northbridge/intel/gm45/gma: Add backlight control register field
This allows the backlight control register to be set via devicetree.cb Change-Id: I32b42dfc1cc609fb6f8995c6158c85be67633770 Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com> Reviewed-on: http://review.coreboot.org/9330 Tested-by: build bot (Jenkins)
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@ -291,6 +291,7 @@ struct i915_gpu_controller_info
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int lvds_dual_channel;
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int link_frequency_270_mhz;
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int lvds_num_lanes;
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u32 backlight;
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};
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int i915lightup(unsigned int physbase, unsigned int mmio,
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@ -446,12 +446,13 @@ static void gma_func0_init(struct device *dev)
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/* Init graphics power management */
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gtt_res = find_resource(dev, PCI_BASE_ADDRESS_0);
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struct northbridge_intel_gm45_config *conf = dev->chip_info;
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#if !CONFIG_MAINBOARD_DO_NATIVE_VGA_INIT
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/* PCI Init, will run VBIOS */
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pci_dev_init(dev);
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#else
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u32 physbase;
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struct northbridge_intel_gm45_config *conf = dev->chip_info;
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struct resource *lfb_res;
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struct resource *pio_res;
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@ -475,7 +476,10 @@ static void gma_func0_init(struct device *dev)
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/* Post VBIOS init */
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/* Enable Backlight */
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gtt_write(BLC_PWM_CTL2, (1 << 31));
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if (conf->gfx.backlight == 0)
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gtt_write(BLC_PWM_CTL, 0x06100610);
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else
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gtt_write(BLC_PWM_CTL, conf->gfx.backlight);
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}
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static void gma_set_subsystem(device_t dev, unsigned vendor, unsigned device)
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