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); 960 961 return &plane->base; 962 } 963 964 static const u32 tegra20_overlay_formats[] = { 965 DRM_FORMAT_ARGB4444, 966 DRM_FORMAT_ARGB1555, 967 DRM_FORMAT_RGB565, 968 DRM_FORMAT_RGBA5551, 969 DRM_FORMAT_ABGR8888, 970 DRM_FORMAT_ARGB8888, 971 /* non-native formats */ 972 DRM_FORMAT_XRGB1555, 973 DRM_FORMAT_RGBX5551, 974 DRM_FORMAT_XBGR8888, 975 DRM_FORMAT_XRGB8888, 976 /* planar formats */ 977 DRM_FORMAT_UYVY, 978 DRM_FORMAT_YUYV, 979 DRM_FORMAT_YUV420, 980 DRM_FORMAT_YUV422, 981 }; 982 983 static const u32 tegra114_overlay_formats[] = { 984 DRM_FORMAT_ARGB4444, 985 DRM_FORMAT_ARGB1555, 986 DRM_FORMAT_RGB565, 987 DRM_FORMAT_RGBA5551, 988 DRM_FORMAT_ABGR8888, 989 DRM_FORMAT_ARGB8888, 990 /* new on Tegra114 */ 991 DRM_FORMAT_ABGR4444, 992 DRM_FORMAT_ABGR1555, 993 DRM_FORMAT_BGRA5551, 994 DRM_FORMAT_XRGB1555, 995 DRM_FORMAT_RGBX5551, 996 DRM_FORMAT_XBGR1555, 997 DRM_FORMAT_BGRX5551, 998 DRM_FORMAT_BGR565, 999 DRM_FORMAT_BGRA8888, 1000 DRM_FORMAT_RGBA8888, 1001 DRM_FORMAT_XRGB8888, 1002 DRM_FORMAT_XBGR8888, 1003 /* planar formats */ 1004 DRM_FORMAT_UYVY, 1005 DRM_FORMAT_YUYV, 1006 DRM_FORMAT_YUV420, 1007 DRM_FORMAT_YUV422, 1008 }; 1009 1010 static const u32 tegra124_overlay_formats[] = { 1011 DRM_FORMAT_ARGB4444, 1012 DRM_FORMAT_ARGB1555, 1013 DRM_FORMAT_RGB565, 1014 DRM_FORMAT_RGBA5551, 1015 DRM_FORMAT_ABGR8888, 1016 DRM_FORMAT_ARGB8888, 1017 /* new on Tegra114 */ 1018 DRM_FORMAT_ABGR4444, 1019 DRM_FORMAT_ABGR1555, 1020 DRM_FORMAT_BGRA5551, 1021 DRM_FORMAT_XRGB1555, 1022 DRM_FORMAT_RGBX5551, 1023 DRM_FORMAT_XBGR1555, 1024 DRM_FORMAT_BGRX5551, 1025 DRM_FORMAT_BGR565, 1026 DRM_FORMAT_BGRA8888, 1027 DRM_FORMAT_RGBA8888, 1028 DRM_FORMAT_XRGB8888, 1029 DRM_FORMAT_XBGR8888, 1030 /* new on Tegra124 */ 1031 DRM_FORMAT_RGBX8888, 1032 DRM_FORMAT_BGRX8888, 1033 /* planar formats */ 1034 DRM_FORMAT_UYVY, 1035 DRM_FORMAT_YUYV, 1036 DRM_FORMAT_YUV420, 1037 DRM_FORMAT_YUV422, 1038 }; 1039 1040 static struct drm_plane *tegra_dc_overlay_plane_create(struct drm_device *drm, 1041 struct tegra_dc *dc, 1042 unsigned int index, 1043 bool cursor) 1044 { 1045 unsigned long possible_crtcs = tegra_plane_get_possible_crtcs(drm); 1046 struct tegra_plane *plane; 1047 unsigned int num_formats; 1048 enum drm_plane_type type; 1049 const u32 *formats; 1050 int err; 1051 1052 plane = kzalloc(sizeof(*plane), GFP_KERNEL); 1053 if (!plane) 1054 return ERR_PTR(-ENOMEM); 1055 1056 plane->offset = 0xa00 + 0x200 * index; 1057 plane->index = index; 1058 plane->dc = dc; 1059 1060 num_formats = dc->soc->num_overlay_formats; 1061 formats = dc->soc->overlay_formats; 1062 1063 if (!cursor) 1064 type = DRM_PLANE_TYPE_OVERLAY; 1065 else 1066 type = DRM_PLANE_TYPE_CURSOR; 1067 1068 err = drm_universal_plane_init(drm, &plane->base, possible_crtcs, 1069 &tegra_plane_funcs, formats, 1070 num_formats, NULL, type, NULL); 1071 if (err < 0) { 1072 kfree(plane); 1073 return ERR_PTR(err); 1074 } 1075 1076 drm_plane_helper_add(&plane->base, &tegra_plane_helper_funcs); 1077 drm_plane_create_zpos_property(&plane->base, plane->index, 0, 255); 1078 1079 err = drm_plane_create_rotation_property(&plane->base, 1080 DRM_MODE_ROTATE_0, 1081 DRM_MODE_ROTATE_0 | 1082 DRM_MODE_REFLECT_Y); 1083 if (err < 0) 1084 dev_err(dc->dev, "failed to create rotation property: %d\n", 1085 err); 1086 1087 return &plane->base; 1088 } 1089 1090 static struct drm_plane *tegra_dc_add_shared_planes(struct drm_device *drm, 1091 struct tegra_dc *dc) 1092 { 1093 struct drm_plane *plane, *primary = NULL; 1094 unsigned int i, j; 1095 1096 for (i = 0; i < dc->soc->num_wgrps; i++) { 1097 const struct tegra_windowgroup_soc *wgrp = &dc->soc->wgrps[i]; 1098 1099 if (wgrp->dc == dc->pipe) { 1100 for (j = 0; j < wgrp->num_windows; j++) { 1101 unsigned int index = wgrp->windows[j]; 1102 1103 plane = tegra_shared_plane_create(drm, dc, 1104 wgrp->index, 1105 index); 1106 if (IS_ERR(plane)) 1107 return plane; 1108 1109 /* 1110 * Choose the first shared plane owned by this 1111 * head as the primary plane. 1112 */ 1113 if (!primary) { 1114 plane->type = DRM_PLANE_TYPE_PRIMARY; 1115 primary = plane; 1116 } 1117 } 1118 } 1119 } 1120 1121 return primary; 1122 } 1123 1124 static struct drm_plane *tegra_dc_add_planes(struct drm_device *drm, 1125 struct tegra_dc *dc) 1126 { 1127 struct drm_plane *planes[2], *primary; 1128 unsigned int planes_num; 1129 unsigned int i; 1130 int err; 1131 1132 primary = tegra_primary_plane_create(drm, dc); 1133 if (IS_ERR(primary)) 1134 return primary; 1135 1136 if (dc->soc->supports_cursor) 1137 planes_num = 2; 1138 else 1139 planes_num = 1; 1140 1141 for (i = 0; i < planes_num; i++) { 1142 planes[i] = tegra_dc_overlay_plane_create(drm, dc, 1 + i, 1143 false); 1144 if (IS_ERR(planes[i])) { 1145 err = PTR_ERR(planes[i]); 1146 1147 while (i--) 1148 tegra_plane_funcs.destroy(planes[i]); 1149 1150 tegra_plane_funcs.destroy(primary); 1151 return ERR_PTR(err); 1152 } 1153 } 1154 1155 return primary; 1156 } 1157 1158 static void tegra_dc_destroy(struct drm_crtc *crtc) 1159 { 1160 drm_crtc_cleanup(crtc); 1161 } 1162 1163 static void tegra_crtc_reset(struct drm_crtc *crtc) 1164 { 1165 struct tegra_dc_state *state = kzalloc(sizeof(*state), GFP_KERNEL); 1166 1167 if (crtc->state) 1168 tegra_crtc_atomic_destroy_state(crtc, crtc->state); 1169 1170 __drm_atomic_helper_crtc_reset(crtc, &state->base); 1171 drm_crtc_vblank_reset(crtc); 1172 } 1173 1174 static struct drm_crtc_state * 1175 tegra_crtc_atomic_duplicate_state(struct drm_crtc *crtc) 1176 { 1177 struct tegra_dc_state *state = to_dc_state(crtc->state); 1178 struct tegra_dc_state *copy; 1179 1180 copy = kmalloc(sizeof(*copy), GFP_KERNEL); 1181 if (!copy) 1182 return NULL; 1183 1184 __drm_atomic_helper_crtc_duplicate_state(crtc, ©->base); 1185 copy->clk = state->clk; 1186 copy->pclk = state->pclk; 1187 copy->div = state->div; 1188 copy->planes = state->planes; 1189 1190 return ©->base; 1191 } 1192 1193 static void tegra_crtc_atomic_destroy_state(struct drm_crtc *crtc, 1194 struct drm_crtc_state *state) 1195 { 1196 __drm_atomic_helper_crtc_destroy_state(state); 1197 kfree(state); 1198 } 1199 1200 #define DEBUGFS_REG32(_name) { .name = #_name, .offset = _name } 1201 1202 static const struct debugfs_reg32 tegra_dc_regs[] = { 1203 DEBUGFS_REG32(DC_CMD_GENERAL_INCR_SYNCPT), 1204 DEBUGFS_REG32(DC_CMD_GENERAL_INCR_SYNCPT_CNTRL), 1205 DEBUGFS_REG32(DC_CMD_GENERAL_INCR_SYNCPT_ERROR), 1206 DEBUGFS_REG32(DC_CMD_WIN_A_INCR_SYNCPT), 1207 