 DRM_FORMAT_BGRA5551, 575 DRM_FORMAT_XRGB1555, 576 DRM_FORMAT_RGBX5551, 577 DRM_FORMAT_XBGR1555, 578 DRM_FORMAT_BGRX5551, 579 DRM_FORMAT_BGR565, 580 DRM_FORMAT_BGRA8888, 581 DRM_FORMAT_RGBA8888, 582 DRM_FORMAT_XRGB8888, 583 DRM_FORMAT_XBGR8888, 584 /* new on Tegra124 */ 585 DRM_FORMAT_RGBX8888, 586 DRM_FORMAT_BGRX8888, 587 }; 588 589 static const u64 tegra124_modifiers[] = { 590 DRM_FORMAT_MOD_LINEAR, 591 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(0), 592 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(1), 593 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(2), 594 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(3), 595 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(4), 596 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(5), 597 DRM_FORMAT_MOD_INVALID 598 }; 599 600 static int tegra_plane_atomic_check(struct drm_plane *plane, 601 struct drm_plane_state *state) 602 { 603 struct tegra_plane_state *plane_state = to_tegra_plane_state(state); 604 unsigned int rotation = DRM_MODE_ROTATE_0 | DRM_MODE_REFLECT_Y; 605 struct tegra_bo_tiling *tiling = &plane_state->tiling; 606 struct tegra_plane *tegra = to_tegra_plane(plane); 607 struct tegra_dc *dc = to_tegra_dc(state->crtc); 608 int err; 609 610 /* no need for further checks if the plane is being disabled */ 611 if (!state->crtc) 612 return 0; 613 614 err = tegra_plane_format(state->fb->format->format, 615 &plane_state->format, 616 &plane_state->swap); 617 if (err < 0) 618 return err; 619 620 /* 621 * Tegra20 and Tegra30 are special cases here because they support 622 * only variants of specific formats with an alpha component, but not 623 * the corresponding opaque formats. However, the opaque formats can 624 * be emulated by disabling alpha blending for the plane. 625 */ 626 if (dc->soc->has_legacy_blending) { 627 err = tegra_plane_setup_legacy_state(tegra, plane_state); 628 if (err < 0) 629 return err; 630 } 631 632 err = tegra_fb_get_tiling(state->fb, tiling); 633 if (err < 0) 634 return err; 635 636 if (tiling->mode == TEGRA_BO_TILING_MODE_BLOCK && 637 !dc->soc->supports_block_linear) { 638 DRM_ERROR("hardware doesn't support block linear mode\n"); 639 return -EINVAL; 640 } 641 642 rotation = drm_rotation_simplify(state->rotation, rotation); 643 644 if (rotation & DRM_MODE_REFLECT_Y) 645 plane_state->bottom_up = true; 646 else 647 plane_state->bottom_up = false; 648 649 /* 650 * Tegra doesn't support different strides for U and V planes so we 651 * error out if the user tries to display a framebuffer with such a 652 * configuration. 653 */ 654 if (state->fb->format->num_planes > 2) { 655 if (state->fb->pitches[2] != state->fb->pitches[1]) { 656 DRM_ERROR("unsupported UV-plane configuration\n"); 657 return -EINVAL; 658 } 659 } 660 661 err = tegra_plane_state_add(tegra, state); 662 if (err < 0) 663 return err; 664 665 return 0; 666 } 667 668 static void tegra_plane_atomic_disable(struct drm_plane *plane, 669 struct drm_plane_state *old_state) 670 { 671 struct tegra_plane *p = to_tegra_plane(plane); 672 u32 value; 673 674 /* rien ne va plus */ 675 if (!old_state || !old_state->crtc) 676 return; 677 678 value = tegra_plane_readl(p, DC_WIN_WIN_OPTIONS); 679 value &= ~WIN_ENABLE; 680 tegra_plane_writel(p, value, DC_WIN_WIN_OPTIONS); 681 } 682 683 static void tegra_plane_atomic_update(struct drm_plane *plane, 684 struct drm_plane_state *old_state) 685 { 686 struct tegra_plane_state *state = to_tegra_plane_state(plane->state); 687 struct drm_framebuffer *fb = plane->state->fb; 688 struct tegra_plane *p = to_tegra_plane(plane); 689 struct tegra_dc_window window; 690 unsigned int i; 691 692 /* rien ne va plus */ 693 if (!plane->state->crtc || !plane->state->fb) 694 return; 695 696 if (!plane->state->visible) 697 return tegra_plane_atomic_disable(plane, old_state); 698 699 memset(&window, 0, sizeof(window)); 700 window.src.x = plane->state->src.x1 >> 16; 701 window.src.y = plane->state->src.y1 >> 16; 702 window.src.w = drm_rect_width(&plane->state->src) >> 16; 703 window.src.h = drm_rect_height(&plane->state->src) >> 16; 704 window.dst.x = plane->state->dst.x1; 705 window.dst.y = plane->state->dst.y1; 706 window.dst.w = drm_rect_width(&plane->state->dst); 707 window.dst.h = drm_rect_height(&plane->state->dst); 708 window.bits_per_pixel = fb->format->cpp[0] * 8; 709 window.bottom_up = tegra_fb_is_bottom_up(fb) || state->bottom_up; 710 711 /* copy from state */ 712 window.zpos = plane->state->normalized_zpos; 713 window.tiling = state->tiling; 714 window.format = state->format; 715 window.swap = state->swap; 716 717 for (i = 0; i < fb->format->num_planes; i++) { 718 window.base[i] = state->iova[i] + fb->offsets[i]; 719 720 /* 721 * Tegra uses a shared stride for UV planes. Framebuffers are 722 * already checked for this in the tegra_plane_atomic_check() 723 * function, so it's safe to ignore the V-plane pitch here. 724 */ 725 if (i < 2) 726 window.stride[i] = fb->pitches[i]; 727 } 728 729 tegra_dc_setup_window(p, &window); 730 } 731 732 static const struct drm_plane_helper_funcs tegra_plane_helper_funcs = { 733 .prepare_fb = tegra_plane_prepare_fb, 734 .cleanup_fb = tegra_plane_cleanup_fb, 735 .atomic_check = tegra_plane_atomic_check, 736 .atomic_disable = tegra_plane_atomic_disable, 737 .atomic_update = tegra_plane_atomic_update, 738 }; 739 740 static unsigned long tegra_plane_get_possible_crtcs(struct drm_device *drm) 741 { 742 /* 743 * Ideally this would use drm_crtc_mask(), but that would require the 744 * CRTC to already be in the mode_config's list of CRTCs. However, it 745 * will only be added to that list in the drm_crtc_init_with_planes() 746 * (in tegra_dc_init()), which in turn requires registration of these 747 * planes. So we have ourselves a nice little chicken and egg problem 748 * here. 749 * 750 * We work around this by manually creating the mask from the number 751 * of CRTCs that have been registered, and should therefore always be 752 * the same as drm_crtc_index() after registration. 753 */ 754 return 1 << drm->mode_config.num_crtc; 755 } 756 757 static struct drm_plane *tegra_primary_plane_create(struct drm_device *drm, 758 struct tegra_dc *dc) 759 { 760 unsigned long possible_crtcs = tegra_plane_get_possible_crtcs(drm); 761 enum drm_plane_type type = DRM_PLANE_TYPE_PRIMARY; 762 struct tegra_plane *plane; 763 unsigned int num_formats; 764 const u64 *modifiers; 765 const u32 *formats; 766 int err; 767 768 plane = kzalloc(sizeof(*plane), GFP_KERNEL); 769 if (!plane) 770 return ERR_PTR(-ENOMEM); 771 772 /* Always use window A as primary window */ 773 plane->offset = 0xa00; 774 plane->index = 0; 775 plane->dc = dc; 776 777 num_formats = dc->soc->num_primary_formats; 778 formats = dc->soc->primary_formats; 779 modifiers = dc->soc->modifiers; 780 781 err = drm_universal_plane_init(drm, &plane->base, possible_crtcs, 782 &tegra_plane_funcs, formats, 783 num_formats, modifiers, type, NULL); 784 if (err < 0) { 785 kfree(plane); 786 return ERR_PTR(err); 787 } 788 789 drm_plane_helper_add(&plane->base, &tegra_plane_helper_funcs); 790 drm_plane_create_zpos_property(&plane->base, plane->index, 0, 255); 791 792 err = drm_plane_create_rotation_property(&plane->base, 793 DRM_MODE_ROTATE_0, 794 DRM_MODE_ROTATE_0 | 795 DRM_MODE_REFLECT_Y); 796 if (err < 0) 797 dev_err(dc->dev, "failed to create rotation property: %d\n", 798 err); 799 800 return &plane->base; 801 } 802 803 static const u32 tegra_cursor_plane_formats[] = { 804 DRM_FORMAT_RGBA8888, 805 }; 806 807 static int tegra_cursor_atomic_check(struct drm_plane *plane, 808 struct drm_plane_state *state) 809 { 810 struct tegra_plane *tegra = to_tegra_plane(plane); 811 int err; 812 813 /* no need for further checks if the plane is being disabled */ 814 if (!state->crtc) 815 return 0; 816 817 /* scaling not supported for cursor */ 818 if ((state->src_w >> 16 != state->crtc_w) || 819 (state->src_h >> 16 != state->crtc_h)) 820 return -EINVAL; 821 822 /* only square cursors supported */ 823 if (state->src_w != state->src_h) 824 return -EINVAL; 825 826 if (state->crtc_w != 32 && state->crtc_w != 64 && 827 state->crtc_w != 128 && state->crtc_w != 256) 828 return -EINVAL; 829 830 err = tegra_plane_state_add(tegra, state); 831 if (err < 0) 832 return err; 833 834 return 0; 835 } 836 837 static void tegra_cursor_atomic_update(struct drm_plane *plane, 838 struct drm_plane_state *old_state) 839 { 840 struct tegra_plane_state *state = to_tegra_plane_state(plane->state); 841 struct tegra_dc *dc = to_tegra_dc(plane->state->crtc); 842 u32 value = CURSOR_CLIP_DISPLAY; 843 844 /* rien ne va plus */ 845 if (!plane->state->crtc || !plane->state->fb) 846 return; 847 848 switch (plane->state->crtc_w) { 849 case 32: 850 value |= CURSOR_SIZE_32x32; 851 break; 852 853 case 64: 854 value |= CURSOR_SIZE_64x64; 855 break; 856 857 case 128: 858 value |= CURSOR_SIZE_128x128; 859 break; 860 861 case 256: 862 value |= CURSOR_SIZE_256x256; 863 break; 864 865 default: 866 WARN(1, "cursor size %ux%u not supported\n", 867 plane->state->crtc_w, plane->state->crtc_h); 868 return; 869 } 870 871 value |= (state->iova[0] >> 10) & 0x3fffff; 872 tegra_dc_writel(dc, value, DC_DISP_CURSOR_START_ADDR); 873 874 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT 875 value = (state->iova[0] >> 32) & 0x3; 876 tegra_dc_writel(dc, value, DC_DISP_CURSOR_START_ADDR_HI); 877 #endif 878 879 /* enable cursor and set blend mode */ 880 value = tegra_dc_readl(dc, DC_DISP_DISP_WIN_OPTIONS); 881 value |= CURSOR_ENABLE; 882 tegra_dc_writel(dc, value, DC_DISP_DISP_WIN_OPTIONS); 883 884 value = tegra_dc_readl(dc, DC_DISP_BLEND_CURSOR_CONTROL); 885 value &= ~CURSOR_DST_BLEND_MASK; 886 value &= ~CURSOR_SRC_BLEND_MASK; 887 value |= CURSOR_MODE_NORMAL; 888 value |= CURSOR_DST_BLEND_NEG_K1_TIMES_SRC; 889 value |= CURSOR_SRC_BLEND_K1_TIMES_SRC; 890 value |= CURSOR_ALPHA; 891 tegra_dc_writel(dc, value, DC_DISP_BLEND_CURSOR_CONTROL); 892 893 /* position the cursor */ 894 value = (plane->state->crtc_y & 0x3fff) << 16 | 895 (plane->state->crtc_x & 0x3fff); 896 tegra_dc_writel(dc, value, DC_DISP_CURSOR_POSITION); 897 } 898 899 static void tegra_cursor_atomic_disable(struct drm_plane *plane, 900 struct drm_plane_state *old_state) 901 { 902 struct tegra_dc *dc; 903 u32 value; 904 905 /* rien ne va plus */ 906 if (!old_state || !old_state->crtc) 907 return; 908 909 dc = to_tegra_dc(old_state->crtc); 910 911 value = tegra_dc_readl(dc, DC_DISP_DISP_WIN_OPTIONS); 912 value &= ~CURSOR_ENABLE; 913 tegra_dc_writel(dc, value, DC_DISP_DISP_WIN_OPTIONS); 914 } 915 916 static const struct drm_plane_helper_funcs tegra_cursor_plane_helper_funcs = { 917 .prepare_fb = tegra_plane_prepare_fb, 918 .cleanup_fb = tegra_plane_cleanup_fb, 919 .atomic_check = tegra_cursor_atomic_check, 920 .atomic_update = tegra_cursor_atomic_update, 921 .atomic_disable = tegra_cursor_atomic_disable, 922 }; 923 924 static struct drm_plane *tegra_dc_cursor_plane_create(struct drm_device *drm, 925 struct tegra_dc *dc) 926 { 927 unsigned long possible_crtcs = tegra_plane_get_possible_crtcs(drm); 928 struct tegra_plane *plane; 929 unsigned int num_formats; 930 const u32 *formats; 931 int err; 932 933 plane = kzalloc(sizeof(*plane), GFP_KERNEL); 934 if (!plane) 935 return ERR_PTR(-ENOMEM); 936 937 /* 938 * This index is kind of fake. The cursor isn't a regular plane, but 939 * its update and activation request bits in DC_CMD_STATE_CONTROL do 940 * use the same programming. Setting this fake index here allows the 941 * code in tegra_add_plane_state() to do the right thing without the 942 * need to special-casing the cursor plane. 943 */ 944 plane->index = 6; 945 plane->dc = dc; 946 947 num_formats = ARRAY_SIZE(tegra_cursor_plane_formats); 948 formats = tegra_cursor_plane_formats; 949 950 err = drm_universal_plane_init(drm, &plane->base, possible_crtcs, 951 &tegra_plane_funcs, formats, 952 num_formats, NULL, 953 DRM_PLANE_TYPE_CURSOR, NULL); 954 if (err < 0) { 955 kfree(plane); 956 return ERR_PTR(err); 957 } 958 959 drm_plane_helper_add(&plane->base, &tegra_cursor_plane_helper_funcs); 960 drm_plane_create_zpos_immutable_property(&plane->base, 255); 961 962 return &plane->base; 963 } 964 965 static const u32 tegra20_overlay_formats[] = { 966 DRM_FORMAT_ARGB4444, 967 DRM_FORMAT_ARGB1555, 968 DRM_FORMAT_RGB565, 969 DRM_FORMAT_RGBA5551, 970 DRM_FORMAT_ABGR8888, 971 DRM_FORMAT_ARGB8888, 972 /* non-native formats */ 973 DRM_FORMAT_XRGB1555, 974 DRM_FORMAT_RGBX5551, 975 DRM_FORMAT_XBGR8888, 976 DRM_FORMAT_XRGB8888, 977 /* planar formats */ 978 DRM_FORMAT_UYVY, 979 DRM_FORMAT_YUYV, 980 DRM_FORMAT_YUV420, 981 DRM_FORMAT_YUV422, 982 }; 983 984 static const u32 tegra114_overlay_formats[] = { 985 DRM_FORMAT_ARGB4444, 986 DRM_FORMAT_ARGB1555, 987 DRM_FORMAT_RGB565, 988 DRM_FORMAT_RGBA5551, 989 DRM_FORMAT_ABGR8888, 990 DRM_FORMAT_ARGB8888, 991 /* new on Tegra114 */ 992 DRM_FORMAT_ABGR4444, 993 DRM_FORMAT_ABGR1555, 994 DRM_FORMAT_BGRA5551, 995 DRM_FORMAT_XRGB1555, 996 DRM_FORMAT_RGBX5551, 997 DRM_FORMAT_XBGR1555, 998 DRM_FORMAT_BGRX5551, 999 DRM_FORMAT_BGR565, 1000 DRM_FORMAT_BGRA8888, 1001 DRM_FORMAT_RGBA8888, 1002 DRM_FORMAT_XRGB8888, 1003 DRM_FORMAT_XBGR8888, 1004 /* planar formats */ 1005 DRM_FORMAT_UYVY, 1006 DRM_FORMAT_YUYV, 1007 DRM_FORMAT_YUV420, 1008 DRM_FORMAT_YUV422, 1009 }; 1010 1011 static const u32 tegra124_overlay_formats[] = { 1012 DRM_FORMAT_ARGB4444, 1013 DRM_FORMAT_ARGB1555, 1014 DRM_FORMAT_RGB565, 1015 DRM_FORMAT_RGBA5551, 1016 DRM_FORMAT_ABGR8888, 1017 DRM_FORMAT_ARGB8888, 1018 /* new on Tegra114 */ 1019 DRM_FORMAT_ABGR4444, 1020 DRM_FORMAT_ABGR1555, 1021 DRM_FORMAT_BGRA5551, 1022 DRM_FORMAT_XRGB1555, 1023 DRM_FORMAT_RGBX5551, 1024 DRM_FORMAT_XBGR1555, 1025 DRM_FORMAT_BGRX5551, 1026 DRM_FORMAT_BGR565, 1027 DRM_FORMAT_BGRA8888, 1028 DRM_FORMAT_RGBA8888, 1029 DRM_FORMAT_XRGB8888, 1030 DRM_FORMAT_XBGR8888, 1031 /* new on Tegra124 */ 1032 DRM_FORMAT_RGBX8888, 1033 DRM_FORMAT_BGRX8888, 1034 /* planar formats */ 1035 DRM_FORMAT_UYVY, 1036 DRM_FORMAT_YUYV, 1037 DRM_FORMAT_YUV420, 1038 DRM_FORMAT_YUV422, 1039 }; 1040 1041 static struct drm_plane *tegra_dc_overlay_plane_create(struct drm_device *drm, 1042 struct tegra_dc *dc, 1043 unsigned int index, 1044 bool cursor) 1045 { 1046 unsigned long possible_crtcs = tegra_plane_get_possible_crtcs(drm); 1047 struct tegra_plane *plane; 1048 unsigned int num_formats; 1049 enum drm_plane_type type; 1050 const u32 *formats; 1051 int err; 1052 1053 plane = kzalloc(sizeof(*plane), GFP_KERNEL); 1054 if (!plane) 1055 return ERR_PTR(-ENOMEM); 1056 1057 plane->offset = 0xa00 + 0x200 * index; 1058 plane->index = index; 1059 plane->dc = dc; 1060 1061 num_formats = dc->soc->num_overlay_formats; 1062 formats = dc->soc->overlay_formats; 1063 1064 if (!cursor) 1065 type = DRM_PLANE_TYPE_OVERLAY; 1066 else 1067 type = DRM_PLANE_TYPE_CURSOR; 1068 1069 err = drm_universal_plane_init(drm, &plane->base, possible_crtcs, 1070 &tegra_plane_funcs, formats, 1071 num_formats, NULL, type, NULL); 1072 if (err < 0) { 1073 kfree(plane); 1074 return ERR_PTR(err); 1075 } 1076 1077 drm_plane_helper_add(&plane->base, &tegra_plane_helper_funcs); 1078 drm_plane_create_zpos_property(&plane->base, plane->index, 0, 255); 1079 1080 err = drm_plane_create_rotation_property(&plane->base, 1081 DRM_MODE_ROTATE_0, 1082 DRM_MODE_ROTATE_0 | 1083 DRM_MODE_REFLECT_Y); 1084 if (err < 0) 1085 dev_err(dc->dev, "failed to create rotation property: %d\n", 1086 err); 1087 1088 return &plane->base; 1089 } 1090 1091 static struct drm_plane *tegra_dc_add_shared_planes(struct drm_device *drm, 1092 struct tegra_dc *dc) 1093 { 1094 struct drm_plane *plane, *primary = NULL; 1095 unsigned int i, j; 1096 1097 for (i = 0; i < dc->soc->num_wgrps; i++) { 1098 const struct tegra_windowgroup_soc *wgrp = &dc->soc->wgrps[i]; 1099 1100 if (wgrp->dc == dc->pipe) { 1101 for (j = 0; j < wgrp->num_windows; j++) { 1102 unsigned int index = wgrp->windows[j]; 1103 1104 plane = tegra_shared_plane_create(drm, dc, 1105 wgrp->index, 1106 index); 1107 if (IS_ERR(plane)) 1108 return plane; 1109 1110 /* 1111 * Choose the first shared plane owned by this 1112 * head as the primary plane. 