/* * Copyright (c) 2006-2008 Intel Corporation * Copyright (c) 2007 Dave Airlie * * DRM core CRTC related functions * * 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. * * Authors: * Keith Packard * Eric Anholt * Dave Airlie * Jesse Barnes */ #include #include #include #include #include #include #include #include /** * 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) 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); 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) list_move_tail(&connector->head, &panel_list); } list_splice(&panel_list, &dev->mode_config.connector_list); } EXPORT_SYMBOL(drm_helper_move_panel_connectors_to_head); static bool drm_kms_helper_poll = true; module_param_named(poll, drm_kms_helper_poll, bool, 0600); static void drm_mode_validate_flag(struct drm_connector *connector, int flags) { struct drm_display_mode *mode; if (flags == (DRM_MODE_FLAG_DBLSCAN | DRM_MODE_FLAG_INTERLACE)) return; list_for_each_entry(mode, &connector->modes, head) { if ((mode->flags & DRM_MODE_FLAG_INTERLACE) && !(flags & DRM_MODE_FLAG_INTERLACE)) mode->status = MODE_NO_INTERLACE; if ((mode->flags & DRM_MODE_FLAG_DBLSCAN) && !(flags & DRM_MODE_FLAG_DBLSCAN)) mode->status = MODE_NO_DBLESCAN; } return; } /** * drm_helper_probe_single_connector_modes - get complete set of display modes * @connector: connector to probe * @maxX: max width for modes * @maxY: max height for modes * * LOCKING: * Caller must hold mode config lock. * * Based on the helper callbacks implemented by @connector try to detect all * valid modes. Modes will first be added to the connector's probed_modes list, * then culled (based on validity and the @maxX, @maxY parameters) and put into * the normal modes list. * * Intended to be use as a generic implementation of the ->probe() @connector * callback for drivers that use the crtc helpers for output mode filtering and * detection. * * RETURNS: * Number of modes found on @connector. */ int drm_helper_probe_single_connector_modes(struct drm_connector *connector, uint32_t maxX, uint32_t maxY) { struct drm_device *dev = connector->dev; struct drm_display_mode *mode; struct drm_connector_helper_funcs *connector_funcs = connector->helper_private; int count = 0; int mode_flags = 0; bool verbose_prune = true; enum drm_connector_status old_status; DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id, drm_get_connector_name(connector)); /* set all modes to the unverified state */ list_for_each_entry(mode, &connector->modes, head) mode->status = MODE_UNVERIFIED; if (connector->force) { if (connector->force == DRM_FORCE_ON) connector->status = connector_status_connected; else connector->status = connector_status_disconnected; if (connector->funcs->force) connector->funcs->force(connector); } else { old_status = connector->status; connector->status = connector->funcs->detect(connector, true); /* * Normally either the driver's hpd code or the poll loop should * pick up any changes and fire the hotplug event. But if * userspace sneaks in a probe, we might miss a change. Hence * check here, and if anything changed start the hotplug code. */ if (old_status != connector->status) { DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n", connector->base.id, drm_get_connector_name(connector), old_status, connector->status); /* * The hotplug event code might call into the fb * helpers, and so expects that we do not hold any * locks. Fire up the poll struct instead, it will * disable itself again. */ dev->mode_config.delayed_event = true; schedule_delayed_work(&dev->mode_config.output_poll_work, 0); } } /* Re-enable polling in case the global poll config changed. */ if (drm_kms_helper_poll != dev->mode_config.poll_running) drm_kms_helper_poll_enable(dev); dev->mode_config.poll_running = drm_kms_helper_poll; if (connector->status == connector_status_disconnected) { DRM_DEBUG_KMS("[CONNECTOR:%d:%s] disconnected\n", connector->base.id, drm_get_connector_name(connector)); drm_mode_connector_update_edid_property(connector, NULL); verbose_prune = false; goto prune; } #ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE count = drm_load_edid_firmware(connector); if (count == 0) #endif count = (*connector_funcs->get_modes)(connector); if (count == 0 && connector->status == connector_status_connected) count = drm_add_modes_noedid(connector, 1024, 768); if (count == 0) goto prune; drm_mode_connector_list_update(connector); if (maxX && maxY) drm_mode_validate_size(dev, &connector->modes, maxX, maxY, 0); if (connector->interlace_allowed) mode_flags |= DRM_MODE_FLAG_INTERLACE; if (connector->doublescan_allowed) mode_flags |= DRM_MODE_FLAG_DBLSCAN; drm_mode_validate_flag(connector, mode_flags); list_for_each_entry(mode, &connector->modes, head) { if (mode->status == MODE_OK) mode->status = connector_funcs->mode_valid(connector, mode); } prune: drm_mode_prune_invalid(dev, &connector->modes, verbose_prune); if (list_empty(&connector->modes)) return 0; list_for_each_entry(mode, &connector->modes, head) mode->vrefresh = drm_mode_vrefresh(mode); drm_mode_sort(&connector->modes); DRM_DEBUG_KMS("[CONNECTOR:%d:%s] probed modes :\n", connector->base.id, drm_get_connector_name(connector)); list_for_each_entry(mode, &connector->modes, head) { drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); drm_mode_debug_printmodeline(mode); } return count; } EXPORT_SYMBOL(drm_helper_probe_single_connector_modes); /** * drm_helper_encoder_in_use - check if a given encoder is in use * @encoder: encoder to check * * LOCKING: * Caller must hold mode config lock. * * Walk @encoders's DRM device's mode_config and see if it's in use. * * RETURNS: * True if @encoder is part of the mode_config, false otherwise. */ bool drm_helper_encoder_in_use(struct drm_encoder *encoder) { struct drm_connector *connector; struct drm_device *dev = encoder->dev; list_for_each_entry(connector, &dev->mode_config.connector_list, head) if (connector->encoder == encoder) return true; return false; } EXPORT_SYMBOL(drm_helper_encoder_in_use); /** * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config * @crtc: CRTC to check * * LOCKING: * Caller must hold mode config lock. * * Walk @crtc's DRM device's mode_config and see if it's in use. * * RETURNS: * True if @crtc is part of the mode_config, false otherwise. */ bool drm_helper_crtc_in_use(struct drm_crtc *crtc) { struct drm_encoder *encoder; struct drm_device *dev = crtc->dev; /* FIXME: Locking around list access? */ list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder)) return true; return false; } EXPORT_SYMBOL(drm_helper_crtc_in_use); static void drm_encoder_disable(struct drm_encoder *encoder) { struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; if (encoder_funcs->disable) (*encoder_funcs->disable)(encoder); else (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF); } /** * drm_helper_disable_unused_functions - disable unused objects * @dev: DRM device * * LOCKING: * Caller must hold mode config lock. * * If an connector or CRTC isn't part of @dev's mode_config, it can be disabled * by calling its dpms function, which should power it off. */ void drm_helper_disable_unused_functions(struct drm_device *dev) { struct drm_encoder *encoder; struct drm_connector *connector; struct drm_crtc *crtc; list_for_each_entry(connector, &dev->mode_config.connector_list, head) { if (!connector->encoder) continue; if (connector->status == connector_status_disconnected) connector->encoder = NULL; } list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { if (!drm_helper_encoder_in_use(encoder)) { drm_encoder_disable(encoder); /* disconnector encoder from any connector */ encoder->crtc = NULL; } } list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; crtc->enabled = drm_helper_crtc_in_use(crtc); if (!crtc->enabled) { if (crtc_funcs->disable) (*crtc_funcs->disable)(crtc); else (*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF); crtc->fb = NULL; } } } EXPORT_SYMBOL(drm_helper_disable_unused_functions); /** * drm_encoder_crtc_ok - can a given crtc drive a given encoder? * @encoder: encoder to test * @crtc: crtc to test * * Return false if @encoder can't be driven by @crtc, true otherwise. */ static bool drm_encoder_crtc_ok(struct drm_encoder *encoder, struct drm_crtc *crtc) { struct drm_device *dev; struct drm_crtc *tmp; int crtc_mask = 1; WARN(!crtc, "checking null crtc?