diff options
| -rw-r--r-- | drivers/gpu/drm/rcar-du/rcar_du_crtc.c | 4 | ||||
| -rw-r--r-- | drivers/gpu/drm/rcar-du/rcar_du_group.c | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/rcar-du/rcar_du_group.h | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/rcar-du/rcar_du_plane.c | 22 |
4 files changed, 28 insertions, 2 deletions
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c index b87b8ffb..e2560aa 100644 --- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c +++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c @@ -272,6 +272,10 @@ static void rcar_du_crtc_update_planes(struct rcar_du_crtc *rcrtc) rcar_du_group_restart(rcrtc->group); } + /* Restart the group if plane sources have changed. */ + if (rcrtc->group->need_restart) + rcar_du_group_restart(rcrtc->group); + mutex_unlock(&rcrtc->group->lock); rcar_du_group_write(rcrtc->group, rcrtc->index % 2 ? DS2PR : DS1PR, diff --git a/drivers/gpu/drm/rcar-du/rcar_du_group.c b/drivers/gpu/drm/rcar-du/rcar_du_group.c index 4a44ddd..0e2b46d 100644 --- a/drivers/gpu/drm/rcar-du/rcar_du_group.c +++ b/drivers/gpu/drm/rcar-du/rcar_du_group.c @@ -162,6 +162,8 @@ void rcar_du_group_start_stop(struct rcar_du_group *rgrp, bool start) void rcar_du_group_restart(struct rcar_du_group *rgrp) { + rgrp->need_restart = false; + __rcar_du_group_start_stop(rgrp, false); __rcar_du_group_start_stop(rgrp, true); } diff --git a/drivers/gpu/drm/rcar-du/rcar_du_group.h b/drivers/gpu/drm/rcar-du/rcar_du_group.h index 4b1952f..5e3adc6 100644 --- a/drivers/gpu/drm/rcar-du/rcar_du_group.h +++ b/drivers/gpu/drm/rcar-du/rcar_du_group.h @@ -32,6 +32,7 @@ struct rcar_du_device; * @dptsr_planes: bitmask of planes driven by dot-clock and timing generator 1 * @num_planes: number of planes in the group * @planes: planes handled by the group + * @need_restart: the group needs to be restarted due to a configuration change */ struct rcar_du_group { struct rcar_du_device *dev; @@ -47,6 +48,7 @@ struct rcar_du_group { unsigned int num_planes; struct rcar_du_plane planes[RCAR_DU_NUM_KMS_PLANES]; + bool need_restart; }; u32 rcar_du_group_read(struct rcar_du_group *rgrp, u32 reg); diff --git a/drivers/gpu/drm/rcar-du/rcar_du_plane.c b/drivers/gpu/drm/rcar-du/rcar_du_plane.c index cc38395..2fa5745 100644 --- a/drivers/gpu/drm/rcar-du/rcar_du_plane.c +++ b/drivers/gpu/drm/rcar-du/rcar_du_plane.c @@ -275,9 +275,27 @@ static void rcar_du_plane_atomic_update(struct drm_plane *plane, struct drm_plane_state *old_state) { struct rcar_du_plane *rplane = to_rcar_plane(plane); + struct rcar_du_plane_state *old_rstate; + struct rcar_du_plane_state *new_rstate; - if (plane->state->crtc) - rcar_du_plane_setup(rplane); + if (!plane->state->crtc) + return; + + rcar_du_plane_setup(rplane); + + /* Check whether the source has changed from memory to live source or + * from live source to memory. The source has been configured by the + * VSPS bit in the PnDDCR4 register. Although the datasheet states that + * the bit is updated during vertical blanking, it seems that updates + * only occur when the DU group is held in reset through the DSYSR.DRES + * bit. We thus need to restart the group if the source changes. + */ + old_rstate = to_rcar_plane_state(old_state); + new_rstate = to_rcar_plane_state(plane->state); + + if ((old_rstate->source == RCAR_DU_PLANE_MEMORY) != + (new_rstate->source == RCAR_DU_PLANE_MEMORY)) + rplane->group->need_restart = true; } static const struct drm_plane_helper_funcs rcar_du_plane_helper_funcs = { |
