Change in coreboot[master]: nb/intel/x4x/gma.c: Probe VGA EDID on DVI-I ports

[Arthur Heymans (Code Review)]

Arthur Heymans has uploaded this change for review. ( https://review.coreboot.org/20890

Change subject: nb/intel/x4x/gma.c: Probe VGA EDID on DVI-I ports
......................................................................

nb/intel/x4x/gma.c: Probe VGA EDID on DVI-I ports

This allows the use of the native VGA init on boards featuring DVI-I
ports.

TODO: check if the display is actually an analog display.

Change-Id: I11a4dd68746e06c7e27ecf3e765bdd0d8cf40515
Signed-off-by: Arthur Heymans 
---
M src/northbridge/intel/x4x/gma.c
1 file changed, 11 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/90/20890/1

diff --git a/src/northbridge/intel/x4x/gma.c b/src/northbridge/intel/x4x/gma.c
index e91d778..a71ef83 100644
--- a/src/northbridge/intel/x4x/gma.c
+++ b/src/northbridge/intel/x4x/gma.c
@@ -74,6 +74,15 @@
    u32 pixel_m1 = 1;
    u32 pixel_m2 = 1;

+	vga_gmbus = GMBUS_PORT_VGADDC;
+
+	if (IS_ENABLED(GFX_GMA_ANALOG_I2C_HDMI_B))
+		vga_gmbus = GMBUS_PORT_DPB;
+	else if (IS_ENABLED(GFX_GMA_ANALOG_I2C_HDMI_C))
+		vga_gmbus = GMBUS_PORT_DPC;
+	else if (IS_ENABLED(GFX_GMA_ANALOG_I2C_HDMI_D))
+		vga_gmbus = GMBUS_PORT_DPD;
+
    vga_gr_write(0x18, 0);

/* Set up GTT */
@@ -113,7 +122,8 @@

udelay(1);

-	intel_gmbus_read_edid(mmio + GMBUS0, GMBUS_PORT_VGADDC, 0x50, edid_data,
+	/* FIXME: check if it is actually an analog display */
+	intel_gmbus_read_edid(mmio + GMBUS0, vga_gmbus, 0x50, edid_data,
    		sizeof(edid_data));
    intel_gmbus_stop(mmio + GMBUS0);
    decode_edid(edid_data,