i945 GMA: restore tft brightness from cmos

[coreboot.git] / src / northbridge / intel / i945 / gma.c

diff --git a/src/northbridge/intel/i945/gma.c b/src/northbridge/intel/i945/gma.c
index a43ef259aa9d386af91d9bfe78f45ac577212fc2..340ddcd3a1d09172749bc05757c803813acf2c50 100644 (file)
--- a/src/northbridge/intel/i945/gma.c
+++ b/src/northbridge/intel/i945/gma.c
@@ -21,6 +21,7 @@
 #include <device/device.h>
 #include <device/pci.h>
 #include <device/pci_ids.h>
+#include <pc80/mc146818rtc.h>
 
 static void gma_func0_init(struct device *dev)
 {
@@ -36,11 +37,17 @@ static void gma_func0_init(struct device *dev)
 static void gma_func1_init(struct device *dev)
 {
        u32 reg32;
+       u8 val;
 
        /* IGD needs to be Bus Master, also enable IO accesss */
        reg32 = pci_read_config32(dev, PCI_COMMAND);
        pci_write_config32(dev, PCI_COMMAND, reg32 |
                        PCI_COMMAND_MASTER | PCI_COMMAND_IO);
+
+       if (!get_option(&val, "tft_brightness"))
+               pci_write_config8(dev, 0xf4, val);
+       else
+               pci_write_config8(dev, 0xf4, 0xff);
 }
 
 static void gma_set_subsystem(device_t dev, unsigned vendor, unsigned device)