On Mon, Oct 17, 2016 at 02:37:06PM +0200, Maarten Lankhorst wrote:
> Signed-off-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/drm_atomic_helper.c | 302 +++++++++++++++++++-----------------
> 1 file changed, 157 insertions(+), 145 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
> index fcb6e5b55217..c8aba493fc17 100644
> --- a/drivers/gpu/drm/drm_atomic_helper.c
> +++ b/drivers/gpu/drm/drm_atomic_helper.c
> @@ -103,7 +103,7 @@ static int handle_conflicting_encoders(struct drm_atomic_state *state,
> * part of the state. If the same encoder is assigned to multiple
> * connectors bail out.
> */
> - for_each_connector_in_state(state, connector, conn_state, i) {
> + for_each_new_connector_in_state(state, connector, conn_state, i) {
> const struct drm_connector_helper_funcs *funcs = connector->helper_private;
> struct drm_encoder *new_encoder;
>
> @@ -238,22 +238,22 @@ steal_encoder(struct drm_atomic_state *state,
> {
> struct drm_crtc_state *crtc_state;
> struct drm_connector *connector;
> - struct drm_connector_state *connector_state;
> + struct drm_connector_state *old_connector_state, *new_connector_state;
> int i;
>
> - for_each_connector_in_state(state, connector, connector_state, i) {
> + for_each_oldnew_connector_in_state(state, connector, old_connector_state, new_connector_state, i) {
> struct drm_crtc *encoder_crtc;
>
> - if (connector_state->best_encoder != encoder)
> + if (new_connector_state->best_encoder != encoder)
> continue;
>
> - encoder_crtc = connector->state->crtc;
> + encoder_crtc = old_connector_state->crtc;
>
> DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s], stealing it\n",
> encoder->base.id, encoder->name,
> encoder_crtc->base.id, encoder_crtc->name);
>
> - set_best_encoder(state, connector_state, NULL);
> + set_best_encoder(state, new_connector_state, NULL);
>
> crtc_state = drm_atomic_get_existing_crtc_state(state, encoder_crtc);
> crtc_state->connectors_changed = true;
> @@ -265,7 +265,8 @@ steal_encoder(struct drm_atomic_state *state,
> static int
> update_connector_routing(struct drm_atomic_state *state,
> struct drm_connector *connector,
> - struct drm_connector_state *connector_state)
> + struct drm_connector_state *old_connector_state,
> + struct drm_connector_state *new_connector_state)
> {
> const struct drm_connector_helper_funcs *funcs;
> struct drm_encoder *new_encoder;
> @@ -275,24 +276,24 @@ update_connector_routing(struct drm_atomic_state *state,
> connector->base.id,
> connector->name);
>
> - if (connector->state->crtc != connector_state->crtc) {
> - if (connector->state->crtc) {
> - crtc_state = drm_atomic_get_existing_crtc_state(state, connector->state->crtc);
> + if (old_connector_state->crtc != new_connector_state->crtc) {
> + if (old_connector_state->crtc) {
> + crtc_state = drm_atomic_get_existing_crtc_state(state, old_connector_state->crtc);
> crtc_state->connectors_changed = true;
> }
>
> - if (connector_state->crtc) {
> - crtc_state = drm_atomic_get_existing_crtc_state(state, connector_state->crtc);
> + if (new_connector_state->crtc) {
> + crtc_state = drm_atomic_get_existing_crtc_state(state, new_connector_state->crtc);
> crtc_state->connectors_changed = true;
> }
> }
>
> - if (!connector_state->crtc) {
> + if (!new_connector_state->crtc) {
> DRM_DEBUG_ATOMIC("Disabling [CONNECTOR:%d:%s]\n",
> connector->base.id,
> connector->name);
>
> - set_best_encoder(state, connector_state, NULL);
> + set_best_encoder(state, new_connector_state, NULL);
>
> return 0;
> }
> @@ -301,7 +302,7 @@ update_connector_routing(struct drm_atomic_state *state,
>
> if (funcs->atomic_best_encoder)
> new_encoder = funcs->atomic_best_encoder(connector,
> - connector_state);
> + new_connector_state);
> else if (funcs->best_encoder)
> new_encoder = funcs->best_encoder(connector);
> else
> @@ -314,33 +315,33 @@ update_connector_routing(struct drm_atomic_state *state,
> return -EINVAL;
> }
>
> - if (!drm_encoder_crtc_ok(new_encoder, connector_state->crtc)) {
> + if (!drm_encoder_crtc_ok(new_encoder, new_connector_state->crtc)) {
> DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] incompatible with [CRTC:%d]\n",
> new_encoder->base.id,
> new_encoder->name,
> - connector_state->crtc->base.id);