\n"); dev = crtc->dev; list_for_each_entry(tmp, &dev->mode_config.crtc_list, head) { if (tmp == crtc) break; crtc_mask <<= 1; } if (encoder->possible_crtcs & crtc_mask) return true; return false; } /* * Check the CRTC we're going to map each output to vs. its current * CRTC. If they don't match, we have to disable the output and the CRTC * since the driver will have to re-route things. */ static void drm_crtc_prepare_encoders(struct drm_device *dev) { struct drm_encoder_helper_funcs *encoder_funcs; struct drm_encoder *encoder; list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { encoder_funcs = encoder->helper_private; /* Disable unused encoders */ if (encoder->crtc == NULL) drm_encoder_disable(encoder); /* Disable encoders whose CRTC is about to change */ if (encoder_funcs->get_crtc && encoder->crtc != (*encoder_funcs->get_crtc)(encoder)) drm_encoder_disable(encoder); } } /** * drm_crtc_helper_set_mode - internal helper to set a mode * @crtc: CRTC to program * @mode: mode to use * @x: horizontal offset into the surface * @y: vertical offset into the surface * @old_fb: old framebuffer, for cleanup * * LOCKING: * Caller must hold mode config lock. * * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance * to fixup or reject the mode prior to trying to set it. This is an internal * helper that drivers could e.g. use to update properties that require the * entire output pipe to be disabled and re-enabled in a new configuration. For * example for changing whether audio is enabled on a hdmi link or for changing * panel fitter or dither attributes. It is also called by the * drm_crtc_helper_set_config() helper function to drive the mode setting * sequence. * * RETURNS: * True if the mode was set successfully, or false otherwise. */ bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, struct drm_display_mode *mode, int x, int y, struct drm_framebuffer *old_fb) { struct drm_device *dev = crtc->dev; struct drm_display_mode *adjusted_mode, saved_mode, saved_hwmode; struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; struct drm_encoder_helper_funcs *encoder_funcs; int saved_x, saved_y; struct drm_encoder *encoder; bool ret = true; crtc->enabled = drm_helper_crtc_in_use(crtc); if (!crtc->enabled) return true; adjusted_mode = drm_mode_duplicate(dev, mode); if (!adjusted_mode) return false; saved_hwmode = crtc->hwmode; saved_mode = crtc->mode; saved_x = crtc->x; saved_y = crtc->y; /* Update crtc values up front so the driver can rely on them for mode * setting. */ crtc->mode = *mode; crtc->x = x; crtc->y = y; /* Pass our mode to the connectors and the CRTC to give them a chance to * adjust it according to limitations or connector properties, and also * a chance to reject the mode entirely. */ list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { if (encoder->crtc != crtc) continue; encoder_funcs = encoder->helper_private; if (!(ret = encoder_funcs->mode_fixup(encoder, mode, adjusted_mode))) { DRM_DEBUG_KMS("Encoder fixup failed\n"); goto done; } } if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) { DRM_DEBUG_KMS("CRTC fixup failed\n"); goto done; } DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); /* Prepare the encoders and CRTCs before setting the mode. */ list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { if (encoder->crtc != crtc) continue; encoder_funcs = encoder->helper_private; /* Disable the encoders as the first thing we do. */ encoder_funcs->prepare(encoder); } drm_crtc_prepare_encoders(dev); crtc_funcs->prepare(crtc); /* Set up the DPLL and any encoders state that needs to adjust or depend * on the DPLL. */ ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb); if (!ret) goto done; list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { if (encoder->crtc != crtc) continue; DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n", encoder->base.id, drm_get_encoder_name(encoder), mode->base.id, mode->name); encoder_funcs = encoder->helper_private; encoder_funcs->mode_set(encoder, mode, adjusted_mode); } /* Now enable the clocks, plane, pipe, and connectors that we set up. */ crtc_funcs->commit(crtc); list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { if (encoder->crtc != crtc) continue; encoder_funcs = encoder->helper_private; encoder_funcs->commit(encoder); } /* Store real post-adjustment hardware mode. */ crtc->hwmode = *adjusted_mode; /* Calculate and store various constants which * are later needed by vblank and swap-completion * timestamping. They are derived from true hwmode. */ drm_calc_timestamping_constants(crtc); /* FIXME: add subpixel order */ done: drm_mode_destroy(dev, adjusted_mode); if (!ret) { crtc->hwmode = saved_hwmode; crtc->mode = saved_mode; crtc->x = saved_x; crtc->y = saved_y; } return ret; } EXPORT_SYMBOL(drm_crtc_helper_set_mode); static int drm_crtc_helper_disable(struct drm_crtc *crtc) { struct drm_device *dev = crtc->dev; struct drm_connector *connector; struct drm_encoder *encoder; /* Decouple all encoders and their attached connectors from this crtc */ list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { if (encoder->crtc != crtc) continue; list_for_each_entry(connector, &dev->mode_config.connector_list, head) { if (connector->encoder != encoder) continue; connector->encoder = NULL; } } drm_helper_disable_unused_functions(dev); return 0; } /** * drm_crtc_helper_set_config - set a new config from userspace * @set: mode set configuration * * LOCKING: * Caller must hold mode config lock. * * Setup a new configuration, provided by the upper layers (either an ioctl call * from userspace or internally e.g. from the fbdev suppport code) in @set, and * enable it. This is the main helper functions for drivers that implement * kernel mode setting with the crtc helper functions and the assorted * ->prepare(), ->modeset() and ->commit() helper callbacks. * * RETURNS: * Returns 0 on success, -ERRNO on failure. */ int drm_crtc_helper_set_config(struct drm_mode_set *set) { struct drm_device *dev; struct drm_crtc *save_crtcs, *new_crtc, *crtc; struct drm_encoder *save_encoders, *new_encoder, *encoder; struct drm_framebuffer *old_fb = NULL; bool mode_changed = false; /* if true do a full mode set */ bool fb_changed = false; /* if true and !mode_changed just do a flip */ struct drm_connector *save_connectors, *connector; int count = 0, ro, fail = 0; struct drm_crtc_helper_funcs *crtc_funcs; struct drm_mode_set save_set; int ret; int i; DRM_DEBUG_KMS("\n"); BUG_ON(!set); BUG_ON(!set->crtc); BUG_ON(!set->crtc->helper_private); /* Enforce sane interface api - has been abused by the fb helper. */ BUG_ON(!set->mode && set->fb); BUG_ON(set->fb && set->num_connectors == 0); crtc_funcs = set->crtc->helper_private; if (!set->mode) set->fb = NULL; if (set->fb) { DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n", set->crtc->base.id, set->fb->base.id, (int)set->num_connectors, set->x, set->y); } else { DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set->crtc->base.id); return drm_crtc_helper_disable(set->crtc); } dev = set->crtc->dev; /* Allocate space for the backup of all (non-pointer) crtc, encoder and * connector data. */ save_crtcs = kzalloc(dev->mode_config.num_crtc * sizeof(struct drm_crtc), GFP_KERNEL); if (!save_crtcs) return -ENOMEM; save_encoders = kzalloc(dev->mode_config.num_encoder * sizeof(struct drm_encoder), GFP_KERNEL); if (!save_encoders) { kfree(save_crtcs); return -ENOMEM; } save_connectors = kzalloc(dev->mode_config.num_connector * sizeof(struct drm_connector), GFP_KERNEL); if (!save_connectors) { kfree(save_crtcs); kfree(save_encoders); return -ENOMEM; } /* Copy data. Note that driver private data is not affected. * Should anything bad happen only the expected state is * restored, not the drivers personal bookkeeping. */ count = 0; list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { save_crtcs[count++] = *crtc; } count = 0; list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { save_encoders[count++] = *encoder; } count = 0; list_for_each_entry(connector, &dev->mode_config.connector_list, head) { save_connectors[count++] = *connector; } save_set.crtc = set->crtc; save_set.mode = &set->crtc->mode; save_set.x = set->crtc->x; save_set.y = set->crtc->y; save_set.fb = set->crtc->fb; /* We should be able