Same with TianoCore apparently.

Patch sent. U-Boot was calculating the line length but needs to use what it is given from coreboot.

http://patchwork.ozlabs.org/patch/1005675/

Not sure about Tianocore but it probably has a similar problem.

Patch accepted, so brought in this CL

https://chromium-review.googlesource.com/c/chromiumos/third_party/u-boot/+/1366597

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/third_party/u-boot/+/8084afd71b2989bbb1988488fcb1764202f79b2b

commit 8084afd71b2989bbb1988488fcb1764202f79b2b
Author: Simon Glass <sjg@chromium.org>
Date: Tue Dec 11 00:00:39 2018

UPSTREAM: video: Allow driver to specify the line length

At present line_length is always calculated in video_post_probe(). But
some hardware may use a different line length, e.g. with a 1366-wide
display.

Allow the driver to set this value if needed.

BUG= chromium:903818 
TEST=build and boot on careena; see that display is good now
Reviewed-by: Anatolij Gustschin <agust@denx.de>
Change-Id: I66e1cffc055e84d40c47ac1ed701127bcb4f57cc
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1366597
Reviewed-by: Raul E Rangel <rrangel@chromium.org>

[modify] https://crrev.com/8084afd71b2989bbb1988488fcb1764202f79b2b/drivers/video/video-uclass.c
[modify] https://crrev.com/8084afd71b2989bbb1988488fcb1764202f79b2b/drivers/pci/pci_rom.c
[modify] https://crrev.com/8084afd71b2989bbb1988488fcb1764202f79b2b/include/video.h

This is applied upstream. I am not going to venture into tianocore though.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/third_party/u-boot/+/6b2672298d0d836879c0ba680575190867c1843b

commit 6b2672298d0d836879c0ba680575190867c1843b
Author: Simon Glass <sjg@chromium.org>
Date: Wed Dec 19 16:37:08 2018

UPSTREAM: video: Allow driver to specify the line length

At present line_length is always calculated in video_post_probe(). But
some hardware may use a different line length, e.g. with a 1366-wide
display.

Allow the driver to set this value if needed.

BUG= chromium:903818 
TEST=build and boot on careena; see that display is good now
Reviewed-by: Anatolij Gustschin <agust@denx.de>
Change-Id: I66e1cffc055e84d40c47ac1ed701127bcb4f57cc
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1366597
Reviewed-by: Raul E Rangel <rrangel@chromium.org>
(cherry picked from commit 8084afd71b2989bbb1988488fcb1764202f79b2b)
Reviewed-on: https://chromium-review.googlesource.com/c/1384584

[modify] https://crrev.com/6b2672298d0d836879c0ba680575190867c1843b/drivers/video/video-uclass.c
[modify] https://crrev.com/6b2672298d0d836879c0ba680575190867c1843b/drivers/pci/pci_rom.c
[modify] https://crrev.com/6b2672298d0d836879c0ba680575190867c1843b/include/video.h