2 files changed, 5 insertions, 2 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_cp.c b/drivers/gpu/drm/radeon/radeon_cp.c
index e6e0c2933efd..a83d7615ba7f 100644
--- a/drivers/gpu/drm/radeon/radeon_cp.c
+++ b/drivers/gpu/drm/radeon/radeon_cp.c
@@ -133,9 +133,10 @@ static void radeon_write_agp_base(drm_radeon_private_t *dev_priv, u64 agp_base)
         } else if ((dev_priv->flags & RADEON_FAMILY_MASK) > CHIP_RV515) {
                 R500_WRITE_MCIND(R520_MC_AGP_BASE, agp_base_lo);
                 R500_WRITE_MCIND(R520_MC_AGP_BASE_2, agp_base_hi);
-        } else if ((dev_priv->flags & RADEON_FAMILY_MASK) == CHIP_RS480) {
+        } else if (((dev_priv->flags & RADEON_FAMILY_MASK) == CHIP_RS400) ||
+                   ((dev_priv->flags & RADEON_FAMILY_MASK) == CHIP_RS480)) {
                 RADEON_WRITE(RADEON_AGP_BASE, agp_base_lo);
-                RADEON_WRITE(RS480_AGP_BASE_2, 0);
+                RADEON_WRITE(RS480_AGP_BASE_2, agp_base_hi);
         } else {
                 RADEON_WRITE(RADEON_AGP_BASE, agp_base_lo);
                 if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_R200)
@@ -352,6 +353,7 @@ static void radeon_cp_load_microcode(drm_radeon_private_t * dev_priv)
                    ((dev_priv->flags & RADEON_FAMILY_MASK) == CHIP_R350) ||
                    ((dev_priv->flags & RADEON_FAMILY_MASK) == CHIP_RV350) ||
                    ((dev_priv->flags & RADEON_FAMILY_MASK) == CHIP_RV380) ||
+                   ((dev_priv->flags & RADEON_FAMILY_MASK) == CHIP_RS400) ||
                    ((dev_priv->flags & RADEON_FAMILY_MASK) == CHIP_RS480)) {
                 DRM_INFO("Loading R300 Microcode\n");
                 for (i = 0; i < 256; i++) {
diff --git a/drivers/gpu/drm/radeon/radeon_drv.h b/drivers/gpu/drm/radeon/radeon_drv.h
index 9d752bc0602b..9278429af9ed 100644
--- a/drivers/gpu/drm/radeon/radeon_drv.h
+++ b/drivers/gpu/drm/radeon/radeon_drv.h
@@ -123,6 +123,7 @@ enum radeon_family {
         CHIP_RV380,
         CHIP_R420,
         CHIP_RV410,
+        CHIP_RS400,
         CHIP_RS480,
         CHIP_RS690,
         CHIP_RS740,