> + new_connector_state->crtc->base.id);
> return -EINVAL;
> }
>
> - if (new_encoder == connector_state->best_encoder) {
> - set_best_encoder(state, connector_state, new_encoder);
> + if (new_encoder == new_connector_state->best_encoder) {
> + set_best_encoder(state, new_connector_state, new_encoder);
>
> DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] keeps [ENCODER:%d:%s], now on [CRTC:%d:%s]\n",
> connector->base.id,
> connector->name,
> new_encoder->base.id,
> new_encoder->name,
> - connector_state->crtc->base.id,
> - connector_state->crtc->name);
> + new_connector_state->crtc->base.id,
> + new_connector_state->crtc->name);
>
> return 0;
> }
>
> steal_encoder(state, new_encoder);
>
> - set_best_encoder(state, connector_state, new_encoder);
> + set_best_encoder(state, new_connector_state, new_encoder);
>
> - crtc_state = drm_atomic_get_existing_crtc_state(state, connector_state->crtc);
> + crtc_state = drm_atomic_get_existing_crtc_state(state, new_connector_state->crtc);
> crtc_state->connectors_changed = true;
>
> DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] using [ENCODER:%d:%s] on [CRTC:%d:%s]\n",
> @@ -348,8 +349,8 @@ update_connector_routing(struct drm_atomic_state *state,
> connector->name,
> new_encoder->base.id,
> new_encoder->name,
> - connector_state->crtc->base.id,
> - connector_state->crtc->name);
> + new_connector_state->crtc->base.id,
> + new_connector_state->crtc->name);
>
> return 0;
> }
> @@ -364,7 +365,7 @@ mode_fixup(struct drm_atomic_state *state)
> int i;
> bool ret;
>
> - for_each_crtc_in_state(state, crtc, crtc_state, i) {
> + for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
> if (!crtc_state->mode_changed &&
> !crtc_state->connectors_changed)
> continue;
> @@ -372,7 +373,7 @@ mode_fixup(struct drm_atomic_state *state)
> drm_mode_copy(&crtc_state->adjusted_mode, &crtc_state->mode);
> }
>
> - for_each_connector_in_state(state, connector, conn_state, i) {
> + for_each_new_connector_in_state(state, connector, conn_state, i) {
> const struct drm_encoder_helper_funcs *funcs;
> struct drm_encoder *encoder;
>
> @@ -417,7 +418,7 @@ mode_fixup(struct drm_atomic_state *state)
> }
> }
>
> - for_each_crtc_in_state(state, crtc, crtc_state, i) {
> + for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
> const struct drm_crtc_helper_funcs *funcs;
>
> if (!crtc_state->enable)
> @@ -476,19 +477,19 @@ drm_atomic_helper_check_modeset(struct drm_device *dev,
> struct drm_atomic_state *state)
> {
> struct drm_crtc *crtc;
> - struct drm_crtc_state *crtc_state;
> + struct drm_crtc_state *old_crtc_state, *new_crtc_state;
> struct drm_connector *connector;
> - struct drm_connector_state *connector_state;
> + struct drm_connector_state *old_connector_state, *new_connector_state;
> int i, ret;
>
> - for_each_crtc_in_state(state, crtc, crtc_state, i) {
> - if (!drm_mode_equal(&crtc->state->mode, &crtc_state->mode)) {
> + for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
> + if (!drm_mode_equal(&old_crtc_state->mode, &new_crtc_state->mode)) {
> DRM_DEBUG_ATOMIC("[CRTC:%d:%s] mode changed\n",
> crtc->base.id, crtc->name);
> - crtc_state->mode_changed = true;
> + new_crtc_state->mode_changed = true;
> }
>
> - if (crtc->state->enable != crtc_state->enable) {
> + if (old_crtc_state->enable != new_crtc_state->enable) {
> DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enable changed\n",
> crtc->base.id, crtc->name);
>
> @@ -500,8 +501,8 @@ drm_atomic_helper_check_modeset(struct drm_device *dev,
> * The other way around is true as well. enable != 0
> * iff connectors are attached and a mode is set.
> */
> - crtc_state->mode_changed = true;
> - crtc_state->connectors_changed = true;
> + new_crtc_state->mode_changed = true;
> + new_crtc_state->connectors_changed = true;
> }
> }
>
> @@ -509,14 +510,15 @@ drm_atomic_helper_check_modeset(struct drm_device *dev,
> if (ret)
> return ret;
>
> - for_each_connector_in_state(state, connector, connector_state, i) {
> + for_each_oldnew_connector_in_state(state, connector, old_connector_state, new_connector_state, i) {
> /*
> * This only sets crtc->connectors_changed for routing changes,
> * drivers must set crtc->connectors_changed themselves when
> * connector properties need to be updated.
