drm/radeon: fix bank tiling parameters on cayman

Handle the 16 bank case.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

diff --git a/drivers/gpu/drm/radeon/ni.c b/drivers/gpu/drm/radeon/ni.c
index 9945d86..853800e 100644 (file)
--- a/drivers/gpu/drm/radeon/ni.c
+++ b/drivers/gpu/drm/radeon/ni.c
@@ -574,10 +574,18 @@ static void cayman_gpu_init(struct radeon_device *rdev)
        if (rdev->flags & RADEON_IS_IGP)
                rdev->config.cayman.tile_config |= 1 << 4;
        else {
-               if ((mc_arb_ramcfg & NOOFBANK_MASK) >> NOOFBANK_SHIFT)
-                       rdev->config.cayman.tile_config |= 1 << 4;
-               else
+               switch ((mc_arb_ramcfg & NOOFBANK_MASK) >> NOOFBANK_SHIFT) {
+               case 0: /* four banks */
                        rdev->config.cayman.tile_config |= 0 << 4;
+                       break;
+               case 1: /* eight banks */
+                       rdev->config.cayman.tile_config |= 1 << 4;
+                       break;
+               case 2: /* sixteen banks */
+               default:
+                       rdev->config.cayman.tile_config |= 2 << 4;
+                       break;
+               }
        }
        rdev->config.cayman.tile_config |=
                ((gb_addr_config & PIPE_INTERLEAVE_SIZE_MASK) >> PIPE_INTERLEAVE_SIZE_SHIFT) << 8;