Hi Mitul, kernel test robot noticed the following build warnings:
https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Mitul-Golani/drm-i915-scaler-Add-and-compute-scaling-factors/20250107-005708 base: git://anongit.freedesktop.org/drm-intel for-linux-next patch link: https://lore.kernel.org/r/20250106165111.1672722-4-mitulkumar.ajitkumar.golani%40intel.com patch subject: [PATCH v3 3/5] drm/i915/scaler: Compute scaling factors for pipe scaler config: x86_64-randconfig-161-20250107 (https://download.01.org/0day-ci/archive/20250108/[email protected]/config) compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <[email protected]> | Reported-by: Dan Carpenter <[email protected]> | Closes: https://lore.kernel.org/r/[email protected]/ smatch warnings: drivers/gpu/drm/i915/display/skl_scaler.c:451 intel_atomic_setup_scaler() error: uninitialized symbol 'hscale'. drivers/gpu/drm/i915/display/skl_scaler.c:452 intel_atomic_setup_scaler() error: uninitialized symbol 'vscale'. vim +/hscale +451 drivers/gpu/drm/i915/display/skl_scaler.c 61e24d4de0edbc Mitul Golani 2025-01-06 312 static int intel_atomic_setup_scaler(struct intel_crtc_state *crtc_state, 7488f64e89b02f Ville Syrjälä 2024-11-07 313 int num_scalers_need, struct intel_crtc *crtc, 8976b18249407d Ville Syrjälä 2023-04-18 314 const char *name, int idx, 8976b18249407d Ville Syrjälä 2023-04-18 315 struct intel_plane_state *plane_state, 8976b18249407d Ville Syrjälä 2023-04-18 316 int *scaler_id) 8976b18249407d Ville Syrjälä 2023-04-18 317 { 3360d4d6d42ab3 Ville Syrjälä 2024-11-07 318 struct intel_display *display = to_intel_display(crtc); 61e24d4de0edbc Mitul Golani 2025-01-06 319 struct intel_crtc_scaler_state *scaler_state = 61e24d4de0edbc Mitul Golani 2025-01-06 320 &crtc_state->scaler_state; 7488f64e89b02f Ville Syrjälä 2024-11-07 321 struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); 8976b18249407d Ville Syrjälä 2023-04-18 322 u32 mode; 7c369018e87617 Mitul Golani 2025-01-06 323 int hscale, vscale; 8976b18249407d Ville Syrjälä 2023-04-18 324 ecf2afc59c1ea3 Ville Syrjälä 2024-11-07 325 if (*scaler_id < 0) ecf2afc59c1ea3 Ville Syrjälä 2024-11-07 326 *scaler_id = intel_allocate_scaler(scaler_state, crtc); 8976b18249407d Ville Syrjälä 2023-04-18 327 3360d4d6d42ab3 Ville Syrjälä 2024-11-07 328 if (drm_WARN(display->drm, *scaler_id < 0, 8976b18249407d Ville Syrjälä 2023-04-18 329 "Cannot find scaler for %s:%d\n", name, idx)) 8976b18249407d Ville Syrjälä 2023-04-18 330 return -EINVAL; 8976b18249407d Ville Syrjälä 2023-04-18 331 8976b18249407d Ville Syrjälä 2023-04-18 332 /* set scaler mode */ 8976b18249407d Ville Syrjälä 2023-04-18 333 if (plane_state && plane_state->hw.fb && 8976b18249407d Ville Syrjälä 2023-04-18 334 plane_state->hw.fb->format->is_yuv && 8976b18249407d Ville Syrjälä 2023-04-18 335 plane_state->hw.fb->format->num_planes > 1) { 8976b18249407d Ville Syrjälä 2023-04-18 336 struct intel_plane *plane = to_intel_plane(plane_state->uapi.plane); 