LXR linux/drivers/gpu/drm/tegra/plane.c

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * Copyright (C) 2017 NVIDIA CORPORATION.  All rights reserved.
   4 */
   5
   6#include <drm/drm_atomic.h>
   7#include <drm/drm_atomic_helper.h>
   8#include <drm/drm_plane_helper.h>
   9
  10#include "dc.h"
  11#include "plane.h"
  12
  13static void tegra_plane_destroy(struct drm_plane *plane)
  14{
  15        struct tegra_plane *p = to_tegra_plane(plane);
  16
  17        drm_plane_cleanup(plane);
  18        kfree(p);
  19}
  20
  21static void tegra_plane_reset(struct drm_plane *plane)
  22{
  23        struct tegra_plane *p = to_tegra_plane(plane);
  24        struct tegra_plane_state *state;
  25
  26        if (plane->state)
  27                __drm_atomic_helper_plane_destroy_state(plane->state);
  28
  29        kfree(plane->state);
  30        plane->state = NULL;
  31
  32        state = kzalloc(sizeof(*state), GFP_KERNEL);
  33        if (state) {
  34                plane->state = &state->base;
  35                plane->state->plane = plane;
  36                plane->state->zpos = p->index;
  37                plane->state->normalized_zpos = p->index;
  38        }
  39}
  40
  41static struct drm_plane_state *
  42tegra_plane_atomic_duplicate_state(struct drm_plane *plane)
  43{
  44        struct tegra_plane_state *state = to_tegra_plane_state(plane->state);
  45        struct tegra_plane_state *copy;
  46        unsigned int i;
  47
  48        copy = kmalloc(sizeof(*copy), GFP_KERNEL);
  49        if (!copy)
  50                return NULL;
  51
  52        __drm_atomic_helper_plane_duplicate_state(plane, &copy->base);
  53        copy->tiling = state->tiling;
  54        copy->format = state->format;
  55        copy->swap = state->swap;
  56        copy->bottom_up = state->bottom_up;
  57        copy->opaque = state->opaque;
  58
  59        for (i = 0; i < 2; i++)
  60                copy->blending[i] = state->blending[i];
  61
  62        return &copy->base;
  63}
  64
  65static void tegra_plane_atomic_destroy_state(struct drm_plane *plane,
  66                                             struct drm_plane_state *state)
  67{
  68        __drm_atomic_helper_plane_destroy_state(state);
  69        kfree(state);
  70}
  71
  72static bool tegra_plane_format_mod_supported(struct drm_plane *plane,
  73                                             uint32_t format,
  74                                             uint64_t modifier)
  75{
  76        const struct drm_format_info *info = drm_format_info(format);
  77
  78        if (modifier == DRM_FORMAT_MOD_LINEAR)
  79                return true;
  80
  81        if (info->num_planes == 1)
  82                return true;
  83
  84        return false;
  85}
  86
  87const struct drm_plane_funcs tegra_plane_funcs = {
  88        .update_plane = drm_atomic_helper_update_plane,
  89        .disable_plane = drm_atomic_helper_disable_plane,
  90        .destroy = tegra_plane_destroy,
  91        .reset = tegra_plane_reset,
  92        .atomic_duplicate_state = tegra_plane_atomic_duplicate_state,
  93        .atomic_destroy_state = tegra_plane_atomic_destroy_state,
  94        .format_mod_supported = tegra_plane_format_mod_supported,
  95};
  96
  97int tegra_plane_state_add(struct tegra_plane *plane,
  98                          struct drm_plane_state *state)
  99{
 100        struct drm_crtc_state *crtc_state;
 101        struct tegra_dc_state *tegra;
 102        int err;
 103
 104        /* Propagate errors from allocation or locking failures. */
 105        crtc_state = drm_atomic_get_crtc_state(state->state, state->crtc);
 106        if (IS_ERR(crtc_state))
 107                return PTR_ERR(crtc_state);
 108
 109        /* Check plane state for visibility and calculate clipping bounds */
 110        err = drm_atomic_helper_check_plane_state(state, crtc_state,
 111                                                  0, INT_MAX, true, true);
 112        if (err < 0)
 113                return err;
