+ switch (tiling_config & 0xf) {
+ case 0:
+ rscreen->tiling_info.num_channels = 1;
+ break;
+ case 1:
+ rscreen->tiling_info.num_channels = 2;
+ break;
+ case 2:
+ rscreen->tiling_info.num_channels = 4;
+ break;
+ case 3:
+ rscreen->tiling_info.num_channels = 8;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch ((tiling_config & 0xf0) >> 4) {
+ case 0:
+ rscreen->tiling_info.num_banks = 4;
+ break;
+ case 1:
+ rscreen->tiling_info.num_banks = 8;
+ break;
+ case 2:
+ rscreen->tiling_info.num_banks = 16;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch ((tiling_config & 0xf00) >> 8) {
+ case 0:
+ rscreen->tiling_info.group_bytes = 256;
+ break;
+ case 1:
+ rscreen->tiling_info.group_bytes = 512;
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int r600_init_tiling(struct r600_screen *rscreen)
+{
+ uint32_t tiling_config = rscreen->info.r600_tiling_config;
+
+ /* set default group bytes, overridden by tiling info ioctl */
+ if (rscreen->chip_class <= R700) {
+ rscreen->tiling_info.group_bytes = 256;
+ } else {
+ rscreen->tiling_info.group_bytes = 512;
+ }