From 03dd4cb26d967f9588437b0fc9cc0e8353322bb7 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Fri, 25 Mar 2016 03:53:42 -0300 Subject: Linux-libre 4.5-gnu --- drivers/gpu/drm/drm_atomic_helper.c | 398 +++++++++++++++++++++++++++++++----- 1 file changed, 343 insertions(+), 55 deletions(-) (limited to 'drivers/gpu/drm/drm_atomic_helper.c') diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c index e5aec45bf..4f2d3e161 100644 --- a/drivers/gpu/drm/drm_atomic_helper.c +++ b/drivers/gpu/drm/drm_atomic_helper.c @@ -52,6 +52,12 @@ * drm_atomic_helper_disable_plane(), drm_atomic_helper_disable_plane() and the * various functions to implement set_property callbacks. New drivers must not * implement these functions themselves but must use the provided helpers. + * + * The atomic helper uses the same function table structures as all other + * modesetting helpers. See the documentation for struct &drm_crtc_helper_funcs, + * struct &drm_encoder_helper_funcs and struct &drm_connector_helper_funcs. It + * also shares the struct &drm_plane_helper_funcs function table with the plane + * helpers. */ static void drm_atomic_helper_plane_changed(struct drm_atomic_state *state, @@ -80,6 +86,26 @@ drm_atomic_helper_plane_changed(struct drm_atomic_state *state, } } +static bool +check_pending_encoder_assignment(struct drm_atomic_state *state, + struct drm_encoder *new_encoder) +{ + struct drm_connector *connector; + struct drm_connector_state *conn_state; + int i; + + for_each_connector_in_state(state, connector, conn_state, i) { + if (conn_state->best_encoder != new_encoder) + continue; + + /* encoder already assigned and we're trying to re-steal it! */ + if (connector->state->best_encoder != conn_state->best_encoder) + return false; + } + + return true; +} + static struct drm_crtc * get_current_crtc_for_encoder(struct drm_device *dev, struct drm_encoder *encoder) @@ -116,9 +142,9 @@ steal_encoder(struct drm_atomic_state *state, */ WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); - DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d], stealing it\n", + 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->base.id, encoder_crtc->name); crtc_state = drm_atomic_get_crtc_state(state, encoder_crtc); if (IS_ERR(crtc_state)) @@ -219,16 +245,24 @@ update_connector_routing(struct drm_atomic_state *state, int conn_idx) } if (new_encoder == connector_state->best_encoder) { - DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] keeps [ENCODER:%d:%s], now on [CRTC:%d]\n", + 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->base.id, + connector_state->crtc->name); return 0; } + if (!check_pending_encoder_assignment(state, new_encoder)) { + DRM_DEBUG_ATOMIC("Encoder for [CONNECTOR:%d:%s] already assigned\n", + connector->base.id, + connector->name); + return -EINVAL; + } + encoder_crtc = get_current_crtc_for_encoder(state->dev, new_encoder); @@ -251,12 +285,13 @@ update_connector_routing(struct drm_atomic_state *state, int conn_idx) crtc_state = state->crtc_states[idx]; crtc_state->connectors_changed = true; - DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] using [ENCODER:%d:%s] on [CRTC:%d]\n", + DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] using [ENCODER:%d:%s] 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->base.id, + connector_state->crtc->name); return 0; } @@ -340,8 +375,8 @@ mode_fixup(struct drm_atomic_state *state) ret = funcs->mode_fixup(crtc, &crtc_state->mode, &crtc_state->adjusted_mode); if (!ret) { - DRM_DEBUG_ATOMIC("[CRTC:%d] fixup