DEBUGFS_REG32(DC_CMD_WIN_A_INCR_SYNCPT_CNTRL), 1208 DEBUGFS_REG32(DC_CMD_WIN_A_INCR_SYNCPT_ERROR), 1209 DEBUGFS_REG32(DC_CMD_WIN_B_INCR_SYNCPT), 1210 DEBUGFS_REG32(DC_CMD_WIN_B_INCR_SYNCPT_CNTRL), 1211 DEBUGFS_REG32(DC_CMD_WIN_B_INCR_SYNCPT_ERROR), 1212 DEBUGFS_REG32(DC_CMD_WIN_C_INCR_SYNCPT), 1213 DEBUGFS_REG32(DC_CMD_WIN_C_INCR_SYNCPT_CNTRL), 1214 DEBUGFS_REG32(DC_CMD_WIN_C_INCR_SYNCPT_ERROR), 1215 DEBUGFS_REG32(DC_CMD_CONT_SYNCPT_VSYNC), 1216 DEBUGFS_REG32(DC_CMD_DISPLAY_COMMAND_OPTION0), 1217 DEBUGFS_REG32(DC_CMD_DISPLAY_COMMAND), 1218 DEBUGFS_REG32(DC_CMD_SIGNAL_RAISE), 1219 DEBUGFS_REG32(DC_CMD_DISPLAY_POWER_CONTROL), 1220 DEBUGFS_REG32(DC_CMD_INT_STATUS), 1221 DEBUGFS_REG32(DC_CMD_INT_MASK), 1222 DEBUGFS_REG32(DC_CMD_INT_ENABLE), 1223 DEBUGFS_REG32(DC_CMD_INT_TYPE), 1224 DEBUGFS_REG32(DC_CMD_INT_POLARITY), 1225 DEBUGFS_REG32(DC_CMD_SIGNAL_RAISE1), 1226 DEBUGFS_REG32(DC_CMD_SIGNAL_RAISE2), 1227 DEBUGFS_REG32(DC_CMD_SIGNAL_RAISE3), 1228 DEBUGFS_REG32(DC_CMD_STATE_ACCESS), 1229 DEBUGFS_REG32(DC_CMD_STATE_CONTROL), 1230 DEBUGFS_REG32(DC_CMD_DISPLAY_WINDOW_HEADER), 1231 DEBUGFS_REG32(DC_CMD_REG_ACT_CONTROL), 1232 DEBUGFS_REG32(DC_COM_CRC_CONTROL), 1233 DEBUGFS_REG32(DC_COM_CRC_CHECKSUM), 1234 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_ENABLE(0)), 1235 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_ENABLE(1)), 1236 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_ENABLE(2)), 1237 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_ENABLE(3)), 1238 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_POLARITY(0)), 1239 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_POLARITY(1)), 1240 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_POLARITY(2)), 1241 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_POLARITY(3)), 1242 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_DATA(0)), 1243 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_DATA(1)), 1244 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_DATA(2)), 1245 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_DATA(3)), 1246 DEBUGFS_REG32(DC_COM_PIN_INPUT_ENABLE(0)), 1247 DEBUGFS_REG32(DC_COM_PIN_INPUT_ENABLE(1)), 1248 DEBUGFS_REG32(DC_COM_PIN_INPUT_ENABLE(2)), 1249 DEBUGFS_REG32(DC_COM_PIN_INPUT_ENABLE(3)), 1250 DEBUGFS_REG32(DC_COM_PIN_INPUT_DATA(0)), 1251 DEBUGFS_REG32(DC_COM_PIN_INPUT_DATA(1)), 1252 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_SELECT(0)), 1253 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_SELECT(1)), 1254 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_SELECT(2)), 1255 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_SELECT(3)), 1256 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_SELECT(4)), 1257 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_SELECT(5)), 1258 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_SELECT(6)), 1259 DEBUGFS_REG32(DC_COM_PIN_MISC_CONTROL), 1260 DEBUGFS_REG32(DC_COM_PIN_PM0_CONTROL), 1261 DEBUGFS_REG32(DC_COM_PIN_PM0_DUTY_CYCLE), 1262 DEBUGFS_REG32(DC_COM_PIN_PM1_CONTROL), 1263 DEBUGFS_REG32(DC_COM_PIN_PM1_DUTY_CYCLE), 1264 DEBUGFS_REG32(DC_COM_SPI_CONTROL), 1265 DEBUGFS_REG32(DC_COM_SPI_START_BYTE), 1266 DEBUGFS_REG32(DC_COM_HSPI_WRITE_DATA_AB), 1267 DEBUGFS_REG32(DC_COM_HSPI_WRITE_DATA_CD), 1268 DEBUGFS_REG32(DC_COM_HSPI_CS_DC), 1269 DEBUGFS_REG32(DC_COM_SCRATCH_REGISTER_A), 1270 DEBUGFS_REG32(DC_COM_SCRATCH_REGISTER_B), 1271 DEBUGFS_REG32(DC_COM_GPIO_CTRL), 1272 DEBUGFS_REG32(DC_COM_GPIO_DEBOUNCE_COUNTER), 1273 DEBUGFS_REG32(DC_COM_CRC_CHECKSUM_LATCHED), 1274 DEBUGFS_REG32(DC_DISP_DISP_SIGNAL_OPTIONS0), 1275 DEBUGFS_REG32(DC_DISP_DISP_SIGNAL_OPTIONS1), 1276 DEBUGFS_REG32(DC_DISP_DISP_WIN_OPTIONS), 1277 DEBUGFS_REG32(DC_DISP_DISP_MEM_HIGH_PRIORITY), 1278 DEBUGFS_REG32(DC_DISP_DISP_MEM_HIGH_PRIORITY_TIMER), 1279 DEBUGFS_REG32(DC_DISP_DISP_TIMING_OPTIONS), 1280 DEBUGFS_REG32(DC_DISP_REF_TO_SYNC), 1281 DEBUGFS_REG32(DC_DISP_SYNC_WIDTH), 1282 DEBUGFS_REG32(DC_DISP_BACK_PORCH), 1283 DEBUGFS_REG32(DC_DISP_ACTIVE), 1284 DEBUGFS_REG32(DC_DISP_FRONT_PORCH), 1285 DEBUGFS_REG32(DC_DISP_H_PULSE0_CONTROL), 1286 DEBUGFS_REG32(DC_DISP_H_PULSE0_POSITION_A), 1287 DEBUGFS_REG32(DC_DISP_H_PULSE0_POSITION_B), 1288 DEBUGFS_REG32(DC_DISP_H_PULSE0_POSITION_C), 1289 DEBUGFS_REG32(DC_DISP_H_PULSE0_POSITION_D), 1290 DEBUGFS_REG32(DC_DISP_H_PULSE1_CONTROL), 1291 DEBUGFS_REG32(DC_DISP_H_PULSE1_POSITION_A), 1292 DEBUGFS_REG32(DC_DISP_H_PULSE1_POSITION_B), 1293 DEBUGFS_REG32(DC_DISP_H_PULSE1_POSITION_C), 1294 DEBUGFS_REG32(DC_DISP_H_PULSE1_POSITION_D), 1295 DEBUGFS_REG32(DC_DISP_H_PULSE2_CONTROL), 1296 DEBUGFS_REG32(DC_DISP_H_PULSE2_POSITION_A), 1297 DEBUGFS_REG32(DC_DISP_H_PULSE2_POSITION_B), 1298 DEBUGFS_REG32(DC_DISP_H_PULSE2_POSITION_C), 1299 DEBUGFS_REG32(DC_DISP_H_PULSE2_POSITION_D), 1300 DEBUGFS_REG32(DC_DISP_V_PULSE0_CONTROL), 1301 DEBUGFS_REG32(DC_DISP_V_PULSE0_POSITION_A), 1302 DEBUGFS_REG32(DC_DISP_V_PULSE0_POSITION_B), 1303 DEBUGFS_REG32(DC_DISP_V_PULSE0_POSITION_C), 1304 DEBUGFS_REG32(DC_DISP_V_PULSE1_CONTROL), 1305 DEBUGFS_REG32(DC_DISP_V_PULSE1_POSITION_A), 1306 DEBUGFS_REG32(DC_DISP_V_PULSE1_POSITION_B), 1307 DEBUGFS_REG32(DC_DISP_V_PULSE1_POSITION_C), 1308 DEBUGFS_REG32(DC_DISP_V_PULSE2_CONTROL), 1309 DEBUGFS_REG32(DC_DISP_V_PULSE2_POSITION_A), 1310 DEBUGFS_REG32(DC_DISP_V_PULSE3_CONTROL), 1311 DEBUGFS_REG32(DC_DISP_V_PULSE3_POSITION_A), 1312 DEBUGFS_REG32(DC_DISP_M0_CONTROL), 1313 DEBUGFS_REG32(DC_DISP_M1_CONTROL), 1314 DEBUGFS_REG32(DC_DISP_DI_CONTROL), 1315 DEBUGFS_REG32(DC_DISP_PP_CONTROL), 1316 DEBUGFS_REG32(DC_DISP_PP_SELECT_A), 1317 DEBUGFS_REG32(DC_DISP_PP_SELECT_B), 1318 DEBUGFS_REG32(DC_DISP_PP_SELECT_C), 1319 DEBUGFS_REG32(DC_DISP_PP_SELECT_D), 1320 DEBUGFS_REG32(DC_DISP_DISP_CLOCK_CONTROL), 1321 DEBUGFS_REG32(DC_DISP_DISP_INTERFACE_CONTROL), 1322 DEBUGFS_REG32(DC_DISP_DISP_COLOR_CONTROL), 1323 DEBUGFS_REG32(DC_DISP_SHIFT_CLOCK_OPTIONS), 1324 DEBUGFS_REG32(DC_DISP_DATA_ENABLE_OPTIONS), 1325 DEBUGFS_REG32(DC_DISP_SERIAL_INTERFACE_OPTIONS), 1326 DEBUGFS_REG32(DC_DISP_LCD_SPI_OPTIONS), 1327 DEBUGFS_REG32(DC_DISP_BORDER_COLOR), 1328 DEBUGFS_REG32(DC_DISP_COLOR_KEY0_LOWER), 1329 DEBUGFS_REG32(DC_DISP_COLOR_KEY0_UPPER), 1330 DEBUGFS_REG32(DC_DISP_COLOR_KEY1_LOWER), 1331 DEBUGFS_REG32(DC_DISP_COLOR_KEY1_UPPER), 1332 DEBUGFS_REG32(DC_DISP_CURSOR_FOREGROUND), 1333 DEBUGFS_REG32(DC_DISP_CURSOR_BACKGROUND), 1334 DEBUGFS_REG32(DC_DISP_CURSOR_START_ADDR), 1335 DEBUGFS_REG32(DC_DISP_CURSOR_START_ADDR_NS), 1336 DEBUGFS_REG32(DC_DISP_CURSOR_POSITION), 1337 