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authorArthur Heymans <arthur@aheymans.xyz>2016-08-15 00:04:34 +0200
committerMartin Roth <martinroth@google.com>2016-09-07 18:39:34 +0200
commit8ba2010d126ce7a6d32504bcb2a0e1b231732c0f (patch)
tree5957572a5d1559093021d94492bc5f6eb09a3162 /src/drivers/spi
parente52592078e8e5b24b45197ab510236193656f68e (diff)
gm45/gma.c: clean up some registers
According to "G45: Volume 3: Display Register Intel ® 965G Express Chipset Family and Intel ® G35 Express Chipset Graphics Controller" some registries are set incorrectly in gm45/gma.c. Some values are changed after comparing them with the values the i915 linux kernel (3.13 was used) module sets while modesetting. The values were obtained using 'intel_reg' from intel-gpu-tools, during a normal boot and with 'nomodeset' as a kernel argument. Some registers that don't exist on gm45 are set in gma.c, which is probably the result of copying code from a more recent intel northbridge. The result is that that gm45 laptops with wxga displays still work as before. gm45 laptops with wxga+ or higher resolution now just work, where previously a black screen was shown. TEST: build with native graphic init and flash on a gm45 target, like lenovo x200. Change-Id: If66b60c7189997c558270f9e474851fe7e2219f1 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/16217 Tested-by: build bot (Jenkins) Reviewed-by: Nico Huber <nico.h@gmx.de>
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