Feature of lane reversal of AMD RS780 is tested.

Signed-off-by: Zheng Bao <zheng.bao@amd.com>
Acked-by: Marc Jones <marcj303@gmail.com>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5703 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

diff --git a/src/southbridge/amd/rs780/rs780_gfx.c b/src/southbridge/amd/rs780/rs780_gfx.c
index 7decabdac339207a34a7f5f6da5352038a6a8e9e..0f493f26d01b04a8d678a826350b3eca6b141751 100644 (file)
--- a/src/southbridge/amd/rs780/rs780_gfx.c
+++ b/src/southbridge/amd/rs780/rs780_gfx.c
@@ -1178,9 +1178,11 @@ void rs780_gfx_init(device_t nb_dev, device_t dev, u32 port)
        /* Single-port/Dual-port configureation. */
        switch (cfg->gfx_dual_slot) {
        case 0:
-               /* step 1, lane reversal (only need if CMOS option is enabled) */
+               /* step 1, lane reversal (only need if build config 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, 0x36, 1 << 31, 0 << 31);
                }
                printk(BIOS_DEBUG, "rs780_gfx_init step1.\n");
 
@@ -1194,10 +1196,12 @@ void rs780_gfx_init(device_t nb_dev, device_t dev, u32 port)
 
                break;
        case 1:
-               /* step 1, lane reversal (only need if CMOS option is enabled) */
+               /* step 1, lane reversal (only need if build config 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) */