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Display efi framebuffer dimensions on boot

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The EFI framebuffer produces corrupted output on certain systems.  For
now display the framebuffer parameters (address, dimensions, etc.) on
boot to aid in tracking down these issues.

Sponsored by:	The FreeBSD Foundation
This commit is contained in:
Ed Maste
2014-07-03 17:53:28 +00:00
parent e099b3a948
commit b560f3ffa1
1 changed files with 8 additions and 1 deletions
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sys/boot/amd64/efi/bootinfo.c
+8 -1
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@@ -225,8 +225,15 @@ bi_load_efi_data(struct preloaded_file *kfp)
struct efi_map_header *efihdr;
struct efi_fb efifb;
if (efi_find_framebuffer(&efifb) == 0)
if (efi_find_framebuffer(&efifb) == 0) {
printf("EFI framebuffer information:\n");
printf("addr, size 0x%lx, 0x%lx\n", efifb.fb_addr, efifb.fb_size);
printf("dimensions %d x %d\n", efifb.fb_width, efifb.fb_height);
printf("stride %d\n", efifb.fb_stride);
printf("masks 0x%08x, 0x%08x, 0x%08x, 0x%08x\n", efifb.fb_mask_red, efifb.fb_mask_green, efifb.fb_mask_blue, efifb.fb_mask_reserved);
file_addmetadata(kfp, MODINFOMD_EFI_FB, sizeof(efifb), &efifb);
}
efisz = (sizeof(struct efi_map_header) + 0xf) & ~0xf;