1113 */ 1114 if (!primary) { 1115 plane->type = DRM_PLANE_TYPE_PRIMARY; 1116 primary = plane; 1117 } 1118 } 1119 } 1120 } 1121 1122 return primary; 1123 } 1124 1125 static struct drm_plane *tegra_dc_add_planes(struct drm_device *drm, 1126 struct tegra_dc *dc) 1127 { 1128 struct drm_plane *planes[2], *primary; 1129 unsigned int planes_num; 1130 unsigned int i; 1131 int err; 1132 1133 primary = tegra_primary_plane_create(drm, dc); 1134 if (IS_ERR(primary)) 1135 return primary; 1136 1137 if (dc->soc->supports_cursor) 1138 planes_num = 2; 1139 else 1140 planes_num = 1; 1141 1142 for (i = 0; i < planes_num; i++) { 1143 planes[i] = tegra_dc_overlay_plane_create(drm, dc, 1 + i, 1144 false); 1145 if (IS_ERR(planes[i])) { 1146 err = PTR_ERR(planes[i]); 1147 1148 while (i--) 1149 tegra_plane_funcs.destroy(planes[i]); 1150 1151 tegra_plane_funcs.destroy(primary); 1152 return ERR_PTR(err); 1153 } 1154 } 1155 1156 return primary; 1157 } 1158 1159 static void tegra_dc_destroy(struct drm_crtc *crtc) 1160 { 1161 drm_crtc_cleanup(crtc); 1162 } 1163 1164 static void tegra_crtc_reset(struct drm_crtc *crtc) 1165 { 1166 struct tegra_dc_state *state = kzalloc(sizeof(*state), GFP_KERNEL); 1167 1168 if (crtc->state) 1169 tegra_crtc_atomic_destroy_state(crtc, crtc->state); 1170 1171 __drm_atomic_helper_crtc_reset(crtc, &state->base); 1172 drm_crtc_vblank_reset(crtc); 1173 } 1174 1175 static struct drm_crtc_state * 1176 tegra_crtc_atomic_duplicate_state(struct drm_crtc *crtc) 1177 { 1178 struct tegra_dc_state *state = to_dc_state(crtc->state); 1179 struct tegra_dc_state *copy; 1180 1181 copy = kmalloc(sizeof(*copy), GFP_KERNEL); 1182 if (!copy) 1183 return NULL; 1184 1185 __drm_atomic_helper_crtc_duplicate_state(crtc, ©->base); 1186 copy->clk = state->clk; 1187 copy->pclk = state->pclk; 1188 copy->div = state->div; 1189 copy->planes = state->planes; 1190 1191 return ©->base; 1192 } 1193 1194 static void tegra_crtc_atomic_destroy_state(struct drm_crtc *crtc, 1195 struct drm_crtc_state *state) 1196 { 1197 __drm_atomic_helper_crtc_destroy_state(state); 1198 kfree(state); 1199 } 1200 1201 #define DEBUGFS_REG32(_name) { .name = #_name, .offset = _name } 1202 1203 static const struct debugfs_reg32 tegra_dc_regs[] = { 1204 DEBUGFS_REG32(DC_CMD_GENERAL_INCR_SYNCPT), 1205 DEBUGFS_REG32(DC_CMD_GENERAL_INCR_SYNCPT_CNTRL), 1206 DEBUGFS_REG32(DC_CMD_GENERAL_INCR_SYNCPT_ERROR), 1207 DEBUGFS_REG32(DC_CMD_WIN_A_INCR_SYNCPT), 1208 DEBUGFS_REG32(DC_CMD_WIN_A_INCR_SYNCPT_CNTRL), 1209 DEBUGFS_REG32(DC_CMD_WIN_A_INCR_SYNCPT_ERROR), 1210 DEBUGFS_REG32(DC_CMD_WIN_B_INCR_SYNCPT), 1211 DEBUGFS_REG32(DC_CMD_WIN_B_INCR_SYNCPT_CNTRL), 1212 DEBUGFS_REG32(DC_CMD_WIN_B_INCR_SYNCPT_ERROR), 1213 DEBUGFS_REG32(DC_CMD_WIN_C_INCR_SYNCPT), 1214 DEBUGFS_REG32(DC_CMD_WIN_C_INCR_SYNCPT_CNTRL), 1215 DEBUGFS_REG32(DC_CMD_WIN_C_INCR_SYNCPT_ERROR), 1216 DEBUGFS_REG32(DC_CMD_CONT_SYNCPT_VSYNC), 1217 DEBUGFS_REG32(DC_CMD_DISPLAY_COMMAND_OPTION0), 1218 DEBUGFS_REG32(DC_CMD_DISPLAY_COMMAND), 1219 DEBUGFS_REG32(DC_CMD_SIGNAL_RAISE), 1220 DEBUGFS_REG32(DC_CMD_DISPLAY_POWER_CONTROL), 1221 DEBUGFS_REG32(DC_CMD_INT_STATUS), 1222 DEBUGFS_REG32(DC_CMD_INT_MASK), 1223 DEBUGFS_REG32(DC_CMD_INT_ENABLE), 1224 DEBUGFS_REG32(DC_CMD_INT_TYPE), 1225 DEBUGFS_REG32(DC_CMD_INT_POLARITY), 1226 DEBUGFS_REG32(DC_CMD_SIGNAL_RAISE1), 1227 DEBUGFS_REG32(DC_CMD_SIGNAL_RAISE2), 1228 DEBUGFS_REG32(DC_CMD_SIGNAL_RAISE3), 1229 DEBUGFS_REG32(DC_CMD_STATE_ACCESS), 1230 DEBUGFS_REG32(DC_CMD_STATE_CONTROL), 1231 DEBUGFS_REG32(DC_CMD_DISPLAY_WINDOW_HEADER), 1232 DEBUGFS_REG32(DC_CMD_REG_ACT_CONTROL), 1233 DEBUGFS_REG32(DC_COM_CRC_CONTROL), 1234 DEBUGFS_REG32(DC_COM_CRC_CHECKSUM), 1235 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_ENABLE(0)), 1236 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_ENABLE(1)), 1237 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_ENABLE(2)), 1238 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_ENABLE(3)), 1239 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_POLARITY(0)), 1240 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_POLARITY(1)), 1241 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_POLARITY(2)), 1242 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_POLARITY(3)), 1243 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_DATA(0)), 1244 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_DATA(1)), 1245 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_DATA(2)), 1246 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_DATA(3)), 1247 DEBUGFS_REG32(DC_COM_PIN_INPUT_ENABLE(0)), 1248 DEBUGFS_REG32(DC_COM_PIN_INPUT_ENABLE(1)), 1249 DEBUGFS_REG32(DC_COM_PIN_INPUT_ENABLE(2)), 1250 DEBUGFS_REG32(DC_COM_PIN_INPUT_ENABLE(3)), 1251 DEBUGFS_REG32(DC_COM_PIN_INPUT_DATA(0)), 1252 DEBUGFS_REG32(DC_COM_PIN_INPUT_DATA(1)), 1253 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_SELECT(0)), 1254 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_SELECT(1)), 1255 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_SELECT(2)), 1256 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_SELECT(3)), 1257 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_SELECT(4)), 1258 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_SELECT(5)), 1259 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_SELECT(6)), 1260 DEBUGFS_REG32(DC_COM_PIN_MISC_CONTROL), 1261 DEBUGFS_REG32(DC_COM_PIN_PM0_CONTROL), 1262 DEBUGFS_REG32(DC_COM_PIN_PM0_DUTY_CYCLE), 1263 DEBUGFS_REG32(DC_COM_PIN_PM1_CONTROL), 1264 DEBUGFS_REG32(DC_COM_PIN_PM1_DUTY_CYCLE), 1265 DEBUGFS_REG32(DC_COM_SPI_CONTROL), 1266 DEBUGFS_REG32(DC_COM_SPI_START_BYTE), 1267 DEBUGFS_REG32(DC_COM_HSPI_WRITE_DATA_AB), 1268 DEBUGFS_REG32(DC_COM_HSPI_WRITE_DATA_CD), 1269 DEBUGFS_REG32(DC_COM_HSPI_CS_DC), 1270 DEBUGFS_REG32(DC_COM_SCRATCH_REGISTER_A), 1271 DEBUGFS_REG32(DC_COM_SCRATCH_REGISTER_B), 1272 DEBUGFS_REG32(DC_COM_GPIO_CTRL), 1273 DEBUGFS_REG32(DC_COM_GPIO_DEBOUNCE_COUNTER), 1274 DEBUGFS_REG32(DC_COM_CRC_CHECKSUM_LATCHED), 1275 DEBUGFS_REG32(DC_DISP_DISP_SIGNAL_OPTIONS0), 1276 DEBUGFS_REG32(DC_DISP_DISP_SIGNAL_OPTIONS1), 1277 DEBUGFS_REG32(DC_DISP_DISP_WIN_OPTIONS), 1278 DEBUGFS_REG32(DC_DISP_DISP_MEM_HIGH_PRIORITY), 1279 DEBUGFS_REG32(DC_DISP_DISP_MEM_HIGH_PRIORITY_TIMER), 1280 DEBUGFS_REG32(DC_DISP_DISP_TIMING_OPTIONS), 1281 DEBUGFS_REG32(DC_DISP_REF_TO_SYNC), 1282 DEBUGFS_REG32(DC_DISP_SYNC_WIDTH), 1283 DEBUGFS_REG32(DC_DISP_BACK_PORCH), 1284 DEBUGFS_REG32(DC_DISP_ACTIVE), 1285 DEBUGFS_REG32(DC_DISP_FRONT_PORCH), 1286 DEBUGFS_REG32(DC_DISP_H_PULSE0_CONTROL), 1287 DEBUGFS_REG32(DC_DISP_H_PULSE0_POSITION_A), 1288 DEBUGFS_REG32(DC_DISP_H_PULSE0_POSITION_B), 1289 DEBUGFS_REG32(DC_DISP_H_PULSE0_POSITION_C), 1290 DEBUGFS_REG32(DC_DISP_H_PULSE0_POSITION_D), 1291 DEBUGFS_REG32(DC_DISP_H_PULSE1_CONTROL), 1292 DEBUGFS_REG32(DC_DISP_H_PULSE1_POSITION_A), 1293 DEBUGFS_REG32(DC_DISP_H_PULSE1_POSITION_B), 1294 DEBUGFS_REG32(DC_DISP_H_PULSE1_POSITION_C), 1295 DEBUGFS_REG32(DC_DISP_H_PULSE1_POSITION_D), 1296 DEBUGFS_REG32(DC_DISP_H_PULSE2_CONTROL), 1297 DEBUGFS_REG32(DC_DISP_H_PULSE2_POSITION_A), 1298 DEBUGFS_REG32(DC_DISP_H_PULSE2_POSITION_B), 1299 DEBUGFS_REG32(DC_DISP_H_PULSE2_POSITION_C), 1300 DEBUGFS_REG32(DC_DISP_H_PULSE2_POSITION_D), 1301 DEBUGFS_REG32(DC_DISP_V_PULSE0_CONTROL), 1302 DEBUGFS_REG32(DC_DISP_V_PULSE0_POSITION_A), 1303 DEBUGFS_REG32(DC_DISP_V_PULSE0_POSITION_B), 1304 DEBUGFS_REG32(DC_DISP_V_PULSE0_POSITION_C), 1305 DEBUGFS_REG32(DC_DISP_V_PULSE1_CONTROL), 1306 DEBUGFS_REG32(DC_DISP_V_PULSE1_POSITION_A), 1307 DEBUGFS_REG32(DC_DISP_V_PULSE1_POSITION_B), 1308 DEBUGFS_REG32(DC_DISP_V_PULSE1_POSITION_C), 1309 DEBUGFS_REG32(DC_DISP_V_PULSE2_CONTROL), 1310 DEBUGFS_REG32(DC_DISP_V_PULSE2_POSITION_A), 1311 DEBUGFS_REG32(DC_DISP_V_PULSE3_CONTROL), 1312 DEBUGFS_REG32(DC_DISP_V_PULSE3_POSITION_A), 1313 DEBUGFS_REG32(DC_DISP_M0_CONTROL), 1314 DEBUGFS_REG32(DC_DISP_M1_CONTROL), 1315 DEBUGFS_REG32(DC_DISP_DI_CONTROL), 1316 