diff options
Diffstat (limited to 'drivers/gpu/drm/vc4/vc4_drv.c')
| -rw-r--r-- | drivers/gpu/drm/vc4/vc4_drv.c | 284 |
1 files changed, 284 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c new file mode 100644 index 000000000000..3c3ccffbc7f5 --- /dev/null +++ b/drivers/gpu/drm/vc4/vc4_drv.c @@ -0,0 +1,284 @@ +/* + * Copyright (C) 2014-2015 Broadcom + * Copyright (C) 2013 Red Hat + * + * 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. + */ + +#include <linux/clk.h> +#include <linux/component.h> +#include <linux/device.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/of_platform.h> +#include <linux/platform_device.h> + +#include "vc4_drv.h" +#include "vc4_regs.h" + +#define DRIVER_NAME "vc4" +#define DRIVER_DESC "Broadcom VC4 graphics" +#define DRIVER_DATE "20140616" +#define DRIVER_MAJOR 0 +#define DRIVER_MINOR 0 +#define DRIVER_PATCHLEVEL 0 + +/* Helper function for mapping the regs on a platform device. */ +void __iomem *vc4_ioremap_regs(struct platform_device *dev, int index) +{ + struct resource *res; + void __iomem *map; + + res = platform_get_resource(dev, IORESOURCE_MEM, index); + map = devm_ioremap_resource(&dev->dev, res); + if (IS_ERR(map)) { + DRM_ERROR("Failed to map registers: %ld\n", PTR_ERR(map)); + return map; + } + + return map; +} + +static void vc4_drm_preclose(struct drm_device *dev, struct drm_file *file) +{ + struct drm_crtc *crtc; + + list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) + vc4_cancel_page_flip(crtc, file); +} + +static const struct file_operations vc4_drm_fops = { + .owner = THIS_MODULE, + .open = drm_open, + .release = drm_release, + .unlocked_ioctl = drm_ioctl, + .mmap = drm_gem_cma_mmap, + .poll = drm_poll, + .read = drm_read, +#ifdef CONFIG_COMPAT + .compat_ioctl = drm_compat_ioctl, +#endif + .llseek = noop_llseek, +}; + +static const struct drm_ioctl_desc vc4_drm_ioctls[] = { +}; + +static struct drm_driver vc4_drm_driver = { + .driver_features = (DRIVER_MODESET | + DRIVER_ATOMIC | + DRIVER_GEM | + DRIVER_PRIME), + .preclose = vc4_drm_preclose, + + .enable_vblank = vc4_enable_vblank, + .disable_vblank = vc4_disable_vblank, + .get_vblank_counter = drm_vblank_count, + +#if defined(CONFIG_DEBUG_FS) + .debugfs_init = vc4_debugfs_init, + .debugfs_cleanup = vc4_debugfs_cleanup, +#endif + + .gem_free_object = drm_gem_cma_free_object, + .gem_vm_ops = &drm_gem_cma_vm_ops, + + .prime_handle_to_fd = drm_gem_prime_handle_to_fd, + .prime_fd_to_handle = drm_gem_prime_fd_to_handle, + .gem_prime_import = drm_gem_prime_import, + .gem_prime_export = drm_gem_prime_export, + .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table, + .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table, + .gem_prime_vmap = drm_gem_cma_prime_vmap, + .gem_prime_vunmap = drm_gem_cma_prime_vunmap, + .gem_prime_mmap = drm_gem_cma_prime_mmap, + + .dumb_create = vc4_dumb_create, + .dumb_map_offset = drm_gem_cma_dumb_map_offset, + .dumb_destroy = drm_gem_dumb_destroy, + + .ioctls = vc4_drm_ioctls, + .num_ioctls = ARRAY_SIZE(vc4_drm_ioctls), + .fops = &vc4_drm_fops, + + .name = DRIVER_NAME, + .desc = DRIVER_DESC, + .date = DRIVER_DATE, + .major = DRIVER_MAJOR, + .minor = DRIVER_MINOR, + .patchlevel = DRIVER_PATCHLEVEL, +}; + +static int compare_dev(struct device *dev, void *data) +{ + return dev == data; +} + +static void vc4_match_add_drivers(struct device *dev, + struct component_match **match, + struct platform_driver *const *drivers, + int count) +{ + int i; + + for (i = 0; i < count; i++) { + struct