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"
19 #include "uapi/drm/vc4_drm.h"
23 #define DRIVER_NAME "vc4"
24 #define DRIVER_DESC "Broadcom VC4 graphics"
25 #define DRIVER_DATE "20140616"
26 #define DRIVER_MAJOR 0
27 #define DRIVER_MINOR 0
28 #define DRIVER_PATCHLEVEL 0
30 /* Helper function for mapping the regs on a platform device. */
31 void __iomem *vc4_ioremap_regs(struct platform_device *dev, int index)
36 res = platform_get_resource(dev, IORESOURCE_MEM, index);
37 map = devm_ioremap_resource(&dev->dev, res);
39 DRM_ERROR("Failed to map registers: %ld\n", PTR_ERR(map));
46 static void vc4_lastclose(struct drm_device *dev)
48 struct vc4_dev *vc4 = to_vc4_dev(dev);
51 drm_fbdev_cma_restore_mode(vc4->fbdev);
54 static const struct file_operations vc4_drm_fops = {
57 .release = drm_release,
58 .unlocked_ioctl = drm_ioctl,
63 .compat_ioctl = drm_compat_ioctl,
65 .llseek = noop_llseek,
68 static const struct drm_ioctl_desc vc4_drm_ioctls[] = {
69 DRM_IOCTL_DEF_DRV(VC4_SUBMIT_CL, vc4_submit_cl_ioctl, DRM_RENDER_ALLOW),
70 DRM_IOCTL_DEF_DRV(VC4_WAIT_SEQNO, vc4_wait_seqno_ioctl, DRM_RENDER_ALLOW),
71 DRM_IOCTL_DEF_DRV(VC4_WAIT_BO, vc4_wait_bo_ioctl, DRM_RENDER_ALLOW),
72 DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, DRM_RENDER_ALLOW),
73 DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, DRM_RENDER_ALLOW),
74 DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, DRM_RENDER_ALLOW),
75 DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl,
79 static struct drm_driver vc4_drm_driver = {
80 .driver_features = (DRIVER_MODESET |
86 .lastclose = vc4_lastclose,
87 .irq_handler = vc4_irq,
88 .irq_preinstall = vc4_irq_preinstall,
89 .irq_postinstall = vc4_irq_postinstall,
90 .irq_uninstall = vc4_irq_uninstall,
92 .enable_vblank = vc4_enable_vblank,
93 .disable_vblank = vc4_disable_vblank,
94 .get_vblank_counter = drm_vblank_no_hw_counter,
95 .get_scanout_position = vc4_crtc_get_scanoutpos,
96 .get_vblank_timestamp = vc4_crtc_get_vblank_timestamp,
98 #if defined(CONFIG_DEBUG_FS)
99 .debugfs_init = vc4_debugfs_init,
100 .debugfs_cleanup = vc4_debugfs_cleanup,
103 .gem_create_object = vc4_create_object,
104 .gem_free_object = vc4_free_object,
105 .gem_vm_ops = &drm_gem_cma_vm_ops,
107 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
108 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
109 .gem_prime_import = drm_gem_prime_import,
110 .gem_prime_export = vc4_prime_export,
111 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
112 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
113 .gem_prime_vmap = vc4_prime_vmap,
114 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
115 .gem_prime_mmap = vc4_prime_mmap,
117 .dumb_create = vc4_dumb_create,
118 .dumb_map_offset = drm_gem_cma_dumb_map_offset,
119 .dumb_destroy = drm_gem_dumb_destroy,
121 .ioctls = vc4_drm_ioctls,
122 .num_ioctls = ARRAY_SIZE(vc4_drm_ioctls),
123 .fops = &vc4_drm_fops,
128 .major = DRIVER_MAJOR,
129 .minor = DRIVER_MINOR,
130 .patchlevel = DRIVER_PATCHLEVEL,
133 static int compare_dev(struct device *dev, void *data)
138 static void vc4_match_add_drivers(struct device *dev,
139 struct component_match **match,
140 struct platform_driver *const *drivers,
145 for (i = 0; i < count; i++) {
146 struct device_driver *drv = &drivers[i]->driver;
147 struct device *p = NULL, *d;
149 while ((d = bus_find_device(&platform_bus_type, p, drv,
150 (void *)platform_bus_type.match))) {
152 component_match_add(dev, match, compare_dev, d);
159 static void vc4_kick_out_firmware_fb(void)
161 struct apertures_struct *ap;
163 ap = alloc_apertures(1);
167 /* Since VC4 is a UMA device, the simplefb node may have been
168 * located anywhere in memory.
