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i945/gma.c: Generate fake VBT 

This generates a fake VBT for the Intel i945 graphic device. i945
supports both the mobile chipset 945gm (calistoga) and the desktop
chipset 945gc (lakeport), which is why a VBT with a different id string
needs to be created for each target.

The VBT id string is obtained from the vbios blob in the following way:
"strings vbios.bin | grep VBT".

Change-Id: I8245b12b16a4426efbe1f584d4163fc257231a98
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/16530
Tested-by: build bot (Jenkins)
Reviewed-by: Damien Zammit <damien@zamaudio.com>
Reviewed-by: Nico Huber <nico.h@gmx.de>
This commit is contained in:
Arthur Heymans 2016-09-07 22:10:57 +02:00 committed by Nico Huber
parent d3284a6977
commit 333176e5d3
1 changed files with 9 additions and 0 deletions
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9
src/northbridge/intel/i945/gma.c
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@ -433,6 +433,15 @@ static void gma_func0_init(struct device *dev)
iobase, mmiobase, graphics_base);
if (err == 0)
gfx_set_init_done(1);
/* Linux relies on VBT for panel info. */
if (CONFIG_NORTHBRIDGE_INTEL_SUBTYPE_I945GM) {
generate_fake_intel_oprom(&conf->gfx, dev,
"$VBT CALISTOGA");
}
if (CONFIG_NORTHBRIDGE_INTEL_SUBTYPE_I945GC) {
generate_fake_intel_oprom(&conf->gfx, dev,
"$VBT LAKEPORT-G");
}
#endif
}