1 /* 2 * Copyright (C) 2014-2015 Broadcom 3 * Copyright (C) 2013 Red Hat 4 * 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. 8 */ 9 10 #include <linux/clk.h> 11 #include <linux/component.h> 12 #include <linux/device.h> 13 #include <linux/io.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> 20 21 #include "uapi/drm/vc4_drm.h" 22 #include "vc4_drv.h" 23 #include "vc4_regs.h" 24 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 31 32 /* Helper function for mapping the regs on a platform device. */ 33 void __iomem *vc4_ioremap_regs(struct platform_device *dev, int index) 34 { 35 struct resource *res; 36 void __iomem *map; 37 38 res = platform_get_resource(dev, IORESOURCE_MEM, index); 39 map = devm_ioremap_resource(&dev->dev, res); 40 if (IS_ERR(map)) { 41 DRM_ERROR("Failed to map registers: %ld\n", PTR_ERR(map)); 42 return map; 43 } 44 45 return map; 46 } 47 48 static int vc4_get_param_ioctl(struct drm_device *dev, void *data, 49 struct drm_file *file_priv) 50 { 51 struct vc4_dev *vc4 = to_vc4_dev(dev); 52 struct drm_vc4_get_param *args = data; 53 int ret; 54 55 if (args->pad != 0) 56 return -EINVAL; 57 58 switch (args->param) { 59 case DRM_VC4_PARAM_V3D_IDENT0: 60 ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev); 61 if (ret < 0) 62 return ret; 63 args->value = V3D_READ(V3D_IDENT0); 64 pm_runtime_mark_last_busy(&vc4->v3d->pdev->dev); 65 pm_runtime_put_autosuspend(&vc4->v3d->pdev->dev); 66 break; 67 case DRM_VC4_PARAM_V3D_IDENT1: 68 ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev); 69 if (ret < 0) 70 return ret; 71 args->value = V3D_READ(V3D_IDENT1); 72 pm_runtime_mark_last_busy(&vc4->v3d->pdev->dev); 73 pm_runtime_put_autosuspend(&vc4->v3d->pdev->dev); 74 break; 75 case DRM_VC4_PARAM_V3D_IDENT2: 76 ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev); 77 if (ret < 0) 78 return ret; 79 args->value = V3D_READ(V3D_IDENT2); 80 pm_runtime_mark_last_busy(&vc4->v3d->pdev->dev); 81 pm_runtime_put_autosuspend(&vc4->v3d->pdev->dev); 82 break; 83 case DRM_VC4_PARAM_SUPPORTS_BRANCHES: 84 case DRM_VC4_PARAM_SUPPORTS_ETC1: 85 case DRM_VC4_PARAM_SUPPORTS_THREADED_FS: 86 args->value = true; 87 break; 88 default: 89 DRM_DEBUG("Unknown parameter %d\n", args->param); 90 return -EINVAL; 91 } 92 93 return 0; 94 } 95 96 static void vc4_lastclose(struct drm_device *dev) 97 { 98 struct vc4_dev *vc4 = to_vc4_dev(dev); 99 100 drm_fbdev_cma_restore_mode(vc4->fbdev); 101 } 102 103 static const struct file_operations vc4_drm_fops = { 104 .owner = THIS_MODULE, 105 .open = drm_open, 106 .release = drm_release, 107 .unlocked_ioctl = drm_ioctl, 108 .mmap = vc4_mmap, 109 .poll = drm_poll, 110 .read = drm_read, 111 .compat_ioctl = drm_compat_ioctl, 112 .llseek = noop_llseek, 113 }; 114 115 static const struct drm_ioctl_desc vc4_drm_ioctls[] = { 116 DRM_IOCTL_DEF_DRV(VC4_SUBMIT_CL, vc4_submit_cl_ioctl, DRM_RENDER_ALLOW), 117 DRM_IOCTL_DEF_DRV(VC4_WAIT_SEQNO, vc4_wait_seqno_ioctl, DRM_RENDER_ALLOW), 118 DRM_IOCTL_DEF_DRV(VC4_WAIT_BO, vc4_wait_bo_ioctl, DRM_RENDER_ALLOW), 119 DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, DRM_RENDER_ALLOW), 120 DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, DRM_RENDER_ALLOW), 121 DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, DRM_RENDER_ALLOW), 