 114
 115        tegra = to_dc_state(crtc_state);
 116
 117        tegra->planes |= WIN_A_ACT_REQ << plane->index;
 118
 119        return 0;
 120}
 121
 122int tegra_plane_format(u32 fourcc, u32 *format, u32 *swap)
 123{
 124        /* assume no swapping of fetched data */
 125        if (swap)
 126                *swap = BYTE_SWAP_NOSWAP;
 127
 128        switch (fourcc) {
 129        case DRM_FORMAT_ARGB4444:
 130                *format = WIN_COLOR_DEPTH_B4G4R4A4;
 131                break;
 132
 133        case DRM_FORMAT_ARGB1555:
 134                *format = WIN_COLOR_DEPTH_B5G5R5A1;
 135                break;
 136
 137        case DRM_FORMAT_RGB565:
 138                *format = WIN_COLOR_DEPTH_B5G6R5;
 139                break;
 140
 141        case DRM_FORMAT_RGBA5551:
 142                *format = WIN_COLOR_DEPTH_A1B5G5R5;
 143                break;
 144
 145        case DRM_FORMAT_ARGB8888:
 146                *format = WIN_COLOR_DEPTH_B8G8R8A8;
 147                break;
 148
 149        case DRM_FORMAT_ABGR8888:
 150                *format = WIN_COLOR_DEPTH_R8G8B8A8;
 151                break;
 152
 153        case DRM_FORMAT_ABGR4444:
 154                *format = WIN_COLOR_DEPTH_R4G4B4A4;
 155                break;
 156
 157        case DRM_FORMAT_ABGR1555:
 158                *format = WIN_COLOR_DEPTH_R5G5B5A;
 159                break;
 160
 161        case DRM_FORMAT_BGRA5551:
 162                *format = WIN_COLOR_DEPTH_AR5G5B5;
 163                break;
 164
 165        case DRM_FORMAT_XRGB1555:
 166                *format = WIN_COLOR_DEPTH_B5G5R5X1;
 167                break;
 168
 169        case DRM_FORMAT_RGBX5551:
 170                *format = WIN_COLOR_DEPTH_X1B5G5R5;
 171                break;
 172
 173        case DRM_FORMAT_XBGR1555:
 174                *format = WIN_COLOR_DEPTH_R5G5B5X1;
 175                break;
 176
 177        case DRM_FORMAT_BGRX5551:
 178                *format = WIN_COLOR_DEPTH_X1R5G5B5;
 179                break;
 180
 181        case DRM_FORMAT_BGR565:
 182                *format = WIN_COLOR_DEPTH_R5G6B5;
 183                break;
 184
 185        case DRM_FORMAT_BGRA8888:
 186                *format = WIN_COLOR_DEPTH_A8R8G8B8;
 187                break;
 188
 189        case DRM_FORMAT_RGBA8888:
 190                *format = WIN_COLOR_DEPTH_A8B8G8R8;
 191                break;
 192
 193        case DRM_FORMAT_XRGB8888:
 194                *format = WIN_COLOR_DEPTH_B8G8R8X8;
 195                break;
 196
 197        case DRM_FORMAT_XBGR8888:
 198                *format = WIN_COLOR_DEPTH_R8G8B8X8;
 199                break;
 200
 201        case DRM_FORMAT_UYVY:
 202                *format = WIN_COLOR_DEPTH_YCbCr422;
 203                break;
 204
 205        case DRM_FORMAT_YUYV:
 206                if (!swap)
 207                        return -EINVAL;
 208
 209                *format = WIN_COLOR_DEPTH_YCbCr422;
 210                *swap = BYTE_SWAP_SWAP2;
 211                break;
 212
 213        case DRM_FORMAT_YUV420:
 214                *format = WIN_COLOR_DEPTH_YCbCr420P;
 215                break;
 216
 217        case DRM_FORMAT_YUV422:
 218                *format = WIN_COLOR_DEPTH_YCbCr422P;
 219                break;
 220
 221        default:
 222                return -EINVAL;
 223        }
 224
 225        return 0;
 226}
 227
 228bool tegra_plane_format_is_yuv(unsigned int format, bool *planar)
 229{
 230        switch (format) {
 231        case WIN_COLOR_DEPTH_YCbCr422:
 232        case WIN_COLOR_DEPTH_YUV422:
 233                if (planar)
 234                        *planar = false;
 235
 236                return true;
 237
 238        case WIN_COLOR_DEPTH_YCbCr420P:
 239        case WIN_COLOR_DEPTH_YUV420P:
 240        case WIN_COLOR_DEPTH_YCbCr422P:
 241        case WIN_COLOR_DEPTH_YUV422P:
 242        case WIN_COLOR_DEPTH_YCbCr422R:
 243        case WIN_COLOR_DEPTH_YUV422R:
 244        case WIN_COLOR_DEPTH_YCbCr422RA:
 245        case WIN_COLOR_DEPTH_YUV422RA:
