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