> */
> ret = update_connector_routing(state, connector,
> - connector_state);
> + old_connector_state,
> + new_connector_state);
> if (ret)
> return ret;
> }
> @@ -527,28 +529,28 @@ drm_atomic_helper_check_modeset(struct drm_device *dev,
> * configuration. This must be done before calling mode_fixup in case a
> * crtc only changed its mode but has the same set of connectors.
> */
> - for_each_crtc_in_state(state, crtc, crtc_state, i) {
> + for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
> bool has_connectors =
> - !!crtc_state->connector_mask;
> + !!new_crtc_state->connector_mask;
>
> /*
> * We must set ->active_changed after walking connectors for
> * otherwise an update that only changes active would result in
> * a full modeset because update_connector_routing force that.
> */
> - if (crtc->state->active != crtc_state->active) {
> + if (old_crtc_state->active != new_crtc_state->active) {
> DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active changed\n",
> crtc->base.id, crtc->name);
> - crtc_state->active_changed = true;
> + new_crtc_state->active_changed = true;
> }
>
> - if (!drm_atomic_crtc_needs_modeset(crtc_state))
> + if (!drm_atomic_crtc_needs_modeset(new_crtc_state))
> continue;
>
> DRM_DEBUG_ATOMIC("[CRTC:%d:%s] needs all connectors, enable: %c, active: %c\n",
> crtc->base.id, crtc->name,
> - crtc_state->enable ? 'y' : 'n',
> - crtc_state->active ? 'y' : 'n');
> + new_crtc_state->enable ? 'y' : 'n',
> + new_crtc_state->active ? 'y' : 'n');
>
> ret = drm_atomic_add_affected_connectors(state, crtc);
> if (ret != 0)
> @@ -558,7 +560,7 @@ drm_atomic_helper_check_modeset(struct drm_device *dev,
> if (ret != 0)
> return ret;
>
> - if (crtc_state->enable != has_connectors) {
> + if (new_crtc_state->enable != has_connectors) {
> DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled/connectors mismatch\n",
> crtc->base.id, crtc->name);
>
> @@ -599,7 +601,7 @@ drm_atomic_helper_check_planes(struct drm_device *dev,
> if (ret)
> return ret;
>
> - for_each_plane_in_state(state, plane, plane_state, i) {
> + for_each_new_plane_in_state(state, plane, plane_state, i) {
> const struct drm_plane_helper_funcs *funcs;
>
> funcs = plane->helper_private;
> @@ -617,7 +619,7 @@ drm_atomic_helper_check_planes(struct drm_device *dev,
> }
> }
>
> - for_each_crtc_in_state(state, crtc, crtc_state, i) {
> + for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
> const struct drm_crtc_helper_funcs *funcs;
>
> funcs = crtc->helper_private;
Up to here everything runs in the check phase, so the straightforwared
s/state/new_state/ and s/foo->state/old_state/ looks correct.
> @@ -678,12 +680,12 @@ static void
> disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state)
> {
> struct drm_connector *connector;
> - struct drm_connector_state *old_conn_state;
> + struct drm_connector_state *old_conn_state, *new_conn_state;
> struct drm_crtc *crtc;
> - struct drm_crtc_state *old_crtc_state;
> + struct drm_crtc_state *old_crtc_state, *new_crtc_state;
> int i;
>
> - for_each_connector_in_state(old_state, connector, old_conn_state, i) {
> + for_each_oldnew_connector_in_state(old_state, connector, old_conn_state, new_conn_state, i) {
> const struct drm_encoder_helper_funcs *funcs;
> struct drm_encoder *encoder;
>
> @@ -720,7 +722,7 @@ disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state)
>
> /* Right function depends upon target state. */
> if (funcs) {
> - if (connector->state->crtc && funcs->prepare)
> + if (new_conn_state->crtc && funcs->prepare)
> funcs->prepare(encoder);
> else if (funcs->disable)
> funcs->disable(encoder);
> @@ -731,11 +733,11 @@ disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state)
> drm_bridge_post_disable(encoder->bridge);
> }
>
> - for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
> + for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) {
> const struct drm_crtc_helper_funcs *funcs;
>
> /* Shut down everything that needs a full modeset. */
> - if (!drm_atomic_crtc_needs_modeset(crtc->state))
> + if (!drm_atomic_crtc_needs_modeset(new_crtc_state))
> continue;
>
> if (!old_crtc_state->active)
> @@ -748,7 +750,7 @@ disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state)
>
>
> /* Right function depends upon target state. */
> - if (crtc->state->enable && funcs->prepare)
> + if (new_crtc_state->enable && funcs->prepare)
> funcs->prepare(crtc);
> else if (funcs->atomic_disable)
> funcs->atomic_disable(crtc, old_crtc_state);
And this sucker is executed after we've swapped the state, so we need to
do the s/foo->state/new_state/ replacement. Looks correct to me.