 246                if (planar)
 247                        *planar = true;
 248
 249                return true;
 250        }
 251
 252        if (planar)
 253                *planar = false;
 254
 255        return false;
 256}
 257
 258static bool __drm_format_has_alpha(u32 format)
 259{
 260        switch (format) {
 261        case DRM_FORMAT_ARGB1555:
 262        case DRM_FORMAT_RGBA5551:
 263        case DRM_FORMAT_ABGR8888:
 264        case DRM_FORMAT_ARGB8888:
 265                return true;
 266        }
 267
 268        return false;
 269}
 270
 271static int tegra_plane_format_get_alpha(unsigned int opaque,
 272                                        unsigned int *alpha)
 273{
 274        if (tegra_plane_format_is_yuv(opaque, NULL)) {
 275                *alpha = opaque;
 276                return 0;
 277        }
 278
 279        switch (opaque) {
 280        case WIN_COLOR_DEPTH_B5G5R5X1:
 281                *alpha = WIN_COLOR_DEPTH_B5G5R5A1;
 282                return 0;
 283
 284        case WIN_COLOR_DEPTH_X1B5G5R5:
 285                *alpha = WIN_COLOR_DEPTH_A1B5G5R5;
 286                return 0;
 287
 288        case WIN_COLOR_DEPTH_R8G8B8X8:
 289                *alpha = WIN_COLOR_DEPTH_R8G8B8A8;
 290                return 0;
 291
 292        case WIN_COLOR_DEPTH_B8G8R8X8:
 293                *alpha = WIN_COLOR_DEPTH_B8G8R8A8;
 294                return 0;
 295
 296        case WIN_COLOR_DEPTH_B5G6R5:
 297                *alpha = opaque;
 298                return 0;
 299        }
 300
 301        return -EINVAL;
 302}
 303
 304/*
 305 * This is applicable to Tegra20 and Tegra30 only where the opaque formats can
 306 * be emulated using the alpha formats and alpha blending disabled.
 307 */
 308static int tegra_plane_setup_opacity(struct tegra_plane *tegra,
 309                                     struct tegra_plane_state *state)
 310{
 311        unsigned int format;
 312        int err;
 313
 314        switch (state->format) {
 315        case WIN_COLOR_DEPTH_B5G5R5A1:
 316        case WIN_COLOR_DEPTH_A1B5G5R5:
 317        case WIN_COLOR_DEPTH_R8G8B8A8:
 318        case WIN_COLOR_DEPTH_B8G8R8A8:
 319                state->opaque = false;
 320                break;
 321
 322        default:
 323                err = tegra_plane_format_get_alpha(state->format, &format);
 324                if (err < 0)
 325                        return err;
 326
 327                state->format = format;
 328                state->opaque = true;
 329                break;
 330        }
 331
 332        return 0;
 333}
 334
 335static int tegra_plane_check_transparency(struct tegra_plane *tegra,
 336                                          struct tegra_plane_state *state)
 337{
 338        struct drm_plane_state *old, *plane_state;
 339        struct drm_plane *plane;
 340
 341        old = drm_atomic_get_old_plane_state(state->base.state, &tegra->base);
 342
 343        /* check if zpos / transparency changed */
 344        if (old->normalized_zpos == state->base.normalized_zpos &&
 345            to_tegra_plane_state(old)->opaque == state->opaque)
 346                return 0;
 347
 348        /* include all sibling planes into this commit */
 349        drm_for_each_plane(plane, tegra->base.dev) {
 350                struct tegra_plane *p = to_tegra_plane(plane);
 351
 352                /* skip this plane and planes on different CRTCs */
 353                if (p == tegra || p->dc != tegra->dc)
 354                        continue;
 355
 356                plane_state = drm_atomic_get_plane_state(state->base.state,
 357                                                         plane);
 358                if (IS_ERR(plane_state))
 359                        return PTR_ERR(plane_state);
 360        }
 361
 362        return 1;
 363}
 364
 365static unsigned int tegra_plane_get_overlap_index(struct tegra_plane *plane,
 366                                                  struct tegra_plane *other)
 367{
 368        unsigned int index = 0, i;
 369
 370        WARN_ON(plane == other);
