1/* $NetBSD: efigop.c,v 1.3 2022/08/14 11:26:41 jmcneill Exp $ */ 2 3/*- 4 * Copyright (c) 2021 Jared McNeill <jmcneill@invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29#include "efiboot.h" 30 31static EFI_GRAPHICS_OUTPUT_PROTOCOL *gop = NULL; 32 33void 34efi_gop_probe(void) 35{ 36 EFI_HANDLE *gop_handle; 37 UINTN ngop_handle; 38 EFI_STATUS status; 39 40 status = LibLocateHandle(ByProtocol, &GraphicsOutputProtocol, NULL, 41 &ngop_handle, &gop_handle); 42 if (EFI_ERROR(status) || ngop_handle == 0) { 43 return; 44 } 45 46 for (size_t n = 0; n < ngop_handle; n++) { 47 status = uefi_call_wrapper(BS->HandleProtocol, 3, 48 gop_handle[n], &GraphicsOutputProtocol, (void **)&gop); 49 if (EFI_ERROR(status) || gop->Mode == NULL) { 50 gop = NULL; 51 continue; 52 } else { 53 break; 54 } 55 } 56} 57 58static uint32_t 59efi_gop_bpp(EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info) 60{ 61 if (info->PixelFormat == PixelRedGreenBlueReserved8BitPerColor || 62 info->PixelFormat == PixelBlueGreenRedReserved8BitPerColor) { 63 return 24; 64 } 65 66 return popcount32(info->PixelInformation.RedMask) + 67 popcount32(info->PixelInformation.GreenMask) + 68 popcount32(info->PixelInformation.BlueMask); 69} 70 71static void 72efi_gop_printmode(UINT32 mode, EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info) 73{ 74 char buf[sizeof("NNNNN: HHHHHxVVVVV BB")]; 75 76 snprintf(buf, sizeof(buf), "%-5u: %ux%u %u", mode, 77 info->HorizontalResolution, info->VerticalResolution, 78 efi_gop_bpp(info)); 79 80 printf("%-21s", buf); 81} 82 83void 84efi_gop_show(void) 85{ 86 if (gop == NULL) { 87 return; 88 } 89 90 command_printtab("GOP", ""); 91 efi_gop_printmode(gop->Mode->Mode, gop->Mode->Info); 92 if (gop->Mode->FrameBufferBase != 0) { 93 printf(" (0x%lx,0x%lx)", 94 (unsigned long)gop->Mode->FrameBufferBase, 95 (unsigned long)gop->Mode->FrameBufferSize); 96 } 97 printf("\n"); 98} 99 100void 101efi_gop_dump(void) 102{ 103 EFI_STATUS status; 104 EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info; 105 UINTN size; 106 107 if (gop == NULL) { 108 return; 109 } 110 111 for (UINT32 mode = 0; mode < gop->Mode->MaxMode; mode++) { 112 status = uefi_call_wrapper(gop->QueryMode, 4, gop, mode, 113 &size, &info); 114 if (EFI_ERROR(status)) { 115 continue; 116 } 117 if (mode == gop->Mode->Mode) { 118 printf(" -> "); 119 } else { 120 printf(" "); 121 } 122 efi_gop_printmode(mode, info); 123 if (mode != gop->Mode->MaxMode - 1 && 124 mode % 3 == 2) { 125 printf("\n"); 126 } 127 } 128 printf("\n"); 129} 130 131void 132efi_gop_setmode(UINT32 mode) 133{ 134 EFI_STATUS status; 135 136 if (gop == NULL) { 137 return; 138 } 139 140 status = uefi_call_wrapper(gop->SetMode, 2, gop, mode); 141 if (EFI_ERROR(status)) { 142 printf("Failed to set video mode: %ld\n", (long)status); 143 } 144} 145