drivers/gpu/drm/tests/drm_damage_helper_test.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Test case for drm_damage_helper functions
   4  *
   5  * Copyright (c) 2022 Maíra Canal <[email protected]>
   6  */
   7
   8 #include <kunit/test.h>
   9
  10 #include <drm/drm_damage_helper.h>
  11 #include <drm/drm_framebuffer.h>
  12 #include <drm/drm_plane.h>
  13 #include <drm/drm_drv.h>
  14
  15 struct drm_damage_mock {
  16         struct drm_driver driver;
  17         struct drm_device device;
  18         struct drm_object_properties obj_props;
  19         struct drm_plane plane;
  20         struct drm_property prop;
  21         struct drm_framebuffer fb;
  22         struct drm_plane_state state;
  23         struct drm_plane_state old_state;
  24 };
  25
  26 static int drm_damage_helper_init(struct kunit *test)
  27 {
  28         struct drm_damage_mock *mock;
  29
  30         mock = kunit_kzalloc(test, sizeof(*mock), GFP_KERNEL);
  31         KUNIT_ASSERT_NOT_ERR_OR_NULL(test, mock);
  32
  33         mock->fb.width = 2048;
  34         mock->fb.height = 2048;
  35
  36         mock->state.crtc = ZERO_SIZE_PTR;
  37         mock->state.fb = &mock->fb;
  38         mock->state.visible = true;
  39
  40         mock->old_state.plane = &mock->plane;
  41         mock->state.plane = &mock->plane;
  42
  43         /* just enough so that drm_plane_enable_fb_damage_clips() works */
  44         mock->device.driver = &mock->driver;
  45         mock->device.mode_config.prop_fb_damage_clips = &mock->prop;
  46         mock->plane.dev = &mock->device;
  47         mock->obj_props.count = 0;
  48         mock->plane.base.properties = &mock->obj_props;
  49         mock->prop.base.id = 1; /* 0 is an invalid id */
  50         mock->prop.dev = &mock->device;
  51
  52         drm_plane_enable_fb_damage_clips(&mock->plane);
  53
  54         test->priv = mock;
  55
  56         return 0;
  57 }
  58
  59 static void set_plane_src(struct drm_plane_state *state, int x1, int y1, int x2,
  60                           int y2)
  61 {
  62         state->src_x = x1;
  63         state->src_y = y1;
  64         state->src_w = x2 - x1;
  65         state->src_h = y2 - y1;
  66
  67         state->src.x1 = x1;
  68         state->src.y1 = y1;
  69         state->src.x2 = x2;
  70         state->src.y2 = y2;
  71 }
  72
  73 static void set_damage_clip(struct drm_mode_rect *r, int x1, int y1, int x2,
  74                             int y2)
  75 {
  76         r->x1 = x1;
  77         r->y1 = y1;
  78         r->x2 = x2;
  79         r->y2 = y2;
  80 }
  81
  82 static void set_damage_blob(struct drm_property_blob *damage_blob,
  83                             struct drm_mode_rect *r, u32 size)
  84 {
  85         damage_blob->length = size;
  86         damage_blob->data = r;
  87 }
  88
  89 static void set_plane_damage(struct drm_plane_state *state,
  90                              struct drm_property_blob *damage_blob)
  91 {
  92         state->fb_damage_clips = damage_blob;
  93 }
  94
  95 static void check_damage_clip(struct kunit *test, struct drm_rect *r,
  96                               int x1, int y1, int x2, int y2)
  97 {
  98         struct drm_damage_mock *mock = test->priv;
  99         struct drm_plane_state state = mock->state;
 100
 101         /*
 102          * Round down x1/y1 and round up x2/y2. This is because damage is not in
 103          * 16.16 fixed point so to catch all pixels.
