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/dma-mapping.h> 14 #ifdef CONFIG_DEBUG_FS 15 #include <linux/debugfs.h> 16 #include <linux/seq_file.h> 17 #endif 18 19 #include <drm/drm_print.h> 20 21 #include "komeda_dev.h" 22 23 static int komeda_register_show(struct seq_file *sf, void *x) 24 { 25 struct komeda_dev *mdev = sf->private; 26 int i; 27 28 if (mdev->funcs->dump_register) 29 mdev->funcs->dump_register(mdev, sf); 30 31 for (i = 0; i < mdev->n_pipelines; i++) 32 komeda_pipeline_dump_register(mdev->pipelines[i], sf); 33 34 return 0; 35 } 36 37 static int komeda_register_open(struct inode *inode, struct file *filp) 38 { 39 return single_open(filp, komeda_register_show, inode->i_private); 40 } 41 42 static const struct file_operations komeda_register_fops = { 43 .owner = THIS_MODULE, 44 .open = komeda_register_open, 45 .read = seq_read, 46 .llseek = seq_lseek, 47 .release = single_release, 48 }; 49 50 #ifdef CONFIG_DEBUG_FS 51 static void komeda_debugfs_init(struct komeda_dev *mdev) 52 { 53 if (!debugfs_initialized()) 54 return; 55 56 mdev->debugfs_root = debugfs_create_dir("komeda", NULL); 57 debugfs_create_file("register", 0444, mdev->debugfs_root, 58 mdev, &komeda_register_fops); 59 } 60 #endif 61 62 static ssize_t 63 core_id_show(struct device *dev, struct device_attribute *attr, char *buf) 64 { 65 struct komeda_dev *mdev = dev_to_mdev(dev); 66 67 return snprintf(buf, PAGE_SIZE, "0x%08x\n", mdev->chip.core_id); 68 } 69 static DEVICE_ATTR_RO(core_id); 70 71 static ssize_t 72 config_id_show(struct device *dev, struct device_attribute *attr, char *buf) 73 { 74 struct komeda_dev *mdev = dev_to_mdev(dev); 75 struct komeda_pipeline *pipe = mdev->pipelines[0]; 76 union komeda_config_id config_id; 77 int i; 78 79 memset(&config_id, 0, sizeof(config_id)); 80 81 config_id.max_line_sz = pipe->layers[0]->hsize_in.end; 82 config_id.n_pipelines = mdev->n_pipelines; 83 config_id.n_scalers = pipe->n_scalers; 84 config_id.n_layers = pipe->n_layers; 85 config_id.n_richs = 0; 86 for (i = 0; i < pipe->n_layers; i++) { 87 if (pipe->layers[i]->layer_type == KOMEDA_FMT_RICH_LAYER) 88 config_id.n_richs++; 89 } 90 return snprintf(buf, PAGE_SIZE, "0x%08x\n", config_id.value); 91 } 92 static DEVICE_ATTR_RO(config_id); 93 94 static ssize_t 95 aclk_hz_show(struct device *dev, struct device_attribute *attr, char *buf) 96 { 97 struct komeda_dev *mdev = dev_to_mdev(dev); 98 99 return snprintf(buf, PAGE_SIZE, "%lu\n", clk_get_rate(mdev->aclk)); 100 } 101 static DEVICE_ATTR_RO(aclk_hz); 102 103 static struct attribute *komeda_sysfs_entries[] = { 104 &dev_attr_core_id.attr, 105 &dev_attr_config_id.attr, 106 &dev_attr_aclk_hz.attr, 107 NULL, 108 }; 109 110 static struct attribute_group komeda_sysfs_attr_group = { 111 .attrs = komeda_sysfs_entries, 112 }; 113 114 static int komeda_parse_pipe_dt(struct komeda_dev *mdev, struct device_node *np) 115 { 116 struct komeda_pipeline *pipe; 117 struct clk *clk; 118 u32 pipe_id; 119 int ret = 0; 120 121 ret = of_property_read_u32(np, "reg", &pipe_id); 122 if (ret != 0 || pipe_id >= mdev->n_pipelines) 123 return -EINVAL; 124 125 pipe = mdev->pipelines[pipe_id]; 126 127 clk = of_clk_get_by_name(np, "pxclk"); 128 if (IS_ERR(clk)) { 129 DRM_ERROR("get pxclk for pipeline %d failed!\n", pipe_id); 130 return PTR_ERR(clk); 131 } 132 pipe->pxlclk = clk; 133 134 /* enum ports */ 135 pipe->of_output_links[0] = 136 of_graph_get_remote_node(np, KOMEDA_OF_PORT_OUTPUT, 0); 137 pipe->of_output_links[1] = 138 of_graph_get_remote_node(np, KOMEDA_OF_PORT_OUTPUT, 1); 139 pipe->of_output_port = 140 of_graph_get_port_by_id(np, KOMEDA_OF_PORT_OUTPUT); 141 142 pipe->dual_link = pipe->of_output_links[0] && pipe->of_output_links[1]; 143 pipe->of_node = np; 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 int ret; 153 154 mdev->irq = platform_get_irq(pdev, 0); 155 if (mdev->irq < 0) { 156 DRM_ERROR("could not get IRQ number.\n"); 157 return mdev->irq; 158 } 159 160 /* Get the optional framebuffer memory resource */ 161 ret = of_reserved_mem_device_init(dev); 162 if (ret && ret != -ENODEV) 163 return ret; 164 ret = 0; 165 166 for_each_available_child_of_node(np, child) { 167 if (of_node_cmp(child->name, "pipeline") == 0) { 168 ret = komeda_parse_pipe_dt(mdev, child); 169 if (ret) { 170 DRM_ERROR("parse pipeline dt error!