1 /* 2 * Copyright (C) 2016 BayLibre, SAS 3 * Author: Neil Armstrong <narmstrong@baylibre.com> 4 * Copyright (C) 2014 Endless Mobile 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License as 8 * published by the Free Software Foundation; either version 2 of the 9 * License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, but 12 * WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, see <http://www.gnu.org/licenses/>. 18 * 19 * Written by: 20 * Jasper St. Pierre <jstpierre@mecheye.net> 21 */ 22 23 #include <linux/kernel.h> 24 #include <linux/module.h> 25 #include <linux/mutex.h> 26 #include <linux/platform_device.h> 27 #include <linux/component.h> 28 #include <linux/of_graph.h> 29 30 #include <drm/drmP.h> 31 #include <drm/drm_atomic.h> 32 #include <drm/drm_atomic_helper.h> 33 #include <drm/drm_flip_work.h> 34 #include <drm/drm_crtc_helper.h> 35 #include <drm/drm_plane_helper.h> 36 #include <drm/drm_gem_cma_helper.h> 37 #include <drm/drm_gem_framebuffer_helper.h> 38 #include <drm/drm_fb_cma_helper.h> 39 #include <drm/drm_rect.h> 40 #include <drm/drm_fb_helper.h> 41 42 #include "meson_drv.h" 43 #include "meson_plane.h" 44 #include "meson_overlay.h" 45 #include "meson_crtc.h" 46 #include "meson_venc_cvbs.h" 47 48 #include "meson_vpp.h" 49 #include "meson_viu.h" 50 #include "meson_venc.h" 51 #include "meson_canvas.h" 52 #include "meson_registers.h" 53 54 #define DRIVER_NAME "meson" 55 #define DRIVER_DESC "Amlogic Meson DRM driver" 56 57 /** 58 * DOC: Video Processing Unit 59 * 60 * VPU Handles the Global Video Processing, it includes management of the 61 * clocks gates, blocks reset lines and power domains. 62 * 63 * What is missing : 64 * 65 * - Full reset of entire video processing HW blocks 66 * - Scaling and setup of the VPU clock 67 * - Bus clock gates 68 * - Powering up video processing HW blocks 69 * - Powering Up HDMI controller and PHY 70 */ 71 72 static const struct drm_mode_config_funcs meson_mode_config_funcs = { 73 .atomic_check = drm_atomic_helper_check, 74 .atomic_commit = drm_atomic_helper_commit, 75 .fb_create = drm_gem_fb_create, 76 }; 77 78 static irqreturn_t meson_irq(int irq, void *arg) 79 { 80 struct drm_device *dev = arg; 81 struct meson_drm *priv = dev->dev_private; 82 83 (void)readl_relaxed(priv->io_base + _REG(VENC_INTFLAG)); 84 85 meson_crtc_irq(priv); 86 87 return IRQ_HANDLED; 88 } 89 90 DEFINE_DRM_GEM_CMA_FOPS(fops); 91 92 static struct drm_driver meson_driver = { 93 .driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM | 94 DRIVER_MODESET | DRIVER_PRIME | 95 DRIVER_ATOMIC, 96 97 /* IRQ */ 98 .irq_handler = meson_irq, 99 100 /* PRIME Ops */ 101 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, 102 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, 103 .gem_prime_import = drm_gem_prime_import, 104 .gem_prime_export = drm_gem_prime_export, 105 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table, 106 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table, 107 .gem_prime_vmap = drm_gem_cma_prime_vmap, 108 .gem_prime_vunmap = drm_gem_cma_prime_vunmap, 109 .gem_prime_mmap = drm_gem_cma_prime_mmap, 110 111 /* GEM Ops */ 112 .dumb_create = drm_gem_cma_dumb_create, 113 .gem_free_object_unlocked = drm_gem_cma_free_object, 114 .gem_vm_ops = &drm_gem_cma_vm_ops, 115 116 /* Misc */ 117 .fops = &fops, 118 .name = DRIVER_NAME, 119 .desc = DRIVER_DESC, 120 .date = "20161109", 121 .major = 1, 122 .minor = 0, 123 }; 124 125 static bool meson_vpu_has_available_connectors(struct device *dev) 126 { 127 struct device_node *ep, *remote; 128 129 /* Parses each endpoint and check if remote exists */ 130 for_each_endpoint_of_node(dev->of_node, ep) { 131 /* If the endpoint node exists, consider it enabled */ 132 remote = of_graph_get_remote_port(ep); 133 if (remote) 134 return true; 135 } 136 137 return false; 138 } 139 140 static struct regmap_config meson_regmap_config = { 141 .reg_bits = 32, 142 .val_bits = 32, 143 .reg_stride = 4, 144 .max_register = 0x1000, 145 }; 146 147 static void meson_vpu_init(struct meson_drm *priv) 148 { 149 writel_relaxed(0x210000, priv->io_base + _REG(VPU_RDARB_MODE_L1C1)); 