diff options
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_display.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_display.c | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c index 0e52cc532c26..7b253815a323 100644 --- a/drivers/gpu/drm/radeon/radeon_display.c +++ b/drivers/gpu/drm/radeon/radeon_display.c @@ -307,7 +307,7 @@ void radeon_crtc_handle_flip(struct radeon_device *rdev, int crtc_id) */ if (update_pending && (DRM_SCANOUTPOS_VALID & radeon_get_crtc_scanoutpos(rdev->ddev, crtc_id, - &vpos, &hpos)) && + &vpos, &hpos, NULL, NULL)) && ((vpos >= (99 * rdev->mode_info.crtcs[crtc_id]->base.hwmode.crtc_vdisplay)/100) || (vpos < 0 && !ASIC_IS_AVIVO(rdev)))) { /* crtc didn't flip in this target vblank interval, @@ -1596,12 +1596,17 @@ bool radeon_crtc_scaling_mode_fixup(struct drm_crtc *crtc, } /* - * Retrieve current video scanout position of crtc on a given gpu. + * Retrieve current video scanout position of crtc on a given gpu, and + * an optional accurate timestamp of when query happened. * * \param dev Device to query. * \param crtc Crtc to query. * \param *vpos Location where vertical scanout position should be stored. * \param *hpos Location where horizontal scanout position should go. + * \param *stime Target location for timestamp taken immediately before + * scanout position query. Can be NULL to skip timestamp. + * \param *etime Target location for timestamp taken immediately after + * scanout position query. Can be NULL to skip timestamp. * * Returns vpos as a positive number while in active scanout area. * Returns vpos as a negative number inside vblank, counting the number @@ -1617,7 +1622,8 @@ bool radeon_crtc_scaling_mode_fixup(struct drm_crtc *crtc, * unknown small number of scanlines wrt. real scanout position. * */ -int radeon_get_crtc_scanoutpos(struct drm_device *dev, int crtc, int *vpos, int *hpos) +int radeon_get_crtc_scanoutpos(struct drm_device *dev, int crtc, int *vpos, int *hpos, + ktime_t *stime, ktime_t *etime) { u32 stat_crtc = 0, vbl = 0, position = 0; int vbl_start, vbl_end, vtotal, ret = 0; @@ -1625,6 +1631,12 @@ int radeon_get_crtc_scanoutpos(struct drm_device *dev, int crtc, int *vpos, int struct radeon_device *rdev = dev->dev_private; + /* preempt_disable_rt() should go right here in PREEMPT_RT patchset. */ + + /* Get optional system timestamp before query. */ + if (stime) + *stime = ktime_get(); + if (ASIC_IS_DCE4(rdev)) { if (crtc == 0) { vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END + @@ -1707,6 +1719,12 @@ int radeon_get_crtc_scanoutpos(struct drm_device *dev, int crtc, int *vpos, int } } + /* Get optional system timestamp after query. */ + if (etime) + *etime = ktime_get(); + + /* preempt_enable_rt() should go right here in PREEMPT_RT patchset. */ + /* Decode into vertical and horizontal scanout position. */ *vpos = position & 0x1fff; *hpos = (position >> 16) & 0x1fff; |