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 sysfs_emit(buf, "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 sysfs_emit(buf, "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 sysfs_emit(buf, "%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; 155 156 for_each_available_child_of_node(np, child) { 157 if (of_node_name_eq(child, "pipeline")) { 158 of_property_read_u32(child, "reg", &pipe_id); 159 if (pipe_id >= mdev->n_pipelines) { 160 DRM_WARN("Skip the redundant DT node: pipeline-%u.\n", 161 pipe_id); 162 continue; 163 } 164 mdev->pipelines[pipe_id]->of_node = of_node_get(child); 165 } 166 } 167 168 for (pipe_id = 0; pipe_id < mdev->n_pipelines; pipe_id++) { 169 pipe = mdev->pipelines[pipe_id]; 170 171 if (!pipe->of_node) { 172 DRM_ERROR("Pipeline-%d doesn't have a DT node.\n", 173 pipe->id); 174 return -EINVAL; 175 } 176 ret = komeda_parse_pipe_dt(pipe); 177 if (ret) 178 return ret; 179 } 180 181 return 0; 182 } 183 184 struct komeda_dev *komeda_dev_create(struct device *dev) 185 { 186 struct platform_device *pdev = to_platform_device(dev); 187 komeda_identify_func komeda_identify; 188 struct komeda_dev *mdev; 189 int err = 0; 190 191 komeda_identify = of_device_get_match_data(dev); 192 if (!komeda_identify) 193 return ERR_PTR(-ENODEV); 194 195 mdev = devm_kzalloc(dev, sizeof(*mdev), GFP_KERNEL); 196 if (!mdev) 197 return ERR_PTR(-ENOMEM); 198 199 mutex_init(&mdev->lock); 200 201 mdev->dev = dev; 202 mdev->reg_base = devm_platform_ioremap_resource(pdev, 0); 203 if (IS_ERR(mdev->reg_base)) { 204 DRM_ERROR("Map register space failed.\n"); 205 err = PTR_ERR(mdev->reg_base); 206 mdev->reg_base = NULL; 207 goto err_cleanup; 208 } 209 210 mdev->aclk = devm_clk_get(dev, "aclk"); 211 if (IS_ERR(mdev->aclk)) { 212 DRM_ERROR("Get engine clk failed.\n"); 213 err = PTR_ERR(mdev->aclk); 214 mdev->aclk = NULL; 215 goto err_cleanup; 216 } 217 218 clk_prepare_enable(mdev->aclk); 219 220 mdev->funcs = komeda_identify(mdev->reg_base, &mdev->chip); 221 if (!mdev->funcs) { 222 DRM_ERROR("Failed to identify the HW.\n"); 223 err = -ENODEV; 224 goto disable_clk; 225 } 226 227 DRM_INFO("Found ARM Mali-D%x version r%dp%d\n", 228 MALIDP_CORE_ID_PRODUCT_ID(mdev->chip.core_id), 229 MALIDP_CORE_ID_MAJOR(mdev->chip.core_id), 230 MALIDP_CORE_ID_MINOR(mdev->chip.core_id)); 231 232 mdev->funcs->init_format_table(mdev); 233 234 err = mdev->funcs->enum_resources(mdev); 235 if (err) { 236 DRM_ERROR("enumerate display resource failed.\n"); 237 goto disable_clk; 238 } 239 240 err = komeda_parse_dt(dev, mdev); 241 if (err) { 242 DRM_ERROR("parse device tree failed.\n"); 243 goto disable_clk; 244 } 245 246 err = komeda_assemble_pipelines(mdev); 247 if (err) { 248 DRM_ERROR("assemble display pipelines failed.\n"); 249 goto disable_clk; 250 } 251 252 dma_set_max_seg_size(dev, U32_MAX); 253 254 mdev->iommu = iommu_get_domain_for_dev(mdev->dev); 255 if (!mdev->iommu) 256 DRM_INFO("continue without IOMMU support!\n"); 257 258 clk_disable_unprepare(mdev->aclk); 259 260 err = sysfs_create_group(&dev->kobj, &komeda_sysfs_attr_group); 261 if (err) { 262 DRM_ERROR("create sysfs group failed.\n"); 263 goto err_cleanup; 264 } 265 266 mdev->err_verbosity = KOMEDA_DEV_PRINT_ERR_EVENTS; 267 268 #ifdef CONFIG_DEBUG_FS 269 komeda_debugfs_init(mdev); 270 #endif 271 272 return mdev; 273 274 disable_clk: 275 clk_disable_unprepare(mdev->aclk); 276 err_cleanup: 277 komeda_dev_destroy(mdev); 278 return ERR_PTR(err); 279 } 280 281 void komeda_dev_destroy(struct komeda_dev *mdev) 282 { 283 struct device *dev = mdev->dev; 284 const struct komeda_dev_funcs *funcs = mdev->funcs; 285 int i; 286 287 sysfs_remove_group(&dev->kobj, &komeda_sysfs_attr_group); 288 289 #ifdef CONFIG_DEBUG_FS 290 debugfs_remove_recursive(mdev->debugfs_root); 291 #endif 292 293 if (mdev->aclk) 294 clk_prepare_enable(mdev->aclk); 295 296 for (i = 0; i < mdev->n_pipelines; i++) { 297 komeda_pipeline_destroy(mdev, mdev->pipelines[i]); 298 mdev->pipelines[i] = NULL; 299 } 300 301 mdev->n_pipelines = 0; 302 303 of_reserved_mem_device_release(dev); 304 305 if (funcs && funcs->cleanup) 306 funcs->cleanup(mdev); 307 308 if (mdev->reg_base) { 309 devm_iounmap(dev, mdev->reg_base); 310 mdev->reg_base = NULL; 311 } 312 313 if (mdev->aclk) { 314 clk_disable_unprepare(mdev->aclk); 315 devm_clk_put(dev, mdev->aclk); 316 mdev->aclk = NULL; 317 } 318 319 devm_kfree(dev, mdev); 320 } 321 322 int komeda_dev_resume(struct komeda_dev *mdev) 323 { 324 clk_prepare_enable(mdev->aclk); 325 326 mdev->funcs->enable_irq(mdev); 327 328 if (mdev->iommu && mdev->funcs->connect_iommu) 329 if (mdev->funcs->connect_iommu(mdev)) 330 DRM_ERROR("connect iommu failed.\n"); 331 332 return 0; 333 } 334 335 int komeda_dev_suspend(struct komeda_dev *mdev) 336 { 337 if (mdev->iommu && mdev->funcs->disconnect_iommu) 338 if (mdev->funcs->disconnect_iommu(mdev)) 339 DRM_ERROR("disconnect iommu failed.\n"); 340 341 mdev->funcs->disable_irq(mdev); 342 343 clk_disable_unprepare(mdev->aclk); 344 345 return 0; 346 } 347