1 files changed, 75 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nv40_fb.c b/drivers/gpu/drm/nouveau/nv40_fb.c
new file mode 100644
index 000000000000..3cd07d8d5bd7
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nv40_fb.c
@@ -0,0 +1,75 @@
+#include "drmP.h"
+#include "drm.h"
+#include "nouveau_drv.h"
+#include "nouveau_drm.h"
+
+void
+nv40_fb_set_region_tiling(struct drm_device *dev, int i, uint32_t addr,
+			  uint32_t size, uint32_t pitch)
+{
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	uint32_t limit = max(1u, addr + size) - 1;
+
+	if (pitch)
+		addr |= 1;
+
+	switch (dev_priv->chipset) {
+	case 0x40:
+		nv_wr32(dev, NV10_PFB_TLIMIT(i), limit);
+		nv_wr32(dev, NV10_PFB_TSIZE(i), pitch);
+		nv_wr32(dev, NV10_PFB_TILE(i), addr);
+		break;
+
+	default:
+		nv_wr32(dev, NV40_PFB_TLIMIT(i), limit);
+		nv_wr32(dev, NV40_PFB_TSIZE(i), pitch);
+		nv_wr32(dev, NV40_PFB_TILE(i), addr);
+		break;
+	}
+}
+
+int
+nv40_fb_init(struct drm_device *dev)
+{
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	struct nouveau_fb_engine *pfb = &dev_priv->engine.fb;
+	uint32_t tmp;
+	int i;
+
+	/* This is strictly a NV4x register (don't know about NV5x). */
+	/* The blob sets these to all kinds of values, and they mess up our setup. */
+	/* I got value 0x52802 instead. For some cards the blob even sets it back to 0x1. */
+	/* Note: the blob doesn't read this value, so i'm pretty sure this is safe for all cards. */
+	/* Any idea what this is? */
+	nv_wr32(dev, NV40_PFB_UNK_800, 0x1);
+
+	switch (dev_priv->chipset) {
+	case 0x40:
+	case 0x45:
+		tmp = nv_rd32(dev, NV10_PFB_CLOSE_PAGE2);
+		nv_wr32(dev, NV10_PFB_CLOSE_PAGE2, tmp & ~(1 << 15));
+		pfb->num_tiles = NV10_PFB_TILE__SIZE;
+		break;
+	case 0x46: /* G72 */
+	case 0x47: /* G70 */
+	case 0x49: /* G71 */
+	case 0x4b: /* G73 */
+	case 0x4c: /* C51 (G7X version) */
+		pfb->num_tiles = NV40_PFB_TILE__SIZE_1;
+		break;
+	default:
+		pfb->num_tiles = NV40_PFB_TILE__SIZE_0;
+		break;
+	}
+
+	/* Turn all the tiling regions off. */
+	for (i = 0; i < pfb->num_tiles; i++)
+		pfb->set_region_tiling(dev, i, 0, 0, 0);
+
+	return 0;
+}
+
+void
+nv40_fb_takedown(struct drm_device *dev)
+{
+}