Not sure how worried I should be that we might forget some foo->state
dereference somewhere. Should we try rename that pointer to something else
to make sure we've caught everything?
> @@ -777,13 +779,13 @@ drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev,
> struct drm_atomic_state *old_state)
> {
> struct drm_connector *connector;
> - struct drm_connector_state *old_conn_state;
> + struct drm_connector_state *old_conn_state, *new_conn_state;
> struct drm_crtc *crtc;
> - struct drm_crtc_state *old_crtc_state;
> + struct drm_crtc_state *crtc_state;
> int i;
>
> /* clear out existing links and update dpms */
> - for_each_connector_in_state(old_state, connector, old_conn_state, i) {
> + for_each_oldnew_connector_in_state(old_state, connector, old_conn_state, new_conn_state, i) {
> if (connector->encoder) {
> WARN_ON(!connector->encoder->crtc);
>
> @@ -791,7 +793,7 @@ drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev,
> connector->encoder = NULL;
> }
>
> - crtc = connector->state->crtc;
> + crtc = new_conn_state->crtc;
> if ((!crtc && old_conn_state->crtc) ||
> (crtc && drm_atomic_crtc_needs_modeset(crtc->state))) {
^^^^^^^^^^^^
Like this guy here. That should be new_crtc_state, no?
> struct drm_property *dpms_prop =
> @@ -808,23 +810,23 @@ drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev,
> }
>
> /* set new links */
> - for_each_connector_in_state(old_state, connector, old_conn_state, i) {
> - if (!connector->state->crtc)
> + for_each_new_connector_in_state(old_state, connector, new_conn_state, i) {
> + if (!new_conn_state->crtc)
> continue;
>
> - if (WARN_ON(!connector->state->best_encoder))
> + if (WARN_ON(!new_conn_state->best_encoder))
> continue;
>
> - connector->encoder = connector->state->best_encoder;
> - connector->encoder->crtc = connector->state->crtc;
> + connector->encoder = new_conn_state->best_encoder;
> + connector->encoder->crtc = new_conn_state->crtc;
> }
>
> /* set legacy state in the crtc structure */
> - for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
> + for_each_new_crtc_in_state(old_state, crtc, crtc_state, i) {
> struct drm_plane *primary = crtc->primary;
>
> - crtc->mode = crtc->state->mode;
> - crtc->enabled = crtc->state->enable;
> + crtc->mode = crtc_state->mode;
> + crtc->enabled = crtc_state->enable;
>
> if (drm_atomic_get_existing_plane_state(old_state, primary) &&
> primary->state->crtc == crtc) {
^^^^^^^^^^^^^^
new_plane_state or something?
