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. Digital output is not supported. Change-Id: I11a4dd68746e06c7e27ecf3e765bdd0d8cf40515 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/20890 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
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@ -74,6 +74,15 @@ static void intel_gma_init(const struct northbridge_intel_x4x_config *info,
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u32 pixel_m1 = 1;
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u32 pixel_m2 = 1;
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u8 vga_gmbus = GMBUS_PORT_VGADDC;
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if (IS_ENABLED(CONFIG_GFX_GMA_ANALOG_I2C_HDMI_B))
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vga_gmbus = GMBUS_PORT_DPB;
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else if (IS_ENABLED(CONFIG_GFX_GMA_ANALOG_I2C_HDMI_C))
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vga_gmbus = GMBUS_PORT_DPC;
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else if (IS_ENABLED(CONFIG_GFX_GMA_ANALOG_I2C_HDMI_D))
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vga_gmbus = GMBUS_PORT_DPD;
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vga_gr_write(0x18, 0);
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/* Set up GTT */
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@ -113,7 +122,11 @@ static void intel_gma_init(const struct northbridge_intel_x4x_config *info,
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udelay(1);
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intel_gmbus_read_edid(mmio + GMBUS0, GMBUS_PORT_VGADDC, 0x50, edid_data,
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/*
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* TODO: check if it is actually an analog display.
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* No harm is done but the console output could be confusing.
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*/
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intel_gmbus_read_edid(mmio + GMBUS0, vga_gmbus, 0x50, edid_data,
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sizeof(edid_data));
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intel_gmbus_stop(mmio + GMBUS0);
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decode_edid(edid_data,
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