From c0cd04700f5c88145602b35c24e9128767a4ad69 Mon Sep 17 00:00:00 2001
From: Karol Herbst <karolherbst@gmail.com>
Date: Sun, 23 Apr 2017 10:36:31 +0200
Subject: [PATCH] drm/nouveau/bios/volt: Parse min and max for Version 0x40
Git-commit: c0cd04700f5c88145602b35c24e9128767a4ad69
Patch-mainline: v4.13-rc1
References: bsc#1095094

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>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/gpu/drm/nouveau/nvkm/subdev/bios/volt.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- 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
 		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);