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drm/nouveau/volt: Properly detect entry based voltage tables

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There is a field in the voltage table which tells us if the VIDs are taken
from the entries or calculated through the header.

v2: Don't break older versions.
v5: Reverse flag name.

Signed-off-by: Karol Herbst <karolherbst@gmail.com>
Reviewed-by: Martin Peres <martin.peres@free.fr>
Tested-by: Pierre Moreau <pierre.morrow@free.fr>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Karol Herbst
2016-07-12 21:36:08 +02:00
committed by Ben Skeggs
parent 32dd7f2329
commit 17f486de6a
3 changed files with 17 additions and 7 deletions
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7
drivers/gpu/drm/nouveau/nvkm/subdev/volt/base.c
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@@ -112,6 +112,7 @@ nvkm_volt_set_id(struct nvkm_volt *volt, u8 id, int condition)
static void
nvkm_volt_parse_bios(struct nvkm_bios *bios, struct nvkm_volt *volt)
{
struct nvkm_subdev *subdev = &bios->subdev;
struct nvbios_volt_entry ivid;
struct nvbios_volt info;
u8 ver, hdr, cnt, len;
@@ -119,7 +120,8 @@ nvkm_volt_parse_bios(struct nvkm_bios *bios, struct nvkm_volt *volt)
int i;
data = nvbios_volt_parse(bios, &ver, &hdr, &cnt, &len, &info);
if (data && info.vidmask && info.base && info.step) {
if (data && info.vidmask && info.base && info.step && info.ranged) {
nvkm_debug(subdev, "found ranged based VIDs\n");
volt->min_uv = info.min;
volt->max_uv = info.max;
for (i = 0; i < info.vidmask + 1; i++) {
@@ -132,7 +134,8 @@ nvkm_volt_parse_bios(struct nvkm_bios *bios, struct nvkm_volt *volt)
info.base += info.step;
}
volt->vid_mask = info.vidmask;
} else if (data && info.vidmask) {
} else if (data && info.vidmask && !info.ranged) {
nvkm_debug(subdev, "found entry based VIDs\n");
volt->min_uv = 0xffffffff;
volt->max_uv = 0;
for (i = 0; i < cnt; i++) {