Given Emil's tentative release plan, 3.13 will be almost two and half years old by the time this is released - seems fair to me.

Reviewed-by: Nicolai Hähnle <nicolai.haeh...@amd.com>

On 28.04.2016 08:21, Marek Olšák wrote:
From: Marek Olšák <marek.ol...@amd.com>

This will allow us to simplify a lot of code around tiling.

Kernel 3.10 is required for SI.
Kernel 3.13 is required for CIK.
---
  src/gallium/winsys/radeon/drm/radeon_drm_winsys.c | 20 ++++++++++++++------
  1 file changed, 14 insertions(+), 6 deletions(-)

diff --git a/src/gallium/winsys/radeon/drm/radeon_drm_winsys.c 
b/src/gallium/winsys/radeon/drm/radeon_drm_winsys.c
index 2d9ec8c..702d073 100644
--- a/src/gallium/winsys/radeon/drm/radeon_drm_winsys.c
+++ b/src/gallium/winsys/radeon/drm/radeon_drm_winsys.c
@@ -504,14 +504,22 @@ static boolean do_winsys_init(struct radeon_drm_winsys 
*ws)
          return FALSE;
      }

-    if (radeon_get_drm_value(ws->fd, RADEON_INFO_SI_TILE_MODE_ARRAY, NULL,
-                             ws->info.si_tile_mode_array)) {
-        ws->info.si_tile_mode_array_valid = TRUE;
+    if (ws->info.chip_class == CIK) {
+        if (!radeon_get_drm_value(ws->fd, 
RADEON_INFO_CIK_MACROTILE_MODE_ARRAY, NULL,
+                                  ws->info.cik_macrotile_mode_array)) {
+            fprintf(stderr, "radeon: Kernel 3.13 is required for CIK 
support.\n");
+            return FALSE;
+        }
+        ws->info.cik_macrotile_mode_array_valid = TRUE;
      }

-    if (radeon_get_drm_value(ws->fd, RADEON_INFO_CIK_MACROTILE_MODE_ARRAY, 
NULL,
-                             ws->info.cik_macrotile_mode_array)) {
-        ws->info.cik_macrotile_mode_array_valid = TRUE;
+    if (ws->info.chip_class >= SI) {
+        if (!radeon_get_drm_value(ws->fd, RADEON_INFO_SI_TILE_MODE_ARRAY, NULL,
+                                  ws->info.si_tile_mode_array)) {
+            fprintf(stderr, "radeon: Kernel 3.10 is required for SI 
support.\n");
+            return FALSE;
+        }
+        ws->info.si_tile_mode_array_valid = TRUE;
      }

      /* Hawaii with old firmware needs type2 nop packet.

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