 371
 372        for (i = 0; i < 3; i++) {
 373                if (i == plane->index)
 374                        continue;
 375
 376                if (i == other->index)
 377                        break;
 378
 379                index++;
 380        }
 381
 382        return index;
 383}
 384
 385static void tegra_plane_update_transparency(struct tegra_plane *tegra,
 386                                            struct tegra_plane_state *state)
 387{
 388        struct drm_plane_state *new;
 389        struct drm_plane *plane;
 390        unsigned int i;
 391
 392        for_each_new_plane_in_state(state->base.state, plane, new, i) {
 393                struct tegra_plane *p = to_tegra_plane(plane);
 394                unsigned index;
 395
 396                /* skip this plane and planes on different CRTCs */
 397                if (p == tegra || p->dc != tegra->dc)
 398                        continue;
 399
 400                index = tegra_plane_get_overlap_index(tegra, p);
 401
 402                if (new->fb && __drm_format_has_alpha(new->fb->format->format))
 403                        state->blending[index].alpha = true;
 404                else
 405                        state->blending[index].alpha = false;
 406
 407                if (new->normalized_zpos > state->base.normalized_zpos)
 408                        state->blending[index].top = true;
 409                else
 410                        state->blending[index].top = false;
 411
 412                /*
 413                 * Missing framebuffer means that plane is disabled, in this
 414                 * case mark B / C window as top to be able to differentiate
 415                 * windows indices order in regards to zPos for the middle
 416                 * window X / Y registers programming.
 417                 */
 418                if (!new->fb)
 419                        state->blending[index].top = (index == 1);
 420        }
 421}
 422
 423static int tegra_plane_setup_transparency(struct tegra_plane *tegra,
 424                                          struct tegra_plane_state *state)
 425{
 426        struct tegra_plane_state *tegra_state;
 427        struct drm_plane_state *new;
 428        struct drm_plane *plane;
 429        int err;
 430
 431        /*
 432         * If planes zpos / transparency changed, sibling planes blending
 433         * state may require adjustment and in this case they will be included
 434         * into this atom commit, otherwise blending state is unchanged.
 435         */
 436        err = tegra_plane_check_transparency(tegra, state);
 437        if (err <= 0)
 438                return err;
 439
 440        /*
 441         * All planes are now in the atomic state, walk them up and update
 442         * transparency state for each plane.
 443         */
 444        drm_for_each_plane(plane, tegra->base.dev) {
 445                struct tegra_plane *p = to_tegra_plane(plane);
 446
 447                /* skip planes on different CRTCs */
 448                if (p->dc != tegra->dc)
 449                        continue;
 450
 451                new = drm_atomic_get_new_plane_state(state->base.state, plane);
 452                tegra_state = to_tegra_plane_state(new);
 453
 454                /*
 455                 * There is no need to update blending state for the disabled
 456                 * plane.
 457                 */
 458                if (new->fb)
 459                        tegra_plane_update_transparency(p, tegra_state);
 460        }
 461
 462        return 0;
 463}
 464
 465int tegra_plane_setup_legacy_state(struct tegra_plane *tegra,
 466                                   struct tegra_plane_state *state)
 467{
 468        int err;
 469
 470        err = tegra_plane_setup_opacity(tegra, state);
 471        if (err < 0)
 472                return err;
 473
 474        err = tegra_plane_setup_transparency(tegra, state);
 475        if (err < 0)
 476                return err;
 477
 478        return 0;
 479}
 480