Matt DeVillier (matt.devillier@gmail.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/6009
-gerrit
commit b3d508234725d88292a06a8bc175fd3fd3f5f290 Author: Stefan Reinauer reinauer@chromium.org Date: Wed Jan 22 15:16:30 2014 -0800
haswell: Allow pre-graphics delay
Some slow monitors/TVs can't wake up quickly enough for coreboot, so when the VBIOS is run it won't detect them. Hence, add an option to wait for a while before running the VBIOS.
BUG=none BRANCH=panther TEST=Boot to dev mode on one of the systems that exposed the problem and see it go away.
Change-Id: Ib9524f1c7ee08bedf96a6468da8b4ccf712fe0e2 Signed-off-by: Matt DeVillier matt.devillier@gmail.com Signed-off-by: Stefan Reinauer reinauer@google.com Reviewed-on: https://chromium-review.googlesource.com/183545 Reviewed-by: Mohammed Habibulla moch@google.com Reviewed-by: Duncan Laurie dlaurie@chromium.org --- src/northbridge/intel/haswell/Kconfig | 9 +++++++++ src/northbridge/intel/haswell/gma.c | 1 + 2 files changed, 10 insertions(+)
diff --git a/src/northbridge/intel/haswell/Kconfig b/src/northbridge/intel/haswell/Kconfig index 4b15c7b..e8d84d1 100644 --- a/src/northbridge/intel/haswell/Kconfig +++ b/src/northbridge/intel/haswell/Kconfig @@ -107,4 +107,13 @@ config CBFS_SIZE This option allows to limit the size of the CBFS portion in the firmware image.
+config PRE_GRAPHICS_DELAY + int + default 0 + help + On some systems, coreboot boots so fast that connected monitors + (mostly TVs) won't be able to wake up fast enough to talk to the + VBIOS. On those systems we need to wait for a bit before executing + the VBIOS. + endif diff --git a/src/northbridge/intel/haswell/gma.c b/src/northbridge/intel/haswell/gma.c index 0c56f76..95c7b22 100644 --- a/src/northbridge/intel/haswell/gma.c +++ b/src/northbridge/intel/haswell/gma.c @@ -414,6 +414,7 @@ static void gma_func0_init(struct device *dev) #endif if (! lightup_ok) { printk(BIOS_SPEW, "FUI did not run; using VBIOS\n"); + mdelay(CONFIG_PRE_GRAPHICS_DELAY); pci_dev_init(dev); }