Hi Xin, kernel test robot noticed the following build errors: [auto build test ERROR on linus/master] [also build test ERROR on drm-misc/drm-misc-next v6.14-rc2 next-20250214] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Xin-Ji/drm-bridge-anx7625-Enable-DSC-feature/20250213-203558 base: linus/master patch link: https://lore.kernel.org/r/20250213123331.3016824-1-xji%40analogixsemi.com patch subject: [PATCH] drm/bridge:anx7625: Enable DSC feature config: i386-buildonly-randconfig-004-20250215 (https://download.01.org/0day-ci/archive/20250215/202502150643.fDWGayDK-lkp@xxxxxxxxx/config) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250215/202502150643.fDWGayDK-lkp@xxxxxxxxx/reproduce) 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 <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202502150643.fDWGayDK-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): ld: drivers/gpu/drm/bridge/analogix/anx7625.o: in function `anx7625_bridge_mode_fixup': >> drivers/gpu/drm/bridge/analogix/anx7625.c:2562: undefined reference to `__udivdi3' >> ld: drivers/gpu/drm/bridge/analogix/anx7625.c:2472: undefined reference to `__udivdi3' vim +2562 drivers/gpu/drm/bridge/analogix/anx7625.c 2440 2441 static bool anx7625_bridge_mode_fixup(struct drm_bridge *bridge, 2442 const struct drm_display_mode *mode, 2443 struct drm_display_mode *adj) 2444 { 2445 struct anx7625_data *ctx = bridge_to_anx7625(bridge); 2446 struct device *dev = ctx->dev; 2447 u32 hsync, hfp, hbp, hblanking; 2448 u32 adj_hsync, adj_hfp, adj_hbp, adj_hblanking, delta_adj; 2449 u32 vref, adj_clock; 2450 2451 DRM_DEV_DEBUG_DRIVER(dev, "drm mode fixup set\n"); 2452 2453 hsync = mode->hsync_end - mode->hsync_start; 2454 hfp = mode->hsync_start - mode->hdisplay; 2455 hbp = mode->htotal - mode->hsync_end; 2456 hblanking = mode->htotal - mode->hdisplay; 2457 2458 dev_dbg(dev, "before mode fixup\n"); 2459 dev_dbg(dev, "hsync(%d), hfp(%d), hbp(%d), clock(%d)\n", 2460 hsync, hfp, hbp, adj->clock); 2461 dev_dbg(dev, "hsync_start(%d), hsync_end(%d), htot(%d)\n", 2462 adj->hsync_start, adj->hsync_end, adj->htotal); 2463 adj_hfp = hfp; 2464 adj_hsync = hsync; 2465 adj_hbp = hbp; 2466 adj_hblanking = hblanking; 2467 2468 if (mode->clock > DSC_PIXEL_CLOCK) { 2469 adj_hsync = DSC_HSYNC_LEN; 2470 adj_hfp = DSC_HFP_LEN; 2471 adj_hbp = DSC_HBP_LEN; > 2472 vref = (u64)adj->clock * 1000 * 1000 / (adj->htotal * adj->vtotal); 2473 goto calculate_timing; 2474 } 2475 2476 /* No need fixup for external monitor */ 2477 if (!ctx->pdata.panel_bridge) 2478 return true; 2479 2480 /* HFP needs to be even */ 2481 if (hfp & 0x1) { 2482 adj_hfp += 1; 2483 adj_hblanking += 1; 2484 } 2485 2486 /* HBP needs to be even */ 2487 if (hbp & 0x1) { 2488 adj_hbp -= 1; 2489 adj_hblanking -= 1; 2490 } 2491 2492 /* HSYNC needs to be even */ 2493 if (hsync & 0x1) { 2494 if (adj_hblanking < hblanking) 2495 adj_hsync += 1; 2496 else 2497 adj_hsync -= 1; 2498 } 2499 2500 /* 2501 * Once illegal timing detected, use default HFP, HSYNC, HBP 2502 * This adjusting made for built-in eDP panel, for the externel 2503 * DP monitor, may need return false. 2504 */ 2505 if (hblanking < HBLANKING_MIN || (hfp < HP_MIN && hbp < HP_MIN)) { 2506 adj_hsync = SYNC_LEN_DEF; 2507 adj_hfp = HFP_HBP_DEF; 2508 adj_hbp = HFP_HBP_DEF; 2509 vref = adj->clock * 1000 / (adj->htotal * adj->vtotal); 2510 if (hblanking < HBLANKING_MIN) { 2511 delta_adj = HBLANKING_MIN - hblanking; 2512 adj_clock = vref * delta_adj * adj->vtotal; 2513 adj->clock += DIV_ROUND_UP(adj_clock, 1000); 2514 } else { 2515 delta_adj = hblanking - HBLANKING_MIN; 2516 adj_clock = vref * delta_adj * adj->vtotal; 2517 adj->clock -= DIV_ROUND_UP(adj_clock, 1000); 2518 } 2519 2520 DRM_WARN("illegal hblanking timing, use default.\n"); 2521 DRM_WARN("hfp(%d), hbp(%d), hsync(%d).\n", hfp, hbp, hsync); 2522 } else if (adj_hfp < HP_MIN) { 2523 /* Adjust hfp if hfp less than HP_MIN */ 2524 delta_adj = HP_MIN - adj_hfp; 2525 adj_hfp = HP_MIN; 2526 2527 /* 2528 * Balance total HBlanking pixel, if HBP does not have enough 2529 * space, adjust HSYNC length, otherwise adjust HBP 2530 */ 2531 if ((adj_hbp - delta_adj) < HP_MIN) 2532 /* HBP not enough space */ 2533 adj_hsync -= delta_adj; 2534 else 2535 adj_hbp -= delta_adj; 2536 } else if (adj_hbp < HP_MIN) { 2537 delta_adj = HP_MIN - adj_hbp; 2538 adj_hbp = HP_MIN; 2539 2540 /* 2541 * Balance total HBlanking pixel, if HBP hasn't enough space, 2542 * adjust HSYNC length, otherwize adjust HBP 2543 */ 2544 if ((adj_hfp - delta_adj) < HP_MIN) 2545 /* HFP not enough space */ 2546 adj_hsync -= delta_adj; 2547 else 2548 adj_hfp -= delta_adj; 2549 } 2550 2551 calculate_timing: 2552 2553 dev_dbg(dev, "after mode fixup\n"); 2554 dev_dbg(dev, "hsync(%d), hfp(%d), hbp(%d), clock(%d)\n", 2555 adj_hsync, adj_hfp, adj_hbp, adj->clock); 2556 2557 /* Reconstruct timing */ 2558 adj->hsync_start = adj->hdisplay + adj_hfp; 2559 adj->hsync_end = adj->hsync_start + adj_hsync; 2560 adj->htotal = adj->hsync_end + adj_hbp; 2561 if (mode->clock > DSC_PIXEL_CLOCK) > 2562 adj->clock = (u64)vref * adj->htotal * adj->vtotal / 1000 / 1000; 2563 2564 dev_dbg(dev, "hsync_start(%d), hsync_end(%d), htot(%d), clock(%d)\n", 2565 adj->hsync_start, adj->hsync_end, adj->htotal, adj->clock); 2566 2567 return true; 2568 } 2569 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
