// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com/ * Author: Rob Clark */ #include #include #include #include #include #include #include #include #include #include #include #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 /* * 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_atomic_wait_for_completion(struct drm_device *dev, struct drm_atomic_state *old_state) { struct drm_crtc_state *new_crtc_state; struct drm_crtc *crtc; unsigned int i; int ret; for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) { if (!new_crtc_state->active) continue; ret = omap_crtc_wait_pending(crtc); if (!ret) dev_warn(dev->dev, "atomic complete timeout (pipe %u)!\n", i); } } static void omap_atomic_commit_tail(struct drm_atomic_state *old_state) { struct drm_device *dev = old_state->dev; struct omap_drm_private *priv = dev->dev_private; priv->dispc_ops->runtime_get(priv->dispc); /* Apply the atomic update. */ drm_atomic_helper_commit_modeset_disables(dev, old_state); if (priv->omaprev != 0x3430) { /* With the current dss dispc implementation we have to enable * the new modeset before we can commit planes. The dispc ovl * configuration relies on the video mode configuration been * written into the HW when the ovl configuration is * calculated. * * This approach is not ideal because after a mode change the * plane update is executed only after the first vblank * interrupt. The dispc implementation should be fixed so that * it is able use uncommitted drm state information. */ drm_atomic_helper_commit_modeset_enables(dev, old_state); omap_atomic_wait_for_completion(dev, old_state); drm_atomic_helper_commit_planes(dev, old_state, 0); drm_atomic_helper_commit_hw_done(old_state); } else { /* * OMAP3 DSS seems to have issues with the work-around above, * resulting in endless sync losts if a crtc is enabled without * a plane. For now, skip the WA for OMAP3. */ drm_atomic_helper_commit_planes(dev, old_state, 0); drm_atomic_helper_commit_modeset_enables(dev, old_state); drm_atomic_helper_commit_hw_done(old_state); } /* * Wait for completion of the page flips to ensure that old buffers * can't be touched by the hardware anymore before cleaning up planes. */ omap_atomic_wait_for_completion(dev, old_state); drm_atomic_helper_cleanup_planes(dev, old_state); priv->dispc_ops->runtime_put(priv->dispc); } static const struct drm_mode_config_helper_funcs omap_mode_config_helper_funcs = { .atomic_commit_tail = omap_atomic_commit_tail, }; static const struct drm_mode_config_funcs omap_mode_config_funcs = { .fb_create = omap_framebuffer_create, .output_poll_changed = drm_fb_helper_output_poll_changed, .atomic_check = drm_atomic_helper_check, .atomic_commit = drm_atomic_helper_commit, }; static void omap_disconnect_pipelines(struct drm_device *ddev) { struct omap_drm_private *priv = ddev->dev_private; unsigned int i; for (i = 0; i < priv->num_pipes; i++) { struct omap_drm_pipeline *pipe = &priv->pipes[i]; omapdss_device_disconnect(NULL, pipe->output); omapdss_device_put(pipe->output); pipe->output = NULL; } memset(&priv->channels, 0, sizeof(priv->channels)); priv->num_pipes = 0; } static int omap_connect_pipelines(struct drm_device *ddev) { struct omap_drm_private *priv = ddev->dev_private; struct omap_dss_device *output = NULL; int r; for_each_dss_output(output) { r = omapdss_device_connect(priv->dss, NULL, output); if (r == -EPROBE_DEFER) { omapdss_device_put(output); return r; } else if (r) { dev_warn(output->dev, "could not connect output %s\n", output->name); } else { struct omap_drm_pipeline *pipe; pipe = &priv->pipes[priv->num_pipes++]; pipe->output = omapdss_device_get(output); if (priv->num_pipes == ARRAY_SIZE(priv->pipes)) { /* To balance the 'for_each_dss_output' loop */ omapdss_device_put(output); break; } } } return 0; } static int omap_compare_pipelines(const void *a, const void *b) { const struct omap_drm_pipeline *pipe1 = a; const struct omap_drm_pipeline *pipe2 = b; if (pipe1->alias_id > pipe2->alias_id) return 1; else if (pipe1->alias_id < pipe2->alias_id) return -1; return 0; } static int omap_modeset_init_properties(struct drm_device *dev) { struct omap_drm_private *priv = dev->dev_private; unsigned int num_planes = priv->dispc_ops->get_num_ovls(priv->dispc); priv->zorder_prop = drm_property_create_range(dev, 0, "zorder", 0, num_planes - 1); if (!priv->zorder_prop) return -ENOMEM; return 0; } static int omap_display_id(struct omap_dss_device *output) { struct device_node *node = NULL; if (output->next) { struct omap_dss_device *display = output; while (display->next) display = display->next; node = display->dev->of_node; } else if (output->bridge) { struct drm_bridge *bridge = output->bridge; while (drm_bridge_get_next_bridge(bridge)) bridge = drm_bridge_get_next_bridge(bridge); node = bridge->of_node; } return node ? of_alias_get_id(node, "display") : -ENODEV; } static int omap_modeset_init(struct drm_device *dev) { struct omap_drm_private *priv = dev->dev_private; int num_ovls = priv->dispc_ops->get_num_ovls(priv->dispc); int num_mgrs = priv->dispc_ops->get_num_mgrs(priv->dispc); unsigned int i; int ret; u32 plane_crtc_mask; if (!omapdss_stack_is_ready()) return -EPROBE_DEFER; drm_mode_config_init(dev); ret = omap_modeset_init_properties(dev); if (ret < 0) return ret; /* * This function creates exactly one connector, encoder, crtc, * and primary plane per each connected dss-device. Each * connector->encoder->crtc chain is expected to be separate * and each crtc is connect to a single dss-channel. If the * configuration does not match the expectations or exceeds * the available resources, the configuration is rejected. */ ret = omap_connect_pipelines(dev); if (ret < 0) return ret; if (priv->num_pipes > num_mgrs || priv->num_pipes > num_ovls) { dev_err(dev->dev, "%s(): Too many connected displays\n", __func__); return -EINVAL; } /* Create all planes first. They can all be put to any CRTC. */ plane_crtc_mask = (1 << priv->num_pipes) - 1; for (i = 0; i < num_ovls; i++) { enum drm_plane_type type = i < priv->num_pipes ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY; struct drm_plane *plane; if (WARN_ON(priv->num_planes >= ARRAY_SIZE(priv->planes))) return -EINVAL; plane = omap_plane_init(dev, i, type, plane_crtc_mask); if (IS_ERR(plane)) return PTR_ERR(plane); priv->planes[priv->num_planes++] = plane; } /* * Create the encoders, attach the bridges and get the pipeline alias * IDs. */ for (i = 0; i < priv->num_pipes; i++) { struct omap_drm_pipeline *pipe = &priv->pipes[i]; int id; pipe->encoder = omap_encoder_init(dev, pipe->output); if (!pipe->encoder) return -ENOMEM; if (pipe->output->bridge) { ret = drm_bridge_attach(pipe->encoder, pipe->output->bridge, NULL, DRM_BRIDGE_ATTACH_NO_CONNECTOR); if (ret < 0) { dev_err(priv->dev, "unable to attach bridge %pOF\n", pipe->output->bridge->of_node); return ret; } } id = omap_display_id(pipe->output); pipe->alias_id = id >= 0 ? id : i; } /* Sort the pipelines by DT aliases. */ sort(priv->pipes, priv->num_pipes, sizeof(priv->pipes[0]), omap_compare_pipelines, NULL); /* * Populate the pipeline lookup table by DISPC channel. Only one display * is allowed per channel. */ for (i = 0; i < priv->num_pipes; ++i) { struct omap_drm_pipeline *pipe = &priv->pipes[i]; enum omap_channel channel = pipe->output->dispc_channel; if (WARN_ON(priv->channels[channel] != NULL)) return -EINVAL; priv->channels[channel] = pipe; } /* Create the connectors and CRTCs. */ for (i = 0; i < priv->num_pipes; i++) { struct omap_drm_pipeline *pipe = &priv->pipes[i]; struct drm_encoder *encoder = pipe->encoder; struct drm_crtc *crtc; if (pipe->output->next) { pipe->connector = omap_connector_init(dev, pipe->output, encoder); if (!pipe->connector) return -ENOMEM; } else { pipe->connector = drm_bridge_connector_init(dev, encoder); if (IS_ERR(pipe->connector)) { dev_err(priv->dev, "unable to create bridge connector for %s\n", pipe->output->name); return PTR_ERR(pipe->connector); } } drm_connector_attach_encoder(pipe->connector, encoder); crtc = omap_crtc_init(dev, pipe, priv->planes[i]); if (IS_ERR(crtc)) return PTR_ERR(crtc); encoder->possible_crtcs = 1 << i; pipe->crtc = crtc; } DBG("registered %u planes, %u crtcs/encoders/connectors\n", priv->num_planes, priv->num_pipes); dev->mode_config.min_width = 8; dev->mode_config.min_height = 2; /* * Note: these values are used for multiple independent things: * connector mode filtering, buffer sizes, crtc sizes... * Use big enough values here to cover all use cases, and do more * specific checking in the respective code paths. */ dev->mode_config.max_width = 8192; dev->mode_config.max_height = 8192; /* We want the zpos to be normalized */ dev->mode_config.normalize_zpos = true; dev->mode_config.funcs = &omap_mode_config_funcs; dev->mode_config.helper_private = &omap_mode_config_helper_funcs; drm_mode_config_reset(dev); omap_drm_irq_install(dev); return 0; } static void omap_modeset_fini(struct drm_device *ddev) { omap_drm_irq_uninstall(ddev); drm_mode_config_cleanup(ddev); } /* * Enable the HPD in external components if supported */ static void omap_modeset_enable_external_hpd(struct drm_device *ddev) { struct omap_drm_private *priv = ddev->dev_private; unsigned int i; for (i = 0; i < priv->num_pipes; i++) { struct drm_connector *connector = priv->pipes[i].connector; if (!connector) continue; if (priv->pipes[i].output->bridge) drm_bridge_connector_enable_hpd(connector); } } /* * Disable the HPD in external components if supported */ static void omap_modeset_disable_external_hpd(struct drm_device *ddev) { struct omap_drm_private *priv = ddev->dev_private; unsigned int i; for (i = 0; i < priv->num_pipes; i++) { struct drm_connector *connector = priv->pipes[i].connector; if (!connector) continue; if (priv->pipes[i].output->bridge) drm_bridge_connector_disable_hpd(connector); } } /* * 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; } #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_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(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_put(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_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(OMAP_SET_PARAM, drm_invalid_op, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY), DRM_IOCTL_DEF_DRV(OMAP_GEM_NEW, ioctl_gem_new, DRM_RENDER_ALLOW), /* Deprecated, to be removed. */ DRM_IOCTL_DEF_DRV(OMAP_GEM_CPU_PREP, drm_noop, DRM_RENDER_ALLOW), /* Deprecated, to be removed. */ DRM_IOCTL_DEF_DRV(OMAP_GEM_CPU_FINI, drm_noop, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(OMAP_GEM_INFO, ioctl_gem_info, DRM_RENDER_ALLOW), }; /* * drm driver funcs */ 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; } static const struct file_operations omapdriver_fops = { .owner = THIS_MODULE, .open = drm_open, .unlocked_ioctl = drm_ioctl, .compat_ioctl = drm_compat_ioctl, .release = drm_release, .mmap = omap_gem_mmap, .poll = drm_poll, .read = drm_read, .llseek = noop_llseek, }; static const struct drm_driver omap_drm_driver = { .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC | DRIVER_RENDER, .open = dev_open, .lastclose = drm_fb_helper_lastclose, #ifdef CONFIG_DEBUG_FS .debugfs_init = omap_debugfs_init, #endif .prime_handle_to_fd = drm_gem_prime_handle_to_fd, .prime_fd_to_handle = drm_gem_prime_fd_to_handle, .gem_prime_import = omap_gem_prime_import, .dumb_create = omap_gem_dumb_create, .dumb_map_offset = omap_gem_dumb_map_offset, .