drm/radeon/kms: fix R3XX/R4XX memory controller initialization

Version 2 of memory controller did break the initialization for
R3XX/R4XX hardware. This patch fix it.

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/gpu/drm/radeon/r300.c b/drivers/gpu/drm/radeon/r300.c
index 7e9f95653cbe..b188aae764cc 100644
--- a/drivers/gpu/drm/radeon/r300.c
+++ b/drivers/gpu/drm/radeon/r300.c
@@ -461,7 +461,8 @@ int r300_gpu_reset(struct radeon_device *rdev)
  */
 void r300_mc_init(struct radeon_device *rdev)
 {
-        uint32_t tmp;
+        u64 base;
+        u32 tmp;
 
         /* DDR for all card after R300 & IGP */
         rdev->mc.vram_is_ddr = true;
@@ -474,6 +475,10 @@ void r300_mc_init(struct radeon_device *rdev)
         default:  rdev->mc.vram_width = 128; break;
         }
         r100_vram_init_sizes(rdev);
+        base = rdev->mc.aper_base;
+        if (rdev->flags & RADEON_IS_IGP)
+                base = (RREG32(RADEON_NB_TOM) & 0xffff) << 16;
+        radeon_vram_location(rdev, &rdev->mc, base);
         if (!(rdev->flags & RADEON_IS_AGP))
                 radeon_gtt_location(rdev, &rdev->mc);
 }