1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * (C) COPYRIGHT 2018 ARM Limited. All rights reserved. 4 * Author: James.Qian.Wang <james.qian.wang@arm.com> 5 * 6 */ 7 #include <linux/io.h> 8 #include <linux/iommu.h> 9 #include <linux/of_device.h> 10 #include <linux/of_graph.h> 11 #include <linux/of_reserved_mem.h> 12 #include <linux/platform_device.h> 13 #include <linux/pm_runtime.h> 14 #include <linux/dma-mapping.h> 15 #ifdef CONFIG_DEBUG_FS 16 #include <linux/debugfs.h> 17 #include <linux/seq_file.h> 18 #endif 19 20 #include <drm/drm_print.h> 21 22 #include "komeda_dev.h" 23 24 static int komeda_register_show(struct seq_file *sf, void *x) 25 { 26 struct komeda_dev *mdev = sf->private; 27 int i; 28 29 seq_puts(sf, "\n====== Komeda register dump =========\n"); 30 31 pm_runtime_get_sync(mdev->dev); 32 33 if (mdev->funcs->dump_register) 34 mdev->funcs->dump_register(mdev, sf); 35 36 for (i = 0; i < mdev->n_pipelines; i++) 37 komeda_pipeline_dump_register(mdev->pipelines[i], sf); 38 39 pm_runtime_put(mdev->dev); 40 41 return 0; 42 } 43 44 static int komeda_register_open(struct inode *inode, struct file *filp) 45 { 46 return single_open(filp, komeda_register_show, inode->i_private); 47 } 48 49 static const struct file_operations komeda_register_fops = { 50 .owner = THIS_MODULE, 51 .open = komeda_register_open, 52 .read = seq_read, 53 .llseek = seq_lseek, 54 .release = single_release, 55 }; 56 57 #ifdef CONFIG_DEBUG_FS 58 static void komeda_debugfs_init(struct komeda_dev *mdev) 59 { 60 if (!debugfs_initialized()) 61 return; 62 63 mdev->debugfs_root = debugfs_create_dir("komeda", NULL); 64 debugfs_create_file("register", 0444, mdev->debugfs_root, 65 mdev, &komeda_register_fops); 66 debugfs_create_x16("err_verbosity", 0664, mdev->debugfs_root, 67 &mdev->err_verbosity); 68 } 69 #endif 70 71 static ssize_t 72 core_id_show(struct device *dev, struct device_attribute *attr, char *buf) 73 { 74 struct komeda_dev *mdev = dev_to_mdev(dev); 75 76 return snprintf(buf, PAGE_SIZE, "0x%08x\n", mdev->chip.core_id); 77 } 78 static DEVICE_ATTR_RO(core_id); 79 80 static ssize_t 81 config_id_show(struct device *dev, struct device_attribute *attr, char *buf) 82 { 83 struct komeda_dev *mdev = dev_to_mdev(dev); 84 struct komeda_pipeline *pipe = mdev->pipelines[0]; 85 union komeda_config_id config_id; 86 int i; 87 88 memset(&config_id, 0, sizeof(config_id)); 89 90 config_id.max_line_sz = pipe->layers[0]->hsize_in.end; 91 config_id.n_pipelines = mdev->n_pipelines; 92 config_id.n_scalers = pipe->n_scalers; 93 config_id.n_layers = pipe->n_layers; 94 config_id.n_richs = 0; 95 for (i = 0; i < pipe->n_layers; i++) { 96 if (pipe->layers[i]->layer_type == KOMEDA_FMT_RICH_LAYER) 97 config_id.n_richs++; 98 } 99 return snprintf(buf, PAGE_SIZE, "0x%08x\n", config_id.value); 100 } 101 static DEVICE_ATTR_RO(config_id); 102 103 static ssize_t 104 aclk_hz_show(struct device *dev, struct device_attribute *attr, char *buf) 105 { 106 struct komeda_dev *mdev = dev_to_mdev(dev); 107 108 return snprintf(buf, PAGE_SIZE, "%lu\n", clk_get_rate(mdev->aclk)); 109 } 110 static DEVICE_ATTR_RO(aclk_hz); 111 112 static struct attribute *komeda_sysfs_entries[] = { 113 &dev_attr_core_id.attr, 114 &dev_attr_config_id.attr, 115 &dev_attr_aclk_hz.attr, 116 NULL, 117 }; 118 119 static struct attribute_group komeda_sysfs_attr_group = { 120 .attrs = komeda_sysfs_entries, 121 }; 122 123 static int komeda_parse_pipe_dt(struct komeda_pipeline *pipe) 124 { 125 struct device_node *np = pipe->of_node; 126 struct clk *clk; 127 128 clk = of_clk_get_by_name(np, "pxclk"); 129 if (IS_ERR(clk)) { 130 DRM_ERROR("get pxclk for pipeline %d failed!\n", pipe->id); 131 return PTR_ERR(clk); 132 } 133 pipe->pxlclk = clk; 134 135 /* enum ports */ 136 pipe->of_output_links[0] = 137 of_graph_get_remote_node(np, KOMEDA_OF_PORT_OUTPUT, 0); 138 pipe->of_output_links[1] = 139 of_graph_get_remote_node(np, KOMEDA_OF_PORT_OUTPUT, 1); 140 pipe->of_output_port = 141 of_graph_get_port_by_id(np, KOMEDA_OF_PORT_OUTPUT); 142 143 pipe->dual_link = pipe->of_output_links[0] && pipe->of_output_links[1]; 144 145 return 0; 146 } 147 148 static int komeda_parse_dt(struct device *dev, struct komeda_dev *mdev) 149 { 150 struct platform_device *pdev = to_platform_device(dev); 151 struct device_node *child, *np = dev->of_node; 152 struct komeda_pipeline *pipe; 153 u32 pipe_id = U32_MAX; 154 int ret = -1; 155 156 mdev->irq = platform_get_irq(pdev, 0); 157 if (mdev->irq < 0) { 158 DRM_ERROR("could not get IRQ number.\n"); 159 return mdev->irq; 160 } 161 162 /* Get the optional framebuffer memory resource */ 163 ret = of_reserved_mem_device_init(dev); 164 if (ret && ret != -ENODEV) 165 return ret; 166 ret = 0; 167 168 for_each_available_child_of_node(np, child) { 169 if (of_node_name_eq(child, "pipeline")) { 170 of_property_read_u32(child, "reg", &pipe_id); 171 if (pipe_id >= mdev->n_pipelines) { 172 DRM_WARN("Skip the redundant DT node: pipeline-%u.\n", 173 pipe_id); 174 continue; 175 } 176 mdev->pipelines[pipe_id]->of_node = of_node_get(child); 177 } 178 } 179 180 for (pipe_id = 0; pipe_id < mdev->n_pipelines; pipe_id++) { 181 pipe = mdev->pipelines[pipe_id]; 182 183 if (!pipe->of_node) { 184 DRM_ERROR("Pipeline-%d doesn't have a DT node.\n", 185 pipe->id); 186 return -EINVAL; 187 } 188 ret = komeda_parse_pipe_dt(pipe); 189 if (ret) 190 return ret; 191 } 192 193 return 0; 194 } 195 196 struct komeda_dev *komeda_dev_create(struct device *dev) 197 { 198 struct platform_device *pdev = to_platform_device(dev); 199 komeda_identify_func komeda_identify; 200 struct komeda_dev *mdev; 201 int err = 0; 202 203 komeda_identify = of_device_get_match_data(dev); 204 if (!komeda_identify) 205 return ERR_PTR(-ENODEV); 206 207 mdev = devm_kzalloc(dev, sizeof(*mdev), GFP_KERNEL); 208 if (!mdev) 209 return ERR_PTR(-ENOMEM); 210 211 mutex_init(&mdev->lock); 212 213 mdev->dev = dev; 214 mdev->reg_base = devm_platform_ioremap_resource(pdev, 0); 215 if (IS_ERR(mdev->reg_base)) { 216 DRM_ERROR("Map register space failed.\n"); 217 err = PTR_ERR(mdev->reg_base); 218 mdev->reg_base = NULL; 219 goto err_cleanup; 220 } 221 222 mdev->aclk = devm_clk_get(dev, "aclk"); 223 if (IS_ERR(mdev->aclk)) { 224 DRM_ERROR("Get engine clk failed.