baytrail: Enable panel and set timings

Hardware / Coreboot - Duncan Laurie [chromium.org] - 8 May 2014 22:42 UTC

These need to be set before the kernel will work without running the VBIOS option rom.

Also necessary is setting the PP_CONTROL register with the EDP_FORCE_VDD bit.

BUG=chrome-os-partner:24367 BRANCH=none TEST=boot on rambi in normal mode and see the panel come up

Change-Id: I495f818d581d08b80db11785fe28b601ec956b3b

b40e444 baytrail: Enable panel and set timings
src/soc/intel/baytrail/baytrail/gfx.h | 16 +++++++
src/soc/intel/baytrail/chip.h | 25 +++++++++++
src/soc/intel/baytrail/gfx.c | 75 +++++++++++++++++++++++++++++++++
3 files changed, 116 insertions(+)

Upstream: review.coreboot.org

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