Acked-by: Roger He <hongbo...@amd.com>
-----Original Message-----
From: amd-gfx [mailto:amd-gfx-boun...@lists.freedesktop.org] On Behalf Of
Christian K?nig
Sent: Sunday, March 25, 2018 6:58 PM
To: linaro-mm-...@lists.linaro.org; linux-me...@vger.kernel.org;
dri-de...@lists.freedesktop.org; amd-gfx@lists.freedesktop.org;
sumit.sem...@linaro.org
Subject: [PATCH 3/5] drm/ttm: remove the backing store if no placement is given
Pipeline removal of the BOs backing store when the placement is given during
validation.
Signed-off-by: Christian König <christian.koe...@amd.com>
---
drivers/gpu/drm/ttm/ttm_bo.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c index
98e06f8bf23b..17e821f01d0a 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -1078,6 +1078,18 @@ int ttm_bo_validate(struct ttm_buffer_object *bo,
uint32_t new_flags;
reservation_object_assert_held(bo->resv);
+
+ /*
+ * Remove the backing store if no placement is given.
+ */
+ if (!placement->num_placement && !placement->num_busy_placement) {
+ ret = ttm_bo_pipeline_gutting(bo);
+ if (ret)
+ return ret;
+
+ return ttm_tt_create(bo, false);
+ }
+
/*
* Check whether we need to move buffer.
*/
--
2.14.1
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