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| author | Arthur Heymans <arthur@aheymans.xyz> | 2017-06-13 20:57:05 +0200 |
|---|---|---|
| committer | Nico Huber <nico.h@gmx.de> | 2017-06-15 00:35:35 +0200 |
| commit | d65ff229882ef0e3dad27867125cab681c7b7aec (patch) | |
| tree | 13ec0c6574d6ccee4b958c52d924487a6e1cd542 /src/northbridge/intel/gm45/igd.c | |
| parent | 660de34bbf0c9843120ffa2e861d26718e3205e3 (diff) | |
| download | coreboot-d65ff229882ef0e3dad27867125cab681c7b7aec.tar.xz | |
nb/intel/gm45: Don't allow too low values for gfx_uma_size
Too low gfx_uma_size can result in problems if the framebuffer
does not fit.
This partially reverts: 7afcfe0 "gm45: enable setting all vram sizes
from cmos"
Change-Id: I485d24198cb784db5d2cfce0a8646e861a4a1695
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/20194
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Diffstat (limited to 'src/northbridge/intel/gm45/igd.c')
| -rw-r--r-- | src/northbridge/intel/gm45/igd.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/src/northbridge/intel/gm45/igd.c b/src/northbridge/intel/gm45/igd.c index 1164339c8a..45144aae2e 100644 --- a/src/northbridge/intel/gm45/igd.c +++ b/src/northbridge/intel/gm45/igd.c @@ -153,17 +153,16 @@ void igd_compute_ggc(sysinfo_t *const sysinfo) if (!sysinfo->enable_igd || (capid & (1 << (33 - 32)))) sysinfo->ggc = 0x0002; else { - u8 gfxsize; + /* 4 for 32MB, default if not set in cmos */ + u8 gfxsize = 4; /* Graphics Stolen Memory: 2MB GTT (0x0300) when VT-d disabled, 2MB GTT + 2MB shadow GTT (0x0b00) else. */ - if (get_option(&gfxsize, "gfx_uma_size") != CB_SUCCESS) { - /* 4 for 32MB, default if not set in cmos */ - gfxsize = 4; - } + get_option(&gfxsize, "gfx_uma_size"); /* Handle invalid cmos settings */ - if (gfxsize > 12) - gfxsize = 4; + /* Only allow settings between 32MB and 352MB */ + gfxsize = MIN(MAX(gfxsize, 4), 12); + sysinfo->ggc = 0x0300 | ((gfxsize + 1) << 4); if (!(capid & (1 << (48 - 32)))) sysinfo->ggc |= 0x0800; |