diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/drm/drm_drv.h | 7 | ||||
| -rw-r--r-- | include/drm/drm_modeset_helper_vtables.h | 47 | ||||
| -rw-r--r-- | include/drm/drm_vblank.h | 25 |
3 files changed, 74 insertions, 5 deletions
diff --git a/include/drm/drm_drv.h b/include/drm/drm_drv.h index 77685ed7aa65..8dd0d02647d3 100644 --- a/include/drm/drm_drv.h +++ b/include/drm/drm_drv.h @@ -362,11 +362,8 @@ struct drm_driver { * True on success, false if a reliable scanout position counter could * not be read out. * - * FIXME: - * - * Since this is a helper to implement @get_vblank_timestamp, we should - * move it to &struct drm_crtc_helper_funcs, like all the other - * helper-internal hooks. + * This is deprecated and should not be used by new drivers. + * Use &drm_crtc_helper_funcs.get_scanout_position instead. */ bool (*get_scanout_position) (struct drm_device *dev, unsigned int pipe, bool in_vblank_irq, int *vpos, int *hpos, diff --git a/include/drm/drm_modeset_helper_vtables.h b/include/drm/drm_modeset_helper_vtables.h index 5a87f1bd7a3f..e398512bfd5f 100644 --- a/include/drm/drm_modeset_helper_vtables.h +++ b/include/drm/drm_modeset_helper_vtables.h @@ -450,6 +450,53 @@ struct drm_crtc_helper_funcs { */ void (*atomic_disable)(struct drm_crtc *crtc, struct drm_crtc_state *old_crtc_state); + + /** + * @get_scanout_position: + * + * Called by vblank timestamping code. + * + * Returns the current display scanout position from a CRTC and an + * optional accurate ktime_get() timestamp of when the position was + * measured. Note that this is a helper callback which is only used + * if a driver uses drm_calc_vbltimestamp_from_scanoutpos() for the + * @drm_driver.get_vblank_timestamp callback. + * + * Parameters: + * + * crtc: + * The CRTC. + * in_vblank_irq: + * True when called from drm_crtc_handle_vblank(). Some drivers + * need to apply some workarounds for gpu-specific vblank irq + * quirks if the flag is set. + * vpos: + * Target location for current vertical scanout position. + * hpos: + * Target location for current horizontal scanout position. + * stime: + * Target location for timestamp taken immediately before + * scanout position query. Can be NULL to skip timestamp. + * etime: + * Target location for timestamp taken immediately after + * scanout position query. Can be NULL to skip timestamp. + * mode: + * Current display timings. + * + * Returns vpos as a positive number while in active scanout area. + * Returns vpos as a negative number inside vblank, counting the number + * of scanlines to go until end of vblank, e.g., -1 means "one scanline + * until start of active scanout / end of vblank." + * + * Returns: + * + * True on success, false if a reliable scanout position counter could + * not be read out. + */ + bool (*get_scanout_position)(struct drm_crtc *crtc, + bool in_vblank_irq, int *vpos, int *hpos, + ktime_t *stime, ktime_t *etime, + const struct drm_display_mode *mode); }; /** diff --git a/include/drm/drm_vblank.h b/include/drm/drm_vblank.h index 94275e93fd27..fd28741e64ed 100644 --- a/include/drm/drm_vblank.h +++ b/include/drm/drm_vblank.h @@ -239,4 +239,29 @@ void drm_calc_timestamping_constants(struct drm_crtc *crtc, wait_queue_head_t *drm_crtc_vblank_waitqueue(struct drm_crtc *crtc); void drm_crtc_set_max_vblank_count(struct drm_crtc *crtc, u32 max_vblank_count); + +typedef bool (*drm_vblank_get_scanout_position_func)(struct drm_crtc *crtc, + bool in_vblank_irq, + int *vpos, int *hpos, + ktime_t *stime, + ktime_t *etime, + const struct drm_display_mode *mode); + +typedef bool (*drm_vblank_get_scanout_position_legacy_func)(struct drm_device *dev, + unsigned int pipe, + bool in_vblank_irq, + int *vpos, + int *hpos, + ktime_t *stime, + ktime_t *etime, + const struct drm_display_mode *mode); + +bool +drm_crtc_vblank_helper_get_vblank_timestamp_internal(struct drm_crtc *crtc, + int *max_error, + ktime_t *vblank_time, + bool in_vblank_irq, + drm_vblank_get_scanout_position_func get_scanout_position, + drm_vblank_get_scanout_position_legacy_func get_scanout_position_legacy); + #endif |