8976b18249407d Ville Syrjälä 2023-04-18 337 3360d4d6d42ab3 Ville Syrjälä 2024-11-07 338 if (DISPLAY_VER(display) == 9) { 8976b18249407d Ville Syrjälä 2023-04-18 339 mode = SKL_PS_SCALER_MODE_NV12; 8976b18249407d Ville Syrjälä 2023-04-18 340 } else if (icl_is_hdr_plane(dev_priv, plane->id)) { 8976b18249407d Ville Syrjälä 2023-04-18 341 /* 8976b18249407d Ville Syrjälä 2023-04-18 342 * On gen11+'s HDR planes we only use the scaler for 8976b18249407d Ville Syrjälä 2023-04-18 343 * scaling. They have a dedicated chroma upsampler, so 8976b18249407d Ville Syrjälä 2023-04-18 344 * we don't need the scaler to upsample the UV plane. 8976b18249407d Ville Syrjälä 2023-04-18 345 */ 8976b18249407d Ville Syrjälä 2023-04-18 346 mode = PS_SCALER_MODE_NORMAL; 8976b18249407d Ville Syrjälä 2023-04-18 347 } else { 8976b18249407d Ville Syrjälä 2023-04-18 348 struct intel_plane *linked = 8976b18249407d Ville Syrjälä 2023-04-18 349 plane_state->planar_linked_plane; 8976b18249407d Ville Syrjälä 2023-04-18 350 8976b18249407d Ville Syrjälä 2023-04-18 351 mode = PS_SCALER_MODE_PLANAR; 8976b18249407d Ville Syrjälä 2023-04-18 352 8976b18249407d Ville Syrjälä 2023-04-18 353 if (linked) ebb4e2b03acc3a Ville Syrjälä 2023-04-26 354 mode |= PS_BINDING_Y_PLANE(linked->id); 8976b18249407d Ville Syrjälä 2023-04-18 355 } 3360d4d6d42ab3 Ville Syrjälä 2024-11-07 356 } else if (DISPLAY_VER(display) >= 10) { 8976b18249407d Ville Syrjälä 2023-04-18 357 mode = PS_SCALER_MODE_NORMAL; 7488f64e89b02f Ville Syrjälä 2024-11-07 358 } else if (num_scalers_need == 1 && crtc->num_scalers > 1) { 8976b18249407d Ville Syrjälä 2023-04-18 359 /* 8976b18249407d Ville Syrjälä 2023-04-18 360 * when only 1 scaler is in use on a pipe with 2 scalers 8976b18249407d Ville Syrjälä 2023-04-18 361 * scaler 0 operates in high quality (HQ) mode. 8976b18249407d Ville Syrjälä 2023-04-18 362 * In this case use scaler 0 to take advantage of HQ mode 8976b18249407d Ville Syrjälä 2023-04-18 363 */ 3de26c81e9ae4a Ville Syrjälä 2024-11-07 364 scaler_state->scalers[*scaler_id].in_use = false; 8976b18249407d Ville Syrjälä 2023-04-18 365 *scaler_id = 0; 3de26c81e9ae4a Ville Syrjälä 2024-11-07 366 scaler_state->scalers[0].in_use = true; 8976b18249407d Ville Syrjälä 2023-04-18 367 mode = SKL_PS_SCALER_MODE_HQ; 8976b18249407d Ville Syrjälä 2023-04-18 368 } else { 8976b18249407d Ville Syrjälä 2023-04-18 369 mode = SKL_PS_SCALER_MODE_DYN; 8976b18249407d Ville Syrjälä 2023-04-18 370 } 8976b18249407d Ville Syrjälä 2023-04-18 371 8976b18249407d Ville Syrjälä 2023-04-18 372 if (plane_state && plane_state->hw.fb) { 8976b18249407d Ville Syrjälä 2023-04-18 373 const struct drm_framebuffer *fb = plane_state->hw.fb; 8976b18249407d Ville Syrjälä 2023-04-18 374 const struct drm_rect *src = &plane_state->uapi.src; 8976b18249407d Ville Syrjälä 2023-04-18 375 const struct drm_rect *dst = &plane_state->uapi.dst; 7c369018e87617 Mitul Golani 2025-01-06 376 int max_vscale, max_hscale; 