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northbridge/i945/gma: Re-enable NVRAM tft_brightness 

Commit 71512b2c (northbridge/i945/gma: fix build error with native graphics init)
unintentionally changed the code to ignore the NVRAM setting
`tft_brightness`. Revert that hunk to restore the original behavior.

Change-Id: Iffdfc5272732bad3476f35ddac1f5a7564270531
Signed-off-by: Alexander Couzens <lynxis@fe80.eu>
Reviewed-on: https://review.coreboot.org/14002
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
This commit is contained in:
Alexander Couzens 2016-03-09 10:42:58 +01:00 committed by Martin Roth
parent a2176d8ef6
commit c7a1a3e994
1 changed files with 5 additions and 2 deletions
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7
src/northbridge/intel/i945/gma.c
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@ -465,14 +465,17 @@ static void gma_func0_disable(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_MEMORY | PCI_COMMAND_IO);
/* Permanently set tft_brightness to 0xff. Ignore nvramtool configuration */
pci_write_config8(dev, 0xf4, 0xff);
if (get_option(&val, "tft_brightness") == CB_SUCCESS)
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)