failed\n", - crtc->base.id); + DRM_DEBUG_ATOMIC("[CRTC:%d:%s] fixup failed\n", + crtc->base.id, crtc->name); return -EINVAL; } } @@ -388,14 +423,14 @@ drm_atomic_helper_check_modeset(struct drm_device *dev, for_each_crtc_in_state(state, crtc, crtc_state, i) { if (!drm_mode_equal(&crtc->state->mode, &crtc_state->mode)) { - DRM_DEBUG_ATOMIC("[CRTC:%d] mode changed\n", - crtc->base.id); + DRM_DEBUG_ATOMIC("[CRTC:%d:%s] mode changed\n", + crtc->base.id, crtc->name); crtc_state->mode_changed = true; } if (crtc->state->enable != crtc_state->enable) { - DRM_DEBUG_ATOMIC("[CRTC:%d] enable changed\n", - crtc->base.id); + DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enable changed\n", + crtc->base.id, crtc->name); /* * For clarity this assignment is done here, but @@ -428,7 +463,8 @@ drm_atomic_helper_check_modeset(struct drm_device *dev, * crtc only changed its mode but has the same set of connectors. */ for_each_crtc_in_state(state, crtc, crtc_state, i) { - int num_connectors; + bool has_connectors = + !!crtc_state->connector_mask; /* * We must set ->active_changed after walking connectors for @@ -436,18 +472,18 @@ drm_atomic_helper_check_modeset(struct drm_device *dev, * a full modeset because update_connector_routing force that. */ if (crtc->state->active != crtc_state->active) { - DRM_DEBUG_ATOMIC("[CRTC:%d] active changed\n", - crtc->base.id); + DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active changed\n", + crtc->base.id, crtc->name); crtc_state->active_changed = true; } if (!drm_atomic_crtc_needs_modeset(crtc_state)) continue; - DRM_DEBUG_ATOMIC("[CRTC:%d] needs all connectors, enable: %c, active: %c\n", - crtc->base.id, + 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'); + crtc_state->active ? 'y' : 'n'); ret = drm_atomic_add_affected_connectors(state, crtc); if (ret != 0) @@ -457,12 +493,9 @@ drm_atomic_helper_check_modeset(struct drm_device *dev, if (ret != 0) return ret; - num_connectors = drm_atomic_connectors_for_crtc(state, - crtc); - - if (crtc_state->enable != !!num_connectors) { - DRM_DEBUG_ATOMIC("[CRTC:%d] enabled/connectors mismatch\n", - crtc->base.id); + if (crtc_state->enable != has_connectors) { + DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled/connectors mismatch\n", + crtc->base.id, crtc->name); return -EINVAL; } @@ -509,8 +542,8 @@ drm_atomic_helper_check_planes(struct drm_device *dev, ret = funcs->atomic_check(plane, plane_state); if (ret) { - DRM_DEBUG_ATOMIC("[PLANE:%d] atomic driver check failed\n", - plane->base.id); + DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic driver check failed\n", + plane->base.id, plane->name); return ret; } } @@ -525,8 +558,8 @@ drm_atomic_helper_check_planes(struct drm_device *dev, ret = funcs->atomic_check(crtc, state->crtc_states[i]); if (ret) { - DRM_DEBUG_ATOMIC("[CRTC:%d] atomic driver check failed\n", - crtc->base.id); + DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic driver check failed\n", + crtc->base.id, crtc->name); return ret; } } @@ -639,8 +672,8 @@ disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state) funcs = crtc->helper_private; - DRM_DEBUG_ATOMIC("disabling [CRTC:%d]\n", - crtc->base.id); + DRM_DEBUG_ATOMIC("disabling [CRTC:%d:%s]\n", + crtc->base.id, crtc->name); /* Right function depends upon target state. */ @@ -751,8 +784,8 @@ crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state) funcs = crtc->helper_private; if (crtc->state->enable && funcs->mode_set_nofb) { - DRM_DEBUG_ATOMIC("modeset on [CRTC:%d]\n", - crtc->base.id); + DRM_DEBUG_ATOMIC("modeset on [CRTC:%d:%s]\n", + crtc->base.id, crtc->name); funcs->mode_set_nofb(crtc); } @@ -851,8 +884,8 @@ void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev, funcs = crtc->helper_private; if (crtc->state->enable) { - DRM_DEBUG_ATOMIC("enabling [CRTC:%d]\n", - crtc->base.id); + DRM_DEBUG_ATOMIC("enabling [CRTC:%d:%s]\n", + crtc->base.id, crtc->name); if (funcs->enable) funcs->enable(crtc); @@ -913,9 +946,23 @@ static void wait_for_fences(struct drm_device *dev, } } -static bool framebuffer_changed(struct drm_device *dev, - struct drm_atomic_state *old_state, - struct drm_crtc *crtc) +/** + * drm_atomic_helper_framebuffer_changed - check if framebuffer has changed + * @dev: DRM device + * @old_state: atomic state object with old state structures + * @crtc: DRM crtc + * + * Checks whether the framebuffer used for this CRTC changes as a result of + * the atomic update. This is useful for drivers which cannot use + * drm_atomic_helper_wait_for_vblanks() and need to reimplement its + * functionality. + * + * Returns: + * true if the framebuffer changed. + */ +bool drm_atomic_helper_framebuffer_changed(struct drm_device *dev, + struct drm_atomic_state *old_state, + struct drm_crtc *crtc) { struct drm_plane *plane; struct drm_plane_state *old_plane_state; @@ -932,6 +979,7 @@ static bool framebuffer_changed(struct drm_device *dev, return false; } +EXPORT_SYMBOL(drm_atomic_helper_framebuffer_changed); /** * drm_atomic_helper_wait_for_vblanks - wait for vblank on crtcs @@ -966,7 +1014,8 @@ drm_atomic_helper_wait_for_vblanks(struct drm_device *dev, if (old_state->legacy_cursor_update) continue; - if (!framebuffer_changed(dev, old_state, crtc)) + if (!drm_atomic_helper_framebuffer_changed(dev, + old_state, crtc)) continue; ret = drm_crtc_vblank_get(crtc); @@ -1341,6 +1390,49 @@ drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state) } EXPORT_SYMBOL(drm_atomic_helper_commit_planes_on_crtc); +/** + * drm_atomic_helper_disable_planes_on_crtc - helper to disable CRTC's planes + * @crtc: CRTC + * @atomic: if set, synchronize with CRTC's atomic_begin/flush hooks + * + * Disables all planes associated with the given CRTC. This can be + * used for instance in the CRTC helper disable callback to disable + * all planes before shutting down the display pipeline. + * + * If the atomic-parameter is set the function calls the CRTC's + * atomic_begin hook before and atomic_flush hook after disabling the + * planes. + * + * It is a bug to call this function without having implemented the + * ->atomic_disable() plane hook. + */ +void drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc *crtc, + bool atomic) +{ + const struct drm_crtc_helper_funcs *crtc_funcs = + crtc->helper_private; + struct drm_plane *plane; + + if (atomic && crtc_funcs && crtc_funcs->atomic_begin) + crtc_funcs->atomic_begin(crtc, NULL); + + drm_for_each_plane(plane, crtc->dev) { + const struct drm_plane_helper_funcs *plane_funcs = + plane->helper_private; + + if (plane->state->crtc != crtc || !plane_funcs) + continue; + + WARN_ON(!plane_funcs->atomic_disable); + if (plane_funcs->atomic_disable) + plane_funcs->atomic_disable(plane, NULL); + } + + if (atomic && crtc_funcs && crtc_funcs->atomic_flush) + crtc_funcs->atomic_flush(crtc, NULL); +} +EXPORT_SYMBOL(drm_atomic_helper_disable_planes_on_crtc); + /** * drm_atomic_helper_cleanup_planes - cleanup plane resources after commit * @dev: DRM device @@ -1401,7 +1493,7 @@ void drm_atomic_helper_swap_state(struct drm_device *dev, { int i; - for (i = 0; i < dev->mode_config.num_connector; i++) { + for (i = 0; i < state->num_connector; i++) { struct drm_connector *connector = state->connectors[i]; if (!connector) @@ -1485,12 +1577,12 @@ retry: drm_atomic_set_fb_for_plane(plane_state, fb); plane_state->crtc_x = crtc_x; plane_state->crtc_y = crtc_y; - plane_state->crtc_h = crtc_h; plane_state->crtc_w = crtc_w; + plane_state->crtc_h = crtc_h; plane_state->src_x = src_x; plane_state->src_y = src_y; - plane_state->src_h = src_h; plane_state->src_w = src_w; + plane_state->src_h = src_h; if (plane == crtc->cursor) state->legacy_cursor_update = true; @@ -1609,12 +1701,12 @@ int __drm_atomic_helper_disable_plane(struct drm_plane *plane, drm_atomic_set_fb_for_plane(plane_state, NULL); plane_state->crtc_x = 0; plane_state->crtc_y = 0; - plane_state->crtc_h = 0; plane_state->crtc_w = 0; + plane_state->crtc_h = 0; plane_state->src_x = 0; plane_state->src_y = 0; - plane_state->src_h = 0; plane_state->src_w = 0; + plane_state->src_h = 0; return 0; } @@ -1676,7 +1768,7 @@ static int update_output_state(struct drm_atomic_state *state, if (crtc == set->crtc) continue; - if (!drm_atomic_connectors_for_crtc(state, crtc)) { + if (!crtc_state->connector_mask) { ret = drm_atomic_set_mode_prop_for_crtc(crtc_state, NULL); if (ret < 0) @@ -1797,16 +1889,16 @@ int __drm_atomic_helper_set_config(struct drm_mode_set *set, drm_atomic_set_fb_for_plane(primary_state, set->fb); primary_state->crtc_x = 0; primary_state->crtc_y = 0; - primary_state->crtc_h = vdisplay; primary_state->crtc_w = hdisplay; + primary_state->crtc_h = vdisplay; primary_state->src_x = set->x << 16; primary_state->src_y = set->y << 16; if (primary_state->rotation & (BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_270))) { - primary_state->src_h = hdisplay << 16; primary_state->src_w = vdisplay << 16; + primary_state->src_h = hdisplay << 16; } else { - primary_state->src_h = vdisplay << 16; primary_state->src_w = hdisplay << 16; + primary_state->src_h = vdisplay << 16; } commit: @@ -1817,6 +1909,161 @@ commit: return 0; } +/** + * drm_atomic_helper_disable_all - disable all currently active outputs + * @dev: DRM device + * @ctx: lock acquisition context + * + * Loops through all connectors, finding those that aren't turned off and then + * turns them off by setting their DPMS mode to OFF and deactivating the CRTC + * that they are connected to. + * + * This is used for example in suspend/resume to disable all currently active + * functions when suspending. + * + * Note that if callers haven't already acquired all modeset locks this might + * return -EDEADLK, which must be handled by calling drm_modeset_backoff(). + * + * Returns: + * 0 on success or a negative error code on failure. + * + * See also: + * drm_atomic_helper_suspend(), drm_atomic_helper_resume() + */ +int drm_atomic_helper_disable_all(struct drm_device *dev, + struct drm_modeset_acquire_ctx *ctx) +{ + struct drm_atomic_state *state; + struct drm_connector *conn; + int err; + + state = drm_atomic_state_alloc(dev); + if (!state) + return -ENOMEM; + + state->acquire_ctx = ctx; + + drm_for_each_connector(conn, dev) { + struct drm_crtc *crtc = conn->state->crtc; + struct drm_crtc_state *crtc_state; + + if (!crtc || conn->dpms != DRM_MODE_DPMS_ON) + continue; + + crtc_state = drm_atomic_get_crtc_state(state, crtc); + if (IS_ERR(crtc_state)) { + err = PTR_ERR(crtc_state); + goto free; + } + + crtc_state->active = false; + } + + err = drm_atomic_commit(state); + +free: + if (err < 0) + drm_atomic_state_free(state); + + return err; +} +EXPORT_SYMBOL(drm_atomic_helper_disable_all); + +/** + * drm_atomic_helper_suspend - subsystem-level suspend helper + * @dev: DRM device + * + * Duplicates the current atomic state, disables all active outputs and then + * returns a pointer to the original atomic state to the caller. Drivers can + * pass this pointer to the drm_atomic_helper_resume() helper upon resume to + * restore the output configuration that was active at the time the system + * entered suspend. + * + * Note that it is potentially unsafe to use this. The atomic state object + * returned by this function is assumed to be persistent. Drivers must ensure + * that this holds true. Before calling this function, drivers must make sure + * to suspend fbdev emulation so that nothing can be using the device. + * + * Returns: + * A pointer to a copy of the state before suspend on success or an ERR_PTR()- + * encoded error code on failure. Drivers should store the returned atomic + * state object and pass it to the drm_atomic_helper_resume() helper upon + * resume. + * + * See also: + * drm_atomic_helper_duplicate_state(), drm_atomic_helper_disable_all(), + * drm_atomic_helper_resume() + */ +struct drm_atomic_state *drm_atomic_helper_suspend(struct drm_device *dev) +{ + struct drm_modeset_acquire_ctx ctx; + struct drm_atomic_state *state; + int err; + + drm_modeset_acquire_init(&ctx, 0); + +retry: + err = drm_modeset_lock_all_ctx(dev, &ctx); + if (err < 0) { + state = ERR_PTR(err); + goto unlock; + } + + state = drm_atomic_helper_duplicate_state(dev, &ctx); + if (IS_ERR(state)) + goto unlock; + + err = drm_atomic_helper_disable_all(dev, &ctx); + if (err < 0) { + drm_atomic_state_free(state); + state = ERR_PTR(err); + goto unlock; + } + +unlock: + if (PTR_ERR(state) == -EDEADLK) { + drm_modeset_backoff(&ctx); + goto retry; + } + + drm_modeset_drop_locks(&ctx); + drm_modeset_acquire_fini(&ctx); + return state; +} +EXPORT_SYMBOL(drm_atomic_helper_suspend); + +/** + * drm_atomic_helper_resume - subsystem-level resume helper + * @dev: DRM device + * @state: atomic state to resume to + * + * Calls drm_mode_config_reset() to synchronize hardware and software states, + * grabs all modeset locks and commits the atomic state object. This can be + * used in conjunction with the drm_atomic_helper_suspend() helper to + * implement suspend/resume for drivers that support atomic mode-setting. + * + * Returns: + * 0 on success or a negative error code on failure. + * + * See also: + * drm_atomic_helper_suspend() + */ +int drm_atomic_helper_resume(struct drm_device *dev, + struct drm_atomic_state *state) +{ + struct drm_mode_config *config = &dev->mode_config; + int err; + + drm_mode_config_reset(dev); + drm_modeset_lock_all(dev); + state->acquire_ctx = config->acquire_ctx; + err = drm_atomic_commit(state); + drm_modeset_unlock_all(dev); + + return err; +} +EXPORT_SYMBOL(drm_atomic_helper_resume); + /** * drm_atomic_helper_crtc_set_property - helper for crtc properties * @crtc: DRM crtc @@ -2051,6 +2298,15 @@ retry: goto fail; drm_atomic_set_fb_for_plane(plane_state, fb); + /* Make sure we don't accidentally do a full modeset. */ + state->allow_modeset = false; + if (!crtc_state->active) { + DRM_DEBUG_ATOMIC("[CRTC:%d] disabled, rejecting legacy flip\n", + crtc->base.id); + ret = -EINVAL; + goto fail; + } + ret = drm_atomic_async_commit(state); if (ret != 0) goto fail; @@ -2173,6 +2429,12 @@ EXPORT_SYMBOL(drm_atomic_helper_connector_dpms); * The simpler solution is to just reset the software state to everything off, * which is easiest to do by calling drm_mode_config_reset(). To facilitate