DEBUGFS_REG32(DC_DISP_PP_CONTROL), 1317 DEBUGFS_REG32(DC_DISP_PP_SELECT_A), 1318 DEBUGFS_REG32(DC_DISP_PP_SELECT_B), 1319 DEBUGFS_REG32(DC_DISP_PP_SELECT_C), 1320 DEBUGFS_REG32(DC_DISP_PP_SELECT_D), 1321 DEBUGFS_REG32(DC_DISP_DISP_CLOCK_CONTROL), 1322 DEBUGFS_REG32(DC_DISP_DISP_INTERFACE_CONTROL), 1323 DEBUGFS_REG32(DC_DISP_DISP_COLOR_CONTROL), 1324 DEBUGFS_REG32(DC_DISP_SHIFT_CLOCK_OPTIONS), 1325 DEBUGFS_REG32(DC_DISP_DATA_ENABLE_OPTIONS), 1326 DEBUGFS_REG32(DC_DISP_SERIAL_INTERFACE_OPTIONS), 1327 DEBUGFS_REG32(DC_DISP_LCD_SPI_OPTIONS), 1328 DEBUGFS_REG32(DC_DISP_BORDER_COLOR), 1329 DEBUGFS_REG32(DC_DISP_COLOR_KEY0_LOWER), 1330 DEBUGFS_REG32(DC_DISP_COLOR_KEY0_UPPER), 1331 DEBUGFS_REG32(DC_DISP_COLOR_KEY1_LOWER), 1332 DEBUGFS_REG32(DC_DISP_COLOR_KEY1_UPPER), 1333 DEBUGFS_REG32(DC_DISP_CURSOR_FOREGROUND), 1334 DEBUGFS_REG32(DC_DISP_CURSOR_BACKGROUND), 1335 DEBUGFS_REG32(DC_DISP_CURSOR_START_ADDR), 1336 DEBUGFS_REG32(DC_DISP_CURSOR_START_ADDR_NS), 1337 DEBUGFS_REG32(DC_DISP_CURSOR_POSITION), 1338 DEBUGFS_REG32(DC_DISP_CURSOR_POSITION_NS), 1339 DEBUGFS_REG32(DC_DISP_INIT_SEQ_CONTROL), 1340 DEBUGFS_REG32(DC_DISP_SPI_INIT_SEQ_DATA_A), 1341 DEBUGFS_REG32(DC_DISP_SPI_INIT_SEQ_DATA_B), 1342 DEBUGFS_REG32(DC_DISP_SPI_INIT_SEQ_DATA_C), 1343 DEBUGFS_REG32(DC_DISP_SPI_INIT_SEQ_DATA_D), 1344 DEBUGFS_REG32(DC_DISP_DC_MCCIF_FIFOCTRL), 1345 DEBUGFS_REG32(DC_DISP_MCCIF_DISPLAY0A_HYST), 1346 DEBUGFS_REG32(DC_DISP_MCCIF_DISPLAY0B_HYST), 1347 DEBUGFS_REG32(DC_DISP_MCCIF_DISPLAY1A_HYST), 1348 DEBUGFS_REG32(DC_DISP_MCCIF_DISPLAY1B_HYST), 1349 DEBUGFS_REG32(DC_DISP_DAC_CRT_CTRL), 1350 DEBUGFS_REG32(DC_DISP_DISP_MISC_CONTROL), 1351 DEBUGFS_REG32(DC_DISP_SD_CONTROL), 1352 DEBUGFS_REG32(DC_DISP_SD_CSC_COEFF), 1353 DEBUGFS_REG32(DC_DISP_SD_LUT(0)), 1354 DEBUGFS_REG32(DC_DISP_SD_LUT(1)), 1355 DEBUGFS_REG32(DC_DISP_SD_LUT(2)), 1356 DEBUGFS_REG32(DC_DISP_SD_LUT(3)), 1357 DEBUGFS_REG32(DC_DISP_SD_LUT(4)), 1358 DEBUGFS_REG32(DC_DISP_SD_LUT(5)), 1359 DEBUGFS_REG32(DC_DISP_SD_LUT(6)), 1360 DEBUGFS_REG32(DC_DISP_SD_LUT(7)), 1361 DEBUGFS_REG32(DC_DISP_SD_LUT(8)), 1362 DEBUGFS_REG32(DC_DISP_SD_FLICKER_CONTROL), 1363 DEBUGFS_REG32(DC_DISP_DC_PIXEL_COUNT), 1364 DEBUGFS_REG32(DC_DISP_SD_HISTOGRAM(0)), 1365 DEBUGFS_REG32(DC_DISP_SD_HISTOGRAM(1)), 1366 DEBUGFS_REG32(DC_DISP_SD_HISTOGRAM(2)), 1367 DEBUGFS_REG32(DC_DISP_SD_HISTOGRAM(3)), 1368 DEBUGFS_REG32(DC_DISP_SD_HISTOGRAM(4)), 1369 DEBUGFS_REG32(DC_DISP_SD_HISTOGRAM(5)), 1370 DEBUGFS_REG32(DC_DISP_SD_HISTOGRAM(6)), 1371 DEBUGFS_REG32(DC_DISP_SD_HISTOGRAM(7)), 1372 DEBUGFS_REG32(DC_DISP_SD_BL_TF(0)), 1373 DEBUGFS_REG32(DC_DISP_SD_BL_TF(1)), 1374 DEBUGFS_REG32(DC_DISP_SD_BL_TF(2)), 1375 DEBUGFS_REG32(DC_DISP_SD_BL_TF(3)), 1376 DEBUGFS_REG32(DC_DISP_SD_BL_CONTROL), 1377 DEBUGFS_REG32(DC_DISP_SD_HW_K_VALUES), 1378 DEBUGFS_REG32(DC_DISP_SD_MAN_K_VALUES), 1379 DEBUGFS_REG32(DC_DISP_CURSOR_START_ADDR_HI), 1380 DEBUGFS_REG32(DC_DISP_BLEND_CURSOR_CONTROL), 1381 DEBUGFS_REG32(DC_WIN_WIN_OPTIONS), 1382 DEBUGFS_REG32(DC_WIN_BYTE_SWAP), 1383 DEBUGFS_REG32(DC_WIN_BUFFER_CONTROL), 1384 DEBUGFS_REG32(DC_WIN_COLOR_DEPTH), 1385 DEBUGFS_REG32(DC_WIN_POSITION), 1386 DEBUGFS_REG32(DC_WIN_SIZE), 1387 DEBUGFS_REG32(DC_WIN_PRESCALED_SIZE), 1388 DEBUGFS_REG32(DC_WIN_H_INITIAL_DDA), 1389 DEBUGFS_REG32(DC_WIN_V_INITIAL_DDA), 1390 DEBUGFS_REG32(DC_WIN_DDA_INC), 1391 DEBUGFS_REG32(DC_WIN_LINE_STRIDE), 1392 DEBUGFS_REG32(DC_WIN_BUF_STRIDE), 1393 DEBUGFS_REG32(DC_WIN_UV_BUF_STRIDE), 1394 DEBUGFS_REG32(DC_WIN_BUFFER_ADDR_MODE), 1395 DEBUGFS_REG32(DC_WIN_DV_CONTROL), 1396 DEBUGFS_REG32(DC_WIN_BLEND_NOKEY), 1397 DEBUGFS_REG32(DC_WIN_BLEND_1WIN), 1398 DEBUGFS_REG32(DC_WIN_BLEND_2WIN_X), 1399 DEBUGFS_REG32(DC_WIN_BLEND_2WIN_Y), 1400 DEBUGFS_REG32(DC_WIN_BLEND_3WIN_XY), 1401 DEBUGFS_REG32(DC_WIN_HP_FETCH_CONTROL), 1402 DEBUGFS_REG32(DC_WINBUF_START_ADDR), 1403 DEBUGFS_REG32(DC_WINBUF_START_ADDR_NS), 1404 DEBUGFS_REG32(DC_WINBUF_START_ADDR_U), 1405 DEBUGFS_REG32(DC_WINBUF_START_ADDR_U_NS), 1406 DEBUGFS_REG32(DC_WINBUF_START_ADDR_V), 1407 DEBUGFS_REG32(DC_WINBUF_START_ADDR_V_NS), 1408 DEBUGFS_REG32(DC_WINBUF_ADDR_H_OFFSET), 1409 DEBUGFS_REG32(DC_WINBUF_ADDR_H_OFFSET_NS), 1410 DEBUGFS_REG32(DC_WINBUF_ADDR_V_OFFSET), 1411 DEBUGFS_REG32(DC_WINBUF_ADDR_V_OFFSET_NS), 1412 DEBUGFS_REG32(DC_WINBUF_UFLOW_STATUS), 1413 DEBUGFS_REG32(DC_WINBUF_AD_UFLOW_STATUS), 1414 DEBUGFS_REG32(DC_WINBUF_BD_UFLOW_STATUS), 1415 DEBUGFS_REG32(DC_WINBUF_CD_UFLOW_STATUS), 1416 }; 1417 1418 static int tegra_dc_show_regs(struct seq_file *s, void *data) 1419 { 1420 struct drm_info_node *node = s->private; 1421 struct tegra_dc *dc = node->info_ent->data; 1422 unsigned int i; 1423 int err = 0; 1424 1425 drm_modeset_lock(&dc->base.mutex, NULL); 1426 1427 if (!dc->base.state->active) { 1428 err = -EBUSY; 1429 goto unlock; 1430 } 1431 1432 for (i = 0; i < ARRAY_SIZE(tegra_dc_regs); i++) { 1433 unsigned int offset = tegra_dc_regs[i].offset; 1434 1435 seq_printf(s, "%-40s %#05x %08x\n", tegra_dc_regs[i].name, 1436 offset, tegra_dc_readl(dc, offset)); 1437 } 1438 1439 unlock: 1440 drm_modeset_unlock(&dc->base.mutex); 1441 return err; 1442 } 1443 1444 static int tegra_dc_show_crc(struct seq_file *s, void *data) 1445 { 1446 struct drm_info_node *node = s->private; 1447 struct tegra_dc *dc = node->info_ent->data; 1448 int err = 0; 1449 u32 value; 1450 1451 drm_modeset_lock(&dc->base.mutex, NULL); 1452 1453 if (!dc->base.state->active) { 1454 err = -EBUSY; 1455 goto unlock; 1456 } 1457 1458 value = DC_COM_CRC_CONTROL_ACTIVE_DATA | DC_COM_CRC_CONTROL_ENABLE; 1459 tegra_dc_writel(dc, value, DC_COM_CRC_CONTROL); 1460 tegra_dc_commit(dc); 1461 1462 drm_crtc_wait_one_vblank(&dc->base); 1463 drm_crtc_wait_one_vblank(&dc->base); 1464 1465 value = tegra_dc_readl(dc, DC_COM_CRC_CHECKSUM); 1466 seq_printf(s, "%08x\n", value); 1467 1468 tegra_dc_writel(dc, 0, DC_COM_CRC_CONTROL); 1469 1470 unlock: 1471 drm_modeset_unlock(&dc->base.mutex); 1472 return err; 1473 } 1474 1475 static int tegra_dc_show_stats(struct seq_file *s, void *data) 1476 { 1477 struct drm_info_node *node = s->private; 1478 struct tegra_dc *dc = node->info_ent->data; 1479 1480 seq_printf(s, "frames: %lu\n", dc->stats.frames); 1481 seq_printf(s, "vblank: %lu\n", dc->stats.vblank); 1482 seq_printf(s, "underflow: %lu\n", dc->stats.underflow); 1483 seq_printf(s, "overflow: %lu\n", dc->stats.overflow); 1484 1485 return 0; 1486 } 1487 1488 static struct drm_info_list debugfs_files[] = { 1489 { "regs", tegra_dc_show_regs, 0, NULL }, 1490 { "crc", tegra_dc_show_crc, 0, NULL }, 1491 { "stats", tegra_dc_show_stats, 0, NULL }, 1492 }; 1493 1494 static int tegra_dc_late_register(struct drm_crtc *crtc) 1495 { 1496 unsigned int i, count = ARRAY_SIZE(debugfs_files); 1497 struct drm_minor *minor = crtc->dev->primary; 1498 struct dentry *root; 1499 struct tegra_dc *dc = to_tegra_dc(crtc); 1500 1501 #ifdef CONFIG_DEBUG_FS 1502 root = crtc->debugfs_entry; 1503 #else 1504 root = NULL; 1505 #endif 1506 1507 dc->debugfs_files = kmemdup(debugfs_files, sizeof(debugfs_files), 1508 GFP_KERNEL); 1509 if (!dc->debugfs_files) 1510 return -ENOMEM; 1511 1512 for (i = 0; i < count; i++) 1513 dc->debugfs_files[i].data = dc; 1514 1515 drm_debugfs_create_files(dc->debugfs_files, count, root, minor); 1516 1517 return 0; 1518 } 1519 1520 static void tegra_dc_early_unregister(struct drm_crtc *crtc) 1521 { 1522 unsigned int count = ARRAY_SIZE(debugfs_files); 1523 struct drm_minor *minor = crtc->dev->primary; 1524 struct tegra_dc *dc = to_tegra_dc(crtc); 1525 1526 drm_debugfs_remove_files(dc->debugfs_files, count, minor); 1527 kfree(dc->debugfs_files); 1528 dc->debugfs_files = NULL; 1529 } 1530 1531 static u32 tegra_dc_get_vblank_counter(struct drm_crtc *crtc) 1532 { 1533 struct tegra_dc *dc = to_tegra_dc(crtc); 1534 1535 /* XXX vblank syncpoints don't work with nvdisplay yet */ 1536 if (dc->syncpt && !dc->soc->has_nvdisplay) 1537 return host1x_syncpt_read(dc->syncpt); 1538 1539 /* fallback to software emulated VBLANK counter */ 1540 return (u32)drm_crtc_vblank_count(&dc->base); 1541 } 1542 