drm/amdgpu/display: handle gfx12 in dm_check_cursor_fb

Checking SWIZZLE_MODE has undefined behavior on gfx12.
Signed-off-by: Marek Olšák <marek.olsak@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

@@ -10667,12 +10667,14 @@ static int dm_check_cursor_fb(struct amdgpu_crtc *new_acrtc,
 	 * check tiling flags when the FB doesn't have a modifier.
 	 */
 	if (!(fb->flags & DRM_MODE_FB_MODIFIERS)) {
-		if (adev->family < AMDGPU_FAMILY_AI) {
+		if (adev->family >= AMDGPU_FAMILY_GC_12_0_0) {
+			linear = AMDGPU_TILING_GET(afb->tiling_flags, GFX12_SWIZZLE_MODE) == 0;
+		} else if (adev->family >= AMDGPU_FAMILY_AI) {
+			linear = AMDGPU_TILING_GET(afb->tiling_flags, SWIZZLE_MODE) == 0;
+		} else {
 			linear = AMDGPU_TILING_GET(afb->tiling_flags, ARRAY_MODE) != DC_ARRAY_2D_TILED_THIN1 &&
 				 AMDGPU_TILING_GET(afb->tiling_flags, ARRAY_MODE) != DC_ARRAY_1D_TILED_THIN1 &&
 				 AMDGPU_TILING_GET(afb->tiling_flags, MICRO_TILE_MODE) == 0;
-		} else {
-			linear = AMDGPU_TILING_GET(afb->tiling_flags, SWIZZLE_MODE) == 0;
 		}
 		if (!linear) {
 			DRM_DEBUG_ATOMIC("Cursor FB not linear");