The CHECK_REV_IN_OPROM_NAME Kconfig option was introduced to solve the
problem of the PCI VID/DID combination of the Picasso iGPU not being
sufficient information to know which VGA BIOS file to run, so a new
function that additionally checks the PCI revision of that device was
introduced. Later it turned out that there might be a case where even
that isn't sufficient, so the soc_is_raven2() function is used in the
remap function to always use the correct VBIOS file.
Picasso is the only SoC that selected the CHECK_REV_IN_OPROM_NAME
Kconfig option, so all other SoCs are unaffected by this change.
Now that we use the VBIOS images with only the PCI VID and DID in the
CBFS file name for Picasso, SeaBIOS will find the VBIOS with the same ID
as the iGPU in CBFS and we don't need the workaround to add a third
VBIOS image via VGA_BIOS_DGPU_* that has the name that SeaBIOS expects.
This will result in SeaBIOS now running the VBIOS that has the same PCI
VID/DID as the hardware which will be the wrong one in the RV2 silicon
showing the PCO silicon PCI VID/DID, but that was also the case with the
VGA_BIOS_DGPU_* workaround where the board's Kconfig just selected one
of the two possible images during build time and hoped that it was the
correct one for that actual hardware. The only board where this patch
might cause a regression compared to the old behavior is the AMD Cereme
reference board with Pollock APU, but I'm not even sure if any coreboot
developer still has one of those boards, so I'm willing to accept that.
To properly solve the problem with SeaBIOS using the correct VBIOS file
in all cases, we'd need to generate that info during coreboot runtime
and somehow pass it to SeaBIOS, but that's out of scope for this patch.
TEST=On Mandolin with PCO silicon, the display output in both SeaBIOS
and Ubuntu still works. Booting Windows 10 via the pre-built EDK2
payload that I'm using also resulted in the display output working.
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: Ia6de533c536044698d85404427719b8f534870fa
Reviewed-on: https://review.coreboot.org/c/coreboot/+/82598
Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
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