150 writel_relaxed(0x10000, priv->io_base + _REG(VPU_RDARB_MODE_L1C2)); 151 writel_relaxed(0x900000, priv->io_base + _REG(VPU_RDARB_MODE_L2C1)); 152 writel_relaxed(0x20000, priv->io_base + _REG(VPU_WRARB_MODE_L2C1)); 153 } 154 155 static int meson_drv_bind_master(struct device *dev, bool has_components) 156 { 157 struct platform_device *pdev = to_platform_device(dev); 158 struct meson_drm *priv; 159 struct drm_device *drm; 160 struct resource *res; 161 void __iomem *regs; 162 int ret; 163 164 /* Checks if an output connector is available */ 165 if (!meson_vpu_has_available_connectors(dev)) { 166 dev_err(dev, "No output connector available\n"); 167 return -ENODEV; 168 } 169 170 drm = drm_dev_alloc(&meson_driver, dev); 171 if (IS_ERR(drm)) 172 return PTR_ERR(drm); 173 174 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 175 if (!priv) { 176 ret = -ENOMEM; 177 goto free_drm; 178 } 179 drm->dev_private = priv; 180 priv->drm = drm; 181 priv->dev = dev; 182 183 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "vpu"); 184 regs = devm_ioremap_resource(dev, res); 185 if (IS_ERR(regs)) { 186 ret = PTR_ERR(regs); 187 goto free_drm; 188 } 189 190 priv->io_base = regs; 191 192 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hhi"); 193 if (!res) { 194 ret = -EINVAL; 195 goto free_drm; 196 } 197 /* Simply ioremap since it may be a shared register zone */ 198 regs = devm_ioremap(dev, res->start, resource_size(res)); 199 if (!regs) { 200 ret = -EADDRNOTAVAIL; 201 goto free_drm; 202 } 203 204 priv->hhi = devm_regmap_init_mmio(dev, regs, 205 &meson_regmap_config); 206 if (IS_ERR(priv->hhi)) { 207 dev_err(&pdev->dev, "Couldn't create the HHI regmap\n"); 208 ret = PTR_ERR(priv->hhi); 209 goto free_drm; 210 } 211 212 priv->canvas = meson_canvas_get(dev); 213 if (!IS_ERR(priv->canvas)) { 214 ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_osd1); 215 if (ret) 216 goto free_drm; 217 ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_0); 218 if (ret) { 219 meson_canvas_free(priv->canvas, priv->canvas_id_osd1); 220 goto free_drm; 221 } 222 ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_1); 223 if (ret) { 224 meson_canvas_free(priv->canvas, priv->canvas_id_osd1); 225 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0); 226 goto free_drm; 227 } 228 ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_2); 229 if (ret) { 230 meson_canvas_free(priv->canvas, priv->canvas_id_osd1); 231 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0); 232 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_1); 233 goto free_drm; 234 } 235 } else { 236 priv->canvas = NULL; 237 238 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dmc"); 239 if (!res) { 240 ret = -EINVAL; 241 goto free_drm; 242 } 243 /* Simply ioremap since it may be a shared register zone */ 244 regs = devm_ioremap(dev, res->start, resource_size(res)); 245 if (!regs) { 246 ret = -EADDRNOTAVAIL; 247 goto free_drm; 248 } 249 250 priv->dmc = devm_regmap_init_mmio(dev, regs, 251 &meson_regmap_config); 252 if (IS_ERR(priv->dmc)) { 253 dev_err(&pdev->dev, "Couldn't create the DMC regmap\n"); 254 ret = PTR_ERR(priv->dmc); 255 goto free_drm; 256 } 257 } 258 259 priv->vsync_irq = platform_get_irq(pdev, 0); 260 261 ret = drm_vblank_init(drm, 1); 262 if (ret) 263 goto free_drm; 264 265 drm_mode_config_init(drm); 266 drm->mode_config.max_width = 3840; 267 drm->mode_config.max_height = 2160; 268 drm->mode_config.funcs = &meson_mode_config_funcs; 269 270 /* Hardware Initialization */ 271 272 meson_vpu_init(priv); 273 meson_venc_init(priv); 274 meson_vpp_init(priv); 275 meson_viu_init(priv); 276 277 /* Encoder Initialization */ 278 279 ret = meson_venc_cvbs_create(priv); 280 if (ret) 281 goto free_drm; 282 283 if (has_components) { 284 ret = component_bind_all(drm->dev, drm); 285 if (ret) { 286 dev_err(drm->dev, "Couldn't bind all components\n"); 287 goto free_drm; 288 } 289 } 290 291 ret = meson_plane_create(priv); 292 if (ret) 293 goto free_drm; 294 295 ret = meson_overlay_create(priv); 296 if (ret) 297 goto free_drm; 298 299 ret = meson_crtc_create(priv); 300 if (ret) 301 goto