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      1 /*	$NetBSD: modelist.c,v 1.1.1.3 2021/09/30 18:50:09 jmcneill Exp $	*/
      2 
      3 #include <efi.h>
      4 #include <efilib.h>
      5 
      6 extern EFI_GUID GraphicsOutputProtocol;
      7 
      8 static void
      9 print_modes(EFI_GRAPHICS_OUTPUT_PROTOCOL *gop)
     10 {
     11 	int i, imax;
     12 	EFI_STATUS rc;
     13 
     14 	if (gop->Mode) {
     15 		imax = gop->Mode->MaxMode;
     16 		Print(L"GOP reports MaxMode %d\n", imax);
     17 	} else {
     18 		Print(L"gop->Mode is NULL\n");
     19 		imax = 1;
     20 	}
     21 
     22 	for (i = 0; i < imax; i++) {
     23 		EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info;
     24 		UINTN SizeOfInfo;
     25 		rc = uefi_call_wrapper(gop->QueryMode, 4, gop, i, &SizeOfInfo,
     26 					&info);
     27 		if (rc == EFI_NOT_STARTED) {
     28 			Print(L"gop->QueryMode() returned %r\n", rc);
     29 			Print(L"Trying to start GOP with SetMode().\n");
     30 			rc = uefi_call_wrapper(gop->SetMode, 2, gop,
     31 				gop->Mode ? gop->Mode->Mode : 0);
     32 			rc = uefi_call_wrapper(gop->QueryMode, 4, gop, i,
     33 				&SizeOfInfo, &info);
     34 		}
     35 
     36 		if (EFI_ERROR(rc)) {
     37 			Print(L"%d: Bad response from QueryMode: %r (%d)\n",
     38 			      i, rc, rc);
     39 			continue;
     40 		}
     41 		Print(L"%c%d: %dx%d ",
     42 		      (gop->Mode &&
     43 		       CompareMem(info,gop->Mode->Info,sizeof(*info)) == 0
     44 		       ) ? '*' : ' ',
     45 		      i, info->HorizontalResolution, info->VerticalResolution);
     46 		switch(info->PixelFormat) {
     47 			case PixelRedGreenBlueReserved8BitPerColor:
     48 				Print(L"RGBR");
     49 				break;
     50 			case PixelBlueGreenRedReserved8BitPerColor:
     51 				Print(L"BGRR");
     52 				break;
     53 			case PixelBitMask:
     54 				Print(L"R:%08x G:%08x B:%08x X:%08x",
     55 					info->PixelInformation.RedMask,
     56 					info->PixelInformation.GreenMask,
     57 					info->PixelInformation.BlueMask,
     58 					info->PixelInformation.ReservedMask);
     59 				break;
     60 			case PixelBltOnly:
     61 				Print(L"(blt only)");
     62 				break;
     63 			default:
     64 				Print(L"(Invalid pixel format)");
     65 				break;
     66 		}
     67 		Print(L" pitch %d\n", info->PixelsPerScanLine);
     68 	}
     69 }
     70 
     71 static EFI_STATUS
     72 SetWatchdog(UINTN seconds)
     73 {
     74 	EFI_STATUS rc;
     75 	rc = uefi_call_wrapper(BS->SetWatchdogTimer, 4, seconds, 0x1ffff,
     76 				0, NULL);
     77 	if (EFI_ERROR(rc)) {
     78 		CHAR16 Buffer[64];
     79 		StatusToString(Buffer, rc);
     80 		Print(L"Bad response from QueryMode: %s (%d)\n", Buffer, rc);
     81 	}
     82 	return rc;
     83 }
     84 
     85 EFI_STATUS
     86 efi_main (EFI_HANDLE image_handle, EFI_SYSTEM_TABLE *systab)
     87 {
     88 	EFI_STATUS rc;
     89 	EFI_GRAPHICS_OUTPUT_PROTOCOL *gop;
     90 
     91 	InitializeLib(image_handle, systab);
     92 
     93 	SetWatchdog(10);
     94 
     95 	rc = LibLocateProtocol(&GraphicsOutputProtocol, (void **)&gop);
     96 	if (EFI_ERROR(rc)) {
     97 		Print(L"Could not locate GOP: %r\n", rc);
     98 		return rc;
     99 	}
    100 
    101 	if (!gop) {
    102 		Print(L"LocateProtocol(GOP, &gop) returned %r but GOP is NULL\n", rc);
    103 		return EFI_UNSUPPORTED;
    104 	}
    105 
    106 	print_modes(gop);
    107 
    108 	SetWatchdog(0);
    109 	return EFI_SUCCESS;
    110 }
    111