DEBUGFS_REG32(DC_DISP_CURSOR_POSITION_NS), 1338 DEBUGFS_REG32(DC_DISP_INIT_SEQ_CONTROL), 1339 DEBUGFS_REG32(DC_DISP_SPI_INIT_SEQ_DATA_A), 1340 DEBUGFS_REG32(DC_DISP_SPI_INIT_SEQ_DATA_B), 1341 DEBUGFS_REG32(DC_DISP_SPI_INIT_SEQ_DATA_C), 1342 DEBUGFS_REG32(DC_DISP_SPI_INIT_SEQ_DATA_D), 1343 DEBUGFS_REG32(DC_DISP_DC_MCCIF_FIFOCTRL), 1344 DEBUGFS_REG32(DC_DISP_MCCIF_DISPLAY0A_HYST), 1345 DEBUGFS_REG32(DC_DISP_MCCIF_DISPLAY0B_HYST), 1346 DEBUGFS_REG32(DC_DISP_MCCIF_DISPLAY1A_HYST), 1347 DEBUGFS_REG32(DC_DISP_MCCIF_DISPLAY1B_HYST), 1348 DEBUGFS_REG32(DC_DISP_DAC_CRT_CTRL), 1349 DEBUGFS_REG32(DC_DISP_DISP_MISC_CONTROL), 1350 DEBUGFS_REG32(DC_DISP_SD_CONTROL), 1351 DEBUGFS_REG32(DC_DISP_SD_CSC_COEFF), 1352 DEBUGFS_REG32(DC_DISP_SD_LUT(0)), 1353 DEBUGFS_REG32(DC_DISP_SD_LUT(1)), 1354 DEBUGFS_REG32(DC_DISP_SD_LUT(2)), 1355 DEBUGFS_REG32(DC_DISP_SD_LUT(3)), 1356 DEBUGFS_REG32(DC_DISP_SD_LUT(4)), 1357 DEBUGFS_REG32(DC_DISP_SD_LUT(5)), 1358 DEBUGFS_REG32(DC_DISP_SD_LUT(6)), 1359 DEBUGFS_REG32(DC_DISP_SD_LUT(7)), 1360 DEBUGFS_REG32(DC_DISP_SD_LUT(8)), 1361 DEBUGFS_REG32(DC_DISP_SD_FLICKER_CONTROL), 1362 DEBUGFS_REG32(DC_DISP_DC_PIXEL_COUNT), 1363 DEBUGFS_REG32(DC_DISP_SD_HISTOGRAM(0)), 1364 DEBUGFS_REG32(DC_DISP_SD_HISTOGRAM(1)), 1365 DEBUGFS_REG32(DC_DISP_SD_HISTOGRAM(2)), 1366 DEBUGFS_REG32(DC_DISP_SD_HISTOGRAM(3)), 1367 DEBUGFS_REG32(DC_DISP_SD_HISTOGRAM(4)), 1368 DEBUGFS_REG32(DC_DISP_SD_HISTOGRAM(5)), 1369 DEBUGFS_REG32(DC_DISP_SD_HISTOGRAM(6)), 1370 DEBUGFS_REG32(DC_DISP_SD_HISTOGRAM(7)), 1371 DEBUGFS_REG32(DC_DISP_SD_BL_TF(0)), 1372 DEBUGFS_REG32(DC_DISP_SD_BL_TF(1)), 1373 DEBUGFS_REG32(DC_DISP_SD_BL_TF(2)), 1374 DEBUGFS_REG32(DC_DISP_SD_BL_TF(3)), 1375 DEBUGFS_REG32(DC_DISP_SD_BL_CONTROL), 1376 DEBUGFS_REG32(DC_DISP_SD_HW_K_VALUES), 1377 DEBUGFS_REG32(DC_DISP_SD_MAN_K_VALUES), 1378 DEBUGFS_REG32(DC_DISP_CURSOR_START_ADDR_HI), 1379 DEBUGFS_REG32(DC_DISP_BLEND_CURSOR_CONTROL), 1380 DEBUGFS_REG32(DC_WIN_WIN_OPTIONS), 1381 DEBUGFS_REG32(DC_WIN_BYTE_SWAP), 1382 DEBUGFS_REG32(DC_WIN_BUFFER_CONTROL), 1383 DEBUGFS_REG32(DC_WIN_COLOR_DEPTH), 1384 DEBUGFS_REG32(DC_WIN_POSITION), 1385 DEBUGFS_REG32(DC_WIN_SIZE), 1386 DEBUGFS_REG32(DC_WIN_PRESCALED_SIZE), 1387 DEBUGFS_REG32(DC_WIN_H_INITIAL_DDA), 1388 DEBUGFS_REG32(DC_WIN_V_INITIAL_DDA), 1389 DEBUGFS_REG32(DC_WIN_DDA_INC), 1390 DEBUGFS_REG32(DC_WIN_LINE_STRIDE), 1391 DEBUGFS_REG32(DC_WIN_BUF_STRIDE), 1392 DEBUGFS_REG32(DC_WIN_UV_BUF_STRIDE), 1393 DEBUGFS_REG32(DC_WIN_BUFFER_ADDR_MODE), 1394 DEBUGFS_REG32(DC_WIN_DV_CONTROL), 1395 DEBUGFS_REG32(DC_WIN_BLEND_NOKEY), 1396 DEBUGFS_REG32(DC_WIN_BLEND_1WIN), 1397 DEBUGFS_REG32(DC_WIN_BLEND_2WIN_X), 1398 DEBUGFS_REG32(DC_WIN_BLEND_2WIN_Y), 1399 DEBUGFS_REG32(DC_WIN_BLEND_3WIN_XY), 1400 DEBUGFS_REG32(DC_WIN_HP_FETCH_CONTROL), 1401 DEBUGFS_REG32(DC_WINBUF_START_ADDR), 1402 DEBUGFS_REG32(DC_WINBUF_START_ADDR_NS), 1403 DEBUGFS_REG32(DC_WINBUF_START_ADDR_U), 1404 DEBUGFS_REG32(DC_WINBUF_START_ADDR_U_NS), 1405 DEBUGFS_REG32(DC_WINBUF_START_ADDR_V), 1406 DEBUGFS_REG32(DC_WINBUF_START_ADDR_V_NS), 1407 DEBUGFS_REG32(DC_WINBUF_ADDR_H_OFFSET), 1408 DEBUGFS_REG32(DC_WINBUF_ADDR_H_OFFSET_NS), 1409 DEBUGFS_REG32(DC_WINBUF_ADDR_V_OFFSET), 1410 DEBUGFS_REG32(DC_WINBUF_ADDR_V_OFFSET_NS), 1411 DEBUGFS_REG32(DC_WINBUF_UFLOW_STATUS), 1412 DEBUGFS_REG32(DC_WINBUF_AD_UFLOW_STATUS), 1413 DEBUGFS_REG32(DC_WINBUF_BD_UFLOW_STATUS), 1414 DEBUGFS_REG32(DC_WINBUF_CD_UFLOW_STATUS), 1415 }; 1416 1417 static int tegra_dc_show_regs(struct seq_file *s, void *data) 1418 { 1419 struct drm_info_node *node = s->private; 1420 struct tegra_dc *dc = node->info_ent->data; 1421 unsigned int i; 1422 int err = 0; 1423 1424 drm_modeset_lock(&dc->base.mutex, NULL); 1425 1426 if (!dc->base.state->active) { 1427 err = -EBUSY; 1428 goto unlock; 1429 } 1430 1431 for (i = 0; i < ARRAY_SIZE(tegra_dc_regs); i++) { 1432 unsigned int offset = tegra_dc_regs[i].offset; 1433 1434 seq_printf(s, "%-40s %#05x %08x\n", tegra_dc_regs[i].name, 1435 offset, tegra_dc_readl(dc, offset)); 1436 } 1437 1438 unlock: 1439 drm_modeset_unlock(&dc->base.mutex); 1440 return err; 1441 } 1442 1443 static int tegra_dc_show_crc(struct seq_file *s, void *data) 1444 { 1445 struct drm_info_node *node = s->private; 1446 struct tegra_dc *dc = node->info_ent->data; 1447 int err = 0; 1448 u32 value; 1449 1450 drm_modeset_lock(&dc->base.mutex, NULL); 1451 1452 if (!dc->base.state->active) { 1453 err = -EBUSY; 1454 goto unlock; 1455 } 1456 1457 value = DC_COM_CRC_CONTROL_ACTIVE_DATA | DC_COM_CRC_CONTROL_ENABLE; 1458 tegra_dc_writel(dc, value, DC_COM_CRC_CONTROL); 1459 tegra_dc_commit(dc); 1460 1461 drm_crtc_wait_one_vblank(&dc->base); 1462 drm_crtc_wait_one_vblank(&dc->base); 1463 1464 value = tegra_dc_readl(dc, DC_COM_CRC_CHECKSUM); 1465 seq_printf(s, "%08x\n", value); 1466 1467 tegra_dc_writel(dc, 0, DC_COM_CRC_CONTROL); 1468 1469 unlock: 1470 drm_modeset_unlock(&dc->base.mutex); 1471 return err; 1472 } 1473 1474 static int tegra_dc_show_stats(struct seq_file *s, void *data) 1475 { 1476 struct drm_info_node *node = s->private; 1477 struct tegra_dc *dc = node->info_ent->data; 1478 1479 seq_printf(s, "frames: %lu\n", dc->stats.frames); 1480 seq_printf(s, "vblank: %lu\n", dc->stats.vblank); 1481 seq_printf(s, "underflow: %lu\n", dc->stats.underflow); 1482 seq_printf(s, "overflow: %lu\n", dc->stats.overflow); 1483 1484 return 0; 1485 } 1486 1487 static struct drm_info_list debugfs_files[] = { 1488 { "regs", tegra_dc_show_regs, 0, NULL }, 1489 { "crc", tegra_dc_show_crc, 0, NULL }, 1490 { "stats", tegra_dc_show_stats, 0, NULL }, 1491 }; 1492 1493 static int tegra_dc_late_register(struct drm_crtc *crtc) 1494 { 1495 unsigned int i, count = ARRAY_SIZE(debugfs_files); 1496 struct drm_minor *minor = crtc->dev->primary; 1497 struct dentry *root; 1498 struct tegra_dc *dc = to_tegra_dc(crtc); 1499 int err; 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 err = drm_debugfs_create_files(dc->debugfs_files, count, root, minor); 1516 if (err < 0) 1517 goto free; 1518 1519 return 0; 1520 1521 free: 1522 kfree(dc->debugfs_files); 1523 dc->debugfs_files = NULL; 1524 1525 return err; 1526 } 1527 1528 static void tegra_dc_early_unregister(struct drm_crtc *crtc) 1529 { 1530 unsigned int count = ARRAY_SIZE(debugfs_files); 1531 struct drm_minor *minor = crtc->dev->primary; 1532 struct tegra_dc *dc = to_tegra_dc(crtc); 1533 1534 drm_debugfs_remove_files(dc->debugfs_files, count, minor); 1535 kfree(dc->debugfs_files); 1536 dc->debugfs_files = NULL; 1537 } 1538 1539 static u32 