 104          */
 105         int src_x1 = state.src.x1 >> 16;
 106         int src_y1 = state.src.y1 >> 16;
 107         int src_x2 = (state.src.x2 >> 16) + !!(state.src.x2 & 0xFFFF);
 108         int src_y2 = (state.src.y2 >> 16) + !!(state.src.y2 & 0xFFFF);
 109
 110         if (x1 >= x2 || y1 >= y2)
 111                 KUNIT_FAIL(test, "Cannot have damage clip with no dimension.");
 112         if (x1 < src_x1 || y1 < src_y1 || x2 > src_x2 || y2 > src_y2)
 113                 KUNIT_FAIL(test, "Damage cannot be outside rounded plane src.");
 114         if (r->x1 != x1 || r->y1 != y1 || r->x2 != x2 || r->y2 != y2)
 115                 KUNIT_FAIL(test, "Damage = %d %d %d %d, want = %d %d %d %d",
 116                            r->x1, r->y1, r->x2, r->y2, x1, y1, x2, y2);
 117 }
 118
 119 static void drm_test_damage_iter_no_damage(struct kunit *test)
 120 {
 121         struct drm_damage_mock *mock = test->priv;
 122         struct drm_atomic_helper_damage_iter iter;
 123         struct drm_rect clip;
 124         u32 num_hits = 0;
 125
 126         /* Plane src same as fb size. */
 127         set_plane_src(&mock->old_state, 0, 0, mock->fb.width << 16, mock->fb.height << 16);
 128         set_plane_src(&mock->state, 0, 0, mock->fb.width << 16, mock->fb.height << 16);
 129         drm_atomic_helper_damage_iter_init(&iter, &mock->old_state, &mock->state);
 130         drm_atomic_for_each_plane_damage(&iter, &clip)
 131                 num_hits++;
 132
 133         KUNIT_EXPECT_EQ_MSG(test, num_hits, 1, "Should return plane src as damage.");
 134         check_damage_clip(test, &clip, 0, 0, 2048, 2048);
 135 }
 136
 137 static void drm_test_damage_iter_no_damage_fractional_src(struct kunit *test)
 138 {
 139         struct drm_damage_mock *mock = test->priv;
 140         struct drm_atomic_helper_damage_iter iter;
 141         struct drm_rect clip;
 142         u32 num_hits = 0;
 143
 144         /* Plane src has fractional part. */
 145         set_plane_src(&mock->old_state, 0x3fffe, 0x3fffe,
 146                       0x3fffe + (1024 << 16), 0x3fffe + (768 << 16));
 147         set_plane_src(&mock->state, 0x3fffe, 0x3fffe,
 148                       0x3fffe + (1024 << 16), 0x3fffe + (768 << 16));
 149         drm_atomic_helper_damage_iter_init(&iter, &mock->old_state, &mock->state);
 150         drm_atomic_for_each_plane_damage(&iter, &clip)
 151                 num_hits++;
 152
 153         KUNIT_EXPECT_EQ_MSG(test, num_hits, 1,
 154                             "Should return rounded off plane src as damage.");
 155         check_damage_clip(test, &clip, 3, 3, 1028, 772);
 156 }
 157
 158 static void drm_test_damage_iter_no_damage_src_moved(struct kunit *test)
 159 {
 160         struct drm_damage_mock *mock = test->priv;
 161         struct drm_atomic_helper_damage_iter iter;
 162         struct drm_rect clip;
 163         u32 num_hits = 0;
 164
 165         /* Plane src moved since old plane state. */
 166         set_plane_src(&mock->old_state, 0, 0, 1024 << 16, 768 << 16);
 167         set_plane_src(&mock->state, 10 << 16, 10 << 16,
 168                       (10 + 1024) << 16, (10 + 768) << 16);
 169         drm_atomic_helper_damage_iter_init(&iter, &mock->old_state, &mock->state);
 170         drm_atomic_for_each_plane_damage(&iter, &clip)
 171                 num_hits++;
 172
 173         KUNIT_EXPECT_EQ_MSG(test, num_hits, 1, "Should return plane src as damage.");
 174         check_damage_clip(test, &clip, 10, 10, 1034, 778);
 175 }
 176
 177 static void drm_test_damage_iter_no_damage_fractional_src_moved(struct kunit *test)
 178 {
 179         struct drm_damage_mock *mock = test->priv;
