diff options
| author | Simon Glass <sjg@chromium.org> | 2021-11-04 06:09:10 +0300 |
|---|---|---|
| committer | Heinrich Schuchardt <xypron.glpk@gmx.de> | 2021-11-07 20:36:55 +0300 |
| commit | 1834c081d3db78df045f7e243e8bb169c4a12e2e (patch) | |
| tree | 3d2159b6c1a84e7c9cb6e3bebf2aafa774349e60 /drivers | |
| parent | f84457376264913537392a90d7022631af1639b7 (diff) | |
| download | u-boot-1834c081d3db78df045f7e243e8bb169c4a12e2e.tar.xz | |
efi: Add video support to the app
The current EFI video driver only works when running in the stub. In that
case the stub calls boot services (before jumping to U-Boot proper) and
copies the graphics info over to the efi table. This is necessary because
the stub exits boot services before jumping to U-Boot.
The app maintains access to boot services throughout its life, so does not
need to do this. Update the driver to support calling boot services
directly.
Enable video output for the app. Note that this uses the
EFI_GRAPHICS_OUTPUT_PROTOCOL protocol, even though it mentions vesa.
A sample qemu command-line for this case is:
qemu-system-x86_64 -bios /usr/share/edk2.git/ovmf-ia32/OVMF-pure-efi.fd
-drive id=disk,file=try.img,if=none,format=raw -nic none
-device ahci,id=ahci -device ide-hd,drive=disk,bus=ahci.0
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/video/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/video/efi.c | 45 |
2 files changed, 38 insertions, 9 deletions
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig index 2f4650f830..a58f87f479 100644 --- a/drivers/video/Kconfig +++ b/drivers/video/Kconfig @@ -250,7 +250,7 @@ config VIDEO_COREBOOT config VIDEO_EFI bool "Enable EFI framebuffer driver support" - depends on EFI_STUB + depends on EFI_STUB || EFI_APP help Turn on this option to enable a framebuffeer driver when U-Boot is loaded as a payload (see README.u-boot_on_efi) by an EFI BIOS where diff --git a/drivers/video/efi.c b/drivers/video/efi.c index c248bd352a..5f9031f2ec 100644 --- a/drivers/video/efi.c +++ b/drivers/video/efi.c @@ -50,6 +50,28 @@ static void efi_find_pixel_bits(u32 mask, u8 *pos, u8 *size) *size = len; } +static int get_mode_info(struct vesa_mode_info *vesa) +{ + efi_guid_t efi_gop_guid = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID; + struct efi_boot_services *boot = efi_get_boot(); + struct efi_gop_mode *mode; + struct efi_gop *gop; + int ret; + + if (!boot) + return log_msg_ret("sys", -ENOSYS); + ret = boot->locate_protocol(&efi_gop_guid, NULL, (void **)&gop); + if (ret) + return log_msg_ret("prot", -ENOTSUPP); + + mode = gop->mode; + vesa->phys_base_ptr = mode->fb_base; + vesa->x_resolution = mode->info->width; + vesa->y_resolution = mode->info->height; + + return 0; +} + static int save_vesa_mode(struct vesa_mode_info *vesa) { struct efi_entry_gopmode *mode; @@ -57,16 +79,23 @@ static int save_vesa_mode(struct vesa_mode_info *vesa) int size; int ret; - ret = efi_info_get(EFIET_GOP_MODE, (void **)&mode, &size); - if (ret == -ENOENT) { - debug("efi graphics output protocol mode not found\n"); - return -ENXIO; + if (IS_ENABLED(CONFIG_EFI_APP)) { + ret = get_mode_info(vesa); + if (ret) { + printf("EFI graphics output protocol not found\n"); + return -ENXIO; + } + } else { + ret = efi_info_get(EFIET_GOP_MODE, (void **)&mode, &size); + if (ret == -ENOENT) { + printf("EFI graphics output protocol mode not found\n"); + return -ENXIO; + } + vesa->phys_base_ptr = mode->fb_base; + vesa->x_resolution = mode->info->width; + vesa->y_resolution = mode->info->height; } - vesa->phys_base_ptr = mode->fb_base; - vesa->x_resolution = mode->info->width; - vesa->y_resolution = mode->info->height; - if (mode->info->pixel_format < EFI_GOT_BITMASK) { fbinfo = &efi_framebuffer_format_map[mode->info->pixel_format]; vesa->red_mask_size = fbinfo->red.size; |