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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/pm_runtime.h>
14#include <linux/dma-mapping.h>
15#ifdef CONFIG_DEBUG_FS
16#include <linux/debugfs.h>
17#include <linux/seq_file.h>
18#endif
19
20#include <drm/drm_print.h>
21
22#include "komeda_dev.h"
23
24static int komeda_register_show(struct seq_file *sf, void *x)
25{
26 struct komeda_dev *mdev = sf->private;
27 int i;
28
29 seq_puts(sf, "\n====== Komeda register dump =========\n");
30
31 pm_runtime_get_sync(mdev->dev);
32
33 if (mdev->funcs->dump_register)
34 mdev->funcs->dump_register(mdev, sf);
35
36 for (i = 0; i < mdev->n_pipelines; i++)
37 komeda_pipeline_dump_register(mdev->pipelines[i], sf);
38
39 pm_runtime_put(mdev->dev);
40
41 return 0;
42}
43
44static int komeda_register_open(struct inode *inode, struct file *filp)
45{
46 return single_open(filp, komeda_register_show, inode->i_private);
47}
48
49static const struct file_operations komeda_register_fops = {
50 .owner = THIS_MODULE,
51 .open = komeda_register_open,
52 .read = seq_read,
53 .llseek = seq_lseek,
54 .release = single_release,
55};
56
57#ifdef CONFIG_DEBUG_FS
58static void komeda_debugfs_init(struct komeda_dev *mdev)
59{
60 if (!debugfs_initialized())
61 return;
62
63 mdev->debugfs_root = debugfs_create_dir("komeda", NULL);
64 debugfs_create_file("register", 0444, mdev->debugfs_root,
65 mdev, &komeda_register_fops);
66 debugfs_create_x16("err_verbosity", 0664, mdev->debugfs_root,
67 &mdev->err_verbosity);
68}
69#endif
70
71static ssize_t
72core_id_show(struct device *dev, struct device_attribute *attr, char *buf)
73{
74 struct komeda_dev *mdev = dev_to_mdev(dev);
75
76 return snprintf(buf, PAGE_SIZE, "0x%08x\n", mdev->chip.core_id);
77}
78static DEVICE_ATTR_RO(core_id);
79
80static ssize_t
81config_id_show(struct device *dev, struct device_attribute *attr, char *buf)
82{
83 struct komeda_dev *mdev = dev_to_mdev(dev);
84 struct komeda_pipeline *pipe = mdev->pipelines[0];
85 union komeda_config_id config_id;
86 int i;
87
88 memset(&config_id, 0, sizeof(config_id));
89
90 config_id.max_line_sz = pipe->layers[0]->hsize_in.end;
91 config_id.n_pipelines = mdev->n_pipelines;
92 config_id.n_scalers = pipe->n_scalers;
93 config_id.n_layers = pipe->n_layers;
94 config_id.n_richs = 0;
95 for (i = 0; i < pipe->n_layers; i++) {
96 if (pipe->layers[i]->layer_type == KOMEDA_FMT_RICH_LAYER)
97 config_id.n_richs++;
98 }
99 return snprintf(buf, PAGE_SIZE, "0x%08x\n", config_id.value);
100}
101static DEVICE_ATTR_RO(config_id);
102
103static ssize_t
104aclk_hz_show(struct device *dev, struct device_attribute *attr, char *buf)
105{
106 struct komeda_dev *mdev = dev_to_mdev(dev);
107
108 return snprintf(buf, PAGE_SIZE, "%lu\n", clk_get_rate(mdev->aclk));
109}
110static DEVICE_ATTR_RO(aclk_hz);
111
112static struct attribute *komeda_sysfs_entries[] = {
113 &dev_attr_core_id.attr,
114 &dev_attr_config_id.attr,
115 &dev_attr_aclk_hz.attr,
116 NULL,
117};
118
