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drm/radeon: clarify why we evict vram twice on suspend 

Update the comment to explain why we do this.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2016-10-10 12:42:33 -04:00
parent a0a71e49f5
commit ec9aaaff66
1 changed files with 4 additions and 1 deletions
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5
drivers/gpu/drm/radeon/radeon_device.c
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@ -1651,7 +1651,10 @@ int radeon_suspend_kms(struct drm_device *dev, bool suspend,
radeon_suspend(rdev);
radeon_hpd_fini(rdev);
/* evict remaining vram memory */
/* evict remaining vram memory
* This second call to evict vram is to evict the gart page table
* using the CPU.
*/
radeon_bo_evict_vram(rdev);
radeon_agp_suspend(rdev);