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From 35db725ce978d57975b716ce6590caff9494a4fc Mon Sep 17 00:00:00 2001
From: Arthur Heymans <arthur@aheymans.xyz>
Date: Thu, 19 May 2016 15:34:49 +0200
Subject: [PATCH] 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.
The northbridge code that reads this cmos parameter is
also changed for this new cmos settings.
352M is disabled since it often causes issues 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>
diff --git a/src/mainboard/lenovo/t400/cmos.default b/src/mainboard/lenovo/t400/cmos.default
index 98ce970..90d796f 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=256M
\ No newline at end of file
diff --git a/src/mainboard/lenovo/t400/cmos.layout b/src/mainboard/lenovo/t400/cmos.layout
index 8e642f8..e997ed5 100644
--- a/src/mainboard/lenovo/t400/cmos.layout
+++ b/src/mainboard/lenovo/t400/cmos.layout
@@ -76,12 +76,11 @@ entries
939 1 e 1 low_battery_beep
940 1 e 1 uwb
-# coreboot config options: northbridge
-941 3 e 11 gfx_uma_size
-
# coreboot config options: graphics
944 2 e 12 hybrid_graphics_mode
-#946 6 r 0 unused
+
+# coreboot config options: northbridge
+946 4 e 11 gfx_uma_size
# coreboot config options: EC
952 8 h 0 volume
@@ -130,12 +129,18 @@ 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
12 2 Switchable
diff --git a/src/mainboard/lenovo/x200/cmos.default b/src/mainboard/lenovo/x200/cmos.default
index ac9f96d..ec7ab46 100644
--- a/src/mainboard/lenovo/x200/cmos.default
+++ b/src/mainboard/lenovo/x200/cmos.default
@@ -13,3 +13,4 @@ sticky_fn=Disable
power_management_beeps=Enable
low_battery_beep=Enable
sata_mode=AHCI
+gfx_uma_size=256M
\ No newline at end of file
diff --git a/src/mainboard/lenovo/x200/cmos.layout b/src/mainboard/lenovo/x200/cmos.layout
index 931cb4a..a964600 100644
--- a/src/mainboard/lenovo/x200/cmos.layout
+++ b/src/mainboard/lenovo/x200/cmos.layout
@@ -77,10 +77,10 @@ entries
940 1 e 1 uwb
# coreboot config options: northbridge
-941 3 e 11 gfx_uma_size
-
944 8 h 0 volume
+952 4 e 11 gfx_uma_size
+
# coreboot config options: check sums
984 16 h 0 check_sum
#1000 24 r 0 unused
@@ -125,12 +125,18 @@ 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
# -----------------------------------------------------------------
checksums
diff --git a/src/mainboard/roda/rk9/cmos.layout b/src/mainboard/roda/rk9/cmos.layout
index f567b97..74fef63 100644
--- a/src/mainboard/roda/rk9/cmos.layout
+++ b/src/mainboard/roda/rk9/cmos.layout
@@ -70,9 +70,9 @@ entries
984 16 h 0 check_sum
# coreboot config options: northbridge
-1000 3 e 10 gfx_uma_size
+1000 4 e 10 gfx_uma_size
-#1003 21 r 0 unused
+#1004 20 r 0 unused
# ram initialization internal data
1024 128 r 0 read_training_results
@@ -112,13 +112,19 @@ enumerations
8 1 Yes
9 0 AHCI
9 1 Compatible
-10 0 32M
-10 1 48M
-10 2 64M
-10 3 128M
-10 5 96M
-10 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
+11 12 352M
# -----------------------------------------------------------------
checksums
diff --git a/src/northbridge/intel/gm45/igd.c b/src/northbridge/intel/gm45/igd.c
index 7e7bbbe..c56ecbe 100644
--- a/src/northbridge/intel/gm45/igd.c
+++ b/src/northbridge/intel/gm45/igd.c
@@ -153,10 +153,13 @@ void igd_compute_ggc(sysinfo_t *const sysinfo)
/* 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) {
- /* 0 for 32MB */
- gfxsize = 0;
+ /* 4 for 32MB, default if not set in cmos,
+ 8 for libreboot default of 256M*/
+ gfxsize = 8;
}
- sysinfo->ggc = 0x0300 | ((gfxsize + 5) << 4);
+ if (gfxsize > 11)
+ gfxsize = 8;
+ sysinfo->ggc = 0x0300 | ((gfxsize + 1) << 4);
if (!(capid & (1 << (48 - 32))))
sysinfo->ggc |= 0x0800;
}
--
2.8.2
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