 180         struct drm_atomic_helper_damage_iter iter;
 181         struct drm_rect clip;
 182         u32 num_hits = 0;
 183
 184         /* Plane src has fractional part and it moved since old plane state. */
 185         set_plane_src(&mock->old_state, 0x3fffe, 0x3fffe,
 186                       0x3fffe + (1024 << 16), 0x3fffe + (768 << 16));
 187         set_plane_src(&mock->state, 0x40002, 0x40002,
 188                       0x40002 + (1024 << 16), 0x40002 + (768 << 16));
 189         drm_atomic_helper_damage_iter_init(&iter, &mock->old_state, &mock->state);
 190         drm_atomic_for_each_plane_damage(&iter, &clip)
 191                 num_hits++;
 192
 193         KUNIT_EXPECT_EQ_MSG(test, num_hits, 1, "Should return plane src as damage.");
 194         check_damage_clip(test, &clip, 4, 4, 1029, 773);
 195 }
 196
 197 static void drm_test_damage_iter_no_damage_not_visible(struct kunit *test)
 198 {
 199         struct drm_damage_mock *mock = test->priv;
 200         struct drm_atomic_helper_damage_iter iter;
 201         struct drm_rect clip;
 202         u32 num_hits = 0;
 203
 204         mock->state.visible = false;
 205
 206         set_plane_src(&mock->old_state, 0, 0, 1024 << 16, 768 << 16);
 207         set_plane_src(&mock->state, 0, 0, 1024 << 16, 768 << 16);
 208         drm_atomic_helper_damage_iter_init(&iter, &mock->old_state, &mock->state);
 209         drm_atomic_for_each_plane_damage(&iter, &clip)
 210                 num_hits++;
 211
 212         KUNIT_EXPECT_EQ_MSG(test, num_hits, 0, "Should have no damage.");
 213 }
 214
 215 static void drm_test_damage_iter_no_damage_no_crtc(struct kunit *test)
 216 {
 217         struct drm_damage_mock *mock = test->priv;
 218         struct drm_atomic_helper_damage_iter iter;
 219         struct drm_rect clip;
 220         u32 num_hits = 0;
 221
 222         mock->state.crtc = NULL;
 223
 224         set_plane_src(&mock->old_state, 0, 0, 1024 << 16, 768 << 16);
 225         set_plane_src(&mock->state, 0, 0, 1024 << 16, 768 << 16);
 226         drm_atomic_helper_damage_iter_init(&iter, &mock->old_state, &mock->state);
 227         drm_atomic_for_each_plane_damage(&iter, &clip)
 228                 num_hits++;
 229
 230         KUNIT_EXPECT_EQ_MSG(test, num_hits, 0, "Should have no damage.");
 231 }
 232
 233 static void drm_test_damage_iter_no_damage_no_fb(struct kunit *test)
 234 {
 235         struct drm_damage_mock *mock = test->priv;
 236         struct drm_atomic_helper_damage_iter iter;
 237         struct drm_rect clip;
 238         u32 num_hits = 0;
 239
 240         mock->state.fb = NULL;
 241
 242         set_plane_src(&mock->old_state, 0, 0, 1024 << 16, 768 << 16);
 243         set_plane_src(&mock->state, 0, 0, 1024 << 16, 768 << 16);
 244         drm_atomic_helper_damage_iter_init(&iter, &mock->old_state, &mock->state);
 245         drm_atomic_for_each_plane_damage(&iter, &clip)
 246                 num_hits++;
 247
 248         KUNIT_EXPECT_EQ_MSG(test, num_hits, 0, "Should have no damage.");
 249 }
 250
 251 static void drm_test_damage_iter_simple_damage(struct kunit *test)
 252 {
 253         struct drm_damage_mock *mock = test->priv;
 254         struct drm_atomic_helper_damage_iter iter;
 255         struct drm_property_blob damage_blob;
 256         struct drm_mode_rect damage;
 257         struct drm_rect clip;
 258         u32 num_hits = 0;
 259
 260         set_plane_src(&mock->old_state, 0, 0, 1024 << 16, 768 << 16);
 261         set_plane_src(&mock->state, 0, 0, 1024 << 16, 768 << 16);
 262         /* Damage set to plane src */
 263         set_damage_clip(&damage, 0, 0, 1024, 768);
 264         set_damage_blob(&damage_blob, &damage, sizeof(damage));
