doc: coreboot: Update stale graphics enabling instructions
With latest coreboot (e.g.: v4.22.01), the instructions to enable
graphics support has changed. Refresh the doc.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/doc/board/coreboot/coreboot.rst b/doc/board/coreboot/coreboot.rst
index 10a251c..7154f59 100644
--- a/doc/board/coreboot/coreboot.rst
+++ b/doc/board/coreboot/coreboot.rst
@@ -32,10 +32,9 @@
If you want to use ELF as the coreboot payload, change U-Boot configuration to
use CONFIG_OF_EMBED instead of CONFIG_OF_SEPARATE.
-To enable video you must enable these options in coreboot:
+To enable video you must enable CONFIG_GENERIC_LINEAR_FRAMEBUFFER in coreboot:
- - Set framebuffer graphics resolution (1280x1024 32k-color (1:5:5))
- - Keep VESA framebuffer
+ - Devices->Display->Framebuffer mode->Linear "high resolution" framebuffer
At present it seems that for Minnowboard Max, coreboot does not pass through
the video information correctly (it always says the resolution is 0x0). This
@@ -184,13 +183,13 @@
To update the `coreboot.rom` file which is used:
-#. Build coreboot with `CONFIG_LINEAR_FRAMEBUFFER=y`. If using `make menuconfig`
- this is under
- `Devices ->Display->Framebuffer mode->Linear "high resolution" framebuffer`.
+#. Build coreboot with `CONFIG_GENERIC_LINEAR_FRAMEBUFFER=y`. If using
+ `make menuconfig`, this is under
+ `Devices->Display->Framebuffer mode->Linear "high resolution" framebuffer`.
#. Compress the resulting `coreboot.rom`::
- xz -c /path/to/coreboot/build/coreboot.rom >coreboot.rom.xz
+ xz -c /path/to/coreboot/build/coreboot.rom > coreboot.rom.xz
#. Upload the file to Google drive