| /* |
| * drivers/gpu/drm/omapdrm/omap_drv.c |
| * |
| * Copyright (C) 2011 Texas Instruments |
| * Author: Rob Clark <rob@ti.com> |
| * |
| * 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 <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include "omap_drv.h" |
| |
| #include "drm_crtc_helper.h" |
| #include "drm_fb_helper.h" |
| #include "omap_dmm_tiler.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); |
| } |
| |
| static const struct drm_mode_config_funcs omap_mode_config_funcs = { |
| .fb_create = omap_framebuffer_create, |
| .output_poll_changed = omap_fb_output_poll_changed, |
| }; |
| |
| 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_DPI: |
| if (!strcmp(dssdev->name, "dvi")) |
| return DRM_MODE_CONNECTOR_DVID; |
| /* fallthrough */ |
| 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 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; |
| |
| drm_mode_config_init(dev); |
| |
| omap_drm_irq_install(dev); |
| |
| /* |
| * 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; |
| |
| if (!dssdev->driver) { |
| dev_warn(dev->dev, "%s has no driver.. skipping it\n", |
| dssdev->name); |
| continue; |
| } |
| |
| if (!(dssdev->driver->get_timings || |
| dssdev->driver->read_edid)) { |
| dev_warn(dev->dev, "%s driver does not support " |
| "get_timings or read_edid.. skipping it!\n", |
| dssdev->name); |
| 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. |
| */ |
| channel = dssdev->output->dispc_channel; |
| |
| /* |
| * 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)) { |
| struct drm_plane *plane; |
| struct drm_crtc *crtc; |
| |
| plane = omap_plane_init(dev, id, true); |
| 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++; |
| |
| 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)) { |
| struct drm_plane *plane; |
| struct drm_crtc *crtc; |
| |
| plane = omap_plane_init(dev, id, true); |
| crtc = omap_crtc_init(dev, plane, i, id); |
| |
| BUG_ON(priv->num_crtcs >= |
| ARRAY_SIZE(priv->crtcs)); |
| |
| priv->crtcs[id] = crtc; |
| priv->num_crtcs++; |
| |
| priv->planes[id] = plane; |
| priv->num_planes++; |
| |
| break; |
| } else { |
| continue; |
| } |
| } |
| |
| if (i == num_mgrs) { |
| /* this shouldn't really happen */ |
| dev_err(dev->dev, "no managers left for crtc\n"); |
| return -ENOMEM; |
| } |
| } |
| |
| /* |
| * Create normal planes for the remaining overlays: |
| */ |
| for (; id < num_ovls; id++) { |
| struct drm_plane *plane = omap_plane_init(dev, id, false); |
| |
| 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); |
| |
| /* 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; |
| enum omap_dss_output_id supported_outputs; |
| |
| crtc_channel = omap_crtc_channel(crtc); |
| supported_outputs = |
| dss_feat_get_supported_outputs(crtc_channel); |
| |
| if (supported_outputs & dssdev->output->id) |
| encoder->possible_crtcs |= (1 << id); |
| } |
| } |
| |
| 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; |
| |
| 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; |
| } |
| |
| static int ioctl_gem_new(struct drm_device *dev, void *data, |
| struct drm_file *file_priv) |
| { |
| struct drm_omap_gem_new *args = data; |
| VERB("%p:%p: size=0x%08x, flags=%08x", dev, file_priv, |
| args->size.bytes, args->flags); |
| return omap_gem_new_handle(dev, file_priv, args->size, |
| args->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 struct drm_ioctl_desc ioctls[DRM_COMMAND_END - DRM_COMMAND_BASE] = { |
| DRM_IOCTL_DEF_DRV(OMAP_GET_PARAM, ioctl_get_param, DRM_UNLOCKED|DRM_AUTH), |
| DRM_IOCTL_DEF_DRV(OMAP_SET_PARAM, ioctl_set_param, DRM_UNLOCKED|DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
| DRM_IOCTL_DEF_DRV(OMAP_GEM_NEW, ioctl_gem_new, DRM_UNLOCKED|DRM_AUTH), |
| DRM_IOCTL_DEF_DRV(OMAP_GEM_CPU_PREP, ioctl_gem_cpu_prep, DRM_UNLOCKED|DRM_AUTH), |
| DRM_IOCTL_DEF_DRV(OMAP_GEM_CPU_FINI, ioctl_gem_cpu_fini, DRM_UNLOCKED|DRM_AUTH), |
| DRM_IOCTL_DEF_DRV(OMAP_GEM_INFO, ioctl_gem_info, DRM_UNLOCKED|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; |
| 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_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; |
