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2024-11-20U-Boot x86: Avoid clearing the VESA displayLeah Rowe
This is a patch from Simon Glass. U-Boot clears the display when it starts up, but was asking the VESA driver to do the same, needlessly; this patch avoids the latter. A further patch is also included, which provides a better message when jumping into long mode on the SPL (64-bit) target, dumping it on the serial console instead of using printf. Signed-off-by: Leah Rowe <leah@libreboot.org>
2024-11-19u-boot x86 serial/ns16550: disable UART as neededLeah Rowe
U-Boot was hanging on hardware, but not Qemu. This is because on the machines tested, namely the X200 and E6230 laptops supported in Libreboot, the UART was disabled from coreboot. This U-Boot patch from Simon Glass works around the issue by silently disabling the UART when it isn't there. Instead, output is sent to the display and U-Boot no longer hangs. Signed-off-by: Leah Rowe <leah@libreboot.org>