nitrocaster boards are hard to find nowadays and i'm not
comfortable supporting the knockoff chinese gear; quality
varies greatly, and i can't know how reliable they are.

nitrocaster has been out of business so it's just not
viable to support this mod anymore. in fact, keeping the
eDP-based targets is a liability to libreboot.

regular x220/x230 (non-eDP-modded) are retained. the eDP
modkit from nitrocaster let you use eDP screens instead
of lvds, on thinkpad x220 and x230, letting you use
higher resolution screens.

older lbmk revs can still be used, if you happen to come
across one of these boards. i only recommend using the
official nitrocaster board, if youcan find one unused.

ymmv with the chinese gear. better just use an unmodded
x230 or get a different machine.

Signed-off-by: Leah Rowe <leah@libreboot.org>

Signed-off-by: Leah Rowe <leah@libreboot.org>

broadwell mrc enables both igpu and dgpu to be enabled
at any given time. if the onboard (intel) gpu is set as
primary, the logic to disable it is not executed within
coreboot; instead, the igpu is used for vga decode.

on some t440p/w541 thinkpads, both an intel and nvidia
gpu are present. in this setup, the intel gpu must be
used for vga, and all output, but rendering can be
offloaded to the nvidia gpu (nvidia optimus).

optimus would never work on haswell mrc.bin, because it
always disables the igpu when a dgpu is present, so a hack
exists in coreboot that hides the dgpu from mrc, so that the
igpu remains enabled. broadwell mrc doesn't do this, so the
option to hide PEG devices has been disabled in these
configs.

the broadwell mrc has better peg device handling, and can
support 16gb modules on broadwell hardware; it may well
support these modules on haswell hardware too, though ddr3
sodimms are very hard to find (and expensive). (and currently
untested, with this patch)

Signed-off-by: Leah Rowe <leah@libreboot.org>

broadwell mrc has better peg handling and can support 16gb
modules on broadwell machines - the blob can be used on haswell
machines too, instead of haswell mrc, and it might support 16gb
modules on these machines (not yet tested, but using broadwell
mrc does at least boot as reliably as haswell mrc anyway)

one little quirk with haswell mrc is that it actually handles
vga decode, disabling the igpu entirely, when a dgpu is used.
the broadwell mrc enables both GPUs and does not handle vga
decoding, so we must handle this the usual way; my patch for
this was merged upstream and i'm also adding it to libreboot,
which currently uses an older coreboot revision. this is needed
for dgpu to work. see patch:

0040-nb-haswell-Disable-iGPU-when-dGPU-is-used.patch

broadwell mrc may also make dealing with nvidia optimus setups
more reliable, on laptops that have nvidia GPUs, but this patch
does not add bmrc configs for t440p/w541

NOTE: on t440p/w541 laptops with nvidia graphics, the video output
is wired to intel but rendering can be offloaded to nvidia. in this
setup, we want vga decode to be done on intel, so i've set these
configs to enable CONFIG_ONBOARD_VGA_IS_PRIMARY (set it to y)

Signed-off-by: Leah Rowe <leah@libreboot.org>

Signed-off-by: Nicholas Chin <nic.c3.14@gmail.com>

the current entry is fine, but it would then not support
other configs of different flash sizes, unless they are
explicitly defined.

Signed-off-by: Leah Rowe <leah@libreboot.org>

Signed-off-by: Leah Rowe <leah@libreboot.org>

Reviewed-on: https://codeberg.org/libreboot/lbmk/pulls/187

Iru Cai's port from Gerrit:
https://review.coreboot.org/c/coreboot/+/39398

Now with the proper MXM structure, which removes the 30 second POST
delay. Tested with i7-2670QM, Quadro 2000M and 32GB RAM.

Signed-off-by: Riku Viitanen <riku.viitanen@protonmail.com>

Tested by Minimum_Baseball_629 on Reddit

Signed-off-by: Nicholas Chin <nic.c3.14@gmail.com>