tegra_dc_get_vblank_counter(struct drm_crtc *crtc) 1540 { 1541 struct tegra_dc *dc = to_tegra_dc(crtc); 1542 1543 /* XXX vblank syncpoints don't work with nvdisplay yet */ 1544 if (dc->syncpt && !dc->soc->has_nvdisplay) 1545 return host1x_syncpt_read(dc->syncpt); 1546 1547 /* fallback to software emulated VBLANK counter */ 1548 return (u32)drm_crtc_vblank_count(&dc->base); 1549 } 1550 1551 static int tegra_dc_enable_vblank(struct drm_crtc *crtc) 1552 { 1553 struct tegra_dc *dc = to_tegra_dc(crtc); 1554 u32 value; 1555 1556 value = tegra_dc_readl(dc, DC_CMD_INT_MASK); 1557 value |= VBLANK_INT; 1558 tegra_dc_writel(dc, value, DC_CMD_INT_MASK); 1559 1560 return 0; 1561 } 1562 1563 static void tegra_dc_disable_vblank(struct drm_crtc *crtc) 1564 { 1565 struct tegra_dc *dc = to_tegra_dc(crtc); 1566 u32 value; 1567 1568 value = tegra_dc_readl(dc, DC_CMD_INT_MASK); 1569 value &= ~VBLANK_INT; 1570 tegra_dc_writel(dc, value, DC_CMD_INT_MASK); 1571 } 1572 1573 static const struct drm_crtc_funcs tegra_crtc_funcs = { 1574 .page_flip = drm_atomic_helper_page_flip, 1575 .set_config = drm_atomic_helper_set_config, 1576 .destroy = tegra_dc_destroy, 1577 .reset = tegra_crtc_reset, 1578 .atomic_duplicate_state = tegra_crtc_atomic_duplicate_state, 1579 .atomic_destroy_state = tegra_crtc_atomic_destroy_state, 1580 .late_register = tegra_dc_late_register, 1581 .early_unregister = tegra_dc_early_unregister, 1582 .get_vblank_counter = tegra_dc_get_vblank_counter, 1583 .enable_vblank = tegra_dc_enable_vblank, 1584 .disable_vblank = tegra_dc_disable_vblank, 1585 }; 1586 1587 static int tegra_dc_set_timings(struct tegra_dc *dc, 1588 struct drm_display_mode *mode) 1589 { 1590 unsigned int h_ref_to_sync = 1; 1591 unsigned int v_ref_to_sync = 1; 1592 unsigned long value; 1593 1594 if (!dc->soc->has_nvdisplay) { 1595 tegra_dc_writel(dc, 0x0, DC_DISP_DISP_TIMING_OPTIONS); 1596 1597 value = (v_ref_to_sync << 16) | h_ref_to_sync; 1598 tegra_dc_writel(dc, value, DC_DISP_REF_TO_SYNC); 1599 } 1600 1601 value = ((mode->vsync_end - mode->vsync_start) << 16) | 1602 ((mode->hsync_end - mode->hsync_start) << 0); 1603 tegra_dc_writel(dc, value, DC_DISP_SYNC_WIDTH); 1604 1605 value = ((mode->vtotal - mode->vsync_end) << 16) | 1606 ((mode->htotal - mode->hsync_end) << 0); 1607 tegra_dc_writel(dc, value, DC_DISP_BACK_PORCH); 1608 1609 value = ((mode->vsync_start - mode->vdisplay) << 16) | 1610 ((mode->hsync_start - mode->hdisplay) << 0); 1611 tegra_dc_writel(dc, value, DC_DISP_FRONT_PORCH); 1612 1613 value = (mode->vdisplay << 16) | mode->hdisplay; 1614 tegra_dc_writel(dc, value, DC_DISP_ACTIVE); 1615 1616 return 0; 1617 } 1618 1619 /** 1620 * tegra_dc_state_setup_clock - check clock settings and store them in atomic 1621 * state 1622 * @dc: display controller 1623 * @crtc_state: CRTC atomic state 1624 * @clk: parent clock for display controller 1625 * @pclk: pixel clock 1626 * @div: shift clock divider 1627 * 1628 * Returns: 1629 * 0 on success or a negative error-code on failure. 1630 */ 1631 int tegra_dc_state_setup_clock(struct tegra_dc *dc, 1632 struct drm_crtc_state *crtc_state, 1633 struct clk *clk, unsigned long pclk, 1634 unsigned int div) 1635 { 1636 struct tegra_dc_state *state = to_dc_state(crtc_state); 1637 1638 if (!clk_has_parent(dc->clk, clk)) 1639 return -EINVAL; 1640 1641 state->clk = clk; 1642 state->pclk = pclk; 1643 state->div = div; 1644 1645 return 0; 1646 } 1647 1648 static void tegra_dc_commit_state(struct tegra_dc *dc, 1649 struct tegra_dc_state *state) 1650 { 1651 u32 value; 1652 int err; 1653 1654 err = clk_set_parent(dc->clk, state->clk); 1655 if (err < 0) 1656 dev_err(dc->dev, "failed to set parent clock: %d\n", err); 1657 1658 /* 1659 * Outputs may not want to change the parent clock rate. This is only 1660 * relevant to Tegra20 where only a single display PLL is available. 1661 * Since that PLL would typically be used for HDMI, an internal LVDS 1662 * panel would need to be driven by some other clock such as PLL_P 1663 * which is shared with other peripherals. Changing the clock rate 1664 * should therefore be avoided. 1665 */ 1666 if (state->pclk > 0) { 1667 err = clk_set_rate(state->clk, state->pclk); 1668 if (err < 0) 1669 dev_err(dc->dev, 1670 "failed to set clock rate to %lu Hz\n", 1671 state->pclk); 1672 } 1673 1674 DRM_DEBUG_KMS("rate: %lu, div: %u\n", clk_get_rate(dc->clk), 1675 state->div); 1676 DRM_DEBUG_KMS("pclk: %lu\n", state->pclk); 1677 1678 if (!dc->soc->has_nvdisplay) { 1679 value = SHIFT_CLK_DIVIDER(state->div) | PIXEL_CLK_DIVIDER_PCD1; 1680 tegra_dc_writel(dc, value, DC_DISP_DISP_CLOCK_CONTROL); 1681 } 1682 1683 err = clk_set_rate(dc->clk, state->pclk); 1684 if (err < 0) 1685 dev_err(dc->dev, "failed to set clock %pC to %lu Hz: %d\n", 1686 dc->clk, state->pclk, err); 1687 } 1688 1689 static void tegra_dc_stop(struct tegra_dc *dc) 1690 { 1691 u32 value; 1692 1693 /* stop the display controller */ 1694 value = tegra_dc_readl(dc, DC_CMD_DISPLAY_COMMAND); 1695 value &= ~DISP_CTRL_MODE_MASK; 1696 tegra_dc_writel(dc, value, DC_CMD_DISPLAY_COMMAND); 1697 1698 tegra_dc_commit(dc); 1699 } 1700 1701 static bool tegra_dc_idle(struct tegra_dc *dc) 1702 { 1703 u32 value; 1704 1705 value = tegra_dc_readl_active(dc, DC_CMD_DISPLAY_COMMAND); 1706 1707 return (value & DISP_CTRL_MODE_MASK) == 0; 1708 } 1709 1710 static int tegra_dc_wait_idle(struct tegra_dc *dc, unsigned long timeout) 1711 { 1712 timeout = jiffies + msecs_to_jiffies(timeout); 1713 1714 while (time_before(jiffies, timeout)) { 1715 if (tegra_dc_idle(dc)) 1716 return 0; 1717 1718 usleep_range(1000, 2000); 1719 } 1720 1721 dev_dbg(dc->dev, "timeout waiting for DC to become idle\n"); 1722 return -ETIMEDOUT; 1723 } 1724 1725 static void tegra_crtc_atomic_disable(struct drm_crtc *crtc, 1726 struct drm_crtc_state *old_state) 1727 { 1728 struct tegra_dc *dc = to_tegra_dc(crtc); 1729 u32 value; 1730 int err; 1731 1732 if (!tegra_dc_idle(dc)) { 1733 tegra_dc_stop(dc); 1734 1735 /* 1736 * Ignore the return value, there isn't anything useful to do 1737 * in case this fails. 1738 */ 1739 tegra_dc_wait_idle(dc, 100); 1740 } 1741 1742 /* 1743 * This should really be part of the RGB encoder driver, but clearing 1744 * these bits has the side-effect of stopping the display controller. 1745 * When that happens no VBLANK interrupts will be raised. At the same 1746 * time the encoder is disabled before the display controller, so the 1747 * above code is always going to timeout waiting for the controller 1748 * to go idle. 1749 * 1750 * Given the close coupling between the RGB encoder and the display 1751 * controller doing it here is still kind of okay. None of the other 1752 * encoder drivers require these bits to be cleared. 