| } |
| |
| ret = drm_vblank_init(dev, priv->num_crtcs); |
| if (ret) |
| dev_warn(dev->dev, "could not init vblank\n"); |
| |
| priv->fbdev = omap_fbdev_init(dev); |
| if (!priv->fbdev) { |
| dev_warn(dev->dev, "omap_fbdev_init failed\n"); |
| /* well, limp along without an fbdev.. maybe X11 will work? */ |
| } |
| |
| /* 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); |
| drm_vblank_cleanup(dev); |
| omap_drm_irq_uninstall(dev); |
| |
| omap_fbdev_free(dev); |
| omap_modeset_free(dev); |
| omap_gem_deinit(dev); |
| |
| flush_workqueue(priv->wq); |
| destroy_workqueue(priv->wq); |
| |
| 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; |
| } |
| |
| static int dev_firstopen(struct drm_device *dev) |
| { |
| DBG("firstopen: dev=%p", dev); |
| 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 (priv->rotation_prop) { |
| /* 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, |
| priv->rotation_prop, 0); |
| } |
| |
| for (i = 0; i < priv->num_planes; i++) { |
| drm_object_property_set_value(&priv->planes[i]->base, |
| priv->rotation_prop, 0); |
| } |
| } |
| |
| drm_modeset_lock_all(dev); |
| ret = drm_fb_helper_restore_fbdev_mode(priv->fbdev); |
| drm_modeset_unlock_all(dev); |
| if (ret) |
| DBG("failed to restore crtc mode"); |
| } |
| |
| static void dev_preclose(struct drm_device *dev, struct drm_file *file) |
| { |
| DBG("preclose: dev=%p", dev); |
| } |
| |
| static void dev_postclose(struct drm_device *dev, struct drm_file *file) |
| { |
| DBG("postclose: dev=%p, file=%p", dev, file); |
| } |
| |
| 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, |
| .fasync = drm_fasync, |
| .read = drm_read, |
| .llseek = noop_llseek, |
| }; |
| |
| static struct drm_driver omap_drm_driver = { |
| .driver_features = |
| DRIVER_HAVE_IRQ | DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME, |
| .load = dev_load, |
| .unload = dev_unload, |
| .open = dev_open, |
| .firstopen = dev_firstopen, |
| .lastclose = dev_lastclose, |
| .preclose = dev_preclose, |
| .postclose = dev_postclose, |
| .get_vblank_counter = drm_vblank_count, |
| .enable_vblank = omap_irq_enable_vblank, |
| .disable_vblank = omap_irq_disable_vblank, |
| .irq_preinstall = omap_irq_preinstall, |
| .irq_postinstall = omap_irq_postinstall, |
| .irq_uninstall = omap_irq_uninstall, |
| .irq_handler = omap_irq_handler, |
| #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_init_object = omap_gem_init_object, |
| .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 = omap_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_suspend(struct platform_device *pDevice, pm_message_t state) |
| { |
| DBG(""); |
| return 0; |
| } |
| |
| static int pdev_resume(struct platform_device *device) |
| { |
| DBG(""); |
| return 0; |
| } |
| |
| static void pdev_shutdown(struct platform_device *device) |
| { |
| DBG(""); |
| } |
| |
| static int pdev_probe(struct platform_device *device) |
| { |
| DBG("%s", device->name); |
| return drm_platform_init(&omap_drm_driver, device); |
| } |
| |
| static int pdev_remove(struct platform_device *device) |
| { |
| DBG(""); |
| drm_platform_exit(&omap_drm_driver, device); |
| |
| platform_driver_unregister(&omap_dmm_driver); |
| return 0; |
| } |
| |
| #ifdef CONFIG_PM |
| static const struct dev_pm_ops omapdrm_pm_ops = { |
| .resume = omap_gem_resume, |
| }; |
| #endif |
| |
| static struct platform_driver pdev = { |
| .driver = { |
| .name = DRIVER_NAME, |
| .owner = THIS_MODULE, |
| #ifdef CONFIG_PM |
| .pm = &omapdrm_pm_ops, |
| #endif |
| }, |
| .probe = pdev_probe, |
| .remove = pdev_remove, |
| .suspend = pdev_suspend, |
| .resume = pdev_resume, |
| .shutdown = pdev_shutdown, |
| }; |
| |
| static int __init omap_drm_init(void) |
| { |
| DBG("init"); |
| if (platform_driver_register(&omap_dmm_driver)) { |
| /* we can continue on without DMM.. so not fatal */ |
| dev_err(NULL, "DMM registration failed\n"); |
| } |
| return platform_driver_register(&pdev); |
| } |
| |
| static void __exit omap_drm_fini(void) |
| { |
| DBG("fini"); |
| platform_driver_unregister(&pdev); |
| } |
| |
| /* 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"); |