drm/radeon/kms: fix tiling info on evergreen
Alex Deucher [Wed, 17 Nov 2010 17:11:03 +0000 (12:11 -0500)]
We aren't currently using tiling in userspace on evergreen,
but the info we currently return for the tiling info query
(gb_addr_config) is no adequate for userspace tiling alignment
calculations.  It does not contain the bank info.  Create a custom
tiling info dword with all the necessary info (num channels,
num banks, group size, row size).

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/radeon/evergreen.c

index 488c36c..4dc5b47 100644 (file)
@@ -1650,7 +1650,36 @@ static void evergreen_gpu_init(struct radeon_device *rdev)
                }
        }
 
-       rdev->config.evergreen.tile_config = gb_addr_config;
+       /* setup tiling info dword.  gb_addr_config is not adequate since it does
+        * not have bank info, so create a custom tiling dword.
+        * bits 3:0   num_pipes
+        * bits 7:4   num_banks
+        * bits 11:8  group_size
+        * bits 15:12 row_size
+        */
+       rdev->config.evergreen.tile_config = 0;
+       switch (rdev->config.evergreen.max_tile_pipes) {
+       case 1:
+       default:
+               rdev->config.evergreen.tile_config |= (0 << 0);
+               break;
+       case 2:
+               rdev->config.evergreen.tile_config |= (1 << 0);
+               break;
+       case 4:
+               rdev->config.evergreen.tile_config |= (2 << 0);
+               break;
+       case 8:
+               rdev->config.evergreen.tile_config |= (3 << 0);
+               break;
+       }
+       rdev->config.evergreen.tile_config |=
+               ((mc_arb_ramcfg & NOOFBANK_MASK) >> NOOFBANK_SHIFT) << 4;
+       rdev->config.evergreen.tile_config |=
+               ((mc_arb_ramcfg & BURSTLENGTH_MASK) >> BURSTLENGTH_SHIFT) << 8;
+       rdev->config.evergreen.tile_config |=
+               ((gb_addr_config & 0x30000000) >> 28) << 12;
+
        WREG32(GB_BACKEND_MAP, gb_backend_map);
        WREG32(GB_ADDR_CONFIG, gb_addr_config);
        WREG32(DMIF_ADDR_CONFIG, gb_addr_config);