8976b18249407d Ville Syrjälä 2023-04-18 377 8976b18249407d Ville Syrjälä 2023-04-18 378 /* 8976b18249407d Ville Syrjälä 2023-04-18 379 * FIXME: When two scalers are needed, but only one of 8976b18249407d Ville Syrjälä 2023-04-18 380 * them needs to downscale, we should make sure that 8976b18249407d Ville Syrjälä 2023-04-18 381 * the one that needs downscaling support is assigned 8976b18249407d Ville Syrjälä 2023-04-18 382 * as the first scaler, so we don't reject downscaling 8976b18249407d Ville Syrjälä 2023-04-18 383 * unnecessarily. 8976b18249407d Ville Syrjälä 2023-04-18 384 */ 8976b18249407d Ville Syrjälä 2023-04-18 385 3360d4d6d42ab3 Ville Syrjälä 2024-11-07 386 if (DISPLAY_VER(display) >= 14) { 8976b18249407d Ville Syrjälä 2023-04-18 387 /* 8976b18249407d Ville Syrjälä 2023-04-18 388 * On versions 14 and up, only the first 8976b18249407d Ville Syrjälä 2023-04-18 389 * scaler supports a vertical scaling factor 8976b18249407d Ville Syrjälä 2023-04-18 390 * of more than 1.0, while a horizontal 8976b18249407d Ville Syrjälä 2023-04-18 391 * scaling factor of 3.0 is supported. 8976b18249407d Ville Syrjälä 2023-04-18 392 */ 8976b18249407d Ville Syrjälä 2023-04-18 393 max_hscale = 0x30000 - 1; 8976b18249407d Ville Syrjälä 2023-04-18 394 if (*scaler_id == 0) 8976b18249407d Ville Syrjälä 2023-04-18 395 max_vscale = 0x30000 - 1; 8976b18249407d Ville Syrjälä 2023-04-18 396 else 8976b18249407d Ville Syrjälä 2023-04-18 397 max_vscale = 0x10000; 8976b18249407d Ville Syrjälä 2023-04-18 398 3360d4d6d42ab3 Ville Syrjälä 2024-11-07 399 } else if (DISPLAY_VER(display) >= 10 || 8976b18249407d Ville Syrjälä 2023-04-18 400 !intel_format_info_is_yuv_semiplanar(fb->format, fb->modifier)) { 8976b18249407d Ville Syrjälä 2023-04-18 401 max_hscale = 0x30000 - 1; 8976b18249407d Ville Syrjälä 2023-04-18 402 max_vscale = 0x30000 - 1; 8976b18249407d Ville Syrjälä 2023-04-18 403 } else { 8976b18249407d Ville Syrjälä 2023-04-18 404 max_hscale = 0x20000 - 1; 8976b18249407d Ville Syrjälä 2023-04-18 405 max_vscale = 0x20000 - 1; 8976b18249407d Ville Syrjälä 2023-04-18 406 } 8976b18249407d Ville Syrjälä 2023-04-18 407 8976b18249407d Ville Syrjälä 2023-04-18 408 /* 8976b18249407d Ville Syrjälä 2023-04-18 409 * FIXME: We should change the if-else block above to 8976b18249407d Ville Syrjälä 2023-04-18 410 * support HQ vs dynamic scaler properly. 8976b18249407d Ville Syrjälä 2023-04-18 411 */ 8976b18249407d Ville Syrjälä 2023-04-18 412 8976b18249407d Ville Syrjälä 2023-04-18 413 /* Check if required scaling is within limits */ 8976b18249407d Ville Syrjälä 2023-04-18 414 hscale = drm_rect_calc_hscale(src, dst, 1, max_hscale); 8976b18249407d Ville Syrjälä 2023-04-18 415 vscale = drm_rect_calc_vscale(src, dst, 1, max_vscale); 8976b18249407d Ville Syrjälä 2023-04-18 416 8976b18249407d Ville Syrjälä 2023-04-18 417 if (hscale < 0 || vscale < 0) { 3360d4d6d42ab3 Ville Syrjälä 2024-11-07 418 drm_dbg_kms(display->drm, 8976b18249407d Ville