drm/nv50/graph: remove ability to do interrupt-driven context switching

We never turn this on, no point maintaining the code for it..

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

diff --git a/drivers/gpu/drm/nouveau/nv50_graph.c b/drivers/gpu/drm/nouveau/nv50_graph.c
index 69be4d190778c0d4e403798764d65e71479d1b4c..46b2c95de4d06c8fc32b0b515ba48592c45e9bc6 100644 (file)
--- a/drivers/gpu/drm/nouveau/nv50_graph.c
+++ b/drivers/gpu/drm/nouveau/nv50_graph.c
@@ -39,47 +39,6 @@ struct nv50_graph_engine {
        u32 grctx_size;
 };
 
-static int
-nv50_graph_do_load_context(struct drm_device *dev, uint32_t inst)
-{
-       uint32_t fifo = nv_rd32(dev, 0x400500);
-
-       nv_wr32(dev, 0x400500, fifo & ~1);
-       nv_wr32(dev, 0x400784, inst);
-       nv_wr32(dev, 0x400824, nv_rd32(dev, 0x400824) | 0x40);
-       nv_wr32(dev, 0x400320, nv_rd32(dev, 0x400320) | 0x11);
-       nv_wr32(dev, 0x400040, 0xffffffff);
-       (void)nv_rd32(dev, 0x400040);
-       nv_wr32(dev, 0x400040, 0x00000000);
-       nv_wr32(dev, 0x400304, nv_rd32(dev, 0x400304) | 1);
-
-       if (nouveau_wait_for_idle(dev))
-               nv_wr32(dev, 0x40032c, inst | (1<<31));
-       nv_wr32(dev, 0x400500, fifo);
-
-       return 0;
-}
-
-static int
-nv50_graph_unload_context(struct drm_device *dev)
-{
-       uint32_t inst;
-
-       inst  = nv_rd32(dev, NV50_PGRAPH_CTXCTL_CUR);
-       if (!(inst & NV50_PGRAPH_CTXCTL_CUR_LOADED))
-               return 0;
-       inst &= NV50_PGRAPH_CTXCTL_CUR_INSTANCE;
-
-       nouveau_wait_for_idle(dev);
-       nv_wr32(dev, 0x400784, inst);
-       nv_wr32(dev, 0x400824, nv_rd32(dev, 0x400824) | 0x20);
-       nv_wr32(dev, 0x400304, nv_rd32(dev, 0x400304) | 0x01);
-       nouveau_wait_for_idle(dev);
-
-       nv_wr32(dev, NV50_PGRAPH_CTXCTL_CUR, inst);
-       return 0;
-}
-
 static int
 nv50_graph_init(struct drm_device *dev, int engine)
 {
@@ -254,21 +213,6 @@ nv50_graph_object_new(struct nouveau_channel *chan, int engine,
        return ret;
 }
 
-static void
-nv50_graph_context_switch(struct drm_device *dev)
-{
-       uint32_t inst;
-
-       nv50_graph_unload_context(dev);
-
-       inst  = nv_rd32(dev, NV50_PGRAPH_CTXCTL_NEXT);
-       inst &= NV50_PGRAPH_CTXCTL_NEXT_INSTANCE;
-       nv50_graph_do_load_context(dev, inst);
-
-       nv_wr32(dev, NV40_PGRAPH_INTR_EN, nv_rd32(dev,
-               NV40_PGRAPH_INTR_EN) | NV_PGRAPH_INTR_CONTEXT_SWITCH);
-}
-
 static void
 nv50_graph_tlb_flush(struct drm_device *dev, int engine)
 {
@@ -805,15 +749,6 @@ nv50_graph_isr(struct drm_device *dev)
                                show &= ~0x00000010;
                }
 
-               if (stat & 0x00001000) {
-                       nv_wr32(dev, 0x400500, 0x00000000);
-                       nv_wr32(dev, 0x400100, 0x00001000);
-                       nv_mask(dev, 0x40013c, 0x00001000, 0x00000000);
-                       nv50_graph_context_switch(dev);
-                       stat &= ~0x00001000;
-                       show &= ~0x00001000;
-               }
-
                show = (show && nouveau_ratelimit()) ? show : 0;
 
                if (show & 0x00100000) {