119static struct attribute_group komeda_sysfs_attr_group = {
120 .attrs = komeda_sysfs_entries,
121};
122
123static int komeda_parse_pipe_dt(struct komeda_pipeline *pipe)
124{
125 struct device_node *np = pipe->of_node;
126 struct clk *clk;
127
128 clk = of_clk_get_by_name(np, "pxclk");
129 if (IS_ERR(clk)) {
130 DRM_ERROR("get pxclk for pipeline %d failed!\n", pipe->id);
131 return PTR_ERR(clk);
132 }
133 pipe->pxlclk = clk;
134
135
136 pipe->of_output_links[0] =
137 of_graph_get_remote_node(np, KOMEDA_OF_PORT_OUTPUT, 0);
138 pipe->of_output_links[1] =
139 of_graph_get_remote_node(np, KOMEDA_OF_PORT_OUTPUT, 1);
140 pipe->of_output_port =
141 of_graph_get_port_by_id(np, KOMEDA_OF_PORT_OUTPUT);
142
143 pipe->dual_link = pipe->of_output_links[0] && pipe->of_output_links[1];
144
145 return 0;
146}
147
148static 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 struct komeda_pipeline *pipe;
153 u32 pipe_id = U32_MAX;
154 int ret = -1;
155
156 mdev->irq = platform_get_irq(pdev, 0);
157 if (mdev->irq < 0) {
158 DRM_ERROR("could not get IRQ number.\n");
159 return mdev->irq;
160 }
161
162
163 ret = of_reserved_mem_device_init(dev);
164 if (ret && ret != -ENODEV)
165 return ret;
166 ret = 0;
167
168 for_each_available_child_of_node(np, child) {
169 if (of_node_name_eq(child, "pipeline")) {
170 of_property_read_u32(child, "reg", &pipe_id);
171 if (pipe_id >= mdev->n_pipelines) {
172 DRM_WARN("Skip the redundant DT node: pipeline-%u.\n",
173 pipe_id);
174 continue;
175 }
176 mdev->pipelines[pipe_id]->of_node = of_node_get(child);
177 }
178 }
179
180 for (pipe_id = 0; pipe_id < mdev->n_pipelines; pipe_id++) {
181 pipe = mdev->pipelines[pipe_id];
182
183 if (!pipe->of_node) {
184 DRM_ERROR("Pipeline-%d doesn't have a DT node.\n",
185 pipe->id);
186 return -EINVAL;
187 }
188 ret = komeda_parse_pipe_dt(pipe);
189 if (ret)
190 return ret;
191 }
192
193 return 0;
194}
195
196struct komeda_dev *komeda_dev_create(struct device *dev)
197{
198 struct platform_device *pdev = to_platform_device(dev);
199 komeda_identify_func komeda_identify;
200 struct komeda_dev *mdev;
201 int err = 0;
202
203 komeda_identify = of_device_get_match_data(dev);
204 if (!komeda_identify)
205 return ERR_PTR(-ENODEV);
206
207 mdev = devm_kzalloc(dev, sizeof(*mdev), GFP_KERNEL);
208 if (!mdev)
209 return ERR_PTR(-ENOMEM);
210
211 mutex_init(&mdev->lock);
212
213 mdev->dev = dev;
214 mdev->reg_base = devm_platform_ioremap_resource(pdev, 0);
215 if (IS_ERR(mdev->reg_base)) {
216 DRM_ERROR("Map register space failed.\n");
217 err = PTR_ERR(mdev->reg_base);
218 mdev->reg_base = NULL;
219 goto err_cleanup;
220 }
221
222 mdev->aclk = devm_clk_get(dev, "aclk");
223 if (IS_ERR(mdev->aclk)) {
224 DRM_ERROR("Get engine clk failed.\n");
225 err = PTR_ERR(mdev->aclk);
226 mdev->aclk = NULL;
227 goto err_cleanup;
228 }
229
230 clk_prepare_enable(mdev->aclk);
231
232 mdev->funcs = komeda_identify(mdev->reg_base, &mdev->chip);
233 if (!mdev->funcs) {
234 DRM_ERROR("Failed to identify the HW.\n");