170 ap->ranges[0].base = 0;
171 ap->ranges[0].size = ~0;
173 remove_conflicting_framebuffers(ap, "vc4drmfb", false);
177 static int vc4_drm_bind(struct device *dev)
179 struct platform_device *pdev = to_platform_device(dev);
180 struct drm_device *drm;
181 struct drm_connector *connector;
185 dev->coherent_dma_mask = DMA_BIT_MASK(32);
187 vc4 = devm_kzalloc(dev, sizeof(*vc4), GFP_KERNEL);
191 drm = drm_dev_alloc(&vc4_drm_driver, dev);
194 platform_set_drvdata(pdev, drm);
196 drm->dev_private = vc4;
198 vc4_bo_cache_init(drm);
200 drm_mode_config_init(drm);
206 ret = component_bind_all(dev, drm);
210 vc4_kick_out_firmware_fb();
212 ret = drm_dev_register(drm, 0);
216 /* Connector registration has to occur after DRM device
217 * registration, because it creates sysfs entries based on the
220 list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
221 ret = drm_connector_register(connector);
231 drm_dev_unregister(drm);
233 component_unbind_all(dev, drm);
235 vc4_gem_destroy(drm);
238 vc4_bo_cache_destroy(drm);
242 static void vc4_drm_unbind(struct device *dev)
244 struct platform_device *pdev = to_platform_device(dev);
245 struct drm_device *drm = platform_get_drvdata(pdev);
246 struct vc4_dev *vc4 = to_vc4_dev(drm);
249 drm_fbdev_cma_fini(vc4->fbdev);
251 drm_mode_config_cleanup(drm);
256 static const struct component_master_ops vc4_drm_ops = {
257 .bind = vc4_drm_bind,
258 .unbind = vc4_drm_unbind,
261 static struct platform_driver *const component_drivers[] = {
269 static int vc4_platform_drm_probe(struct platform_device *pdev)
271 struct component_match *match = NULL;
272 struct device *dev = &pdev->dev;
274 vc4_match_add_drivers(dev, &match,
275 component_drivers, ARRAY_SIZE(component_drivers));
277 return component_master_add_with_match(dev, &vc4_drm_ops, match);
280 static int vc4_platform_drm_remove(struct platform_device *pdev)
282 component_master_del(&pdev->dev, &vc4_drm_ops);
287 static const struct of_device_id vc4_of_match[] = {
288 { .compatible = "brcm,bcm2835-vc4", },
291 MODULE_DEVICE_TABLE(of, vc4_of_match);
293 static struct platform_driver vc4_platform_driver = {
294 .probe = vc4_platform_drm_probe,
295 .remove = vc4_platform_drm_remove,
298 .of_match_table = vc4_of_match,
302 static int __init vc4_drm_register(void)
306 for (i = 0; i < ARRAY_SIZE(component_drivers); i++) {
307 ret = platform_driver_register(component_drivers[i]);
310 platform_driver_unregister(component_drivers[i]);
314 return platform_driver_register(&vc4_platform_driver);
317 static void __exit vc4_drm_unregister(void)
321 for (i = ARRAY_SIZE(component_drivers) - 1; i >= 0; i--)
322 platform_driver_unregister(component_drivers[i]);
324 platform_driver_unregister(&vc4_platform_driver);
327 module_init(vc4_drm_register);
328 module_exit(vc4_drm_unregister);
330 MODULE_ALIAS("platform:vc4-drm");
331 MODULE_DESCRIPTION("Broadcom VC4 DRM Driver");
332 MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
333 MODULE_LICENSE("GPL v2");