From 18020e5e9647e218caf8f1566cdc053aac126f23 Mon Sep 17 00:00:00 2001
From: Dave Airlie <airlied@redhat.com>
Date: Thu, 14 Aug 2008 09:12:36 +1000
Subject: [PATCH] radeon: make buffer swap for older drivers work again on GEM

---
 linux-core/radeon_gem.c    | 47 ++++++++++++++++++++++++++++++++++++++++++++++
 shared-core/radeon_drv.h   |  1 +
 shared-core/radeon_state.c |  3 +++
 3 files changed, 51 insertions(+)

diff --git a/linux-core/radeon_gem.c b/linux-core/radeon_gem.c
index 250e685..058131e 100644
--- a/linux-core/radeon_gem.c
+++ b/linux-core/radeon_gem.c
@@ -1126,3 +1126,50 @@ static void radeon_gem_dma_bufs_destroy(struct drm_device *dev)
 	drm_bo_kunmap(&dev_priv->mm.dma_bufs.kmap);
 	drm_bo_usage_deref_unlocked(&dev_priv->mm.dma_bufs.bo);
 }
+
+
+static struct drm_gem_object *gem_object_get(struct drm_device *dev, uint32_t name)
+{
+	struct drm_gem_object *obj;
+
+	spin_lock(&dev->object_name_lock);
+	obj = idr_find(&dev->object_name_idr, name);
+	if (obj)
+		drm_gem_object_reference(obj);
+	spin_unlock(&dev->object_name_lock);
+	return obj;
+}
+
+void radeon_gem_update_offsets(struct drm_device *dev, struct drm_master *master)
+{
+	drm_radeon_private_t *dev_priv = dev->dev_private;
+	struct drm_radeon_master_private *master_priv = master->driver_priv;
+	drm_radeon_sarea_t *sarea_priv = master_priv->sarea_priv;
+	struct drm_gem_object *obj;
+	struct drm_radeon_gem_object *obj_priv;
+
+	/* update front_pitch_offset and back_pitch_offset */
+	DRM_ERROR("old front %x back %x\n", dev_priv->front_pitch_offset, dev_priv->back_pitch_offset);
+	obj = gem_object_get(dev, sarea_priv->front_handle);
+	if (obj) {
+		obj_priv = obj->driver_private;
+
+		dev_priv->front_offset = obj_priv->bo->offset;
+		dev_priv->front_pitch_offset = (((sarea_priv->front_pitch / 64) << 22) |
+						((obj_priv->bo->offset
+						  + dev_priv->fb_location) >> 10));
+		drm_gem_object_unreference(obj);
+	}
+
+	obj = gem_object_get(dev, sarea_priv->back_handle);
+	if (obj) {
+		obj_priv = obj->driver_private;
+		dev_priv->back_offset = obj_priv->bo->offset;
+		dev_priv->back_pitch_offset = (((sarea_priv->back_pitch / 64) << 22) |
+						((obj_priv->bo->offset
+						  + dev_priv->fb_location) >> 10));
+		drm_gem_object_unreference(obj);
+	}
+	dev_priv->color_fmt = RADEON_COLOR_FORMAT_ARGB8888;
+
+}
diff --git a/shared-core/radeon_drv.h b/shared-core/radeon_drv.h
index 138db79..aa5b4ba 100644
--- a/shared-core/radeon_drv.h
+++ b/shared-core/radeon_drv.h
@@ -1664,6 +1664,7 @@ extern void radeon_master_destroy(struct drm_device *dev, struct drm_master *mas
 extern void radeon_cp_dispatch_flip(struct drm_device * dev, struct drm_master *master);
 extern int radeon_cs_ioctl(struct drm_device *dev, void *data, struct drm_file *fpriv);
 extern int radeon_cs_init(struct drm_device *dev);
+void radeon_gem_update_offsets(struct drm_device *dev, struct drm_master *master);
 
 #define MARK_SAFE		1
 #define MARK_CHECK_OFFSET	2
diff --git a/shared-core/radeon_state.c b/shared-core/radeon_state.c
index 01ee71f..1a828be 100644
--- a/shared-core/radeon_state.c
+++ b/shared-core/radeon_state.c
@@ -2223,6 +2223,9 @@ static int radeon_cp_swap(struct drm_device *dev, void *data, struct drm_file *f
 	if (sarea_priv->nbox > RADEON_NR_SAREA_CLIPRECTS)
 		sarea_priv->nbox = RADEON_NR_SAREA_CLIPRECTS;
 
+	if (dev_priv->mm.vram_offset)
+		radeon_gem_update_offsets(dev, file_priv->master);
+
 	radeon_cp_dispatch_swap(dev, file_priv->master);
 	sarea_priv->ctx_owner = 0;
 
-- 
2.7.4