drm/nv40/fb: enable z compression

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

4 files changed, 21 insertions, 5 deletions

diff --git a/drivers/gpu/drm/nouveau/core/subdev/fb/nv40.c b/drivers/gpu/drm/nouveau/core/subdev/fb/nv40.c
index 37c5e4c..fe7e298 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/fb/nv40.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/fb/nv40.c
@@ -41,15 +41,26 @@ nv40_fb_vram_init(struct nouveau_fb *pfb)
 	case 0x00000300: pfb->ram.type = NV_MEM_TYPE_DDR2; break;
 	}
 
-	pfb->ram.size = nv_rd32(pfb, 0x10020c) & 0xff000000;
+	pfb->ram.size  =  nv_rd32(pfb, 0x10020c) & 0xff000000;
+	pfb->ram.parts = (nv_rd32(pfb, 0x100200) & 0x00000003) + 1;
 	return nv_rd32(pfb, 0x100320);
 }
 
-static void
+void
 nv40_fb_tile_comp(struct nouveau_fb *pfb, int i, u32 size, u32 flags,
 		  struct nouveau_fb_tile *tile)
 {
-	tile->zcomp = 0x00000000;
+	u32 tiles = DIV_ROUND_UP(size, 0x80);
+	u32 tags  = round_up(tiles / pfb->ram.parts, 0x100);
+	if ( (flags & 2) &&
+	    !nouveau_mm_head(&pfb->tags, 1, tags, tags, 1, &tile->tag)) {
+		tile->zcomp  = 0x24000000; /* Z24S8_SPLIT */
+		tile->zcomp |= ((tile->tag->offset           ) >> 8);
+		tile->zcomp |= ((tile->tag->offset + tags - 1) >> 8) << 13;
+#ifdef __BIG_ENDIAN
+		tile->zcomp |= 0x40000000;
+#endif
+	}
 }
 
 static int
diff --git a/drivers/gpu/drm/nouveau/core/subdev/fb/nv41.c b/drivers/gpu/drm/nouveau/core/subdev/fb/nv41.c
index cc2cff6..e9e5a08 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/fb/nv41.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/fb/nv41.c
@@ -41,7 +41,8 @@ nv41_fb_vram_init(struct nouveau_fb *pfb)
 	if (pfb474 & 0x00000001)
 		pfb->ram.type = NV_MEM_TYPE_DDR1;
 
-	pfb->ram.size = nv_rd32(pfb, 0x10020c) & 0xff000000;
+	pfb->ram.size =   nv_rd32(pfb, 0x10020c) & 0xff000000;
+	pfb->ram.parts = (nv_rd32(pfb, 0x100200) & 0x00000003) + 1;
 	return nv_rd32(pfb, 0x100320);
 }
 
@@ -86,6 +87,7 @@ nv41_fb_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
 	priv->base.ram.init = nv41_fb_vram_init;
 	priv->base.tile.regions = 12;
 	priv->base.tile.init = nv30_fb_tile_init;
+	priv->base.tile.comp = nv40_fb_tile_comp;
 	priv->base.tile.fini = nv20_fb_tile_fini;
 	priv->base.tile.prog = nv41_fb_tile_prog;
 	return nouveau_fb_preinit(&priv->base);
diff --git a/drivers/gpu/drm/nouveau/core/subdev/fb/nv47.c b/drivers/gpu/drm/nouveau/core/subdev/fb/nv47.c
index a2ca3c8..818bba3 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/fb/nv47.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/fb/nv47.c
@@ -47,6 +47,7 @@ nv47_fb_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
 	priv->base.ram.init = nv41_fb_vram_init;
 	priv->base.tile.regions = 15;
 	priv->base.tile.init = nv30_fb_tile_init;
+	priv->base.tile.comp = nv40_fb_tile_comp;
 	priv->base.tile.fini = nv20_fb_tile_fini;
 	priv->base.tile.prog = nv41_fb_tile_prog;
 	return nouveau_fb_preinit(&priv->base);
diff --git a/drivers/gpu/drm/nouveau/core/subdev/fb/nv49.c b/drivers/gpu/drm/nouveau/core/subdev/fb/nv49.c
index aaec1e3..84a31af 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/fb/nv49.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/fb/nv49.c
@@ -42,7 +42,8 @@ nv49_fb_vram_init(struct nouveau_fb *pfb)
 	case 0x00000003: break;
 	}
 
-	pfb->ram.size = nv_rd32(pfb, 0x10020c) & 0xff000000;
+	pfb->ram.size =   nv_rd32(pfb, 0x10020c) & 0xff000000;
+	pfb->ram.parts = (nv_rd32(pfb, 0x100200) & 0x00000003) + 1;
 	return nv_rd32(pfb, 0x100320);
 }
 
@@ -63,6 +64,7 @@ nv49_fb_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
 	priv->base.ram.init = nv49_fb_vram_init;
 	priv->base.tile.regions = 15;
 	priv->base.tile.init = nv30_fb_tile_init;
+	priv->base.tile.comp = nv40_fb_tile_comp;
 	priv->base.tile.fini = nv20_fb_tile_fini;
 	priv->base.tile.prog = nv41_fb_tile_prog;