From: Ben Skeggs <bskeggs@redhat.com>
Date: Thu, 21 Apr 2016 00:28:55 +0000 (+1000)
Subject: drm/nouveau/gr/gm107-: fix touching non-existent ppcs in attrib cb setup
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=00f50c662c5aa3cebea62015d1df8cd5b19a41b6;p=linux-beck.git

drm/nouveau/gr/gm107-: fix touching non-existent ppcs in attrib cb setup

Also removes an XXX; according to nvgpu headers the field is called
NV_PGRAPH_GPCS_SWDX_TC_BETA_CB_SIZE_DIV3, so, apparently not some
magic we need to figure out :)

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
---

diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/gr/ctxgm107.c b/drivers/gpu/drm/nouveau/nvkm/engine/gr/ctxgm107.c
index 053ff2f850b9..6d3c5011e18c 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/gr/ctxgm107.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/gr/ctxgm107.c
@@ -920,13 +920,15 @@ gm107_grctx_generate_attrib(struct gf100_grctx *info)
 			const u32 bs = attrib * gr->ppc_tpc_nr[gpc][ppc];
 			const u32 u = 0x418ea0 + (n * 0x04);
 			const u32 o = PPC_UNIT(gpc, ppc, 0);
+			if (!(gr->ppc_mask[gpc] & (1 << ppc)))
+				continue;
 			mmio_wr32(info, o + 0xc0, bs);
 			mmio_wr32(info, o + 0xf4, bo);
 			bo += grctx->attrib_nr_max * gr->ppc_tpc_nr[gpc][ppc];
 			mmio_wr32(info, o + 0xe4, as);
 			mmio_wr32(info, o + 0xf8, ao);
 			ao += grctx->alpha_nr_max * gr->ppc_tpc_nr[gpc][ppc];
-			mmio_wr32(info, u, ((bs / 3 /*XXX*/) << 16) | bs);
+			mmio_wr32(info, u, ((bs / 3) << 16) | bs);
 		}
 	}
 }