drm/nvf0/gr: magic sequence that makes PGRAPH come out of hiding

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

2 files changed, 48 insertions, 4 deletions

diff --git a/drivers/gpu/drm/nouveau/core/engine/device/nve0.c b/drivers/gpu/drm/nouveau/core/engine/device/nve0.c
index 90779120d9e9..7aca1877add4 100644
--- a/drivers/gpu/drm/nouveau/core/engine/device/nve0.c
+++ b/drivers/gpu/drm/nouveau/core/engine/device/nve0.c
@@ -164,10 +164,8 @@ nve0_identify(struct nouveau_device *device)
                 device->oclass[NVDEV_SUBDEV_BAR    ] = &nvc0_bar_oclass;
                 device->oclass[NVDEV_ENGINE_DMAOBJ ] = &nvd0_dmaeng_oclass;
                 device->oclass[NVDEV_ENGINE_FIFO   ] = &nve0_fifo_oclass;
-#if 0
                 device->oclass[NVDEV_ENGINE_SW     ] = &nvc0_software_oclass;
                 device->oclass[NVDEV_ENGINE_GR     ] =  nvf0_graph_oclass;
-#endif
                 device->oclass[NVDEV_ENGINE_DISP   ] = &nvf0_disp_oclass;
                 device->oclass[NVDEV_ENGINE_COPY0  ] = &nve0_copy0_oclass;
                 device->oclass[NVDEV_ENGINE_COPY1  ] = &nve0_copy1_oclass;
diff --git a/drivers/gpu/drm/nouveau/core/engine/graph/nvf0.c b/drivers/gpu/drm/nouveau/core/engine/graph/nvf0.c
index 1d6ebd05216e..d7dff11c1883 100644
--- a/drivers/gpu/drm/nouveau/core/engine/graph/nvf0.c
+++ b/drivers/gpu/drm/nouveau/core/engine/graph/nvf0.c
@@ -25,6 +25,15 @@
 #include "nvc0.h"
 
 /*******************************************************************************
+ * Graphics object classes
+ ******************************************************************************/
+
+static struct nouveau_oclass
+nvf0_graph_sclass[] = {
+        {}
+};
+
+/*******************************************************************************
  * PGRAPH engine/subdev functions
  ******************************************************************************/
 
@@ -142,6 +151,43 @@ nvf0_graph_init_tpc[] = {
         {}
 };
 
+static int
+nvf0_graph_fini(struct nouveau_object *object, bool suspend)
+{
+        struct nvc0_graph_priv *priv = (void *)object;
+        static const struct {
+                u32 addr;
+                u32 data;
+        } magic[] = {
+                { 0x020520, 0xfffffffc },
+                { 0x020524, 0xfffffffe },
+                { 0x020524, 0xfffffffc },
+                { 0x020524, 0xfffffff8 },
+                { 0x020524, 0xffffffe0 },
+                { 0x020530, 0xfffffffe },
+                { 0x02052c, 0xfffffffa },
+                { 0x02052c, 0xfffffff0 },
+                { 0x02052c, 0xffffffc0 },
+                { 0x02052c, 0xffffff00 },
+                { 0x02052c, 0xfffffc00 },
+                { 0x02052c, 0xfffcfc00 },
+                { 0x02052c, 0xfff0fc00 },
+                { 0x02052c, 0xff80fc00 },
+                { 0x020528, 0xfffffffe },
+                { 0x020528, 0xfffffffc },
+        };
+        int i;
+
+        nv_mask(priv, 0x000200, 0x08001000, 0x00000000);
+        nv_mask(priv, 0x0206b4, 0x00000000, 0x00000000);
+        for (i = 0; i < ARRAY_SIZE(magic); i++) {
+                nv_wr32(priv, magic[i].addr, magic[i].data);
+                nv_wait(priv, magic[i].addr, 0x80000000, 0x00000000);
+        }
+
+        return nouveau_graph_fini(&priv->base, suspend);
+}
+
 static struct nvc0_graph_init *
 nvf0_graph_init_mmio[] = {
         nve4_graph_init_regs,
@@ -168,9 +214,9 @@ nvf0_graph_oclass = &(struct nvc0_graph_oclass) {
                 .ctor = nvc0_graph_ctor,
                 .dtor = nvc0_graph_dtor,
                 .init = nve4_graph_init,
-                .fini = _nouveau_graph_fini,
+                .fini = nvf0_graph_fini,
         },
         .cclass = &nvf0_grctx_oclass,
-        .sclass = NULL,
+        .sclass =  nvf0_graph_sclass,
         .mmio = nvf0_graph_init_mmio,
 }.base;