> @@ -832,9 +834,9 @@ drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev,
> crtc->y = primary->state->src_y >> 16;
> }
>
> - if (crtc->state->enable)
> + if (crtc_state->enable)
> drm_calc_timestamping_constants(crtc,
> - &crtc->state->adjusted_mode);
> + &crtc_state->adjusted_mode);
> }
> }
> EXPORT_SYMBOL(drm_atomic_helper_update_legacy_modeset_state);
> @@ -843,20 +845,20 @@ static void
> crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state)
> {
> struct drm_crtc *crtc;
> - struct drm_crtc_state *old_crtc_state;
> + struct drm_crtc_state *crtc_state;
> struct drm_connector *connector;
> - struct drm_connector_state *old_conn_state;
> + struct drm_connector_state *conn_state;
> int i;
>
> - for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
> + for_each_new_crtc_in_state(old_state, crtc, crtc_state, i) {
> const struct drm_crtc_helper_funcs *funcs;
>
> - if (!crtc->state->mode_changed)
> + if (!crtc_state->mode_changed)
> continue;
>
> funcs = crtc->helper_private;
>
> - if (crtc->state->enable && funcs->mode_set_nofb) {
> + if (crtc_state->enable && funcs->mode_set_nofb) {
> DRM_DEBUG_ATOMIC("modeset on [CRTC:%d:%s]\n",
> crtc->base.id, crtc->name);
>
> @@ -864,18 +866,18 @@ crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state)
> }
> }
>
> - for_each_connector_in_state(old_state, connector, old_conn_state, i) {
> + for_each_new_connector_in_state(old_state, connector, conn_state, i) {
> const struct drm_encoder_helper_funcs *funcs;
> struct drm_crtc_state *new_crtc_state;
> struct drm_encoder *encoder;
> struct drm_display_mode *mode, *adjusted_mode;
>
> - if (!connector->state->best_encoder)
> + if (!conn_state->best_encoder)
> continue;
>
> - encoder = connector->state->best_encoder;
> + encoder = conn_state->best_encoder;
> funcs = encoder->helper_private;
> - new_crtc_state = connector->state->crtc->state;
> + new_crtc_state = conn_state->crtc->state;
> mode = &new_crtc_state->mode;
> adjusted_mode = &new_crtc_state->adjusted_mode;
>
> @@ -891,7 +893,7 @@ crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state)
> */
> if (funcs && funcs->atomic_mode_set) {
> funcs->atomic_mode_set(encoder, new_crtc_state,
> - connector->state);
> + conn_state);
> } else if (funcs && funcs->mode_set) {
> funcs->mode_set(encoder, mode, adjusted_mode);
> }
> @@ -943,24 +945,24 @@ void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev,
> struct drm_atomic_state *old_state)
> {
> struct drm_crtc *crtc;
> - struct drm_crtc_state *old_crtc_state;
> + struct drm_crtc_state *crtc_state;
> struct drm_connector *connector;
> - struct drm_connector_state *old_conn_state;
> + struct drm_connector_state *conn_state;
> int i;
>
> - for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
> + for_each_new_crtc_in_state(old_state, crtc, crtc_state, i) {
> const struct drm_crtc_helper_funcs *funcs;
>
> /* Need to filter out CRTCs where only planes change. */
> - if (!drm_atomic_crtc_needs_modeset(crtc->state))
> + if (!drm_atomic_crtc_needs_modeset(crtc_state))
> continue;
>
> - if (!crtc->state->active)
> + if (!crtc_state->active)
> continue;
>
> funcs = crtc->helper_private;
>
> - if (crtc->state->enable) {
> + if (crtc_state->enable) {
> DRM_DEBUG_ATOMIC("enabling [CRTC:%d:%s]\n",
> crtc->base.id, crtc->name);
>
> @@ -971,18 +973,18 @@ void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev,
> }
> }
>
> - for_each_connector_in_state(old_state, connector, old_conn_state, i) {
> + for_each_new_connector_in_state(old_state, connector, conn_state, i) {
> const struct drm_encoder_helper_funcs *funcs;
> struct drm_encoder *encoder;
>
> - if (!connector->state->best_encoder)
> + if (!conn_state->best_encoder)
> continue;
>
> - if (!connector->state->crtc->state->active ||
> - !drm_atomic_crtc_needs_modeset(connector->state->crtc->state))
> + if (!conn_state->crtc->state->active ||
> + !drm_atomic_crtc_needs_modeset(conn_state->crtc->state))
More foo->state stuff remaining
> continue;
>
> - encoder = connector->state->best_encoder;
> + encoder = conn_state->best_encoder;
> funcs = encoder->helper_private;
>
> DRM_DEBUG_ATOMIC("enabling [ENCODER:%d:%s]\n",
> @@ -1027,10 +1029,7 @@ int drm_atomic_helper_wait_for_fences(struct drm_device *dev,
> struct drm_plane_state *plane_state;
> int i, ret;
>
> - for_each_plane_in_state(state, plane, plane_state, i) {
> - if (!pre_swap)
> - plane_state = plane->state;
> -
> + for_each_new_plane_in_state(state, plane, plane_state, i) {
Nice. Can we kill the pre_swap flag now? Hmm, no, we pass it to
dma_fence_wait() to indicate interruptible vs. not. Maybe we can rename
it to convey its only remaining function better?
