On Fri, Apr 25, 2014 at 5:19 PM, Alexandre Courbot <acourbot@xxxxxxxxxx> wrote:
> nvc0_graph_ctor() would only let the graphics engine be enabled if its
> oclass has a proper microcode linked to it. This prevents GR from being
> enabled at all on chips that rely exclusively on external firmware, even
> though such a use-case is valid.
>
> Relax the conditions enabling the GR engine to also include the case
> where an external firmware has also been loaded.
I'm happy to take this patch as-is. I do wonder if we should do
something like this though:
if (nouveau_boolopt(device->cfgopt, "NvGrUseFW", oclass->fecs.ucode == NULL))
Which will automatically switch to external firmware if there's no
internal implementation available.
Thoughts? This could be a separate patch even, if preferred.
Thanks,
Ben.
>
> Signed-off-by: Alexandre Courbot <acourbot@xxxxxxxxxx>
> ---
> drivers/gpu/drm/nouveau/core/engine/graph/nvc0.c | 9 ++++++---
> 1 file changed, 6 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/nouveau/core/engine/graph/nvc0.c b/drivers/gpu/drm/nouveau/core/engine/graph/nvc0.c
> index f3c7329da0a0..e5b75f189988 100644
> --- a/drivers/gpu/drm/nouveau/core/engine/graph/nvc0.c
> +++ b/drivers/gpu/drm/nouveau/core/engine/graph/nvc0.c
> @@ -1259,10 +1259,13 @@ nvc0_graph_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
> struct nvc0_graph_oclass *oclass = (void *)bclass;
> struct nouveau_device *device = nv_device(parent);
> struct nvc0_graph_priv *priv;
> + bool use_ext_fw, enable;
> int ret, i;
>
> - ret = nouveau_graph_create(parent, engine, bclass,
> - (oclass->fecs.ucode != NULL), &priv);
> + use_ext_fw = nouveau_boolopt(device->cfgopt, "NvGrUseFW", false);
> + enable = use_ext_fw || oclass->fecs.ucode != NULL;
> +
> + ret = nouveau_graph_create(parent, engine, bclass, enable, &priv);
> *pobject = nv_object(priv);
> if (ret)
> return ret;
> @@ -1272,7 +1275,7 @@ nvc0_graph_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
>
> priv->base.units = nvc0_graph_units;
>
> - if (nouveau_boolopt(device->cfgopt, "NvGrUseFW", false)) {
> + if (use_ext_fw) {
> nv_info(priv, "using external firmware\n");
> if (nvc0_graph_ctor_fw(priv, "fuc409c", &priv->fuc409c) ||
> nvc0_graph_ctor_fw(priv, "fuc409d", &priv->fuc409d) ||
> --
> 1.9.2
>
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