1 /* 2 * Copyright (C) 2012 Russell King 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 */ 8 #include <linux/clk.h> 9 #include <linux/module.h> 10 #include <drm/drmP.h> 11 #include <drm/drm_crtc_helper.h> 12 #include "armada_crtc.h" 13 #include "armada_drm.h" 14 #include "armada_gem.h" 15 #include "armada_hw.h" 16 #include <drm/armada_drm.h> 17 #include "armada_ioctlP.h" 18 19 #ifdef CONFIG_DRM_ARMADA_TDA1998X 20 #include <drm/i2c/tda998x.h> 21 #include "armada_slave.h" 22 23 static struct tda998x_encoder_params params = { 24 /* With 0x24, there is no translation between vp_out and int_vp 25 FB LCD out Pins VIP Int Vp 26 R:23:16 R:7:0 VPC7:0 7:0 7:0[R] 27 G:15:8 G:15:8 VPB7:0 23:16 23:16[G] 28 B:7:0 B:23:16 VPA7:0 15:8 15:8[B] 29 */ 30 .swap_a = 2, 31 .swap_b = 3, 32 .swap_c = 4, 33 .swap_d = 5, 34 .swap_e = 0, 35 .swap_f = 1, 36 .audio_cfg = BIT(2), 37 .audio_frame[1] = 1, 38 .audio_format = AFMT_SPDIF, 39 .audio_sample_rate = 44100, 40 }; 41 42 static const struct armada_drm_slave_config tda19988_config = { 43 .i2c_adapter_id = 0, 44 .crtcs = 1 << 0, /* Only LCD0 at the moment */ 45 .polled = DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT, 46 .interlace_allowed = true, 47 .info = { 48 .type = "tda998x", 49 .addr = 0x70, 50 .platform_data = ¶ms, 51 }, 52 }; 53 #endif 54 55 static void armada_drm_unref_work(struct work_struct *work) 56 { 57 struct armada_private *priv = 58 container_of(work, struct armada_private, fb_unref_work); 59 struct drm_framebuffer *fb; 60 61 while (kfifo_get(&priv->fb_unref, &fb)) 62 drm_framebuffer_unreference(fb); 63 } 64 65 /* Must be called with dev->event_lock held */ 66 void __armada_drm_queue_unref_work(struct drm_device *dev, 67 struct drm_framebuffer *fb) 68 { 69 struct armada_private *priv = dev->dev_private; 70 71 WARN_ON(!kfifo_put(&priv->fb_unref, fb)); 72 schedule_work(&priv->fb_unref_work); 73 } 74 75 void armada_drm_queue_unref_work(struct drm_device *dev, 76 struct drm_framebuffer *fb) 77 { 78 unsigned long flags; 79 80 spin_lock_irqsave(&dev->event_lock, flags); 81 __armada_drm_queue_unref_work(dev, fb); 82 spin_unlock_irqrestore(&dev->event_lock, flags); 83 } 84 85 static int armada_drm_load(struct drm_device *dev, unsigned long flags) 86 { 87 const struct platform_device_id *id; 88 struct armada_private *priv; 89 struct resource *res[ARRAY_SIZE(priv->dcrtc)]; 90 struct resource *mem = NULL; 91 int ret, n, i; 92 93 memset(res, 0, sizeof(res)); 94 95 for (n = i = 0; ; n++) { 96 struct resource *r = platform_get_resource(dev->platformdev, 97 IORESOURCE_MEM, n); 98 if (!r) 99 break; 100 101 /* Resources above 64K are graphics memory */ 102 if (resource_size(r) > SZ_64K) 103 mem = r; 104 else if (i < ARRAY_SIZE(priv->dcrtc)) 105 res[i++] = r; 106 else 107 return -EINVAL; 108 } 109 110 if (!res[0] || !mem) 111 return -ENXIO; 112 113 if (!devm_request_mem_region(dev->dev, mem->start, 114 resource_size(mem), "armada-drm")) 115 return -EBUSY; 116 117 priv = devm_kzalloc(dev->dev, sizeof(*priv), GFP_KERNEL); 118 if (!priv) { 119 DRM_ERROR("failed to allocate private\n"); 120 return -ENOMEM; 121 } 122 123 platform_set_drvdata(dev->platformdev, dev); 124 dev->dev_private = priv; 125 126 /* Get the implementation specific driver data. */ 127 id = platform_get_device_id(dev->platformdev); 128 if (!id) 129 return -ENXIO; 130 131 priv->variant = (struct armada_variant *)id->driver_data; 132 133 ret = priv->variant->init(priv, dev->dev); 134 if (ret) 135 return ret; 136 137 INIT_WORK(&priv->fb_unref_work, armada_drm_unref_work); 138 INIT_KFIFO(priv->fb_unref); 139 140 /* Mode setting support */ 141 drm_mode_config_init(dev); 142 dev->mode_config.min_width = 320; 143 dev->mode_config.min_height = 200; 144 145 /* 146 * With vscale enabled, the maximum width is 1920 due to the 147 * 1920 by 3 lines RAM 148 */ 149 dev->mode_config.max_width = 1920; 