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

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/gpu/drm/nouveau/include/nvkm/subdev/bios/volt.h
View File

@ -13,8 +13,9 @@ struct nvbios_volt {
u32 base;
/* GPIO mode */
u8 vidmask;
s16 step;
bool ranged;
u8 vidmask;
s16 step;
/* PWM mode */
u32 pwm_freq;

12
drivers/gpu/drm/nouveau/nvkm/subdev/bios/volt.c
View File

@ -75,20 +75,24 @@ nvbios_volt_parse(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
case 0x12:
info->type = NVBIOS_VOLT_GPIO;
info->vidmask = nvbios_rd08(bios, volt + 0x04);
info->ranged = false;
break;
case 0x20:
info->type = NVBIOS_VOLT_GPIO;
info->vidmask = nvbios_rd08(bios, volt + 0x05);
info->ranged = false;
break;
case 0x30:
info->type = NVBIOS_VOLT_GPIO;
info->vidmask = nvbios_rd08(bios, volt + 0x04);
info->ranged = false;
break;
case 0x40:
info->type = NVBIOS_VOLT_GPIO;
info->base = nvbios_rd32(bios, volt + 0x04);
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;
@ -104,9 +108,11 @@ nvbios_volt_parse(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
info->pwm_freq = nvbios_rd32(bios, volt + 0x5) / 1000;
info->pwm_range = nvbios_rd32(bios, volt + 0x16);
} else {
info->type = NVBIOS_VOLT_GPIO;
info->vidmask = nvbios_rd08(bios, volt + 0x06);
info->step = nvbios_rd16(bios, volt + 0x16);
info->type = NVBIOS_VOLT_GPIO;
info->vidmask = nvbios_rd08(bios, volt + 0x06);
info->step = nvbios_rd16(bios, volt + 0x16);
info->ranged =
!!(nvbios_rd08(bios, volt + 0x4) & 0x2);
}
break;
}

7
drivers/gpu/drm/nouveau/nvkm/subdev/volt/base.c
View File

@ -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++) {