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 <linux/pm_runtime.h>
18 #include "drm_fb_cma_helper.h"
19 #include <drm/drm_fb_helper.h>
21 #include "uapi/drm/vc4_drm.h"
25 #define DRIVER_NAME "vc4"
26 #define DRIVER_DESC "Broadcom VC4 graphics"
27 #define DRIVER_DATE "20140616"
28 #define DRIVER_MAJOR 0
29 #define DRIVER_MINOR 0
30 #define DRIVER_PATCHLEVEL 0
32 /* Helper function for mapping the regs on a platform device. */
33 void __iomem *vc4_ioremap_regs(struct platform_device *dev, int index)
38 res = platform_get_resource(dev, IORESOURCE_MEM, index);
39 map = devm_ioremap_resource(&dev->dev, res);
41 DRM_ERROR("Failed to map registers: %ld\n", PTR_ERR(map));
48 static int vc4_get_param_ioctl(struct drm_device *dev, void *data,
49 struct drm_file *file_priv)
51 struct vc4_dev *vc4 = to_vc4_dev(dev);
52 struct drm_vc4_get_param *args = data;
58 switch (args->param) {
59 case DRM_VC4_PARAM_V3D_IDENT0:
60 ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
63 args->value = V3D_READ(V3D_IDENT0);
64 pm_runtime_put(&vc4->v3d->pdev->dev);
66 case DRM_VC4_PARAM_V3D_IDENT1:
67 ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
70 args->value = V3D_READ(V3D_IDENT1);
71 pm_runtime_put(&vc4->v3d->pdev->dev);
73 case DRM_VC4_PARAM_V3D_IDENT2:
74 ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
77 args->value = V3D_READ(V3D_IDENT2);
78 pm_runtime_put(&vc4->v3d->pdev->dev);
80 case DRM_VC4_PARAM_SUPPORTS_BRANCHES:
81 case DRM_VC4_PARAM_SUPPORTS_ETC1:
85 DRM_DEBUG("Unknown parameter %d\n", args->param);
92 static void vc4_lastclose(struct drm_device *dev)
94 struct vc4_dev *vc4 = to_vc4_dev(dev);
96 drm_fbdev_cma_restore_mode(vc4->fbdev);
99 static const struct file_operations vc4_drm_fops = {
100 .owner = THIS_MODULE,
102 .release = drm_release,
103 .unlocked_ioctl = drm_ioctl,
108 .compat_ioctl = drm_compat_ioctl,
110 .llseek = noop_llseek,
113 static const struct drm_ioctl_desc vc4_drm_ioctls[] = {
114 DRM_IOCTL_DEF_DRV(VC4_SUBMIT_CL, vc4_submit_cl_ioctl, DRM_RENDER_ALLOW),
115 DRM_IOCTL_DEF_DRV(VC4_WAIT_SEQNO, vc4_wait_seqno_ioctl, DRM_RENDER_ALLOW),
116 DRM_IOCTL_DEF_DRV(VC4_WAIT_BO, vc4_wait_bo_ioctl, DRM_RENDER_ALLOW),
117 DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, DRM_RENDER_ALLOW),
118 DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, DRM_RENDER_ALLOW),
119 DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, DRM_RENDER_ALLOW),
120 DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl,
122 DRM_IOCTL_DEF_DRV(VC4_GET_PARAM, vc4_get_param_ioctl, DRM_RENDER_ALLOW),
125 static struct drm_driver vc4_drm_driver = {
126 .driver_features = (DRIVER_MODESET |
132 .lastclose = vc4_lastclose,
133 .irq_handler = vc4_irq,
134 .irq_preinstall = vc4_irq_preinstall,
135 .irq_postinstall = vc4_irq_postinstall,
136 .irq_uninstall = vc4_irq_uninstall,
138 .enable_vblank = vc4_enable_vblank,
139 .disable_vblank = vc4_disable_vblank,
140 .get_vblank_counter = drm_vblank_no_hw_counter,
141 .get_scanout_position = vc4_crtc_get_scanoutpos,
142 .get_vblank_timestamp = vc4_crtc_get_vblank_timestamp,
144 #if defined(CONFIG_DEBUG_FS)
145 .debugfs_init = vc4_debugfs_init,
146 .debugfs_cleanup = vc4_debugfs_cleanup,
149 .gem_create_object = vc4_create_object,
150 .gem_free_object_unlocked = vc4_free_object,
151 .gem_vm_ops = &drm_gem_cma_vm_ops,
153 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
154 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
155 .gem_prime_import = drm_gem_prime_import,
156 .gem_prime_export = vc4_prime_export,
157 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
158 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
159 .gem_prime_vmap = vc4_prime_vmap,
160 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
161 .gem_prime_mmap = vc4_prime_mmap,
163 .dumb_create = vc4_dumb_create,
164 .dumb_map_offset = drm_gem_cma_dumb_map_offset,
165 .dumb_destroy = drm_gem_dumb_destroy,
167 .ioctls = vc4_drm_ioctls,
168 .num_ioctls = ARRAY_SIZE(vc4_drm_ioctls),
169 .fops = &vc4_drm_fops,
174 .major = DRIVER_MAJOR,
175 .minor = DRIVER_MINOR,
176 .patchlevel = DRIVER_PATCHLEVEL,
179 static int compare_dev(struct device *dev, void *data)
184 static void vc4_match_add_drivers(struct device *dev,
185 struct component_match **match,
186 struct platform_driver *const *drivers,
191 for (i = 0; i < count; i++) {
192 struct device_driver *drv = &drivers[i]->driver;
193 struct device *p = NULL, *d;
195 while ((d = bus_find_device(&platform_bus_type, p, drv,
196 (void *)platform_bus_type.match))) {
198 component_match_add(dev, match, compare_dev, d);
205 static void vc4_kick_out_firmware_fb(void)
207 struct apertures_struct *ap;
209 ap = alloc_apertures(1);
213 /* Since VC4 is a UMA device, the simplefb node may have been
214 * located anywhere in memory.