1753 * 1754 * XXX: Perhaps given that the display controller is switched off at 1755 * this point anyway maybe clearing these bits isn't even useful for 1756 * the RGB encoder? 1757 */ 1758 if (dc->rgb) { 1759 value = tegra_dc_readl(dc, DC_CMD_DISPLAY_POWER_CONTROL); 1760 value &= ~(PW0_ENABLE | PW1_ENABLE | PW2_ENABLE | PW3_ENABLE | 1761 PW4_ENABLE | PM0_ENABLE | PM1_ENABLE); 1762 tegra_dc_writel(dc, value, DC_CMD_DISPLAY_POWER_CONTROL); 1763 } 1764 1765 tegra_dc_stats_reset(&dc->stats); 1766 drm_crtc_vblank_off(crtc); 1767 1768 spin_lock_irq(&crtc->dev->event_lock); 1769 1770 if (crtc->state->event) { 1771 drm_crtc_send_vblank_event(crtc, crtc->state->event); 1772 crtc->state->event = NULL; 1773 } 1774 1775 spin_unlock_irq(&crtc->dev->event_lock); 1776 1777 err = host1x_client_suspend(&dc->client); 1778 if (err < 0) 1779 dev_err(dc->dev, "failed to suspend: %d\n", err); 1780 } 1781 1782 static void tegra_crtc_atomic_enable(struct drm_crtc *crtc, 1783 struct drm_crtc_state *old_state) 1784 { 1785 struct drm_display_mode *mode = &crtc->state->adjusted_mode; 1786 struct tegra_dc_state *state = to_dc_state(crtc->state); 1787 struct tegra_dc *dc = to_tegra_dc(crtc); 1788 u32 value; 1789 int err; 1790 1791 err = host1x_client_resume(&dc->client); 1792 if (err < 0) { 1793 dev_err(dc->dev, "failed to resume: %d\n", err); 1794 return; 1795 } 1796 1797 /* initialize display controller */ 1798 if (dc->syncpt) { 1799 u32 syncpt = host1x_syncpt_id(dc->syncpt), enable; 1800 1801 if (dc->soc->has_nvdisplay) 1802 enable = 1 << 31; 1803 else 1804 enable = 1 << 8; 1805 1806 value = SYNCPT_CNTRL_NO_STALL; 1807 tegra_dc_writel(dc, value, DC_CMD_GENERAL_INCR_SYNCPT_CNTRL); 1808 1809 value = enable | syncpt; 1810 tegra_dc_writel(dc, value, DC_CMD_CONT_SYNCPT_VSYNC); 1811 } 1812 1813 if (dc->soc->has_nvdisplay) { 1814 value = DSC_TO_UF_INT | DSC_BBUF_UF_INT | DSC_RBUF_UF_INT | 1815 DSC_OBUF_UF_INT; 1816 tegra_dc_writel(dc, value, DC_CMD_INT_TYPE); 1817 1818 value = DSC_TO_UF_INT | DSC_BBUF_UF_INT | DSC_RBUF_UF_INT | 1819 DSC_OBUF_UF_INT | SD3_BUCKET_WALK_DONE_INT | 1820 HEAD_UF_INT | MSF_INT | REG_TMOUT_INT | 1821 REGION_CRC_INT | V_PULSE2_INT | V_PULSE3_INT | 1822 VBLANK_INT | FRAME_END_INT; 1823 tegra_dc_writel(dc, value, DC_CMD_INT_POLARITY); 1824 1825 value = SD3_BUCKET_WALK_DONE_INT | HEAD_UF_INT | VBLANK_INT | 1826 FRAME_END_INT; 1827 tegra_dc_writel(dc, value, DC_CMD_INT_ENABLE); 1828 1829 value = HEAD_UF_INT | REG_TMOUT_INT | FRAME_END_INT; 1830 tegra_dc_writel(dc, value, DC_CMD_INT_MASK); 1831 1832 tegra_dc_writel(dc, READ_MUX, DC_CMD_STATE_ACCESS); 1833 } else { 1834 value = WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT | 1835 WIN_A_OF_INT | WIN_B_OF_INT | WIN_C_OF_INT; 1836 tegra_dc_writel(dc, value, DC_CMD_INT_TYPE); 1837 1838 value = WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT | 1839 WIN_A_OF_INT | WIN_B_OF_INT | WIN_C_OF_INT; 1840 tegra_dc_writel(dc, value, DC_CMD_INT_POLARITY); 1841 1842 /* initialize timer */ 1843 value = CURSOR_THRESHOLD(0) | WINDOW_A_THRESHOLD(0x20) | 1844 WINDOW_B_THRESHOLD(0x20) | WINDOW_C_THRESHOLD(0x20); 1845 tegra_dc_writel(dc, value, DC_DISP_DISP_MEM_HIGH_PRIORITY); 1846 1847 value = CURSOR_THRESHOLD(0) | WINDOW_A_THRESHOLD(1) | 1848 WINDOW_B_THRESHOLD(1) | WINDOW_C_THRESHOLD(1); 1849 tegra_dc_writel(dc, value, DC_DISP_DISP_MEM_HIGH_PRIORITY_TIMER); 1850 1851 value = VBLANK_INT | WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT | 1852 WIN_A_OF_INT | WIN_B_OF_INT | WIN_C_OF_INT; 1853 tegra_dc_writel(dc, value, DC_CMD_INT_ENABLE); 1854 1855 value = WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT | 1856 WIN_A_OF_INT | WIN_B_OF_INT | WIN_C_OF_INT; 1857 tegra_dc_writel(dc, value, DC_CMD_INT_MASK); 1858 } 1859 1860 if (dc->soc->supports_background_color) 1861 tegra_dc_writel(dc, 0, DC_DISP_BLEND_BACKGROUND_COLOR); 1862 else 1863 tegra_dc_writel(dc, 0, DC_DISP_BORDER_COLOR); 1864 1865 /* apply PLL and pixel clock changes */ 1866 tegra_dc_commit_state(dc, state); 1867 1868 /* program display mode */ 1869 tegra_dc_set_timings(dc, mode); 1870 1871 /* interlacing isn't supported yet, so disable it */ 1872 if (dc->soc->supports_interlacing) { 1873 value = tegra_dc_readl(dc, DC_DISP_INTERLACE_CONTROL); 1874 value &= ~INTERLACE_ENABLE; 1875 tegra_dc_writel(dc, value, DC_DISP_INTERLACE_CONTROL); 1876 } 1877 1878 value = tegra_dc_readl(dc, DC_CMD_DISPLAY_COMMAND); 1879 value &= ~DISP_CTRL_MODE_MASK; 1880 value |= DISP_CTRL_MODE_C_DISPLAY; 1881 tegra_dc_writel(dc, value, DC_CMD_DISPLAY_COMMAND); 1882 1883 if (!dc->soc->has_nvdisplay) { 1884 value = tegra_dc_readl(dc, DC_CMD_DISPLAY_POWER_CONTROL); 1885 value |= PW0_ENABLE | PW1_ENABLE | PW2_ENABLE | PW3_ENABLE | 1886 PW4_ENABLE | PM0_ENABLE | PM1_ENABLE; 1887 tegra_dc_writel(dc, value, DC_CMD_DISPLAY_POWER_CONTROL); 1888 } 1889 1890 /* enable underflow reporting and display red for missing pixels */ 1891 if (dc->soc->has_nvdisplay) { 1892 value = UNDERFLOW_MODE_RED | UNDERFLOW_REPORT_ENABLE; 1893 tegra_dc_writel(dc, value, DC_COM_RG_UNDERFLOW); 1894 } 1895 1896 tegra_dc_commit(dc); 1897 1898 drm_crtc_vblank_on(crtc); 1899 } 1900 1901 static void tegra_crtc_atomic_begin(struct drm_crtc *crtc, 1902 struct drm_crtc_state *old_crtc_state) 1903 { 1904 unsigned long flags; 1905 1906 if (crtc->state->event) { 1907 spin_lock_irqsave(&crtc->dev->event_lock, flags); 1908 1909 if (drm_crtc_vblank_get(crtc) != 0) 1910 drm_crtc_send_vblank_event(crtc, crtc->state->event); 1911 else 1912 drm_crtc_arm_vblank_event(crtc, crtc->state->event); 1913 1914 spin_unlock_irqrestore(&crtc->dev->event_lock, flags); 1915 1916 crtc->state->event = NULL; 1917 } 1918 } 1919 1920 static void tegra_crtc_atomic_flush(struct drm_crtc *crtc, 1921 struct drm_crtc_state *old_crtc_state) 1922 { 1923 struct tegra_dc_state *state = to_dc_state(crtc->state); 1924 struct tegra_dc *dc = to_tegra_dc(crtc); 1925 u32 value; 1926 1927 value = state->planes << 8 | GENERAL_UPDATE; 1928 tegra_dc_writel(dc, value, DC_CMD_STATE_CONTROL); 1929 value = tegra_dc_readl(dc, DC_CMD_STATE_CONTROL); 1930 1931 value = state->planes | GENERAL_ACT_REQ; 1932 tegra_dc_writel(dc, value, DC_CMD_STATE_CONTROL); 1933 value = tegra_dc_readl(dc, DC_CMD_STATE_CONTROL); 1934 } 1935 1936 static const struct