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/platform_device.h> 12 #include <linux/dma-mapping.h> 13 #ifdef CONFIG_DEBUG_FS 14 #include <linux/debugfs.h> 15 #include <linux/seq_file.h> 16 #endif 17 18 #include <drm/drm_print.h> 19 20 #include "komeda_dev.h" 21 22 static int komeda_register_show(struct seq_file *sf, void *x) 23 { 24 struct komeda_dev *mdev = sf->private; 25 int i; 26 27 if (mdev->funcs->dump_register) 28 mdev->funcs->dump_register(mdev, sf); 29 30 for (i = 0; i < mdev->n_pipelines; i++) 31 komeda_pipeline_dump_register(mdev->pipelines[i], sf); 32 33 return 0; 34 } 35 36 static int komeda_register_open(struct inode *inode, struct file *filp) 37 { 38 return single_open(filp, komeda_register_show, inode->i_private); 39 } 40 41 static const struct file_operations komeda_register_fops = { 42 .owner = THIS_MODULE, 43 .open = komeda_register_open, 44 .read = seq_read, 45 .llseek = seq_lseek, 46 .release = single_release, 47 }; 48 49 #ifdef CONFIG_DEBUG_FS 50 static void komeda_debugfs_init(struct komeda_dev *mdev) 51 { 52 if (!debugfs_initialized()) 53 return; 54 55 mdev->debugfs_root = debugfs_create_dir("komeda", NULL); 56 debugfs_create_file("register", 0444, mdev->debugfs_root, 57 mdev, &komeda_register_fops); 58 } 59 #endif 60 61 static ssize_t 62 core_id_show(struct device *dev, struct device_attribute *attr, char *buf) 63 { 64 struct komeda_dev *mdev = dev_to_mdev(dev); 65 66 return snprintf(buf, PAGE_SIZE, "0x%08x\n", mdev->chip.core_id); 67 } 68 static DEVICE_ATTR_RO(core_id); 69 70 static ssize_t 71 config_id_show(struct device *dev, struct device_attribute *attr, char *buf) 72 { 73 struct komeda_dev *mdev = dev_to_mdev(dev); 74 struct komeda_pipeline *pipe = mdev->pipelines[0]; 75 union komeda_config_id config_id; 76 int i; 77 78 memset(&config_id, 0, sizeof(config_id)); 79 80 config_id.max_line_sz = pipe->layers[0]->hsize_in.end; 81 config_id.n_pipelines = mdev->n_pipelines; 82 config_id.n_scalers = pipe->n_scalers; 83 config_id.n_layers = pipe->n_layers; 84 config_id.n_richs = 0; 85 for (i = 0; i < pipe->n_layers; i++) { 86 if (pipe->layers[i]->layer_type == KOMEDA_FMT_RICH_LAYER) 87 config_id.n_richs++; 88 } 89 return snprintf(buf, PAGE_SIZE, "0x%08x\n", config_id.value); 90 } 91 static DEVICE_ATTR_RO(config_id); 92 93 static struct attribute *komeda_sysfs_entries[] = { 94 &dev_attr_core_id.attr, 95 &dev_attr_config_id.attr, 96 NULL, 97 }; 98 99 static struct attribute_group komeda_sysfs_attr_group = { 100 .attrs = komeda_sysfs_entries, 101 }; 102 103 static int komeda_parse_pipe_dt(struct komeda_dev *mdev, struct device_node *np) 104 { 105 struct komeda_pipeline *pipe; 106 struct clk *clk; 107 u32 pipe_id; 108 int ret = 0; 109 110 ret = of_property_read_u32(np, "reg", &pipe_id); 111 if (ret != 0 || pipe_id >= mdev->n_pipelines) 112 return -EINVAL; 113 114 pipe = mdev->pipelines[pipe_id]; 115 116 clk = of_clk_get_by_name(np, "pxclk"); 117 if (IS_ERR(clk)) { 118 DRM_ERROR("get pxclk for pipeline %d failed!\n", pipe_id); 119 return PTR_ERR(clk); 120 } 121 pipe->pxlclk = clk; 122 123 /* enum ports */ 124 pipe->of_output_links[0] = 125 of_graph_get_remote_node(np, KOMEDA_OF_PORT_OUTPUT, 0); 126 pipe->of_output_links[1] = 127 of_graph_get_remote_node(np, KOMEDA_OF_PORT_OUTPUT, 1); 128 pipe->of_output_port = 129 of_graph_get_port_by_id(np, KOMEDA_OF_PORT_OUTPUT); 130 131 pipe->dual_link = pipe->of_output_links[0] && pipe->of_output_links[1]; 132 pipe->of_node = np; 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 int ret; 142 143 mdev->irq = platform_get_irq(pdev, 0); 144 if (mdev->irq < 0) { 145 DRM_ERROR("could not get IRQ number.\n"); 146 return mdev->irq; 147 } 148 149 for_each_available_child_of_node(np, child) { 150 if (of_node_cmp(child->name, "pipeline") == 0) { 151 ret = komeda_parse_pipe_dt(mdev, child); 152 if (ret) { 153 DRM_ERROR("parse pipeline dt error!