free_drm; 302 303 ret = drm_irq_install(drm, priv->vsync_irq); 304 if (ret) 305 goto free_drm; 306 307 drm_mode_config_reset(drm); 308 309 drm_kms_helper_poll_init(drm); 310 311 platform_set_drvdata(pdev, priv); 312 313 ret = drm_dev_register(drm, 0); 314 if (ret) 315 goto free_drm; 316 317 drm_fbdev_generic_setup(drm, 32); 318 319 return 0; 320 321 free_drm: 322 drm_dev_put(drm); 323 324 return ret; 325 } 326 327 static int meson_drv_bind(struct device *dev) 328 { 329 return meson_drv_bind_master(dev, true); 330 } 331 332 static void meson_drv_unbind(struct device *dev) 333 { 334 struct drm_device *drm = dev_get_drvdata(dev); 335 struct meson_drm *priv = drm->dev_private; 336 337 if (priv->canvas) { 338 meson_canvas_free(priv->canvas, priv->canvas_id_osd1); 339 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0); 340 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_1); 341 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_2); 342 } 343 344 drm_dev_unregister(drm); 345 drm_kms_helper_poll_fini(drm); 346 drm_mode_config_cleanup(drm); 347 drm_dev_put(drm); 348 349 } 350 351 static const struct component_master_ops meson_drv_master_ops = { 352 .bind = meson_drv_bind, 353 .unbind = meson_drv_unbind, 354 }; 355 356 static int compare_of(struct device *dev, void *data) 357 { 358 DRM_DEBUG_DRIVER("Comparing of node %pOF with %pOF\n", 359 dev->of_node, data); 360 361 return dev->of_node == data; 362 } 363 364 /* Possible connectors nodes to ignore */ 365 static const struct of_device_id connectors_match[] = { 366 { .compatible = "composite-video-connector" }, 367 { .compatible = "svideo-connector" }, 368 { .compatible = "hdmi-connector" }, 369 { .compatible = "dvi-connector" }, 370 {} 371 }; 372 373 static int meson_probe_remote(struct platform_device *pdev, 374 struct component_match **match, 375 struct device_node *parent, 376 struct device_node *remote) 377 { 378 struct device_node *ep, *remote_node; 379 int count = 1; 380 381 /* If node is a connector, return and do not add to match table */ 382 if (of_match_node(connectors_match, remote)) 383 return 1; 384 385 component_match_add(&pdev->dev, match, compare_of, remote); 386 387 for_each_endpoint_of_node(remote, ep) { 388 remote_node = of_graph_get_remote_port_parent(ep); 389 if (!remote_node || 390 remote_node == parent || /* Ignore parent endpoint */ 391 !of_device_is_available(remote_node)) 392 continue; 393 394 count += meson_probe_remote(pdev, match, remote, remote_node); 395 396 of_node_put(remote_node); 397 } 398 399 return count; 400 } 401 402 static int meson_drv_probe(struct platform_device *pdev) 403 { 404 struct component_match *match = NULL; 405 struct device_node *np = pdev->dev.of_node; 406 struct device_node *ep, *remote; 407 int count = 0; 408 409 for_each_endpoint_of_node(np, ep) { 410 remote = of_graph_get_remote_port_parent(ep); 411 if (!remote || !of_device_is_available(remote)) 412 continue; 413 414 count += meson_probe_remote(pdev, &match, np, remote); 415 } 416 417 if (count && !match) 418 return meson_drv_bind_master(&pdev->dev, false); 419 420 /* If some endpoints were found, initialize the nodes */ 421 if (count) { 422 dev_info(&pdev->dev, "Queued %d outputs on vpu\n", count); 423 424 return component_master_add_with_match(&pdev->dev, 425 &meson_drv_master_ops, 426 match); 427 } 428 429 /* If no output endpoints were available, simply bail out */ 430 return 0; 431 }; 432 433 static const struct of_device_id dt_match[] = { 434 { .compatible = "amlogic,meson-gxbb-vpu" }, 435 { .compatible = "amlogic,meson-gxl-vpu" }, 436 { .compatible = "amlogic,meson-gxm-vpu" }, 437 {} 438 }; 439 MODULE_DEVICE_TABLE(of, dt_match); 440 441 static struct platform_driver meson_drm_platform_driver = { 442 .probe = meson_drv_probe, 443 .driver = { 444 .name = "meson-drm", 445 .of_match_table = dt_match, 446 }, 447 }; 448 449 module_platform_driver(meson_drm_platform_driver); 450 451 MODULE_AUTHOR("Jasper St. Pierre <jstpierre@mecheye.net>"); 452 MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>"); 453 MODULE_DESCRIPTION(DRIVER_DESC); 454 MODULE_LICENSE("GPL"); 455