diff options
| author | Wang Qing Pei <wangqingpei@gmail.com> | 2010-08-17 11:11:09 +0000 |
|---|---|---|
| committer | Stefan Reinauer <stepan@openbios.org> | 2010-08-17 11:11:09 +0000 |
| commit | 543f767dbf86aa4625d22d3055f729c5fd3b45ac (patch) | |
| tree | d631166977fc2cd200f70cde9a9412239e26e79e /src/southbridge | |
| parent | 3f90125ab53af9957e4191b97c8e6e0f3da37f17 (diff) | |
| download | coreboot-543f767dbf86aa4625d22d3055f729c5fd3b45ac.tar.xz | |
Tilapila supports both dual slot and single slot. The difference should be
detected by the existence of dev3. Some other RS780 mainboard has
the same function. The patch added the function to make these boards work
smoothly.
Signed-off-by: Wang Qing Pei <wangqingpei@gmail.com>
Acked-by: Zheng Bao <zheng.bao@amd.com>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5714 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/southbridge')
| -rw-r--r-- | src/southbridge/amd/rs780/rs780_gfx.c | 36 |
1 files changed, 35 insertions, 1 deletions
diff --git a/src/southbridge/amd/rs780/rs780_gfx.c b/src/southbridge/amd/rs780/rs780_gfx.c index 88cb935de8..7208acd864 100644 --- a/src/southbridge/amd/rs780/rs780_gfx.c +++ b/src/southbridge/amd/rs780/rs780_gfx.c @@ -35,7 +35,7 @@ #include <delay.h> #include <cpu/x86/msr.h> #include "rs780.h" - +extern int is_dev3_present(void); void set_pcie_reset(void); void set_pcie_dereset(void); @@ -1214,6 +1214,40 @@ void rs780_gfx_init(device_t nb_dev, device_t dev, u32 port) printk(BIOS_DEBUG, "device = %x\n", dev->path.pci.devfn >> 3); dual_port_configuration(nb_dev, dev); break; + + case 2: + + if(is_dev3_present()){ + /* step 1, lane reversal (only need if CMOS option is enabled) */ + if (cfg->gfx_lane_reversal) { + set_nbmisc_enable_bits(nb_dev, 0x33, 1 << 2, 1 << 2); + set_nbmisc_enable_bits(nb_dev, 0x33, 1 << 3, 1 << 3); + } + printk(BIOS_DEBUG, "rs780_gfx_init step1.\n"); + /* step 1.1, dual-slot gfx configuration (only need if CMOS option is enabled) */ + /* AMD calls the configuration CrossFire */ + set_nbmisc_enable_bits(nb_dev, 0x0, 0xf << 8, 5 << 8); + printk(BIOS_DEBUG, "rs780_gfx_init step2.\n"); + + + printk(BIOS_DEBUG, "device = %x\n", dev->path.pci.devfn >> 3); + dual_port_configuration(nb_dev, dev); + + }else{ + if (cfg->gfx_lane_reversal) { + set_nbmisc_enable_bits(nb_dev, 0x33, 1 << 2, 1 << 2); + } + printk(BIOS_DEBUG, "rs780_gfx_init step1.\n"); + printk(BIOS_DEBUG, "rs780_gfx_init step2.\n"); + + if((dev->path.pci.devfn >> 3) == 2) + single_port_configuration(nb_dev, dev); + else{ + set_nbmisc_enable_bits(nb_dev, 0xc, 0, 0x2 << 2); /* hide the GFX bridge. */ + printk(BIOS_DEBUG, "If dev3.., single port. Do nothing.\n"); + } + } + default: printk(BIOS_INFO, "Incorrect configuration of external GFX slot.\n"); break; |