[U-Boot] [PATCH 47/48] x86: Gracefully disable the vesa driver when running from EFI

[Simon Glass]

We cannot use this driver when running from EFI as we have no direct hardware
access. Coreboot uses a different driver which uses tables provided by
Coreboot. So far it does not seem possible to use a normal video driver when
booting from EFI.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

 drivers/video/vesa_fb.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/video/vesa_fb.c b/drivers/video/vesa_fb.c
index 909f8e8..7a93443 100644
--- a/drivers/video/vesa_fb.c
+++ b/drivers/video/vesa_fb.c
@@ -24,6 +24,14 @@ void *video_hw_init(void)
 	int ret;
 
 	printf("Video: ");
+	if (!ll_boot_init()) {
+		/*
+		 * If we are running from EFI or Coreboot, this driver can't
+		 * work.
+		 */
+		printf("Not available (previous bootloader prevents it)\n");
+		return NULL;
+	}
 	if (vbe_get_video_info(gdev)) {
 		dev = pci_find_class(PCI_CLASS_DISPLAY_VGA << 8, 0);
 		if (dev == -1) {
-- 
2.4.3.573.g4eafbef