2 * Copyright (C) 2014-2015 Broadcom
3 * Copyright (C) 2013 Red Hat
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
10 #include <linux/clk.h>
11 #include <linux/component.h>
12 #include <linux/device.h>
14 #include <linux/module.h>
15 #include <linux/of_platform.h>
16 #include <linux/platform_device.h>
17 #include "drm_fb_cma_helper.h"
22 #define DRIVER_NAME "vc4"
23 #define DRIVER_DESC "Broadcom VC4 graphics"
24 #define DRIVER_DATE "20140616"
25 #define DRIVER_MAJOR 0
26 #define DRIVER_MINOR 0
27 #define DRIVER_PATCHLEVEL 0
29 /* Helper function for mapping the regs on a platform device. */
30 void __iomem *vc4_ioremap_regs(struct platform_device *dev, int index)
35 res = platform_get_resource(dev, IORESOURCE_MEM, index);
36 map = devm_ioremap_resource(&dev->dev, res);
38 DRM_ERROR("Failed to map registers: %ld\n", PTR_ERR(map));
45 static void vc4_drm_preclose(struct drm_device *dev, struct drm_file *file)
47 struct drm_crtc *crtc;
49 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
50 vc4_cancel_page_flip(crtc, file);
53 static void vc4_lastclose(struct drm_device *dev)
55 struct vc4_dev *vc4 = to_vc4_dev(dev);
58 drm_fbdev_cma_restore_mode(vc4->fbdev);
61 static const struct file_operations vc4_drm_fops = {
64 .release = drm_release,
65 .unlocked_ioctl = drm_ioctl,
66 .mmap = drm_gem_cma_mmap,
70 .compat_ioctl = drm_compat_ioctl,
72 .llseek = noop_llseek,
75 static const struct drm_ioctl_desc vc4_drm_ioctls[] = {
78 static struct drm_driver vc4_drm_driver = {
79 .driver_features = (DRIVER_MODESET |
83 .lastclose = vc4_lastclose,
84 .preclose = vc4_drm_preclose,
86 .enable_vblank = vc4_enable_vblank,
87 .disable_vblank = vc4_disable_vblank,
88 .get_vblank_counter = drm_vblank_count,
90 #if defined(CONFIG_DEBUG_FS)
91 .debugfs_init = vc4_debugfs_init,
92 .debugfs_cleanup = vc4_debugfs_cleanup,
95 .gem_free_object = drm_gem_cma_free_object,
96 .gem_vm_ops = &drm_gem_cma_vm_ops,
98 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
99 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
100 .gem_prime_import = drm_gem_prime_import,
101 .gem_prime_export = drm_gem_prime_export,
102 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
103 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
104 .gem_prime_vmap = drm_gem_cma_prime_vmap,
105 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
106 .gem_prime_mmap = drm_gem_cma_prime_mmap,
108 .dumb_create = vc4_dumb_create,
109 .dumb_map_offset = drm_gem_cma_dumb_map_offset,
110 .dumb_destroy = drm_gem_dumb_destroy,
112 .ioctls = vc4_drm_ioctls,
113 .num_ioctls = ARRAY_SIZE(vc4_drm_ioctls),
114 .fops = &vc4_drm_fops,
119 .major = DRIVER_MAJOR,
120 .minor = DRIVER_MINOR,
121 .patchlevel = DRIVER_PATCHLEVEL,
124 static int compare_dev(struct device *dev, void *data)
129 static void vc4_match_add_drivers(struct device *dev,
130 struct component_match **match,
131 struct platform_driver *const *drivers,
136 for (i = 0; i < count; i++) {
137 struct device_driver *drv = &drivers[i]->driver;
138 struct device *p = NULL, *d;
140 while ((d = bus_find_device(&platform_bus_type, p, drv,
141 (void *)platform_bus_type.match))) {
143 component_match_add(dev, match, compare_dev, d);
150 static int vc4_drm_bind(struct device *dev)
152 struct platform_device *pdev = to_platform_device(dev);
153 struct drm_device *drm;
154 struct drm_connector *connector;
158 dev->coherent_dma_mask = DMA_BIT_MASK(32);
160 vc4 = devm_kzalloc(dev, sizeof(*vc4), GFP_KERNEL);
164 drm = drm_dev_alloc(&vc4_drm_driver, dev);
167 platform_set_drvdata(pdev, drm);
169 drm->dev_private = vc4;
171 drm_dev_set_unique(drm, dev_name(dev));
173 drm_mode_config_init(drm);
177 ret = component_bind_all(dev, drm);
181 ret = drm_dev_register(drm, 0);
185 /* Connector registration has to occur after DRM device
186 * registration, because it creates sysfs entries based on the
189 list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
190 ret = drm_connector_register(connector);
200 drm_dev_unregister(drm);
202 component_unbind_all(dev, drm);
208 static void vc4_drm_unbind(struct device *dev)
210 struct platform_device *pdev = to_platform_device(dev);
211 struct drm_device *drm = platform_get_drvdata(pdev);
212 struct vc4_dev *vc4 = to_vc4_dev(drm);
215 drm_fbdev_cma_fini(vc4->fbdev);
217 drm_mode_config_cleanup(drm);
222 static const struct component_master_ops vc4_drm_ops = {
223 .bind = vc4_drm_bind,
224 .unbind = vc4_drm_unbind,
227 static struct platform_driver *const component_drivers[] = {
233 static int vc4_platform_drm_probe(struct platform_device *pdev)
235 struct component_match *match = NULL;
236 struct device *dev = &pdev->dev;
238 vc4_match_add_drivers(dev, &match,
239 component_drivers, ARRAY_SIZE(component_drivers));
241 return component_master_add_with_match(dev, &vc4_drm_ops, match);
244 static int vc4_platform_drm_remove(struct platform_device *pdev)
246 component_master_del(&pdev->dev, &vc4_drm_ops);
251 static const struct of_device_id vc4_of_match[] = {
252 { .compatible = "brcm,bcm2835-vc4", },
255 MODULE_DEVICE_TABLE(of, vc4_of_match);
257 static struct platform_driver vc4_platform_driver = {
258 .probe = vc4_platform_drm_probe,
259 .remove = vc4_platform_drm_remove,
262 .of_match_table = vc4_of_match,
266 static int __init vc4_drm_register(void)
270 for (i = 0; i < ARRAY_SIZE(component_drivers); i++) {
271 ret = platform_driver_register(component_drivers[i]);
274 platform_driver_unregister(component_drivers[i]);
278 return platform_driver_register(&vc4_platform_driver);
281 static void __exit vc4_drm_unregister(void)
285 for (i = ARRAY_SIZE(component_drivers) - 1; i >= 0; i--)
286 platform_driver_unregister(component_drivers[i]);
288 platform_driver_unregister(&vc4_platform_driver);
291 module_init(vc4_drm_register);
292 module_exit(vc4_drm_unregister);
294 MODULE_ALIAS("platform:vc4-drm");
295 MODULE_DESCRIPTION("Broadcom VC4 DRM Driver");
296 MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
297 MODULE_LICENSE("GPL v2");