1543 static int tegra_dc_enable_vblank(struct drm_crtc *crtc) 1544 { 1545 struct tegra_dc *dc = to_tegra_dc(crtc); 1546 u32 value; 1547 1548 value = tegra_dc_readl(dc, DC_CMD_INT_MASK); 1549 value |= VBLANK_INT; 1550 tegra_dc_writel(dc, value, DC_CMD_INT_MASK); 1551 1552 return 0; 1553 } 1554 1555 static void tegra_dc_disable_vblank(struct drm_crtc *crtc) 1556 { 1557 struct tegra_dc *dc = to_tegra_dc(crtc); 1558 u32 value; 1559 1560 value = tegra_dc_readl(dc, DC_CMD_INT_MASK); 1561 value &= ~VBLANK_INT; 1562 tegra_dc_writel(dc, value, DC_CMD_INT_MASK); 1563 } 1564 1565 static const struct drm_crtc_funcs tegra_crtc_funcs = { 1566 .page_flip = drm_atomic_helper_page_flip, 1567 .set_config = drm_atomic_helper_set_config, 1568 .destroy = tegra_dc_destroy, 1569 .reset = tegra_crtc_reset, 1570 .atomic_duplicate_state = tegra_crtc_atomic_duplicate_state, 1571 .atomic_destroy_state = tegra_crtc_atomic_destroy_state, 1572 .late_register = tegra_dc_late_register, 1573 .early_unregister = tegra_dc_early_unregister, 1574 .get_vblank_counter = tegra_dc_get_vblank_counter, 1575 .enable_vblank = tegra_dc_enable_vblank, 1576 .disable_vblank = tegra_dc_disable_vblank, 1577 }; 1578 1579 static int tegra_dc_set_timings(struct tegra_dc *dc, 1580 struct drm_display_mode *mode) 1581 { 1582 unsigned int h_ref_to_sync = 1; 1583 unsigned int v_ref_to_sync = 1; 1584 unsigned long value; 1585 1586 if (!dc->soc->has_nvdisplay) { 1587 tegra_dc_writel(dc, 0x0, DC_DISP_DISP_TIMING_OPTIONS); 1588 1589 value = (v_ref_to_sync << 16) | h_ref_to_sync; 1590 tegra_dc_writel(dc, value, DC_DISP_REF_TO_SYNC); 1591 } 1592 1593 value = ((mode->vsync_end - mode->vsync_start) << 16) | 1594 ((mode->hsync_end - mode->hsync_start) << 0); 1595 tegra_dc_writel(dc, value, DC_DISP_SYNC_WIDTH); 1596 1597 value = ((mode->vtotal - mode->vsync_end) << 16) | 1598 ((mode->htotal - mode->hsync_end) << 0); 1599 tegra_dc_writel(dc, value, DC_DISP_BACK_PORCH); 1600 1601 value = ((mode->vsync_start - mode->vdisplay) << 16) | 1602 ((mode->hsync_start - mode->hdisplay) << 0); 1603 tegra_dc_writel(dc, value, DC_DISP_FRONT_PORCH); 1604 1605 value = (mode->vdisplay << 16) | mode->hdisplay; 1606 tegra_dc_writel(dc, value, DC_DISP_ACTIVE); 1607 1608 return 0; 1609 } 1610 1611 /** 1612 * tegra_dc_state_setup_clock - check clock settings and store them in atomic 1613 * state 1614 * @dc: display controller 1615 * @crtc_state: CRTC atomic state 1616 * @clk: parent clock for display controller 1617 * @pclk: pixel clock 1618 * @div: shift clock divider 1619 * 1620 * Returns: 1621 * 0 on success or a negative error-code on failure. 1622 */ 1623 int tegra_dc_state_setup_clock(struct tegra_dc *dc, 1624 struct drm_crtc_state *crtc_state, 1625 struct clk *clk, unsigned long pclk, 1626 unsigned int div) 1627 { 1628 struct tegra_dc_state *state = to_dc_state(crtc_state); 1629 1630 if (!clk_has_parent(dc->clk, clk)) 1631 return -EINVAL; 1632 1633 state->clk = clk; 1634 state->pclk = pclk; 1635 state->div = div; 1636 1637 return 0; 1638 } 1639 1640 static void tegra_dc_commit_state(struct tegra_dc *dc, 1641 struct tegra_dc_state *state) 1642 { 1643 u32 value; 1644 int err; 1645 1646 err = clk_set_parent(dc->clk, state->clk); 1647 if (err < 0) 1648 dev_err(dc->dev, "failed to set parent clock: %d\n", err); 1649 1650 /* 1651 * Outputs may not want to change the parent clock rate. This is only 1652 * relevant to Tegra20 where only a single display PLL is available. 1653 * Since that PLL would typically be used for HDMI, an internal LVDS 1654 * panel would need to be driven by some other clock such as PLL_P 1655 * which is shared with other peripherals. Changing the clock rate 1656 * should therefore be avoided. 1657 */ 1658 if (state->pclk > 0) { 1659 err = clk_set_rate(state->clk, state->pclk); 1660 if (err < 0) 1661 dev_err(dc->dev, 1662 "failed to set clock rate to %lu Hz\n", 1663 state->pclk); 1664 } 1665 1666 DRM_DEBUG_KMS("rate: %lu, div: %u\n", clk_get_rate(dc->clk), 1667 state->div); 1668 DRM_DEBUG_KMS("pclk: %lu\n", state->pclk); 1669 1670 if (!dc->soc->has_nvdisplay) { 1671 value = SHIFT_CLK_DIVIDER(state->div) | PIXEL_CLK_DIVIDER_PCD1; 1672 tegra_dc_writel(dc, value, DC_DISP_DISP_CLOCK_CONTROL); 1673 } 1674 1675 err = clk_set_rate(dc->clk, state->pclk); 1676 if (err < 0) 1677 dev_err(dc->dev, "failed to set clock %pC to %lu Hz: %d\n", 1678 dc->clk, state->pclk, err); 1679 } 1680 1681 static void tegra_dc_stop(struct tegra_dc *dc) 1682 { 1683 u32 value; 1684 1685 /* stop the display controller */ 1686 value = tegra_dc_readl(dc, DC_CMD_DISPLAY_COMMAND); 1687 value &= ~DISP_CTRL_MODE_MASK; 1688 tegra_dc_writel(dc, value, DC_CMD_DISPLAY_COMMAND); 1689 1690 tegra_dc_commit(dc); 1691 } 1692 1693 static bool tegra_dc_idle(struct tegra_dc *dc) 1694 { 1695 u32 value; 1696 1697 value = tegra_dc_readl_active(dc, DC_CMD_DISPLAY_COMMAND); 1698 1699 return (value & DISP_CTRL_MODE_MASK) == 0; 1700 } 1701 1702 static int tegra_dc_wait_idle(struct tegra_dc *dc, unsigned long timeout) 1703 { 1704 timeout = jiffies + msecs_to_jiffies(timeout); 1705 1706 while (time_before(jiffies, timeout)) { 1707 if (tegra_dc_idle(dc)) 1708 return 0; 1709 1710 usleep_range(1000, 2000); 1711 } 1712 1713 dev_dbg(dc->dev, "timeout waiting for DC to become idle\n"); 1714 return -ETIMEDOUT; 1715 } 1716 1717 static void tegra_crtc_atomic_disable(struct drm_crtc *crtc, 1718 struct drm_crtc_state *old_state) 1719 { 1720 struct tegra_dc *dc = to_tegra_dc(crtc); 1721 u32 value; 1722 int err; 1723 1724 if (!tegra_dc_idle(dc)) { 1725 tegra_dc_stop(dc); 1726 1727 /* 1728 * Ignore the return value, there isn't anything useful to do 1729 * in case this fails. 1730 */ 1731 tegra_dc_wait_idle(dc, 100); 1732 } 1733 1734 /* 1735 * This should really be part of the RGB encoder driver, but clearing 1736 * these bits has the side-effect of stopping the display controller. 1737 * When that happens no VBLANK interrupts will be raised. At the same 1738 * time the encoder is disabled before the display controller, so the 1739 * above code is always going to timeout waiting for the controller 1740 * to go idle. 1741 * 1742 * Given the close coupling between the RGB encoder and the display 1743 * controller doing it here is still kind of okay. None of the other 1744 * encoder drivers require these bits to be cleared. 1745 * 1746 * XXX: Perhaps given that the display controller is switched off at 1747 * this point anyway maybe clearing these bits isn't even useful for 1748 * the RGB encoder? 1749 */ 1750 if (dc->rgb) { 1751 value = tegra_dc_readl(dc, DC_CMD_DISPLAY_POWER_CONTROL); 1752 value &= ~(PW0_ENABLE | PW1_ENABLE | PW2_ENABLE | PW3_ENABLE | 1753 PW4_ENABLE | PM0_ENABLE | PM1_ENABLE); 1754 tegra_dc_writel(dc, value, DC_CMD_DISPLAY_POWER_CONTROL); 1755 } 1756 1757 tegra_dc_stats_reset(&dc->stats); 1758 drm_crtc_vblank_off(crtc); 1759 1760 spin_lock_irq(&crtc->dev->event_lock); 1761 1762 if (crtc->state->event) { 1763 drm_crtc_send_vblank_event(crtc, crtc->state->event); 1764 crtc->state->event = NULL; 1765 } 1766 1767 spin_unlock_irq(&crtc->dev->event_lock); 1768 1769 err = host1x_client_suspend(&dc->client); 1770 if (err < 0) 1771 dev_err(dc->dev, "failed to suspend: %d\n", err); 1772 } 1773 1774 static void tegra_crtc_atomic_enable(struct drm_crtc *crtc, 1775 struct drm_crtc_state *old_state) 1776 { 1777 struct drm_display_mode *mode = &crtc->state->adjusted_mode; 1778 struct tegra_dc_state *state = to_dc_state(crtc->state); 1779 struct tegra_dc *dc = to_tegra_dc(crtc); 1780 u32 value; 1781 int err; 1782 1783 err = host1x_client_resume(&dc->client); 1784 if (err < 0) { 1785 dev_err(dc->dev, "failed to resume: %d\n", err); 1786 return; 1787 } 1788 1789 /* initialize display controller */ 1790 if (dc->syncpt) { 1791 u32 syncpt = host1x_syncpt_id(dc->syncpt), enable; 1792 1793 if (dc->soc->has_nvdisplay) 1794 enable = 1 << 31; 1795 else 1796 enable = 1 << 8; 1797 1798 value = SYNCPT_CNTRL_NO_STALL; 1799 tegra_dc_writel(dc, value, DC_CMD_GENERAL_INCR_SYNCPT_CNTRL); 1800 