> if (!plane_state->fence)
> continue;
>
> @@ -1072,15 +1071,15 @@ bool drm_atomic_helper_framebuffer_changed(struct drm_device *dev,
> struct drm_crtc *crtc)
> {
> struct drm_plane *plane;
> - struct drm_plane_state *old_plane_state;
> + struct drm_plane_state *old_plane_state, *new_plane_state;
> int i;
>
> - for_each_plane_in_state(old_state, plane, old_plane_state, i) {
> - if (plane->state->crtc != crtc &&
> + for_each_oldnew_plane_in_state(old_state, plane, old_plane_state, new_plane_state, i) {
> + if (new_plane_state->crtc != crtc &&
> old_plane_state->crtc != crtc)
> continue;
>
> - if (plane->state->fb != old_plane_state->fb)
> + if (new_plane_state->fb != old_plane_state->fb)
> return true;
> }
This thing was totally broken, but I guess now it actually should
work regardless of when we call it. Cool.
I was actually wonder if we manage to plumb the old+new state everywhere
maybe we could kill off some of the need_whatever flags? Not quite sure.
>
> @@ -1104,21 +1103,21 @@ drm_atomic_helper_wait_for_vblanks(struct drm_device *dev,
> struct drm_atomic_state *old_state)
> {
> struct drm_crtc *crtc;
> - struct drm_crtc_state *old_crtc_state;
> + struct drm_crtc_state *old_crtc_state, *new_crtc_state;
> int i, ret;
>
> - for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
> + /* Legacy cursor ioctls are completely unsynced, and userspace
> + * relies on that (by doing tons of cursor updates). */
> + if (old_state->legacy_cursor_update)
> + return;
> +
We seem to have a change of behaviour here. Should be in a separate
patch if we actually want it.
> + for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) {
> /* No one cares about the old state, so abuse it for tracking
> * and store whether we hold a vblank reference (and should do a
> * vblank wait) in the ->enable boolean. */
> old_crtc_state->enable = false;
>
> - if (!crtc->state->enable)
> - continue;
> -
> - /* Legacy cursor ioctls are completely unsynced, and userspace
> - * relies on that (by doing tons of cursor updates). */
> - if (old_state->legacy_cursor_update)
> + if (!new_crtc_state->enable)
> continue;
>
> if (!drm_atomic_helper_framebuffer_changed(dev,
> @@ -1133,7 +1132,7 @@ drm_atomic_helper_wait_for_vblanks(struct drm_device *dev,
> old_crtc_state->last_vblank_count = drm_crtc_vblank_count(crtc);
> }
>
> - for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
> + for_each_old_crtc_in_state(old_state, crtc, old_crtc_state, i) {
> if (!old_crtc_state->enable)
> continue;
>
I think pretty much evething up to this point (from the last checkpoint)
is executed after swapping the state, with
drm_atomic_helper_framebuffer_changed() being the oddball that might be
called from anywhere.
> @@ -1432,11 +1431,11 @@ int drm_atomic_helper_setup_commit(struct drm_atomic_state *state,
> bool nonblock)
> {
> struct drm_crtc *crtc;
> - struct drm_crtc_state *crtc_state;
> + struct drm_crtc_state *old_crtc_state, *crtc_state;
> struct drm_crtc_commit *commit;
> int i, ret;
>
> - for_each_crtc_in_state(state, crtc, crtc_state, i) {
> + for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, crtc_state, i) {
> commit = kzalloc(sizeof(*commit), GFP_KERNEL);
> if (!commit)
> return -ENOMEM;
> @@ -1457,7 +1456,7 @@ int drm_atomic_helper_setup_commit(struct drm_atomic_state *state,
> /* Drivers only send out events when at least either current or
> * new CRTC state is active. Complete right away if everything
> * stays off. */
> - if (!crtc->state->active && !crtc_state->active) {
> + if (!old_crtc_state->active && !crtc_state->active) {
> complete_all(&commit->flip_done);
> continue;
> }
This guy is pre state swap. Looks correct.
> @@ -1521,7 +1520,7 @@ void drm_atomic_helper_wait_for_dependencies(struct drm_atomic_state *state)
> int i;
> long ret;
>
> - for_each_crtc_in_state(state, crtc, crtc_state, i) {
> + for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
This is post state swap, but we don't actually use the new or the old
state here, so this looks fine.
> spin_lock(&crtc->commit_lock);
> commit = preceeding_commit(crtc);
> if (commit)
> @@ -1572,13 +1571,13 @@ void drm_atomic_helper_commit_hw_done(struct drm_atomic_state *state)
> struct drm_crtc_commit *commit;
> int i;
>
> - for_each_crtc_in_state(state, crtc, crtc_state, i) {
> + for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
> commit = state->crtcs[i].commit;
> if (!commit)
> continue;
>
> /* backend must have consumed any event by now */
> - WARN_ON(crtc->state->event);
> + WARN_ON(crtc_state->event);
Post swap. Looks correct.