Syrjälä 2023-04-18 419 "Scaler %d doesn't support required plane scaling\n", 8976b18249407d Ville Syrjälä 2023-04-18 420 *scaler_id); 8976b18249407d Ville Syrjälä 2023-04-18 421 drm_rect_debug_print("src: ", src, true); 8976b18249407d Ville Syrjälä 2023-04-18 422 drm_rect_debug_print("dst: ", dst, false); 8976b18249407d Ville Syrjälä 2023-04-18 423 8976b18249407d Ville Syrjälä 2023-04-18 424 return -EINVAL; 8976b18249407d Ville Syrjälä 2023-04-18 425 } 7c369018e87617 Mitul Golani 2025-01-06 426 } 7c369018e87617 Mitul Golani 2025-01-06 427 7c369018e87617 Mitul Golani 2025-01-06 428 if (crtc_state->pch_pfit.enabled) { 7c369018e87617 Mitul Golani 2025-01-06 429 struct drm_rect src; 7c369018e87617 Mitul Golani 2025-01-06 430 7c369018e87617 Mitul Golani 2025-01-06 431 drm_rect_init(&src, 0, 0, 7c369018e87617 Mitul Golani 2025-01-06 432 drm_rect_width(&crtc_state->pipe_src) << 16, 7c369018e87617 Mitul Golani 2025-01-06 433 drm_rect_height(&crtc_state->pipe_src) << 16); 7c369018e87617 Mitul Golani 2025-01-06 434 7c369018e87617 Mitul Golani 2025-01-06 435 hscale = drm_rect_calc_hscale(&src, &crtc_state->pch_pfit.dst, 7c369018e87617 Mitul Golani 2025-01-06 436 0, INT_MAX); 7c369018e87617 Mitul Golani 2025-01-06 437 vscale = drm_rect_calc_vscale(&src, &crtc_state->pch_pfit.dst, 7c369018e87617 Mitul Golani 2025-01-06 438 0, INT_MAX); 7c369018e87617 Mitul Golani 2025-01-06 439 7c369018e87617 Mitul Golani 2025-01-06 440 if (hscale < 0 || vscale < 0) { 7c369018e87617 Mitul Golani 2025-01-06 441 drm_dbg_kms(display->drm, 7c369018e87617 Mitul Golani 2025-01-06 442 "Scaler %d doesn't support required pipe scaling\n", 7c369018e87617 Mitul Golani 2025-01-06 443 *scaler_id); 7c369018e87617 Mitul Golani 2025-01-06 444 drm_rect_debug_print("src: ", &src, true); 7c369018e87617 Mitul Golani 2025-01-06 445 drm_rect_debug_print("dst: ", &crtc_state->pch_pfit.dst, false); 7c369018e87617 Mitul Golani 2025-01-06 446 7c369018e87617 Mitul Golani 2025-01-06 447 return -EINVAL; 7c369018e87617 Mitul Golani 2025-01-06 448 } 7c369018e87617 Mitul Golani 2025-01-06 449 } 0641adb4624b5e Mitul Golani 2025-01-06 450 0641adb4624b5e Mitul Golani 2025-01-06 @451 scaler_state->scalers[*scaler_id].hscale = hscale; 0641adb4624b5e Mitul Golani 2025-01-06 @452 scaler_state->scalers[*scaler_id].vscale = vscale; vscale and hscale are initialized if crtc_state->pch_pfit.enabled or plane_state->hw.fb is true, but otherwise they aren't. 8976b18249407d Ville Syrjälä 2023-04-18 453 3360d4d6d42ab3 Ville Syrjälä 2024-11-07 454 drm_dbg_kms(display->drm, "Attached scaler id %u.%u to %s:%d\n", 7488f64e89b02f Ville Syrjälä 2024-11-07 455 crtc->pipe, *scaler_id, name, idx); 8976b18249407d Ville Syrjälä 2023-04-18 456 scaler_state->scalers[*scaler_id].mode = mode; 8976b18249407d Ville Syrjälä 2023-04-18 457 8976b18249407d Ville Syrjälä 2023-04-18 458 return 0; 8976b18249407d Ville Syrjälä 2023-04-18 459 } -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
