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authorArthur Heymans <arthur@aheymans.xyz>2016-05-19 15:34:49 +0200
committerMartin Roth <martinroth@google.com>2016-06-04 23:40:24 +0200
commit7afcfe0f9f78ef8d5029e90304a34caf07d14588 (patch)
tree0be6fbcb456035caa8dab01bc041fc4e1c4345ef /src/mainboard/lenovo/t400
parent90e63deebaf22a73c501c97a47ff72577a09ead6 (diff)
downloadcoreboot-7afcfe0f9f78ef8d5029e90304a34caf07d14588.tar.xz
gm45: enable setting all vram sizes from cmos
Setting the size of the preallocated memory for the igd is done using a cmos parameter, gfx_uma_size. This was limited to a subset of all available sizes, that were already implemented elsewhere in the northbridge code. What this does is change the cmos parameter to 4 bits instead of 3 bits to accomodate all vram sizes. It also adds a sane default of 32mb that already was in place. The northbridge code that reads this cmos parameter is also changed for this new cmos settings. 352M is disabled since it causes issues on systems with 4GB or more ram. TEST: Build, flash target. Clear cmos by corrupting the checksum (nvramtool -c something). Set a desired value in gfx_uma_size using nvramtool. "dmesg | grep stolen" to see what is actually allocated. Change-Id: Ia6479d03f1abe6d0c94bd7264365505e8f8eaeec Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/14900 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Diffstat (limited to 'src/mainboard/lenovo/t400')
-rw-r--r--src/mainboard/lenovo/t400/cmos.default3
-rw-r--r--src/mainboard/lenovo/t400/cmos.layout20
2 files changed, 15 insertions, 8 deletions
diff --git a/src/mainboard/lenovo/t400/cmos.default b/src/mainboard/lenovo/t400/cmos.default
index 98ce970278..5cf3e63aea 100644
--- a/src/mainboard/lenovo/t400/cmos.default
+++ b/src/mainboard/lenovo/t400/cmos.default
@@ -13,4 +13,5 @@ sticky_fn=Disable
power_management_beeps=Enable
low_battery_beep=Enable
sata_mode=AHCI
-hybrid_graphics_mode=Integrated Only \ No newline at end of file
+hybrid_graphics_mode=Integrated Only
+gfx_uma_size=32M \ No newline at end of file
diff --git a/src/mainboard/lenovo/t400/cmos.layout b/src/mainboard/lenovo/t400/cmos.layout
index b0131f6d0b..b4b77665f0 100644
--- a/src/mainboard/lenovo/t400/cmos.layout
+++ b/src/mainboard/lenovo/t400/cmos.layout
@@ -77,8 +77,8 @@ entries
940 1 e 1 uwb
# coreboot config options: northbridge
-941 3 e 11 gfx_uma_size
944 2 e 12 hybrid_graphics_mode
+946 4 e 11 gfx_uma_size
# coreboot config options: EC
952 8 h 0 volume
@@ -127,12 +127,18 @@ enumerations
9 1 Primary
10 0 AHCI
10 1 Compatible
-11 0 32M
-11 1 48M
-11 2 64M
-11 3 128M
-11 5 96M
-11 6 160M
+11 0 1M
+11 1 4M
+11 2 8M
+11 3 16M
+11 4 32M
+11 5 48M
+11 6 64M
+11 7 128M
+11 8 256M
+11 9 96M
+11 10 160M
+11 11 224M
12 0 Integrated Only
12 1 Discrete Only