diff options
| author | Arthur Heymans <arthur@aheymans.xyz> | 2018-08-09 11:31:51 +0200 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2018-08-22 18:26:14 +0000 |
| commit | e6c8f7ec200e72c76eb2ff73720acff9c88e73c8 (patch) | |
| tree | 1db722038859476c1bb597ebee785bf6d5b1118b /src/northbridge/intel/gm45 | |
| parent | db2f91b1f7924ce3953358045d17d2e328887a6b (diff) | |
nb/intel/*/gma.c: Skip NGI when VGA decode is not enabled
Writes to VGA MEM and IO by NGI are invalid if the IGD is not decoding
them.
Change-Id: I4b9329d14105eb563a0d4aea6ef75ff11febf6df
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/27984
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Diffstat (limited to 'src/northbridge/intel/gm45')
| -rw-r--r-- | src/northbridge/intel/gm45/gma.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/src/northbridge/intel/gm45/gma.c b/src/northbridge/intel/gm45/gma.c index 606170ce73..5335fbb077 100644 --- a/src/northbridge/intel/gm45/gma.c +++ b/src/northbridge/intel/gm45/gma.c @@ -771,11 +771,18 @@ static void gma_func0_init(struct device *dev) /* Post VBIOS init */ gma_pm_init_post_vbios(dev, edid_lvds.ascii_string); - if (IS_ENABLED(CONFIG_MAINBOARD_DO_NATIVE_VGA_INIT)) { - gma_ngi(dev, &edid_lvds); - } else if (IS_ENABLED(CONFIG_MAINBOARD_USE_LIBGFXINIT)) { - int lightup_ok; - gma_gfxinit(&lightup_ok); + int vga_disable = (pci_read_config16(dev, D0F0_GGC) & 2) >> 1; + + if (vga_disable) { + printk(BIOS_INFO, + "IGD is not decoding legacy VGA MEM and IO: skipping NATIVE graphic init\n"); + } else { + if (IS_ENABLED(CONFIG_MAINBOARD_DO_NATIVE_VGA_INIT)) { + gma_ngi(dev, &edid_lvds); + } else if (IS_ENABLED(CONFIG_MAINBOARD_USE_LIBGFXINIT)) { + int lightup_ok; + gma_gfxinit(&lightup_ok); + } } intel_gma_restore_opregion(); |