/* * Copyright (c) 2016 Intel Corporation * * Permission to use, copy, modify, distribute, and sell this software and its * documentation for any purpose is hereby granted without fee, provided that * the above copyright notice appear in all copies and that both that copyright * notice and this permission notice appear in supporting documentation, and * that the name of the copyright holders not be used in advertising or * publicity pertaining to distribution of the software without specific, * written prior permission. The copyright holders make no representations * about the suitability of this software for any purpose. It is provided "as * is" without express or implied warranty. * * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE * OF THIS SOFTWARE. */ #include <drm/drm_atomic_helper.h> #include <drm/drm_crtc_helper.h> #include <drm/drm_fb_helper.h> #include <drm/drm_modeset_helper.h> #include <drm/drm_plane_helper.h> /** * DOC: aux kms helpers * * This helper library contains various one-off functions which don't really fit * anywhere else in the DRM modeset helper library. */ /** * drm_helper_move_panel_connectors_to_head() - move panels to the front in the * connector list * @dev: drm device to operate on * * Some userspace presumes that the first connected connector is the main * display, where it's supposed to display e.g. the login screen. For * laptops, this should be the main panel. Use this function to sort all * (eDP/LVDS/DSI) panels to the front of the connector list, instead of * painstakingly trying to initialize them in the right order. */ void drm_helper_move_panel_connectors_to_head(struct drm_device *dev) { struct drm_connector *connector, *tmp; struct list_head panel_list; INIT_LIST_HEAD(&panel_list); spin_lock_irq(&dev->mode_config.connector_list_lock); list_for_each_entry_safe(connector, tmp, &dev->mode_config.connector_list, head) { if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS || connector->connector_type == DRM_MODE_CONNECTOR_eDP || connector->connector_type == DRM_MODE_CONNECTOR_DSI) list_move_tail(&connector->head, &panel_list); } list_splice(&panel_list, &dev->mode_config.connector_list); spin_unlock_irq(&dev->mode_config.connector_list_lock); } EXPORT_SYMBOL(drm_helper_move_panel_connectors_to_head); /** * drm_helper_mode_fill_fb_struct - fill out framebuffer metadata * @dev: DRM device * @fb: drm_framebuffer object to fill out * @mode_cmd: metadata from the userspace fb creation request * * This helper can be used in a drivers fb_create callback to pre-fill the fb's * metadata fields. */ void drm_helper_mode_fill_fb_struct(struct drm_device *dev, struct drm_framebuffer *fb, const struct drm_mode_fb_cmd2 *mode_cmd) { int i; fb->dev = dev; fb->format = drm_get_format_info(dev, mode_cmd); fb->width = mode_cmd->width; fb->height = mode_cmd->height; for (i = 0; i < 4; i++) { fb->pitches[i] = mode_cmd->pitches[i]; fb->offsets[i] = mode_cmd->offsets[i]; } fb->modifier = mode_cmd->modifier[0]; fb->flags = mode_cmd->flags; } EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct); /* * This is the minimal list of formats that seem to be safe for modeset use * with all current DRM drivers. Most hardware can actually support more * formats than this and drivers may specify a more accurate list when * creating the primary plane. However drivers that still call * drm_plane_init() will use this minimal format list as the default. */ static const uint32_t safe_modeset_formats[] = { DRM_FORMAT_XRGB8888, DRM_FORMAT_ARGB8888, }; static struct drm_plane *create_primary_plane(struct drm_device *dev) { struct drm_plane *primary; int ret; primary = kzalloc(sizeof(*primary), GFP_KERNEL); if (primary == NULL) { DRM_DEBUG_KMS("Failed to allocate primary plane\n"); return NULL; } /* * Remove the format_default field from drm_plane when dropping * this helper. */ primary->format_default = true; /* possible_crtc's will be filled in later by crtc_init */ ret = drm_universal_plane_init(dev, primary, 0, &drm_primary_helper_funcs, safe_modeset_formats, ARRAY_SIZE(safe_modeset_formats), NULL, DRM_PLANE_TYPE_PRIMARY, NULL); if (ret) { kfree(primary); primary = NULL; } return primary; } /** * drm_crtc_init - Legacy CRTC initialization function * @dev: DRM device * @crtc: CRTC object to init * @funcs: callbacks for the new CRTC * * Initialize a CRTC object with a default helper-provided primary plane and no * cursor plane. * * Returns: * Zero on success, error code on failure. */ int drm_crtc_init(struct drm_device *dev, struct drm_crtc *crtc, const struct drm_crtc_funcs *funcs) { struct drm_plane *primary; primary = create_primary_plane(dev); return drm_crtc_init_with_planes(dev, crtc, primary, NULL, funcs, NULL); } EXPORT_SYMBOL(drm_crtc_init); /** * drm_mode_config_helper_suspend - Modeset suspend helper * @dev: DRM device * * This helper function takes care of suspending the modeset side. It disables * output polling if initialized, suspends fbdev if used and finally calls * drm_atomic_helper_suspend(). * If suspending fails, fbdev and polling is re-enabled. * * Returns: * Zero on success, negative error code on error. * * See also: * drm_kms_helper_poll_disable() and drm_fb_helper_set_suspend_unlocked(). */ int drm_mode_config_helper_suspend(struct drm_device *dev) { struct drm_atomic_state *state; if (!dev) return 0; drm_kms_helper_poll_disable(dev); drm_fb_helper_set_suspend_unlocked(dev->fb_helper, 1); state = drm_atomic_helper_suspend(dev); if (IS_ERR(state)) { drm_fb_helper_set_suspend_unlocked(dev->fb_helper, 0); drm_kms_helper_poll_enable(dev); return PTR_ERR(state); } dev->mode_config.suspend_state = state; return 0; } EXPORT_SYMBOL(drm_mode_config_helper_suspend); /** * drm_mode_config_helper_resume - Modeset resume helper * @dev: DRM device * * This helper function takes care of resuming the modeset side. It calls * drm_atomic_helper_resume(), resumes fbdev if used and enables output polling * if initiaized. * * Returns: * Zero on success, negative error code on error. * * See also: * drm_fb_helper_set_suspend_unlocked() and drm_kms_helper_poll_enable(). */ int drm_mode_config_helper_resume(struct drm_device *dev) { int ret; if (!dev) return 0; if (WARN_ON(!dev->mode_config.suspend_state)) return -EINVAL; ret = drm_atomic_helper_resume(dev, dev->mode_config.suspend_state); if (ret) DRM_ERROR("Failed to resume (%d)\n", ret); dev->mode_config.suspend_state = NULL; drm_fb_helper_set_suspend_unlocked(dev->fb_helper, 0); drm_kms_helper_poll_enable(dev); return ret; } EXPORT_SYMBOL(drm_mode_config_helper_resume);