> spin_lock(&crtc->commit_lock);
> complete_all(&commit->hw_done);
> spin_unlock(&crtc->commit_lock);
> @@ -1605,7 +1604,7 @@ void drm_atomic_helper_commit_cleanup_done(struct drm_atomic_state *state)
> int i;
> long ret;
>
> - for_each_crtc_in_state(state, crtc, crtc_state, i) {
> + for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
Post swap. State not used, so fine.
> commit = state->crtcs[i].commit;
> if (WARN_ON(!commit))
> continue;
> @@ -1658,7 +1657,7 @@ int drm_atomic_helper_prepare_planes(struct drm_device *dev,
> struct drm_plane_state *plane_state;
> int ret, i, j;
>
> - for_each_plane_in_state(state, plane, plane_state, i) {
> + for_each_new_plane_in_state(state, plane, plane_state, i) {
> const struct drm_plane_helper_funcs *funcs;
>
> funcs = plane->helper_private;
> @@ -1676,7 +1675,7 @@ int drm_atomic_helper_prepare_planes(struct drm_device *dev,
> return 0;
>
> fail:
> - for_each_plane_in_state(state, plane, plane_state, j) {
> + for_each_new_plane_in_state(state, plane, plane_state, j) {
Pre swap stuff. Fine.
> const struct drm_plane_helper_funcs *funcs;
>
> if (j >= i)
> @@ -1746,14 +1745,14 @@ void drm_atomic_helper_commit_planes(struct drm_device *dev,
> uint32_t flags)
> {
> struct drm_crtc *crtc;
> - struct drm_crtc_state *old_crtc_state;
> + struct drm_crtc_state *old_crtc_state, *new_crtc_state;
> struct drm_plane *plane;
> - struct drm_plane_state *old_plane_state;
> + struct drm_plane_state *old_plane_state, *new_plane_state;
> int i;
> bool active_only = flags & DRM_PLANE_COMMIT_ACTIVE_ONLY;
> bool no_disable = flags & DRM_PLANE_COMMIT_NO_DISABLE_AFTER_MODESET;
>
> - for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
> + for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) {
> const struct drm_crtc_helper_funcs *funcs;
>
> funcs = crtc->helper_private;
> @@ -1761,13 +1760,13 @@ void drm_atomic_helper_commit_planes(struct drm_device *dev,
> if (!funcs || !funcs->atomic_begin)
> continue;
>
> - if (active_only && !crtc->state->active)
> + if (active_only && !new_crtc_state->active)
> continue;
>
> funcs->atomic_begin(crtc, old_crtc_state);
> }
>
> - for_each_plane_in_state(old_state, plane, old_plane_state, i) {
> + for_each_oldnew_plane_in_state(old_state, plane, old_plane_state, new_plane_state, i) {
> const struct drm_plane_helper_funcs *funcs;
> bool disabling;
>
> @@ -1786,7 +1785,7 @@ void drm_atomic_helper_commit_planes(struct drm_device *dev,
> * CRTC to avoid skipping planes being disabled on an
> * active CRTC.
> */
> - if (!disabling && !plane_crtc_active(plane->state))
> + if (!disabling && !plane_crtc_active(new_plane_state))
> continue;
> if (disabling && !plane_crtc_active(old_plane_state))
> continue;
> @@ -1805,12 +1804,12 @@ void drm_atomic_helper_commit_planes(struct drm_device *dev,
> continue;
>
> funcs->atomic_disable(plane, old_plane_state);
> - } else if (plane->state->crtc || disabling) {
> + } else if (new_plane_state->crtc || disabling) {
> funcs->atomic_update(plane, old_plane_state);
> }
> }
>
> - for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
> + for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) {
> const struct drm_crtc_helper_funcs *funcs;
>
> funcs = crtc->helper_private;
> @@ -1818,7 +1817,7 @@ void drm_atomic_helper_commit_planes(struct drm_device *dev,
> if (!funcs || !funcs->atomic_flush)
> continue;
>
> - if (active_only && !crtc->state->active)
> + if (active_only && !new_crtc_state->active)
> continue;
>
> funcs->atomic_flush(crtc, old_crtc_state);
> @@ -1945,12 +1944,19 @@ void drm_atomic_helper_cleanup_planes(struct drm_device *dev,
> struct drm_atomic_state *old_state)
> {
> struct drm_plane *plane;
> - struct drm_plane_state *plane_state;
> + struct drm_plane_state *plane_state, *new_plane_state;
> int i;
>
> - for_each_plane_in_state(old_state, plane, plane_state, i) {
> + for_each_oldnew_plane_in_state(old_state, plane, plane_state, new_plane_state, i) {
> const struct drm_plane_helper_funcs *funcs;
>
> + /*
> + * This might be called before swapping when commit is aborted,
> + * in which case we have to free the new state.
