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authorRonald G. Minnich <rminnich@google.com>2013-04-17 16:57:30 -0700
committerStefan Reinauer <stefan.reinauer@coreboot.org>2013-07-09 22:16:37 +0200
commit4f78b187499d8e1f4a2fe3dad8e0997c91f15762 (patch)
tree26b728417cb204b80b43f3cd76b56dab7d5fad06 /src/mainboard/intel/eagleheights
parent2a66d6b804acd22fddc2e51550ba39d2561c1234 (diff)
fox_wtm2: First step support for coreboot-based graphics startup
This code is the initial version of FUI for haswell and wtm2. The code is simplified from before in many ways. I've gotten rid of the opcode table, because it obscured meaning and I don't think it is needed any more. Register sets, mainly used for reset, are just lines of code -- not many of them. There are a bunch of not-yet-documented registers here; the VBIOS seemed to think they were necessary and testing shows they seem to be right. As a bit of added paranoia, we always include the VBIOS code as our emergency recovery path. You have to run it now anyways, so this is no regression from our current situation; and, if all goes well, in a week (or so), you'll never have to run it again, but like the Force and nose hair, it will be with you always. The code can return in three ways. The first, best way is success: panel is up and the VBIOS need not run. The second mode is that we tried to light up the panel but could not, for some reason, but will return with the panel partly up. In this case, it's ok not to power cycle the panel. The third, worst case, which will NEVER happen, ha ha, is that we have to turn the panel off and wait the required 600ms for it to cycle. Life sucks sometimes. This failure mode is in the 'hang on we're going to fix it' category now that we have ramstage in RW. The Big Goal here is to create something other coreboot ports can use as well. The guys doing the x60 report that the link FUI works, without too many mods, on that chipset, so it seems Intel is keeping things from changing too much over time. Also, again, please note: this and the next 3 versions will ALWAYS fail. The goal is to verify the correctness of the recovery path. The bizarre tab-space formatting in drm_dp_helper.h is from the original, as in i915_reg.h Change-Id: I6ecf454633029d185c29d470980b5a0f3114a8ce Signed-off-by: Ronald G. Minnich <rminnich@google.com> Signed-off-by: Gabe Black <gabeblack@chromium.org> Reviewed-on: http://review.coreboot.org/3635 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
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