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_dev = 125 of_graph_get_remote_node(np, KOMEDA_OF_PORT_OUTPUT, 0); 126 pipe->of_output_port = 127 of_graph_get_port_by_id(np, KOMEDA_OF_PORT_OUTPUT); 128 129 pipe->of_node = np; 130 131 return 0; 132 } 133 134 static int komeda_parse_dt(struct device *dev, struct komeda_dev *mdev) 135 { 136 struct platform_device *pdev = to_platform_device(dev); 137 struct device_node *child, *np = dev->of_node; 138 int ret; 139 140 mdev->irq = platform_get_irq(pdev, 0); 141 if (mdev->irq < 0) { 142 DRM_ERROR("could not get IRQ number.\n"); 143 return mdev->irq; 144 } 145 146 for_each_available_child_of_node(np, child) { 147 if (of_node_cmp(child->name, "pipeline") == 0) { 148 ret = komeda_parse_pipe_dt(mdev, child); 149 if (ret) { 150 DRM_ERROR("parse pipeline dt error!\n"); 151 of_node_put(child); 152 break; 153 } 154 } 155 } 156 157 return ret; 158 } 159 160 struct komeda_dev *komeda_dev_create(struct device *dev) 161 { 162 struct platform_device *pdev = to_platform_device(dev); 163 const struct komeda_product_data *product; 164 struct komeda_dev *mdev; 165 struct resource *io_res; 166 int err = 0; 167 168 product = of_device_get_match_data(dev); 169 if (!product) 170 return ERR_PTR(-ENODEV); 171 172 io_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 173 if (!io_res) { 174 DRM_ERROR("No registers defined.\n"); 175 return ERR_PTR(-ENODEV); 176 } 177 178 mdev = devm_kzalloc(dev, sizeof(*mdev), GFP_KERNEL); 179 if (!mdev) 180 return ERR_PTR(-ENOMEM); 181 182 mutex_init(&mdev->lock); 183 184 mdev->dev = dev; 185 mdev->reg_base = devm_ioremap_resource(dev, io_res); 186 if (IS_ERR(mdev->reg_base)) { 187 DRM_ERROR("Map register space failed.\n"); 188 err = PTR_ERR(mdev->reg_base); 189 mdev->reg_base = NULL; 190 goto err_cleanup; 191 } 192 193 mdev->aclk = devm_clk_get(dev, "aclk"); 194 if (IS_ERR(mdev->aclk)) { 195 DRM_ERROR("Get engine clk failed.\n"); 196 err = PTR_ERR(mdev->aclk); 197 mdev->aclk = NULL; 198 goto err_cleanup; 199 } 200 201 clk_prepare_enable(mdev->aclk); 202 203 mdev->funcs = product->identify(mdev->reg_base, &mdev->chip); 204 if (!komeda_product_match(mdev, product->product_id)) { 205 DRM_ERROR("DT configured %x mismatch with real HW %x.\n", 206 product->product_id, 207 MALIDP_CORE_ID_PRODUCT_ID(mdev->chip.core_id)); 208 err = -ENODEV; 209 goto err_cleanup; 210 } 211 212 DRM_INFO("Found ARM Mali-D%x version r%dp%d\n", 213 MALIDP_CORE_ID_PRODUCT_ID(mdev->chip.core_id), 214 MALIDP_CORE_ID_MAJOR(mdev->chip.core_id), 215 MALIDP_CORE_ID_MINOR(mdev->chip.core_id)); 216 217 mdev->funcs->init_format_table(mdev); 218 219 err = mdev->funcs->enum_resources(mdev); 220 if (err) { 221 DRM_ERROR("enumerate display resource failed.\n"); 222 goto err_cleanup; 223 } 224 225 err = komeda_parse_dt(dev, mdev); 226 if (err) { 227 DRM_ERROR("parse device tree failed.\n"); 228 goto err_cleanup; 229 } 230 231 err = komeda_assemble_pipelines(mdev); 232 if (err) { 233 DRM_ERROR("assemble display pipelines failed.\n"); 234 goto err_cleanup; 235 } 236 237 dev->dma_parms = &mdev->dma_parms; 238 dma_set_max_seg_size(dev, DMA_BIT_MASK(32)); 239 240 mdev->iommu = iommu_get_domain_for_dev(mdev->dev); 241 if (!mdev->iommu) 242 DRM_INFO("continue without IOMMU support!\n"); 243 244 if (mdev->iommu && mdev->funcs->connect_iommu) { 245 err = mdev->funcs->connect_iommu(mdev); 246 if (err) { 247 mdev->iommu = NULL; 248 goto err_cleanup; 249 } 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 if (mdev->iommu && mdev->funcs->disconnect_iommu) 282 mdev->funcs->disconnect_iommu(mdev); 283 mdev->iommu = NULL; 284 285 for (i = 0; i < mdev->n_pipelines; i++) { 286 komeda_pipeline_destroy(mdev, mdev->pipelines[i]); 287 mdev->pipelines[i] = NULL; 288 } 289 290 mdev->n_pipelines = 0; 291 292 if (funcs && funcs->cleanup) 293 funcs->cleanup(mdev); 294 295 if (mdev->reg_base) { 296 devm_iounmap(dev, mdev->reg_base); 297 mdev->reg_base = NULL; 298 } 299 300 if (mdev->aclk) { 301 clk_disable_unprepare(mdev->aclk); 302 devm_clk_put(dev, mdev->aclk); 303 mdev->aclk = NULL; 304 } 305 306 devm_kfree(dev, mdev); 307 } 308