\n"); 171 of_node_put(child); 172 break; 173 } 174 } 175 } 176 177 return ret; 178 } 179 180 struct komeda_dev *komeda_dev_create(struct device *dev) 181 { 182 struct platform_device *pdev = to_platform_device(dev); 183 const struct komeda_product_data *product; 184 struct komeda_dev *mdev; 185 struct resource *io_res; 186 int err = 0; 187 188 product = of_device_get_match_data(dev); 189 if (!product) 190 return ERR_PTR(-ENODEV); 191 192 io_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 193 if (!io_res) { 194 DRM_ERROR("No registers defined.\n"); 195 return ERR_PTR(-ENODEV); 196 } 197 198 mdev = devm_kzalloc(dev, sizeof(*mdev), GFP_KERNEL); 199 if (!mdev) 200 return ERR_PTR(-ENOMEM); 201 202 mutex_init(&mdev->lock); 203 204 mdev->dev = dev; 205 mdev->reg_base = devm_ioremap_resource(dev, io_res); 206 if (IS_ERR(mdev->reg_base)) { 207 DRM_ERROR("Map register space failed.\n"); 208 err = PTR_ERR(mdev->reg_base); 209 mdev->reg_base = NULL; 210 goto err_cleanup; 211 } 212 213 mdev->aclk = devm_clk_get(dev, "aclk"); 214 if (IS_ERR(mdev->aclk)) { 215 DRM_ERROR("Get engine clk failed.\n"); 216 err = PTR_ERR(mdev->aclk); 217 mdev->aclk = NULL; 218 goto err_cleanup; 219 } 220 221 clk_prepare_enable(mdev->aclk); 222 223 mdev->funcs = product->identify(mdev->reg_base, &mdev->chip); 224 if (!komeda_product_match(mdev, product->product_id)) { 225 DRM_ERROR("DT configured %x mismatch with real HW %x.\n", 226 product->product_id, 227 MALIDP_CORE_ID_PRODUCT_ID(mdev->chip.core_id)); 228 err = -ENODEV; 229 goto err_cleanup; 230 } 231 232 DRM_INFO("Found ARM Mali-D%x version r%dp%d\n", 233 MALIDP_CORE_ID_PRODUCT_ID(mdev->chip.core_id), 234 MALIDP_CORE_ID_MAJOR(mdev->chip.core_id), 235 MALIDP_CORE_ID_MINOR(mdev->chip.core_id)); 236 237 mdev->funcs->init_format_table(mdev); 238 239 err = mdev->funcs->enum_resources(mdev); 240 if (err) { 241 DRM_ERROR("enumerate display resource failed.\n"); 242 goto err_cleanup; 243 } 244 245 err = komeda_parse_dt(dev, mdev); 246 if (err) { 247 DRM_ERROR("parse device tree failed.\n"); 248 goto err_cleanup; 249 } 250 251 err = komeda_assemble_pipelines(mdev); 252 if (err) { 253 DRM_ERROR("assemble display pipelines failed.\n"); 254 goto err_cleanup; 255 } 256 257 dev->dma_parms = &mdev->dma_parms; 258 dma_set_max_seg_size(dev, DMA_BIT_MASK(32)); 259 260 mdev->iommu = iommu_get_domain_for_dev(mdev->dev); 261 if (!mdev->iommu) 262 DRM_INFO("continue without IOMMU support!\n"); 263 264 if (mdev->iommu && mdev->funcs->connect_iommu) { 265 err = mdev->funcs->connect_iommu(mdev); 266 if (err) { 267 mdev->iommu = NULL; 268 goto err_cleanup; 269 } 270 } 271 272 err = sysfs_create_group(&dev->kobj, &komeda_sysfs_attr_group); 273 if (err) { 274 DRM_ERROR("create sysfs group failed.\n"); 275 goto err_cleanup; 276 } 277 278 #ifdef CONFIG_DEBUG_FS 279 komeda_debugfs_init(mdev); 280 #endif 281 282 return mdev; 283 284 err_cleanup: 285 komeda_dev_destroy(mdev); 286 return ERR_PTR(err); 287 } 288 289 void komeda_dev_destroy(struct komeda_dev *mdev) 290 { 291 struct device *dev = mdev->dev; 292 const struct komeda_dev_funcs *funcs = mdev->funcs; 293 int i; 294 295 sysfs_remove_group(&dev->kobj, &komeda_sysfs_attr_group); 296 297 #ifdef CONFIG_DEBUG_FS 298 debugfs_remove_recursive(mdev->debugfs_root); 299 #endif 300 301 if (mdev->iommu && mdev->funcs->disconnect_iommu) 302 mdev->funcs->disconnect_iommu(mdev); 303 mdev->iommu = NULL; 304 305 for (i = 0; i < mdev->n_pipelines; i++) { 306 komeda_pipeline_destroy(mdev, mdev->pipelines[i]); 307 mdev->pipelines[i] = NULL; 308 } 309 310 mdev->n_pipelines = 0; 311 312 of_reserved_mem_device_release(dev); 313 314 if (funcs && funcs->cleanup) 315 funcs->cleanup(mdev); 316 317 if (mdev->reg_base) { 318 devm_iounmap(dev, mdev->reg_base); 319 mdev->reg_base = NULL; 320 } 321 322 if (mdev->aclk) { 323 clk_disable_unprepare(mdev->aclk); 324 devm_clk_put(dev, mdev->aclk); 325 mdev->aclk = NULL; 326 } 327 328 devm_kfree(dev, mdev); 329 } 330