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drm/nvc0/ltcg: read LTS count at startup 

Not really sure how to confirm this 100%, but, the numbers match on all the
traces I have for NVCx (2 LTS), NVD9 (1LTS) and NVEx (4LTS).

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2012-09-05 12:19:26 +10:00
parent e5bf578ce6
commit cd8c14b407
1 changed files with 3 additions and 1 deletions
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4
drivers/gpu/drm/nouveau/core/subdev/ltcg/nvc0.c
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@ -26,6 +26,7 @@
struct nvc0_ltcg_priv {
struct nouveau_ltcg base;
u32 subp_nr;
};
static void
@ -49,7 +50,7 @@ nvc0_ltcg_intr(struct nouveau_subdev *subdev)
units = nv_rd32(priv, 0x00017c);
while (units) {
u32 subp, unit = ffs(units) - 1;
for (subp = 0; subp < 2; subp++)
for (subp = 0; subp < priv->subp_nr; subp++)
nvc0_ltcg_subp_isr(priv, unit, subp);
units &= ~(1 << unit);
}
@ -73,6 +74,7 @@ nvc0_ltcg_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
if (ret)
return ret;
priv->subp_nr = nv_rd32(priv, 0x17e8dc) >> 24;
nv_mask(priv, 0x17e820, 0x00100000, 0x00000000); /* INTR_EN &= ~0x10 */
nv_subdev(priv)->intr = nvc0_ltcg_intr;