diff options
Diffstat (limited to 'drivers/gpu/drm/drm_atomic_helper.c')
| -rw-r--r-- | drivers/gpu/drm/drm_atomic_helper.c | 119 |
1 files changed, 77 insertions, 42 deletions
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c index c3994b4d5f32..8be9719284b0 100644 --- a/drivers/gpu/drm/drm_atomic_helper.c +++ b/drivers/gpu/drm/drm_atomic_helper.c @@ -459,10 +459,20 @@ mode_fixup(struct drm_atomic_state *state) * * Check the state object to see if the requested state is physically possible. * This does all the crtc and connector related computations for an atomic - * update and adds any additional connectors needed for full modesets and calls - * down into &drm_crtc_helper_funcs.mode_fixup and - * &drm_encoder_helper_funcs.mode_fixup or - * &drm_encoder_helper_funcs.atomic_check functions of the driver backend. + * update and adds any additional connectors needed for full modesets. It calls + * the various per-object callbacks in the follow order: + * + * 1. &drm_connector_helper_funcs.atomic_best_encoder for determining the new encoder. + * 2. &drm_connector_helper_funcs.atomic_check to validate the connector state. + * 3. If it's determined a modeset is needed then all connectors on the affected crtc + * crtc are added and &drm_connector_helper_funcs.atomic_check is run on them. + * 4. &drm_bridge_funcs.mode_fixup is called on all encoder bridges. + * 5. &drm_encoder_helper_funcs.atomic_check is called to validate any encoder state. + * This function is only called when the encoder will be part of a configured crtc, + * it must not be used for implementing connector property validation. + * If this function is NULL, &drm_atomic_encoder_helper_funcs.mode_fixup is called + * instead. + * 6. &drm_crtc_helper_funcs.mode_fixup is called last, to fix up the mode with crtc constraints. * * &drm_crtc_state.mode_changed is set when the input mode is changed. * &drm_crtc_state.connectors_changed is set when a connector is added or @@ -492,8 +502,12 @@ drm_atomic_helper_check_modeset(struct drm_device *dev, struct drm_connector *connector; struct drm_connector_state *old_connector_state, *new_connector_state; int i, ret; + unsigned connectors_mask = 0; for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { + bool has_connectors = + !!new_crtc_state->connector_mask; + 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); @@ -515,13 +529,28 @@ drm_atomic_helper_check_modeset(struct drm_device *dev, new_crtc_state->mode_changed = true; new_crtc_state->connectors_changed = true; } + + if (old_crtc_state->active != new_crtc_state->active) { + DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active changed\n", + crtc->base.id, crtc->name); + new_crtc_state->active_changed = true; + } + + if (new_crtc_state->enable != has_connectors) { + DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled/connectors mismatch\n", + crtc->base.id, crtc->name); + + return -EINVAL; + } } - ret = handle_conflicting_encoders(state, state->legacy_set_config); + ret = handle_conflicting_encoders(state, false); if (ret) return ret; for_each_oldnew_connector_in_state(state, connector, old_connector_state, new_connector_state, i) { + const struct drm_connector_helper_funcs *funcs = connector->helper_private; + /* * This only sets crtc->connectors_changed for routing changes, * drivers must set crtc->connectors_changed themselves when @@ -539,6 +568,13 @@ drm_atomic_helper_check_modeset(struct drm_device *dev, new_connector_state->link_status) new_crtc_state->connectors_changed = true; } + + if (funcs->atomic_check) + ret = funcs->atomic_check(connector, new_connector_state); + if (ret) + return ret; + + connectors_mask += BIT(i); } /* @@ -548,20 +584,6 @@ drm_atomic_helper_check_modeset(struct drm_device *dev, * crtc only changed its mode but has the same set of connectors. */ for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { - bool has_connectors = - !!