video: Fix video on coreboot with the copy buffer

The copy buffer, if enabled, prevents booting from coreboot correctly,
since no memory is allocated for it. Allow it to fall back to disabled
in this situation. This ensures that a console is displayed, even if
it is slow.

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

diff --git a/drivers/pci/pci_rom.c b/drivers/pci/pci_rom.c
index a14a4db3c2f17448fc82935fa7b5b9213bafbf88..7bad4c82c0cab35f3280b8742cdc9833201ea7bd 100644 (file)
--- a/drivers/pci/pci_rom.c
+++ b/drivers/pci/pci_rom.c
@@ -349,13 +349,10 @@ int vbe_setup_video_priv(struct vesa_mode_info *vesa,
        }
 
        /* Use double buffering if enabled */
-       if (IS_ENABLED(CONFIG_VIDEO_COPY)) {
-               if (!plat->base)
-                       return log_msg_ret("copy", -ENFILE);
+       if (IS_ENABLED(CONFIG_VIDEO_COPY) && plat->base)
                plat->copy_base = vesa->phys_base_ptr;
-       } else {
+       else
                plat->base = vesa->phys_base_ptr;
-       }
        log_debug("base = %lx, copy_base = %lx\n", plat->base, plat->copy_base);
        plat->size = vesa->bytes_per_scanline * vesa->y_resolution;