122 DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl, 123 DRM_ROOT_ONLY), 124 DRM_IOCTL_DEF_DRV(VC4_GET_PARAM, vc4_get_param_ioctl, DRM_RENDER_ALLOW), 125 }; 126 127 static struct drm_driver vc4_drm_driver = { 128 .driver_features = (DRIVER_MODESET | 129 DRIVER_ATOMIC | 130 DRIVER_GEM | 131 DRIVER_HAVE_IRQ | 132 DRIVER_RENDER | 133 DRIVER_PRIME), 134 .lastclose = vc4_lastclose, 135 .irq_handler = vc4_irq, 136 .irq_preinstall = vc4_irq_preinstall, 137 .irq_postinstall = vc4_irq_postinstall, 138 .irq_uninstall = vc4_irq_uninstall, 139 140 .enable_vblank = vc4_enable_vblank, 141 .disable_vblank = vc4_disable_vblank, 142 .get_vblank_counter = drm_vblank_no_hw_counter, 143 .get_scanout_position = vc4_crtc_get_scanoutpos, 144 .get_vblank_timestamp = vc4_crtc_get_vblank_timestamp, 145 146 #if defined(CONFIG_DEBUG_FS) 147 .debugfs_init = vc4_debugfs_init, 148 .debugfs_cleanup = vc4_debugfs_cleanup, 149 #endif 150 151 .gem_create_object = vc4_create_object, 152 .gem_free_object_unlocked = vc4_free_object, 153 .gem_vm_ops = &drm_gem_cma_vm_ops, 154 155 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, 156 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, 157 .gem_prime_import = drm_gem_prime_import, 158 .gem_prime_export = vc4_prime_export, 159 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table, 160 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table, 161 .gem_prime_vmap = vc4_prime_vmap, 162 .gem_prime_vunmap = drm_gem_cma_prime_vunmap, 163 .gem_prime_mmap = vc4_prime_mmap, 164 165 .dumb_create = vc4_dumb_create, 166 .dumb_map_offset = drm_gem_cma_dumb_map_offset, 167 .dumb_destroy = drm_gem_dumb_destroy, 168 169 .ioctls = vc4_drm_ioctls, 170 .num_ioctls = ARRAY_SIZE(vc4_drm_ioctls), 171 .fops = &vc4_drm_fops, 172 173 .name = DRIVER_NAME, 174 .desc = DRIVER_DESC, 175 .date = DRIVER_DATE, 176 .major = DRIVER_MAJOR, 177 .minor = DRIVER_MINOR, 178 .patchlevel = DRIVER_PATCHLEVEL, 179 }; 180 181 static int compare_dev(struct device *dev, void *data) 182 { 183 return dev == data; 184 } 185 186 static void vc4_match_add_drivers(struct device *dev, 187 struct component_match **match, 188 struct platform_driver *const *drivers, 189 int count) 190 { 191 int i; 192 193 for (i = 0; i < count; i++) { 194 struct device_driver *drv = &drivers[i]->driver; 195 struct device *p = NULL, *d; 196 197 while ((d = bus_find_device(&platform_bus_type, p, drv, 198 (void *)platform_bus_type.match))) { 199 put_device(p); 200 component_match_add(dev, match, compare_dev, d); 201 p = d; 202 } 203 put_device(p); 204 } 205 } 206 207 static void vc4_kick_out_firmware_fb(void) 208 { 209 struct apertures_struct *ap; 210 211 ap = alloc_apertures(1); 212 if (!ap) 213 return; 214 215 /* Since VC4 is a UMA device, the simplefb node may have been 216 * located anywhere in memory. 