drm_crtc_helper_funcs tegra_crtc_helper_funcs = { 1937 .atomic_begin = tegra_crtc_atomic_begin, 1938 .atomic_flush = tegra_crtc_atomic_flush, 1939 .atomic_enable = tegra_crtc_atomic_enable, 1940 .atomic_disable = tegra_crtc_atomic_disable, 1941 }; 1942 1943 static irqreturn_t tegra_dc_irq(int irq, void *data) 1944 { 1945 struct tegra_dc *dc = data; 1946 unsigned long status; 1947 1948 status = tegra_dc_readl(dc, DC_CMD_INT_STATUS); 1949 tegra_dc_writel(dc, status, DC_CMD_INT_STATUS); 1950 1951 if (status & FRAME_END_INT) { 1952 /* 1953 dev_dbg(dc->dev, "%s(): frame end\n", __func__); 1954 */ 1955 dc->stats.frames++; 1956 } 1957 1958 if (status & VBLANK_INT) { 1959 /* 1960 dev_dbg(dc->dev, "%s(): vertical blank\n", __func__); 1961 */ 1962 drm_crtc_handle_vblank(&dc->base); 1963 dc->stats.vblank++; 1964 } 1965 1966 if (status & (WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT)) { 1967 /* 1968 dev_dbg(dc->dev, "%s(): underflow\n", __func__); 1969 */ 1970 dc->stats.underflow++; 1971 } 1972 1973 if (status & (WIN_A_OF_INT | WIN_B_OF_INT | WIN_C_OF_INT)) { 1974 /* 1975 dev_dbg(dc->dev, "%s(): overflow\n", __func__); 1976 */ 1977 dc->stats.overflow++; 1978 } 1979 1980 if (status & HEAD_UF_INT) { 1981 dev_dbg_ratelimited(dc->dev, "%s(): head underflow\n", __func__); 1982 dc->stats.underflow++; 1983 } 1984 1985 return IRQ_HANDLED; 1986 } 1987 1988 static bool tegra_dc_has_window_groups(struct tegra_dc *dc) 1989 { 1990 unsigned int i; 1991 1992 if (!dc->soc->wgrps) 1993 return true; 1994 1995 for (i = 0; i < dc->soc->num_wgrps; i++) { 1996 const struct tegra_windowgroup_soc *wgrp = &dc->soc->wgrps[i]; 1997 1998 if (wgrp->dc == dc->pipe && wgrp->num_windows > 0) 1999 return true; 2000 } 2001 2002 return false; 2003 } 2004 2005 static int tegra_dc_init(struct host1x_client *client) 2006 { 2007 struct drm_device *drm = dev_get_drvdata(client->host); 2008 unsigned long flags = HOST1X_SYNCPT_CLIENT_MANAGED; 2009 struct tegra_dc *dc = host1x_client_to_dc(client); 2010 struct tegra_drm *tegra = drm->dev_private; 2011 struct drm_plane *primary = NULL; 2012 struct drm_plane *cursor = NULL; 2013 int err; 2014 2015 /* 2016 * XXX do not register DCs with no window groups because we cannot 2017 * assign a primary plane to them, which in turn will cause KMS to 2018 * crash. 2019 */ 2020 if (!tegra_dc_has_window_groups(dc)) 2021 return 0; 2022 2023 /* 2024 * Set the display hub as the host1x client parent for the display 2025 * controller. This is needed for the runtime reference counting that 2026 * ensures the display hub is always powered when any of the display 2027 * controllers are. 2028 */ 2029 if (dc->soc->has_nvdisplay) 2030 client->parent = &tegra->hub->client; 2031 2032 dc->syncpt = host1x_syncpt_request(client, flags); 2033 if (!dc->syncpt) 2034 dev_warn(dc->dev, "failed to allocate syncpoint\n"); 2035 2036 err = host1x_client_iommu_attach(client); 2037 if (err < 0 && err != -ENODEV) { 2038 dev_err(client->dev, "failed to attach to domain: %d\n", err); 2039 return err; 2040 } 2041 2042 if (dc->soc->wgrps) 2043 primary = tegra_dc_add_shared_planes(drm, dc); 2044 else 2045 primary = tegra_dc_add_planes(drm, dc); 2046 2047 if (IS_ERR(primary)) { 2048 err = PTR_ERR(primary); 2049 goto cleanup; 2050 } 2051 2052 if (dc->soc->supports_cursor) { 2053 cursor = tegra_dc_cursor_plane_create(drm, dc); 2054 if (IS_ERR(cursor)) { 2055 err = PTR_ERR(cursor); 2056 goto cleanup; 2057 } 2058 } else { 2059 /* dedicate one overlay to mouse cursor */ 2060 cursor = tegra_dc_overlay_plane_create(drm, dc, 2, true); 2061 if (IS_ERR(cursor)) { 2062 err = PTR_ERR(cursor); 2063 goto cleanup; 2064 } 2065 } 2066 2067 err = drm_crtc_init_with_planes(drm, &dc->base, primary, cursor, 2068 &tegra_crtc_funcs, NULL); 2069 if (err < 0) 2070 goto cleanup; 2071 2072 drm_crtc_helper_add(&dc->base, &tegra_crtc_helper_funcs); 2073 2074 /* 2075 * Keep track of the minimum pitch alignment across all display 2076 * controllers. 2077 */ 2078 if (dc->soc->pitch_align > tegra->pitch_align) 2079 tegra->pitch_align = dc->soc->pitch_align; 2080 2081 err = tegra_dc_rgb_init(drm, dc); 2082 if (err < 0 && err != -ENODEV) { 2083 dev_err(dc->dev, "failed to initialize RGB output: %d\n", err); 2084 goto cleanup; 2085 } 2086 2087 err = devm_request_irq(dc->dev, dc->irq, tegra_dc_irq, 0, 2088 dev_name(dc->dev), dc); 2089 if (err < 0) { 2090 dev_err(dc->dev, "failed to request IRQ#%u: %d\n", dc->irq, 2091 err); 2092 goto cleanup; 2093 } 2094 2095 /* 2096 * Inherit the DMA parameters (such as maximum segment size) from the 2097 * parent host1x device. 2098 */ 2099 client->dev->dma_parms = client->host->dma_parms; 2100 2101 return 0; 2102 2103 cleanup: 2104 if (!IS_ERR_OR_NULL(cursor)) 2105 drm_plane_cleanup(cursor); 2106 2107 if (!IS_ERR(primary)) 2108 drm_plane_cleanup(primary); 2109 2110 host1x_client_iommu_detach(client); 2111 host1x_syncpt_free(dc->syncpt); 2112 2113 return err; 2114 } 2115 2116 static int tegra_dc_exit(struct host1x_client *client) 2117 { 2118 struct tegra_dc *dc = host1x_client_to_dc(client); 2119 int err; 2120 2121 if (!tegra_dc_has_window_groups(dc)) 2122 return 0; 2123 2124 /* avoid a dangling pointer just in case this disappears */ 2125 client->dev->dma_parms = NULL; 2126 2127 devm_free_irq(dc->dev, dc->irq, dc); 2128 2129 err = tegra_dc_rgb_exit(dc); 2130 if (err) { 2131 dev_err(dc->dev, "failed to shutdown RGB output: %d\n", err); 2132 return err; 2133 } 2134 2135 host1x_client_iommu_detach(client); 2136 host1x_syncpt_free(dc->syncpt); 2137 2138 return 0; 2139 } 2140 2141 static int tegra_dc_runtime_suspend(struct host1x_client *client) 2142 { 2143 struct tegra_dc *dc = host1x_client_to_dc(client); 2144 struct device *dev = client->dev; 2145 int err; 2146 2147 err = reset_control_assert(dc->rst); 2148 if (err < 0) { 2149 dev_err(dev, "failed to assert reset: %d\n", err); 2150 return err; 2151 } 2152 2153 if (dc->soc->has_powergate) 2154 tegra_powergate_power_off(dc->powergate); 2155 2156 clk_disable_unprepare(dc->clk); 2157 pm_runtime_put_sync(dev); 2158 2159 return 0; 2160 } 2161 2162 static int tegra_dc_runtime_resume(struct host1x_client *client) 2163 { 2164 struct tegra_dc *dc = host1x_client_to_dc(client); 2165 struct device *dev = client->dev; 2166 int err; 2167 2168 err = pm_runtime_get_sync(dev); 2169 if (err < 0) { 2170 dev_err(dev, "failed to get runtime PM: %d\n", err); 2171 return err; 2172 } 2173 2174 if (dc->soc->has_powergate) { 2175 err = tegra_powergate_sequence_power_up(dc->powergate, dc->clk, 