216 ap->ranges[0].base = 0;
217 ap->ranges[0].size = ~0;
219 drm_fb_helper_remove_conflicting_framebuffers(ap, "vc4drmfb", false);
223 static int vc4_drm_bind(struct device *dev)
225 struct platform_device *pdev = to_platform_device(dev);
226 struct drm_device *drm;
230 dev->coherent_dma_mask = DMA_BIT_MASK(32);
232 vc4 = devm_kzalloc(dev, sizeof(*vc4), GFP_KERNEL);
236 drm = drm_dev_alloc(&vc4_drm_driver, dev);
239 platform_set_drvdata(pdev, drm);
241 drm->dev_private = vc4;
243 vc4_bo_cache_init(drm);
245 drm_mode_config_init(drm);
249 ret = component_bind_all(dev, drm);
253 vc4_kick_out_firmware_fb();
255 ret = drm_dev_register(drm, 0);
264 component_unbind_all(dev, drm);
266 vc4_gem_destroy(drm);
268 vc4_bo_cache_destroy(drm);
272 static void vc4_drm_unbind(struct device *dev)
274 struct platform_device *pdev = to_platform_device(dev);
275 struct drm_device *drm = platform_get_drvdata(pdev);
276 struct vc4_dev *vc4 = to_vc4_dev(drm);
279 drm_fbdev_cma_fini(vc4->fbdev);
281 drm_mode_config_cleanup(drm);
286 static const struct component_master_ops vc4_drm_ops = {
287 .bind = vc4_drm_bind,
288 .unbind = vc4_drm_unbind,
291 static struct platform_driver *const component_drivers[] = {
299 static int vc4_platform_drm_probe(struct platform_device *pdev)
301 struct component_match *match = NULL;
302 struct device *dev = &pdev->dev;
304 vc4_match_add_drivers(dev, &match,
305 component_drivers, ARRAY_SIZE(component_drivers));
307 return component_master_add_with_match(dev, &vc4_drm_ops, match);
310 static int vc4_platform_drm_remove(struct platform_device *pdev)
312 component_master_del(&pdev->dev, &vc4_drm_ops);
317 static const struct of_device_id vc4_of_match[] = {
318 { .compatible = "brcm,bcm2835-vc4", },
321 MODULE_DEVICE_TABLE(of, vc4_of_match);
323 static struct platform_driver vc4_platform_driver = {
324 .probe = vc4_platform_drm_probe,
325 .remove = vc4_platform_drm_remove,
328 .of_match_table = vc4_of_match,
332 static int __init vc4_drm_register(void)
336 for (i = 0; i < ARRAY_SIZE(component_drivers); i++) {
337 ret = platform_driver_register(component_drivers[i]);
340 platform_driver_unregister(component_drivers[i]);
344 return platform_driver_register(&vc4_platform_driver);
347 static void __exit vc4_drm_unregister(void)
351 for (i = ARRAY_SIZE(component_drivers) - 1; i >= 0; i--)
352 platform_driver_unregister(component_drivers[i]);
354 platform_driver_unregister(&vc4_platform_driver);
357 module_init(vc4_drm_register);
358 module_exit(vc4_drm_unregister);
360 MODULE_ALIAS("platform:vc4-drm");
361 MODULE_DESCRIPTION("Broadcom VC4 DRM Driver");
362 MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
363 MODULE_LICENSE("GPL v2");