diff options
Diffstat (limited to 'drivers/gpu/drm/vkms/vkms_crc.c')
| -rw-r--r-- | drivers/gpu/drm/vkms/vkms_crc.c | 36 |
1 files changed, 34 insertions, 2 deletions
diff --git a/drivers/gpu/drm/vkms/vkms_crc.c b/drivers/gpu/drm/vkms/vkms_crc.c index ed47d67cecd6..68db42f15086 100644 --- a/drivers/gpu/drm/vkms/vkms_crc.c +++ b/drivers/gpu/drm/vkms/vkms_crc.c @@ -34,6 +34,15 @@ out: return crc; } +/** + * vkms_crc_work_handle - ordered work_struct to compute CRC + * + * @work: work_struct + * + * Work handler for computing CRCs. work_struct scheduled in + * an ordered workqueue that's periodically scheduled to run by + * _vblank_handle() and flushed at vkms_atomic_crtc_destroy_state(). + */ void vkms_crc_work_handle(struct work_struct *work) { struct vkms_crtc_state *crtc_state = container_of(work, @@ -45,8 +54,18 @@ void vkms_crc_work_handle(struct work_struct *work) output); struct vkms_crc_data *primary_crc = NULL; struct drm_plane *plane; - u32 crc32 = 0; + u64 frame_start, frame_end; + unsigned long flags; + + spin_lock_irqsave(&out->state_lock, flags); + frame_start = crtc_state->frame_start; + frame_end = crtc_state->frame_end; + spin_unlock_irqrestore(&out->state_lock, flags); + + /* _vblank_handle() hasn't updated frame_start yet */ + if (!frame_start || frame_start == frame_end) + goto out; drm_for_each_plane(plane, &vdev->drm) { struct vkms_plane_state *vplane_state; @@ -67,7 +86,20 @@ void vkms_crc_work_handle(struct work_struct *work) if (primary_crc) crc32 = _vkms_get_crc(primary_crc); - drm_crtc_add_crc_entry(crtc, true, crtc_state->n_frame, &crc32); + frame_end = drm_crtc_accurate_vblank_count(crtc); + + /* queue_work can fail to schedule crc_work; add crc for + * missing frames + */ + while (frame_start <= frame_end) + drm_crtc_add_crc_entry(crtc, true, frame_start++, &crc32); + +out: + /* to avoid using the same value for frame number again */ + spin_lock_irqsave(&out->state_lock, flags); + crtc_state->frame_end = frame_end; + crtc_state->frame_start = 0; + spin_unlock_irqrestore(&out->state_lock, flags); } static int vkms_crc_parse_source(const char *src_name, bool *enabled) |