235 err = -ENODEV;
236 goto disable_clk;
237 }
238
239 DRM_INFO("Found ARM Mali-D%x version r%dp%d\n",
240 MALIDP_CORE_ID_PRODUCT_ID(mdev->chip.core_id),
241 MALIDP_CORE_ID_MAJOR(mdev->chip.core_id),
242 MALIDP_CORE_ID_MINOR(mdev->chip.core_id));
243
244 mdev->funcs->init_format_table(mdev);
245
246 err = mdev->funcs->enum_resources(mdev);
247 if (err) {
248 DRM_ERROR("enumerate display resource failed.\n");
249 goto disable_clk;
250 }
251
252 err = komeda_parse_dt(dev, mdev);
253 if (err) {
254 DRM_ERROR("parse device tree failed.\n");
255 goto disable_clk;
256 }
257
258 err = komeda_assemble_pipelines(mdev);
259 if (err) {
260 DRM_ERROR("assemble display pipelines failed.\n");
261 goto disable_clk;
262 }
263
264 dev->dma_parms = &mdev->dma_parms;
265 dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
266
267 mdev->iommu = iommu_get_domain_for_dev(mdev->dev);
268 if (!mdev->iommu)
269 DRM_INFO("continue without IOMMU support!\n");
270
271 clk_disable_unprepare(mdev->aclk);
272
273 err = sysfs_create_group(&dev->kobj, &komeda_sysfs_attr_group);
274 if (err) {
275 DRM_ERROR("create sysfs group failed.\n");
276 goto err_cleanup;
277 }
278
279 mdev->err_verbosity = KOMEDA_DEV_PRINT_ERR_EVENTS;
280
281#ifdef CONFIG_DEBUG_FS
282 komeda_debugfs_init(mdev);
283#endif
284
285 return mdev;
286
287disable_clk:
288 clk_disable_unprepare(mdev->aclk);
289err_cleanup:
290 komeda_dev_destroy(mdev);
291 return ERR_PTR(err);
292}
293
294void komeda_dev_destroy(struct komeda_dev *mdev)
295{
296 struct device *dev = mdev->dev;
297 const struct komeda_dev_funcs *funcs = mdev->funcs;
298 int i;
299
300 sysfs_remove_group(&dev->kobj, &komeda_sysfs_attr_group);
301
302#ifdef CONFIG_DEBUG_FS
303 debugfs_remove_recursive(mdev->debugfs_root);
304#endif
305
306 if (mdev->aclk)
307 clk_prepare_enable(mdev->aclk);
308
309 for (i = 0; i < mdev->n_pipelines; i++) {
310 komeda_pipeline_destroy(mdev, mdev->pipelines[i]);
311 mdev->pipelines[i] = NULL;
312 }
313
314 mdev->n_pipelines = 0;
315
316 of_reserved_mem_device_release(dev);
317
318 if (funcs && funcs->cleanup)
319 funcs->cleanup(mdev);
320
321 if (mdev->reg_base) {
322 devm_iounmap(dev, mdev->reg_base);
323 mdev->reg_base = NULL;
324 }
325
326 if (mdev->aclk) {
327 clk_disable_unprepare(mdev->aclk);
328 devm_clk_put(dev, mdev->aclk);
329 mdev->aclk = NULL;
330 }
331
332 devm_kfree(dev, mdev);
333}
334
335int komeda_dev_resume(struct komeda_dev *mdev)
336{
337 clk_prepare_enable(mdev->aclk);
338
339 mdev->funcs->enable_irq(mdev);
340
341 if (mdev->iommu && mdev->funcs->connect_iommu)
342 if (mdev->funcs->connect_iommu(mdev))
343 DRM_ERROR("connect iommu failed.\n");
344
345 return 0;
346}
347
348int komeda_dev_suspend(struct komeda_dev *mdev)
349{
350 if (mdev->iommu && mdev->funcs->disconnect_iommu)
351 if (mdev->funcs->disconnect_iommu(mdev))
352 DRM_ERROR("disconnect iommu failed.\n");
353
354 mdev->funcs->disable_irq(mdev);
355
356 clk_disable_unprepare(mdev->aclk);
357
358 return 0;
359}
360
