From: Michel Dänzer Date: Tue, 26 May 2015 08:53:39 +0000 (+0900) Subject: drm/radeon: Fix max_vblank_count value for current display engines X-Git-Tag: firefly_0821_release~176^2~1470^2~48^2~1 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=b0b9bb4dd51f396dcf843831905f729e74b0c8c0;p=firefly-linux-kernel-4.4.55.git 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 Signed-off-by: Michel Dänzer Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/radeon/radeon_irq_kms.c b/drivers/gpu/drm/radeon/radeon_irq_kms.c index f682e5351252..1162bfa464f3 100644 --- a/drivers/gpu/drm/radeon/radeon_irq_kms.c +++ b/drivers/gpu/drm/radeon/radeon_irq_kms.c @@ -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; }