217 */ 218 ap->ranges[0].base = 0; 219 ap->ranges[0].size = ~0; 220 221 drm_fb_helper_remove_conflicting_framebuffers(ap, "vc4drmfb", false); 222 kfree(ap); 223 } 224 225 static int vc4_drm_bind(struct device *dev) 226 { 227 struct platform_device *pdev = to_platform_device(dev); 228 struct drm_device *drm; 229 struct vc4_dev *vc4; 230 int ret = 0; 231 232 dev->coherent_dma_mask = DMA_BIT_MASK(32); 233 234 vc4 = devm_kzalloc(dev, sizeof(*vc4), GFP_KERNEL); 235 if (!vc4) 236 return -ENOMEM; 237 238 drm = drm_dev_alloc(&vc4_drm_driver, dev); 239 if (IS_ERR(drm)) 240 return PTR_ERR(drm); 241 platform_set_drvdata(pdev, drm); 242 vc4->dev = drm; 243 drm->dev_private = vc4; 244 245 vc4_bo_cache_init(drm); 246 247 drm_mode_config_init(drm); 248 249 vc4_gem_init(drm); 250 251 ret = component_bind_all(dev, drm); 252 if (ret) 253 goto gem_destroy; 254 255 vc4_kick_out_firmware_fb(); 256 257 ret = drm_dev_register(drm, 0); 258 if (ret < 0) 259 goto unbind_all; 260 261 vc4_kms_load(drm); 262 263 return 0; 264 265 unbind_all: 266 component_unbind_all(dev, drm); 267 gem_destroy: 268 vc4_gem_destroy(drm); 269 drm_dev_unref(drm); 270 vc4_bo_cache_destroy(drm); 271 return ret; 272 } 273 274 static void vc4_drm_unbind(struct device *dev) 275 { 276 struct platform_device *pdev = to_platform_device(dev); 277 struct drm_device *drm = platform_get_drvdata(pdev); 278 struct vc4_dev *vc4 = to_vc4_dev(drm); 279 280 drm_dev_unregister(drm); 281 282 if (vc4->fbdev) 283 drm_fbdev_cma_fini(vc4->fbdev); 284 285 drm_mode_config_cleanup(drm); 286 287 drm_dev_unref(drm); 288 } 289 290 static const struct component_master_ops vc4_drm_ops = { 291 .bind = vc4_drm_bind, 292 .unbind = vc4_drm_unbind, 293 }; 294 295 static struct platform_driver *const component_drivers[] = { 296 &vc4_hdmi_driver, 297 &vc4_vec_driver, 298 &vc4_dpi_driver, 299 &vc4_hvs_driver, 300 &vc4_crtc_driver, 301 &vc4_v3d_driver, 302 }; 303 304 static int vc4_platform_drm_probe(struct platform_device *pdev) 305 { 306 struct component_match *match = NULL; 307 struct device *dev = &pdev->dev; 308 309 vc4_match_add_drivers(dev, &match, 310 component_drivers, ARRAY_SIZE(component_drivers)); 311 312 return component_master_add_with_match(dev, &vc4_drm_ops, match); 313 } 314 315 static int vc4_platform_drm_remove(struct platform_device *pdev) 316 { 317 component_master_del(&pdev->dev, &vc4_drm_ops); 318 319 return 0; 320 } 321 322 static const struct of_device_id vc4_of_match[] = { 323 { .compatible = "brcm,bcm2835-vc4", }, 324 {}, 325 }; 326 MODULE_DEVICE_TABLE(of, vc4_of_match); 327 328 static struct platform_driver vc4_platform_driver = { 329 .probe = vc4_platform_drm_probe, 330 .remove = vc4_platform_drm_remove, 331 .driver = { 332 .name = "vc4-drm", 333 .of_match_table = vc4_of_match, 334 }, 335 }; 336 337 static int __init vc4_drm_register(void) 338 { 339 int i, ret; 340 341 for (i = 0; i < ARRAY_SIZE(component_drivers); i++) { 342 ret = platform_driver_register(component_drivers[i]); 343 if (ret) { 344 while (--i >= 0) 345 platform_driver_unregister(component_drivers[i]); 346 return ret; 347 } 348 } 349 return platform_driver_register(&vc4_platform_driver); 350 } 351 352 static void __exit vc4_drm_unregister(void) 353 { 354 int i; 355 356 for (i = ARRAY_SIZE(component_drivers) - 1; i >= 0; i--) 357 platform_driver_unregister(component_drivers[i]); 358 359 platform_driver_unregister(&vc4_platform_driver); 360 } 361 362 module_init(vc4_drm_register); 363 module_exit(vc4_drm_unregister); 364 365 MODULE_ALIAS("platform:vc4-drm"); 366 MODULE_DESCRIPTION("Broadcom VC4 DRM Driver"); 367 MODULE_AUTHOR("Eric Anholt <eric@anholt.net>"); 368 MODULE_LICENSE("GPL v2"); 369