Preemption handling will get pushed into the kms drivers in followup patches, to make timestamping more robust and PREEMPT_RT friendly.
Signed-off-by: Mario Kleiner mario.kleiner.de@gmail.com Reviewed-by: Ville Syrjälä ville.syrjala@linux.intel.com Reviewed-by: Alex Deucher alexander.deucher@amd.com --- drivers/gpu/drm/drm_irq.c | 7 ------- 1 file changed, 7 deletions(-)
diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c index f9af048..33ee515 100644 --- a/drivers/gpu/drm/drm_irq.c +++ b/drivers/gpu/drm/drm_irq.c @@ -586,11 +586,6 @@ int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev, int crtc, * code gets preempted or delayed for some reason. */ for (i = 0; i < DRM_TIMESTAMP_MAXRETRIES; i++) { - /* Disable preemption to make it very likely to - * succeed in the first iteration even on PREEMPT_RT kernel. - */ - preempt_disable(); - /* Get system timestamp before query. */ stime = ktime_get();
@@ -602,8 +597,6 @@ int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev, int crtc, if (!drm_timestamp_monotonic) mono_time_offset = ktime_get_monotonic_offset();
- preempt_enable(); - /* Return as no-op if scanout query unsupported or failed. */ if (!(vbl_status & DRM_SCANOUTPOS_VALID)) { DRM_DEBUG("crtc %d : scanoutpos query failed [%d].\n",