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drm/nouveau/pm: add support for parsing perflvl voltage on fermi chips

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Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs
2011-06-09 16:57:07 +10:00
parent a31214ef3e
commit 3b5565ddfd
3 changed files with 69 additions and 16 deletions
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58
drivers/gpu/drm/nouveau/nouveau_perf.c
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@@ -134,6 +134,49 @@ nouveau_perf_timing(struct drm_device *dev, struct bit_entry *P,
return &pm->memtimings.timing[entry[1]];
}
static void
nouveau_perf_voltage(struct drm_device *dev, struct bit_entry *P,
struct nouveau_pm_level *perflvl)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nvbios *bios = &dev_priv->vbios;
u8 *vmap;
int id;
id = perflvl->volt_min;
perflvl->volt_min = 0;
/* pre-fermi vbios stores the voltage level directly in the
* perflvl entry as a multiple of 10mV
*/
if (dev_priv->card_type < NV_C0) {
perflvl->volt_min = id * 10000;
perflvl->volt_max = perflvl->volt_min;
return;
}
/* from fermi onwards, the perflvl stores an index into yet another
* vbios table containing a min/max voltage value for the perflvl
*/
if (P->version != 2 || P->length < 34) {
NV_DEBUG(dev, "where's our volt map table ptr? %d %d\n",
P->version, P->length);
return;
}
vmap = ROMPTR(bios, P->data[32]);
if (!vmap) {
NV_DEBUG(dev, "volt map table pointer invalid\n");
return;
}
if (id < vmap[3]) {
vmap += vmap[1] + (vmap[2] * id);
perflvl->volt_min = ROM32(vmap[0]);
perflvl->volt_max = ROM32(vmap[4]);
}
}
void
nouveau_perf_init(struct drm_device *dev)
{
@@ -204,7 +247,7 @@ nouveau_perf_init(struct drm_device *dev)
case 0x15:
perflvl->fanspeed = entry[55];
if (recordlen > 56)
perflvl->voltage = entry[56] * 10000;
perflvl->volt_min = entry[56];
perflvl->core = ROM32(entry[1]) * 10;
perflvl->memory = ROM32(entry[5]) * 20;
break;
@@ -212,7 +255,7 @@ nouveau_perf_init(struct drm_device *dev)
case 0x23:
case 0x24:
perflvl->fanspeed = entry[4];
perflvl->voltage = entry[5] * 10000;
perflvl->volt_min = entry[5];
perflvl->core = ROM16(entry[6]) * 1000;
if (dev_priv->chipset == 0x49 ||
@@ -224,7 +267,7 @@ nouveau_perf_init(struct drm_device *dev)
break;
case 0x25:
perflvl->fanspeed = entry[4];
perflvl->voltage = entry[5] * 10000;
perflvl->volt_min = entry[5];
perflvl->core = ROM16(entry[6]) * 1000;
perflvl->shader = ROM16(entry[10]) * 1000;
perflvl->memory = ROM16(entry[12]) * 1000;
@@ -233,7 +276,7 @@ nouveau_perf_init(struct drm_device *dev)
perflvl->memscript = ROM16(entry[2]);
case 0x35:
perflvl->fanspeed = entry[6];
perflvl->voltage = entry[7] * 10000;
perflvl->volt_min = entry[7];
perflvl->core = ROM16(entry[8]) * 1000;
perflvl->shader = ROM16(entry[10]) * 1000;
perflvl->memory = ROM16(entry[12]) * 1000;
@@ -243,7 +286,7 @@ nouveau_perf_init(struct drm_device *dev)
case 0x40:
#define subent(n) entry[perf[2] + ((n) * perf[3])]
perflvl->fanspeed = 0; /*XXX*/
perflvl->voltage = entry[2] * 10000;
perflvl->volt_min = entry[2];
if (dev_priv->card_type == NV_50) {
perflvl->core = ROM16(subent(0)) & 0xfff;
perflvl->shader = ROM16(subent(1)) & 0xfff;
@@ -263,8 +306,9 @@ nouveau_perf_init(struct drm_device *dev)
}
/* make sure vid is valid */
if (pm->voltage.supported && perflvl->voltage) {
vid = nouveau_volt_vid_lookup(dev, perflvl->voltage);
nouveau_perf_voltage(dev, &P, perflvl);
if (pm->voltage.supported && perflvl->volt_min) {
vid = nouveau_volt_vid_lookup(dev, perflvl->volt_min);
if (vid < 0) {
NV_DEBUG(dev, "drop perflvl %d, bad vid\n", i);
entry += recordlen;