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 const struct soc_device_attribute omapdrm_soc_devices[] = { { .family = "OMAP3", .data = (void *)0x3430 }, { .family = "OMAP4", .data = (void *)0x4430 }, { .family = "OMAP5", .data = (void *)0x5430 }, { .family = "DRA7", .data = (void *)0x0752 }, { /* sentinel */ } }; static int omapdrm_init(struct omap_drm_private *priv, struct device *dev) { const struct soc_device_attribute *soc; struct drm_device *ddev; int ret; DBG("%s", dev_name(dev)); /* Allocate and initialize the DRM device. */ ddev = drm_dev_alloc(&omap_drm_driver, dev); if (IS_ERR(ddev)) return PTR_ERR(ddev); priv->ddev = ddev; ddev->dev_private = priv; priv->dev = dev; priv->dss = omapdss_get_dss(); priv->dispc = dispc_get_dispc(priv->dss); priv->dispc_ops = dispc_get_ops(priv->dss); omap_crtc_pre_init(priv); soc = soc_device_match(omapdrm_soc_devices); priv->omaprev = soc ? (unsigned int)soc->data : 0; priv->wq = alloc_ordered_workqueue("omapdrm", 0); mutex_init(&priv->list_lock); INIT_LIST_HEAD(&priv->obj_list); /* Get memory bandwidth limits */ if (priv->dispc_ops->get_memory_bandwidth_limit) priv->max_bandwidth = priv->dispc_ops->get_memory_bandwidth_limit(priv->dispc); omap_gem_init(ddev); ret = omap_modeset_init(ddev); if (ret) { dev_err(priv->dev, "omap_modeset_init failed: ret=%d\n", ret); goto err_gem_deinit; } /* Initialize vblank handling, start with all CRTCs disabled. */ ret = drm_vblank_init(ddev, priv->num_pipes); if (ret) { dev_err(priv->dev, "could not init vblank\n"); goto err_cleanup_modeset; } omap_fbdev_init(ddev); drm_kms_helper_poll_init(ddev); omap_modeset_enable_external_hpd(ddev); /* * Register the DRM device with the core and the connectors with * sysfs. */ ret = drm_dev_register(ddev, 0); if (ret) goto err_cleanup_helpers; return 0; err_cleanup_helpers: omap_modeset_disable_external_hpd(ddev); drm_kms_helper_poll_fini(ddev); omap_fbdev_fini(ddev); err_cleanup_modeset: omap_modeset_fini(ddev); err_gem_deinit: omap_gem_deinit(ddev); destroy_workqueue(priv->wq); omap_disconnect_pipelines(ddev); omap_crtc_pre_uninit(priv); drm_dev_put(ddev); return ret; } static void omapdrm_cleanup(struct omap_drm_private *priv) { struct drm_device *ddev = priv->ddev; DBG(""); drm_dev_unregister(ddev); omap_modeset_disable_external_hpd(ddev); drm_kms_helper_poll_fini(ddev); omap_fbdev_fini(ddev); drm_atomic_helper_shutdown(ddev); omap_modeset_fini(ddev); omap_gem_deinit(ddev); destroy_workqueue(priv->wq); omap_disconnect_pipelines(ddev); omap_crtc_pre_uninit(priv); drm_dev_put(ddev); } static int pdev_probe(struct platform_device *pdev) { struct omap_drm_private *priv; int ret; if (omapdss_is_initialized() == false) return -EPROBE_DEFER; ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); if (ret) { dev_err(&pdev->dev, "Failed to set the DMA mask\n"); return ret; } /* Allocate and initialize the driver private structure. */ priv = kzalloc(sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; platform_set_drvdata(pdev, priv); ret = omapdrm_init(priv, &pdev->dev); if (ret < 0) kfree(priv); return ret; } static int pdev_remove(struct platform_device *pdev) { struct omap_drm_private *priv = platform_get_drvdata(pdev); omapdrm_cleanup(priv); kfree(priv); return 0; } #ifdef CONFIG_PM_SLEEP static int omap_drm_suspend(struct device *dev) { struct omap_drm_private *priv = dev_get_drvdata(dev); struct drm_device *drm_dev = priv->ddev; return drm_mode_config_helper_suspend(drm_dev); } static int omap_drm_resume(struct device *dev) { struct omap_drm_private *priv = dev_get_drvdata(dev); struct drm_device *drm_dev = priv->ddev; drm_mode_config_helper_resume(drm_dev); return omap_gem_resume(drm_dev); } #endif static SIMPLE_DEV_PM_OPS(omapdrm_pm_ops, omap_drm_suspend, omap_drm_resume); static struct platform_driver pdev = { .driver = { .name = "omapdrm", .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");