drm/nouveau/gr/gf100-: add missing reset sequence before golden context init

RM and NVGPU both have a variant of this, we probably should too.

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

diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/gr/ctxgf100.c b/drivers/gpu/drm/nouveau/nvkm/engine/gr/ctxgf100.c
index 5560376..4c25389 100644 (file)
--- a/drivers/gpu/drm/nouveau/nvkm/engine/gr/ctxgf100.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/gr/ctxgf100.c
@@ -1456,6 +1456,26 @@ gf100_grctx_generate(struct gf100_gr *gr)
        int ret, i;
        u64 addr;
 
+       /* NV_PGRAPH_FE_PWR_MODE_FORCE_ON. */
+       nvkm_wr32(device, 0x404170, 0x00000012);
+       nvkm_msec(device, 2000,
+               if (!(nvkm_rd32(device, 0x404170) & 0x00000010))
+                       break;
+       );
+
+       /* Reset FECS. */
+       nvkm_wr32(device, 0x409614, 0x00000070);
+       nvkm_usec(device, 10, NVKM_DELAY);
+       nvkm_mask(device, 0x409614, 0x00000700, 0x00000700);
+       nvkm_usec(device, 10, NVKM_DELAY);
+       nvkm_rd32(device, 0x409614);
+
+       /* NV_PGRAPH_FE_PWR_MODE_AUTO. */
+       nvkm_wr32(device, 0x404170, 0x00000010);
+
+       /* Init SCC RAM. */
+       nvkm_wr32(device, 0x40802c, 0x00000001);
+
        /* Allocate memory to for a "channel", which we'll use to generate
         * the default context values.
         */