Some Kepler cards have no usefull header in the voltage table, which means
nouveau has to read the voltages out of the entries directly.
The mask may be bigger than 0x1fffff, but this value is already >2V, so it will
be fine for now.
This patch fixes volting issues on those cards enabling them to switch cstates
Signed-off-by: Karol Herbst <nouv...@karolherbst.de>
---
drm/nouveau/nvkm/subdev/bios/volt.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drm/nouveau/nvkm/subdev/bios/volt.c
b/drm/nouveau/nvkm/subdev/bios/volt.c
index 6e0a336..fd2776b 100644
--- a/drm/nouveau/nvkm/subdev/bios/volt.c
+++ b/drm/nouveau/nvkm/subdev/bios/volt.c
@@ -142,7 +142,10 @@ nvbios_volt_entry_parse(struct nvkm_bios *bios, int idx,
u8 *ver, u8 *len,
info->vid = nvbios_rd08(bios, volt + 0x01) >> 2;
break;
case 0x40:
+ break;
case 0x50:
+ info->voltage = nvbios_rd32(bios, volt) & 0x001fffff;
+ info->vid = idx;
break;
}
return volt;
--
2.7.2
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