gma i2c: Make I2C port for VGA displays a config option
Boards with a DVI-I connector share the I2C pins for both analog and
digital displays. In that case, the EDID for a VGA display has to be
read over the I2C interface of the coupled digital port.
TEST=Booted kontron/ktqm77 with DVI-I to VGA cable. Display is detected
and enabled (but doesn't show anything, yet?).
Change-Id: I5c4f77d5ad1927f075877a3719361ed2193f4c39
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/17086
Tested-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
diff --git a/configs/ivybridge_lvds b/configs/ivybridge_lvds
index 6a77aea..930a009 100644
--- a/configs/ivybridge_lvds
+++ b/configs/ivybridge_lvds
@@ -1,4 +1,5 @@
CONFIG_GFX_GMA_CPU = Ivybridge
CONFIG_GFX_GMA_CPU_VARIANT = Normal
CONFIG_GFX_GMA_INTERNAL_PORT = LVDS
+CONFIG_GFX_GMA_ANALOG_I2C_PORT = PCH_DAC
CONFIG_GFX_GMA_DEFAULT_MMIO = 16#e000_0000#