Before lane reversal,

De-asserts STRAP_BIF_all_valid for
PCIE-GFX core.
After lane reversal,
Asserts STRAP_BIF_all_valid for
PCIE-GFX core.

Signed-off-by: Zheng Bao <zheng.bao@amd.com>
Acked-by: QingPei Wang <wangqingpei@gmail.com>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@6142 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

diff --git a/src/southbridge/amd/rs780/rs780_gfx.c b/src/southbridge/amd/rs780/rs780_gfx.c
index 18836675e007785b538f85907320c54e505255db..1763c36047a150b3d8245d7ee53d7b6637d51106 100644 (file)
--- a/src/southbridge/amd/rs780/rs780_gfx.c
+++ b/src/southbridge/amd/rs780/rs780_gfx.c
@@ -1302,8 +1302,10 @@ void rs780_gfx_init(device_t nb_dev, device_t dev, u32 port)
                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, 0x36, 1 << 31, 1 << 31);
                                set_nbmisc_enable_bits(nb_dev, 0x33, 1 << 2, 1 << 2);
                                set_nbmisc_enable_bits(nb_dev, 0x33, 1 << 3, 1 << 3);
+                               set_nbmisc_enable_bits(nb_dev, 0x36, 1 << 31, 0 << 31);
                        }
                        printk(BIOS_DEBUG, "rs780_gfx_init step1.\n");
                        /* step 1.1, dual-slot gfx configuration (only need if CMOS option is enabled) */
@@ -1317,10 +1319,11 @@ void rs780_gfx_init(device_t nb_dev, device_t dev, u32 port)
 
                }else{
                        if (cfg->gfx_lane_reversal) {
+                               set_nbmisc_enable_bits(nb_dev, 0x36, 1 << 31, 1 << 31);
                                set_nbmisc_enable_bits(nb_dev, 0x33, 1 << 2, 1 << 2);
+                               set_nbmisc_enable_bits(nb_dev, 0x36, 1 << 31, 0 << 31);
                        }
                        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);