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drm/nouveau: Parse old style perf tables.

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Used on nv17-nv28, they contain memory clocks and timings, only one of
the table entries can actually be used, depending on the RAMCFG
straps, and it's usually higher than the frequency programmed on boot
by the BIOS.

The memory timings listed in table version 0x1x are used to init the
0x12xx range but they aren't required for reclocking to work.

Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Francisco Jerez 2010-09-20 16:18:28 +02:00 committed by Ben Skeggs
parent 038b8b2a0d
commit 0fbb114af7
2 changed files with 53 additions and 4 deletions
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47
drivers/gpu/drm/nouveau/nouveau_perf.c
View File

@ -27,6 +27,51 @@
#include "nouveau_drv.h"
#include "nouveau_pm.h"
static void
legacy_perf_init(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nvbios *bios = &dev_priv->vbios;
struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
char *perf, *entry, *bmp = &bios->data[bios->offset];
int headerlen, use_straps;
if (bmp[5] < 0x5 || bmp[6] < 0x14) {
NV_DEBUG(dev, "BMP version too old for perf\n");
return;
}
perf = ROMPTR(bios, bmp[0x73]);
if (!perf) {
NV_DEBUG(dev, "No memclock table pointer found.\n");
return;
}
switch (perf[0]) {
case 0x12:
case 0x14:
case 0x18:
use_straps = 0;
headerlen = 1;
break;
case 0x01:
use_straps = perf[1] & 1;
headerlen = (use_straps ? 8 : 2);
break;
default:
NV_WARN(dev, "Unknown memclock table version %x.\n", perf[0]);
return;
}
entry = perf + headerlen;
if (use_straps)
entry += (nv_rd32(dev, NV_PEXTDEV_BOOT_0) & 0x3c) >> 1;
sprintf(pm->perflvl[0].name, "performance_level_0");
pm->perflvl[0].memory = ROM16(entry[0]) * 20;
pm->nr_perflvl = 1;
}
void
nouveau_perf_init(struct drm_device *dev)
{
@ -59,7 +104,7 @@ nouveau_perf_init(struct drm_device *dev)
}
} else {
if (bios->data[bios->offset + 6] < 0x27) {
NV_DEBUG(dev, "BMP version too old for perf\n");
legacy_perf_init(dev);
return;
}

10
drivers/gpu/drm/nouveau/nouveau_pm.c
View File

@ -148,7 +148,11 @@ nouveau_pm_perflvl_get(struct drm_device *dev, struct nouveau_pm_level *perflvl)
static void
nouveau_pm_perflvl_info(struct nouveau_pm_level *perflvl, char *ptr, int len)
{
char s[16], v[16], f[16];
char c[16], s[16], v[16], f[16];
c[0] = '\0';
if (perflvl->core)
snprintf(c, sizeof(c), " core %dMHz", perflvl->core / 1000);
s[0] = '\0';
if (perflvl->shader)
@ -162,8 +166,8 @@ nouveau_pm_perflvl_info(struct nouveau_pm_level *perflvl, char *ptr, int len)
if (perflvl->fanspeed)
snprintf(f, sizeof(f), " fanspeed %d%%", perflvl->fanspeed);
snprintf(ptr, len, "core %dMHz memory %dMHz%s%s%s\n",
perflvl->core / 1000, perflvl->memory / 1000, s, v, f);
snprintf(ptr, len, "memory %dMHz%s%s%s%s\n", perflvl->memory / 1000,
c, s, v, f);
}
static ssize_t