\n"); 225 err = PTR_ERR(mdev->aclk); 226 mdev->aclk = NULL; 227 goto err_cleanup; 228 } 229 230 clk_prepare_enable(mdev->aclk); 231 232 mdev->funcs = komeda_identify(mdev->reg_base, &mdev->chip); 233 if (!mdev->funcs) { 234 DRM_ERROR("Failed to identify the HW.\n"); 235 err = -ENODEV; 236 goto disable_clk; 237 } 238 239 DRM_INFO("Found ARM Mali-D%x version r%dp%d\n", 240 MALIDP_CORE_ID_PRODUCT_ID(mdev->chip.core_id), 241 MALIDP_CORE_ID_MAJOR(mdev->chip.core_id), 242 MALIDP_CORE_ID_MINOR(mdev->chip.core_id)); 243 244 mdev->funcs->init_format_table(mdev); 245 246 err = mdev->funcs->enum_resources(mdev); 247 if (err) { 248 DRM_ERROR("enumerate display resource failed.\n"); 249 goto disable_clk; 250 } 251 252 err = komeda_parse_dt(dev, mdev); 253 if (err) { 254 DRM_ERROR("parse device tree failed.\n"); 255 goto disable_clk; 256 } 257 258 err = komeda_assemble_pipelines(mdev); 259 if (err) { 260 DRM_ERROR("assemble display pipelines failed.\n"); 261 goto disable_clk; 262 } 263 264 dev->dma_parms = &mdev->dma_parms; 265 dma_set_max_seg_size(dev, DMA_BIT_MASK(32)); 266 267 mdev->iommu = iommu_get_domain_for_dev(mdev->dev); 268 if (!mdev->iommu) 269 DRM_INFO("continue without IOMMU support!\n"); 270 271 clk_disable_unprepare(mdev->aclk); 272 273 err = sysfs_create_group(&dev->kobj, &komeda_sysfs_attr_group); 274 if (err) { 275 DRM_ERROR("create sysfs group failed.\n"); 276 goto err_cleanup; 277 } 278 279 mdev->err_verbosity = KOMEDA_DEV_PRINT_ERR_EVENTS; 280 281 #ifdef CONFIG_DEBUG_FS 282 komeda_debugfs_init(mdev); 283 #endif 284 285 return mdev; 286 287 disable_clk: 288 clk_disable_unprepare(mdev->aclk); 289 err_cleanup: 290 komeda_dev_destroy(mdev); 291 return ERR_PTR(err); 292 } 293 294 void komeda_dev_destroy(struct komeda_dev *mdev) 295 { 296 struct device *dev = mdev->dev; 297 const struct komeda_dev_funcs *funcs = mdev->funcs; 298 int i; 299 300 sysfs_remove_group(&dev->kobj, &komeda_sysfs_attr_group); 301 302 #ifdef CONFIG_DEBUG_FS 303 debugfs_remove_recursive(mdev->debugfs_root); 304 #endif 305 306 if (mdev->aclk) 307 clk_prepare_enable(mdev->aclk); 308 309 for (i = 0; i < mdev->n_pipelines; i++) { 310 komeda_pipeline_destroy(mdev, mdev->pipelines[i]); 311 mdev->pipelines[i] = NULL; 312 } 313 314 mdev->n_pipelines = 0; 315 316 of_reserved_mem_device_release(dev); 317 318 if (funcs && funcs->cleanup) 319 funcs->cleanup(mdev); 320 321 if (mdev->reg_base) { 322 devm_iounmap(dev, mdev->reg_base); 323 mdev->reg_base = NULL; 324 } 325 326 if (mdev->aclk) { 327 clk_disable_unprepare(mdev->aclk); 328 devm_clk_put(dev, mdev->aclk); 329 mdev->aclk = NULL; 330 } 331 332 devm_kfree(dev, mdev); 333 } 334 335 int komeda_dev_resume(struct komeda_dev *mdev) 336 { 337 clk_prepare_enable(mdev->aclk); 338 339 mdev->funcs->enable_irq(mdev); 340 341 if (mdev->iommu && mdev->funcs->connect_iommu) 342 if (mdev->funcs->connect_iommu(mdev)) 343 DRM_ERROR("connect iommu failed.\n"); 344 345 return 0; 346 } 347 348 int komeda_dev_suspend(struct komeda_dev *mdev) 349 { 350 if (mdev->iommu && mdev->funcs->disconnect_iommu) 351 if (mdev->funcs->disconnect_iommu(mdev)) 352 DRM_ERROR("disconnect iommu failed.\n"); 353 354 mdev->funcs->disable_irq(mdev); 355 356 clk_disable_unprepare(mdev->aclk); 357 358 return 0; 359 } 360