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drm/amdgpu: Fix max_vblank_count value for current display engines 

The value was much too low, which could cause the userspace visible
vblank counter to move backwards when the hardware counter wrapped
around.

Ported from radeon commit:
b0b9bb4dd5

Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Alex Deucher 2015-09-22 10:06:45 -04:00
parent 71affda522
commit 5a6adfa20b
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
View File

@ -140,7 +140,7 @@ void amdgpu_irq_preinstall(struct drm_device *dev)
*/
int amdgpu_irq_postinstall(struct drm_device *dev)
{
dev->max_vblank_count = 0x001fffff;
dev->max_vblank_count = 0x00ffffff;
return 0;
}