 265         set_plane_damage(&mock->state, &damage_blob);
 266         drm_atomic_helper_damage_iter_init(&iter, &mock->old_state, &mock->state);
 267         drm_atomic_for_each_plane_damage(&iter, &clip)
 268                 num_hits++;
 269
 270         KUNIT_EXPECT_EQ_MSG(test, num_hits, 1, "Should return damage when set.");
 271         check_damage_clip(test, &clip, 0, 0, 1024, 768);
 272 }
 273
 274 static void drm_test_damage_iter_single_damage(struct kunit *test)
 275 {
 276         struct drm_damage_mock *mock = test->priv;
 277         struct drm_atomic_helper_damage_iter iter;
 278         struct drm_property_blob damage_blob;
 279         struct drm_mode_rect damage;
 280         struct drm_rect clip;
 281         u32 num_hits = 0;
 282
 283         set_plane_src(&mock->old_state, 0, 0, 1024 << 16, 768 << 16);
 284         set_plane_src(&mock->state, 0, 0, 1024 << 16, 768 << 16);
 285         set_damage_clip(&damage, 256, 192, 768, 576);
 286         set_damage_blob(&damage_blob, &damage, sizeof(damage));
 287         set_plane_damage(&mock->state, &damage_blob);
 288         drm_atomic_helper_damage_iter_init(&iter, &mock->old_state, &mock->state);
 289         drm_atomic_for_each_plane_damage(&iter, &clip)
 290                 num_hits++;
 291
 292         KUNIT_EXPECT_EQ_MSG(test, num_hits, 1, "Should return damage when set.");
 293         check_damage_clip(test, &clip, 256, 192, 768, 576);
 294 }
 295
 296 static void drm_test_damage_iter_single_damage_intersect_src(struct kunit *test)
 297 {
 298         struct drm_damage_mock *mock = test->priv;
 299         struct drm_atomic_helper_damage_iter iter;
 300         struct drm_property_blob damage_blob;
 301         struct drm_mode_rect damage;
 302         struct drm_rect clip;
 303         u32 num_hits = 0;
 304
 305         set_plane_src(&mock->old_state, 0, 0, 1024 << 16, 768 << 16);
 306         set_plane_src(&mock->state, 0, 0, 1024 << 16, 768 << 16);
 307         /* Damage intersect with plane src. */
 308         set_damage_clip(&damage, 256, 192, 1360, 768);
 309         set_damage_blob(&damage_blob, &damage, sizeof(damage));
 310         set_plane_damage(&mock->state, &damage_blob);
 311         drm_atomic_helper_damage_iter_init(&iter, &mock->old_state, &mock->state);
 312         drm_atomic_for_each_plane_damage(&iter, &clip)
 313                 num_hits++;
 314
 315         KUNIT_EXPECT_EQ_MSG(test, num_hits, 1, "Should return damage clipped to src.");
 316         check_damage_clip(test, &clip, 256, 192, 1024, 768);
 317 }
 318
 319 static void drm_test_damage_iter_single_damage_outside_src(struct kunit *test)
 320 {
 321         struct drm_damage_mock *mock = test->priv;
 322         struct drm_atomic_helper_damage_iter iter;
 323         struct drm_property_blob damage_blob;
 324         struct drm_mode_rect damage;
 325         struct drm_rect clip;
 326         u32 num_hits = 0;
 327
 328         set_plane_src(&mock->old_state, 0, 0, 1024 << 16, 768 << 16);
 329         set_plane_src(&mock->state, 0, 0, 1024 << 16, 768 << 16);
 330         /* Damage clip outside plane src */
 331         set_damage_clip(&damage, 1360, 1360, 1380, 1380);
 332         set_damage_blob(&damage_blob, &damage, sizeof(damage));
 333         set_plane_damage(&mock->state, &damage_blob);
 334         drm_atomic_helper_damage_iter_init(&iter, &mock->old_state, &mock->state);
 335         drm_atomic_for_each_plane_damage(&iter, &clip)
 336                 num_hits++;
 337
 338         KUNIT_EXPECT_EQ_MSG(test, num_hits, 0, "Should have no damage.");
 339 }
 340
 341 static void drm_test_damage_iter_single_damage_fractional_src(struct kunit *test)
 342 {
