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/of_device.h> 9 #include <linux/of_graph.h> 10 #include <linux/platform_device.h> 11 #ifdef CONFIG_DEBUG_FS 12 #include <linux/debugfs.h> 13 #include <linux/seq_file.h> 14 #endif 15 16 #include <drm/drm_print.h> 17 18 #include "komeda_dev.h" 19 20 static int komeda_register_show(struct seq_file *sf, void *x) 21 { 22 struct komeda_dev *mdev = sf->private; 23 int i; 24 25 if (mdev->funcs->dump_register) 26 mdev->funcs->dump_register(mdev, sf); 27 28 for (i = 0; i < mdev->n_pipelines; i++) 29 komeda_pipeline_dump_register(mdev->pipelines[i], sf); 30 31 return 0; 32 } 33 34 static int komeda_register_open(struct inode *inode, struct file *filp) 35 { 36 return single_open(filp, komeda_register_show, inode->i_private); 37 } 38 39 static const struct file_operations komeda_register_fops = { 40 .owner = THIS_MODULE, 41 .open = komeda_register_open, 42 .read = seq_read, 43 .llseek = seq_lseek, 44 .release = single_release, 45 }; 46 47 #ifdef CONFIG_DEBUG_FS 48 static void komeda_debugfs_init(struct komeda_dev *mdev) 49 { 50 if (!debugfs_initialized()) 51 return; 52 53 mdev->debugfs_root = debugfs_create_dir("komeda", NULL); 54 if (IS_ERR_OR_NULL(mdev->debugfs_root)) 55 return; 56 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 struct attribute *komeda_sysfs_entries[] = { 95 &dev_attr_core_id.attr, 96 &dev_attr_config_id.attr, 97 NULL, 98 }; 99 100 static struct attribute_group komeda_sysfs_attr_group = { 101 .attrs = komeda_sysfs_entries, 102 }; 103 104 static int komeda_parse_pipe_dt(struct komeda_dev *mdev, struct device_node *np) 105 { 106 struct komeda_pipeline *pipe; 107 struct clk *clk; 108 u32 pipe_id; 109 int ret = 0; 110 111 ret = of_property_read_u32(np, "reg", &pipe_id); 112 if (ret != 0 || pipe_id >= mdev->n_pipelines) 113 return -EINVAL; 114 115 pipe = mdev->pipelines[pipe_id]; 116 117 clk = of_clk_get_by_name(np, "aclk"); 118 if (IS_ERR(clk)) { 119 DRM_ERROR("get aclk for pipeline %d failed!\n", pipe_id); 120 return PTR_ERR(clk); 121 } 122 pipe->aclk = clk; 123 124 clk = of_clk_get_by_name(np, "pxclk"); 125 if (IS_ERR(clk)) { 126 DRM_ERROR("get pxclk for pipeline %d failed!\n", pipe_id); 127 return PTR_ERR(clk); 128 } 129 pipe->pxlclk = clk; 130 131 /* enum ports */ 132 pipe->of_output_dev = 133 of_graph_get_remote_node(np, KOMEDA_OF_PORT_OUTPUT, 0); 134 pipe->of_output_port = 135 of_graph_get_port_by_id(np, KOMEDA_OF_PORT_OUTPUT); 136 137 pipe->of_node = np; 138 139 return 0; 140 } 141 142 static int komeda_parse_dt(struct device *dev, struct komeda_dev *mdev) 143 { 144 struct platform_device *pdev = to_platform_device(dev); 145 struct device_node *child, *np = dev->of_node; 146 struct clk *clk; 147 int ret; 148 149 clk = devm_clk_get(dev, "mclk"); 150 if (IS_ERR(clk)) 151 return PTR_ERR(clk); 152 153 mdev->mclk = clk; 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 for_each_available_child_of_node(np, child) { 161 if (of_node_cmp(child->name, "pipeline") == 0) { 162 ret = komeda_parse_pipe_dt(mdev, child); 163 if (ret) { 164 DRM_ERROR("parse pipeline dt error!