> + */
> + if (plane_state == plane->state)
> + plane_state = new_plane_state;
Oh dear. Can we make this nicer somehow? I can't actually see any use
like that currently. Am I blind?
I was wondering if we should add some kind of asserts to a bunch of
these functions to make sure they are called during the correct phase
of the operation. We could track the progress in the top level state I
guess.
> +
> if (!drm_atomic_helper_framebuffer_changed(dev, old_state, plane_state->crtc))
> continue;
>
> @@ -1998,15 +2004,15 @@ void drm_atomic_helper_swap_state(struct drm_atomic_state *state,
> int i;
> long ret;
> struct drm_connector *connector;
> - struct drm_connector_state *conn_state;
> + struct drm_connector_state *old_conn_state, *new_conn_state;
> struct drm_crtc *crtc;
> - struct drm_crtc_state *crtc_state;
> + struct drm_crtc_state *old_crtc_state, *new_crtc_state;
> struct drm_plane *plane;
> - struct drm_plane_state *plane_state;
> + struct drm_plane_state *old_plane_state, *new_plane_state;
> struct drm_crtc_commit *commit;
>
> if (stall) {
> - for_each_crtc_in_state(state, crtc, crtc_state, i) {
> + for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
> spin_lock(&crtc->commit_lock);
> commit = list_first_entry_or_null(&crtc->commit_list,
> struct drm_crtc_commit, commit_entry);
> @@ -2026,16 +2032,20 @@ void drm_atomic_helper_swap_state(struct drm_atomic_state *state,
> }
> }
>
> - for_each_connector_in_state(state, connector, conn_state, i) {
> - connector->state->state = state;
> - swap(state->connectors[i].state, connector->state);
> - connector->state->state = NULL;
> + for_each_oldnew_connector_in_state(state, connector, old_conn_state, new_conn_state, i) {
> + old_conn_state->state = state;
> + new_conn_state->state = NULL;
> +
> + state->connectors[i].state = old_conn_state;
> + connector->state = new_conn_state;
> }
>
> - for_each_crtc_in_state(state, crtc, crtc_state, i) {
> - crtc->state->state = state;
> - swap(state->crtcs[i].state, crtc->state);
> - crtc->state->state = NULL;
> + for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
> + old_crtc_state->state = state;
> + new_crtc_state->state = NULL;
> +
> + state->crtcs[i].state = old_crtc_state;
> + crtc->state = new_crtc_state;
>
> if (state->crtcs[i].commit) {
> spin_lock(&crtc->commit_lock);
> @@ -2047,10 +2057,12 @@ void drm_atomic_helper_swap_state(struct drm_atomic_state *state,
> }
> }
>
> - for_each_plane_in_state(state, plane, plane_state, i) {
> - plane->state->state = state;
> - swap(state->planes[i].state, plane->state);
> - plane->state->state = NULL;
> + for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) {
> + old_plane_state->state = state;
> + new_plane_state->state = NULL;
> +
> + state->planes[i].state = old_plane_state;
> + plane->state = new_plane_state;
> }
> }
lgtm
> EXPORT_SYMBOL(drm_atomic_helper_swap_state);
> @@ -2248,7 +2260,7 @@ static int update_output_state(struct drm_atomic_state *state,
> if (ret)
> return ret;
>
> - for_each_connector_in_state(state, connector, conn_state, i) {
> + for_each_new_connector_in_state(state, connector, conn_state, i) {
> if (conn_state->crtc == set->crtc) {
> ret = drm_atomic_set_crtc_for_connector(conn_state,
> NULL);
> @@ -2270,7 +2282,7 @@ static int update_output_state(struct drm_atomic_state *state,
> return ret;
> }
>
> - for_each_crtc_in_state(state, crtc, crtc_state, i) {
> + for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
> /* Don't update ->enable for the CRTC in the set_config request,
> * since a mismatch would indicate a bug in the upper layers.
> * The actual modeset code later on will catch any
Building up the new state. Looks correct.
Phew! Apart from some of the lingering foo->state dereferences and the
change in behaviour for legacy cursors, and the slight oddballness in
the plane_cleanup() I didn't spot anything wrong.
This thing could use a commit message I think. Could at least lay out
the basic rules on the foo->state/foo_state vs. old_state/new_state
replacements. Might help someone understand it who doesn't know so much
about the current state swapping mechanism.
--
Ville Syrjälä
Intel OTC
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