\n"); 154 of_node_put(child); 155 break; 156 } 157 } 158 } 159 160 return ret; 161 } 162 163 struct komeda_dev *komeda_dev_create(struct device *dev) 164 { 165 struct platform_device *pdev = to_platform_device(dev); 166 const struct komeda_product_data *product; 167 struct komeda_dev *mdev; 168 struct resource *io_res; 169 int err = 0; 170 171 product = of_device_get_match_data(dev); 172 if (!product) 173 return ERR_PTR(-ENODEV); 174 175 io_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 176 if (!io_res) { 177 DRM_ERROR("No registers defined.\n"); 178 return ERR_PTR(-ENODEV); 179 } 180 181 mdev = devm_kzalloc(dev, sizeof(*mdev), GFP_KERNEL); 182 if (!mdev) 183 return ERR_PTR(-ENOMEM); 184 185 mutex_init(&mdev->lock); 186 187 mdev->dev = dev; 188 mdev->reg_base = devm_ioremap_resource(dev, io_res); 189 if (IS_ERR(mdev->reg_base)) { 190 DRM_ERROR("Map register space failed.\n"); 191 err = PTR_ERR(mdev->reg_base); 192 mdev->reg_base = NULL; 193 goto err_cleanup; 194 } 195 196 mdev->aclk = devm_clk_get(dev, "aclk"); 197 if (IS_ERR(mdev->aclk)) { 198 DRM_ERROR("Get engine clk failed.\n"); 199 err = PTR_ERR(mdev->aclk); 200 mdev->aclk = NULL; 201 goto err_cleanup; 202 } 203 204 clk_prepare_enable(mdev->aclk); 205 206 mdev->funcs = product->identify(mdev->reg_base, &mdev->chip); 207 if (!komeda_product_match(mdev, product->product_id)) { 208 DRM_ERROR("DT configured %x mismatch with real HW %x.\n", 209 product->product_id, 210 MALIDP_CORE_ID_PRODUCT_ID(mdev->chip.core_id)); 211 err = -ENODEV; 212 goto err_cleanup; 213 } 214 215 DRM_INFO("Found ARM Mali-D%x version r%dp%d\n", 216 MALIDP_CORE_ID_PRODUCT_ID(mdev->chip.core_id), 217 MALIDP_CORE_ID_MAJOR(mdev->chip.core_id), 218 MALIDP_CORE_ID_MINOR(mdev->chip.core_id)); 219 220 mdev->funcs->init_format_table(mdev); 221 222 err = mdev->funcs->enum_resources(mdev); 223 if (err) { 224 DRM_ERROR("enumerate display resource failed.\n"); 225 goto err_cleanup; 226 } 227 228 err = komeda_parse_dt(dev, mdev); 229 if (err) { 230 DRM_ERROR("parse device tree failed.\n"); 231 goto err_cleanup; 232 } 233 234 err = komeda_assemble_pipelines(mdev); 235 if (err) { 236 DRM_ERROR("assemble display pipelines failed.\n"); 237 goto err_cleanup; 238 } 239 240 dev->dma_parms = &mdev->dma_parms; 241 dma_set_max_seg_size(dev, DMA_BIT_MASK(32)); 242 243 mdev->iommu = iommu_get_domain_for_dev(mdev->dev); 244 if (!mdev->iommu) 245 DRM_INFO("continue without IOMMU support!\n"); 246 247 if (mdev->iommu && mdev->funcs->connect_iommu) { 248 err = mdev->funcs->connect_iommu(mdev); 249 if (err) { 250 mdev->iommu = NULL; 251 goto err_cleanup; 252 } 253 } 254 255 err = sysfs_create_group(&dev->kobj, &komeda_sysfs_attr_group); 256 if (err) { 257 DRM_ERROR("create sysfs group failed.\n"); 258 goto err_cleanup; 259 } 260 261 #ifdef CONFIG_DEBUG_FS 262 komeda_debugfs_init(mdev); 263 #endif 264 265 return mdev; 266 267 err_cleanup: 268 komeda_dev_destroy(mdev); 269 return ERR_PTR(err); 270 } 271 272 void komeda_dev_destroy(struct komeda_dev *mdev) 273 { 274 struct device *dev = mdev->dev; 275 const struct komeda_dev_funcs *funcs = mdev->funcs; 276 int i; 277 278 sysfs_remove_group(&dev->kobj, &komeda_sysfs_attr_group); 279 280 #ifdef CONFIG_DEBUG_FS 281 debugfs_remove_recursive(mdev->debugfs_root); 282 #endif 283 284 if (mdev->iommu && mdev->funcs->disconnect_iommu) 285 mdev->funcs->disconnect_iommu(mdev); 286 mdev->iommu = NULL; 287 288 for (i = 0; i < mdev->n_pipelines; i++) { 289 komeda_pipeline_destroy(mdev, mdev->pipelines[i]); 290 mdev->pipelines[i] = NULL; 291 } 292 293 mdev->n_pipelines = 0; 294 295 if (funcs && funcs->cleanup) 296 funcs->cleanup(mdev); 297 298 if (mdev->reg_base) { 299 devm_iounmap(dev, mdev->reg_base); 300 mdev->reg_base = NULL; 301 } 302 303 if (mdev->aclk) { 304 clk_disable_unprepare(mdev->aclk); 305 devm_clk_put(dev, mdev->aclk); 306 mdev->aclk = NULL; 307 } 308 309 devm_kfree(dev, mdev); 310 } 311