2176 dc->rst); 2177 if (err < 0) { 2178 dev_err(dev, "failed to power partition: %d\n", err); 2179 goto put_rpm; 2180 } 2181 } else { 2182 err = clk_prepare_enable(dc->clk); 2183 if (err < 0) { 2184 dev_err(dev, "failed to enable clock: %d\n", err); 2185 goto put_rpm; 2186 } 2187 2188 err = reset_control_deassert(dc->rst); 2189 if (err < 0) { 2190 dev_err(dev, "failed to deassert reset: %d\n", err); 2191 goto disable_clk; 2192 } 2193 } 2194 2195 return 0; 2196 2197 disable_clk: 2198 clk_disable_unprepare(dc->clk); 2199 put_rpm: 2200 pm_runtime_put_sync(dev); 2201 return err; 2202 } 2203 2204 static const struct host1x_client_ops dc_client_ops = { 2205 .init = tegra_dc_init, 2206 .exit = tegra_dc_exit, 2207 .suspend = tegra_dc_runtime_suspend, 2208 .resume = tegra_dc_runtime_resume, 2209 }; 2210 2211 static const struct tegra_dc_soc_info tegra20_dc_soc_info = { 2212 .supports_background_color = false, 2213 .supports_interlacing = false, 2214 .supports_cursor = false, 2215 .supports_block_linear = false, 2216 .has_legacy_blending = true, 2217 .pitch_align = 8, 2218 .has_powergate = false, 2219 .coupled_pm = true, 2220 .has_nvdisplay = false, 2221 .num_primary_formats = ARRAY_SIZE(tegra20_primary_formats), 2222 .primary_formats = tegra20_primary_formats, 2223 .num_overlay_formats = ARRAY_SIZE(tegra20_overlay_formats), 2224 .overlay_formats = tegra20_overlay_formats, 2225 .modifiers = tegra20_modifiers, 2226 .has_win_a_without_filters = true, 2227 .has_win_c_without_vert_filter = true, 2228 }; 2229 2230 static const struct tegra_dc_soc_info tegra30_dc_soc_info = { 2231 .supports_background_color = false, 2232 .supports_interlacing = false, 2233 .supports_cursor = false, 2234 .supports_block_linear = false, 2235 .has_legacy_blending = true, 2236 .pitch_align = 8, 2237 .has_powergate = false, 2238 .coupled_pm = false, 2239 .has_nvdisplay = false, 2240 .num_primary_formats = ARRAY_SIZE(tegra20_primary_formats), 2241 .primary_formats = tegra20_primary_formats, 2242 .num_overlay_formats = ARRAY_SIZE(tegra20_overlay_formats), 2243 .overlay_formats = tegra20_overlay_formats, 2244 .modifiers = tegra20_modifiers, 2245 .has_win_a_without_filters = false, 2246 .has_win_c_without_vert_filter = false, 2247 }; 2248 2249 static const struct tegra_dc_soc_info tegra114_dc_soc_info = { 2250 .supports_background_color = false, 2251 .supports_interlacing = false, 2252 .supports_cursor = false, 2253 .supports_block_linear = false, 2254 .has_legacy_blending = true, 2255 .pitch_align = 64, 2256 .has_powergate = true, 2257 .coupled_pm = false, 2258 .has_nvdisplay = false, 2259 .num_primary_formats = ARRAY_SIZE(tegra114_primary_formats), 2260 .primary_formats = tegra114_primary_formats, 2261 .num_overlay_formats = ARRAY_SIZE(tegra114_overlay_formats), 2262 .overlay_formats = tegra114_overlay_formats, 2263 .modifiers = tegra20_modifiers, 2264 .has_win_a_without_filters = false, 2265 .has_win_c_without_vert_filter = false, 2266 }; 2267 2268 static const struct tegra_dc_soc_info tegra124_dc_soc_info = { 2269 .supports_background_color = true, 2270 .supports_interlacing = true, 2271 .supports_cursor = true, 2272 .supports_block_linear = true, 2273 .has_legacy_blending = false, 2274 .pitch_align = 64, 2275 .has_powergate = true, 2276 .coupled_pm = false, 2277 .has_nvdisplay = false, 2278 .num_primary_formats = ARRAY_SIZE(tegra124_primary_formats), 2279 .primary_formats = tegra124_primary_formats, 2280 .num_overlay_formats = ARRAY_SIZE(tegra124_overlay_formats), 2281 .overlay_formats = tegra124_overlay_formats, 2282 .modifiers = tegra124_modifiers, 2283 .has_win_a_without_filters = false, 2284 .has_win_c_without_vert_filter = false, 2285 }; 2286 2287 static const struct tegra_dc_soc_info tegra210_dc_soc_info = { 2288 .supports_background_color = true, 2289 .supports_interlacing = true, 2290 .supports_cursor = true, 2291 .supports_block_linear = true, 2292 .has_legacy_blending = false, 2293 .pitch_align = 64, 2294 .has_powergate = true, 2295 .coupled_pm = false, 2296 .has_nvdisplay = false, 2297 .num_primary_formats = ARRAY_SIZE(tegra114_primary_formats), 2298 .primary_formats = tegra114_primary_formats, 2299 .num_overlay_formats = ARRAY_SIZE(tegra114_overlay_formats), 2300 .overlay_formats = tegra114_overlay_formats, 2301 .modifiers = tegra124_modifiers, 2302 .has_win_a_without_filters = false, 2303 .has_win_c_without_vert_filter = false, 2304 }; 2305 2306 static const struct tegra_windowgroup_soc tegra186_dc_wgrps[] = { 2307 { 2308 .index = 0, 2309 .dc = 0, 2310 .windows = (const unsigned int[]) { 0 }, 2311 .num_windows = 1, 2312 }, { 2313 .index = 1, 2314 .dc = 1, 2315 .windows = (const unsigned int[]) { 1 }, 2316 .num_windows = 1, 2317 }, { 2318 .index = 2, 2319 .dc = 1, 2320 .windows = (const unsigned int[]) { 2 }, 2321 .num_windows = 1, 2322 }, { 2323 .index = 3, 2324 .dc = 2, 2325 .windows = (const unsigned int[]) { 3 }, 2326 .num_windows = 1, 2327 }, { 2328 .index = 4, 2329 .dc = 2, 2330 .windows = (const unsigned int[]) { 4 }, 2331 .num_windows = 1, 2332 }, { 2333 .index = 5, 2334 .dc = 2, 2335 .windows = (const unsigned int[]) { 5 }, 2336 .num_windows = 1, 2337 }, 2338 }; 2339 2340 static const struct tegra_dc_soc_info tegra186_dc_soc_info = { 2341 .supports_background_color = true, 2342 .supports_interlacing = true, 2343 .supports_cursor = true, 2344 .supports_block_linear = true, 2345 .has_legacy_blending = false, 2346 .pitch_align = 64, 2347 .has_powergate = false, 2348 .coupled_pm = false, 2349 .has_nvdisplay = true, 2350 .wgrps = tegra186_dc_wgrps, 2351 .num_wgrps = ARRAY_SIZE(tegra186_dc_wgrps), 2352 }; 2353 2354 static const struct tegra_windowgroup_soc tegra194_dc_wgrps[] = { 2355 { 2356 .index = 0, 2357 .dc = 0, 2358 .windows = (const unsigned int[]) { 0 }, 2359 .num_windows = 1, 2360 }, { 2361 .index = 1, 2362 .dc = 1, 2363 .windows = (const unsigned int[]) { 1 }, 2364 .num_windows = 1, 2365 }, { 2366 .index = 2, 2367 .dc = 1, 2368 .windows = (const unsigned int[]) { 2 }, 2369 .num_windows = 1, 2370 }, { 2371 .index = 3, 2372 .dc = 2, 2373 .windows = (const unsigned int[]) { 3 }, 2374 .num_windows = 1, 2375 }, { 2376 .index = 4, 2377 .dc = 2, 2378 .windows = (const unsigned int[]) { 4 }, 2379 .num_windows = 1, 2380 }, { 2381 .index = 5, 2382 .dc = 2, 2383 .windows = (const unsigned int[]) { 5 }, 2384 .num_windows = 1, 2385 }, 2386 }; 2387 2388 static const struct tegra_dc_soc_info tegra194_dc_soc_info = { 2389 .supports_background_color = true, 2390 .supports_interlacing = true, 2391 .supports_cursor = true, 2392 .supports_block_linear = true, 2393 .has_legacy_blending = false, 2394 .pitch_align = 64, 2395 .has_powergate = false, 2396 .coupled_pm = false, 2397 .has_nvdisplay = true, 2398 .wgrps = tegra194_dc_wgrps, 2399 .num_wgrps = ARRAY_SIZE(tegra194_dc_wgrps), 2400 }; 2401 2402 static const struct of_device_id tegra_dc_of_match[] = { 2403 { 2404 .compatible = "nvidia,tegra194-dc", 2405 .data = &tegra194_dc_soc_info, 2406 }, { 2407 .compatible = "nvidia,tegra186-dc", 2408 .data = &tegra186_dc_soc_info, 2409 }, { 2410 .compatible = "nvidia,tegra210-dc", 2411 .data = &tegra210_dc_soc_info, 2412 }, { 2413 .compatible = "nvidia,tegra124-dc", 2414 .data = &tegra124_dc_soc_info, 2415 }, { 2416 .compatible = "nvidia,tegra114-dc", 2417 .data = &tegra114_dc_soc_info, 2418 }, { 2419 .compatible = "nvidia,tegra30-dc", 2420 .data = &tegra30_dc_soc_info, 2421 }, { 2422 .compatible = "nvidia,tegra20-dc", 2423 .data = &tegra20_dc_soc_info, 2424 }, { 2425 /* sentinel */ 2426 } 2427 }; 2428 MODULE_DEVICE_TABLE(of, tegra_dc_of_match); 2429 2430 static int tegra_dc_parse_dt(struct tegra_dc *dc) 2431 { 2432 struct device_node *np; 2433 u32 value = 0; 2434 int err; 2435 2436 err = of_property_read_u32(dc->dev->of_node, "nvidia,head", &value); 2437 if (err < 0) { 2438 dev_err(dc->dev, "missing \"nvidia,head\" property\n"); 2439 2440 /* 2441 * If the nvidia,head property isn't present, try to find the 2442 * correct head number by looking up the position of this 2443 * display controller's node within the device tree. Assuming 2444 * that the nodes are ordered properly in the DTS file and 2445 * that the translation into a flattened device tree blob 2446 * preserves that ordering this will actually yield the right 2447 * head number. 2448 * 2449 * If those assumptions don't hold, this will still work for 2450 * cases where only a single display controller is used. 2451 */ 2452 for_each_matching_node(np, tegra_dc_of_match) { 2453 if (np == dc->dev->of_node) { 2454 of_node_put(np); 2455 break; 2456 } 2457 2458 value++; 2459 } 2460 } 2461 2462 dc->pipe = value; 2463 2464 return 0; 2465 } 2466 2467 static int tegra_dc_match_by_pipe(struct device *dev, const void *data) 2468 { 2469 struct tegra_dc *dc = dev_get_drvdata(dev); 2470 unsigned int pipe = (unsigned long)(void *)data; 2471 2472 return dc->pipe == pipe; 2473 } 2474 2475 static int tegra_dc_couple(struct tegra_dc *dc) 2476 { 2477 /* 2478 * On Tegra20, DC1 requires DC0 to be taken out of reset in order to 2479 * be enabled, otherwise CPU hangs on writing to CMD_DISPLAY_COMMAND / 2480 * POWER_CONTROL registers during CRTC enabling. 2481 */ 2482 if (dc->soc->coupled_pm && dc->pipe == 1) { 2483 u32 flags = DL_FLAG_PM_RUNTIME | DL_FLAG_AUTOREMOVE_CONSUMER; 2484 struct device_link *link; 2485 struct device *partner; 2486 2487 partner = driver_find_device(dc->dev->driver, NULL, NULL, 2488 tegra_dc_match_by_pipe); 2489 if (!partner) 2490 return -EPROBE_DEFER; 2491 2492 link = device_link_add(dc->dev, partner, flags); 2493 if (!link) { 2494 dev_err(dc->dev, "failed to link controllers\n"); 2495 return -EINVAL; 2496 } 2497 2498 dev_dbg(dc->dev, "coupled to %s\n", dev_name(partner)); 2499 } 2500 2501 return 0; 2502 } 2503 2504 static int tegra_dc_probe(struct platform_device *pdev) 2505 { 2506 struct tegra_dc *dc; 2507 int err; 2508 2509 dc = devm_kzalloc(&pdev->dev, sizeof(*dc), GFP_KERNEL); 2510 if (!dc) 2511 return -ENOMEM; 2512 2513 dc->soc = of_device_get_match_data(&pdev->dev); 2514 2515 INIT_LIST_HEAD(&dc->list); 2516 dc->dev = &pdev->dev; 2517 2518 err = tegra_dc_parse_dt(dc); 2519 if (err < 0) 2520 return err; 2521 2522 err = tegra_dc_couple(dc); 2523 if (err < 0) 2524 return err; 2525 2526 dc->clk = devm_clk_get(&pdev->dev, NULL); 2527 if (IS_ERR(dc->clk)) { 2528 dev_err(&pdev->dev, "failed to get clock\n"); 2529 return PTR_ERR(dc->clk); 2530 } 2531 2532 dc->rst = devm_reset_control_get(&pdev->dev, "dc"); 2533 if (IS_ERR(dc->rst)) { 2534 dev_err(&pdev->dev, "failed to get reset\n"); 2535 return PTR_ERR(dc->rst); 2536 } 2537 2538 /* assert reset and disable clock */ 2539 err = clk_prepare_enable(dc->clk); 2540 if (err < 0) 2541 return err; 2542 2543 usleep_range(2000, 4000); 2544 2545 err = reset_control_assert(dc->rst); 2546 if (err < 0) 2547 return err; 2548 2549 usleep_range(2000, 4000); 2550 2551 clk_disable_unprepare(dc->clk); 2552 2553 if (dc->soc->has_powergate) { 2554 if (dc->pipe == 0) 2555 dc->powergate = TEGRA_POWERGATE_DIS; 2556 else 2557 dc->powergate = TEGRA_POWERGATE_DISB; 2558 2559 tegra_powergate_power_off(dc->powergate); 2560 } 2561 2562 dc->regs = devm_platform_ioremap_resource(pdev, 0); 2563 if (IS_ERR(dc->regs)) 2564 return PTR_ERR(dc->regs); 2565 2566 dc->irq = platform_get_irq(pdev, 0); 2567 if (dc->irq < 0) { 2568 dev_err(&pdev->dev, "failed to get IRQ\n"); 2569 return -ENXIO; 2570 } 2571 2572 err = tegra_dc_rgb_probe(dc); 2573 if (err < 0 && err != -ENODEV) { 2574 const char *level = KERN_ERR; 2575 2576 if (err == -EPROBE_DEFER) 2577 level = KERN_DEBUG; 2578 2579 dev_printk(level, dc->dev, "failed to probe RGB output: %d\n", 2580 err); 2581 return err; 2582 } 2583 2584 platform_set_drvdata(pdev, dc); 2585 pm_runtime_enable(&pdev->dev); 2586 2587 INIT_LIST_HEAD(&dc->client.list); 2588 dc->client.ops = &dc_client_ops; 2589 dc->client.dev = &pdev->dev; 2590 2591 err = host1x_client_register(&dc->client); 2592 if (err < 0) { 2593 dev_err(&pdev->dev, "failed to register host1x client: %d\n", 2594 err); 2595 goto disable_pm; 2596 } 2597 2598 return 0; 2599 2600 disable_pm: 2601 pm_runtime_disable(&pdev->dev); 2602 tegra_dc_rgb_remove(dc); 2603 2604 return err; 2605 } 2606 2607 static int tegra_dc_remove(struct platform_device *pdev) 2608 { 2609 struct tegra_dc *dc = platform_get_drvdata(pdev); 2610 int err; 2611 2612 err = host1x_client_unregister(&dc->client); 2613 if (err < 0) { 2614 dev_err(&pdev->dev, "failed to unregister host1x client: %d\n", 2615 err); 2616 return err; 2617 } 2618 2619 err = tegra_dc_rgb_remove(dc); 2620 if (err < 0) { 2621 dev_err(&pdev->dev, "failed to remove RGB output: %d\n", err); 2622 return err; 2623 } 2624 2625 pm_runtime_disable(&pdev->dev); 2626 2627 return 0; 2628 } 2629 2630 struct platform_driver tegra_dc_driver = { 2631 .driver = { 2632 .name = "tegra-dc", 2633 .of_match_table = tegra_dc_of_match, 2634 }, 2635 .probe = tegra_dc_probe, 2636 .remove = tegra_dc_remove, 2637 }; 2638