\n"); 165 of_node_put(child); 166 break; 167 } 168 } 169 } 170 171 return ret; 172 } 173 174 struct komeda_dev *komeda_dev_create(struct device *dev) 175 { 176 struct platform_device *pdev = to_platform_device(dev); 177 const struct komeda_product_data *product; 178 struct komeda_dev *mdev; 179 struct resource *io_res; 180 int err = 0; 181 182 product = of_device_get_match_data(dev); 183 if (!product) 184 return ERR_PTR(-ENODEV); 185 186 io_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 187 if (!io_res) { 188 DRM_ERROR("No registers defined.\n"); 189 return ERR_PTR(-ENODEV); 190 } 191 192 mdev = devm_kzalloc(dev, sizeof(*mdev), GFP_KERNEL); 193 if (!mdev) 194 return ERR_PTR(-ENOMEM); 195 196 mutex_init(&mdev->lock); 197 198 mdev->dev = dev; 199 mdev->reg_base = devm_ioremap_resource(dev, io_res); 200 if (IS_ERR(mdev->reg_base)) { 201 DRM_ERROR("Map register space failed.\n"); 202 err = PTR_ERR(mdev->reg_base); 203 mdev->reg_base = NULL; 204 goto err_cleanup; 205 } 206 207 mdev->pclk = devm_clk_get(dev, "pclk"); 208 if (IS_ERR(mdev->pclk)) { 209 DRM_ERROR("Get APB clk failed.\n"); 210 err = PTR_ERR(mdev->pclk); 211 mdev->pclk = NULL; 212 goto err_cleanup; 213 } 214 215 /* Enable APB clock to access the registers */ 216 clk_prepare_enable(mdev->pclk); 217 218 mdev->funcs = product->identify(mdev->reg_base, &mdev->chip); 219 if (!komeda_product_match(mdev, product->product_id)) { 220 DRM_ERROR("DT configured %x mismatch with real HW %x.\n", 221 product->product_id, 222 MALIDP_CORE_ID_PRODUCT_ID(mdev->chip.core_id)); 223 err = -ENODEV; 224 goto err_cleanup; 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 err_cleanup; 238 } 239 240 err = komeda_parse_dt(dev, mdev); 241 if (err) { 242 DRM_ERROR("parse device tree failed.\n"); 243 goto err_cleanup; 244 } 245 246 err = komeda_assemble_pipelines(mdev); 247 if (err) { 248 DRM_ERROR("assemble display pipelines failed.\n"); 249 goto err_cleanup; 250 } 251 252 err = sysfs_create_group(&dev->kobj, &komeda_sysfs_attr_group); 253 if (err) { 254 DRM_ERROR("create sysfs group failed.\n"); 255 goto err_cleanup; 256 } 257 258 #ifdef CONFIG_DEBUG_FS 259 komeda_debugfs_init(mdev); 260 #endif 261 262 return mdev; 263 264 err_cleanup: 265 komeda_dev_destroy(mdev); 266 return ERR_PTR(err); 267 } 268 269 void komeda_dev_destroy(struct komeda_dev *mdev) 270 { 271 struct device *dev = mdev->dev; 272 const struct komeda_dev_funcs *funcs = mdev->funcs; 273 int i; 274 275 sysfs_remove_group(&dev->kobj, &komeda_sysfs_attr_group); 276 277 #ifdef CONFIG_DEBUG_FS 278 debugfs_remove_recursive(mdev->debugfs_root); 279 #endif 280 281 for (i = 0; i < mdev->n_pipelines; i++) { 282 komeda_pipeline_destroy(mdev, mdev->pipelines[i]); 283 mdev->pipelines[i] = NULL; 284 } 285 286 mdev->n_pipelines = 0; 287 288 if (funcs && funcs->cleanup) 289 funcs->cleanup(mdev); 290 291 if (mdev->reg_base) { 292 devm_iounmap(dev, mdev->reg_base); 293 mdev->reg_base = NULL; 294 } 295 296 if (mdev->mclk) { 297 devm_clk_put(dev, mdev->mclk); 298 mdev->mclk = NULL; 299 } 300 301 if (mdev->pclk) { 302 clk_disable_unprepare(mdev->pclk); 303 devm_clk_put(dev, mdev->pclk); 304 mdev->pclk = NULL; 305 } 306 307 devm_kfree(dev, mdev); 308 } 309