/* $NetBSD: efigop.c,v 1.3 2022/08/14 11:26:41 jmcneill Exp $ */
/*-
* Copyright (c) 2021 Jared McNeill <
[email protected]>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "efiboot.h"
static EFI_GRAPHICS_OUTPUT_PROTOCOL *gop = NULL;
void
efi_gop_probe(void)
{
EFI_HANDLE *gop_handle;
UINTN ngop_handle;
EFI_STATUS status;
status = LibLocateHandle(ByProtocol, &GraphicsOutputProtocol, NULL,
&ngop_handle, &gop_handle);
if (EFI_ERROR(status) || ngop_handle == 0) {
return;
}
for (size_t n = 0; n < ngop_handle; n++) {
status = uefi_call_wrapper(BS->HandleProtocol, 3,
gop_handle[n], &GraphicsOutputProtocol, (void **)&gop);
if (EFI_ERROR(status) || gop->Mode == NULL) {
gop = NULL;
continue;
} else {
break;
}
}
}
static uint32_t
efi_gop_bpp(EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info)
{
if (info->PixelFormat == PixelRedGreenBlueReserved8BitPerColor ||
info->PixelFormat == PixelBlueGreenRedReserved8BitPerColor) {
return 24;
}
return popcount32(info->PixelInformation.RedMask) +
popcount32(info->PixelInformation.GreenMask) +
popcount32(info->PixelInformation.BlueMask);
}
static void
efi_gop_printmode(UINT32 mode, EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info)
{
char buf[sizeof("NNNNN: HHHHHxVVVVV BB")];
snprintf(buf, sizeof(buf), "%-5u: %ux%u %u", mode,
info->HorizontalResolution, info->VerticalResolution,
efi_gop_bpp(info));
printf("%-21s", buf);
}
void
efi_gop_show(void)
{
if (gop == NULL) {
return;
}
command_printtab("GOP", "");
efi_gop_printmode(gop->Mode->Mode, gop->Mode->Info);
if (gop->Mode->FrameBufferBase != 0) {
printf(" (0x%lx,0x%lx)",
(unsigned long)gop->Mode->FrameBufferBase,
(unsigned long)gop->Mode->FrameBufferSize);
}
printf("\n");
}
void
efi_gop_dump(void)
{
EFI_STATUS status;
EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info;
UINTN size;
if (gop == NULL) {
return;
}
for (UINT32 mode = 0; mode < gop->Mode->MaxMode; mode++) {
status = uefi_call_wrapper(gop->QueryMode, 4, gop, mode,
&size, &info);
if (EFI_ERROR(status)) {
continue;
}
if (mode == gop->Mode->Mode) {
printf(" -> ");
} else {
printf(" ");
}
efi_gop_printmode(mode, info);
if (mode != gop->Mode->MaxMode - 1 &&
mode % 3 == 2) {
printf("\n");
}
}
printf("\n");
}
void
efi_gop_setmode(UINT32 mode)
{
EFI_STATUS status;
if (gop == NULL) {
return;
}
status = uefi_call_wrapper(gop->SetMode, 2, gop, mode);
if (EFI_ERROR(status)) {
printf("Failed to set video mode: %ld\n", (long)status);
}
}
