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drm/gk104/gr: therm magic needed on some kepler boards

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Not needed everywhere, and potentially not safe to do depending on how
the rest of PTHERM is configured...

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2014-03-05 14:46:48 +10:00
parent 6f1e9b99b3
commit 1f1ac3bf2a
1 changed files with 24 additions and 1 deletions
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25
drivers/gpu/drm/nouveau/core/engine/graph/nve4.c
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@ -189,6 +189,29 @@ nve4_graph_pack_mmio[] = {
* PGRAPH engine/subdev functions
******************************************************************************/
static int
nve4_graph_fini(struct nouveau_object *object, bool suspend)
{
struct nvc0_graph_priv *priv = (void *)object;
/*XXX: this is a nasty hack to power on gr on certain boards
* where it's disabled by therm, somehow. ideally it'd
* be nice to know when we should be doing this, and why,
* but, it's yet to be determined. for now we test for
* the particular mmio error that occurs in the situation,
* and then bash therm in the way nvidia do.
*/
nv_mask(priv, 0x000200, 0x08001000, 0x08001000);
nv_rd32(priv, 0x000200);
if (nv_rd32(priv, 0x400700) == 0xbadf1000) {
nv_mask(priv, 0x000200, 0x08001000, 0x00000000);
nv_rd32(priv, 0x000200);
nv_mask(priv, 0x020004, 0xc0000000, 0x40000000);
}
return nouveau_graph_fini(&priv->base, suspend);
}
int
nve4_graph_init(struct nouveau_object *object)
{
@ -327,7 +350,7 @@ nve4_graph_oclass = &(struct nvc0_graph_oclass) {
.ctor = nvc0_graph_ctor,
.dtor = nvc0_graph_dtor,
.init = nve4_graph_init,
.fini = _nouveau_graph_fini,
.fini = nve4_graph_fini,
},
.cclass = &nve4_grctx_oclass,
.sclass = nve4_graph_sclass,