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drm/radeon: 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.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
hifive-unleashed-5.1
Michel Dänzer 2015-05-26 17:53:39 +09:00 committed by Alex Deucher
parent 161ab658a6
commit b0b9bb4dd5
1 changed files with 7 additions and 1 deletions
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8
drivers/gpu/drm/radeon/radeon_irq_kms.c
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@ -145,7 +145,13 @@ void radeon_driver_irq_preinstall_kms(struct drm_device *dev)
*/
int radeon_driver_irq_postinstall_kms(struct drm_device *dev)
{
dev->max_vblank_count = 0x001fffff;
struct radeon_device *rdev = dev->dev_private;
if (ASIC_IS_AVIVO(rdev))
dev->max_vblank_count = 0x00ffffff;
else
dev->max_vblank_count = 0x001fffff;
return 0;
}