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Commit cd8c14b4 authored by Ben Skeggs's avatar Ben Skeggs
Browse files

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: default avatarBen Skeggs <bskeggs@redhat.com>
parent e5bf578c

drivers/gpu/drm/nouveau/core/subdev/ltcg/nvc0.c

+3 −1
Original line number Diff line number Diff line
@@ -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;