 343         struct drm_damage_mock *mock = test->priv;
 344         struct drm_atomic_helper_damage_iter iter;
 345         struct drm_property_blob damage_blob;
 346         struct drm_mode_rect damage;
 347         struct drm_rect clip;
 348         u32 num_hits = 0;
 349
 350         /* Plane src has fractional part. */
 351         set_plane_src(&mock->old_state, 0x40002, 0x40002,
 352                       0x40002 + (1024 << 16), 0x40002 + (768 << 16));
 353         set_plane_src(&mock->state, 0x40002, 0x40002,
 354                       0x40002 + (1024 << 16), 0x40002 + (768 << 16));
 355         set_damage_clip(&damage, 10, 10, 256, 330);
 356         set_damage_blob(&damage_blob, &damage, sizeof(damage));
 357         set_plane_damage(&mock->state, &damage_blob);
 358         drm_atomic_helper_damage_iter_init(&iter, &mock->old_state, &mock->state);
 359         drm_atomic_for_each_plane_damage(&iter, &clip)
 360                 num_hits++;
 361
 362         KUNIT_EXPECT_EQ_MSG(test, num_hits, 1, "Should return damage when set.");
 363         check_damage_clip(test, &clip, 10, 10, 256, 330);
 364 }
 365
 366 static void drm_test_damage_iter_single_damage_intersect_fractional_src(struct kunit *test)
 367 {
 368         struct drm_damage_mock *mock = test->priv;
 369         struct drm_atomic_helper_damage_iter iter;
 370         struct drm_property_blob damage_blob;
 371         struct drm_mode_rect damage;
 372         struct drm_rect clip;
 373         u32 num_hits = 0;
 374
 375         /* Plane src has fractional part. */
 376         set_plane_src(&mock->old_state, 0x40002, 0x40002,
 377                       0x40002 + (1024 << 16), 0x40002 + (768 << 16));
 378         set_plane_src(&mock->state, 0x40002, 0x40002,
 379                       0x40002 + (1024 << 16), 0x40002 + (768 << 16));
 380         /* Damage intersect with plane src. */
 381         set_damage_clip(&damage, 10, 1, 1360, 330);
 382         set_damage_blob(&damage_blob, &damage, sizeof(damage));
 383         set_plane_damage(&mock->state, &damage_blob);
 384         drm_atomic_helper_damage_iter_init(&iter, &mock->old_state, &mock->state);
 385         drm_atomic_for_each_plane_damage(&iter, &clip)
 386                 num_hits++;
 387
 388         KUNIT_EXPECT_EQ_MSG(test, num_hits, 1,
 389                             "Should return damage clipped to rounded off src.");
 390         check_damage_clip(test, &clip, 10, 4, 1029, 330);
 391 }
 392
 393 static void drm_test_damage_iter_single_damage_outside_fractional_src(struct kunit *test)
 394 {
 395         struct drm_damage_mock *mock = test->priv;
 396         struct drm_atomic_helper_damage_iter iter;
 397         struct drm_property_blob damage_blob;
 398         struct drm_mode_rect damage;
 399         struct drm_rect clip;
 400         u32 num_hits = 0;
 401
 402         /* Plane src has fractional part. */
 403         set_plane_src(&mock->old_state, 0x40002, 0x40002,
 404                       0x40002 + (1024 << 16), 0x40002 + (768 << 16));
 405         set_plane_src(&mock->state, 0x40002, 0x40002,
 406                       0x40002 + (1024 << 16), 0x40002 + (768 << 16));
 407         /* Damage clip outside plane src */
 408         set_damage_clip(&damage, 1360, 1360, 1380, 1380);
 409         set_damage_blob(&damage_blob, &damage, sizeof(damage));
 410         set_plane_damage(&mock->state, &damage_blob);
 411         drm_atomic_helper_damage_iter_init(&iter, &mock->old_state, &mock->state);
 412         drm_atomic_for_each_plane_damage(&iter, &clip)
 413                 num_hits++;
 414
 415         KUNIT_EXPECT_EQ_MSG(test, num_hits, 0, "Should have no damage.");
 416 }
 417