150 dev->mode_config.max_height = 2048; 151 152 dev->mode_config.preferred_depth = 24; 153 dev->mode_config.funcs = &armada_drm_mode_config_funcs; 154 drm_mm_init(&priv->linear, mem->start, resource_size(mem)); 155 156 /* Create all LCD controllers */ 157 for (n = 0; n < ARRAY_SIZE(priv->dcrtc); n++) { 158 if (!res[n]) 159 break; 160 161 ret = armada_drm_crtc_create(dev, n, res[n]); 162 if (ret) 163 goto err_kms; 164 } 165 166 #ifdef CONFIG_DRM_ARMADA_TDA1998X 167 ret = armada_drm_connector_slave_create(dev, &tda19988_config); 168 if (ret) 169 goto err_kms; 170 #endif 171 172 ret = drm_vblank_init(dev, n); 173 if (ret) 174 goto err_kms; 175 176 ret = drm_irq_install(dev, platform_get_irq(dev->platformdev, 0)); 177 if (ret) 178 goto err_kms; 179 180 dev->vblank_disable_allowed = 1; 181 182 ret = armada_fbdev_init(dev); 183 if (ret) 184 goto err_irq; 185 186 drm_kms_helper_poll_init(dev); 187 188 return 0; 189 190 err_irq: 191 drm_irq_uninstall(dev); 192 err_kms: 193 drm_mode_config_cleanup(dev); 194 drm_mm_takedown(&priv->linear); 195 flush_work(&priv->fb_unref_work); 196 197 return ret; 198 } 199 200 static int armada_drm_unload(struct drm_device *dev) 201 { 202 struct armada_private *priv = dev->dev_private; 203 204 drm_kms_helper_poll_fini(dev); 205 armada_fbdev_fini(dev); 206 drm_irq_uninstall(dev); 207 drm_mode_config_cleanup(dev); 208 drm_mm_takedown(&priv->linear); 209 flush_work(&priv->fb_unref_work); 210 dev->dev_private = NULL; 211 212 return 0; 213 } 214 215 void armada_drm_vbl_event_add(struct armada_crtc *dcrtc, 216 struct armada_vbl_event *evt) 217 { 218 unsigned long flags; 219 220 spin_lock_irqsave(&dcrtc->irq_lock, flags); 221 if (list_empty(&evt->node)) { 222 list_add_tail(&evt->node, &dcrtc->vbl_list); 223 224 drm_vblank_get(dcrtc->crtc.dev, dcrtc->num); 225 } 226 spin_unlock_irqrestore(&dcrtc->irq_lock, flags); 227 } 228 229 void armada_drm_vbl_event_remove(struct armada_crtc *dcrtc, 230 struct armada_vbl_event *evt) 231 { 232 if (!list_empty(&evt->node)) { 233 list_del_init(&evt->node); 234 drm_vblank_put(dcrtc->crtc.dev, dcrtc->num); 235 } 236 } 237 238 void armada_drm_vbl_event_remove_unlocked(struct armada_crtc *dcrtc, 239 struct armada_vbl_event *evt) 240 { 241 unsigned long flags; 242 243 spin_lock_irqsave(&dcrtc->irq_lock, flags); 244 armada_drm_vbl_event_remove(dcrtc, evt); 245 spin_unlock_irqrestore(&dcrtc->irq_lock, flags); 246 } 247 248 /* These are called under the vbl_lock. */ 249 static int armada_drm_enable_vblank(struct drm_device *dev, int crtc) 250 { 251 struct armada_private *priv = dev->dev_private; 252 armada_drm_crtc_enable_irq(priv->dcrtc[crtc], VSYNC_IRQ_ENA); 253 return 0; 254 } 255 256 static void armada_drm_disable_vblank(struct drm_device *dev, int crtc) 257 { 258 struct armada_private *priv = dev->dev_private; 259 armada_drm_crtc_disable_irq(priv->dcrtc[crtc], VSYNC_IRQ_ENA); 260 } 261 262 static irqreturn_t armada_drm_irq_handler(int irq, void *arg) 263 { 264 struct drm_device *dev = arg; 265 struct armada_private *priv = dev->dev_private; 266 struct armada_crtc *dcrtc = priv->dcrtc[0]; 267 uint32_t v, stat = readl_relaxed(dcrtc->base + LCD_SPU_IRQ_ISR); 268 irqreturn_t handled = IRQ_NONE; 269 270 /* 271 * This is rediculous - rather than writing bits to clear, we 272 * have to set the actual status register value. This is racy. 273 */ 274 writel_relaxed(0, dcrtc->base + LCD_SPU_IRQ_ISR); 275 276 /* Mask out those interrupts we haven't enabled */ 277 v = stat & dcrtc->irq_ena; 278 279 if (v & (VSYNC_IRQ|GRA_FRAME_IRQ|DUMB_FRAMEDONE)) { 280 armada_drm_crtc_irq(dcrtc, stat); 281 handled = IRQ_HANDLED; 282 } 283 284 return handled; 285 } 286 287 static int armada_drm_irq_postinstall(struct drm_device *dev) 288 { 289 struct armada_private *priv = dev->dev_private; 290 struct armada_crtc *dcrtc = priv->dcrtc[0]; 291 292 spin_lock_irq(&dev->vbl_lock); 