this * the atomic helpers provide default reset implementations for all hooks. + * + * On the upside the precise state tracking of atomic simplifies system suspend + * and resume a lot. For drivers using drm_mode_config_reset() a complete recipe + * is implemented in drm_atomic_helper_suspend() and drm_atomic_helper_resume(). + * For other drivers the building blocks are split out, see the documentation + * for these functions. */ /** @@ -2184,7 +2446,7 @@ EXPORT_SYMBOL(drm_atomic_helper_connector_dpms); */ void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc) { - if (crtc->state && crtc->state->mode_blob) + if (crtc->state) drm_property_unreference_blob(crtc->state->mode_blob); kfree(crtc->state); crtc->state = kzalloc(sizeof(*crtc->state), GFP_KERNEL); @@ -2252,8 +2514,7 @@ EXPORT_SYMBOL(drm_atomic_helper_crtc_duplicate_state); void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc, struct drm_crtc_state *state) { - if (state->mode_blob) - drm_property_unreference_blob(state->mode_blob); + drm_property_unreference_blob(state->mode_blob); } EXPORT_SYMBOL(__drm_atomic_helper_crtc_destroy_state); @@ -2367,6 +2628,28 @@ void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane, } EXPORT_SYMBOL(drm_atomic_helper_plane_destroy_state); +/** + * __drm_atomic_helper_connector_reset - reset state on connector + * @connector: drm connector + * @conn_state: connector state to assign + * + * Initializes the newly allocated @conn_state and assigns it to + * #connector ->state, usually required when initializing the drivers + * or when called from the ->reset hook. + * + * This is useful for drivers that subclass the connector state. + */ +void +__drm_atomic_helper_connector_reset(struct drm_connector *connector, + struct drm_connector_state *conn_state) +{ + if (conn_state) + conn_state->connector = connector; + + connector->state = conn_state; +} +EXPORT_SYMBOL(__drm_atomic_helper_connector_reset); + /** * drm_atomic_helper_connector_reset - default ->reset hook for connectors * @connector: drm connector @@ -2377,11 +2660,11 @@ EXPORT_SYMBOL(drm_atomic_helper_plane_destroy_state); */ void drm_atomic_helper_connector_reset(struct drm_connector *connector) { - kfree(connector->state); - connector->state = kzalloc(sizeof(*connector->state), GFP_KERNEL); + struct drm_connector_state *conn_state = + kzalloc(sizeof(*conn_state), GFP_KERNEL); - if (connector->state) - connector->state->connector = connector; + kfree(connector->state); + __drm_atomic_helper_connector_reset(connector, conn_state); } EXPORT_SYMBOL(drm_atomic_helper_connector_reset); @@ -2430,7 +2713,9 @@ EXPORT_SYMBOL(drm_atomic_helper_connector_duplicate_state); * @ctx: lock acquisition context * * Makes a copy of the current atomic state by looping over all objects and - * duplicating their respective states. + * duplicating their respective states. This is used for example by suspend/ + * resume support code to save the state prior to suspend such that it can + * be restored upon resume. * * Note that this treats atomic state as persistent between save and restore. * Drivers must make sure that this is possible and won't result in confusion @@ -2442,6 +2727,9 @@ EXPORT_SYMBOL(drm_atomic_helper_connector_duplicate_state); * Returns: * A pointer to the copy of the atomic state object on success or an * ERR_PTR()-encoded error code on failure. + * + * See also: + * drm_atomic_helper_suspend(), drm_atomic_helper_resume() */ struct drm_atomic_state * drm_atomic_helper_duplicate_state(struct drm_device *dev, -- cgit v1.2.3-54-g00ecf