drm/nouveau/bios/volt: Parse min and max for Version 0x40

This is according to what we have in nvbios.

Fixes "ERROR: Can't get value of subfeature in0_min: Can't read" errors
in sensors for some GPUs.

Signed-off-by: Karol Herbst <karolherbst@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/volt.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/volt.c
index a7797a9..7143ea4 100644 (file)
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/volt.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/volt.c
@@ -93,9 +93,9 @@ nvbios_volt_parse(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
                info->step    = nvbios_rd16(bios, volt + 0x08);
                info->vidmask = nvbios_rd08(bios, volt + 0x0b);
                info->ranged  = true; /* XXX: find the flag byte */
-               /*XXX*/
-               info->min     = 0;
-               info->max     = info->base;
+               info->min     = min(info->base,
+                                   info->base + info->step * info->vidmask);
+               info->max     = nvbios_rd32(bios, volt + 0x0e);
                break;
        case 0x50:
                info->min     = nvbios_rd32(bios, volt + 0x0a);