293 writel_relaxed(dcrtc->irq_ena, dcrtc->base + LCD_SPU_IRQ_ENA); 294 writel(0, dcrtc->base + LCD_SPU_IRQ_ISR); 295 spin_unlock_irq(&dev->vbl_lock); 296 297 return 0; 298 } 299 300 static void armada_drm_irq_uninstall(struct drm_device *dev) 301 { 302 struct armada_private *priv = dev->dev_private; 303 struct armada_crtc *dcrtc = priv->dcrtc[0]; 304 305 writel(0, dcrtc->base + LCD_SPU_IRQ_ENA); 306 } 307 308 static struct drm_ioctl_desc armada_ioctls[] = { 309 DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl, 310 DRM_UNLOCKED), 311 DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl, 312 DRM_UNLOCKED), 313 DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl, 314 DRM_UNLOCKED), 315 }; 316 317 static void armada_drm_lastclose(struct drm_device *dev) 318 { 319 armada_fbdev_lastclose(dev); 320 } 321 322 static const struct file_operations armada_drm_fops = { 323 .owner = THIS_MODULE, 324 .llseek = no_llseek, 325 .read = drm_read, 326 .poll = drm_poll, 327 .unlocked_ioctl = drm_ioctl, 328 .mmap = drm_gem_mmap, 329 .open = drm_open, 330 .release = drm_release, 331 }; 332 333 static struct drm_driver armada_drm_driver = { 334 .load = armada_drm_load, 335 .open = NULL, 336 .preclose = NULL, 337 .postclose = NULL, 338 .lastclose = armada_drm_lastclose, 339 .unload = armada_drm_unload, 340 .get_vblank_counter = drm_vblank_count, 341 .enable_vblank = armada_drm_enable_vblank, 342 .disable_vblank = armada_drm_disable_vblank, 343 .irq_handler = armada_drm_irq_handler, 344 .irq_postinstall = armada_drm_irq_postinstall, 345 .irq_uninstall = armada_drm_irq_uninstall, 346 #ifdef CONFIG_DEBUG_FS 347 .debugfs_init = armada_drm_debugfs_init, 348 .debugfs_cleanup = armada_drm_debugfs_cleanup, 349 #endif 350 .gem_free_object = armada_gem_free_object, 351 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, 352 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, 353 .gem_prime_export = armada_gem_prime_export, 354 .gem_prime_import = armada_gem_prime_import, 355 .dumb_create = armada_gem_dumb_create, 356 .dumb_map_offset = armada_gem_dumb_map_offset, 357 .dumb_destroy = armada_gem_dumb_destroy, 358 .gem_vm_ops = &armada_gem_vm_ops, 359 .major = 1, 360 .minor = 0, 361 .name = "armada-drm", 362 .desc = "Armada SoC DRM", 363 .date = "20120730", 364 .driver_features = DRIVER_GEM | DRIVER_MODESET | 365 DRIVER_HAVE_IRQ | DRIVER_PRIME, 366 .ioctls = armada_ioctls, 367 .fops = &armada_drm_fops, 368 }; 369 370 static int armada_drm_probe(struct platform_device *pdev) 371 { 372 return drm_platform_init(&armada_drm_driver, pdev); 373 } 374 375 static int armada_drm_remove(struct platform_device *pdev) 376 { 377 drm_put_dev(platform_get_drvdata(pdev)); 378 return 0; 379 } 380 381 static const struct platform_device_id armada_drm_platform_ids[] = { 382 { 383 .name = "armada-drm", 384 .driver_data = (unsigned long)&armada510_ops, 385 }, { 386 .name = "armada-510-drm", 387 .driver_data = (unsigned long)&armada510_ops, 388 }, 389 { }, 390 }; 391 MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids); 392 393 static struct platform_driver armada_drm_platform_driver = { 394 .probe = armada_drm_probe, 395 .remove = armada_drm_remove, 396 .driver = { 397 .name = "armada-drm", 398 .owner = THIS_MODULE, 399 }, 400 .id_table = armada_drm_platform_ids, 401 }; 402 403 static int __init armada_drm_init(void) 404 { 405 armada_drm_driver.num_ioctls = ARRAY_SIZE(armada_ioctls); 406 return platform_driver_register(&armada_drm_platform_driver); 407 } 408 module_init(armada_drm_init); 409 410 static void __exit armada_drm_exit(void) 411 { 412 platform_driver_unregister(&armada_drm_platform_driver); 413 } 414 module_exit(armada_drm_exit); 415 416 MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>"); 417 MODULE_DESCRIPTION("Armada DRM Driver"); 418 MODULE_LICENSE("GPL"); 419 MODULE_ALIAS("platform:armada-drm"); 420