 418 static void drm_test_damage_iter_single_damage_src_moved(struct kunit *test)
 419 {
 420         struct drm_damage_mock *mock = test->priv;
 421         struct drm_atomic_helper_damage_iter iter;
 422         struct drm_property_blob damage_blob;
 423         struct drm_mode_rect damage;
 424         struct drm_rect clip;
 425         u32 num_hits = 0;
 426
 427         /* Plane src moved since old plane state. */
 428         set_plane_src(&mock->old_state, 0, 0, 1024 << 16, 768 << 16);
 429         set_plane_src(&mock->state, 10 << 16, 10 << 16,
 430                       (10 + 1024) << 16, (10 + 768) << 16);
 431         set_damage_clip(&damage, 20, 30, 256, 256);
 432         set_damage_blob(&damage_blob, &damage, sizeof(damage));
 433         set_plane_damage(&mock->state, &damage_blob);
 434         drm_atomic_helper_damage_iter_init(&iter, &mock->old_state, &mock->state);
 435         drm_atomic_for_each_plane_damage(&iter, &clip)
 436                 num_hits++;
 437
 438         KUNIT_EXPECT_EQ_MSG(test, num_hits, 1,
 439                             "Should return plane src as damage.");
 440         check_damage_clip(test, &clip, 10, 10, 1034, 778);
 441 }
 442
 443 static void drm_test_damage_iter_single_damage_fractional_src_moved(struct kunit *test)
 444 {
 445         struct drm_damage_mock *mock = test->priv;
 446         struct drm_atomic_helper_damage_iter iter;
 447         struct drm_property_blob damage_blob;
 448         struct drm_mode_rect damage;
 449         struct drm_rect clip;
 450         u32 num_hits = 0;
 451
 452         /* Plane src with fractional part moved since old plane state. */
 453         set_plane_src(&mock->old_state, 0x3fffe, 0x3fffe,
 454                       0x3fffe + (1024 << 16), 0x3fffe + (768 << 16));
 455         set_plane_src(&mock->state, 0x40002, 0x40002,
 456                       0x40002 + (1024 << 16), 0x40002 + (768 << 16));
 457         /* Damage intersect with plane src. */
 458         set_damage_clip(&damage, 20, 30, 1360, 256);
 459         set_damage_blob(&damage_blob, &damage, sizeof(damage));
 460         set_plane_damage(&mock->state, &damage_blob);
 461         drm_atomic_helper_damage_iter_init(&iter, &mock->old_state, &mock->state);
 462         drm_atomic_for_each_plane_damage(&iter, &clip)
 463                 num_hits++;
 464
 465         KUNIT_EXPECT_EQ_MSG(test, num_hits, 1,
 466                             "Should return rounded off plane as damage.");
 467         check_damage_clip(test, &clip, 4, 4, 1029, 773);
 468 }
 469
 470 static void drm_test_damage_iter_damage(struct kunit *test)
 471 {
 472         struct drm_damage_mock *mock = test->priv;
 473         struct drm_atomic_helper_damage_iter iter;
 474         struct drm_property_blob damage_blob;
 475         struct drm_mode_rect damage[2];
 476         struct drm_rect clip;
 477         u32 num_hits = 0;
 478
 479         set_plane_src(&mock->old_state, 0, 0, 1024 << 16, 768 << 16);
 480         set_plane_src(&mock->state, 0, 0, 1024 << 16, 768 << 16);
 481         /* 2 damage clips. */
 482         set_damage_clip(&damage[0], 20, 30, 200, 180);
 483         set_damage_clip(&damage[1], 240, 200, 280, 250);
 484         set_damage_blob(&damage_blob, &damage[0], sizeof(damage));
 485         set_plane_damage(&mock->state, &damage_blob);
 486         drm_atomic_helper_damage_iter_init(&iter, &mock->old_state, &mock->state);
 487         drm_atomic_for_each_plane_damage(&iter, &clip) {
 488                 if (num_hits == 0)
 489                         check_damage_clip(test, &clip, 20, 30, 200, 180);
 490                 if (num_hits == 1)
 491                         check_damage_clip(test, &clip, 240, 200, 280, 250);
