diff options
Diffstat (limited to 'resources/libreboot/patch/coreboot/29fc9bb855cb878aee263cd1fe110e3bb3e98c80/grub/x60')
| -rw-r--r-- | resources/libreboot/patch/coreboot/29fc9bb855cb878aee263cd1fe110e3bb3e98c80/grub/x60/0001-i945-Enable-changing-VRAM-size.patch | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/resources/libreboot/patch/coreboot/29fc9bb855cb878aee263cd1fe110e3bb3e98c80/grub/x60/0001-i945-Enable-changing-VRAM-size.patch b/resources/libreboot/patch/coreboot/29fc9bb855cb878aee263cd1fe110e3bb3e98c80/grub/x60/0001-i945-Enable-changing-VRAM-size.patch new file mode 100644 index 00000000..ce1d37c0 --- /dev/null +++ b/resources/libreboot/patch/coreboot/29fc9bb855cb878aee263cd1fe110e3bb3e98c80/grub/x60/0001-i945-Enable-changing-VRAM-size.patch @@ -0,0 +1,158 @@ +From 44b3d02a49bc25dc8e9119a11bd948db2c37a931 Mon Sep 17 00:00:00 2001 +From: Arthur Heymans <arthur@aheymans.xyz> +Date: Sun, 15 May 2016 02:17:12 +0200 +Subject: [PATCH] i945: Enable changing VRAM size + +On i945 the vram size was the default 8mb. It was also possible +to set it 1mb or 0mb hardcoding the GGC register in early_init.c + +The intel documentation on i945 only documents those three options. +They are set using 3 bits. The documententation also makes mention +of 4mb, 16mb, 32mb, 48mb, 64mb but not how to set it. + +The other non documented (straight forward) bit combinations allows +to change the VRAM size to those other states. + +Change-Id: I5e510e81322a4c8315c01b7963ac4b5f7f58a17e +Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> + +diff --git a/src/northbridge/intel/i945/Kconfig b/src/northbridge/intel/i945/Kconfig +index 6e8d35b..484ed78 100644 +--- a/src/northbridge/intel/i945/Kconfig ++++ b/src/northbridge/intel/i945/Kconfig +@@ -72,3 +72,56 @@ config CHECK_SLFRCS_ON_RESUME + effectively making it impossible to resume. + + endif ++ ++config VRAM_CHOICE ++ bool ++choice ++ prompt "VRAM Size" ++ depends on NORTHBRIDGE_INTEL_I945 ++ default VRAM_SIZE_8MB ++ help ++ Set the size of vram that the integrated graphic device can use ++ for a framebuffer. ++ ++config VRAM_SIZE_1MB ++ bool "1 MB" ++ help ++ Set VRAM size to 1MB. ++config VRAM_SIZE_4MB ++ bool "4 MB" ++ help ++ Set VRAM size to 4MB. ++config VRAM_SIZE_8MB ++ bool "8 MB" ++ help ++ Set VRAM size to 8MB. ++config VRAM_SIZE_16MB ++ bool "16 MB" ++ help ++ Set VRAM size to 16MB. ++config VRAM_SIZE_32MB ++ bool "32 MB" ++ help ++ Set VRAM size to 32MB. ++config VRAM_SIZE_48MB ++ bool "48 MB" ++ help ++ Set VRAM size to 48MB. ++config VRAM_SIZE_64MB ++ bool "64 MB" ++ help ++ Set VRAM size to 64MB. ++ ++endchoice ++ ++config VRAM_SIZE ++ hex ++ default 0x10 if VRAM_SIZE_1MB ++ default 0x20 if VRAM_SIZE_4MB ++ default 0x30 if VRAM_SIZE_8MB ++ default 0x40 if VRAM_SIZE_16MB ++ default 0x50 if VRAM_SIZE_32MB ++ default 0x60 if VRAM_SIZE_48MB ++ default 0x70 if VRAM_SIZE_64MB ++ help ++ map the vram sizes to an integer. +diff --git a/src/northbridge/intel/i945/early_init.c b/src/northbridge/intel/i945/early_init.c +index 475e88a..bd062ad 100644 +--- a/src/northbridge/intel/i945/early_init.c ++++ b/src/northbridge/intel/i945/early_init.c +@@ -177,11 +177,8 @@ static void i945_setup_bars(void) + pci_write_config32(PCI_DEV(0, 0x00, 0), DMIBAR, (uintptr_t)DEFAULT_DMIBAR | 1); + pci_write_config32(PCI_DEV(0, 0x00, 0), X60BAR, DEFAULT_X60BAR | 1); + +- /* Hardware default is 8MB UMA. If someone wants to make this a +- * CMOS or compile time option, send a patch. +- * pci_write_config16(PCI_DEV(0, 0x00, 0), GGC, 0x30); +- */ +- ++ /* Sets up VRAM size from the build option VRAM_SIZE */ ++ pci_write_config16(PCI_DEV(0, 0x00, 0), GGC, CONFIG_VRAM_SIZE); + /* Set C0000-FFFFF to access RAM on both reads and writes */ + pci_write_config8(PCI_DEV(0, 0x00, 0), PAM0, 0x30); + pci_write_config8(PCI_DEV(0, 0x00, 0), PAM1, 0x33); +diff --git a/src/northbridge/intel/i945/gma.c b/src/northbridge/intel/i945/gma.c +index df13ef4..f853cc8 100644 +--- a/src/northbridge/intel/i945/gma.c ++++ b/src/northbridge/intel/i945/gma.c +@@ -359,9 +359,24 @@ static int intel_gma_init(struct northbridge_intel_i945_config *conf, + case 1: + uma_size = 1024; + break; ++ case 2: ++ uma_size = 4096; ++ break; + case 3: + uma_size = 8192; + break; ++ case 4: ++ uma_size = 16384; ++ break; ++ case 5: ++ uma_size = 32768; ++ break; ++ case 6: ++ uma_size = 49152; ++ break; ++ case 7: ++ uma_size = 65536; ++ break; + } + + printk(BIOS_DEBUG, "%dM UMA\n", uma_size >> 10); +diff --git a/src/northbridge/intel/i945/northbridge.c b/src/northbridge/intel/i945/northbridge.c +index 514f88c..4be9827 100644 +--- a/src/northbridge/intel/i945/northbridge.c ++++ b/src/northbridge/intel/i945/northbridge.c +@@ -112,9 +112,24 @@ static void pci_domain_set_resources(device_t dev) + case 1: + uma_size = 1024; + break; ++ case 2: ++ uma_size = 4096; ++ break; + case 3: + uma_size = 8192; + break; ++ case 4: ++ uma_size = 16384; ++ break; ++ case 5: ++ uma_size = 32768; ++ break; ++ case 6: ++ uma_size = 49152; ++ break; ++ case 7: ++ uma_size = 65536; ++ break; + } + + printk(BIOS_DEBUG, "%dM UMA\n", uma_size >> 10); +-- +2.8.2 + |