/* * drivers/gpu/drm/omapdrm/omap_drv.c * * Copyright (C) 2011 Texas Instruments * Author: Rob Clark * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 as published by * the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should have received a copy of the GNU General Public License along with * this program. If not, see . */ #include #include #include #include #include #include "omap_dmm_tiler.h" #include "omap_drv.h" #define DRIVER_NAME MODULE_NAME #define DRIVER_DESC "OMAP DRM" #define DRIVER_DATE "20110917" #define DRIVER_MAJOR 1 #define DRIVER_MINOR 0 #define DRIVER_PATCHLEVEL 0 static int num_crtc = CONFIG_DRM_OMAP_NUM_CRTCS; MODULE_PARM_DESC(num_crtc, "Number of overlays to use as CRTCs"); module_param(num_crtc, int, 0600); /* * mode config funcs */ /* Notes about mapping DSS and DRM entities: * CRTC: overlay * encoder: manager.. with some extension to allow one primary CRTC * and zero or more video CRTC's to be mapped to one encoder? * connector: dssdev.. manager can be attached/detached from different * devices */ static void omap_fb_output_poll_changed(struct drm_device *dev) { struct omap_drm_private *priv = dev->dev_private; DBG("dev=%p", dev); if (priv->fbdev) drm_fb_helper_hotplug_event(priv->fbdev); } struct omap_atomic_state_commit { struct work_struct work; struct drm_device *dev; struct drm_atomic_state *state; u32 crtcs; }; static void omap_atomic_wait_for_completion(struct drm_device *dev, struct drm_atomic_state *old_state) { struct drm_crtc_state *old_crtc_state; struct drm_crtc *crtc; unsigned int i; int ret; for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { if (!crtc->state->enable) continue; ret = omap_crtc_wait_pending(crtc); if (!ret) dev_warn(dev->dev, "atomic complete timeout (pipe %u)!\n", i); } } static void omap_atomic_complete(struct omap_atomic_state_commit *commit) { struct drm_device *dev = commit->dev; struct omap_drm_private *priv = dev->dev_private; struct drm_atomic_state *old_state = commit->state; /* Apply the atomic update. */ dispc_runtime_get(); drm_atomic_helper_commit_modeset_disables(dev, old_state); drm_atomic_helper_commit_planes(dev, old_state, false); drm_atomic_helper_commit_modeset_enables(dev, old_state); omap_atomic_wait_for_completion(dev, old_state); drm_atomic_helper_cleanup_planes(dev, old_state); dispc_runtime_put(); drm_atomic_state_free(old_state); /* Complete the commit, wake up any waiter. */ spin_lock(&priv->commit.lock); priv->commit.pending &= ~commit->crtcs; spin_unlock(&priv->commit.lock); wake_up_all(&priv->commit.wait); kfree(commit); } static void omap_atomic_work(struct work_struct *work) { struct omap_atomic_state_commit *commit = container_of(work, struct omap_atomic_state_commit, work); omap_atomic_complete(commit); } static bool omap_atomic_is_pending(struct omap_drm_private *priv, struct omap_atomic_state_commit *commit) { bool pending; spin_lock(&priv->commit.lock); pending = priv->commit.pending & commit->crtcs; spin_unlock(&priv->commit.lock); return pending; } static int omap_atomic_commit(struct drm_device *dev, struct drm_atomic_state *state, bool nonblock) { struct omap_drm_private *priv = dev->dev_private; struct omap_atomic_state_commit *commit; unsigned int i; int ret; ret = drm_atomic_helper_prepare_planes(dev, state); if (ret) return ret; /* Allocate the commit object. */ commit = kzalloc(sizeof(*commit), GFP_KERNEL); if (commit == NULL) { ret = -ENOMEM; goto error; } INIT_WORK(&commit->work, omap_atomic_work); commit->dev = dev; commit->state = state; /* Wait until all affected CRTCs have completed previous commits and * mark them as pending. */ for (i = 0; i < dev->mode_config.num_crtc; ++i) { if (state->crtcs[i]) commit->crtcs |= 1 << drm_crtc_index(state->crtcs[i]); } wait_event(priv->commit.wait, !omap_atomic_is_pending(priv, commit)); spin_lock(&priv->commit.lock); priv->commit.pending |= commit->crtcs; spin_unlock(&priv->commit.lock); /* Swap the state, this is the point of no return. */ drm_atomic_helper_swap_state(dev, state); if (nonblock) schedule_work(&commit->work); else omap_atomic_complete(commit); return 0; error: drm_atomic_helper_cleanup_planes(dev, state); return ret; } static const struct drm_mode_config_funcs omap_mode_config_funcs = { .fb_create = omap_framebuffer_create, .output_poll_changed = omap_fb_output_poll_changed, .atomic_check = drm_atomic_helper_check, .atomic_commit = omap_atomic_commit, }; static int get_connector_type(struct omap_dss_device *dssdev) { switch (dssdev->type) { case OMAP_DISPLAY_TYPE_HDMI: return DRM_MODE_CONNECTOR_HDMIA; case OMAP_DISPLAY_TYPE_DVI: return DRM_MODE_CONNECTOR_DVID; default: return DRM_MODE_CONNECTOR_Unknown; } } static bool channel_used(struct drm_device *dev, enum omap_channel channel) { struct omap_drm_private *priv = dev->dev_private; int i; for (i = 0; i < priv->num_crtcs; i++) { struct drm_crtc *crtc = priv->crtcs[i]; if (omap_crtc_channel(crtc) == channel) return true; } return false; } static void omap_disconnect_dssdevs(void) { struct omap_dss_device *dssdev = NULL; for_each_dss_dev(dssdev) dssdev->driver->disconnect(dssdev); } static int omap_connect_dssdevs(void) { int r; struct omap_dss_device *dssdev = NULL; bool no_displays = true; for_each_dss_dev(dssdev) { r = dssdev->driver->connect(dssdev); if (r == -EPROBE_DEFER) { omap_dss_put_device(dssdev); goto cleanup; } else if (r) { dev_warn(dssdev->dev, "could not connect display: %s\n", dssdev->name); } else { no_displays = false; } } if (no_displays) return -EPROBE_DEFER; return 0; cleanup: /* * if we are deferring probe, we disconnect the devices we previously * connected */ omap_disconnect_dssdevs(); return r; } static int omap_modeset_create_crtc(struct drm_device *dev, int id, enum omap_channel channel) { struct omap_drm_private *priv = dev->dev_private; struct drm_plane *plane; struct drm_crtc *crtc; plane = omap_plane_init(dev, id, DRM_PLANE_TYPE_PRIMARY); if (IS_ERR(plane)) return PTR_ERR(plane); crtc = omap_crtc_init(dev, plane, channel, id); BUG_ON(priv->num_crtcs >= ARRAY_SIZE(priv->crtcs)); priv->crtcs[id] = crtc; priv->num_crtcs++; priv->planes[id] = plane; priv->num_planes++; return 0; } static int omap_modeset_init_properties(struct drm_device *dev) { struct omap_drm_private *priv = dev->dev_private; if (priv->has_dmm) { dev->mode_config.rotation_property = drm_mode_create_rotation_property(dev, BIT(DRM_ROTATE_0) | BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_180) | BIT(DRM_ROTATE_270) | BIT(DRM_REFLECT_X) | BIT(DRM_REFLECT_Y)); if (!dev->mode_config.rotation_property) return -ENOMEM; } priv->zorder_prop = drm_property_create_range(dev, 0, "zorder", 0, 3); if (!priv->zorder_prop) return -ENOMEM; return 0; } static int omap_modeset_init(struct drm_device *dev) { struct omap_drm_private *priv = dev->dev_private; struct omap_dss_device *dssdev = NULL; int num_ovls = dss_feat_get_num_ovls(); int num_mgrs = dss_feat_get_num_mgrs(); int num_crtcs; int i, id = 0; int ret; drm_mode_config_init(dev); omap_drm_irq_install(dev); ret = omap_modeset_init_properties(dev); if (ret < 0) return ret; /* * We usually don't want to create a CRTC for each manager, at least * not until we have a way to expose private planes to userspace. * Otherwise there would not be enough video pipes left for drm planes. * We use the num_crtc argument to limit the number of crtcs we create. */ num_crtcs = min3(num_crtc, num_mgrs, num_ovls); dssdev = NULL; for_each_dss_dev(dssdev) { struct drm_connector *connector; struct drm_encoder *encoder; enum omap_channel channel; struct omap_dss_device *out; if (!omapdss_device_is_connected(dssdev)) continue; encoder = omap_encoder_init(dev, dssdev); if (!encoder) { dev_err(dev->dev, "could not create encoder: %s\n", dssdev->name); return -ENOMEM; } connector = omap_connector_init(dev, get_connector_type(dssdev), dssdev, encoder); if (!connector) { dev_err(dev->dev, "could not create connector: %s\n", dssdev->name); return -ENOMEM; } BUG_ON(priv->num_encoders >= ARRAY_SIZE(priv->encoders)); BUG_ON(priv->num_connectors >= ARRAY_SIZE(priv->connectors)); priv->encoders[priv->num_encoders++] = encoder; priv->connectors[priv->num_connectors++] = connector; drm_mode_connector_attach_encoder(connector, encoder); /* * if we have reached the limit of the crtcs we are allowed to * create, let's not try to look for a crtc for this * panel/encoder and onwards, we will, of course, populate the * the possible_crtcs field for all the encoders with the final * set of crtcs we create */ if (id == num_crtcs) continue; /* * get the recommended DISPC channel for this encoder. For now, * we only try to get create a crtc out of the recommended, the * other possible channels to which the encoder can connect are * not considered. */ out = omapdss_find_output_from_display(dssdev); channel = out->dispc_channel; omap_dss_put_device(out); /* * if this channel hasn't already been taken by a previously * allocated crtc, we create a new crtc for it */ if (!channel_used(dev, channel)) { ret = omap_modeset_create_crtc(dev, id, channel); if (ret < 0) { dev_err(dev->dev, "could not create CRTC (channel %u)\n", channel); return ret; } id++; } } /* * we have allocated crtcs according to the need of the panels/encoders, * adding more crtcs here if needed */ for (; id < num_crtcs; id++) { /* find a free manager for this crtc */ for (i = 0; i < num_mgrs; i++) { if (!channel_used(dev, i)) break; } if (i == num_mgrs) { /* this shouldn't really happen */ dev_err(dev->dev, "no managers left for crtc\n"); return -ENOMEM; } ret = omap_modeset_create_crtc(dev, id, i); if (ret < 0) { dev_err(dev->dev, "could not create CRTC (channel %u)\n", i); return ret; } } /* * Create normal planes for the remaining overlays: */ for (; id < num_ovls; id++) { struct drm_plane *plane; plane = omap_plane_init(dev, id, DRM_PLANE_TYPE_OVERLAY); if (IS_ERR(plane)) return PTR_ERR(plane); BUG_ON(priv->num_planes >= ARRAY_SIZE(priv->planes)); priv->planes[priv->num_planes++] = plane; } for (i = 0; i < priv->num_encoders; i++) { struct drm_encoder *encoder = priv->encoders[i]; struct omap_dss_device *dssdev = omap_encoder_get_dssdev(encoder); struct omap_dss_device *output; output = omapdss_find_output_from_display(dssdev); /* figure out which crtc's we can connect the encoder to: */ encoder->possible_crtcs = 0; for (id = 0; id < priv->num_crtcs; id++) { struct drm_crtc *crtc = priv->crtcs[id]; enum omap_channel crtc_channel; crtc_channel = omap_crtc_channel(crtc); if (output->dispc_channel == crtc_channel) { encoder->possible_crtcs |= (1 << id); break; } } omap_dss_put_device(output); } DBG("registered %d planes, %d crtcs, %d encoders and %d connectors\n", priv->num_planes, priv->num_crtcs, priv->num_encoders, priv->num_connectors); dev->mode_config.min_width = 32; dev->mode_config.min_height = 32; /* note: eventually will need some cpu_is_omapXYZ() type stuff here * to fill in these limits properly on different OMAP generations.. */ dev->mode_config.max_width = 2048; dev->mode_config.max_height = 2048; dev->mode_config.funcs = &omap_mode_config_funcs; drm_mode_config_reset(dev); return 0; } static void omap_modeset_free(struct drm_device *dev) { drm_mode_config_cleanup(dev); } /* * drm ioctl funcs */ static int ioctl_get_param(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct omap_drm_private *priv = dev->dev_private; struct drm_omap_param *args = data; DBG("%p: param=%llu", dev, args->param); switch (args->param) { case OMAP_PARAM_CHIPSET_ID: args->value = priv->omaprev; break; default: DBG("unknown parameter %lld", args->param); return -EINVAL; } return 0; } static int ioctl_set_param(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_omap_param *args = data; switch (args->param) { default: DBG("unknown parameter %lld", args->param); return -EINVAL; } return 0; } #define OMAP_BO_USER_MASK 0x00ffffff /* flags settable by userspace */ static int ioctl_gem_new(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_omap_gem_new *args = data; u32 flags = args->flags & OMAP_BO_USER_MASK; VERB("%p:%p: size=0x%08x, flags=%08x", dev, file_priv, args->size.bytes, flags); return omap_gem_new_handle(dev, file_priv, args->size, flags, &args->handle); } static int ioctl_gem_cpu_prep(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_omap_gem_cpu_prep *args = data; struct drm_gem_object *obj; int ret; VERB("%p:%p: handle=%d, op=%x", dev, file_priv, args->handle, args->op); obj = drm_gem_object_lookup(dev, file_priv, args->handle); if (!obj) return -ENOENT; ret = omap_gem_op_sync(obj, args->op); if (!ret) ret = omap_gem_op_start(obj, args->op); drm_gem_object_unreference_unlocked(obj); return ret; } static int ioctl_gem_cpu_fini(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_omap_gem_cpu_fini *args = data; struct drm_gem_object *obj; int ret; VERB("%p:%p: handle=%d", dev, file_priv, args->handle); obj = drm_gem_object_lookup(dev, file_priv, args->handle); if (!obj) return -ENOENT; /* XXX flushy, flushy */ ret = 0; if (!ret) ret = omap_gem_op_finish(obj, args->op); drm_gem_object_unreference_unlocked(obj); return ret; } static int ioctl_gem_info(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_omap_gem_info *args = data; struct drm_gem_object *obj; int ret = 0; VERB("%p:%p: handle=%d", dev, file_priv, args->handle); obj = drm_gem_object_lookup(dev, file_priv, args->handle); if (!obj) return -ENOENT; args->size = omap_gem_mmap_size(obj); args->offset = omap_gem_mmap_offset(obj); drm_gem_object_unreference_unlocked(obj); return ret; } static const struct drm_ioctl_desc ioctls[DRM_COMMAND_END - DRM_COMMAND_BASE] = { DRM_IOCTL_DEF_DRV(OMAP_GET_PARAM, ioctl_get_param, DRM_AUTH), DRM_IOCTL_DEF_DRV(OMAP_SET_PARAM, ioctl_set_param, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF_DRV(OMAP_GEM_NEW, ioctl_gem_new, DRM_AUTH), DRM_IOCTL_DEF_DRV(OMAP_GEM_CPU_PREP, ioctl_gem_cpu_prep, DRM_AUTH), DRM_IOCTL_DEF_DRV(OMAP_GEM_CPU_FINI, ioctl_gem_cpu_fini, DRM_AUTH), DRM_IOCTL_DEF_DRV(OMAP_GEM_INFO, ioctl_gem_info, DRM_AUTH), }; /* * drm driver funcs */ /** * load - setup chip and create an initial config * @dev: DRM device * @flags: startup flags * * The driver load routine has to do several things: * - initialize the memory manager * - allocate initial config memory * - setup the DRM framebuffer with the allocated memory */ static int dev_load(struct drm_device *dev, unsigned long flags) { struct omap_drm_platform_data *pdata = dev->dev->platform_data; struct omap_drm_private *priv; unsigned int i; int ret; DBG("load: dev=%p", dev); priv = kzalloc(sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; priv->omaprev = pdata->omaprev; dev->dev_private = priv; priv->wq = alloc_ordered_workqueue("omapdrm", 0); init_waitqueue_head(&priv->commit.wait); spin_lock_init(&priv->commit.lock); spin_lock_init(&priv->list_lock); INIT_LIST_HEAD(&priv->obj_list); omap_gem_init(dev); ret = omap_modeset_init(dev); if (ret) { dev_err(dev->dev, "omap_modeset_init failed: ret=%d\n", ret); dev->dev_private = NULL; kfree(priv); return ret; } /* Initialize vblank handling, start with all CRTCs disabled. */ ret = drm_vblank_init(dev, priv->num_crtcs); if (ret) dev_warn(dev->dev, "could not init vblank\n"); for (i = 0; i < priv->num_crtcs; i++) drm_crtc_vblank_off(priv->crtcs[i]); priv->fbdev = omap_fbdev_init(dev); /* store off drm_device for use in pm ops */ dev_set_drvdata(dev->dev, dev); drm_kms_helper_poll_init(dev); return 0; } static int dev_unload(struct drm_device *dev) { struct omap_drm_private *priv = dev->dev_private; DBG("unload: dev=%p", dev); drm_kms_helper_poll_fini(dev); if (priv->fbdev) omap_fbdev_free(dev); omap_modeset_free(dev); omap_gem_deinit(dev); destroy_workqueue(priv->wq); drm_vblank_cleanup(dev); omap_drm_irq_uninstall(dev); kfree(dev->dev_private); dev->dev_private = NULL; dev_set_drvdata(dev->dev, NULL); return 0; } static int dev_open(struct drm_device *dev, struct drm_file *file) { file->driver_priv = NULL; DBG("open: dev=%p, file=%p", dev, file); return 0; } /** * lastclose - clean up after all DRM clients have exited * @dev: DRM device * * Take care of cleaning up after all DRM clients have exited. In the * mode setting case, we want to restore the kernel's initial mode (just * in case the last client left us in a bad state). */ static void dev_lastclose(struct drm_device *dev) { int i; /* we don't support vga_switcheroo.. so just make sure the fbdev * mode is active */ struct omap_drm_private *priv = dev->dev_private; int ret; DBG("lastclose: dev=%p", dev); if (dev->mode_config.rotation_property) { /* need to restore default rotation state.. not sure * if there is a cleaner way to restore properties to * default state? Maybe a flag that properties should * automatically be restored to default state on * lastclose? */ for (i = 0; i < priv->num_crtcs; i++) { drm_object_property_set_value(&priv->crtcs[i]->base, dev->mode_config.rotation_property, 0); } for (i = 0; i < priv->num_planes; i++) { drm_object_property_set_value(&priv->planes[i]->base, dev->mode_config.rotation_property, 0); } } if (priv->fbdev) { ret = drm_fb_helper_restore_fbdev_mode_unlocked(priv->fbdev); if (ret) DBG("failed to restore crtc mode"); } } static const struct vm_operations_struct omap_gem_vm_ops = { .fault = omap_gem_fault, .open = drm_gem_vm_open, .close = drm_gem_vm_close, }; static const struct file_operations omapdriver_fops = { .owner = THIS_MODULE, .open = drm_open, .unlocked_ioctl = drm_ioctl, .release = drm_release, .mmap = omap_gem_mmap, .poll = drm_poll, .read = drm_read, .llseek = noop_llseek, }; static struct drm_driver omap_drm_driver = { .