From: =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig@amd.com>
Date: Thu, 22 Feb 2018 12:00:05 +0100
Subject: drm/ttm: add default implementations for ttm_tt_(un)populate
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Git-commit: e44fcf71f4092121f24b0d1b0c613a4e9c1e84e6
Patch-mainline: v4.17-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

Use ttm_pool_populate/ttm_pool_unpopulate if the driver doesn't provide
a function.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/ttm/ttm_tt.c |   10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

--- a/drivers/gpu/drm/ttm/ttm_tt.c
+++ b/drivers/gpu/drm/ttm/ttm_tt.c
@@ -410,7 +410,10 @@ int ttm_tt_populate(struct ttm_tt *ttm,
 	if (ttm->state != tt_unpopulated)
 		return 0;
 
-	ret = ttm->bdev->driver->ttm_tt_populate(ttm, ctx);
+	if (ttm->bdev->driver->ttm_tt_populate)
+		ret = ttm->bdev->driver->ttm_tt_populate(ttm, ctx);
+	else
+		ret = ttm_pool_populate(ttm, ctx);
 	if (!ret)
 		ttm_tt_add_mapping(ttm);
 	return ret;
@@ -436,5 +439,8 @@ void ttm_tt_unpopulate(struct ttm_tt *tt
 		return;
 
 	ttm_tt_clear_mapping(ttm);
-	ttm->bdev->driver->ttm_tt_unpopulate(ttm);
+	if (ttm->bdev->driver->ttm_tt_unpopulate)
+		ttm->bdev->driver->ttm_tt_unpopulate(ttm);
+	else
+		ttm_pool_unpopulate(ttm);
 }