1 // SPDX-License-Identifier: GPL-2.0
3 * (C) COPYRIGHT 2018 ARM Limited. All rights reserved.
4 * Author: James.Qian.Wang <james.qian.wang@arm.com>
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>
16 #include <drm/drm_print.h>
18 #include "komeda_dev.h"
20 static int komeda_register_show(struct seq_file *sf, void *x)
22 struct komeda_dev *mdev = sf->private;
25 if (mdev->funcs->dump_register)
26 mdev->funcs->dump_register(mdev, sf);
28 for (i = 0; i < mdev->n_pipelines; i++)
29 komeda_pipeline_dump_register(mdev->pipelines[i], sf);
34 static int komeda_register_open(struct inode *inode, struct file *filp)
36 return single_open(filp, komeda_register_show, inode->i_private);
39 static const struct file_operations komeda_register_fops = {
41 .open = komeda_register_open,
44 .release = single_release,
47 #ifdef CONFIG_DEBUG_FS
48 static void komeda_debugfs_init(struct komeda_dev *mdev)
50 if (!debugfs_initialized())
53 mdev->debugfs_root = debugfs_create_dir("komeda", NULL);
54 if (IS_ERR_OR_NULL(mdev->debugfs_root))
57 debugfs_create_file("register", 0444, mdev->debugfs_root,
58 mdev, &komeda_register_fops);
63 core_id_show(struct device *dev, struct device_attribute *attr, char *buf)
65 struct komeda_dev *mdev = dev_to_mdev(dev);
67 return snprintf(buf, PAGE_SIZE, "0x%08x\n", mdev->chip.core_id);
69 static DEVICE_ATTR_RO(core_id);
72 config_id_show(struct device *dev, struct device_attribute *attr, char *buf)
74 struct komeda_dev *mdev = dev_to_mdev(dev);
75 struct komeda_pipeline *pipe = mdev->pipelines[0];
76 union komeda_config_id config_id;
79 memset(&config_id, 0, sizeof(config_id));
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)
90 return snprintf(buf, PAGE_SIZE, "0x%08x\n", config_id.value);
92 static DEVICE_ATTR_RO(config_id);
94 static struct attribute *komeda_sysfs_entries[] = {
95 &dev_attr_core_id.attr,
96 &dev_attr_config_id.attr,
100 static struct attribute_group komeda_sysfs_attr_group = {
101 .attrs = komeda_sysfs_entries,
104 static int komeda_parse_pipe_dt(struct komeda_dev *mdev, struct device_node *np)
106 struct komeda_pipeline *pipe;
111 ret = of_property_read_u32(np, "reg", &pipe_id);
112 if (ret != 0 || pipe_id >= mdev->n_pipelines)
115 pipe = mdev->pipelines[pipe_id];
117 clk = of_clk_get_by_name(np, "aclk");
119 DRM_ERROR("get aclk for pipeline %d failed!\n", pipe_id);
124 clk = of_clk_get_by_name(np, "pxclk");
126 DRM_ERROR("get pxclk for pipeline %d failed!\n", pipe_id);
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);
142 static int komeda_parse_dt(struct device *dev, struct komeda_dev *mdev)
144 struct platform_device *pdev = to_platform_device(dev);
145 struct device_node *child, *np = dev->of_node;
149 clk = devm_clk_get(dev, "mclk");
154 mdev->irq = platform_get_irq(pdev, 0);
156 DRM_ERROR("could not get IRQ number.\n");
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);
164 DRM_ERROR("parse pipeline dt error!\n");
174 struct komeda_dev *komeda_dev_create(struct device *dev)
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;
182 product = of_device_get_match_data(dev);
184 return ERR_PTR(-ENODEV);
186 io_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
188 DRM_ERROR("No registers defined.\n");
189 return ERR_PTR(-ENODEV);
192 mdev = devm_kzalloc(dev, sizeof(*mdev), GFP_KERNEL);
194 return ERR_PTR(-ENOMEM);
196 mutex_init(&mdev->lock);
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;
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);
215 /* Enable APB clock to access the registers */
216 clk_prepare_enable(mdev->pclk);
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",
222 MALIDP_CORE_ID_PRODUCT_ID(mdev->chip.core_id));
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));
232 mdev->funcs->init_format_table(mdev);
234 err = mdev->funcs->enum_resources(mdev);
236 DRM_ERROR("enumerate display resource failed.\n");
240 err = komeda_parse_dt(dev, mdev);
242 DRM_ERROR("parse device tree failed.\n");
246 err = komeda_assemble_pipelines(mdev);
248 DRM_ERROR("assemble display pipelines failed.\n");
252 err = sysfs_create_group(&dev->kobj, &komeda_sysfs_attr_group);
254 DRM_ERROR("create sysfs group failed.\n");
258 #ifdef CONFIG_DEBUG_FS
259 komeda_debugfs_init(mdev);
265 komeda_dev_destroy(mdev);
269 void komeda_dev_destroy(struct komeda_dev *mdev)
271 struct device *dev = mdev->dev;
272 struct komeda_dev_funcs *funcs = mdev->funcs;
275 sysfs_remove_group(&dev->kobj, &komeda_sysfs_attr_group);
277 #ifdef CONFIG_DEBUG_FS
278 debugfs_remove_recursive(mdev->debugfs_root);
281 for (i = 0; i < mdev->n_pipelines; i++) {
282 komeda_pipeline_destroy(mdev, mdev->pipelines[i]);
283 mdev->pipelines[i] = NULL;
286 mdev->n_pipelines = 0;
288 if (funcs && funcs->cleanup)
289 funcs->cleanup(mdev);
291 if (mdev->reg_base) {
292 devm_iounmap(dev, mdev->reg_base);
293 mdev->reg_base = NULL;
297 devm_clk_put(dev, mdev->mclk);
302 clk_disable_unprepare(mdev->pclk);
303 devm_clk_put(dev, mdev->pclk);
307 devm_kfree(dev, mdev);