[coreboot] [patch] add missing code for rs780 lane reversal

[Qing Pei Wang]

Acked-by: QingPei Wang<wangqingpei at gmail.com>

Best wishes
Wang Qing Pei
Phone: 86+18930528086


On Fri, Dec 3, 2010 at 1:21 PM, Bao, Zheng <Zheng.Bao at amd.com> wrote:

> 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 at amd.com>
>
> Index: src/southbridge/amd/rs780/rs780_gfx.c
> ===================================================================
> --- src/southbridge/amd/rs780/rs780_gfx.c       (revision 6137)
> +++ src/southbridge/amd/rs780/rs780_gfx.c       (working copy)
> @@ -1302,8 +1302,10 @@
>                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 @@
>
>                }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);
>
> --
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> http://www.coreboot.org/mailman/listinfo/coreboot
>
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