[Nouveau] NVAC "No Signal"

[Karol Herbst]

how sure are you, that this is needed for _every_ nvac?

2016-10-18 5:55 GMT+02:00 poma <pomidorabelisima at gmail.com>:
> Fixes "No Signal" via HDMI from NVIDIA Corporation ION VGA (rev b1)
>
> Ref.
> "drm/nouveau/disp/g94: implement workaround for dvi issue on fx380"
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2a4bd8a
>
> The last working Fedora kernel 4.8.0-0.rc0.git3.1.fc25
>
> Patched and tested with:
> $ modinfo -n nouveau
> /lib/modules/4.8.2-300.fc25.x86_64/updates/nouveau.ko
>
> Tested-by: poma <poma at gmail.com>
> ---
>  drivers/gpu/drm/nouveau/nvkm/engine/disp/nv50.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/nv50.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/nv50.c
> index fbb8c7d..c9e40e7 100644
> --- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/nv50.c
> +++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/nv50.c
> @@ -434,7 +434,8 @@ nv50_disp_dptmds_war(struct nvkm_device *device)
>         case 0x96:
>         case 0x98:
>         case 0xaa:
> -       case 0xac:
> +/* NVIDIA MCP79/MCP7A "No Signal" */
> +/*     case 0xac:                */
>                 return true;
>         default:
>                 break;
> --
> 2.7.4
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