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