 492                 num_hits++;
 493         }
 494
 495         KUNIT_EXPECT_EQ_MSG(test, num_hits, 2, "Should return damage when set.");
 496 }
 497
 498 static void drm_test_damage_iter_damage_one_intersect(struct kunit *test)
 499 {
 500         struct drm_damage_mock *mock = test->priv;
 501         struct drm_atomic_helper_damage_iter iter;
 502         struct drm_property_blob damage_blob;
 503         struct drm_mode_rect damage[2];
 504         struct drm_rect clip;
 505         u32 num_hits = 0;
 506
 507         set_plane_src(&mock->old_state, 0x40002, 0x40002,
 508                       0x40002 + (1024 << 16), 0x40002 + (768 << 16));
 509         set_plane_src(&mock->state, 0x40002, 0x40002,
 510                       0x40002 + (1024 << 16), 0x40002 + (768 << 16));
 511         /* 2 damage clips, one intersect plane src. */
 512         set_damage_clip(&damage[0], 20, 30, 200, 180);
 513         set_damage_clip(&damage[1], 2, 2, 1360, 1360);
 514         set_damage_blob(&damage_blob, &damage[0], sizeof(damage));
 515         set_plane_damage(&mock->state, &damage_blob);
 516         drm_atomic_helper_damage_iter_init(&iter, &mock->old_state, &mock->state);
 517         drm_atomic_for_each_plane_damage(&iter, &clip) {
 518                 if (num_hits == 0)
 519                         check_damage_clip(test, &clip, 20, 30, 200, 180);
 520                 if (num_hits == 1)
 521                         check_damage_clip(test, &clip, 4, 4, 1029, 773);
 522                 num_hits++;
 523         }
 524
 525         KUNIT_EXPECT_EQ_MSG(test, num_hits, 2, "Should return damage when set.");
 526 }
 527
 528 static void drm_test_damage_iter_damage_one_outside(struct kunit *test)
 529 {
 530         struct drm_damage_mock *mock = test->priv;
 531         struct drm_atomic_helper_damage_iter iter;
 532         struct drm_property_blob damage_blob;
 533         struct drm_mode_rect damage[2];
 534         struct drm_rect clip;
 535         u32 num_hits = 0;
 536
 537         set_plane_src(&mock->old_state, 0, 0, 1024 << 16, 768 << 16);
 538         set_plane_src(&mock->state, 0, 0, 1024 << 16, 768 << 16);
 539         /* 2 damage clips, one outside plane src. */
 540         set_damage_clip(&damage[0], 1360, 1360, 1380, 1380);
 541         set_damage_clip(&damage[1], 240, 200, 280, 250);
 542         set_damage_blob(&damage_blob, &damage[0], sizeof(damage));
 543         set_plane_damage(&mock->state, &damage_blob);
 544         drm_atomic_helper_damage_iter_init(&iter, &mock->old_state, &mock->state);
 545         drm_atomic_for_each_plane_damage(&iter, &clip)
 546                 num_hits++;
 547
 548         KUNIT_EXPECT_EQ_MSG(test, num_hits, 1, "Should return damage when set.");
 549         check_damage_clip(test, &clip, 240, 200, 280, 250);
 550 }
 551
 552 static void drm_test_damage_iter_damage_src_moved(struct kunit *test)
 553 {
 554         struct drm_damage_mock *mock = test->priv;
 555         struct drm_atomic_helper_damage_iter iter;
 556         struct drm_property_blob damage_blob;
 557         struct drm_mode_rect damage[2];
 558         struct drm_rect clip;
 559         u32 num_hits = 0;
 560
 561         set_plane_src(&mock->old_state, 0x40002, 0x40002,
 562                       0x40002 + (1024 << 16), 0x40002 + (768 << 16));
 563         set_plane_src(&mock->state, 0x3fffe, 0x3fffe,
 564                       0x3fffe + (1024 << 16), 0x3fffe + (768 << 16));
 565         /* 2 damage clips, one outside plane src. */
 566         set_damage_clip(&damage[0], 1360, 1360, 1380, 1380);
 567         set_damage_clip(&damage[1], 240, 200, 280, 250);
 568         set_damage_blob(&damage_blob, &damage[0], sizeof(damage));