device_driver *drv = &drivers[i]->driver; + struct device *p = NULL, *d; + + while ((d = bus_find_device(&platform_bus_type, p, drv, + (void *)platform_bus_type.match))) { + put_device(p); + component_match_add(dev, match, compare_dev, d); + p = d; + } + put_device(p); + } +} + +static int vc4_drm_bind(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct drm_device *drm; + struct drm_connector *connector; + struct vc4_dev *vc4; + int ret = 0; + + dev->coherent_dma_mask = DMA_BIT_MASK(32); + + vc4 = devm_kzalloc(dev, sizeof(*vc4), GFP_KERNEL); + if (!vc4) + return -ENOMEM; + + drm = drm_dev_alloc(&vc4_drm_driver, dev); + if (!drm) + return -ENOMEM; + platform_set_drvdata(pdev, drm); + vc4->dev = drm; + drm->dev_private = vc4; + + drm_dev_set_unique(drm, dev_name(dev)); + + drm_mode_config_init(drm); + if (ret) + goto unref; + + ret = component_bind_all(dev, drm); + if (ret) + goto unref; + + ret = drm_dev_register(drm, 0); + if (ret < 0) + goto unbind_all; + + /* Connector registration has to occur after DRM device + * registration, because it creates sysfs entries based on the + * DRM device. + */ + list_for_each_entry(connector, &drm->mode_config.connector_list, head) { + ret = drm_connector_register(connector); + if (ret) + goto unregister; + } + + vc4_kms_load(drm); + + return 0; + +unregister: + drm_dev_unregister(drm); +unbind_all: + component_unbind_all(dev, drm); +unref: + drm_dev_unref(drm); + return ret; +} + +static void vc4_drm_unbind(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct drm_device *drm = platform_get_drvdata(pdev); + + drm_mode_config_cleanup(drm); + + drm_put_dev(drm); +} + +static const struct component_master_ops vc4_drm_ops = { + .bind = vc4_drm_bind, + .unbind = vc4_drm_unbind, +}; + +static struct platform_driver *const component_drivers[] = { + &vc4_hdmi_driver, + &vc4_crtc_driver, + &vc4_hvs_driver, +}; + +static int vc4_platform_drm_probe(struct platform_device *pdev) +{ + struct component_match *match = NULL; + struct device *dev = &pdev->dev; + + vc4_match_add_drivers(dev, &match, + component_drivers, ARRAY_SIZE(component_drivers)); + + return component_master_add_with_match(dev, &vc4_drm_ops, match); +} + +static int vc4_platform_drm_remove(struct platform_device *pdev) +{ + component_master_del(&pdev->dev, &vc4_drm_ops); + + return 0; +} + +static const struct of_device_id vc4_of_match[] = { + { .compatible = "brcm,bcm2835-vc4", }, + {}, +}; +MODULE_DEVICE_TABLE(of, vc4_of_match); + +static struct platform_driver vc4_platform_driver = { + .probe = vc4_platform_drm_probe, + .remove = vc4_platform_drm_remove, + .driver = { + .name = "vc4-drm", + .owner = THIS_MODULE, + .of_match_table = vc4_of_match, + }, +}; + +static int __init vc4_drm_register(void) +{ + int i, ret; + + for (i = 0; i < ARRAY_SIZE(component_drivers); i++) { + ret = platform_driver_register(component_drivers[i]); + if (ret) { + while (--i >= 0) + platform_driver_unregister(component_drivers[i]); + return ret; + } + } + return platform_driver_register(&vc4_platform_driver); +} + +static void __exit vc4_drm_unregister(void) +{ + int i; + + for (i = ARRAY_SIZE(component_drivers) - 1; i >= 0; i--) + platform_driver_unregister(component_drivers[i]); + + platform_driver_unregister(&vc4_platform_driver); +} + +module_init(vc4_drm_register); +module_exit(vc4_drm_unregister); + +MODULE_ALIAS("platform:vc4-drm"); +MODULE_DESCRIPTION("Broadcom VC4 DRM Driver"); +MODULE_AUTHOR("Eric Anholt <eric@anholt.net>"); +MODULE_LICENSE("GPL v2"); |