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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:35:18 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:35:18 +0000 |
commit | b750101eb236130cf056c675997decbac904cc49 (patch) | |
tree | a5df1a06754bdd014cb975c051c83b01c9a97532 /src/boot/efi/graphics.c | |
parent | Initial commit. (diff) | |
download | systemd-upstream.tar.xz systemd-upstream.zip |
Adding upstream version 252.22.upstream/252.22upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/boot/efi/graphics.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/src/boot/efi/graphics.c b/src/boot/efi/graphics.c new file mode 100644 index 0000000..dc646bc --- /dev/null +++ b/src/boot/efi/graphics.c @@ -0,0 +1,43 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ +/* + * Copyright © 2013 Intel Corporation + * Authored by Joonas Lahtinen <joonas.lahtinen@linux.intel.com> + */ + +#include <efi.h> +#include <efilib.h> + +#include "graphics.h" +#include "missing_efi.h" +#include "util.h" + +EFI_STATUS graphics_mode(bool on) { + EFI_CONSOLE_CONTROL_PROTOCOL *ConsoleControl = NULL; + EFI_CONSOLE_CONTROL_SCREEN_MODE new; + EFI_CONSOLE_CONTROL_SCREEN_MODE current; + BOOLEAN uga_exists; + BOOLEAN stdin_locked; + EFI_STATUS err; + + err = BS->LocateProtocol((EFI_GUID *) EFI_CONSOLE_CONTROL_GUID, NULL, (void **) &ConsoleControl); + if (err != EFI_SUCCESS) + /* console control protocol is nonstandard and might not exist. */ + return err == EFI_NOT_FOUND ? EFI_SUCCESS : err; + + /* check current mode */ + err =ConsoleControl->GetMode(ConsoleControl, ¤t, &uga_exists, &stdin_locked); + if (err != EFI_SUCCESS) + return err; + + /* do not touch the mode */ + new = on ? EfiConsoleControlScreenGraphics : EfiConsoleControlScreenText; + if (new == current) + return EFI_SUCCESS; + + err =ConsoleControl->SetMode(ConsoleControl, new); + + /* some firmware enables the cursor when switching modes */ + ST->ConOut->EnableCursor(ST->ConOut, false); + + return err; +} |