 569         set_plane_damage(&mock->state, &damage_blob);
 570         drm_atomic_helper_damage_iter_init(&iter, &mock->old_state, &mock->state);
 571         drm_atomic_for_each_plane_damage(&iter, &clip)
 572                 num_hits++;
 573
 574         KUNIT_EXPECT_EQ_MSG(test, num_hits, 1,
 575                             "Should return round off plane src as damage.");
 576         check_damage_clip(test, &clip, 3, 3, 1028, 772);
 577 }
 578
 579 static void drm_test_damage_iter_damage_not_visible(struct kunit *test)
 580 {
 581         struct drm_damage_mock *mock = test->priv;
 582         struct drm_atomic_helper_damage_iter iter;
 583         struct drm_property_blob damage_blob;
 584         struct drm_mode_rect damage[2];
 585         struct drm_rect clip;
 586         u32 num_hits = 0;
 587
 588         mock->state.visible = false;
 589
 590         set_plane_src(&mock->old_state, 0x40002, 0x40002,
 591                       0x40002 + (1024 << 16), 0x40002 + (768 << 16));
 592         set_plane_src(&mock->state, 0x3fffe, 0x3fffe,
 593                       0x3fffe + (1024 << 16), 0x3fffe + (768 << 16));
 594         /* 2 damage clips, one outside plane src. */
 595         set_damage_clip(&damage[0], 1360, 1360, 1380, 1380);
 596         set_damage_clip(&damage[1], 240, 200, 280, 250);
 597         set_damage_blob(&damage_blob, &damage[0], sizeof(damage));
 598         set_plane_damage(&mock->state, &damage_blob);
 599         drm_atomic_helper_damage_iter_init(&iter, &mock->old_state, &mock->state);
 600         drm_atomic_for_each_plane_damage(&iter, &clip)
 601                 num_hits++;
 602
 603         KUNIT_EXPECT_EQ_MSG(test, num_hits, 0, "Should not return any damage.");
 604 }
 605
 606 static struct kunit_case drm_damage_helper_tests[] = {
 607         KUNIT_CASE(drm_test_damage_iter_no_damage),
 608         KUNIT_CASE(drm_test_damage_iter_no_damage_fractional_src),
 609         KUNIT_CASE(drm_test_damage_iter_no_damage_src_moved),
 610         KUNIT_CASE(drm_test_damage_iter_no_damage_fractional_src_moved),
 611         KUNIT_CASE(drm_test_damage_iter_no_damage_not_visible),
 612         KUNIT_CASE(drm_test_damage_iter_no_damage_no_crtc),
 613         KUNIT_CASE(drm_test_damage_iter_no_damage_no_fb),
 614         KUNIT_CASE(drm_test_damage_iter_simple_damage),
 615         KUNIT_CASE(drm_test_damage_iter_single_damage),
 616         KUNIT_CASE(drm_test_damage_iter_single_damage_intersect_src),
 617         KUNIT_CASE(drm_test_damage_iter_single_damage_outside_src),
 618         KUNIT_CASE(drm_test_damage_iter_single_damage_fractional_src),
 619         KUNIT_CASE(drm_test_damage_iter_single_damage_intersect_fractional_src),
 620         KUNIT_CASE(drm_test_damage_iter_single_damage_outside_fractional_src),
 621         KUNIT_CASE(drm_test_damage_iter_single_damage_src_moved),
 622         KUNIT_CASE(drm_test_damage_iter_single_damage_fractional_src_moved),
 623         KUNIT_CASE(drm_test_damage_iter_damage),
 624         KUNIT_CASE(drm_test_damage_iter_damage_one_intersect),
 625         KUNIT_CASE(drm_test_damage_iter_damage_one_outside),
 626         KUNIT_CASE(drm_test_damage_iter_damage_src_moved),
 627         KUNIT_CASE(drm_test_damage_iter_damage_not_visible),
 628         { }
 629 };
 630
 631 static struct kunit_suite drm_damage_helper_test_suite = {
 632         .name = "drm_damage_helper",
 633         .init = drm_damage_helper_init,
 634         .test_cases = drm_damage_helper_tests,
 635 };
 636
 637 kunit_test_suite(drm_damage_helper_test_suite);
 638
 639 MODULE_DESCRIPTION("Test case for drm_damage_helper functions");
 640 MODULE_LICENSE("GPL");