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- // SPDX-License-Identifier: GPL-2.0-only
- /*
- * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
- * Author: Rob Clark <rob@ti.com>
- */
- #include <linux/dma-mapping.h>
- #include <linux/platform_device.h>
- #include <linux/sort.h>
- #include <linux/sys_soc.h>
- #include <drm/drm_atomic.h>
- #include <drm/drm_atomic_helper.h>
- #include <drm/drm_bridge.h>
- #include <drm/drm_bridge_connector.h>
- #include <drm/drm_drv.h>
- #include <drm/drm_fb_helper.h>
- #include <drm/drm_file.h>
- #include <drm/drm_ioctl.h>
- #include <drm/drm_panel.h>
- #include <drm/drm_prime.h>
- #include <drm/drm_probe_helper.h>
- #include <drm/drm_vblank.h>
- #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 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,
- .compat_ioctl = drm_compat_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_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_export = omap_gem_prime_export,
- .gem_prime_import = omap_gem_prime_import,
- .gem_free_object_unlocked = 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,
- .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 <rob@ti.com>");
- MODULE_DESCRIPTION("OMAP DRM Display Driver");
- MODULE_ALIAS("platform:" DRIVER_NAME);
- MODULE_LICENSE("GPL v2");
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