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 (old_crtc_state->active != new_crtc_state->active) { - DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active changed\n", - crtc->base.id, crtc->name); - new_crtc_state->active_changed = true; - } - if (!drm_atomic_crtc_needs_modeset(new_crtc_state)) continue; @@ -577,13 +599,22 @@ drm_atomic_helper_check_modeset(struct drm_device *dev, ret = drm_atomic_add_affected_planes(state, crtc); if (ret != 0) return ret; + } - if (new_crtc_state->enable != has_connectors) { - DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled/connectors mismatch\n", - crtc->base.id, crtc->name); + /* + * Iterate over all connectors again, to make sure atomic_check() + * has been called on them when a modeset is forced. + */ + for_each_oldnew_connector_in_state(state, connector, old_connector_state, new_connector_state, i) { + const struct drm_connector_helper_funcs *funcs = connector->helper_private; - return -EINVAL; - } + if (connectors_mask & BIT(i)) + continue; + + if (funcs->atomic_check) + ret = funcs->atomic_check(connector, new_connector_state); + if (ret) + return ret; } return mode_fixup(state); @@ -2289,12 +2320,15 @@ int drm_atomic_helper_set_config(struct drm_mode_set *set, if (!state) return -ENOMEM; - state->legacy_set_config = true; state->acquire_ctx = ctx; ret = __drm_atomic_helper_set_config(set, state); if (ret != 0) goto fail; + ret = handle_conflicting_encoders(state, true); + if (ret) + return ret; + ret = drm_atomic_commit(state); fail: @@ -2622,14 +2656,22 @@ EXPORT_SYMBOL(drm_atomic_helper_commit_duplicated_state); int drm_atomic_helper_resume(struct drm_device *dev, struct drm_atomic_state *state) { - struct drm_mode_config *config = &dev->mode_config; + struct drm_modeset_acquire_ctx ctx; int err; drm_mode_config_reset(dev); - drm_modeset_lock_all(dev); - err = drm_atomic_helper_commit_duplicated_state(state, config->acquire_ctx); - drm_modeset_unlock_all(dev); + drm_modeset_acquire_init(&ctx, 0); + while (1) { + err = drm_atomic_helper_commit_duplicated_state(state, &ctx); + if (err != -EDEADLK) + break; + + drm_modeset_backoff(&ctx); + } + + drm_modeset_drop_locks(&ctx); + drm_modeset_acquire_fini(&ctx); return err; } @@ -2975,7 +3017,7 @@ int drm_atomic_helper_connector_dpms(struct drm_connector *connector, if (!state) return -ENOMEM; - state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); + state->acquire_ctx = crtc->dev->mode_config.acquire_ctx; retry: crtc_state = drm_atomic_get_crtc_state(state, crtc); if (IS_ERR(crtc_state)) { @@ -3471,6 +3513,7 @@ EXPORT_SYMBOL(drm_atomic_helper_connector_destroy_state); * @green: green correction table * @blue: green correction table * @size: size of the tables + * @ctx: lock acquire context * * Implements support for legacy gamma correction table for drivers * that support color management through the DEGAMMA_LUT/GAMMA_LUT @@ -3478,7 +3521,8 @@ EXPORT_SYMBOL(drm_atomic_helper_connector_destroy_state); */ int drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green, u16 *blue, - uint32_t size) + uint32_t size, + struct drm_modeset_acquire_ctx *ctx) { struct drm_device *dev = crtc->dev; struct drm_mode_config *config = &dev->mode_config; @@ -3509,8 +3553,7 @@ int drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc, blob_data[i].blue = blue[i]; } - state->acquire_ctx = crtc->dev->mode_config.acquire_ctx; -retry: + state->acquire_ctx = ctx; crtc_state = drm_atomic_get_crtc_state(state, crtc); if (IS_ERR(crtc_state)) { ret = PTR_ERR(crtc_state); @@ -3534,18 +3577,10 @@ retry: goto fail; ret = drm_atomic_commit(state); -fail: - if (ret == -EDEADLK) - goto backoff; +fail: drm_atomic_state_put(state); drm_property_blob_put(blob); return ret; - -backoff: - drm_atomic_state_clear(state); - drm_atomic_legacy_backoff(state); - - goto retry; } EXPORT_SYMBOL(drm_atomic_helper_legacy_gamma_set); |