1801 value = enable | syncpt; 1802 tegra_dc_writel(dc, value, DC_CMD_CONT_SYNCPT_VSYNC); 1803 } 1804 1805 if (dc->soc->has_nvdisplay) { 1806 value = DSC_TO_UF_INT | DSC_BBUF_UF_INT | DSC_RBUF_UF_INT | 1807 DSC_OBUF_UF_INT; 1808 tegra_dc_writel(dc, value, DC_CMD_INT_TYPE); 1809 1810 value = DSC_TO_UF_INT | DSC_BBUF_UF_INT | DSC_RBUF_UF_INT | 1811 DSC_OBUF_UF_INT | SD3_BUCKET_WALK_DONE_INT | 1812 HEAD_UF_INT | MSF_INT | REG_TMOUT_INT | 1813 REGION_CRC_INT | V_PULSE2_INT | V_PULSE3_INT | 1814 VBLANK_INT | FRAME_END_INT; 1815 tegra_dc_writel(dc, value, DC_CMD_INT_POLARITY); 1816 1817 value = SD3_BUCKET_WALK_DONE_INT | HEAD_UF_INT | VBLANK_INT | 1818 FRAME_END_INT; 1819 tegra_dc_writel(dc, value, DC_CMD_INT_ENABLE); 1820 1821 value = HEAD_UF_INT | REG_TMOUT_INT | FRAME_END_INT; 1822 tegra_dc_writel(dc, value, DC_CMD_INT_MASK); 1823 1824 tegra_dc_writel(dc, READ_MUX, DC_CMD_STATE_ACCESS); 1825 } else { 1826 value = WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT | 1827 WIN_A_OF_INT | WIN_B_OF_INT | WIN_C_OF_INT; 1828 tegra_dc_writel(dc, value, DC_CMD_INT_TYPE); 1829 1830 value = WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT | 1831 WIN_A_OF_INT | WIN_B_OF_INT | WIN_C_OF_INT; 1832 tegra_dc_writel(dc, value, DC_CMD_INT_POLARITY); 1833 1834 /* initialize timer */ 1835 value = CURSOR_THRESHOLD(0) | WINDOW_A_THRESHOLD(0x20) | 1836 WINDOW_B_THRESHOLD(0x20) | WINDOW_C_THRESHOLD(0x20); 1837 tegra_dc_writel(dc, value, DC_DISP_DISP_MEM_HIGH_PRIORITY); 1838 1839 value = CURSOR_THRESHOLD(0) | WINDOW_A_THRESHOLD(1) | 1840 WINDOW_B_THRESHOLD(1) | WINDOW_C_THRESHOLD(1); 1841 tegra_dc_writel(dc, value, DC_DISP_DISP_MEM_HIGH_PRIORITY_TIMER); 1842 1843 value = VBLANK_INT | WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT | 1844 WIN_A_OF_INT | WIN_B_OF_INT | WIN_C_OF_INT; 1845 tegra_dc_writel(dc, value, DC_CMD_INT_ENABLE); 1846 1847 value = WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT | 1848 WIN_A_OF_INT | WIN_B_OF_INT | WIN_C_OF_INT; 1849 tegra_dc_writel(dc, value, DC_CMD_INT_MASK); 1850 } 1851 1852 if (dc->soc->supports_background_color) 1853 tegra_dc_writel(dc, 0, DC_DISP_BLEND_BACKGROUND_COLOR); 1854 else 1855 tegra_dc_writel(dc, 0, DC_DISP_BORDER_COLOR); 1856 1857 /* apply PLL and pixel clock changes */ 1858 tegra_dc_commit_state(dc, state); 1859 1860 /* program display mode */ 1861 tegra_dc_set_timings(dc, mode); 1862 1863 /* interlacing isn't supported yet, so disable it */ 1864 if (dc->soc->supports_interlacing) { 1865 value = tegra_dc_readl(dc, DC_DISP_INTERLACE_CONTROL); 1866 value &= ~INTERLACE_ENABLE; 1867 tegra_dc_writel(dc, value, DC_DISP_INTERLACE_CONTROL); 1868 } 1869 1870 value = tegra_dc_readl(dc, DC_CMD_DISPLAY_COMMAND); 1871 value &= ~DISP_CTRL_MODE_MASK; 1872 value |= DISP_CTRL_MODE_C_DISPLAY; 1873 tegra_dc_writel(dc, value, DC_CMD_DISPLAY_COMMAND); 1874 1875 if (!dc->soc->has_nvdisplay) { 1876 value = tegra_dc_readl(dc, DC_CMD_DISPLAY_POWER_CONTROL); 1877 value |= PW0_ENABLE | PW1_ENABLE | PW2_ENABLE | PW3_ENABLE | 1878 PW4_ENABLE | PM0_ENABLE | PM1_ENABLE; 1879 tegra_dc_writel(dc, value, DC_CMD_DISPLAY_POWER_CONTROL); 1880 } 1881 1882 /* enable underflow reporting and display red for missing pixels */ 1883 if (dc->soc->has_nvdisplay) { 1884 value = UNDERFLOW_MODE_RED | UNDERFLOW_REPORT_ENABLE; 1885 tegra_dc_writel(dc, value, DC_COM_RG_UNDERFLOW); 1886 } 1887 1888 tegra_dc_commit(dc); 1889 1890 drm_crtc_vblank_on(crtc); 1891 } 1892 1893 static void tegra_crtc_atomic_begin(struct drm_crtc *crtc, 1894 struct drm_crtc_state *old_crtc_state) 1895 { 1896 unsigned long flags; 1897 1898 if (crtc->state->event) { 1899 spin_lock_irqsave(&crtc->dev->event_lock, flags); 1900 1901 if (drm_crtc_vblank_get(crtc) != 0) 1902 drm_crtc_send_vblank_event(crtc, crtc->state->event); 1903 else 1904 drm_crtc_arm_vblank_event(crtc, crtc->state->event); 1905 1906 spin_unlock_irqrestore(&crtc->dev->event_lock, flags); 1907 1908 crtc->state->event = NULL; 1909 } 1910 } 1911 1912 static void tegra_crtc_atomic_flush(struct drm_crtc *crtc, 1913 struct drm_crtc_state *old_crtc_state) 1914 { 1915 struct tegra_dc_state *state = to_dc_state(crtc->state); 1916 struct tegra_dc *dc = to_tegra_dc(crtc); 1917 u32 value; 1918 1919 value = state->planes << 8 | GENERAL_UPDATE; 1920 tegra_dc_writel(dc, value, DC_CMD_STATE_CONTROL); 1921 value = tegra_dc_readl(dc, DC_CMD_STATE_CONTROL); 1922 1923 value = state->planes | GENERAL_ACT_REQ; 1924 tegra_dc_writel(dc, value, DC_CMD_STATE_CONTROL); 1925 value = tegra_dc_readl(dc, DC_CMD_STATE_CONTROL); 1926 } 1927 1928 static const struct drm_crtc_helper_funcs tegra_crtc_helper_funcs = { 1929 .atomic_begin = tegra_crtc_atomic_begin, 1930 .atomic_flush = tegra_crtc_atomic_flush, 1931 .atomic_enable = tegra_crtc_atomic_enable, 1932 .atomic_disable = tegra_crtc_atomic_disable, 1933 }; 1934 1935 static irqreturn_t tegra_dc_irq(int irq, void *data) 1936 { 1937 struct tegra_dc *dc = data; 1938 unsigned long status; 1939 1940 status = tegra_dc_readl(dc, DC_CMD_INT_STATUS); 1941 tegra_dc_writel(dc, status, DC_CMD_INT_STATUS); 1942 1943 if (status & FRAME_END_INT) { 1944 /* 1945 dev_dbg(dc->dev, "%s(): frame end\n", __func__); 1946 */ 1947 dc->stats.frames++; 1948 } 1949 1950 if (status & VBLANK_INT) { 1951 /* 1952 dev_dbg(dc->dev, "%s(): vertical blank\n", __func__); 1953 */ 1954 drm_crtc_handle_vblank(&dc->base); 1955 dc->stats.vblank++; 1956 } 1957 1958 if (status & (WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT)) { 1959 /* 1960 dev_dbg(dc->dev, "%s(): underflow\n", __func__); 1961 */ 1962 dc->stats.underflow++; 1963 } 1964 1965 if (status & (WIN_A_OF_INT | WIN_B_OF_INT | WIN_C_OF_INT)) { 1966 /* 1967 dev_dbg(dc->dev, "%s(): overflow\n", __func__); 1968 */ 1969 dc->stats.overflow++; 1970 } 1971 1972 if (status & HEAD_UF_INT) { 1973 dev_dbg_ratelimited(dc->dev, "%s(): head underflow\n", __func__); 1974 dc->stats.underflow++; 1975 } 1976 1977 return IRQ_HANDLED; 1978 } 1979 1980 static bool tegra_dc_has_window_groups(struct tegra_dc *dc) 1981 { 1982 unsigned int i; 1983 1984 if (!dc->soc->wgrps) 1985 return true; 1986 1987 for (i = 0; i < dc->soc->num_wgrps; i++) { 1988 const struct tegra_windowgroup_soc *wgrp = &dc->soc->wgrps[i]; 1989 1990 if (wgrp->dc == dc->pipe && wgrp->num_windows > 0) 1991 return true; 1992 } 1993 1994 return false; 1995 } 1996 1997 static int tegra_dc_init(struct host1x_client *client) 1998 { 1999 struct drm_device *drm = dev_get_drvdata(client->host); 2000 unsigned long flags = HOST1X_SYNCPT_CLIENT_MANAGED; 2001 struct tegra_dc *dc = host1x_client_to_dc(client); 2002 struct tegra_drm *tegra = drm->dev_private; 2003 struct drm_plane *primary = NULL; 2004 struct drm_plane *cursor = NULL; 2005 int err; 2006 2007 /* 2008 * XXX do not register DCs with no window groups because we cannot 2009 * assign a primary plane to them, which in turn will cause KMS to 2010 * crash. 2011 */ 2012 if (!tegra_dc_has_window_groups(dc)) 2013 return 0; 2014 2015 /* 2016 * Set the display hub as the host1x client parent for the display 2017 * controller. This is needed for the runtime reference counting that 2018 * ensures the display hub is always powered when any of the display 2019 * controllers are. 2020 */ 2021 if (dc->soc->has_nvdisplay) 2022 client->parent = &tegra->hub->client; 2023 2024 dc->syncpt = host1x_syncpt_request(client, flags); 2025 if (!dc->syncpt) 2026 dev_warn(dc->dev, "failed to allocate syncpoint\n"); 2027 2028 err = host1x_client_iommu_attach(client); 2029 if (err < 0 && err != -ENODEV) { 2030 dev_err(client->dev, "failed to attach to domain: %d\n", err); 2031 return err; 2032 } 2033 2034 if (dc->soc->wgrps) 2035 primary = tegra_dc_add_shared_planes(drm, dc); 2036 else 2037 primary = tegra_dc_add_planes(drm, dc); 2038 2039 if (IS_ERR(primary)) { 2040 err = PTR_ERR(primary); 2041 goto cleanup; 2042 } 2043 2044 if (dc->soc->supports_cursor) { 2045 cursor = tegra_dc_cursor_plane_create(drm, dc); 2046 if (IS_ERR(cursor)) { 2047 err = PTR_ERR(cursor); 2048 goto cleanup; 2049 } 2050 } else { 2051 /* dedicate one overlay to mouse cursor */ 2052 cursor = tegra_dc_overlay_plane_create(drm, dc, 2, true); 2053 if (IS_ERR(cursor)) { 2054 err = PTR_ERR(cursor); 2055 goto cleanup; 2056 } 2057 } 2058 2059 err = drm_crtc_init_with_planes(drm, &dc->base, primary, cursor, 2060 &tegra_crtc_funcs, NULL); 2061 if (err < 0) 2062 goto cleanup; 2063 2064 drm_crtc_helper_add(&dc->base, &tegra_crtc_helper_funcs); 2065 2066 /* 2067 * Keep track of the minimum pitch alignment across all display 2068 * controllers. 