to check here if the fb has the same properties * and then just flip_or_move it */ if (set->crtc->fb != set->fb) { /* If we have no fb then treat it as a full mode set */ if (set->crtc->fb == NULL) { DRM_DEBUG_KMS("crtc has no fb, full mode set\n"); mode_changed = true; } else if (set->fb == NULL) { mode_changed = true; } else if (set->fb->pixel_format != set->crtc->fb->pixel_format) { mode_changed = true; } else fb_changed = true; } if (set->x != set->crtc->x || set->y != set->crtc->y) fb_changed = true; if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) { DRM_DEBUG_KMS("modes are different, full mode set\n"); drm_mode_debug_printmodeline(&set->crtc->mode); drm_mode_debug_printmodeline(set->mode); mode_changed = true; } /* a) traverse passed in connector list and get encoders for them */ count = 0; list_for_each_entry(connector, &dev->mode_config.connector_list, head) { struct drm_connector_helper_funcs *connector_funcs = connector->helper_private; new_encoder = connector->encoder; for (ro = 0; ro < set->num_connectors; ro++) { if (set->connectors[ro] == connector) { new_encoder = connector_funcs->best_encoder(connector); /* if we can't get an encoder for a connector we are setting now - then fail */ if (new_encoder == NULL) /* don't break so fail path works correct */ fail = 1; break; } } if (new_encoder != connector->encoder) { DRM_DEBUG_KMS("encoder changed, full mode switch\n"); mode_changed = true; /* If the encoder is reused for another connector, then * the appropriate crtc will be set later. */ if (connector->encoder) connector->encoder->crtc = NULL; connector->encoder = new_encoder; } } if (fail) { ret = -EINVAL; goto fail; } count = 0; list_for_each_entry(connector, &dev->mode_config.connector_list, head) { if (!connector->encoder) continue; if (connector->encoder->crtc == set->crtc) new_crtc = NULL; else new_crtc = connector->encoder->crtc; for (ro = 0; ro < set->num_connectors; ro++) { if (set->connectors[ro] == connector) new_crtc = set->crtc; } /* Make sure the new CRTC will work with the encoder */ if (new_crtc && !drm_encoder_crtc_ok(connector->encoder, new_crtc)) { ret = -EINVAL; goto fail; } if (new_crtc != connector->encoder->crtc) { DRM_DEBUG_KMS("crtc changed, full mode switch\n"); mode_changed = true; connector->encoder->crtc = new_crtc; } if (new_crtc) { DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n", connector->base.id, drm_get_connector_name(connector), new_crtc->base.id); } else { DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n", connector->base.id, drm_get_connector_name(connector)); } } /* mode_set_base is not a required function */ if (fb_changed && !crtc_funcs->mode_set_base) mode_changed = true; if (mode_changed) { set->crtc->enabled = drm_helper_crtc_in_use(set->crtc); if (set->crtc->enabled) { DRM_DEBUG_KMS("attempting to set mode from" " userspace\n"); drm_mode_debug_printmodeline(set->mode); old_fb = set->crtc->fb; set->crtc->fb = set->fb; if (!drm_crtc_helper_set_mode(set->crtc, set->mode, set->x, set->y, old_fb)) { DRM_ERROR("failed to set mode on [CRTC:%d]\n", set->crtc->base.id); set->crtc->fb = old_fb; ret = -EINVAL; goto fail; } } drm_helper_disable_unused_functions(dev); } else if (fb_changed) { set->crtc->x = set->x; set->crtc->y = set->y; old_fb = set->crtc->fb; if (set->crtc->fb != set->fb) set->crtc->fb = set->fb; ret = crtc_funcs->mode_set_base(set->crtc, set->x, set->y, old_fb); if (ret != 0) { set->crtc->fb = old_fb; goto fail; } } /* * crtc set_config helpers implicit set the crtc and all connected * encoders to DPMS on for a full mode set. But for just an fb update it * doesn't do that. To not confuse userspace, do an explicit DPMS_ON * unconditionally. This will also ensure driver internal dpms state is * consistent again. */ if (set->crtc->enabled) { DRM_DEBUG_KMS("Setting connector DPMS state to on\n"); for (i = 0; i < set->num_connectors; i++) { DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id, drm_get_connector_name(set->connectors[i])); set->connectors[i]->funcs->dpms(set->connectors[i], DRM_MODE_DPMS_ON); } } kfree(save_connectors); kfree(save_encoders); kfree(save_crtcs); return 0; fail: /* Restore all previous data. */ count = 0; list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { *crtc = save_crtcs[count++]; } count = 0; list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { *encoder = save_encoders[count++]; } count = 0; list_for_each_entry(connector, &dev->mode_config.connector_list, head) { *connector = save_connectors[count++]; } /* Try to restore the config */ if (mode_changed && !drm_crtc_helper_set_mode(save_set.crtc, save_set.mode, save_set.x, save_set.y, save_set.fb)) DRM_ERROR("failed to restore config after modeset failure\n"); kfree(save_connectors); kfree(save_encoders); kfree(save_crtcs); return ret; } EXPORT_SYMBOL(drm_crtc_helper_set_config); static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder) { int dpms = DRM_MODE_DPMS_OFF; struct drm_connector *connector; struct drm_device *dev = encoder->dev; list_for_each_entry(connector, &dev->mode_config.connector_list, head) if (connector->encoder == encoder) if (connector->dpms < dpms) dpms = connector->dpms; return dpms; } static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc) { int dpms = DRM_MODE_DPMS_OFF; struct drm_connector *connector; struct drm_device *dev = crtc->dev; list_for_each_entry(connector, &dev->mode_config.connector_list, head) if (connector->encoder && connector->encoder->crtc == crtc) if (connector->dpms < dpms) dpms = connector->dpms; return dpms; } /** * drm_helper_connector_dpms() - connector dpms helper implementation * @connector: affected connector * @mode: DPMS mode * * This is the main helper function provided by the crtc helper framework for * implementing the DPMS connector attribute. It computes the new desired DPMS * state for all encoders and crtcs in the output mesh and calls the ->dpms() * callback provided by the driver appropriately. */ void drm_helper_connector_dpms(struct drm_connector *connector, int mode) { struct drm_encoder *encoder = connector->encoder; struct drm_crtc *crtc = encoder ? encoder->crtc : NULL; int old_dpms; if (mode == connector->dpms) return; old_dpms = connector->dpms; connector->dpms = mode; /* from off to on, do crtc then encoder */ if (mode < old_dpms) { if (crtc) { struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; if (crtc_funcs->dpms) (*crtc_funcs->dpms) (crtc, drm_helper_choose_crtc_dpms(crtc)); } if (encoder) { struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; if (encoder_funcs->dpms) (*encoder_funcs->dpms) (encoder, drm_helper_choose_encoder_dpms(encoder)); } } /* from on to off, do encoder then crtc */ if (mode > old_dpms) { if (encoder) { struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; if (encoder_funcs->dpms) (*encoder_funcs->dpms) (encoder, drm_helper_choose_encoder_dpms(encoder)); } if (crtc) { struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; if (crtc_funcs->dpms) (*crtc_funcs->dpms) (crtc, drm_helper_choose_crtc_dpms(crtc)); } } return; } EXPORT_SYMBOL(drm_helper_connector_dpms); int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb, struct drm_mode_fb_cmd2 *mode_cmd) { int i; 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]; } drm_fb_get_bpp_depth(mode_cmd->pixel_format, &fb->depth, &fb->bits_per_pixel); fb->pixel_format = mode_cmd->pixel_format; return 0; } EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct); int drm_helper_resume_force_mode(struct drm_device *dev) { struct drm_crtc *crtc; struct drm_encoder *encoder; struct drm_encoder_helper_funcs *encoder_funcs; struct drm_crtc_helper_funcs *crtc_funcs; int ret; list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { if (!crtc->enabled) continue; ret = drm_crtc_helper_set_mode(crtc, &crtc->mode, crtc->x, crtc->y, crtc->fb); if (ret == false) DRM_ERROR("failed to set mode on crtc %p\n", crtc); /* Turn off outputs that were already powered off */ if (drm_helper_choose_crtc_dpms(crtc)) { list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { if(encoder->crtc != crtc) continue; encoder_funcs = encoder->helper_private; if (encoder_funcs->dpms) (*encoder_funcs->dpms) (encoder, drm_helper_choose_encoder_dpms(encoder)); } crtc_funcs = crtc->helper_private; if (crtc_funcs->dpms) (*crtc_funcs->dpms) (crtc, drm_helper_choose_crtc_dpms(crtc)); } } /* disable the unused connectors while restoring the modesetting */ drm_helper_disable_unused_functions(dev); return 0; } EXPORT_SYMBOL(drm_helper_resume_force_mode); void drm_kms_helper_hotplug_event(struct drm_device *dev) { /* send a uevent + call fbdev */ drm_sysfs_hotplug_event(dev); if (dev->mode_config.funcs->output_poll_changed) dev->mode_config.funcs->output_poll_changed(dev); } EXPORT_SYMBOL(drm_kms_helper_hotplug_event); #define DRM_OUTPUT_POLL_PERIOD (10*HZ) static void output_poll_execute(struct work_struct *work) { struct delayed_work *delayed_work = to_delayed_work(work); struct drm_device *dev = container_of(delayed_work, struct drm_device, mode_config.output_poll_work); struct drm_connector *connector; enum drm_connector_status old_status; bool repoll = false, changed; /* Pick up any changes detected by the probe functions. */ changed = dev->mode_config.delayed_event; dev->mode_config.delayed_event = false; if (!drm_kms_helper_poll) return; mutex_lock(&dev->mode_config.mutex); list_for_each_entry(connector, &dev->mode_config.connector_list, head) { /* Ignore forced connectors. */ if (connector->force) continue; /* Ignore HPD capable connectors and connectors where we don't * want any hotplug detection at all for polling. */ if (!connector->polled || connector->polled == DRM_CONNECTOR_POLL_HPD) continue; repoll = true; old_status = connector->status; /* if we are connected and don't want to poll for disconnect skip it */ if (old_status == connector_status_connected && !(connector->polled & DRM_CONNECTOR_POLL_DISCONNECT)) continue; connector->status = connector->funcs->detect(connector, false); if (old_status != connector->status) { const char *old, *new; old = drm_get_connector_status_name(old_status); new = drm_get_connector_status_name(connector->status); DRM_DEBUG_KMS("[CONNECTOR:%d:%s] " "status updated from %s to %s\n", connector->base.id, drm_get_connector_name(connector), old, new); changed = true; } } mutex_unlock(&dev->mode_config.mutex); if (changed) drm_kms_helper_hotplug_event(dev); if (repoll) schedule_delayed_work(delayed_work, DRM_OUTPUT_POLL_PERIOD); } void drm_kms_helper_poll_disable(struct drm_device *dev) { if (!dev->mode_config.poll_enabled) return; cancel_delayed_work_sync(&dev->mode_config.output_poll_work); } EXPORT_SYMBOL(drm_kms_helper_poll_disable); void drm_kms_helper_poll_enable(struct drm_device *dev) { bool poll = false; struct drm_connector *connector; if (!dev->mode_config.poll_enabled || !drm_kms_helper_poll) return; list_for_each_entry(connector, &dev->mode_config.connector_list, head) { if (connector->polled & (DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT)) poll = true; } if (poll) schedule_delayed_work(&dev->mode_config.output_poll_work, DRM_OUTPUT_POLL_PERIOD); } EXPORT_SYMBOL(drm_kms_helper_poll_enable); void drm_kms_helper_poll_init(struct drm_device *dev) { INIT_DELAYED_WORK(&dev->mode_config.output_poll_work, output_poll_execute); dev->mode_config.poll_enabled = true; drm_kms_helper_poll_enable(dev); } EXPORT_SYMBOL(drm_kms_helper_poll_init); void drm_kms_helper_poll_fini(struct drm_device *dev) { drm_kms_helper_poll_disable(dev); } EXPORT_SYMBOL(drm_kms_helper_poll_fini); void drm_helper_hpd_irq_event(struct drm_device *dev) { struct drm_connector *connector; enum drm_connector_status old_status; bool changed = false; if (!dev->mode_config.poll_enabled) return; mutex_lock(&dev->mode_config.mutex); list_for_each_entry(connector, &dev->mode_config.connector_list, head) { /* Only handle HPD capable connectors. */ if (!(connector->polled & DRM_CONNECTOR_POLL_HPD)) continue; old_status = connector->status; connector->status = connector->funcs->detect(connector, false); DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %s to %s\n", connector->base.id, drm_get_connector_name(connector), drm_get_connector_status_name(old_status), drm_get_connector_status_name(connector->status)); if (old_status != connector->status) changed = true; } mutex_unlock(&dev->mode_config.mutex); if (changed) drm_kms_helper_hotplug_event(dev); } EXPORT_SYMBOL(drm_helper_hpd_irq_event);