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME | DRIVER_ATOMIC, .load = dev_load, .unload = dev_unload, .open = dev_open, .lastclose = dev_lastclose, .set_busid = drm_platform_set_busid, .get_vblank_counter = drm_vblank_no_hw_counter, .enable_vblank = omap_irq_enable_vblank, .disable_vblank = omap_irq_disable_vblank, #ifdef CONFIG_DEBUG_FS .debugfs_init = omap_debugfs_init, .debugfs_cleanup = omap_debugfs_cleanup, #endif .prime_handle_to_fd = drm_gem_prime_handle_to_fd, .prime_fd_to_handle = drm_gem_prime_fd_to_handle, .gem_prime_export = omap_gem_prime_export, .gem_prime_import = omap_gem_prime_import, .gem_free_object = omap_gem_free_object, .gem_vm_ops = &omap_gem_vm_ops, .dumb_create = omap_gem_dumb_create, .dumb_map_offset = omap_gem_dumb_map_offset, .dumb_destroy = drm_gem_dumb_destroy, .ioctls = ioctls, .num_ioctls = DRM_OMAP_NUM_IOCTLS, .fops = &omapdriver_fops, .name = DRIVER_NAME, .desc = DRIVER_DESC, .date = DRIVER_DATE, .major = DRIVER_MAJOR, .minor = DRIVER_MINOR, .patchlevel = DRIVER_PATCHLEVEL, }; static int pdev_probe(struct platform_device *device) { int r; if (omapdss_is_initialized() == false) return -EPROBE_DEFER; omap_crtc_pre_init(); r = omap_connect_dssdevs(); if (r) { omap_crtc_pre_uninit(); return r; } DBG("%s", device->name); return drm_platform_init(&omap_drm_driver, device); } static int pdev_remove(struct platform_device *device) { DBG(""); drm_put_dev(platform_get_drvdata(device)); omap_disconnect_dssdevs(); omap_crtc_pre_uninit(); return 0; } #ifdef CONFIG_PM_SLEEP static int omap_drm_suspend_all_displays(void) { struct omap_dss_device *dssdev = NULL; for_each_dss_dev(dssdev) { if (!dssdev->driver) continue; if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE) { dssdev->driver->disable(dssdev); dssdev->activate_after_resume = true; } else { dssdev->activate_after_resume = false; } } return 0; } static int omap_drm_resume_all_displays(void) { struct omap_dss_device *dssdev = NULL; for_each_dss_dev(dssdev) { if (!dssdev->driver) continue; if (dssdev->activate_after_resume) { dssdev->driver->enable(dssdev); dssdev->activate_after_resume = false; } } return 0; } static int omap_drm_suspend(struct device *dev) { struct drm_device *drm_dev = dev_get_drvdata(dev); drm_kms_helper_poll_disable(drm_dev); drm_modeset_lock_all(drm_dev); omap_drm_suspend_all_displays(); drm_modeset_unlock_all(drm_dev); return 0; } static int omap_drm_resume(struct device *dev) { struct drm_device *drm_dev = dev_get_drvdata(dev); drm_modeset_lock_all(drm_dev); omap_drm_resume_all_displays(); drm_modeset_unlock_all(drm_dev); drm_kms_helper_poll_enable(drm_dev); return omap_gem_resume(dev); } #endif static SIMPLE_DEV_PM_OPS(omapdrm_pm_ops, omap_drm_suspend, omap_drm_resume); static struct platform_driver pdev = { .driver = { .name = DRIVER_NAME, .pm = &omapdrm_pm_ops, }, .probe = pdev_probe, .remove = pdev_remove, }; static struct platform_driver * const drivers[] = { &omap_dmm_driver, &pdev, }; static int __init omap_drm_init(void) { DBG("init"); return platform_register_drivers(drivers, ARRAY_SIZE(drivers)); } static void __exit omap_drm_fini(void) { DBG("fini"); platform_unregister_drivers(drivers, ARRAY_SIZE(drivers)); } /* need late_initcall() so we load after dss_driver's are loaded */ late_initcall(omap_drm_init); module_exit(omap_drm_fini); MODULE_AUTHOR("Rob Clark "); MODULE_DESCRIPTION("OMAP DRM Display Driver"); MODULE_ALIAS("platform:" DRIVER_NAME); MODULE_LICENSE("GPL v2");