2069 */ 2070 if (dc->soc->pitch_align > tegra->pitch_align) 2071 tegra->pitch_align = dc->soc->pitch_align; 2072 2073 err = tegra_dc_rgb_init(drm, dc); 2074 if (err < 0 && err != -ENODEV) { 2075 dev_err(dc->dev, "failed to initialize RGB output: %d\n", err); 2076 goto cleanup; 2077 } 2078 2079 err = devm_request_irq(dc->dev, dc->irq, tegra_dc_irq, 0, 2080 dev_name(dc->dev), dc); 2081 if (err < 0) { 2082 dev_err(dc->dev, "failed to request IRQ#%u: %d\n", dc->irq, 2083 err); 2084 goto cleanup; 2085 } 2086 2087 /* 2088 * Inherit the DMA parameters (such as maximum segment size) from the 2089 * parent host1x device. 2090 */ 2091 client->dev->dma_parms = client->host->dma_parms; 2092 2093 return 0; 2094 2095 cleanup: 2096 if (!IS_ERR_OR_NULL(cursor)) 2097 drm_plane_cleanup(cursor); 2098 2099 if (!IS_ERR(primary)) 2100 drm_plane_cleanup(primary); 2101 2102 host1x_client_iommu_detach(client); 2103 host1x_syncpt_free(dc->syncpt); 2104 2105 return err; 2106 } 2107 2108 static int tegra_dc_exit(struct host1x_client *client) 2109 { 2110 struct tegra_dc *dc = host1x_client_to_dc(client); 2111 int err; 2112 2113 if (!tegra_dc_has_window_groups(dc)) 2114 return 0; 2115 2116 /* avoid a dangling pointer just in case this disappears */ 2117 client->dev->dma_parms = NULL; 2118 2119 devm_free_irq(dc->dev, dc->irq, dc); 2120 2121 err = tegra_dc_rgb_exit(dc); 2122 if (err) { 2123 dev_err(dc->dev, "failed to shutdown RGB output: %d\n", err); 2124 return err; 2125 } 2126 2127 host1x_client_iommu_detach(client); 2128 host1x_syncpt_free(dc->syncpt); 2129 2130 return 0; 2131 } 2132 2133 static int tegra_dc_runtime_suspend(struct host1x_client *client) 2134 { 2135 struct tegra_dc *dc = host1x_client_to_dc(client); 2136 struct device *dev = client->dev; 2137 int err; 2138 2139 err = reset_control_assert(dc->rst); 2140 if (err < 0) { 2141 dev_err(dev, "failed to assert reset: %d\n", err); 2142 return err; 2143 } 2144 2145 if (dc->soc->has_powergate) 2146 tegra_powergate_power_off(dc->powergate); 2147 2148 clk_disable_unprepare(dc->clk); 2149 pm_runtime_put_sync(dev); 2150 2151 return 0; 2152 } 2153 2154 static int tegra_dc_runtime_resume(struct host1x_client *client) 2155 { 2156 struct tegra_dc *dc = host1x_client_to_dc(client); 2157 struct device *dev = client->dev; 2158 int err; 2159 2160 err = pm_runtime_get_sync(dev); 2161 if (err < 0) { 2162 dev_err(dev, "failed to get runtime PM: %d\n", err); 2163 return err; 2164 } 2165 2166 if (dc->soc->has_powergate) { 2167 err = tegra_powergate_sequence_power_up(dc->powergate, dc->clk, 2168 dc->rst); 2169 if (err < 0) { 2170 dev_err(dev, "failed to power partition: %d\n", err); 2171 goto put_rpm; 2172 } 2173 } else { 2174 err = clk_prepare_enable(dc->clk); 2175 if (err < 0) { 2176 dev_err(dev, "failed to enable clock: %d\n", err); 2177 goto put_rpm; 2178 } 2179 2180 err = reset_control_deassert(dc->rst); 2181 if (err < 0) { 2182 dev_err(dev, "failed to deassert reset: %d\n", err); 2183 goto disable_clk; 2184 } 2185 } 2186 2187 return 0; 2188 2189 disable_clk: 2190 clk_disable_unprepare(dc->clk); 2191 put_rpm: 2192 pm_runtime_put_sync(dev); 2193 return err; 2194 } 2195 2196 static const struct host1x_client_ops dc_client_ops = { 2197 .init = tegra_dc_init, 2198 .exit = tegra_dc_exit, 2199 .suspend = tegra_dc_runtime_suspend, 2200 .resume = tegra_dc_runtime_resume, 2201 }; 2202 2203 static const struct tegra_dc_soc_info tegra20_dc_soc_info = { 2204 .supports_background_color = false, 2205 .supports_interlacing = false, 2206 .supports_cursor = false, 2207 .supports_block_linear = false, 2208 .has_legacy_blending = true, 2209 .pitch_align = 8, 2210 .has_powergate = false, 2211 .coupled_pm = true, 2212 .has_nvdisplay = false, 2213 .num_primary_formats = ARRAY_SIZE(tegra20_primary_formats), 2214 .primary_formats = tegra20_primary_formats, 2215 .num_overlay_formats = ARRAY_SIZE(tegra20_overlay_formats), 2216 .overlay_formats = tegra20_overlay_formats, 2217 .modifiers = tegra20_modifiers, 2218 .has_win_a_without_filters = true, 2219 .has_win_c_without_vert_filter = true, 2220 }; 2221 2222 static const struct tegra_dc_soc_info tegra30_dc_soc_info = { 2223 .supports_background_color = false, 2224 .supports_interlacing = false, 2225 .supports_cursor = false, 2226 .supports_block_linear = false, 2227 .has_legacy_blending = true, 2228 .pitch_align = 8, 2229 .has_powergate = false, 2230 .coupled_pm = false, 2231 .has_nvdisplay = false, 2232 .num_primary_formats = ARRAY_SIZE(tegra20_primary_formats), 2233 .primary_formats = tegra20_primary_formats, 2234 .num_overlay_formats = ARRAY_SIZE(tegra20_overlay_formats), 2235 .overlay_formats = tegra20_overlay_formats, 2236 .modifiers = tegra20_modifiers, 2237 .has_win_a_without_filters = false, 2238 .has_win_c_without_vert_filter = false, 2239 }; 2240 2241 static const struct tegra_dc_soc_info tegra114_dc_soc_info = { 2242 .supports_background_color = false, 2243 .supports_interlacing = false, 2244 .supports_cursor = false, 2245 .supports_block_linear = false, 2246 .has_legacy_blending = true, 2247 .pitch_align = 64, 2248 .has_powergate = true, 2249 .coupled_pm = false, 2250 .has_nvdisplay = false, 2251 .num_primary_formats = ARRAY_SIZE(tegra114_primary_formats), 2252 .primary_formats = tegra114_primary_formats, 2253 .num_overlay_formats = ARRAY_SIZE(tegra114_overlay_formats), 2254 .overlay_formats = tegra114_overlay_formats, 2255 .modifiers = tegra20_modifiers, 2256 .has_win_a_without_filters = false, 2257 .has_win_c_without_vert_filter = false, 2258 }; 2259 2260 static const struct tegra_dc_soc_info tegra124_dc_soc_info = { 2261 .supports_background_color = true, 2262 .supports_interlacing = true, 2263 .supports_cursor = true, 2264 .supports_block_linear = true, 2265 .has_legacy_blending = false, 2266 .pitch_align = 64, 2267 .has_powergate = true, 2268 .coupled_pm = false, 2269 .has_nvdisplay = false, 2270 .num_primary_formats = ARRAY_SIZE(tegra124_primary_formats), 2271 .primary_formats = tegra124_primary_formats, 2272 .num_overlay_formats = ARRAY_SIZE(tegra124_overlay_formats), 2273 .overlay_formats = tegra124_overlay_formats, 2274 .modifiers = tegra124_modifiers, 2275 .has_win_a_without_filters = false, 2276 .has_win_c_without_vert_filter = false, 2277 }; 2278 2279 static const struct tegra_dc_soc_info tegra210_dc_soc_info = { 2280 .supports_background_color = true, 2281 .supports_interlacing = true, 2282 .supports_cursor = true, 2283 .supports_block_linear = true, 2284 .has_legacy_blending = false, 2285 .pitch_align = 64, 2286 .has_powergate = true, 2287 .coupled_pm = false, 2288 .has_nvdisplay = false, 2289 .num_primary_formats = ARRAY_SIZE(tegra114_primary_formats), 2290 .primary_formats = tegra114_primary_formats, 2291 .num_overlay_formats = ARRAY_SIZE(tegra114_overlay_formats), 2292 .overlay_formats = tegra114_overlay_formats, 2293 .modifiers = tegra124_modifiers, 2294 .has_win_a_without_filters = false, 2295 .has_win_c_without_vert_filter = false, 2296 }; 2297 2298 static const struct tegra_windowgroup_soc tegra186_dc_wgrps[] = { 2299 { 2300 .index = 0, 2301 .dc = 0, 2302 .windows = (const unsigned int[]) { 0 }, 2303 .num_windows = 1, 2304 }, { 2305 .index = 1, 2306 .dc = 1, 2307 .windows = (const unsigned int[]) { 1 }, 2308 .num_windows = 1, 2309 }, { 2310 .index = 2, 2311 .dc = 1, 2312 .windows = (const unsigned int[]) { 2 }, 2313 .num_windows = 1, 2314 }, { 2315 .index = 3, 2316 .dc = 2, 2317 .windows = (const unsigned int[]) { 3 }, 2318 .num_windows = 1, 2319 }, { 2320 .index = 4, 2321 .dc = 2, 2322 .windows = (const unsigned int[]) { 4 }, 2323 .num_windows = 1, 2324 }, { 2325 .index = 5, 2326 .dc = 2, 2327 .windows = (const unsigned int[]) { 5 }, 2328 .num_windows = 1, 2329 }, 2330 }; 2331 2332 static const struct tegra_dc_soc_info tegra186_dc_soc_info = { 2333 .supports_background_color = true, 2334 .supports_interlacing = true, 2335 .supports_cursor = true, 2336 .supports_block_linear = true, 2337 .has_legacy_blending = false, 2338 .pitch_align = 64, 2339 .has_powergate = false, 2340 .coupled_pm = false, 2341 .has_nvdisplay = true, 2342 .wgrps = tegra186_dc_wgrps, 2343 .num_wgrps = ARRAY_SIZE(tegra186_dc_wgrps), 2344 }; 2345 2346 static const struct tegra_windowgroup_soc tegra194_dc_wgrps[] = { 2347 { 2348 .index = 0, 2349 .dc = 0, 2350 .windows = (const unsigned int[]) { 0 }, 2351 .num_windows = 1, 2352 }, { 2353 .index = 1, 2354 .dc = 1, 2355 .windows = (const unsigned int[]) { 1 }, 2356 .num_windows = 1, 2357 }, { 2358 .index = 2, 2359 .dc = 1, 2360 .windows = (const unsigned int[]) { 2 }, 2361 .num_windows = 1, 2362 }, { 2363 .index = 3, 2364 .dc = 2, 2365 .windows = (const unsigned int[]) { 3 }, 2366 .num_windows = 1, 2367 }, { 2368 .index = 4, 2369 .dc = 2, 2370 .windows = (const unsigned int[]) { 4 }, 2371 .num_windows = 1, 2372 }, { 2373 .index = 5, 2374 .dc = 2, 2375 .windows = (const unsigned int[]) { 5 }, 2376 .num_windows = 1, 2377 }, 2378 }; 2379 2380 static const struct tegra_dc_soc_info tegra194_dc_soc_info = { 2381 .supports_background_color = true, 2382 .supports_interlacing = true, 2383 .supports_cursor = true, 2384 .supports_block_linear = true, 2385 .has_legacy_blending = false, 2386 .pitch_align = 64, 2387 .has_powergate = false, 2388 .coupled_pm = false, 2389 .has_nvdisplay = true, 2390 .wgrps = tegra194_dc_wgrps, 2391 .num_wgrps = ARRAY_SIZE(tegra194_dc_wgrps), 2392 }; 2393 2394 static const struct of_device_id tegra_dc_of_match[] = { 2395 { 2396 .compatible = "nvidia,tegra194-dc", 2397 .data = &tegra194_dc_soc_info, 2398 }, { 2399 .compatible = "nvidia,tegra186-dc", 2400 .data = &tegra186_dc_soc_info, 2401 }, { 2402 .compatible = "nvidia,tegra210-dc", 2403 .data = &tegra210_dc_soc_info, 2404 }, { 2405 .compatible = "nvidia,tegra124-dc", 2406 .data = &tegra124_dc_soc_info, 2407 }, { 2408 .compatible = "nvidia,tegra114-dc", 2409 .data = &tegra114_dc_soc_info, 2410 }, { 2411 .compatible = "nvidia,tegra30-dc", 2412 .data = &tegra30_dc_soc_info, 2413 }, { 2414 .compatible = "nvidia,tegra20-dc", 2415 .data = &tegra20_dc_soc_info, 2416 }, { 2417 /* sentinel */ 2418 } 2419 }; 2420 MODULE_DEVICE_TABLE(of, tegra_dc_of_match); 2421 2422 static int tegra_dc_parse_dt(struct tegra_dc *dc) 2423 { 2424 struct device_node *np; 2425 u32 value = 0; 2426 int err; 2427 2428 err = of_property_read_u32(dc->dev->of_node, "nvidia,head", &value); 2429 if (err < 0) { 2430 dev_err(dc->dev, "missing \"nvidia,head\" property\n"); 2431 2432 /* 2433 * If the nvidia,head property isn't present, try to find the 2434 * correct head number by looking up the position of this 2435 * display controller's node within the device tree. Assuming 2436 * that the nodes are ordered properly in the DTS file and 2437 * that the translation into a flattened device tree blob 2438 * preserves that ordering this will actually yield the right 2439 * head number. 2440 * 2441 * If those assumptions don't hold, this will still work for 2442 * cases where only a single display controller is used. 2443 */ 2444 for_each_matching_node(np, tegra_dc_of_match) { 2445 if (np == dc->dev->of_node) { 2446 of_node_put(np); 2447 break; 2448 } 2449 2450 value++; 2451 } 2452 } 2453 2454 dc->pipe = value; 2455 2456 return 0; 2457 } 2458 2459 static int tegra_dc_match_by_pipe(struct device *dev, const void *data) 2460 { 2461 struct tegra_dc *dc = dev_get_drvdata(dev); 2462 unsigned int pipe = (unsigned long)(void *)data; 2463 2464 return dc->pipe == pipe; 2465 } 2466 2467 static int tegra_dc_couple(struct tegra_dc *dc) 2468 { 2469 /* 2470 * On Tegra20, DC1 requires DC0 to be taken out of reset in order to 2471 * be enabled, otherwise CPU hangs on writing to CMD_DISPLAY_COMMAND / 2472 * POWER_CONTROL registers during CRTC enabling. 2473 */ 2474 if (dc->soc->coupled_pm && dc->pipe == 1) { 2475 u32 flags = DL_FLAG_PM_RUNTIME | DL_FLAG_AUTOREMOVE_CONSUMER; 2476 struct device_link *link; 2477 struct device *partner; 2478 2479 partner = driver_find_device(dc->dev->driver, NULL, NULL, 2480 tegra_dc_match_by_pipe); 2481 if (!partner) 2482 return -EPROBE_DEFER; 2483 2484 link = device_link_add(dc->dev, partner, flags); 2485 if (!link) { 2486 dev_err(dc->dev, "failed to link controllers\n"); 2487 return -EINVAL; 2488 } 2489 2490 dev_dbg(dc->dev, "coupled to %s\n", dev_name(partner)); 2491 } 2492 2493 return 0; 2494 } 2495 2496 static int tegra_dc_probe(struct platform_device *pdev) 2497 { 2498 struct tegra_dc *dc; 2499 int err; 2500 2501 dc = devm_kzalloc(&pdev->dev, sizeof(*dc), GFP_KERNEL); 2502 if (!dc) 2503 return -ENOMEM; 2504 2505 dc->soc = of_device_get_match_data(&pdev->dev); 2506 2507 INIT_LIST_HEAD(&dc->list); 2508 dc->dev = &pdev->dev; 2509 2510 err = tegra_dc_parse_dt(dc); 2511 if (err < 0) 2512 return err; 2513 2514 err = tegra_dc_couple(dc); 2515 if (err < 0) 2516 return err; 2517 2518 dc->clk = devm_clk_get(&pdev->dev, NULL); 2519 if (IS_ERR(dc->clk)) { 2520 dev_err(&pdev->dev, "failed to get clock\n"); 2521 return PTR_ERR(dc->clk); 2522 } 2523 2524 dc->rst = devm_reset_control_get(&pdev->dev, "dc"); 2525 if (IS_ERR(dc->rst)) { 2526 dev_err(&pdev->dev, "failed to get reset\n"); 2527 return PTR_ERR(dc->rst); 2528 } 2529 2530 /* assert reset and disable clock */ 2531 err = clk_prepare_enable(dc->clk); 2532 if (err < 0) 2533 return err; 2534 2535 usleep_range(2000, 4000); 2536 2537 err = reset_control_assert(dc->rst); 2538 if (err < 0) 2539 return err; 2540 2541 usleep_range(2000, 4000); 2542 2543 clk_disable_unprepare(dc->clk); 2544 2545 if (dc->soc->has_powergate) { 2546 if (dc->pipe == 0) 2547 dc->powergate = TEGRA_POWERGATE_DIS; 2548 else 2549 dc->powergate = TEGRA_POWERGATE_DISB; 2550 2551 tegra_powergate_power_off(dc->powergate); 2552 } 2553 2554 dc->regs = devm_platform_ioremap_resource(pdev, 0); 2555 if (IS_ERR(dc->regs)) 2556 return PTR_ERR(dc->regs); 2557 2558 dc->irq = platform_get_irq(pdev, 0); 2559 if (dc->irq < 0) { 2560 dev_err(&pdev->dev, "failed to get IRQ\n"); 2561 return -ENXIO; 2562 } 2563 2564 err = tegra_dc_rgb_probe(dc); 2565 if (err < 0 && err != -ENODEV) { 2566 const char *level = KERN_ERR; 2567 2568 if (err == -EPROBE_DEFER) 2569 level = KERN_DEBUG; 2570 2571 dev_printk(level, dc->dev, "failed to probe RGB output: %d\n", 2572 err); 2573 return err; 2574 } 2575 2576 platform_set_drvdata(pdev, dc); 2577 pm_runtime_enable(&pdev->dev); 2578 2579 INIT_LIST_HEAD(&dc->client.list); 2580 dc->client.ops = &dc_client_ops; 2581 dc->client.dev = &pdev->dev; 2582 2583 err = host1x_client_register(&dc->client); 2584 if (err < 0) { 2585 dev_err(&pdev->dev, "failed to register host1x client: %d\n", 2586 err); 2587 goto disable_pm; 2588 } 2589 2590 return 0; 2591 2592 disable_pm: 2593 pm_runtime_disable(&pdev->dev); 2594 tegra_dc_rgb_remove(dc); 2595 2596 return err; 2597 } 2598 2599 static int tegra_dc_remove(struct platform_device *pdev) 2600 { 2601 struct tegra_dc *dc = platform_get_drvdata(pdev); 2602 int err; 2603 2604 err = host1x_client_unregister(&dc->client); 2605 if (err < 0) { 2606 dev_err(&pdev->dev, "failed to unregister host1x client: %d\n", 2607 err); 2608 return err; 2609 } 2610 2611 err = tegra_dc_rgb_remove(dc); 2612 if (err < 0) { 2613 dev_err(&pdev->dev, "failed to remove RGB output: %d\n", err); 2614 return err; 2615 } 2616 2617 pm_runtime_disable(&pdev->dev); 2618 2619 return 0; 2620 } 2621 2622 struct platform_driver tegra_dc_driver = { 2623 .driver = { 2624 .name = "tegra-dc", 2625 .of_match_table = tegra_dc_of_match, 2626 }, 2627 .probe = tegra_dc_probe, 2628 .remove = tegra_dc_remove, 2629 }; 2630